-/*-*- Mode: C; c-basic-offset: 8 -*-*/
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
#include <sys/utsname.h>
#include <pwd.h>
#include <netinet/ip.h>
+#include <linux/kd.h>
+#include <dlfcn.h>
+#include <sys/wait.h>
+#include <sys/capability.h>
+#include <sys/time.h>
+#include <linux/rtc.h>
+#include <glob.h>
+#include <grp.h>
#include "macro.h"
#include "util.h"
#include "missing.h"
#include "log.h"
#include "strv.h"
+#include "label.h"
+#include "exit-status.h"
+#include "hashmap.h"
+
+int saved_argc = 0;
+char **saved_argv = NULL;
+
+size_t page_size(void) {
+ static __thread size_t pgsz = 0;
+ long r;
+
+ if (_likely_(pgsz))
+ return pgsz;
+
+ assert_se((r = sysconf(_SC_PAGESIZE)) > 0);
+
+ pgsz = (size_t) r;
+
+ return pgsz;
+}
bool streq_ptr(const char *a, const char *b) {
return ts;
}
+dual_timestamp* dual_timestamp_from_realtime(dual_timestamp *ts, usec_t u) {
+ int64_t delta;
+ assert(ts);
+
+ ts->realtime = u;
+
+ if (u == 0)
+ ts->monotonic = 0;
+ else {
+ delta = (int64_t) now(CLOCK_REALTIME) - (int64_t) u;
+
+ ts->monotonic = now(CLOCK_MONOTONIC);
+
+ if ((int64_t) ts->monotonic > delta)
+ ts->monotonic -= delta;
+ else
+ ts->monotonic = 0;
+ }
+
+ return ts;
+}
+
usec_t timespec_load(const struct timespec *ts) {
assert(ts);
for (;;) {
int r;
- if ((r = close(fd)) >= 0)
+ r = close(fd);
+ if (r >= 0)
return r;
if (errno != EINTR)
- return r;
+ return -errno;
}
}
}
int parse_pid(const char *s, pid_t* ret_pid) {
- unsigned long ul;
+ unsigned long ul = 0;
pid_t pid;
int r;
return 0;
}
+int parse_uid(const char *s, uid_t* ret_uid) {
+ unsigned long ul = 0;
+ uid_t uid;
+ int r;
+
+ assert(s);
+ assert(ret_uid);
+
+ if ((r = safe_atolu(s, &ul)) < 0)
+ return r;
+
+ uid = (uid_t) ul;
+
+ if ((unsigned long) uid != ul)
+ return -ERANGE;
+
+ *ret_uid = uid;
+ return 0;
+}
+
int safe_atou(const char *s, unsigned *ret_u) {
char *x = NULL;
unsigned long l;
int get_parent_of_pid(pid_t pid, pid_t *_ppid) {
int r;
FILE *f;
- char fn[132], line[256], *p;
+ char fn[PATH_MAX], line[LINE_MAX], *p;
long unsigned ppid;
- assert(pid >= 0);
+ assert(pid > 0);
assert(_ppid);
assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1));
- fn[sizeof(fn)-1] = 0;
+ char_array_0(fn);
- if (!(f = fopen(fn, "r")))
+ if (!(f = fopen(fn, "re")))
return -errno;
if (!(fgets(line, sizeof(line), f))) {
return 0;
}
+int get_starttime_of_pid(pid_t pid, unsigned long long *st) {
+ int r;
+ FILE *f;
+ char fn[PATH_MAX], line[LINE_MAX], *p;
+
+ assert(pid > 0);
+ assert(st);
+
+ assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%lu/stat", (unsigned long) pid) < (int) (sizeof(fn)-1));
+ char_array_0(fn);
+
+ if (!(f = fopen(fn, "re")))
+ return -errno;
+
+ if (!(fgets(line, sizeof(line), f))) {
+ r = -errno;
+ fclose(f);
+ return r;
+ }
+
+ fclose(f);
+
+ /* Let's skip the pid and comm fields. The latter is enclosed
+ * in () but does not escape any () in its value, so let's
+ * skip over it manually */
+
+ if (!(p = strrchr(line, ')')))
+ return -EIO;
+
+ p++;
+
+ if (sscanf(p, " "
+ "%*c " /* state */
+ "%*d " /* ppid */
+ "%*d " /* pgrp */
+ "%*d " /* session */
+ "%*d " /* tty_nr */
+ "%*d " /* tpgid */
+ "%*u " /* flags */
+ "%*u " /* minflt */
+ "%*u " /* cminflt */
+ "%*u " /* majflt */
+ "%*u " /* cmajflt */
+ "%*u " /* utime */
+ "%*u " /* stime */
+ "%*d " /* cutime */
+ "%*d " /* cstime */
+ "%*d " /* priority */
+ "%*d " /* nice */
+ "%*d " /* num_threads */
+ "%*d " /* itrealvalue */
+ "%llu " /* starttime */,
+ st) != 1)
+ return -EIO;
+
+ return 0;
+}
+
int write_one_line_file(const char *fn, const char *line) {
FILE *f;
int r;
if (!(f = fopen(fn, "we")))
return -errno;
+ errno = 0;
if (fputs(line, f) < 0) {
r = -errno;
goto finish;
}
- r = 0;
+ if (!endswith(line, "\n"))
+ fputc('\n', f);
+
+ fflush(f);
+
+ if (ferror(f)) {
+ if (errno != 0)
+ r = -errno;
+ else
+ r = -EIO;
+ } else
+ r = 0;
+
+finish:
+ fclose(f);
+ return r;
+}
+
+int fchmod_umask(int fd, mode_t m) {
+ mode_t u;
+ int r;
+
+ u = umask(0777);
+ r = fchmod(fd, m & (~u)) < 0 ? -errno : 0;
+ umask(u);
+
+ return r;
+}
+
+int write_one_line_file_atomic(const char *fn, const char *line) {
+ FILE *f;
+ int r;
+ char *p;
+
+ assert(fn);
+ assert(line);
+
+ r = fopen_temporary(fn, &f, &p);
+ if (r < 0)
+ return r;
+
+ fchmod_umask(fileno(f), 0644);
+
+ errno = 0;
+ if (fputs(line, f) < 0) {
+ r = -errno;
+ goto finish;
+ }
+
+ if (!endswith(line, "\n"))
+ fputc('\n', f);
+
+ fflush(f);
+
+ if (ferror(f)) {
+ if (errno != 0)
+ r = -errno;
+ else
+ r = -EIO;
+ } else {
+ if (rename(p, fn) < 0)
+ r = -errno;
+ else
+ r = 0;
+ }
+
finish:
+ if (r < 0)
+ unlink(p);
+
fclose(f);
+ free(p);
+
return r;
}
int read_one_line_file(const char *fn, char **line) {
FILE *f;
int r;
- char t[2048], *c;
+ char t[LINE_MAX], *c;
assert(fn);
assert(line);
goto finish;
}
+ truncate_nl(c);
+
*line = c;
r = 0;
return r;
}
-char *truncate_nl(char *s) {
- assert(s);
-
- s[strcspn(s, NEWLINE)] = 0;
- return s;
-}
-
-int get_process_name(pid_t pid, char **name) {
- char *p;
+int read_full_file(const char *fn, char **contents, size_t *size) {
+ FILE *f;
int r;
+ size_t n, l;
+ char *buf = NULL;
+ struct stat st;
- assert(pid >= 1);
- assert(name);
+ if (!(f = fopen(fn, "re")))
+ return -errno;
- if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0)
- return -ENOMEM;
+ if (fstat(fileno(f), &st) < 0) {
+ r = -errno;
+ goto finish;
+ }
- r = read_one_line_file(p, name);
- free(p);
+ /* Safety check */
+ if (st.st_size > 4*1024*1024) {
+ r = -E2BIG;
+ goto finish;
+ }
- if (r < 0)
- return r;
+ n = st.st_size > 0 ? st.st_size : LINE_MAX;
+ l = 0;
- truncate_nl(*name);
- return 0;
-}
+ for (;;) {
+ char *t;
+ size_t k;
-int get_process_cmdline(pid_t pid, size_t max_length, char **line) {
- char *p, *r, *k;
- int c;
- bool space = false;
- size_t left;
- FILE *f;
+ if (!(t = realloc(buf, n+1))) {
+ r = -ENOMEM;
+ goto finish;
+ }
- assert(pid >= 1);
- assert(max_length > 0);
- assert(line);
+ buf = t;
+ k = fread(buf + l, 1, n - l, f);
- if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0)
- return -ENOMEM;
+ if (k <= 0) {
+ if (ferror(f)) {
+ r = -errno;
+ goto finish;
+ }
- f = fopen(p, "r");
- free(p);
+ break;
+ }
- if (!f)
- return -errno;
+ l += k;
+ n *= 2;
- if (!(r = new(char, max_length))) {
- fclose(f);
- return -ENOMEM;
+ /* Safety check */
+ if (n > 4*1024*1024) {
+ r = -E2BIG;
+ goto finish;
+ }
}
- k = r;
- left = max_length;
- while ((c = getc(f)) != EOF) {
-
- if (isprint(c)) {
- if (space) {
- if (left <= 4)
- break;
-
- *(k++) = ' ';
- left--;
- space = false;
- }
+ if (buf)
+ buf[l] = 0;
+ else if (!(buf = calloc(1, 1))) {
+ r = -errno;
+ goto finish;
+ }
- if (left <= 4)
- break;
+ *contents = buf;
+ buf = NULL;
- *(k++) = (char) c;
- left--;
- } else
- space = true;
- }
+ if (size)
+ *size = l;
- if (left <= 4) {
- size_t n = MIN(left-1, 3U);
- memcpy(k, "...", n);
- k[n] = 0;
- } else
- *k = 0;
+ r = 0;
+finish:
fclose(f);
+ free(buf);
- *line = r;
- return 0;
+ return r;
}
-char *strappend(const char *s, const char *suffix) {
- size_t a, b;
- char *r;
+int parse_env_file(
+ const char *fname,
+ const char *separator, ...) {
- assert(s);
- assert(suffix);
+ int r = 0;
+ char *contents = NULL, *p;
- a = strlen(s);
- b = strlen(suffix);
+ assert(fname);
+ assert(separator);
- if (!(r = new(char, a+b+1)))
- return NULL;
+ if ((r = read_full_file(fname, &contents, NULL)) < 0)
+ return r;
- memcpy(r, s, a);
- memcpy(r+a, suffix, b);
- r[a+b] = 0;
+ p = contents;
+ for (;;) {
+ const char *key = NULL;
- return r;
-}
+ p += strspn(p, separator);
+ p += strspn(p, WHITESPACE);
-int readlink_malloc(const char *p, char **r) {
- size_t l = 100;
+ if (!*p)
+ break;
- assert(p);
- assert(r);
+ if (!strchr(COMMENTS, *p)) {
+ va_list ap;
+ char **value;
- for (;;) {
- char *c;
- ssize_t n;
+ va_start(ap, separator);
+ while ((key = va_arg(ap, char *))) {
+ size_t n;
+ char *v;
- if (!(c = new(char, l)))
- return -ENOMEM;
+ value = va_arg(ap, char **);
- if ((n = readlink(p, c, l-1)) < 0) {
- int ret = -errno;
- free(c);
- return ret;
- }
+ n = strlen(key);
+ if (strncmp(p, key, n) != 0 ||
+ p[n] != '=')
+ continue;
- if ((size_t) n < l-1) {
- c[n] = 0;
- *r = c;
- return 0;
- }
+ p += n + 1;
+ n = strcspn(p, separator);
- free(c);
- l *= 2;
- }
-}
+ if (n >= 2 &&
+ strchr(QUOTES, p[0]) &&
+ p[n-1] == p[0])
+ v = strndup(p+1, n-2);
+ else
+ v = strndup(p, n);
-int readlink_and_make_absolute(const char *p, char **r) {
- char *target, *k;
- int j;
+ if (!v) {
+ r = -ENOMEM;
+ va_end(ap);
+ goto fail;
+ }
- assert(p);
- assert(r);
+ if (v[0] == '\0') {
+ /* return empty value strings as NULL */
+ free(v);
+ v = NULL;
+ }
- if ((j = readlink_malloc(p, &target)) < 0)
- return j;
-
- k = file_in_same_dir(p, target);
- free(target);
+ free(*value);
+ *value = v;
- if (!k)
- return -ENOMEM;
+ p += n;
- *r = k;
- return 0;
-}
+ r ++;
+ break;
+ }
+ va_end(ap);
+ }
-char *file_name_from_path(const char *p) {
- char *r;
+ if (!key)
+ p += strcspn(p, separator);
+ }
- assert(p);
+fail:
+ free(contents);
+ return r;
+}
- if ((r = strrchr(p, '/')))
- return r + 1;
+int load_env_file(
+ const char *fname,
+ char ***rl) {
- return (char*) p;
-}
+ FILE *f;
+ char **m = 0;
+ int r;
-bool path_is_absolute(const char *p) {
- assert(p);
+ assert(fname);
+ assert(rl);
- return p[0] == '/';
-}
+ if (!(f = fopen(fname, "re")))
+ return -errno;
-bool is_path(const char *p) {
+ while (!feof(f)) {
+ char l[LINE_MAX], *p, *u;
+ char **t;
- return !!strchr(p, '/');
-}
+ if (!fgets(l, sizeof(l), f)) {
+ if (feof(f))
+ break;
-char *path_make_absolute(const char *p, const char *prefix) {
- char *r;
+ r = -errno;
+ goto finish;
+ }
- assert(p);
+ p = strstrip(l);
- /* Makes every item in the list an absolute path by prepending
- * the prefix, if specified and necessary */
+ if (!*p)
+ continue;
- if (path_is_absolute(p) || !prefix)
- return strdup(p);
+ if (strchr(COMMENTS, *p))
+ continue;
- if (asprintf(&r, "%s/%s", prefix, p) < 0)
- return NULL;
+ if (!(u = normalize_env_assignment(p))) {
+ log_error("Out of memory");
+ r = -ENOMEM;
+ goto finish;
+ }
- return r;
-}
+ t = strv_append(m, u);
+ free(u);
-char *path_make_absolute_cwd(const char *p) {
- char *cwd, *r;
+ if (!t) {
+ log_error("Out of memory");
+ r = -ENOMEM;
+ goto finish;
+ }
- assert(p);
+ strv_free(m);
+ m = t;
+ }
- /* Similar to path_make_absolute(), but prefixes with the
- * current working directory. */
+ r = 0;
- if (path_is_absolute(p))
- return strdup(p);
+ *rl = m;
+ m = NULL;
- if (!(cwd = get_current_dir_name()))
- return NULL;
+finish:
+ if (f)
+ fclose(f);
- r = path_make_absolute(p, cwd);
- free(cwd);
+ strv_free(m);
return r;
}
-char **strv_path_make_absolute_cwd(char **l) {
- char **s;
-
- /* Goes through every item in the string list and makes it
- * absolute. This works in place and won't rollback any
- * changes on failure. */
+int write_env_file(const char *fname, char **l) {
+ char **i, *p;
+ FILE *f;
+ int r;
- STRV_FOREACH(s, l) {
- char *t;
+ r = fopen_temporary(fname, &f, &p);
+ if (r < 0)
+ return r;
- if (!(t = path_make_absolute_cwd(*s)))
- return NULL;
+ fchmod_umask(fileno(f), 0644);
- free(*s);
- *s = t;
+ errno = 0;
+ STRV_FOREACH(i, l) {
+ fputs(*i, f);
+ fputc('\n', f);
}
- return l;
-}
-
-char **strv_path_canonicalize(char **l) {
- char **s;
- unsigned k = 0;
- bool enomem = false;
+ fflush(f);
- if (strv_isempty(l))
- return l;
+ if (ferror(f)) {
+ if (errno != 0)
+ r = -errno;
+ else
+ r = -EIO;
+ } else {
+ if (rename(p, fname) < 0)
+ r = -errno;
+ else
+ r = 0;
+ }
- /* Goes through every item in the string list and canonicalize
- * the path. This works in place and won't rollback any
- * changes on failure. */
+ if (r < 0)
+ unlink(p);
- STRV_FOREACH(s, l) {
- char *t, *u;
+ fclose(f);
+ free(p);
- t = path_make_absolute_cwd(*s);
- free(*s);
+ return r;
+}
- if (!t) {
- enomem = true;
- continue;
- }
+char *truncate_nl(char *s) {
+ assert(s);
- errno = 0;
- u = canonicalize_file_name(t);
- free(t);
+ s[strcspn(s, NEWLINE)] = 0;
+ return s;
+}
- if (!u) {
- if (errno == ENOMEM || !errno)
- enomem = true;
+int get_process_name(pid_t pid, char **name) {
+ char *p;
+ int r;
- continue;
- }
+ assert(pid >= 1);
+ assert(name);
- l[k++] = u;
- }
+ if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0)
+ return -ENOMEM;
- l[k] = NULL;
+ r = read_one_line_file(p, name);
+ free(p);
- if (enomem)
- return NULL;
+ if (r < 0)
+ return r;
- return l;
+ return 0;
}
-int reset_all_signal_handlers(void) {
- int sig;
+int get_process_cmdline(pid_t pid, size_t max_length, char **line) {
+ char *p, *r, *k;
+ int c;
+ bool space = false;
+ size_t left;
+ FILE *f;
- for (sig = 1; sig < _NSIG; sig++) {
- struct sigaction sa;
+ assert(pid >= 1);
+ assert(max_length > 0);
+ assert(line);
- if (sig == SIGKILL || sig == SIGSTOP)
- continue;
+ if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0)
+ return -ENOMEM;
- zero(sa);
- sa.sa_handler = SIG_DFL;
- sa.sa_flags = SA_RESTART;
+ f = fopen(p, "re");
+ free(p);
- /* On Linux the first two RT signals are reserved by
- * glibc, and sigaction() will return EINVAL for them. */
- if ((sigaction(sig, &sa, NULL) < 0))
- if (errno != EINVAL)
- return -errno;
+ if (!f)
+ return -errno;
+
+ if (!(r = new(char, max_length))) {
+ fclose(f);
+ return -ENOMEM;
}
- return 0;
-}
+ k = r;
+ left = max_length;
+ while ((c = getc(f)) != EOF) {
-char *strstrip(char *s) {
- char *e, *l = NULL;
+ if (isprint(c)) {
+ if (space) {
+ if (left <= 4)
+ break;
- /* Drops trailing whitespace. Modifies the string in
- * place. Returns pointer to first non-space character */
+ *(k++) = ' ';
+ left--;
+ space = false;
+ }
- s += strspn(s, WHITESPACE);
+ if (left <= 4)
+ break;
- for (e = s; *e; e++)
- if (!strchr(WHITESPACE, *e))
- l = e;
+ *(k++) = (char) c;
+ left--;
+ } else
+ space = true;
+ }
- if (l)
- *(l+1) = 0;
- else
- *s = 0;
+ if (left <= 4) {
+ size_t n = MIN(left-1, 3U);
+ memcpy(k, "...", n);
+ k[n] = 0;
+ } else
+ *k = 0;
- return s;
-}
+ fclose(f);
-char *delete_chars(char *s, const char *bad) {
- char *f, *t;
+ /* Kernel threads have no argv[] */
+ if (r[0] == 0) {
+ char *t;
+ int h;
- /* Drops all whitespace, regardless where in the string */
+ free(r);
- for (f = s, t = s; *f; f++) {
- if (strchr(bad, *f))
- continue;
+ if ((h = get_process_name(pid, &t)) < 0)
+ return h;
- *(t++) = *f;
- }
+ h = asprintf(&r, "[%s]", t);
+ free(t);
- *t = 0;
+ if (h < 0)
+ return -ENOMEM;
+ }
- return s;
+ *line = r;
+ return 0;
}
-char *file_in_same_dir(const char *path, const char *filename) {
- char *e, *r;
- size_t k;
+char *strnappend(const char *s, const char *suffix, size_t b) {
+ size_t a;
+ char *r;
- assert(path);
- assert(filename);
+ if (!s && !suffix)
+ return strdup("");
- /* This removes the last component of path and appends
- * filename, unless the latter is absolute anyway or the
- * former isn't */
+ if (!s)
+ return strndup(suffix, b);
- if (path_is_absolute(filename))
- return strdup(filename);
+ if (!suffix)
+ return strdup(s);
- if (!(e = strrchr(path, '/')))
- return strdup(filename);
+ assert(s);
+ assert(suffix);
- k = strlen(filename);
- if (!(r = new(char, e-path+1+k+1)))
+ a = strlen(s);
+
+ if (!(r = new(char, a+b+1)))
return NULL;
- memcpy(r, path, e-path+1);
- memcpy(r+(e-path)+1, filename, k+1);
+ memcpy(r, s, a);
+ memcpy(r+a, suffix, b);
+ r[a+b] = 0;
return r;
}
-int safe_mkdir(const char *path, mode_t mode, uid_t uid, gid_t gid) {
- struct stat st;
+char *strappend(const char *s, const char *suffix) {
+ return strnappend(s, suffix, suffix ? strlen(suffix) : 0);
+}
- if (mkdir(path, mode) >= 0)
- if (chmod_and_chown(path, mode, uid, gid) < 0)
- return -errno;
+int readlink_malloc(const char *p, char **r) {
+ size_t l = 100;
- if (lstat(path, &st) < 0)
- return -errno;
+ assert(p);
+ assert(r);
- if ((st.st_mode & 0777) != mode ||
- st.st_uid != uid ||
- st.st_gid != gid ||
- !S_ISDIR(st.st_mode)) {
- errno = EEXIST;
- return -errno;
+ for (;;) {
+ char *c;
+ ssize_t n;
+
+ if (!(c = new(char, l)))
+ return -ENOMEM;
+
+ if ((n = readlink(p, c, l-1)) < 0) {
+ int ret = -errno;
+ free(c);
+ return ret;
+ }
+
+ if ((size_t) n < l-1) {
+ c[n] = 0;
+ *r = c;
+ return 0;
+ }
+
+ free(c);
+ l *= 2;
}
+}
+
+int readlink_and_make_absolute(const char *p, char **r) {
+ char *target, *k;
+ int j;
+
+ assert(p);
+ assert(r);
+
+ if ((j = readlink_malloc(p, &target)) < 0)
+ return j;
+
+ k = file_in_same_dir(p, target);
+ free(target);
+
+ if (!k)
+ return -ENOMEM;
+ *r = k;
return 0;
}
+int readlink_and_canonicalize(const char *p, char **r) {
+ char *t, *s;
+ int j;
-int mkdir_parents(const char *path, mode_t mode) {
- const char *p, *e;
+ assert(p);
+ assert(r);
- assert(path);
+ j = readlink_and_make_absolute(p, &t);
+ if (j < 0)
+ return j;
- /* Creates every parent directory in the path except the last
- * component. */
+ s = canonicalize_file_name(t);
+ if (s) {
+ free(t);
+ *r = s;
+ } else
+ *r = t;
- p = path + strspn(path, "/");
- for (;;) {
- int r;
- char *t;
+ path_kill_slashes(*r);
- e = p + strcspn(p, "/");
- p = e + strspn(e, "/");
+ return 0;
+}
- /* Is this the last component? If so, then we're
- * done */
- if (*p == 0)
- return 0;
+int parent_of_path(const char *path, char **_r) {
+ const char *e, *a = NULL, *b = NULL, *p;
+ char *r;
+ bool slash = false;
- if (!(t = strndup(path, e - path)))
- return -ENOMEM;
+ assert(path);
+ assert(_r);
- r = mkdir(t, mode);
+ if (!*path)
+ return -EINVAL;
- free(t);
+ for (e = path; *e; e++) {
- if (r < 0 && errno != EEXIST)
- return -errno;
+ if (!slash && *e == '/') {
+ a = b;
+ b = e;
+ slash = true;
+ } else if (slash && *e != '/')
+ slash = false;
}
-}
-int mkdir_p(const char *path, mode_t mode) {
- int r;
+ if (*(e-1) == '/')
+ p = a;
+ else
+ p = b;
- /* Like mkdir -p */
+ if (!p)
+ return -EINVAL;
- if ((r = mkdir_parents(path, mode)) < 0)
- return r;
+ if (p == path)
+ r = strdup("/");
+ else
+ r = strndup(path, p-path);
- if (mkdir(path, mode) < 0)
- return -errno;
+ if (!r)
+ return -ENOMEM;
+ *_r = r;
return 0;
}
-int rmdir_parents(const char *path, const char *stop) {
- size_t l;
- int r = 0;
- assert(path);
- assert(stop);
+char *file_name_from_path(const char *p) {
+ char *r;
- l = strlen(path);
+ assert(p);
- /* Skip trailing slashes */
- while (l > 0 && path[l-1] == '/')
- l--;
+ if ((r = strrchr(p, '/')))
+ return r + 1;
- while (l > 0) {
- char *t;
+ return (char*) p;
+}
- /* Skip last component */
- while (l > 0 && path[l-1] != '/')
- l--;
+bool path_is_absolute(const char *p) {
+ assert(p);
- /* Skip trailing slashes */
- while (l > 0 && path[l-1] == '/')
- l--;
+ return p[0] == '/';
+}
- if (l <= 0)
- break;
+bool is_path(const char *p) {
- if (!(t = strndup(path, l)))
- return -ENOMEM;
+ return !!strchr(p, '/');
+}
- if (path_startswith(stop, t)) {
- free(t);
- return 0;
- }
+char *path_make_absolute(const char *p, const char *prefix) {
+ assert(p);
- r = rmdir(t);
- free(t);
+ /* Makes every item in the list an absolute path by prepending
+ * the prefix, if specified and necessary */
- if (r < 0)
- if (errno != ENOENT)
- return -errno;
- }
+ if (path_is_absolute(p) || !prefix)
+ return strdup(p);
- return 0;
+ return join(prefix, "/", p, NULL);
}
+char *path_make_absolute_cwd(const char *p) {
+ char *cwd, *r;
-char hexchar(int x) {
- static const char table[16] = "0123456789abcdef";
+ assert(p);
- return table[x & 15];
+ /* Similar to path_make_absolute(), but prefixes with the
+ * current working directory. */
+
+ if (path_is_absolute(p))
+ return strdup(p);
+
+ if (!(cwd = get_current_dir_name()))
+ return NULL;
+
+ r = path_make_absolute(p, cwd);
+ free(cwd);
+
+ return r;
}
-int unhexchar(char c) {
+char **strv_path_make_absolute_cwd(char **l) {
+ char **s;
- if (c >= '0' && c <= '9')
- return c - '0';
+ /* Goes through every item in the string list and makes it
+ * absolute. This works in place and won't rollback any
+ * changes on failure. */
- if (c >= 'a' && c <= 'f')
- return c - 'a' + 10;
+ STRV_FOREACH(s, l) {
+ char *t;
- if (c >= 'A' && c <= 'F')
- return c - 'A' + 10;
+ if (!(t = path_make_absolute_cwd(*s)))
+ return NULL;
- return -1;
-}
+ free(*s);
+ *s = t;
+ }
-char octchar(int x) {
- return '0' + (x & 7);
+ return l;
}
-int unoctchar(char c) {
+char **strv_path_canonicalize(char **l) {
+ char **s;
+ unsigned k = 0;
+ bool enomem = false;
- if (c >= '0' && c <= '7')
- return c - '0';
+ if (strv_isempty(l))
+ return l;
- return -1;
-}
+ /* Goes through every item in the string list and canonicalize
+ * the path. This works in place and won't rollback any
+ * changes on failure. */
-char decchar(int x) {
- return '0' + (x % 10);
-}
+ STRV_FOREACH(s, l) {
+ char *t, *u;
-int undecchar(char c) {
+ t = path_make_absolute_cwd(*s);
+ free(*s);
- if (c >= '0' && c <= '9')
- return c - '0';
+ if (!t) {
+ enomem = true;
+ continue;
+ }
- return -1;
-}
+ errno = 0;
+ u = canonicalize_file_name(t);
+ free(t);
-char *cescape(const char *s) {
- char *r, *t;
- const char *f;
+ if (!u) {
+ if (errno == ENOMEM || !errno)
+ enomem = true;
- assert(s);
+ continue;
+ }
- /* Does C style string escaping. */
+ l[k++] = u;
+ }
- if (!(r = new(char, strlen(s)*4 + 1)))
+ l[k] = NULL;
+
+ if (enomem)
return NULL;
- for (f = s, t = r; *f; f++)
+ return l;
+}
- switch (*f) {
+char **strv_path_remove_empty(char **l) {
+ char **f, **t;
- case '\a':
- *(t++) = '\\';
- *(t++) = 'a';
- break;
- case '\b':
- *(t++) = '\\';
- *(t++) = 'b';
- break;
- case '\f':
- *(t++) = '\\';
- *(t++) = 'f';
- break;
- case '\n':
- *(t++) = '\\';
- *(t++) = 'n';
+ if (!l)
+ return NULL;
+
+ for (f = t = l; *f; f++) {
+
+ if (dir_is_empty(*f) > 0) {
+ free(*f);
+ continue;
+ }
+
+ *(t++) = *f;
+ }
+
+ *t = NULL;
+ return l;
+}
+
+int reset_all_signal_handlers(void) {
+ int sig;
+
+ for (sig = 1; sig < _NSIG; sig++) {
+ struct sigaction sa;
+
+ if (sig == SIGKILL || sig == SIGSTOP)
+ continue;
+
+ zero(sa);
+ sa.sa_handler = SIG_DFL;
+ sa.sa_flags = SA_RESTART;
+
+ /* On Linux the first two RT signals are reserved by
+ * glibc, and sigaction() will return EINVAL for them. */
+ if ((sigaction(sig, &sa, NULL) < 0))
+ if (errno != EINVAL)
+ return -errno;
+ }
+
+ return 0;
+}
+
+char *strstrip(char *s) {
+ char *e;
+
+ /* Drops trailing whitespace. Modifies the string in
+ * place. Returns pointer to first non-space character */
+
+ s += strspn(s, WHITESPACE);
+
+ for (e = strchr(s, 0); e > s; e --)
+ if (!strchr(WHITESPACE, e[-1]))
break;
- case '\r':
- *(t++) = '\\';
- *(t++) = 'r';
+
+ *e = 0;
+
+ return s;
+}
+
+char *delete_chars(char *s, const char *bad) {
+ char *f, *t;
+
+ /* Drops all whitespace, regardless where in the string */
+
+ for (f = s, t = s; *f; f++) {
+ if (strchr(bad, *f))
+ continue;
+
+ *(t++) = *f;
+ }
+
+ *t = 0;
+
+ return s;
+}
+
+char *file_in_same_dir(const char *path, const char *filename) {
+ char *e, *r;
+ size_t k;
+
+ assert(path);
+ assert(filename);
+
+ /* This removes the last component of path and appends
+ * filename, unless the latter is absolute anyway or the
+ * former isn't */
+
+ if (path_is_absolute(filename))
+ return strdup(filename);
+
+ if (!(e = strrchr(path, '/')))
+ return strdup(filename);
+
+ k = strlen(filename);
+ if (!(r = new(char, e-path+1+k+1)))
+ return NULL;
+
+ memcpy(r, path, e-path+1);
+ memcpy(r+(e-path)+1, filename, k+1);
+
+ return r;
+}
+
+int safe_mkdir(const char *path, mode_t mode, uid_t uid, gid_t gid) {
+ struct stat st;
+
+ if (label_mkdir(path, mode) >= 0)
+ if (chmod_and_chown(path, mode, uid, gid) < 0)
+ return -errno;
+
+ if (lstat(path, &st) < 0)
+ return -errno;
+
+ if ((st.st_mode & 0777) != mode ||
+ st.st_uid != uid ||
+ st.st_gid != gid ||
+ !S_ISDIR(st.st_mode)) {
+ errno = EEXIST;
+ return -errno;
+ }
+
+ return 0;
+}
+
+
+int mkdir_parents(const char *path, mode_t mode) {
+ const char *p, *e;
+
+ assert(path);
+
+ /* Creates every parent directory in the path except the last
+ * component. */
+
+ p = path + strspn(path, "/");
+ for (;;) {
+ int r;
+ char *t;
+
+ e = p + strcspn(p, "/");
+ p = e + strspn(e, "/");
+
+ /* Is this the last component? If so, then we're
+ * done */
+ if (*p == 0)
+ return 0;
+
+ if (!(t = strndup(path, e - path)))
+ return -ENOMEM;
+
+ r = label_mkdir(t, mode);
+ free(t);
+
+ if (r < 0 && errno != EEXIST)
+ return -errno;
+ }
+}
+
+int mkdir_p(const char *path, mode_t mode) {
+ int r;
+
+ /* Like mkdir -p */
+
+ if ((r = mkdir_parents(path, mode)) < 0)
+ return r;
+
+ if (label_mkdir(path, mode) < 0 && errno != EEXIST)
+ return -errno;
+
+ return 0;
+}
+
+int rmdir_parents(const char *path, const char *stop) {
+ size_t l;
+ int r = 0;
+
+ assert(path);
+ assert(stop);
+
+ l = strlen(path);
+
+ /* Skip trailing slashes */
+ while (l > 0 && path[l-1] == '/')
+ l--;
+
+ while (l > 0) {
+ char *t;
+
+ /* Skip last component */
+ while (l > 0 && path[l-1] != '/')
+ l--;
+
+ /* Skip trailing slashes */
+ while (l > 0 && path[l-1] == '/')
+ l--;
+
+ if (l <= 0)
break;
- case '\t':
- *(t++) = '\\';
- *(t++) = 't';
+
+ if (!(t = strndup(path, l)))
+ return -ENOMEM;
+
+ if (path_startswith(stop, t)) {
+ free(t);
+ return 0;
+ }
+
+ r = rmdir(t);
+ free(t);
+
+ if (r < 0)
+ if (errno != ENOENT)
+ return -errno;
+ }
+
+ return 0;
+}
+
+
+char hexchar(int x) {
+ static const char table[16] = "0123456789abcdef";
+
+ return table[x & 15];
+}
+
+int unhexchar(char c) {
+
+ if (c >= '0' && c <= '9')
+ return c - '0';
+
+ if (c >= 'a' && c <= 'f')
+ return c - 'a' + 10;
+
+ if (c >= 'A' && c <= 'F')
+ return c - 'A' + 10;
+
+ return -1;
+}
+
+char octchar(int x) {
+ return '0' + (x & 7);
+}
+
+int unoctchar(char c) {
+
+ if (c >= '0' && c <= '7')
+ return c - '0';
+
+ return -1;
+}
+
+char decchar(int x) {
+ return '0' + (x % 10);
+}
+
+int undecchar(char c) {
+
+ if (c >= '0' && c <= '9')
+ return c - '0';
+
+ return -1;
+}
+
+char *cescape(const char *s) {
+ char *r, *t;
+ const char *f;
+
+ assert(s);
+
+ /* Does C style string escaping. */
+
+ if (!(r = new(char, strlen(s)*4 + 1)))
+ return NULL;
+
+ for (f = s, t = r; *f; f++)
+
+ switch (*f) {
+
+ case '\a':
+ *(t++) = '\\';
+ *(t++) = 'a';
+ break;
+ case '\b':
+ *(t++) = '\\';
+ *(t++) = 'b';
+ break;
+ case '\f':
+ *(t++) = '\\';
+ *(t++) = 'f';
+ break;
+ case '\n':
+ *(t++) = '\\';
+ *(t++) = 'n';
+ break;
+ case '\r':
+ *(t++) = '\\';
+ *(t++) = 'r';
+ break;
+ case '\t':
+ *(t++) = '\\';
+ *(t++) = 't';
+ break;
+ case '\v':
+ *(t++) = '\\';
+ *(t++) = 'v';
+ break;
+ case '\\':
+ *(t++) = '\\';
+ *(t++) = '\\';
+ break;
+ case '"':
+ *(t++) = '\\';
+ *(t++) = '"';
+ break;
+ case '\'':
+ *(t++) = '\\';
+ *(t++) = '\'';
+ break;
+
+ default:
+ /* For special chars we prefer octal over
+ * hexadecimal encoding, simply because glib's
+ * g_strescape() does the same */
+ if ((*f < ' ') || (*f >= 127)) {
+ *(t++) = '\\';
+ *(t++) = octchar((unsigned char) *f >> 6);
+ *(t++) = octchar((unsigned char) *f >> 3);
+ *(t++) = octchar((unsigned char) *f);
+ } else
+ *(t++) = *f;
+ break;
+ }
+
+ *t = 0;
+
+ return r;
+}
+
+char *cunescape_length(const char *s, size_t length) {
+ char *r, *t;
+ const char *f;
+
+ assert(s);
+
+ /* Undoes C style string escaping */
+
+ if (!(r = new(char, length+1)))
+ return r;
+
+ for (f = s, t = r; f < s + length; f++) {
+
+ if (*f != '\\') {
+ *(t++) = *f;
+ continue;
+ }
+
+ f++;
+
+ switch (*f) {
+
+ case 'a':
+ *(t++) = '\a';
+ break;
+ case 'b':
+ *(t++) = '\b';
+ break;
+ case 'f':
+ *(t++) = '\f';
+ break;
+ case 'n':
+ *(t++) = '\n';
+ break;
+ case 'r':
+ *(t++) = '\r';
+ break;
+ case 't':
+ *(t++) = '\t';
+ break;
+ case 'v':
+ *(t++) = '\v';
+ break;
+ case '\\':
+ *(t++) = '\\';
+ break;
+ case '"':
+ *(t++) = '"';
+ break;
+ case '\'':
+ *(t++) = '\'';
+ break;
+
+ case 's':
+ /* This is an extension of the XDG syntax files */
+ *(t++) = ' ';
+ break;
+
+ case 'x': {
+ /* hexadecimal encoding */
+ int a, b;
+
+ if ((a = unhexchar(f[1])) < 0 ||
+ (b = unhexchar(f[2])) < 0) {
+ /* Invalid escape code, let's take it literal then */
+ *(t++) = '\\';
+ *(t++) = 'x';
+ } else {
+ *(t++) = (char) ((a << 4) | b);
+ f += 2;
+ }
+
+ break;
+ }
+
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7': {
+ /* octal encoding */
+ int a, b, c;
+
+ if ((a = unoctchar(f[0])) < 0 ||
+ (b = unoctchar(f[1])) < 0 ||
+ (c = unoctchar(f[2])) < 0) {
+ /* Invalid escape code, let's take it literal then */
+ *(t++) = '\\';
+ *(t++) = f[0];
+ } else {
+ *(t++) = (char) ((a << 6) | (b << 3) | c);
+ f += 2;
+ }
+
+ break;
+ }
+
+ case 0:
+ /* premature end of string.*/
+ *(t++) = '\\';
+ goto finish;
+
+ default:
+ /* Invalid escape code, let's take it literal then */
+ *(t++) = '\\';
+ *(t++) = *f;
+ break;
+ }
+ }
+
+finish:
+ *t = 0;
+ return r;
+}
+
+char *cunescape(const char *s) {
+ return cunescape_length(s, strlen(s));
+}
+
+char *xescape(const char *s, const char *bad) {
+ char *r, *t;
+ const char *f;
+
+ /* Escapes all chars in bad, in addition to \ and all special
+ * chars, in \xFF style escaping. May be reversed with
+ * cunescape. */
+
+ if (!(r = new(char, strlen(s)*4+1)))
+ return NULL;
+
+ for (f = s, t = r; *f; f++) {
+
+ if ((*f < ' ') || (*f >= 127) ||
+ (*f == '\\') || strchr(bad, *f)) {
+ *(t++) = '\\';
+ *(t++) = 'x';
+ *(t++) = hexchar(*f >> 4);
+ *(t++) = hexchar(*f);
+ } else
+ *(t++) = *f;
+ }
+
+ *t = 0;
+
+ return r;
+}
+
+char *bus_path_escape(const char *s) {
+ char *r, *t;
+ const char *f;
+
+ assert(s);
+
+ /* Escapes all chars that D-Bus' object path cannot deal
+ * with. Can be reverse with bus_path_unescape() */
+
+ if (!(r = new(char, strlen(s)*3+1)))
+ return NULL;
+
+ for (f = s, t = r; *f; f++) {
+
+ if (!(*f >= 'A' && *f <= 'Z') &&
+ !(*f >= 'a' && *f <= 'z') &&
+ !(*f >= '0' && *f <= '9')) {
+ *(t++) = '_';
+ *(t++) = hexchar(*f >> 4);
+ *(t++) = hexchar(*f);
+ } else
+ *(t++) = *f;
+ }
+
+ *t = 0;
+
+ return r;
+}
+
+char *bus_path_unescape(const char *f) {
+ char *r, *t;
+
+ assert(f);
+
+ if (!(r = strdup(f)))
+ return NULL;
+
+ for (t = r; *f; f++) {
+
+ if (*f == '_') {
+ int a, b;
+
+ if ((a = unhexchar(f[1])) < 0 ||
+ (b = unhexchar(f[2])) < 0) {
+ /* Invalid escape code, let's take it literal then */
+ *(t++) = '_';
+ } else {
+ *(t++) = (char) ((a << 4) | b);
+ f += 2;
+ }
+ } else
+ *(t++) = *f;
+ }
+
+ *t = 0;
+
+ return r;
+}
+
+char *path_kill_slashes(char *path) {
+ char *f, *t;
+ bool slash = false;
+
+ /* Removes redundant inner and trailing slashes. Modifies the
+ * passed string in-place.
+ *
+ * ///foo///bar/ becomes /foo/bar
+ */
+
+ for (f = path, t = path; *f; f++) {
+
+ if (*f == '/') {
+ slash = true;
+ continue;
+ }
+
+ if (slash) {
+ slash = false;
+ *(t++) = '/';
+ }
+
+ *(t++) = *f;
+ }
+
+ /* Special rule, if we are talking of the root directory, a
+ trailing slash is good */
+
+ if (t == path && slash)
+ *(t++) = '/';
+
+ *t = 0;
+ return path;
+}
+
+bool path_startswith(const char *path, const char *prefix) {
+ assert(path);
+ assert(prefix);
+
+ if ((path[0] == '/') != (prefix[0] == '/'))
+ return false;
+
+ for (;;) {
+ size_t a, b;
+
+ path += strspn(path, "/");
+ prefix += strspn(prefix, "/");
+
+ if (*prefix == 0)
+ return true;
+
+ if (*path == 0)
+ return false;
+
+ a = strcspn(path, "/");
+ b = strcspn(prefix, "/");
+
+ if (a != b)
+ return false;
+
+ if (memcmp(path, prefix, a) != 0)
+ return false;
+
+ path += a;
+ prefix += b;
+ }
+}
+
+bool path_equal(const char *a, const char *b) {
+ assert(a);
+ assert(b);
+
+ if ((a[0] == '/') != (b[0] == '/'))
+ return false;
+
+ for (;;) {
+ size_t j, k;
+
+ a += strspn(a, "/");
+ b += strspn(b, "/");
+
+ if (*a == 0 && *b == 0)
+ return true;
+
+ if (*a == 0 || *b == 0)
+ return false;
+
+ j = strcspn(a, "/");
+ k = strcspn(b, "/");
+
+ if (j != k)
+ return false;
+
+ if (memcmp(a, b, j) != 0)
+ return false;
+
+ a += j;
+ b += k;
+ }
+}
+
+char *ascii_strlower(char *t) {
+ char *p;
+
+ assert(t);
+
+ for (p = t; *p; p++)
+ if (*p >= 'A' && *p <= 'Z')
+ *p = *p - 'A' + 'a';
+
+ return t;
+}
+
+bool ignore_file(const char *filename) {
+ assert(filename);
+
+ return
+ filename[0] == '.' ||
+ streq(filename, "lost+found") ||
+ streq(filename, "aquota.user") ||
+ streq(filename, "aquota.group") ||
+ endswith(filename, "~") ||
+ endswith(filename, ".rpmnew") ||
+ endswith(filename, ".rpmsave") ||
+ endswith(filename, ".rpmorig") ||
+ endswith(filename, ".dpkg-old") ||
+ endswith(filename, ".dpkg-new") ||
+ endswith(filename, ".swp");
+}
+
+int fd_nonblock(int fd, bool nonblock) {
+ int flags;
+
+ assert(fd >= 0);
+
+ if ((flags = fcntl(fd, F_GETFL, 0)) < 0)
+ return -errno;
+
+ if (nonblock)
+ flags |= O_NONBLOCK;
+ else
+ flags &= ~O_NONBLOCK;
+
+ if (fcntl(fd, F_SETFL, flags) < 0)
+ return -errno;
+
+ return 0;
+}
+
+int fd_cloexec(int fd, bool cloexec) {
+ int flags;
+
+ assert(fd >= 0);
+
+ if ((flags = fcntl(fd, F_GETFD, 0)) < 0)
+ return -errno;
+
+ if (cloexec)
+ flags |= FD_CLOEXEC;
+ else
+ flags &= ~FD_CLOEXEC;
+
+ if (fcntl(fd, F_SETFD, flags) < 0)
+ return -errno;
+
+ return 0;
+}
+
+int close_all_fds(const int except[], unsigned n_except) {
+ DIR *d;
+ struct dirent *de;
+ int r = 0;
+
+ if (!(d = opendir("/proc/self/fd")))
+ return -errno;
+
+ while ((de = readdir(d))) {
+ int fd = -1;
+
+ if (ignore_file(de->d_name))
+ continue;
+
+ if (safe_atoi(de->d_name, &fd) < 0)
+ /* Let's better ignore this, just in case */
+ continue;
+
+ if (fd < 3)
+ continue;
+
+ if (fd == dirfd(d))
+ continue;
+
+ if (except) {
+ bool found;
+ unsigned i;
+
+ found = false;
+ for (i = 0; i < n_except; i++)
+ if (except[i] == fd) {
+ found = true;
+ break;
+ }
+
+ if (found)
+ continue;
+ }
+
+ if (close_nointr(fd) < 0) {
+ /* Valgrind has its own FD and doesn't want to have it closed */
+ if (errno != EBADF && r == 0)
+ r = -errno;
+ }
+ }
+
+ closedir(d);
+ return r;
+}
+
+bool chars_intersect(const char *a, const char *b) {
+ const char *p;
+
+ /* Returns true if any of the chars in a are in b. */
+ for (p = a; *p; p++)
+ if (strchr(b, *p))
+ return true;
+
+ return false;
+}
+
+char *format_timestamp(char *buf, size_t l, usec_t t) {
+ struct tm tm;
+ time_t sec;
+
+ assert(buf);
+ assert(l > 0);
+
+ if (t <= 0)
+ return NULL;
+
+ sec = (time_t) (t / USEC_PER_SEC);
+
+ if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0)
+ return NULL;
+
+ return buf;
+}
+
+char *format_timestamp_pretty(char *buf, size_t l, usec_t t) {
+ usec_t n, d;
+
+ n = now(CLOCK_REALTIME);
+
+ if (t <= 0 || t > n || t + USEC_PER_DAY*7 <= t)
+ return NULL;
+
+ d = n - t;
+
+ if (d >= USEC_PER_YEAR)
+ snprintf(buf, l, "%llu years and %llu months ago",
+ (unsigned long long) (d / USEC_PER_YEAR),
+ (unsigned long long) ((d % USEC_PER_YEAR) / USEC_PER_MONTH));
+ else if (d >= USEC_PER_MONTH)
+ snprintf(buf, l, "%llu months and %llu days ago",
+ (unsigned long long) (d / USEC_PER_MONTH),
+ (unsigned long long) ((d % USEC_PER_MONTH) / USEC_PER_DAY));
+ else if (d >= USEC_PER_WEEK)
+ snprintf(buf, l, "%llu weeks and %llu days ago",
+ (unsigned long long) (d / USEC_PER_WEEK),
+ (unsigned long long) ((d % USEC_PER_WEEK) / USEC_PER_DAY));
+ else if (d >= 2*USEC_PER_DAY)
+ snprintf(buf, l, "%llu days ago", (unsigned long long) (d / USEC_PER_DAY));
+ else if (d >= 25*USEC_PER_HOUR)
+ snprintf(buf, l, "1 day and %lluh ago",
+ (unsigned long long) ((d - USEC_PER_DAY) / USEC_PER_HOUR));
+ else if (d >= 6*USEC_PER_HOUR)
+ snprintf(buf, l, "%lluh ago",
+ (unsigned long long) (d / USEC_PER_HOUR));
+ else if (d >= USEC_PER_HOUR)
+ snprintf(buf, l, "%lluh %llumin ago",
+ (unsigned long long) (d / USEC_PER_HOUR),
+ (unsigned long long) ((d % USEC_PER_HOUR) / USEC_PER_MINUTE));
+ else if (d >= 5*USEC_PER_MINUTE)
+ snprintf(buf, l, "%llumin ago",
+ (unsigned long long) (d / USEC_PER_MINUTE));
+ else if (d >= USEC_PER_MINUTE)
+ snprintf(buf, l, "%llumin %llus ago",
+ (unsigned long long) (d / USEC_PER_MINUTE),
+ (unsigned long long) ((d % USEC_PER_MINUTE) / USEC_PER_SEC));
+ else if (d >= USEC_PER_SEC)
+ snprintf(buf, l, "%llus ago",
+ (unsigned long long) (d / USEC_PER_SEC));
+ else if (d >= USEC_PER_MSEC)
+ snprintf(buf, l, "%llums ago",
+ (unsigned long long) (d / USEC_PER_MSEC));
+ else if (d > 0)
+ snprintf(buf, l, "%lluus ago",
+ (unsigned long long) d);
+ else
+ snprintf(buf, l, "now");
+
+ buf[l-1] = 0;
+ return buf;
+}
+
+char *format_timespan(char *buf, size_t l, usec_t t) {
+ static const struct {
+ const char *suffix;
+ usec_t usec;
+ } table[] = {
+ { "w", USEC_PER_WEEK },
+ { "d", USEC_PER_DAY },
+ { "h", USEC_PER_HOUR },
+ { "min", USEC_PER_MINUTE },
+ { "s", USEC_PER_SEC },
+ { "ms", USEC_PER_MSEC },
+ { "us", 1 },
+ };
+
+ unsigned i;
+ char *p = buf;
+
+ assert(buf);
+ assert(l > 0);
+
+ if (t == (usec_t) -1)
+ return NULL;
+
+ if (t == 0) {
+ snprintf(p, l, "0");
+ p[l-1] = 0;
+ return p;
+ }
+
+ /* The result of this function can be parsed with parse_usec */
+
+ for (i = 0; i < ELEMENTSOF(table); i++) {
+ int k;
+ size_t n;
+
+ if (t < table[i].usec)
+ continue;
+
+ if (l <= 1)
+ break;
+
+ k = snprintf(p, l, "%s%llu%s", p > buf ? " " : "", (unsigned long long) (t / table[i].usec), table[i].suffix);
+ n = MIN((size_t) k, l);
+
+ l -= n;
+ p += n;
+
+ t %= table[i].usec;
+ }
+
+ *p = 0;
+
+ return buf;
+}
+
+bool fstype_is_network(const char *fstype) {
+ static const char * const table[] = {
+ "cifs",
+ "smbfs",
+ "ncpfs",
+ "nfs",
+ "nfs4",
+ "gfs",
+ "gfs2"
+ };
+
+ unsigned i;
+
+ for (i = 0; i < ELEMENTSOF(table); i++)
+ if (streq(table[i], fstype))
+ return true;
+
+ return false;
+}
+
+int chvt(int vt) {
+ int fd, r = 0;
+
+ if ((fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0)
+ return -errno;
+
+ if (vt < 0) {
+ int tiocl[2] = {
+ TIOCL_GETKMSGREDIRECT,
+ 0
+ };
+
+ if (ioctl(fd, TIOCLINUX, tiocl) < 0)
+ return -errno;
+
+ vt = tiocl[0] <= 0 ? 1 : tiocl[0];
+ }
+
+ if (ioctl(fd, VT_ACTIVATE, vt) < 0)
+ r = -errno;
+
+ close_nointr_nofail(r);
+ return r;
+}
+
+int read_one_char(FILE *f, char *ret, bool *need_nl) {
+ struct termios old_termios, new_termios;
+ char c;
+ char line[LINE_MAX];
+
+ assert(f);
+ assert(ret);
+
+ if (tcgetattr(fileno(f), &old_termios) >= 0) {
+ new_termios = old_termios;
+
+ new_termios.c_lflag &= ~ICANON;
+ new_termios.c_cc[VMIN] = 1;
+ new_termios.c_cc[VTIME] = 0;
+
+ if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) {
+ size_t k;
+
+ k = fread(&c, 1, 1, f);
+
+ tcsetattr(fileno(f), TCSADRAIN, &old_termios);
+
+ if (k <= 0)
+ return -EIO;
+
+ if (need_nl)
+ *need_nl = c != '\n';
+
+ *ret = c;
+ return 0;
+ }
+ }
+
+ if (!(fgets(line, sizeof(line), f)))
+ return -EIO;
+
+ truncate_nl(line);
+
+ if (strlen(line) != 1)
+ return -EBADMSG;
+
+ if (need_nl)
+ *need_nl = false;
+
+ *ret = line[0];
+ return 0;
+}
+
+int ask(char *ret, const char *replies, const char *text, ...) {
+ bool on_tty;
+
+ assert(ret);
+ assert(replies);
+ assert(text);
+
+ on_tty = isatty(STDOUT_FILENO);
+
+ for (;;) {
+ va_list ap;
+ char c;
+ int r;
+ bool need_nl = true;
+
+ if (on_tty)
+ fputs("\x1B[1m", stdout);
+
+ va_start(ap, text);
+ vprintf(text, ap);
+ va_end(ap);
+
+ if (on_tty)
+ fputs("\x1B[0m", stdout);
+
+ fflush(stdout);
+
+ if ((r = read_one_char(stdin, &c, &need_nl)) < 0) {
+
+ if (r == -EBADMSG) {
+ puts("Bad input, please try again.");
+ continue;
+ }
+
+ putchar('\n');
+ return r;
+ }
+
+ if (need_nl)
+ putchar('\n');
+
+ if (strchr(replies, c)) {
+ *ret = c;
+ return 0;
+ }
+
+ puts("Read unexpected character, please try again.");
+ }
+}
+
+int reset_terminal_fd(int fd) {
+ struct termios termios;
+ int r = 0;
+ long arg;
+
+ /* Set terminal to some sane defaults */
+
+ assert(fd >= 0);
+
+ /* We leave locked terminal attributes untouched, so that
+ * Plymouth may set whatever it wants to set, and we don't
+ * interfere with that. */
+
+ /* Disable exclusive mode, just in case */
+ ioctl(fd, TIOCNXCL);
+
+ /* Enable console unicode mode */
+ arg = K_UNICODE;
+ ioctl(fd, KDSKBMODE, &arg);
+
+ if (tcgetattr(fd, &termios) < 0) {
+ r = -errno;
+ goto finish;
+ }
+
+ /* We only reset the stuff that matters to the software. How
+ * hardware is set up we don't touch assuming that somebody
+ * else will do that for us */
+
+ termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC);
+ termios.c_iflag |= ICRNL | IMAXBEL | IUTF8;
+ termios.c_oflag |= ONLCR;
+ termios.c_cflag |= CREAD;
+ termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE;
+
+ termios.c_cc[VINTR] = 03; /* ^C */
+ termios.c_cc[VQUIT] = 034; /* ^\ */
+ termios.c_cc[VERASE] = 0177;
+ termios.c_cc[VKILL] = 025; /* ^X */
+ termios.c_cc[VEOF] = 04; /* ^D */
+ termios.c_cc[VSTART] = 021; /* ^Q */
+ termios.c_cc[VSTOP] = 023; /* ^S */
+ termios.c_cc[VSUSP] = 032; /* ^Z */
+ termios.c_cc[VLNEXT] = 026; /* ^V */
+ termios.c_cc[VWERASE] = 027; /* ^W */
+ termios.c_cc[VREPRINT] = 022; /* ^R */
+ termios.c_cc[VEOL] = 0;
+ termios.c_cc[VEOL2] = 0;
+
+ termios.c_cc[VTIME] = 0;
+ termios.c_cc[VMIN] = 1;
+
+ if (tcsetattr(fd, TCSANOW, &termios) < 0)
+ r = -errno;
+
+finish:
+ /* Just in case, flush all crap out */
+ tcflush(fd, TCIOFLUSH);
+
+ return r;
+}
+
+int reset_terminal(const char *name) {
+ int fd, r;
+
+ fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
+ if (fd < 0)
+ return fd;
+
+ r = reset_terminal_fd(fd);
+ close_nointr_nofail(fd);
+
+ return r;
+}
+
+int open_terminal(const char *name, int mode) {
+ int fd, r;
+ unsigned c = 0;
+
+ /*
+ * If a TTY is in the process of being closed opening it might
+ * cause EIO. This is horribly awful, but unlikely to be
+ * changed in the kernel. Hence we work around this problem by
+ * retrying a couple of times.
+ *
+ * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245
+ */
+
+ for (;;) {
+ if ((fd = open(name, mode)) >= 0)
+ break;
+
+ if (errno != EIO)
+ return -errno;
+
+ if (c >= 20)
+ return -errno;
+
+ usleep(50 * USEC_PER_MSEC);
+ c++;
+ }
+
+ if (fd < 0)
+ return -errno;
+
+ if ((r = isatty(fd)) < 0) {
+ close_nointr_nofail(fd);
+ return -errno;
+ }
+
+ if (!r) {
+ close_nointr_nofail(fd);
+ return -ENOTTY;
+ }
+
+ return fd;
+}
+
+int flush_fd(int fd) {
+ struct pollfd pollfd;
+
+ zero(pollfd);
+ pollfd.fd = fd;
+ pollfd.events = POLLIN;
+
+ for (;;) {
+ char buf[LINE_MAX];
+ ssize_t l;
+ int r;
+
+ if ((r = poll(&pollfd, 1, 0)) < 0) {
+
+ if (errno == EINTR)
+ continue;
+
+ return -errno;
+ }
+
+ if (r == 0)
+ return 0;
+
+ if ((l = read(fd, buf, sizeof(buf))) < 0) {
+
+ if (errno == EINTR)
+ continue;
+
+ if (errno == EAGAIN)
+ return 0;
+
+ return -errno;
+ }
+
+ if (l <= 0)
+ return 0;
+ }
+}
+
+int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm) {
+ int fd = -1, notify = -1, r, wd = -1;
+
+ assert(name);
+
+ /* We use inotify to be notified when the tty is closed. We
+ * create the watch before checking if we can actually acquire
+ * it, so that we don't lose any event.
+ *
+ * Note: strictly speaking this actually watches for the
+ * device being closed, it does *not* really watch whether a
+ * tty loses its controlling process. However, unless some
+ * rogue process uses TIOCNOTTY on /dev/tty *after* closing
+ * its tty otherwise this will not become a problem. As long
+ * as the administrator makes sure not configure any service
+ * on the same tty as an untrusted user this should not be a
+ * problem. (Which he probably should not do anyway.) */
+
+ if (!fail && !force) {
+ if ((notify = inotify_init1(IN_CLOEXEC)) < 0) {
+ r = -errno;
+ goto fail;
+ }
+
+ if ((wd = inotify_add_watch(notify, name, IN_CLOSE)) < 0) {
+ r = -errno;
+ goto fail;
+ }
+ }
+
+ for (;;) {
+ if (notify >= 0)
+ if ((r = flush_fd(notify)) < 0)
+ goto fail;
+
+ /* We pass here O_NOCTTY only so that we can check the return
+ * value TIOCSCTTY and have a reliable way to figure out if we
+ * successfully became the controlling process of the tty */
+ if ((fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0)
+ return fd;
+
+ /* First, try to get the tty */
+ r = ioctl(fd, TIOCSCTTY, force);
+
+ /* Sometimes it makes sense to ignore TIOCSCTTY
+ * returning EPERM, i.e. when very likely we already
+ * are have this controlling terminal. */
+ if (r < 0 && errno == EPERM && ignore_tiocstty_eperm)
+ r = 0;
+
+ if (r < 0 && (force || fail || errno != EPERM)) {
+ r = -errno;
+ goto fail;
+ }
+
+ if (r >= 0)
+ break;
+
+ assert(!fail);
+ assert(!force);
+ assert(notify >= 0);
+
+ for (;;) {
+ uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX];
+ ssize_t l;
+ struct inotify_event *e;
+
+ if ((l = read(notify, &inotify_buffer, sizeof(inotify_buffer))) < 0) {
+
+ if (errno == EINTR)
+ continue;
+
+ r = -errno;
+ goto fail;
+ }
+
+ e = (struct inotify_event*) inotify_buffer;
+
+ while (l > 0) {
+ size_t step;
+
+ if (e->wd != wd || !(e->mask & IN_CLOSE)) {
+ r = -EIO;
+ goto fail;
+ }
+
+ step = sizeof(struct inotify_event) + e->len;
+ assert(step <= (size_t) l);
+
+ e = (struct inotify_event*) ((uint8_t*) e + step);
+ l -= step;
+ }
+
+ break;
+ }
+
+ /* We close the tty fd here since if the old session
+ * ended our handle will be dead. It's important that
+ * we do this after sleeping, so that we don't enter
+ * an endless loop. */
+ close_nointr_nofail(fd);
+ }
+
+ if (notify >= 0)
+ close_nointr_nofail(notify);
+
+ if ((r = reset_terminal_fd(fd)) < 0)
+ log_warning("Failed to reset terminal: %s", strerror(-r));
+
+ return fd;
+
+fail:
+ if (fd >= 0)
+ close_nointr_nofail(fd);
+
+ if (notify >= 0)
+ close_nointr_nofail(notify);
+
+ return r;
+}
+
+int release_terminal(void) {
+ int r = 0, fd;
+ struct sigaction sa_old, sa_new;
+
+ if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC)) < 0)
+ return -errno;
+
+ /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed
+ * by our own TIOCNOTTY */
+
+ zero(sa_new);
+ sa_new.sa_handler = SIG_IGN;
+ sa_new.sa_flags = SA_RESTART;
+ assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0);
+
+ if (ioctl(fd, TIOCNOTTY) < 0)
+ r = -errno;
+
+ assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0);
+
+ close_nointr_nofail(fd);
+ return r;
+}
+
+int sigaction_many(const struct sigaction *sa, ...) {
+ va_list ap;
+ int r = 0, sig;
+
+ va_start(ap, sa);
+ while ((sig = va_arg(ap, int)) > 0)
+ if (sigaction(sig, sa, NULL) < 0)
+ r = -errno;
+ va_end(ap);
+
+ return r;
+}
+
+int ignore_signals(int sig, ...) {
+ struct sigaction sa;
+ va_list ap;
+ int r = 0;
+
+ zero(sa);
+ sa.sa_handler = SIG_IGN;
+ sa.sa_flags = SA_RESTART;
+
+ if (sigaction(sig, &sa, NULL) < 0)
+ r = -errno;
+
+ va_start(ap, sig);
+ while ((sig = va_arg(ap, int)) > 0)
+ if (sigaction(sig, &sa, NULL) < 0)
+ r = -errno;
+ va_end(ap);
+
+ return r;
+}
+
+int default_signals(int sig, ...) {
+ struct sigaction sa;
+ va_list ap;
+ int r = 0;
+
+ zero(sa);
+ sa.sa_handler = SIG_DFL;
+ sa.sa_flags = SA_RESTART;
+
+ if (sigaction(sig, &sa, NULL) < 0)
+ r = -errno;
+
+ va_start(ap, sig);
+ while ((sig = va_arg(ap, int)) > 0)
+ if (sigaction(sig, &sa, NULL) < 0)
+ r = -errno;
+ va_end(ap);
+
+ return r;
+}
+
+int close_pipe(int p[]) {
+ int a = 0, b = 0;
+
+ assert(p);
+
+ if (p[0] >= 0) {
+ a = close_nointr(p[0]);
+ p[0] = -1;
+ }
+
+ if (p[1] >= 0) {
+ b = close_nointr(p[1]);
+ p[1] = -1;
+ }
+
+ return a < 0 ? a : b;
+}
+
+ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) {
+ uint8_t *p;
+ ssize_t n = 0;
+
+ assert(fd >= 0);
+ assert(buf);
+
+ p = buf;
+
+ while (nbytes > 0) {
+ ssize_t k;
+
+ if ((k = read(fd, p, nbytes)) <= 0) {
+
+ if (k < 0 && errno == EINTR)
+ continue;
+
+ if (k < 0 && errno == EAGAIN && do_poll) {
+ struct pollfd pollfd;
+
+ zero(pollfd);
+ pollfd.fd = fd;
+ pollfd.events = POLLIN;
+
+ if (poll(&pollfd, 1, -1) < 0) {
+ if (errno == EINTR)
+ continue;
+
+ return n > 0 ? n : -errno;
+ }
+
+ if (pollfd.revents != POLLIN)
+ return n > 0 ? n : -EIO;
+
+ continue;
+ }
+
+ return n > 0 ? n : (k < 0 ? -errno : 0);
+ }
+
+ p += k;
+ nbytes -= k;
+ n += k;
+ }
+
+ return n;
+}
+
+ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) {
+ const uint8_t *p;
+ ssize_t n = 0;
+
+ assert(fd >= 0);
+ assert(buf);
+
+ p = buf;
+
+ while (nbytes > 0) {
+ ssize_t k;
+
+ if ((k = write(fd, p, nbytes)) <= 0) {
+
+ if (k < 0 && errno == EINTR)
+ continue;
+
+ if (k < 0 && errno == EAGAIN && do_poll) {
+ struct pollfd pollfd;
+
+ zero(pollfd);
+ pollfd.fd = fd;
+ pollfd.events = POLLOUT;
+
+ if (poll(&pollfd, 1, -1) < 0) {
+ if (errno == EINTR)
+ continue;
+
+ return n > 0 ? n : -errno;
+ }
+
+ if (pollfd.revents != POLLOUT)
+ return n > 0 ? n : -EIO;
+
+ continue;
+ }
+
+ return n > 0 ? n : (k < 0 ? -errno : 0);
+ }
+
+ p += k;
+ nbytes -= k;
+ n += k;
+ }
+
+ return n;
+}
+
+int path_is_mount_point(const char *t) {
+ struct stat a, b;
+ char *parent;
+ int r;
+
+ if (lstat(t, &a) < 0) {
+ if (errno == ENOENT)
+ return 0;
+
+ return -errno;
+ }
+
+ if ((r = parent_of_path(t, &parent)) < 0)
+ return r;
+
+ r = lstat(parent, &b);
+ free(parent);
+
+ if (r < 0)
+ return -errno;
+
+ return a.st_dev != b.st_dev;
+}
+
+int parse_usec(const char *t, usec_t *usec) {
+ static const struct {
+ const char *suffix;
+ usec_t usec;
+ } table[] = {
+ { "sec", USEC_PER_SEC },
+ { "s", USEC_PER_SEC },
+ { "min", USEC_PER_MINUTE },
+ { "hr", USEC_PER_HOUR },
+ { "h", USEC_PER_HOUR },
+ { "d", USEC_PER_DAY },
+ { "w", USEC_PER_WEEK },
+ { "msec", USEC_PER_MSEC },
+ { "ms", USEC_PER_MSEC },
+ { "m", USEC_PER_MINUTE },
+ { "usec", 1ULL },
+ { "us", 1ULL },
+ { "", USEC_PER_SEC },
+ };
+
+ const char *p;
+ usec_t r = 0;
+
+ assert(t);
+ assert(usec);
+
+ p = t;
+ do {
+ long long l;
+ char *e;
+ unsigned i;
+
+ errno = 0;
+ l = strtoll(p, &e, 10);
+
+ if (errno != 0)
+ return -errno;
+
+ if (l < 0)
+ return -ERANGE;
+
+ if (e == p)
+ return -EINVAL;
+
+ e += strspn(e, WHITESPACE);
+
+ for (i = 0; i < ELEMENTSOF(table); i++)
+ if (startswith(e, table[i].suffix)) {
+ r += (usec_t) l * table[i].usec;
+ p = e + strlen(table[i].suffix);
+ break;
+ }
+
+ if (i >= ELEMENTSOF(table))
+ return -EINVAL;
+
+ } while (*p != 0);
+
+ *usec = r;
+
+ return 0;
+}
+
+int make_stdio(int fd) {
+ int r, s, t;
+
+ assert(fd >= 0);
+
+ r = dup2(fd, STDIN_FILENO);
+ s = dup2(fd, STDOUT_FILENO);
+ t = dup2(fd, STDERR_FILENO);
+
+ if (fd >= 3)
+ close_nointr_nofail(fd);
+
+ if (r < 0 || s < 0 || t < 0)
+ return -errno;
+
+ fd_cloexec(STDIN_FILENO, false);
+ fd_cloexec(STDOUT_FILENO, false);
+ fd_cloexec(STDERR_FILENO, false);
+
+ return 0;
+}
+
+int make_null_stdio(void) {
+ int null_fd;
+
+ if ((null_fd = open("/dev/null", O_RDWR|O_NOCTTY)) < 0)
+ return -errno;
+
+ return make_stdio(null_fd);
+}
+
+bool is_device_path(const char *path) {
+
+ /* Returns true on paths that refer to a device, either in
+ * sysfs or in /dev */
+
+ return
+ path_startswith(path, "/dev/") ||
+ path_startswith(path, "/sys/");
+}
+
+int dir_is_empty(const char *path) {
+ DIR *d;
+ int r;
+ struct dirent buf, *de;
+
+ if (!(d = opendir(path)))
+ return -errno;
+
+ for (;;) {
+ if ((r = readdir_r(d, &buf, &de)) > 0) {
+ r = -r;
break;
- case '\v':
- *(t++) = '\\';
- *(t++) = 'v';
+ }
+
+ if (!de) {
+ r = 1;
break;
- case '\\':
- *(t++) = '\\';
- *(t++) = '\\';
+ }
+
+ if (!ignore_file(de->d_name)) {
+ r = 0;
break;
- case '"':
- *(t++) = '\\';
- *(t++) = '"';
+ }
+ }
+
+ closedir(d);
+ return r;
+}
+
+unsigned long long random_ull(void) {
+ int fd;
+ uint64_t ull;
+ ssize_t r;
+
+ if ((fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY)) < 0)
+ goto fallback;
+
+ r = loop_read(fd, &ull, sizeof(ull), true);
+ close_nointr_nofail(fd);
+
+ if (r != sizeof(ull))
+ goto fallback;
+
+ return ull;
+
+fallback:
+ return random() * RAND_MAX + random();
+}
+
+void rename_process(const char name[8]) {
+ assert(name);
+
+ prctl(PR_SET_NAME, name);
+
+ /* This is a like a poor man's setproctitle(). The string
+ * passed should fit in 7 chars (i.e. the length of
+ * "systemd") */
+
+ if (program_invocation_name)
+ strncpy(program_invocation_name, name, strlen(program_invocation_name));
+
+ if (saved_argc > 0) {
+ int i;
+
+ if (saved_argv[0])
+ strncpy(saved_argv[0], name, strlen(saved_argv[0]));
+
+ for (i = 1; i < saved_argc; i++) {
+ if (!saved_argv[i])
+ break;
+
+ memset(saved_argv[i], 0, strlen(saved_argv[i]));
+ }
+ }
+}
+
+void sigset_add_many(sigset_t *ss, ...) {
+ va_list ap;
+ int sig;
+
+ assert(ss);
+
+ va_start(ap, ss);
+ while ((sig = va_arg(ap, int)) > 0)
+ assert_se(sigaddset(ss, sig) == 0);
+ va_end(ap);
+}
+
+char* gethostname_malloc(void) {
+ struct utsname u;
+
+ assert_se(uname(&u) >= 0);
+
+ if (u.nodename[0])
+ return strdup(u.nodename);
+
+ return strdup(u.sysname);
+}
+
+char* getlogname_malloc(void) {
+ uid_t uid;
+ long bufsize;
+ char *buf, *name;
+ struct passwd pwbuf, *pw = NULL;
+ struct stat st;
+
+ if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0)
+ uid = st.st_uid;
+ else
+ uid = getuid();
+
+ /* Shortcut things to avoid NSS lookups */
+ if (uid == 0)
+ return strdup("root");
+
+ if ((bufsize = sysconf(_SC_GETPW_R_SIZE_MAX)) <= 0)
+ bufsize = 4096;
+
+ if (!(buf = malloc(bufsize)))
+ return NULL;
+
+ if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) {
+ name = strdup(pw->pw_name);
+ free(buf);
+ return name;
+ }
+
+ free(buf);
+
+ if (asprintf(&name, "%lu", (unsigned long) uid) < 0)
+ return NULL;
+
+ return name;
+}
+
+int getttyname_malloc(int fd, char **r) {
+ char path[PATH_MAX], *c;
+ int k;
+
+ assert(r);
+
+ if ((k = ttyname_r(fd, path, sizeof(path))) != 0)
+ return -k;
+
+ char_array_0(path);
+
+ if (!(c = strdup(startswith(path, "/dev/") ? path + 5 : path)))
+ return -ENOMEM;
+
+ *r = c;
+ return 0;
+}
+
+int getttyname_harder(int fd, char **r) {
+ int k;
+ char *s;
+
+ if ((k = getttyname_malloc(fd, &s)) < 0)
+ return k;
+
+ if (streq(s, "tty")) {
+ free(s);
+ return get_ctty(0, NULL, r);
+ }
+
+ *r = s;
+ return 0;
+}
+
+int get_ctty_devnr(pid_t pid, dev_t *d) {
+ int k;
+ char line[LINE_MAX], *p, *fn;
+ unsigned long ttynr;
+ FILE *f;
+
+ if (asprintf(&fn, "/proc/%lu/stat", (unsigned long) (pid <= 0 ? getpid() : pid)) < 0)
+ return -ENOMEM;
+
+ f = fopen(fn, "re");
+ free(fn);
+ if (!f)
+ return -errno;
+
+ if (!fgets(line, sizeof(line), f)) {
+ k = -errno;
+ fclose(f);
+ return k;
+ }
+
+ fclose(f);
+
+ p = strrchr(line, ')');
+ if (!p)
+ return -EIO;
+
+ p++;
+
+ if (sscanf(p, " "
+ "%*c " /* state */
+ "%*d " /* ppid */
+ "%*d " /* pgrp */
+ "%*d " /* session */
+ "%lu ", /* ttynr */
+ &ttynr) != 1)
+ return -EIO;
+
+ *d = (dev_t) ttynr;
+ return 0;
+}
+
+int get_ctty(pid_t pid, dev_t *_devnr, char **r) {
+ int k;
+ char fn[PATH_MAX], *s, *b, *p;
+ dev_t devnr;
+
+ assert(r);
+
+ k = get_ctty_devnr(pid, &devnr);
+ if (k < 0)
+ return k;
+
+ snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr));
+ char_array_0(fn);
+
+ if ((k = readlink_malloc(fn, &s)) < 0) {
+
+ if (k != -ENOENT)
+ return k;
+
+ /* This is an ugly hack */
+ if (major(devnr) == 136) {
+ if (asprintf(&b, "pts/%lu", (unsigned long) minor(devnr)) < 0)
+ return -ENOMEM;
+
+ *r = b;
+ if (_devnr)
+ *_devnr = devnr;
+
+ return 0;
+ }
+
+ /* Probably something like the ptys which have no
+ * symlink in /dev/char. Let's return something
+ * vaguely useful. */
+
+ if (!(b = strdup(fn + 5)))
+ return -ENOMEM;
+
+ *r = b;
+ if (_devnr)
+ *_devnr = devnr;
+
+ return 0;
+ }
+
+ if (startswith(s, "/dev/"))
+ p = s + 5;
+ else if (startswith(s, "../"))
+ p = s + 3;
+ else
+ p = s;
+
+ b = strdup(p);
+ free(s);
+
+ if (!b)
+ return -ENOMEM;
+
+ *r = b;
+ if (_devnr)
+ *_devnr = devnr;
+
+ return 0;
+}
+
+static int rm_rf_children(int fd, bool only_dirs) {
+ DIR *d;
+ int ret = 0;
+
+ assert(fd >= 0);
+
+ /* This returns the first error we run into, but nevertheless
+ * tries to go on */
+
+ if (!(d = fdopendir(fd))) {
+ close_nointr_nofail(fd);
+
+ return errno == ENOENT ? 0 : -errno;
+ }
+
+ for (;;) {
+ struct dirent buf, *de;
+ bool is_dir;
+ int r;
+
+ if ((r = readdir_r(d, &buf, &de)) != 0) {
+ if (ret == 0)
+ ret = -r;
break;
- case '\'':
- *(t++) = '\\';
- *(t++) = '\'';
+ }
+
+ if (!de)
break;
- default:
- /* For special chars we prefer octal over
- * hexadecimal encoding, simply because glib's
- * g_strescape() does the same */
- if ((*f < ' ') || (*f >= 127)) {
- *(t++) = '\\';
- *(t++) = octchar((unsigned char) *f >> 6);
- *(t++) = octchar((unsigned char) *f >> 3);
- *(t++) = octchar((unsigned char) *f);
+ if (streq(de->d_name, ".") || streq(de->d_name, ".."))
+ continue;
+
+ if (de->d_type == DT_UNKNOWN) {
+ struct stat st;
+
+ if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
+ if (ret == 0 && errno != ENOENT)
+ ret = -errno;
+ continue;
+ }
+
+ is_dir = S_ISDIR(st.st_mode);
+ } else
+ is_dir = de->d_type == DT_DIR;
+
+ if (is_dir) {
+ int subdir_fd;
+
+ if ((subdir_fd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) {
+ if (ret == 0 && errno != ENOENT)
+ ret = -errno;
+ continue;
+ }
+
+ if ((r = rm_rf_children(subdir_fd, only_dirs)) < 0) {
+ if (ret == 0)
+ ret = r;
+ }
+
+ if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) {
+ if (ret == 0 && errno != ENOENT)
+ ret = -errno;
+ }
+ } else if (!only_dirs) {
+
+ if (unlinkat(fd, de->d_name, 0) < 0) {
+ if (ret == 0 && errno != ENOENT)
+ ret = -errno;
+ }
+ }
+ }
+
+ closedir(d);
+
+ return ret;
+}
+
+int rm_rf(const char *path, bool only_dirs, bool delete_root) {
+ int fd;
+ int r;
+
+ assert(path);
+
+ if ((fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) {
+
+ if (errno != ENOTDIR)
+ return -errno;
+
+ if (delete_root && !only_dirs)
+ if (unlink(path) < 0)
+ return -errno;
+
+ return 0;
+ }
+
+ r = rm_rf_children(fd, only_dirs);
+
+ if (delete_root)
+ if (rmdir(path) < 0) {
+ if (r == 0)
+ r = -errno;
+ }
+
+ return r;
+}
+
+int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) {
+ assert(path);
+
+ /* Under the assumption that we are running privileged we
+ * first change the access mode and only then hand out
+ * ownership to avoid a window where access is too open. */
+
+ if (chmod(path, mode) < 0)
+ return -errno;
+
+ if (chown(path, uid, gid) < 0)
+ return -errno;
+
+ return 0;
+}
+
+cpu_set_t* cpu_set_malloc(unsigned *ncpus) {
+ cpu_set_t *r;
+ unsigned n = 1024;
+
+ /* Allocates the cpuset in the right size */
+
+ for (;;) {
+ if (!(r = CPU_ALLOC(n)))
+ return NULL;
+
+ if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) {
+ CPU_ZERO_S(CPU_ALLOC_SIZE(n), r);
+
+ if (ncpus)
+ *ncpus = n;
+
+ return r;
+ }
+
+ CPU_FREE(r);
+
+ if (errno != EINVAL)
+ return NULL;
+
+ n *= 2;
+ }
+}
+
+void status_vprintf(const char *format, va_list ap) {
+ char *s = NULL;
+ int fd = -1;
+
+ assert(format);
+
+ /* This independent of logging, as status messages are
+ * optional and go exclusively to the console. */
+
+ if (vasprintf(&s, format, ap) < 0)
+ goto finish;
+
+ if ((fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0)
+ goto finish;
+
+ write(fd, s, strlen(s));
+
+finish:
+ free(s);
+
+ if (fd >= 0)
+ close_nointr_nofail(fd);
+}
+
+void status_printf(const char *format, ...) {
+ va_list ap;
+
+ assert(format);
+
+ va_start(ap, format);
+ status_vprintf(format, ap);
+ va_end(ap);
+}
+
+void status_welcome(void) {
+ char *pretty_name = NULL, *ansi_color = NULL;
+ const char *const_pretty = NULL, *const_color = NULL;
+ int r;
+
+ if ((r = parse_env_file("/etc/os-release", NEWLINE,
+ "PRETTY_NAME", &pretty_name,
+ "ANSI_COLOR", &ansi_color,
+ NULL)) < 0) {
+
+ if (r != -ENOENT)
+ log_warning("Failed to read /etc/os-release: %s", strerror(-r));
+ }
+
+#if defined(TARGET_FEDORA)
+ if (!pretty_name) {
+ if ((r = read_one_line_file("/etc/system-release", &pretty_name)) < 0) {
+
+ if (r != -ENOENT)
+ log_warning("Failed to read /etc/system-release: %s", strerror(-r));
+ }
+ }
+
+ if (!ansi_color && pretty_name) {
+
+ /* This tries to mimic the color magic the old Red Hat sysinit
+ * script did. */
+
+ if (startswith(pretty_name, "Red Hat"))
+ const_color = "0;31"; /* Red for RHEL */
+ else if (startswith(pretty_name, "Fedora"))
+ const_color = "0;34"; /* Blue for Fedora */
+ }
+
+#elif defined(TARGET_SUSE)
+
+ if (!pretty_name) {
+ if ((r = read_one_line_file("/etc/SuSE-release", &pretty_name)) < 0) {
+
+ if (r != -ENOENT)
+ log_warning("Failed to read /etc/SuSE-release: %s", strerror(-r));
+ }
+ }
+
+ if (!ansi_color)
+ const_color = "0;32"; /* Green for openSUSE */
+
+#elif defined(TARGET_GENTOO)
+
+ if (!pretty_name) {
+ if ((r = read_one_line_file("/etc/gentoo-release", &pretty_name)) < 0) {
+
+ if (r != -ENOENT)
+ log_warning("Failed to read /etc/gentoo-release: %s", strerror(-r));
+ }
+ }
+
+ if (!ansi_color)
+ const_color = "1;34"; /* Light Blue for Gentoo */
+
+#elif defined(TARGET_ALTLINUX)
+
+ if (!pretty_name) {
+ if ((r = read_one_line_file("/etc/altlinux-release", &pretty_name)) < 0) {
+
+ if (r != -ENOENT)
+ log_warning("Failed to read /etc/altlinux-release: %s", strerror(-r));
+ }
+ }
+
+ if (!ansi_color)
+ const_color = "0;36"; /* Cyan for ALTLinux */
+
+
+#elif defined(TARGET_DEBIAN)
+
+ if (!pretty_name) {
+ char *version;
+
+ if ((r = read_one_line_file("/etc/debian_version", &version)) < 0) {
+
+ if (r != -ENOENT)
+ log_warning("Failed to read /etc/debian_version: %s", strerror(-r));
+ } else {
+ pretty_name = strappend("Debian ", version);
+ free(version);
+
+ if (!pretty_name)
+ log_warning("Failed to allocate Debian version string.");
+ }
+ }
+
+ if (!ansi_color)
+ const_color = "1;31"; /* Light Red for Debian */
+
+#elif defined(TARGET_UBUNTU)
+
+ if ((r = parse_env_file("/etc/lsb-release", NEWLINE,
+ "DISTRIB_DESCRIPTION", &pretty_name,
+ NULL)) < 0) {
+
+ if (r != -ENOENT)
+ log_warning("Failed to read /etc/lsb-release: %s", strerror(-r));
+ }
+
+ if (!ansi_color)
+ const_color = "0;33"; /* Orange/Brown for Ubuntu */
+
+#elif defined(TARGET_MANDRIVA)
+
+ if (!pretty_name) {
+ char *s, *p;
+
+ if ((r = read_one_line_file("/etc/mandriva-release", &s) < 0)) {
+ if (r != -ENOENT)
+ log_warning("Failed to read /etc/mandriva-release: %s", strerror(-r));
+ } else {
+ p = strstr(s, " release ");
+ if (p) {
+ *p = '\0';
+ p += 9;
+ p[strcspn(p, " ")] = '\0';
+
+ /* This corresponds to standard rc.sysinit */
+ if (asprintf(&pretty_name, "%s\x1B[0;39m %s", s, p) > 0)
+ const_color = "1;36";
+ else
+ log_warning("Failed to allocate Mandriva version string.");
} else
- *(t++) = *f;
- break;
+ log_warning("Failed to parse /etc/mandriva-release");
+ free(s);
}
+ }
+#elif defined(TARGET_MEEGO)
- *t = 0;
+ if (!pretty_name) {
+ if ((r = read_one_line_file("/etc/meego-release", &pretty_name)) < 0) {
- return r;
-}
+ if (r != -ENOENT)
+ log_warning("Failed to read /etc/meego-release: %s", strerror(-r));
+ }
+ }
-char *cunescape_length(const char *s, size_t length) {
- char *r, *t;
- const char *f;
+ if (!ansi_color)
+ const_color = "1;35"; /* Bright Magenta for MeeGo */
+#endif
- assert(s);
+ if (!pretty_name && !const_pretty)
+ const_pretty = "Linux";
- /* Undoes C style string escaping */
+ if (!ansi_color && !const_color)
+ const_color = "1";
- if (!(r = new(char, length+1)))
- return r;
+ status_printf("\nWelcome to \x1B[%sm%s\x1B[0m!\n\n",
+ const_color ? const_color : ansi_color,
+ const_pretty ? const_pretty : pretty_name);
- for (f = s, t = r; f < s + length; f++) {
+ free(ansi_color);
+ free(pretty_name);
+}
- if (*f != '\\') {
- *(t++) = *f;
- continue;
- }
+char *replace_env(const char *format, char **env) {
+ enum {
+ WORD,
+ CURLY,
+ VARIABLE
+ } state = WORD;
- f++;
+ const char *e, *word = format;
+ char *r = NULL, *k;
- switch (*f) {
+ assert(format);
- case 'a':
- *(t++) = '\a';
- break;
- case 'b':
- *(t++) = '\b';
- break;
- case 'f':
- *(t++) = '\f';
- break;
- case 'n':
- *(t++) = '\n';
- break;
- case 'r':
- *(t++) = '\r';
- break;
- case 't':
- *(t++) = '\t';
- break;
- case 'v':
- *(t++) = '\v';
- break;
- case '\\':
- *(t++) = '\\';
- break;
- case '"':
- *(t++) = '"';
+ for (e = format; *e; e ++) {
+
+ switch (state) {
+
+ case WORD:
+ if (*e == '$')
+ state = CURLY;
break;
- case '\'':
- *(t++) = '\'';
+
+ case CURLY:
+ if (*e == '{') {
+ if (!(k = strnappend(r, word, e-word-1)))
+ goto fail;
+
+ free(r);
+ r = k;
+
+ word = e-1;
+ state = VARIABLE;
+
+ } else if (*e == '$') {
+ if (!(k = strnappend(r, word, e-word)))
+ goto fail;
+
+ free(r);
+ r = k;
+
+ word = e+1;
+ state = WORD;
+ } else
+ state = WORD;
break;
- case 'x': {
- /* hexadecimal encoding */
- int a, b;
+ case VARIABLE:
+ if (*e == '}') {
+ const char *t;
- if ((a = unhexchar(f[1])) < 0 ||
- (b = unhexchar(f[2])) < 0) {
- /* Invalid escape code, let's take it literal then */
- *(t++) = '\\';
- *(t++) = 'x';
- } else {
- *(t++) = (char) ((a << 4) | b);
- f += 2;
- }
+ if (!(t = strv_env_get_with_length(env, word+2, e-word-2)))
+ t = "";
+
+ if (!(k = strappend(r, t)))
+ goto fail;
+ free(r);
+ r = k;
+
+ word = e+1;
+ state = WORD;
+ }
break;
}
+ }
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7': {
- /* octal encoding */
- int a, b, c;
+ if (!(k = strnappend(r, word, e-word)))
+ goto fail;
- if ((a = unoctchar(f[0])) < 0 ||
- (b = unoctchar(f[1])) < 0 ||
- (c = unoctchar(f[2])) < 0) {
- /* Invalid escape code, let's take it literal then */
- *(t++) = '\\';
- *(t++) = f[0];
- } else {
- *(t++) = (char) ((a << 6) | (b << 3) | c);
- f += 2;
+ free(r);
+ return k;
+
+fail:
+ free(r);
+ return NULL;
+}
+
+char **replace_env_argv(char **argv, char **env) {
+ char **r, **i;
+ unsigned k = 0, l = 0;
+
+ l = strv_length(argv);
+
+ if (!(r = new(char*, l+1)))
+ return NULL;
+
+ STRV_FOREACH(i, argv) {
+
+ /* If $FOO appears as single word, replace it by the split up variable */
+ if ((*i)[0] == '$' && (*i)[1] != '{') {
+ char *e;
+ char **w, **m;
+ unsigned q;
+
+ if ((e = strv_env_get(env, *i+1))) {
+
+ if (!(m = strv_split_quoted(e))) {
+ r[k] = NULL;
+ strv_free(r);
+ return NULL;
+ }
+ } else
+ m = NULL;
+
+ q = strv_length(m);
+ l = l + q - 1;
+
+ if (!(w = realloc(r, sizeof(char*) * (l+1)))) {
+ r[k] = NULL;
+ strv_free(r);
+ strv_free(m);
+ return NULL;
}
- break;
- }
+ r = w;
+ if (m) {
+ memcpy(r + k, m, q * sizeof(char*));
+ free(m);
+ }
- case 0:
- /* premature end of string.*/
- *(t++) = '\\';
- goto finish;
+ k += q;
+ continue;
+ }
- default:
- /* Invalid escape code, let's take it literal then */
- *(t++) = '\\';
- *(t++) = *f;
- break;
+ /* If ${FOO} appears as part of a word, replace it by the variable as-is */
+ if (!(r[k++] = replace_env(*i, env))) {
+ strv_free(r);
+ return NULL;
}
}
-finish:
- *t = 0;
+ r[k] = NULL;
return r;
}
-char *cunescape(const char *s) {
- return cunescape_length(s, strlen(s));
+int columns(void) {
+ static __thread int parsed_columns = 0;
+ const char *e;
+
+ if (_likely_(parsed_columns > 0))
+ return parsed_columns;
+
+ if ((e = getenv("COLUMNS")))
+ parsed_columns = atoi(e);
+
+ if (parsed_columns <= 0) {
+ struct winsize ws;
+ zero(ws);
+
+ if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) >= 0)
+ parsed_columns = ws.ws_col;
+ }
+
+ if (parsed_columns <= 0)
+ parsed_columns = 80;
+
+ return parsed_columns;
}
-char *xescape(const char *s, const char *bad) {
- char *r, *t;
- const char *f;
+int running_in_chroot(void) {
+ struct stat a, b;
- /* Escapes all chars in bad, in addition to \ and all special
- * chars, in \xFF style escaping. May be reversed with
- * cunescape. */
+ zero(a);
+ zero(b);
- if (!(r = new(char, strlen(s)*4+1)))
- return NULL;
+ /* Only works as root */
- for (f = s, t = r; *f; f++) {
+ if (stat("/proc/1/root", &a) < 0)
+ return -errno;
- if ((*f < ' ') || (*f >= 127) ||
- (*f == '\\') || strchr(bad, *f)) {
- *(t++) = '\\';
- *(t++) = 'x';
- *(t++) = hexchar(*f >> 4);
- *(t++) = hexchar(*f);
- } else
- *(t++) = *f;
- }
+ if (stat("/", &b) < 0)
+ return -errno;
- *t = 0;
+ return
+ a.st_dev != b.st_dev ||
+ a.st_ino != b.st_ino;
+}
+
+char *ellipsize(const char *s, unsigned length, unsigned percent) {
+ size_t l, x;
+ char *r;
+
+ assert(s);
+ assert(percent <= 100);
+ assert(length >= 3);
+
+ l = strlen(s);
+
+ if (l <= 3 || l <= length)
+ return strdup(s);
+
+ if (!(r = new0(char, length+1)))
+ return r;
+
+ x = (length * percent) / 100;
+
+ if (x > length - 3)
+ x = length - 3;
+
+ memcpy(r, s, x);
+ r[x] = '.';
+ r[x+1] = '.';
+ r[x+2] = '.';
+ memcpy(r + x + 3,
+ s + l - (length - x - 3),
+ length - x - 3);
return r;
}
-char *bus_path_escape(const char *s) {
- char *r, *t;
- const char *f;
+int touch(const char *path) {
+ int fd;
+ assert(path);
+
+ if ((fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644)) < 0)
+ return -errno;
+
+ close_nointr_nofail(fd);
+ return 0;
+}
+
+char *unquote(const char *s, const char* quotes) {
+ size_t l;
assert(s);
- /* Escapes all chars that D-Bus' object path cannot deal
- * with. Can be reverse with bus_path_unescape() */
+ if ((l = strlen(s)) < 2)
+ return strdup(s);
- if (!(r = new(char, strlen(s)*3+1)))
+ if (strchr(quotes, s[0]) && s[l-1] == s[0])
+ return strndup(s+1, l-2);
+
+ return strdup(s);
+}
+
+char *normalize_env_assignment(const char *s) {
+ char *name, *value, *p, *r;
+
+ p = strchr(s, '=');
+
+ if (!p) {
+ if (!(r = strdup(s)))
+ return NULL;
+
+ return strstrip(r);
+ }
+
+ if (!(name = strndup(s, p - s)))
return NULL;
- for (f = s, t = r; *f; f++) {
+ if (!(p = strdup(p+1))) {
+ free(name);
+ return NULL;
+ }
- if (!(*f >= 'A' && *f <= 'Z') &&
- !(*f >= 'a' && *f <= 'z') &&
- !(*f >= '0' && *f <= '9')) {
- *(t++) = '_';
- *(t++) = hexchar(*f >> 4);
- *(t++) = hexchar(*f);
- } else
- *(t++) = *f;
+ value = unquote(strstrip(p), QUOTES);
+ free(p);
+
+ if (!value) {
+ free(name);
+ return NULL;
}
- *t = 0;
+ if (asprintf(&r, "%s=%s", name, value) < 0)
+ r = NULL;
+
+ free(value);
+ free(name);
return r;
}
-char *bus_path_unescape(const char *f) {
- char *r, *t;
+int wait_for_terminate(pid_t pid, siginfo_t *status) {
+ siginfo_t dummy;
- assert(f);
+ assert(pid >= 1);
- if (!(r = strdup(f)))
- return NULL;
+ if (!status)
+ status = &dummy;
- for (t = r; *f; f++) {
+ for (;;) {
+ zero(*status);
- if (*f == '_') {
- int a, b;
+ if (waitid(P_PID, pid, status, WEXITED) < 0) {
- if ((a = unhexchar(f[1])) < 0 ||
- (b = unhexchar(f[2])) < 0) {
- /* Invalid escape code, let's take it literal then */
- *(t++) = '_';
- } else {
- *(t++) = (char) ((a << 4) | b);
- f += 2;
- }
- } else
- *(t++) = *f;
- }
+ if (errno == EINTR)
+ continue;
- *t = 0;
+ return -errno;
+ }
- return r;
+ return 0;
+ }
}
-char *path_kill_slashes(char *path) {
- char *f, *t;
- bool slash = false;
+int wait_for_terminate_and_warn(const char *name, pid_t pid) {
+ int r;
+ siginfo_t status;
- /* Removes redundant inner and trailing slashes. Modifies the
- * passed string in-place.
- *
- * ///foo///bar/ becomes /foo/bar
- */
+ assert(name);
+ assert(pid > 1);
- for (f = path, t = path; *f; f++) {
+ if ((r = wait_for_terminate(pid, &status)) < 0) {
+ log_warning("Failed to wait for %s: %s", name, strerror(-r));
+ return r;
+ }
- if (*f == '/') {
- slash = true;
- continue;
+ if (status.si_code == CLD_EXITED) {
+ if (status.si_status != 0) {
+ log_warning("%s failed with error code %i.", name, status.si_status);
+ return status.si_status;
}
- if (slash) {
- slash = false;
- *(t++) = '/';
- }
+ log_debug("%s succeeded.", name);
+ return 0;
- *(t++) = *f;
+ } else if (status.si_code == CLD_KILLED ||
+ status.si_code == CLD_DUMPED) {
+
+ log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status));
+ return -EPROTO;
}
- /* Special rule, if we are talking of the root directory, a
- trailing slash is good */
+ log_warning("%s failed due to unknown reason.", name);
+ return -EPROTO;
- if (t == path && slash)
- *(t++) = '/';
+}
- *t = 0;
- return path;
+void freeze(void) {
+
+ /* Make sure nobody waits for us on a socket anymore */
+ close_all_fds(NULL, 0);
+
+ sync();
+
+ for (;;)
+ pause();
}
-bool path_startswith(const char *path, const char *prefix) {
- assert(path);
- assert(prefix);
+bool null_or_empty(struct stat *st) {
+ assert(st);
- if ((path[0] == '/') != (prefix[0] == '/'))
- return false;
+ if (S_ISREG(st->st_mode) && st->st_size <= 0)
+ return true;
- for (;;) {
- size_t a, b;
+ if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode))
+ return true;
- path += strspn(path, "/");
- prefix += strspn(prefix, "/");
+ return false;
+}
- if (*prefix == 0)
- return true;
+int null_or_empty_path(const char *fn) {
+ struct stat st;
- if (*path == 0)
- return false;
+ assert(fn);
- a = strcspn(path, "/");
- b = strcspn(prefix, "/");
+ if (stat(fn, &st) < 0)
+ return -errno;
- if (a != b)
- return false;
+ return null_or_empty(&st);
+}
- if (memcmp(path, prefix, a) != 0)
- return false;
+DIR *xopendirat(int fd, const char *name, int flags) {
+ int nfd;
+ DIR *d;
- path += a;
- prefix += b;
+ if ((nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags)) < 0)
+ return NULL;
+
+ if (!(d = fdopendir(nfd))) {
+ close_nointr_nofail(nfd);
+ return NULL;
}
+
+ return d;
}
-bool path_equal(const char *a, const char *b) {
- assert(a);
- assert(b);
+int signal_from_string_try_harder(const char *s) {
+ int signo;
+ assert(s);
- if ((a[0] == '/') != (b[0] == '/'))
- return false;
+ if ((signo = signal_from_string(s)) <= 0)
+ if (startswith(s, "SIG"))
+ return signal_from_string(s+3);
- for (;;) {
- size_t j, k;
+ return signo;
+}
- a += strspn(a, "/");
- b += strspn(b, "/");
+void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t) {
- if (*a == 0 && *b == 0)
- return true;
+ assert(f);
+ assert(name);
+ assert(t);
- if (*a == 0 || *b == 0)
- return false;
+ if (!dual_timestamp_is_set(t))
+ return;
- j = strcspn(a, "/");
- k = strcspn(b, "/");
+ fprintf(f, "%s=%llu %llu\n",
+ name,
+ (unsigned long long) t->realtime,
+ (unsigned long long) t->monotonic);
+}
- if (j != k)
- return false;
+void dual_timestamp_deserialize(const char *value, dual_timestamp *t) {
+ unsigned long long a, b;
- if (memcmp(a, b, j) != 0)
- return false;
+ assert(value);
+ assert(t);
- a += j;
- b += k;
+ if (sscanf(value, "%lli %llu", &a, &b) != 2)
+ log_debug("Failed to parse finish timestamp value %s", value);
+ else {
+ t->realtime = a;
+ t->monotonic = b;
}
}
-char *ascii_strlower(char *t) {
- char *p;
+char *fstab_node_to_udev_node(const char *p) {
+ char *dn, *t, *u;
+ int r;
- assert(t);
+ /* FIXME: to follow udev's logic 100% we need to leave valid
+ * UTF8 chars unescaped */
- for (p = t; *p; p++)
- if (*p >= 'A' && *p <= 'Z')
- *p = *p - 'A' + 'a';
+ if (startswith(p, "LABEL=")) {
- return t;
-}
+ if (!(u = unquote(p+6, "\"\'")))
+ return NULL;
-bool ignore_file(const char *filename) {
- assert(filename);
+ t = xescape(u, "/ ");
+ free(u);
- return
- filename[0] == '.' ||
- streq(filename, "lost+found") ||
- endswith(filename, "~") ||
- endswith(filename, ".rpmnew") ||
- endswith(filename, ".rpmsave") ||
- endswith(filename, ".rpmorig") ||
- endswith(filename, ".dpkg-old") ||
- endswith(filename, ".dpkg-new") ||
- endswith(filename, ".swp");
-}
+ if (!t)
+ return NULL;
-int fd_nonblock(int fd, bool nonblock) {
- int flags;
+ r = asprintf(&dn, "/dev/disk/by-label/%s", t);
+ free(t);
- assert(fd >= 0);
+ if (r < 0)
+ return NULL;
- if ((flags = fcntl(fd, F_GETFL, 0)) < 0)
- return -errno;
+ return dn;
+ }
- if (nonblock)
- flags |= O_NONBLOCK;
- else
- flags &= ~O_NONBLOCK;
+ if (startswith(p, "UUID=")) {
- if (fcntl(fd, F_SETFL, flags) < 0)
- return -errno;
+ if (!(u = unquote(p+5, "\"\'")))
+ return NULL;
- return 0;
+ t = xescape(u, "/ ");
+ free(u);
+
+ if (!t)
+ return NULL;
+
+ r = asprintf(&dn, "/dev/disk/by-uuid/%s", t);
+ free(t);
+
+ if (r < 0)
+ return NULL;
+
+ return dn;
+ }
+
+ return strdup(p);
}
-int fd_cloexec(int fd, bool cloexec) {
- int flags;
+void filter_environ(const char *prefix) {
+ int i, j;
+ assert(prefix);
- assert(fd >= 0);
+ if (!environ)
+ return;
- if ((flags = fcntl(fd, F_GETFD, 0)) < 0)
- return -errno;
+ for (i = 0, j = 0; environ[i]; i++) {
- if (cloexec)
- flags |= FD_CLOEXEC;
- else
- flags &= ~FD_CLOEXEC;
+ if (startswith(environ[i], prefix))
+ continue;
- if (fcntl(fd, F_SETFD, flags) < 0)
- return -errno;
+ environ[j++] = environ[i];
+ }
- return 0;
+ environ[j] = NULL;
}
-int close_all_fds(const int except[], unsigned n_except) {
- DIR *d;
- struct dirent *de;
- int r = 0;
+bool tty_is_vc(const char *tty) {
+ assert(tty);
- if (!(d = opendir("/proc/self/fd")))
- return -errno;
+ if (startswith(tty, "/dev/"))
+ tty += 5;
- while ((de = readdir(d))) {
- int fd = -1;
+ return vtnr_from_tty(tty) >= 0;
+}
- if (ignore_file(de->d_name))
- continue;
+int vtnr_from_tty(const char *tty) {
+ int i, r;
- if ((r = safe_atoi(de->d_name, &fd)) < 0)
- goto finish;
+ assert(tty);
- if (fd < 3)
- continue;
+ if (startswith(tty, "/dev/"))
+ tty += 5;
- if (fd == dirfd(d))
- continue;
+ if (!startswith(tty, "tty") )
+ return -EINVAL;
- if (except) {
- bool found;
- unsigned i;
+ if (tty[3] < '0' || tty[3] > '9')
+ return -EINVAL;
- found = false;
- for (i = 0; i < n_except; i++)
- if (except[i] == fd) {
- found = true;
- break;
- }
+ r = safe_atoi(tty+3, &i);
+ if (r < 0)
+ return r;
- if (found)
- continue;
- }
+ if (i < 0 || i > 63)
+ return -EINVAL;
- if ((r = close_nointr(fd)) < 0) {
- /* Valgrind has its own FD and doesn't want to have it closed */
- if (errno != EBADF)
- goto finish;
+ return i;
+}
+
+const char *default_term_for_tty(const char *tty) {
+ char *active = NULL;
+ const char *term;
+
+ assert(tty);
+
+ if (startswith(tty, "/dev/"))
+ tty += 5;
+
+ /* Resolve where /dev/console is pointing when determining
+ * TERM */
+ if (streq(tty, "console"))
+ if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) {
+ /* If multiple log outputs are configured the
+ * last one is what /dev/console points to */
+ if ((tty = strrchr(active, ' ')))
+ tty++;
+ else
+ tty = active;
}
- }
- r = 0;
+ term = tty_is_vc(tty) ? "TERM=linux" : "TERM=vt100";
+ free(active);
-finish:
- closedir(d);
- return r;
+ return term;
}
-bool chars_intersect(const char *a, const char *b) {
- const char *p;
+/* Returns a short identifier for the various VM implementations */
+int detect_vm(const char **id) {
- /* Returns true if any of the chars in a are in b. */
- for (p = a; *p; p++)
- if (strchr(b, *p))
- return true;
+#if defined(__i386__) || defined(__x86_64__)
- return false;
-}
+ /* Both CPUID and DMI are x86 specific interfaces... */
-char *format_timestamp(char *buf, size_t l, usec_t t) {
- struct tm tm;
- time_t sec;
+ static const char *const dmi_vendors[] = {
+ "/sys/class/dmi/id/sys_vendor",
+ "/sys/class/dmi/id/board_vendor",
+ "/sys/class/dmi/id/bios_vendor"
+ };
- assert(buf);
- assert(l > 0);
+ static const char dmi_vendor_table[] =
+ "QEMU\0" "qemu\0"
+ /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
+ "VMware\0" "vmware\0"
+ "VMW\0" "vmware\0"
+ "Microsoft Corporation\0" "microsoft\0"
+ "innotek GmbH\0" "oracle\0"
+ "Xen\0" "xen\0"
+ "Bochs\0" "bochs\0";
+
+ static const char cpuid_vendor_table[] =
+ "XenVMMXenVMM\0" "xen\0"
+ "KVMKVMKVM\0" "kvm\0"
+ /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
+ "VMwareVMware\0" "vmware\0"
+ /* http://msdn.microsoft.com/en-us/library/ff542428.aspx */
+ "Microsoft Hv\0" "microsoft\0";
+
+ uint32_t eax, ecx;
+ union {
+ uint32_t sig32[3];
+ char text[13];
+ } sig;
+ unsigned i;
+ const char *j, *k;
+ bool hypervisor;
+
+ /* http://lwn.net/Articles/301888/ */
+ zero(sig);
+
+#if defined (__i386__)
+#define REG_a "eax"
+#define REG_b "ebx"
+#elif defined (__amd64__)
+#define REG_a "rax"
+#define REG_b "rbx"
+#endif
- if (t <= 0)
- return NULL;
+ /* First detect whether there is a hypervisor */
+ eax = 1;
+ __asm__ __volatile__ (
+ /* ebx/rbx is being used for PIC! */
+ " push %%"REG_b" \n\t"
+ " cpuid \n\t"
+ " pop %%"REG_b" \n\t"
- sec = (time_t) (t / USEC_PER_SEC);
+ : "=a" (eax), "=c" (ecx)
+ : "0" (eax)
+ );
- if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0)
- return NULL;
+ hypervisor = !!(ecx & 0x80000000U);
- return buf;
-}
+ if (hypervisor) {
-char *format_timespan(char *buf, size_t l, usec_t t) {
- static const struct {
- const char *suffix;
- usec_t usec;
- } table[] = {
- { "w", USEC_PER_WEEK },
- { "d", USEC_PER_DAY },
- { "h", USEC_PER_HOUR },
- { "min", USEC_PER_MINUTE },
- { "s", USEC_PER_SEC },
- { "ms", USEC_PER_MSEC },
- { "us", 1 },
- };
+ /* There is a hypervisor, see what it is */
+ eax = 0x40000000U;
+ __asm__ __volatile__ (
+ /* ebx/rbx is being used for PIC! */
+ " push %%"REG_b" \n\t"
+ " cpuid \n\t"
+ " mov %%ebx, %1 \n\t"
+ " pop %%"REG_b" \n\t"
+
+ : "=a" (eax), "=r" (sig.sig32[0]), "=c" (sig.sig32[1]), "=d" (sig.sig32[2])
+ : "0" (eax)
+ );
+
+ NULSTR_FOREACH_PAIR(j, k, cpuid_vendor_table)
+ if (streq(sig.text, j)) {
+
+ if (id)
+ *id = k;
+
+ return 1;
+ }
+ }
+
+ for (i = 0; i < ELEMENTSOF(dmi_vendors); i++) {
+ char *s;
+ int r;
+ const char *found = NULL;
+
+ if ((r = read_one_line_file(dmi_vendors[i], &s)) < 0) {
+ if (r != -ENOENT)
+ return r;
+
+ continue;
+ }
+
+ NULSTR_FOREACH_PAIR(j, k, dmi_vendor_table)
+ if (startswith(s, j))
+ found = k;
+ free(s);
+
+ if (found) {
+ if (id)
+ *id = found;
+
+ return 1;
+ }
+ }
- unsigned i;
- char *p = buf;
+ if (hypervisor) {
+ if (id)
+ *id = "other";
- assert(buf);
- assert(l > 0);
+ return 1;
+ }
- if (t == (usec_t) -1)
- return NULL;
+#endif
+ return 0;
+}
- /* The result of this function can be parsed with parse_usec */
+int detect_container(const char **id) {
+ FILE *f;
- for (i = 0; i < ELEMENTSOF(table); i++) {
- int k;
- size_t n;
+ /* Unfortunately many of these operations require root access
+ * in one way or another */
- if (t < table[i].usec)
- continue;
+ if (geteuid() != 0)
+ return -EPERM;
- if (l <= 1)
- break;
+ if (running_in_chroot() > 0) {
- k = snprintf(p, l, "%s%llu%s", p > buf ? " " : "", (unsigned long long) (t / table[i].usec), table[i].suffix);
- n = MIN((size_t) k, l);
+ if (id)
+ *id = "chroot";
- l -= n;
- p += n;
+ return 1;
+ }
- t %= table[i].usec;
+ /* /proc/vz exists in container and outside of the container,
+ * /proc/bc only outside of the container. */
+ if (access("/proc/vz", F_OK) >= 0 &&
+ access("/proc/bc", F_OK) < 0) {
+
+ if (id)
+ *id = "openvz";
+
+ return 1;
}
- *p = 0;
+ if ((f = fopen("/proc/self/cgroup", "re"))) {
- return buf;
-}
+ for (;;) {
+ char line[LINE_MAX], *p;
-bool fstype_is_network(const char *fstype) {
- static const char * const table[] = {
- "cifs",
- "smbfs",
- "ncpfs",
- "nfs",
- "nfs4",
- "gfs",
- "gfs2"
- };
+ if (!fgets(line, sizeof(line), f))
+ break;
- unsigned i;
+ if (!(p = strchr(strstrip(line), ':')))
+ continue;
- for (i = 0; i < ELEMENTSOF(table); i++)
- if (streq(table[i], fstype))
- return true;
+ if (strncmp(p, ":ns:", 4))
+ continue;
- return false;
+ if (!streq(p, ":ns:/")) {
+ fclose(f);
+
+ if (id)
+ *id = "pidns";
+
+ return 1;
+ }
+ }
+
+ fclose(f);
+ }
+
+ return 0;
}
-int chvt(int vt) {
- int fd, r = 0;
+/* Returns a short identifier for the various VM/container implementations */
+int detect_virtualization(const char **id) {
+ static __thread const char *cached_id = NULL;
+ const char *_id;
+ int r;
- if ((fd = open("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0)
- return -errno;
+ if (_likely_(cached_id)) {
- if (vt < 0) {
- int tiocl[2] = {
- TIOCL_GETKMSGREDIRECT,
- 0
- };
+ if (cached_id == (const char*) -1)
+ return 0;
- if (ioctl(fd, TIOCLINUX, tiocl) < 0)
- return -errno;
+ if (id)
+ *id = cached_id;
- vt = tiocl[0] <= 0 ? 1 : tiocl[0];
+ return 1;
}
- if (ioctl(fd, VT_ACTIVATE, vt) < 0)
- r = -errno;
+ if ((r = detect_container(&_id)) != 0)
+ goto finish;
+
+ r = detect_vm(&_id);
+
+finish:
+ if (r > 0) {
+ cached_id = _id;
+
+ if (id)
+ *id = _id;
+ } else if (r == 0)
+ cached_id = (const char*) -1;
- close_nointr_nofail(r);
return r;
}
-int read_one_char(FILE *f, char *ret, bool *need_nl) {
- struct termios old_termios, new_termios;
- char c;
- char line[1024];
+bool dirent_is_file(struct dirent *de) {
+ assert(de);
- assert(f);
- assert(ret);
+ if (ignore_file(de->d_name))
+ return false;
- if (tcgetattr(fileno(f), &old_termios) >= 0) {
- new_termios = old_termios;
+ if (de->d_type != DT_REG &&
+ de->d_type != DT_LNK &&
+ de->d_type != DT_UNKNOWN)
+ return false;
- new_termios.c_lflag &= ~ICANON;
- new_termios.c_cc[VMIN] = 1;
- new_termios.c_cc[VTIME] = 0;
+ return true;
+}
- if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) {
- size_t k;
+void execute_directory(const char *directory, DIR *d, char *argv[]) {
+ DIR *_d = NULL;
+ struct dirent *de;
+ Hashmap *pids = NULL;
- k = fread(&c, 1, 1, f);
+ assert(directory);
- tcsetattr(fileno(f), TCSADRAIN, &old_termios);
+ /* Executes all binaries in a directory in parallel and waits
+ * until all they all finished. */
- if (k <= 0)
- return -EIO;
+ if (!d) {
+ if (!(_d = opendir(directory))) {
- if (need_nl)
- *need_nl = c != '\n';
+ if (errno == ENOENT)
+ return;
- *ret = c;
- return 0;
+ log_error("Failed to enumerate directory %s: %m", directory);
+ return;
}
+
+ d = _d;
}
- if (!(fgets(line, sizeof(line), f)))
- return -EIO;
+ if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) {
+ log_error("Failed to allocate set.");
+ goto finish;
+ }
- truncate_nl(line);
+ while ((de = readdir(d))) {
+ char *path;
+ pid_t pid;
+ int k;
- if (strlen(line) != 1)
- return -EBADMSG;
+ if (!dirent_is_file(de))
+ continue;
- if (need_nl)
- *need_nl = false;
+ if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) {
+ log_error("Out of memory");
+ continue;
+ }
- *ret = line[0];
- return 0;
-}
+ if ((pid = fork()) < 0) {
+ log_error("Failed to fork: %m");
+ free(path);
+ continue;
+ }
-int ask(char *ret, const char *replies, const char *text, ...) {
- assert(ret);
- assert(replies);
- assert(text);
+ if (pid == 0) {
+ char *_argv[2];
+ /* Child */
- for (;;) {
- va_list ap;
- char c;
- int r;
- bool need_nl = true;
+ if (!argv) {
+ _argv[0] = path;
+ _argv[1] = NULL;
+ argv = _argv;
+ } else
+ if (!argv[0])
+ argv[0] = path;
- fputs("\x1B[1m", stdout);
+ execv(path, argv);
- va_start(ap, text);
- vprintf(text, ap);
- va_end(ap);
+ log_error("Failed to execute %s: %m", path);
+ _exit(EXIT_FAILURE);
+ }
- fputs("\x1B[0m", stdout);
+ log_debug("Spawned %s as %lu", path, (unsigned long) pid);
- fflush(stdout);
+ if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) {
+ log_error("Failed to add PID to set: %s", strerror(-k));
+ free(path);
+ }
+ }
- if ((r = read_one_char(stdin, &c, &need_nl)) < 0) {
+ while (!hashmap_isempty(pids)) {
+ siginfo_t si;
+ char *path;
- if (r == -EBADMSG) {
- puts("Bad input, please try again.");
+ zero(si);
+ if (waitid(P_ALL, 0, &si, WEXITED) < 0) {
+
+ if (errno == EINTR)
continue;
- }
- putchar('\n');
- return r;
+ log_error("waitid() failed: %m");
+ goto finish;
}
- if (need_nl)
- putchar('\n');
+ if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) {
+ if (!is_clean_exit(si.si_code, si.si_status)) {
+ if (si.si_code == CLD_EXITED)
+ log_error("%s exited with exit status %i.", path, si.si_status);
+ else
+ log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status));
+ } else
+ log_debug("%s exited successfully.", path);
- if (strchr(replies, c)) {
- *ret = c;
- return 0;
+ free(path);
}
-
- puts("Read unexpected character, please try again.");
}
-}
-int reset_terminal(int fd) {
- struct termios termios;
- int r = 0;
+finish:
+ if (_d)
+ closedir(_d);
- assert(fd >= 0);
+ if (pids)
+ hashmap_free_free(pids);
+}
- /* Set terminal to some sane defaults */
+int kill_and_sigcont(pid_t pid, int sig) {
+ int r;
- if (tcgetattr(fd, &termios) < 0) {
- r = -errno;
- goto finish;
- }
+ r = kill(pid, sig) < 0 ? -errno : 0;
- /* We only reset the stuff that matters to the software. How
- * hardware is set up we don't touch assuming that somebody
- * else will do that for us */
+ if (r >= 0)
+ kill(pid, SIGCONT);
- termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC);
- termios.c_iflag |= ICRNL | IMAXBEL | IUTF8;
- termios.c_oflag |= ONLCR;
- termios.c_cflag |= CREAD;
- termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE;
+ return r;
+}
- termios.c_cc[VINTR] = 03; /* ^C */
- termios.c_cc[VQUIT] = 034; /* ^\ */
- termios.c_cc[VERASE] = 0177;
- termios.c_cc[VKILL] = 025; /* ^X */
- termios.c_cc[VEOF] = 04; /* ^D */
- termios.c_cc[VSTART] = 021; /* ^Q */
- termios.c_cc[VSTOP] = 023; /* ^S */
- termios.c_cc[VSUSP] = 032; /* ^Z */
- termios.c_cc[VLNEXT] = 026; /* ^V */
- termios.c_cc[VWERASE] = 027; /* ^W */
- termios.c_cc[VREPRINT] = 022; /* ^R */
- termios.c_cc[VEOL] = 0;
- termios.c_cc[VEOL2] = 0;
+bool nulstr_contains(const char*nulstr, const char *needle) {
+ const char *i;
- termios.c_cc[VTIME] = 0;
- termios.c_cc[VMIN] = 1;
+ if (!nulstr)
+ return false;
- if (tcsetattr(fd, TCSANOW, &termios) < 0)
- r = -errno;
+ NULSTR_FOREACH(i, nulstr)
+ if (streq(i, needle))
+ return true;
-finish:
- /* Just in case, flush all crap out */
- tcflush(fd, TCIOFLUSH);
+ return false;
+}
- return r;
+bool plymouth_running(void) {
+ return access("/run/plymouth/pid", F_OK) >= 0;
}
-int open_terminal(const char *name, int mode) {
- int fd, r;
+void parse_syslog_priority(char **p, int *priority) {
+ int a = 0, b = 0, c = 0;
+ int k;
- if ((fd = open(name, mode)) < 0)
- return -errno;
+ assert(p);
+ assert(*p);
+ assert(priority);
- if ((r = isatty(fd)) < 0) {
- close_nointr_nofail(fd);
+ if ((*p)[0] != '<')
+ return;
+
+ if (!strchr(*p, '>'))
+ return;
+
+ if ((*p)[2] == '>') {
+ c = undecchar((*p)[1]);
+ k = 3;
+ } else if ((*p)[3] == '>') {
+ b = undecchar((*p)[1]);
+ c = undecchar((*p)[2]);
+ k = 4;
+ } else if ((*p)[4] == '>') {
+ a = undecchar((*p)[1]);
+ b = undecchar((*p)[2]);
+ c = undecchar((*p)[3]);
+ k = 5;
+ } else
+ return;
+
+ if (a < 0 || b < 0 || c < 0)
+ return;
+
+ *priority = a*100+b*10+c;
+ *p += k;
+}
+
+int have_effective_cap(int value) {
+ cap_t cap;
+ cap_flag_value_t fv;
+ int r;
+
+ if (!(cap = cap_get_proc()))
return -errno;
- }
- if (!r) {
- close_nointr_nofail(fd);
- return -ENOTTY;
- }
+ if (cap_get_flag(cap, value, CAP_EFFECTIVE, &fv) < 0)
+ r = -errno;
+ else
+ r = fv == CAP_SET;
- return fd;
+ cap_free(cap);
+ return r;
}
-int flush_fd(int fd) {
- struct pollfd pollfd;
+char* strshorten(char *s, size_t l) {
+ assert(s);
- zero(pollfd);
- pollfd.fd = fd;
- pollfd.events = POLLIN;
+ if (l < strlen(s))
+ s[l] = 0;
- for (;;) {
- char buf[1024];
- ssize_t l;
- int r;
+ return s;
+}
- if ((r = poll(&pollfd, 1, 0)) < 0) {
+static bool hostname_valid_char(char c) {
+ return
+ (c >= 'a' && c <= 'z') ||
+ (c >= 'A' && c <= 'Z') ||
+ (c >= '0' && c <= '9') ||
+ c == '-' ||
+ c == '_' ||
+ c == '.';
+}
- if (errno == EINTR)
- continue;
+bool hostname_is_valid(const char *s) {
+ const char *p;
+
+ if (isempty(s))
+ return false;
- return -errno;
- }
+ for (p = s; *p; p++)
+ if (!hostname_valid_char(*p))
+ return false;
- if (r == 0)
- return 0;
+ if (p-s > HOST_NAME_MAX)
+ return false;
- if ((l = read(fd, buf, sizeof(buf))) < 0) {
+ return true;
+}
- if (errno == EINTR)
- continue;
+char* hostname_cleanup(char *s) {
+ char *p, *d;
- if (errno == EAGAIN)
- return 0;
+ for (p = s, d = s; *p; p++)
+ if ((*p >= 'a' && *p <= 'z') ||
+ (*p >= 'A' && *p <= 'Z') ||
+ (*p >= '0' && *p <= '9') ||
+ *p == '-' ||
+ *p == '_' ||
+ *p == '.')
+ *(d++) = *p;
- return -errno;
- }
+ *d = 0;
- if (l <= 0)
- return 0;
- }
+ strshorten(s, HOST_NAME_MAX);
+ return s;
}
-int acquire_terminal(const char *name, bool fail, bool force, bool ignore_tiocstty_eperm) {
- int fd = -1, notify = -1, r, wd = -1;
+int pipe_eof(int fd) {
+ struct pollfd pollfd;
+ int r;
- assert(name);
+ zero(pollfd);
+ pollfd.fd = fd;
+ pollfd.events = POLLIN|POLLHUP;
- /* We use inotify to be notified when the tty is closed. We
- * create the watch before checking if we can actually acquire
- * it, so that we don't lose any event.
- *
- * Note: strictly speaking this actually watches for the
- * device being closed, it does *not* really watch whether a
- * tty loses its controlling process. However, unless some
- * rogue process uses TIOCNOTTY on /dev/tty *after* closing
- * its tty otherwise this will not become a problem. As long
- * as the administrator makes sure not configure any service
- * on the same tty as an untrusted user this should not be a
- * problem. (Which he probably should not do anyway.) */
+ r = poll(&pollfd, 1, 0);
+ if (r < 0)
+ return -errno;
- if (!fail && !force) {
- if ((notify = inotify_init1(IN_CLOEXEC)) < 0) {
- r = -errno;
- goto fail;
- }
+ if (r == 0)
+ return 0;
- if ((wd = inotify_add_watch(notify, name, IN_CLOSE)) < 0) {
- r = -errno;
- goto fail;
- }
- }
+ return pollfd.revents & POLLHUP;
+}
- for (;;) {
- if (notify >= 0)
- if ((r = flush_fd(notify)) < 0)
- goto fail;
+int fopen_temporary(const char *path, FILE **_f, char **_temp_path) {
+ FILE *f;
+ char *t;
+ const char *fn;
+ size_t k;
+ int fd;
- /* We pass here O_NOCTTY only so that we can check the return
- * value TIOCSCTTY and have a reliable way to figure out if we
- * successfully became the controlling process of the tty */
- if ((fd = open_terminal(name, O_RDWR|O_NOCTTY)) < 0)
- return -errno;
+ assert(path);
+ assert(_f);
+ assert(_temp_path);
- /* First, try to get the tty */
- r = ioctl(fd, TIOCSCTTY, force);
+ t = new(char, strlen(path) + 1 + 6 + 1);
+ if (!t)
+ return -ENOMEM;
- /* Sometimes it makes sense to ignore TIOCSCTTY
- * returning EPERM, i.e. when very likely we already
- * are have this controlling terminal. */
- if (r < 0 && errno == EPERM && ignore_tiocstty_eperm)
- r = 0;
+ fn = file_name_from_path(path);
+ k = fn-path;
+ memcpy(t, path, k);
+ t[k] = '.';
+ stpcpy(stpcpy(t+k+1, fn), "XXXXXX");
- if (r < 0 && (force || fail || errno != EPERM)) {
- r = -errno;
- goto fail;
- }
+ fd = mkostemp(t, O_WRONLY|O_CLOEXEC);
+ if (fd < 0) {
+ free(t);
+ return -errno;
+ }
- if (r >= 0)
- break;
+ f = fdopen(fd, "we");
+ if (!f) {
+ unlink(t);
+ free(t);
+ return -errno;
+ }
- assert(!fail);
- assert(!force);
- assert(notify >= 0);
+ *_f = f;
+ *_temp_path = t;
- for (;;) {
- struct inotify_event e;
- ssize_t l;
+ return 0;
+}
- if ((l = read(notify, &e, sizeof(e))) != sizeof(e)) {
+int terminal_vhangup_fd(int fd) {
+ assert(fd >= 0);
- if (l < 0) {
+ if (ioctl(fd, TIOCVHANGUP) < 0)
+ return -errno;
- if (errno == EINTR)
- continue;
+ return 0;
+}
- r = -errno;
- } else
- r = -EIO;
+int terminal_vhangup(const char *name) {
+ int fd, r;
- goto fail;
- }
+ fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
+ if (fd < 0)
+ return fd;
- if (e.wd != wd || !(e.mask & IN_CLOSE)) {
- r = -errno;
- goto fail;
- }
+ r = terminal_vhangup_fd(fd);
+ close_nointr_nofail(fd);
- break;
- }
+ return r;
+}
- /* We close the tty fd here since if the old session
- * ended our handle will be dead. It's important that
- * we do this after sleeping, so that we don't enter
- * an endless loop. */
- close_nointr_nofail(fd);
- }
+int vt_disallocate(const char *name) {
+ int fd, r;
+ unsigned u;
- if (notify >= 0)
- close_nointr_nofail(notify);
+ /* Deallocate the VT if possible. If not possible
+ * (i.e. because it is the active one), at least clear it
+ * entirely (including the scrollback buffer) */
- if ((r = reset_terminal(fd)) < 0)
- log_warning("Failed to reset terminal: %s", strerror(-r));
+ if (!startswith(name, "/dev/"))
+ return -EINVAL;
- return fd;
+ if (!tty_is_vc(name)) {
+ /* So this is not a VT. I guess we cannot deallocate
+ * it then. But let's at least clear the screen */
-fail:
- if (fd >= 0)
+ fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
+ if (fd < 0)
+ return fd;
+
+ loop_write(fd,
+ "\033[r" /* clear scrolling region */
+ "\033[H" /* move home */
+ "\033[2J", /* clear screen */
+ 10, false);
close_nointr_nofail(fd);
- if (notify >= 0)
- close_nointr_nofail(notify);
+ return 0;
+ }
- return r;
-}
+ if (!startswith(name, "/dev/tty"))
+ return -EINVAL;
-int release_terminal(void) {
- int r = 0, fd;
- struct sigaction sa_old, sa_new;
+ r = safe_atou(name+8, &u);
+ if (r < 0)
+ return r;
- if ((fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY)) < 0)
- return -errno;
+ if (u <= 0)
+ return -EINVAL;
- /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed
- * by our own TIOCNOTTY */
+ /* Try to deallocate */
+ fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC);
+ if (fd < 0)
+ return fd;
- zero(sa_new);
- sa_new.sa_handler = SIG_IGN;
- sa_new.sa_flags = SA_RESTART;
- assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0);
+ r = ioctl(fd, VT_DISALLOCATE, u);
+ close_nointr_nofail(fd);
- if (ioctl(fd, TIOCNOTTY) < 0)
- r = -errno;
+ if (r >= 0)
+ return 0;
- assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0);
+ if (errno != EBUSY)
+ return -errno;
+ /* Couldn't deallocate, so let's clear it fully with
+ * scrollback */
+ fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
+ if (fd < 0)
+ return fd;
+
+ loop_write(fd,
+ "\033[r" /* clear scrolling region */
+ "\033[H" /* move home */
+ "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */
+ 10, false);
close_nointr_nofail(fd);
- return r;
-}
-
-int sigaction_many(const struct sigaction *sa, ...) {
- va_list ap;
- int r = 0, sig;
-
- va_start(ap, sa);
- while ((sig = va_arg(ap, int)) > 0)
- if (sigaction(sig, sa, NULL) < 0)
- r = -errno;
- va_end(ap);
- return r;
+ return 0;
}
-int ignore_signals(int sig, ...) {
- struct sigaction sa;
- va_list ap;
- int r = 0;
- zero(sa);
- sa.sa_handler = SIG_IGN;
- sa.sa_flags = SA_RESTART;
+static int file_is_conf(const struct dirent *d, const char *suffix) {
+ assert(d);
- if (sigaction(sig, &sa, NULL) < 0)
- r = -errno;
+ if (ignore_file(d->d_name))
+ return 0;
- va_start(ap, sig);
- while ((sig = va_arg(ap, int)) > 0)
- if (sigaction(sig, &sa, NULL) < 0)
- r = -errno;
- va_end(ap);
+ if (d->d_type != DT_REG &&
+ d->d_type != DT_LNK &&
+ d->d_type != DT_UNKNOWN)
+ return 0;
- return r;
+ return endswith(d->d_name, suffix);
}
-int default_signals(int sig, ...) {
- struct sigaction sa;
- va_list ap;
+static int files_add(Hashmap *h, const char *path, const char *suffix) {
+ DIR *dir;
+ struct dirent buffer, *de;
int r = 0;
- zero(sa);
- sa.sa_handler = SIG_DFL;
- sa.sa_flags = SA_RESTART;
+ dir = opendir(path);
+ if (!dir) {
+ if (errno == ENOENT)
+ return 0;
+ return -errno;
+ }
- if (sigaction(sig, &sa, NULL) < 0)
- r = -errno;
+ for (;;) {
+ int k;
+ char *p, *f;
- va_start(ap, sig);
- while ((sig = va_arg(ap, int)) > 0)
- if (sigaction(sig, &sa, NULL) < 0)
- r = -errno;
- va_end(ap);
+ k = readdir_r(dir, &buffer, &de);
+ if (k != 0) {
+ r = -k;
+ goto finish;
+ }
- return r;
-}
+ if (!de)
+ break;
-int close_pipe(int p[]) {
- int a = 0, b = 0;
+ if (!file_is_conf(de, suffix))
+ continue;
- assert(p);
+ if (asprintf(&p, "%s/%s", path, de->d_name) < 0) {
+ r = -ENOMEM;
+ goto finish;
+ }
- if (p[0] >= 0) {
- a = close_nointr(p[0]);
- p[0] = -1;
- }
+ f = canonicalize_file_name(p);
+ if (!f) {
+ log_error("Failed to canonicalize file name '%s': %m", p);
+ free(p);
+ continue;
+ }
+ free(p);
- if (p[1] >= 0) {
- b = close_nointr(p[1]);
- p[1] = -1;
+ log_debug("found: %s\n", f);
+ if (hashmap_put(h, file_name_from_path(f), f) <= 0)
+ free(f);
}
- return a < 0 ? a : b;
+finish:
+ closedir(dir);
+ return r;
}
-ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) {
- uint8_t *p;
- ssize_t n = 0;
+static int base_cmp(const void *a, const void *b) {
+ const char *s1, *s2;
- assert(fd >= 0);
- assert(buf);
+ s1 = *(char * const *)a;
+ s2 = *(char * const *)b;
+ return strcmp(file_name_from_path(s1), file_name_from_path(s2));
+}
- p = buf;
+int conf_files_list(char ***strv, const char *suffix, const char *dir, ...) {
+ Hashmap *fh = NULL;
+ char **dirs = NULL;
+ char **files = NULL;
+ char **p;
+ va_list ap;
+ int r = 0;
- while (nbytes > 0) {
- ssize_t k;
+ va_start(ap, dir);
+ dirs = strv_new_ap(dir, ap);
+ va_end(ap);
+ if (!dirs) {
+ r = -ENOMEM;
+ goto finish;
+ }
+ if (!strv_path_canonicalize(dirs)) {
+ r = -ENOMEM;
+ goto finish;
+ }
+ if (!strv_uniq(dirs)) {
+ r = -ENOMEM;
+ goto finish;
+ }
- if ((k = read(fd, p, nbytes)) <= 0) {
+ fh = hashmap_new(string_hash_func, string_compare_func);
+ if (!fh) {
+ r = -ENOMEM;
+ goto finish;
+ }
- if (k < 0 && errno == EINTR)
- continue;
+ STRV_FOREACH(p, dirs) {
+ if (files_add(fh, *p, suffix) < 0) {
+ log_error("Failed to search for files.");
+ r = -EINVAL;
+ goto finish;
+ }
+ }
+
+ files = hashmap_get_strv(fh);
+ if (files == NULL) {
+ log_error("Failed to compose list of files.");
+ r = -ENOMEM;
+ goto finish;
+ }
- if (k < 0 && errno == EAGAIN && do_poll) {
- struct pollfd pollfd;
+ qsort(files, hashmap_size(fh), sizeof(char *), base_cmp);
- zero(pollfd);
- pollfd.fd = fd;
- pollfd.events = POLLIN;
+finish:
+ strv_free(dirs);
+ hashmap_free(fh);
+ *strv = files;
+ return r;
+}
- if (poll(&pollfd, 1, -1) < 0) {
- if (errno == EINTR)
- continue;
+int hwclock_is_localtime(void) {
+ FILE *f;
+ bool local = false;
+
+ /*
+ * The third line of adjtime is "UTC" or "LOCAL" or nothing.
+ * # /etc/adjtime
+ * 0.0 0 0
+ * 0
+ * UTC
+ */
+ f = fopen("/etc/adjtime", "re");
+ if (f) {
+ char line[LINE_MAX];
+ bool b;
- return n > 0 ? n : -errno;
- }
+ b = fgets(line, sizeof(line), f) &&
+ fgets(line, sizeof(line), f) &&
+ fgets(line, sizeof(line), f);
- if (pollfd.revents != POLLIN)
- return n > 0 ? n : -EIO;
+ fclose(f);
- continue;
- }
+ if (!b)
+ return -EIO;
- return n > 0 ? n : (k < 0 ? -errno : 0);
- }
- p += k;
- nbytes -= k;
- n += k;
- }
+ truncate_nl(line);
+ local = streq(line, "LOCAL");
- return n;
+ } else if (errno != -ENOENT)
+ return -errno;
+
+ return local;
}
-ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) {
- const uint8_t *p;
- ssize_t n = 0;
+int hwclock_apply_localtime_delta(int *min) {
+ const struct timeval *tv_null = NULL;
+ struct timespec ts;
+ struct tm *tm;
+ int minuteswest;
+ struct timezone tz;
- assert(fd >= 0);
- assert(buf);
+ assert_se(clock_gettime(CLOCK_REALTIME, &ts) == 0);
+ assert_se(tm = localtime(&ts.tv_sec));
+ minuteswest = tm->tm_gmtoff / 60;
- p = buf;
+ tz.tz_minuteswest = -minuteswest;
+ tz.tz_dsttime = 0; /* DST_NONE*/
- while (nbytes > 0) {
- ssize_t k;
+ /*
+ * If the hardware clock does not run in UTC, but in local time:
+ * The very first time we set the kernel's timezone, it will warp
+ * the clock so that it runs in UTC instead of local time.
+ */
+ if (settimeofday(tv_null, &tz) < 0)
+ return -errno;
+ if (min)
+ *min = minuteswest;
+ return 0;
+}
- if ((k = write(fd, p, nbytes)) <= 0) {
+int hwclock_reset_localtime_delta(void) {
+ const struct timeval *tv_null = NULL;
+ struct timezone tz;
- if (k < 0 && errno == EINTR)
- continue;
+ tz.tz_minuteswest = 0;
+ tz.tz_dsttime = 0; /* DST_NONE*/
- if (k < 0 && errno == EAGAIN && do_poll) {
- struct pollfd pollfd;
+ if (settimeofday(tv_null, &tz) < 0)
+ return -errno;
- zero(pollfd);
- pollfd.fd = fd;
- pollfd.events = POLLOUT;
+ return 0;
+}
- if (poll(&pollfd, 1, -1) < 0) {
- if (errno == EINTR)
- continue;
+int hwclock_get_time(struct tm *tm) {
+ int fd;
+ int err = 0;
- return n > 0 ? n : -errno;
- }
+ assert(tm);
- if (pollfd.revents != POLLOUT)
- return n > 0 ? n : -EIO;
+ fd = open("/dev/rtc0", O_RDONLY|O_CLOEXEC);
+ if (fd < 0)
+ return -errno;
- continue;
- }
+ /* This leaves the timezone fields of struct tm
+ * uninitialized! */
+ if (ioctl(fd, RTC_RD_TIME, tm) < 0)
+ err = -errno;
- return n > 0 ? n : (k < 0 ? -errno : 0);
- }
+ /* We don't now daylight saving, so we reset this in order not
+ * to confused mktime(). */
+ tm->tm_isdst = -1;
- p += k;
- nbytes -= k;
- n += k;
- }
+ close_nointr_nofail(fd);
- return n;
+ return err;
}
-int path_is_mount_point(const char *t) {
- struct stat a, b;
- char *copy;
-
- if (lstat(t, &a) < 0) {
+int hwclock_set_time(const struct tm *tm) {
+ int fd;
+ int err = 0;
- if (errno == ENOENT)
- return 0;
+ assert(tm);
+ fd = open("/dev/rtc0", O_RDONLY|O_CLOEXEC);
+ if (fd < 0)
return -errno;
- }
- if (!(copy = strdup(t)))
- return -ENOMEM;
-
- if (lstat(dirname(copy), &b) < 0) {
- free(copy);
- return -errno;
- }
+ if (ioctl(fd, RTC_SET_TIME, tm) < 0)
+ err = -errno;
- free(copy);
+ close_nointr_nofail(fd);
- return a.st_dev != b.st_dev;
+ return err;
}
-int parse_usec(const char *t, usec_t *usec) {
- static const struct {
- const char *suffix;
- usec_t usec;
- } table[] = {
- { "sec", USEC_PER_SEC },
- { "s", USEC_PER_SEC },
- { "min", USEC_PER_MINUTE },
- { "hr", USEC_PER_HOUR },
- { "h", USEC_PER_HOUR },
- { "d", USEC_PER_DAY },
- { "w", USEC_PER_WEEK },
- { "msec", USEC_PER_MSEC },
- { "ms", USEC_PER_MSEC },
- { "m", USEC_PER_MINUTE },
- { "usec", 1ULL },
- { "us", 1ULL },
- { "", USEC_PER_SEC },
- };
+int copy_file(const char *from, const char *to) {
+ int r, fdf, fdt;
- const char *p;
- usec_t r = 0;
+ assert(from);
+ assert(to);
- assert(t);
- assert(usec);
+ fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY);
+ if (fdf < 0)
+ return -errno;
- p = t;
- do {
- long long l;
- char *e;
- unsigned i;
+ fdt = open(to, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY, 0644);
+ if (fdt < 0) {
+ close_nointr_nofail(fdf);
+ return -errno;
+ }
- errno = 0;
- l = strtoll(p, &e, 10);
+ for (;;) {
+ char buf[PIPE_BUF];
+ ssize_t n, k;
- if (errno != 0)
- return -errno;
+ n = read(fdf, buf, sizeof(buf));
+ if (n < 0) {
+ r = -errno;
- if (l < 0)
- return -ERANGE;
+ close_nointr_nofail(fdf);
+ close_nointr(fdt);
+ unlink(to);
- if (e == p)
- return -EINVAL;
+ return r;
+ }
- e += strspn(e, WHITESPACE);
+ if (n == 0)
+ break;
- for (i = 0; i < ELEMENTSOF(table); i++)
- if (startswith(e, table[i].suffix)) {
- r += (usec_t) l * table[i].usec;
- p = e + strlen(table[i].suffix);
- break;
- }
+ errno = 0;
+ k = loop_write(fdt, buf, n, false);
+ if (n != k) {
+ r = k < 0 ? k : (errno ? -errno : -EIO);
- if (i >= ELEMENTSOF(table))
- return -EINVAL;
+ close_nointr_nofail(fdf);
+ close_nointr(fdt);
- } while (*p != 0);
+ unlink(to);
+ return r;
+ }
+ }
- *usec = r;
+ close_nointr_nofail(fdf);
+ r = close_nointr(fdt);
+
+ if (r < 0) {
+ unlink(to);
+ return r;
+ }
return 0;
}
-int make_stdio(int fd) {
- int r, s, t;
+int symlink_or_copy(const char *from, const char *to) {
+ char *pf = NULL, *pt = NULL;
+ struct stat a, b;
+ int r;
- assert(fd >= 0);
+ assert(from);
+ assert(to);
- r = dup2(fd, STDIN_FILENO);
- s = dup2(fd, STDOUT_FILENO);
- t = dup2(fd, STDERR_FILENO);
+ if (parent_of_path(from, &pf) < 0 ||
+ parent_of_path(to, &pt) < 0) {
+ r = -ENOMEM;
+ goto finish;
+ }
- if (fd >= 3)
- close_nointr_nofail(fd);
+ if (stat(pf, &a) < 0 ||
+ stat(pt, &b) < 0) {
+ r = -errno;
+ goto finish;
+ }
- if (r < 0 || s < 0 || t < 0)
- return -errno;
+ if (a.st_dev != b.st_dev) {
+ free(pf);
+ free(pt);
- return 0;
-}
+ return copy_file(from, to);
+ }
-bool is_clean_exit(int code, int status) {
+ if (symlink(from, to) < 0) {
+ r = -errno;
+ goto finish;
+ }
- if (code == CLD_EXITED)
- return status == 0;
+ r = 0;
- /* If a daemon does not implement handlers for some of the
- * signals that's not considered an unclean shutdown */
- if (code == CLD_KILLED)
- return
- status == SIGHUP ||
- status == SIGINT ||
- status == SIGTERM ||
- status == SIGPIPE;
+finish:
+ free(pf);
+ free(pt);
- return false;
+ return r;
}
-bool is_device_path(const char *path) {
+int symlink_or_copy_atomic(const char *from, const char *to) {
+ char *t, *x;
+ const char *fn;
+ size_t k;
+ unsigned long long ull;
+ unsigned i;
+ int r;
- /* Returns true on paths that refer to a device, either in
- * sysfs or in /dev */
+ assert(from);
+ assert(to);
- return
- path_startswith(path, "/dev/") ||
- path_startswith(path, "/sys/");
-}
+ t = new(char, strlen(to) + 1 + 16 + 1);
+ if (!t)
+ return -ENOMEM;
-int dir_is_empty(const char *path) {
- DIR *d;
- int r;
- struct dirent buf, *de;
+ fn = file_name_from_path(to);
+ k = fn-to;
+ memcpy(t, to, k);
+ t[k] = '.';
+ x = stpcpy(t+k+1, fn);
- if (!(d = opendir(path)))
- return -errno;
+ ull = random_ull();
+ for (i = 0; i < 16; i++) {
+ *(x++) = hexchar(ull & 0xF);
+ ull >>= 4;
+ }
- for (;;) {
- if ((r = readdir_r(d, &buf, &de)) > 0) {
- r = -r;
- break;
- }
+ *x = 0;
- if (!de) {
- r = 1;
- break;
- }
+ r = symlink_or_copy(from, t);
+ if (r < 0) {
+ unlink(t);
+ free(t);
+ return r;
+ }
- if (!ignore_file(de->d_name)) {
- r = 0;
- break;
- }
+ if (rename(t, to) < 0) {
+ r = -errno;
+ unlink(t);
+ free(t);
+ return r;
}
- closedir(d);
+ free(t);
return r;
}
-unsigned long long random_ull(void) {
- int fd;
- uint64_t ull;
- ssize_t r;
-
- if ((fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY)) < 0)
- goto fallback;
+int audit_session_from_pid(pid_t pid, uint32_t *id) {
+ char *p, *s;
+ uint32_t u;
+ int r;
- r = loop_read(fd, &ull, sizeof(ull), true);
- close_nointr_nofail(fd);
+ assert(pid >= 1);
+ assert(id);
- if (r != sizeof(ull))
- goto fallback;
+ if (have_effective_cap(CAP_AUDIT_CONTROL) <= 0)
+ return -ENOENT;
- return ull;
+ if (asprintf(&p, "/proc/%lu/sessionid", (unsigned long) pid) < 0)
+ return -ENOMEM;
-fallback:
- return random() * RAND_MAX + random();
-}
+ r = read_one_line_file(p, &s);
+ free(p);
+ if (r < 0)
+ return r;
-void rename_process(const char name[8]) {
- assert(name);
+ r = safe_atou32(s, &u);
+ free(s);
- prctl(PR_SET_NAME, name);
+ if (r < 0)
+ return r;
- /* This is a like a poor man's setproctitle(). The string
- * passed should fit in 7 chars (i.e. the length of
- * "systemd") */
+ if (u == (uint32_t) -1 || u <= 0)
+ return -ENOENT;
- if (program_invocation_name)
- strncpy(program_invocation_name, name, strlen(program_invocation_name));
+ *id = u;
+ return 0;
}
-void sigset_add_many(sigset_t *ss, ...) {
- va_list ap;
- int sig;
-
- assert(ss);
+bool display_is_local(const char *display) {
+ assert(display);
- va_start(ap, ss);
- while ((sig = va_arg(ap, int)) > 0)
- assert_se(sigaddset(ss, sig) == 0);
- va_end(ap);
+ return
+ display[0] == ':' &&
+ display[1] >= '0' &&
+ display[1] <= '9';
}
-char* gethostname_malloc(void) {
- struct utsname u;
+int socket_from_display(const char *display, char **path) {
+ size_t k;
+ char *f, *c;
- assert_se(uname(&u) >= 0);
+ assert(display);
+ assert(path);
- if (u.nodename[0])
- return strdup(u.nodename);
+ if (!display_is_local(display))
+ return -EINVAL;
- return strdup(u.sysname);
-}
+ k = strspn(display+1, "0123456789");
-int getmachineid_malloc(char **b) {
- int r;
+ f = new(char, sizeof("/tmp/.X11-unix/X") + k);
+ if (!f)
+ return -ENOMEM;
- assert(b);
+ c = stpcpy(f, "/tmp/.X11-unix/X");
+ memcpy(c, display+1, k);
+ c[k] = 0;
- if ((r = read_one_line_file("/var/lib/dbus/machine-id", b)) < 0)
- return r;
+ *path = f;
- strstrip(*b);
return 0;
}
-char* getlogname_malloc(void) {
- uid_t uid;
- long bufsize;
- char *buf, *name;
- struct passwd pwbuf, *pw = NULL;
- struct stat st;
+int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home) {
+ struct passwd *p;
+ uid_t u;
- if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0)
- uid = st.st_uid;
- else
- uid = getuid();
+ assert(username);
+ assert(*username);
- /* Shortcut things to avoid NSS lookups */
- if (uid == 0)
- return strdup("root");
+ /* We enforce some special rules for uid=0: in order to avoid
+ * NSS lookups for root we hardcode its data. */
- if ((bufsize = sysconf(_SC_GETPW_R_SIZE_MAX)) <= 0)
- bufsize = 4096;
+ if (streq(*username, "root") || streq(*username, "0")) {
+ *username = "root";
- if (!(buf = malloc(bufsize)))
- return NULL;
+ if (uid)
+ *uid = 0;
- if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw) {
- name = strdup(pw->pw_name);
- free(buf);
- return name;
+ if (gid)
+ *gid = 0;
+
+ if (home)
+ *home = "/root";
+ return 0;
}
- free(buf);
+ if (parse_uid(*username, &u) >= 0) {
+ errno = 0;
+ p = getpwuid(u);
+
+ /* If there are multiple users with the same id, make
+ * sure to leave $USER to the configured value instead
+ * of the first occurrence in the database. However if
+ * the uid was configured by a numeric uid, then let's
+ * pick the real username from /etc/passwd. */
+ if (p)
+ *username = p->pw_name;
+ } else {
+ errno = 0;
+ p = getpwnam(*username);
+ }
- if (asprintf(&name, "%lu", (unsigned long) uid) < 0)
- return NULL;
+ if (!p)
+ return errno != 0 ? -errno : -ESRCH;
- return name;
-}
+ if (uid)
+ *uid = p->pw_uid;
-int getttyname_malloc(char **r) {
- char path[PATH_MAX], *p, *c;
+ if (gid)
+ *gid = p->pw_gid;
- assert(r);
+ if (home)
+ *home = p->pw_dir;
- if (ttyname_r(STDIN_FILENO, path, sizeof(path)) < 0)
- return -errno;
+ return 0;
+}
- char_array_0(path);
+int get_group_creds(const char **groupname, gid_t *gid) {
+ struct group *g;
+ gid_t id;
- p = path;
- if (startswith(path, "/dev/"))
- p += 5;
+ assert(groupname);
- if (!(c = strdup(p)))
- return -ENOMEM;
+ /* We enforce some special rules for gid=0: in order to avoid
+ * NSS lookups for root we hardcode its data. */
- *r = c;
- return 0;
-}
+ if (streq(*groupname, "root") || streq(*groupname, "0")) {
+ *groupname = "root";
-static int rm_rf_children(int fd, bool only_dirs) {
- DIR *d;
- int ret = 0;
+ if (gid)
+ *gid = 0;
- assert(fd >= 0);
+ return 0;
+ }
- /* This returns the first error we run into, but nevertheless
- * tries to go on */
+ if (parse_gid(*groupname, &id) >= 0) {
+ errno = 0;
+ g = getgrgid(id);
- if (!(d = fdopendir(fd))) {
- close_nointr_nofail(fd);
- return -errno;
+ if (g)
+ *groupname = g->gr_name;
+ } else {
+ errno = 0;
+ g = getgrnam(*groupname);
}
- for (;;) {
- struct dirent buf, *de;
- bool is_dir;
- int r;
+ if (!g)
+ return errno != 0 ? -errno : -ESRCH;
- if ((r = readdir_r(d, &buf, &de)) != 0) {
- if (ret == 0)
- ret = -r;
- break;
- }
+ if (gid)
+ *gid = g->gr_gid;
- if (!de)
- break;
+ return 0;
+}
- if (streq(de->d_name, ".") || streq(de->d_name, ".."))
- continue;
+int glob_exists(const char *path) {
+ glob_t g;
+ int r, k;
- if (de->d_type == DT_UNKNOWN) {
- struct stat st;
+ assert(path);
- if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
- if (ret == 0)
- ret = -errno;
- continue;
- }
+ zero(g);
+ errno = 0;
+ k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g);
- is_dir = S_ISDIR(st.st_mode);
- } else
- is_dir = de->d_type == DT_DIR;
+ if (k == GLOB_NOMATCH)
+ r = 0;
+ else if (k == GLOB_NOSPACE)
+ r = -ENOMEM;
+ else if (k == 0)
+ r = !strv_isempty(g.gl_pathv);
+ else
+ r = errno ? -errno : -EIO;
- if (is_dir) {
- int subdir_fd;
+ globfree(&g);
- if ((subdir_fd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) {
- if (ret == 0)
- ret = -errno;
- continue;
- }
+ return r;
+}
- if ((r = rm_rf_children(subdir_fd, only_dirs)) < 0) {
- if (ret == 0)
- ret = r;
- }
+int dirent_ensure_type(DIR *d, struct dirent *de) {
+ struct stat st;
- if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) {
- if (ret == 0)
- ret = -errno;
- }
- } else if (!only_dirs) {
+ assert(d);
+ assert(de);
- if (unlinkat(fd, de->d_name, 0) < 0) {
- if (ret == 0)
- ret = -errno;
- }
- }
- }
+ if (de->d_type != DT_UNKNOWN)
+ return 0;
- closedir(d);
+ if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0)
+ return -errno;
- return ret;
+ de->d_type =
+ S_ISREG(st.st_mode) ? DT_REG :
+ S_ISDIR(st.st_mode) ? DT_DIR :
+ S_ISLNK(st.st_mode) ? DT_LNK :
+ S_ISFIFO(st.st_mode) ? DT_FIFO :
+ S_ISSOCK(st.st_mode) ? DT_SOCK :
+ S_ISCHR(st.st_mode) ? DT_CHR :
+ S_ISBLK(st.st_mode) ? DT_BLK :
+ DT_UNKNOWN;
+
+ return 0;
}
-int rm_rf(const char *path, bool only_dirs, bool delete_root) {
- int fd;
+int in_search_path(const char *path, char **search) {
+ char **i, *parent;
int r;
- assert(path);
-
- if ((fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) {
-
- if (errno != ENOTDIR)
- return -errno;
+ r = parent_of_path(path, &parent);
+ if (r < 0)
+ return r;
- if (delete_root && !only_dirs)
- if (unlink(path) < 0)
- return -errno;
+ r = 0;
- return 0;
+ STRV_FOREACH(i, search) {
+ if (path_equal(parent, *i)) {
+ r = 1;
+ break;
+ }
}
- r = rm_rf_children(fd, only_dirs);
-
- if (delete_root)
- if (rmdir(path) < 0) {
- if (r == 0)
- r = -errno;
- }
+ free(parent);
return r;
}
-int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) {
- assert(path);
+int get_files_in_directory(const char *path, char ***list) {
+ DIR *d;
+ int r = 0;
+ unsigned n = 0;
+ char **l = NULL;
- /* Under the assumption that we are running privileged we
- * first change the access mode and only then hand out
- * ownership to avoid a window where access is too open. */
+ assert(path);
- if (chmod(path, mode) < 0)
- return -errno;
+ /* Returns all files in a directory in *list, and the number
+ * of files as return value. If list is NULL returns only the
+ * number */
- if (chown(path, uid, gid) < 0)
- return -errno;
+ d = opendir(path);
+ for (;;) {
+ struct dirent buffer, *de;
+ int k;
- return 0;
-}
+ k = readdir_r(d, &buffer, &de);
+ if (k != 0) {
+ r = -k;
+ goto finish;
+ }
-cpu_set_t* cpu_set_malloc(unsigned *ncpus) {
- cpu_set_t *r;
- unsigned n = 1024;
+ if (!de)
+ break;
- /* Allocates the cpuset in the right size */
+ dirent_ensure_type(d, de);
- for (;;) {
- if (!(r = CPU_ALLOC(n)))
- return NULL;
+ if (!dirent_is_file(de))
+ continue;
- if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) {
- CPU_ZERO_S(CPU_ALLOC_SIZE(n), r);
+ if (list) {
+ if ((unsigned) r >= n) {
+ char **t;
- if (ncpus)
- *ncpus = n;
+ n = MAX(16, 2*r);
+ t = realloc(l, sizeof(char*) * n);
+ if (!t) {
+ r = -ENOMEM;
+ goto finish;
+ }
- return r;
- }
+ l = t;
+ }
- CPU_FREE(r);
+ assert((unsigned) r < n);
- if (errno != EINVAL)
- return NULL;
+ l[r] = strdup(de->d_name);
+ if (!l[r]) {
+ r = -ENOMEM;
+ goto finish;
+ }
- n *= 2;
+ l[++r] = NULL;
+ } else
+ r++;
}
-}
-
-void status_vprintf(const char *format, va_list ap) {
- char *s = NULL;
- int fd = -1;
- assert(format);
+finish:
+ if (d)
+ closedir(d);
- /* This independent of logging, as status messages are
- * optional and go exclusively to the console. */
+ if (r >= 0) {
+ if (list)
+ *list = l;
+ } else
+ strv_free(l);
- if (vasprintf(&s, format, ap) < 0)
- goto finish;
+ return r;
+}
- if ((fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0)
- goto finish;
+char *join(const char *x, ...) {
+ va_list ap;
+ size_t l;
+ char *r, *p;
- write(fd, s, strlen(s));
+ va_start(ap, x);
-finish:
- free(s);
+ if (x) {
+ l = strlen(x);
- if (fd >= 0)
- close_nointr_nofail(fd);
-}
+ for (;;) {
+ const char *t;
-void status_printf(const char *format, ...) {
- va_list ap;
+ t = va_arg(ap, const char *);
+ if (!t)
+ break;
- assert(format);
+ l += strlen(t);
+ }
+ } else
+ l = 0;
- va_start(ap, format);
- status_vprintf(format, ap);
va_end(ap);
-}
-
-void status_welcome(void) {
-#if defined(TARGET_FEDORA)
- char *r;
+ r = new(char, l+1);
+ if (!r)
+ return NULL;
- if (read_one_line_file("/etc/system-release", &r) < 0)
- return;
+ if (x) {
+ p = stpcpy(r, x);
- truncate_nl(r);
+ va_start(ap, x);
- /* This tries to mimic the color magic the old Red Hat sysinit
- * script did. */
+ for (;;) {
+ const char *t;
- if (startswith(r, "Red Hat"))
- status_printf("Welcome to \x1B[0;31m%s\x1B[0m!\n", r); /* Red for RHEL */
- else if (startswith(r, "Fedora"))
- status_printf("Welcome to \x1B[0;34m%s\x1B[0m!\n", r); /* Blue for Fedora */
- else
- status_printf("Welcome to %s!\n", r);
+ t = va_arg(ap, const char *);
+ if (!t)
+ break;
- free(r);
+ p = stpcpy(p, t);
+ }
+ } else
+ r[0] = 0;
-#elif defined(TARGET_SUSE)
- char *r;
+ return r;
+}
- if (read_one_line_file("/etc/SuSE-release", &r) < 0)
- return;
+bool is_main_thread(void) {
+ static __thread int cached = 0;
- truncate_nl(r);
+ if (_unlikely_(cached == 0))
+ cached = getpid() == gettid() ? 1 : -1;
- status_printf("Welcome to \x1B[0;32m%s\x1B[0m!\n", r); /* Green for SUSE */
- free(r);
-#else
-#warning "You probably should add a welcome text logic here."
-#endif
+ return cached > 0;
}
static const char *const ioprio_class_table[] = {
DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int);
-static const char *const log_facility_table[LOG_NFACILITIES] = {
+static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = {
[LOG_FAC(LOG_KERN)] = "kern",
[LOG_FAC(LOG_USER)] = "user",
[LOG_FAC(LOG_MAIL)] = "mail",
[LOG_FAC(LOG_LOCAL7)] = "local7"
};
-DEFINE_STRING_TABLE_LOOKUP(log_facility, int);
+DEFINE_STRING_TABLE_LOOKUP(log_facility_unshifted, int);
static const char *const log_level_table[] = {
[LOG_EMERG] = "emerg",
};
DEFINE_STRING_TABLE_LOOKUP(ip_tos, int);
+
+static const char *const signal_table[] = {
+ [SIGHUP] = "HUP",
+ [SIGINT] = "INT",
+ [SIGQUIT] = "QUIT",
+ [SIGILL] = "ILL",
+ [SIGTRAP] = "TRAP",
+ [SIGABRT] = "ABRT",
+ [SIGBUS] = "BUS",
+ [SIGFPE] = "FPE",
+ [SIGKILL] = "KILL",
+ [SIGUSR1] = "USR1",
+ [SIGSEGV] = "SEGV",
+ [SIGUSR2] = "USR2",
+ [SIGPIPE] = "PIPE",
+ [SIGALRM] = "ALRM",
+ [SIGTERM] = "TERM",
+#ifdef SIGSTKFLT
+ [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */
+#endif
+ [SIGCHLD] = "CHLD",
+ [SIGCONT] = "CONT",
+ [SIGSTOP] = "STOP",
+ [SIGTSTP] = "TSTP",
+ [SIGTTIN] = "TTIN",
+ [SIGTTOU] = "TTOU",
+ [SIGURG] = "URG",
+ [SIGXCPU] = "XCPU",
+ [SIGXFSZ] = "XFSZ",
+ [SIGVTALRM] = "VTALRM",
+ [SIGPROF] = "PROF",
+ [SIGWINCH] = "WINCH",
+ [SIGIO] = "IO",
+ [SIGPWR] = "PWR",
+ [SIGSYS] = "SYS"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(signal, int);