+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <assert.h>
-#include <string.h>
-#include <unistd.h>
-#include <errno.h>
-#include <stdlib.h>
-#include <signal.h>
-#include <stdio.h>
-#include <syslog.h>
-#include <sched.h>
-#include <sys/resource.h>
-#include <linux/sched.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <dirent.h>
-#include <sys/ioctl.h>
-#include <linux/vt.h>
-#include <linux/tiocl.h>
-#include <termios.h>
-#include <stdarg.h>
-#include <sys/inotify.h>
-#include <sys/poll.h>
-#include <libgen.h>
-#include <ctype.h>
-#include <sys/prctl.h>
-#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 <sys/mman.h>
-
-#include "macro.h"
-#include "util.h"
-#include "ioprio.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 > 0))
- return pgsz;
-
- assert_se((r = sysconf(_SC_PAGESIZE)) > 0);
-
- pgsz = (size_t) r;
-
- return pgsz;
-}
-
-bool streq_ptr(const char *a, const char *b) {
-
- /* Like streq(), but tries to make sense of NULL pointers */
-
- if (a && b)
- return streq(a, b);
-
- if (!a && !b)
- return true;
-
- return false;
-}
-
-usec_t now(clockid_t clock_id) {
- struct timespec ts;
-
- assert_se(clock_gettime(clock_id, &ts) == 0);
-
- return timespec_load(&ts);
-}
-
-dual_timestamp* dual_timestamp_get(dual_timestamp *ts) {
- assert(ts);
-
- ts->realtime = now(CLOCK_REALTIME);
- ts->monotonic = now(CLOCK_MONOTONIC);
-
- 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);
-
- return
- (usec_t) ts->tv_sec * USEC_PER_SEC +
- (usec_t) ts->tv_nsec / NSEC_PER_USEC;
-}
-
-struct timespec *timespec_store(struct timespec *ts, usec_t u) {
- assert(ts);
-
- ts->tv_sec = (time_t) (u / USEC_PER_SEC);
- ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC);
-
- return ts;
-}
-
-usec_t timeval_load(const struct timeval *tv) {
- assert(tv);
-
- return
- (usec_t) tv->tv_sec * USEC_PER_SEC +
- (usec_t) tv->tv_usec;
-}
-
-struct timeval *timeval_store(struct timeval *tv, usec_t u) {
- assert(tv);
-
- tv->tv_sec = (time_t) (u / USEC_PER_SEC);
- tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC);
-
- return tv;
-}
-
-bool endswith(const char *s, const char *postfix) {
- size_t sl, pl;
-
- assert(s);
- assert(postfix);
-
- sl = strlen(s);
- pl = strlen(postfix);
-
- if (pl == 0)
- return true;
-
- if (sl < pl)
- return false;
-
- return memcmp(s + sl - pl, postfix, pl) == 0;
-}
-
-bool startswith(const char *s, const char *prefix) {
- size_t sl, pl;
-
- assert(s);
- assert(prefix);
-
- sl = strlen(s);
- pl = strlen(prefix);
-
- if (pl == 0)
- return true;
-
- if (sl < pl)
- return false;
-
- return memcmp(s, prefix, pl) == 0;
-}
-
-bool startswith_no_case(const char *s, const char *prefix) {
- size_t sl, pl;
- unsigned i;
-
- assert(s);
- assert(prefix);
-
- sl = strlen(s);
- pl = strlen(prefix);
-
- if (pl == 0)
- return true;
-
- if (sl < pl)
- return false;
-
- for(i = 0; i < pl; ++i) {
- if (tolower(s[i]) != tolower(prefix[i]))
- return false;
- }
-
- return true;
-}
-
-bool first_word(const char *s, const char *word) {
- size_t sl, wl;
-
- assert(s);
- assert(word);
-
- sl = strlen(s);
- wl = strlen(word);
-
- if (sl < wl)
- return false;
-
- if (wl == 0)
- return true;
-
- if (memcmp(s, word, wl) != 0)
- return false;
-
- return s[wl] == 0 ||
- strchr(WHITESPACE, s[wl]);
-}
-
-int close_nointr(int fd) {
- assert(fd >= 0);
-
- for (;;) {
- int r;
-
- r = close(fd);
- if (r >= 0)
- return r;
-
- if (errno != EINTR)
- return -errno;
- }
-}
-
-void close_nointr_nofail(int fd) {
- int saved_errno = errno;
-
- /* like close_nointr() but cannot fail, and guarantees errno
- * is unchanged */
-
- assert_se(close_nointr(fd) == 0);
-
- errno = saved_errno;
-}
-
-void close_many(const int fds[], unsigned n_fd) {
- unsigned i;
-
- for (i = 0; i < n_fd; i++)
- close_nointr_nofail(fds[i]);
-}
-
-int parse_boolean(const char *v) {
- assert(v);
-
- if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on"))
- return 1;
- else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off"))
- return 0;
-
- return -EINVAL;
-}
-
-int parse_pid(const char *s, pid_t* ret_pid) {
- unsigned long ul = 0;
- pid_t pid;
- int r;
-
- assert(s);
- assert(ret_pid);
-
- if ((r = safe_atolu(s, &ul)) < 0)
- return r;
-
- pid = (pid_t) ul;
-
- if ((unsigned long) pid != ul)
- return -ERANGE;
-
- if (pid <= 0)
- return -ERANGE;
-
- *ret_pid = pid;
- 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;
-
- assert(s);
- assert(ret_u);
-
- errno = 0;
- l = strtoul(s, &x, 0);
-
- if (!x || *x || errno)
- return errno ? -errno : -EINVAL;
-
- if ((unsigned long) (unsigned) l != l)
- return -ERANGE;
-
- *ret_u = (unsigned) l;
- return 0;
-}
-
-int safe_atoi(const char *s, int *ret_i) {
- char *x = NULL;
- long l;
-
- assert(s);
- assert(ret_i);
-
- errno = 0;
- l = strtol(s, &x, 0);
-
- if (!x || *x || errno)
- return errno ? -errno : -EINVAL;
-
- if ((long) (int) l != l)
- return -ERANGE;
-
- *ret_i = (int) l;
- return 0;
-}
-
-int safe_atollu(const char *s, long long unsigned *ret_llu) {
- char *x = NULL;
- unsigned long long l;
-
- assert(s);
- assert(ret_llu);
-
- errno = 0;
- l = strtoull(s, &x, 0);
-
- if (!x || *x || errno)
- return errno ? -errno : -EINVAL;
-
- *ret_llu = l;
- return 0;
-}
-
-int safe_atolli(const char *s, long long int *ret_lli) {
- char *x = NULL;
- long long l;
-
- assert(s);
- assert(ret_lli);
-
- errno = 0;
- l = strtoll(s, &x, 0);
-
- if (!x || *x || errno)
- return errno ? -errno : -EINVAL;
-
- *ret_lli = l;
- return 0;
-}
-
-/* Split a string into words. */
-char *split(const char *c, size_t *l, const char *separator, char **state) {
- char *current;
-
- current = *state ? *state : (char*) c;
-
- if (!*current || *c == 0)
- return NULL;
-
- current += strspn(current, separator);
- *l = strcspn(current, separator);
- *state = current+*l;
-
- return (char*) current;
-}
-
-/* Split a string into words, but consider strings enclosed in '' and
- * "" as words even if they include spaces. */
-char *split_quoted(const char *c, size_t *l, char **state) {
- char *current, *e;
- bool escaped = false;
-
- current = *state ? *state : (char*) c;
-
- if (!*current || *c == 0)
- return NULL;
-
- current += strspn(current, WHITESPACE);
-
- if (*current == '\'') {
- current ++;
-
- for (e = current; *e; e++) {
- if (escaped)
- escaped = false;
- else if (*e == '\\')
- escaped = true;
- else if (*e == '\'')
- break;
- }
-
- *l = e-current;
- *state = *e == 0 ? e : e+1;
- } else if (*current == '\"') {
- current ++;
-
- for (e = current; *e; e++) {
- if (escaped)
- escaped = false;
- else if (*e == '\\')
- escaped = true;
- else if (*e == '\"')
- break;
- }
-
- *l = e-current;
- *state = *e == 0 ? e : e+1;
- } else {
- for (e = current; *e; e++) {
- if (escaped)
- escaped = false;
- else if (*e == '\\')
- escaped = true;
- else if (strchr(WHITESPACE, *e))
- break;
- }
- *l = e-current;
- *state = e;
- }
-
- return (char*) current;
-}
-
-char **split_path_and_make_absolute(const char *p) {
- char **l;
- assert(p);
-
- if (!(l = strv_split(p, ":")))
- return NULL;
-
- if (!strv_path_make_absolute_cwd(l)) {
- strv_free(l);
- return NULL;
- }
-
- return l;
-}
-
-int get_parent_of_pid(pid_t pid, pid_t *_ppid) {
- int r;
- FILE *f;
- char fn[PATH_MAX], line[LINE_MAX], *p;
- long unsigned ppid;
-
- assert(pid > 0);
- assert(_ppid);
-
- 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 = feof(f) ? -EIO : -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 */
- "%lu ", /* ppid */
- &ppid) != 1)
- return -EIO;
-
- if ((long unsigned) (pid_t) ppid != ppid)
- return -ERANGE;
-
- *_ppid = (pid_t) ppid;
-
- 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 = feof(f) ? -EIO : -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;
-
- assert(fn);
- assert(line);
-
- if (!(f = fopen(fn, "we")))
- return -errno;
-
- 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
- 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[LINE_MAX], *c;
-
- assert(fn);
- assert(line);
-
- f = fopen(fn, "re");
- if (!f)
- return -errno;
-
- if (!fgets(t, sizeof(t), f)) {
-
- if (ferror(f)) {
- r = -errno;
- goto finish;
- }
-
- t[0] = 0;
- }
-
- c = strdup(t);
- if (!c) {
- r = -ENOMEM;
- goto finish;
- }
-
- truncate_nl(c);
-
- *line = c;
- r = 0;
-
-finish:
- fclose(f);
- return r;
-}
-
-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;
-
- if (!(f = fopen(fn, "re")))
- return -errno;
-
- if (fstat(fileno(f), &st) < 0) {
- r = -errno;
- goto finish;
- }
-
- /* Safety check */
- if (st.st_size > 4*1024*1024) {
- r = -E2BIG;
- goto finish;
- }
-
- n = st.st_size > 0 ? st.st_size : LINE_MAX;
- l = 0;
-
- for (;;) {
- char *t;
- size_t k;
-
- if (!(t = realloc(buf, n+1))) {
- r = -ENOMEM;
- goto finish;
- }
-
- buf = t;
- k = fread(buf + l, 1, n - l, f);
-
- if (k <= 0) {
- if (ferror(f)) {
- r = -errno;
- goto finish;
- }
-
- break;
- }
-
- l += k;
- n *= 2;
-
- /* Safety check */
- if (n > 4*1024*1024) {
- r = -E2BIG;
- goto finish;
- }
- }
-
- buf[l] = 0;
- *contents = buf;
- buf = NULL;
-
- if (size)
- *size = l;
-
- r = 0;
-
-finish:
- fclose(f);
- free(buf);
-
- return r;
-}
-
-int parse_env_file(
- const char *fname,
- const char *separator, ...) {
-
- int r = 0;
- char *contents = NULL, *p;
-
- assert(fname);
- assert(separator);
-
- if ((r = read_full_file(fname, &contents, NULL)) < 0)
- return r;
-
- p = contents;
- for (;;) {
- const char *key = NULL;
-
- p += strspn(p, separator);
- p += strspn(p, WHITESPACE);
-
- if (!*p)
- break;
-
- if (!strchr(COMMENTS, *p)) {
- va_list ap;
- char **value;
-
- va_start(ap, separator);
- while ((key = va_arg(ap, char *))) {
- size_t n;
- char *v;
-
- value = va_arg(ap, char **);
-
- n = strlen(key);
- if (strncmp(p, key, n) != 0 ||
- p[n] != '=')
- continue;
-
- p += n + 1;
- n = strcspn(p, separator);
-
- if (n >= 2 &&
- strchr(QUOTES, p[0]) &&
- p[n-1] == p[0])
- v = strndup(p+1, n-2);
- else
- v = strndup(p, n);
-
- if (!v) {
- r = -ENOMEM;
- va_end(ap);
- goto fail;
- }
-
- if (v[0] == '\0') {
- /* return empty value strings as NULL */
- free(v);
- v = NULL;
- }
-
- free(*value);
- *value = v;
-
- p += n;
-
- r ++;
- break;
- }
- va_end(ap);
- }
-
- if (!key)
- p += strcspn(p, separator);
- }
-
-fail:
- free(contents);
- return r;
-}
-
-int load_env_file(
- const char *fname,
- char ***rl) {
-
- FILE *f;
- char **m = NULL;
- int r;
-
- assert(fname);
- assert(rl);
-
- if (!(f = fopen(fname, "re")))
- return -errno;
-
- while (!feof(f)) {
- char l[LINE_MAX], *p, *u;
- char **t;
-
- if (!fgets(l, sizeof(l), f)) {
- if (feof(f))
- break;
-
- r = -errno;
- goto finish;
- }
-
- p = strstrip(l);
-
- if (!*p)
- continue;
-
- if (strchr(COMMENTS, *p))
- continue;
-
- if (!(u = normalize_env_assignment(p))) {
- log_error("Out of memory");
- r = -ENOMEM;
- goto finish;
- }
-
- t = strv_append(m, u);
- free(u);
-
- if (!t) {
- log_error("Out of memory");
- r = -ENOMEM;
- goto finish;
- }
-
- strv_free(m);
- m = t;
- }
-
- r = 0;
-
- *rl = m;
- m = NULL;
-
-finish:
- if (f)
- fclose(f);
-
- strv_free(m);
-
- return r;
-}
-
-int write_env_file(const char *fname, char **l) {
- char **i, *p;
- FILE *f;
- int r;
-
- r = fopen_temporary(fname, &f, &p);
- if (r < 0)
- return r;
-
- fchmod_umask(fileno(f), 0644);
-
- errno = 0;
- STRV_FOREACH(i, l) {
- fputs(*i, f);
- fputc('\n', f);
- }
-
- fflush(f);
-
- if (ferror(f)) {
- if (errno != 0)
- r = -errno;
- else
- r = -EIO;
- } else {
- if (rename(p, fname) < 0)
- r = -errno;
- else
- r = 0;
- }
-
- if (r < 0)
- unlink(p);
-
- fclose(f);
- free(p);
-
- return r;
-}
-
-char *truncate_nl(char *s) {
- assert(s);
-
- s[strcspn(s, NEWLINE)] = 0;
- return s;
-}
-
-int get_process_comm(pid_t pid, char **name) {
- int r;
-
- assert(name);
-
- if (pid == 0)
- r = read_one_line_file("/proc/self/comm", name);
- else {
- char *p;
- if (asprintf(&p, "/proc/%lu/comm", (unsigned long) pid) < 0)
- return -ENOMEM;
-
- r = read_one_line_file(p, name);
- free(p);
- }
-
- return r;
-}
-
-int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) {
- char *r, *k;
- int c;
- bool space = false;
- size_t left;
- FILE *f;
-
- assert(max_length > 0);
- assert(line);
-
- if (pid == 0)
- f = fopen("/proc/self/cmdline", "re");
- else {
- char *p;
- if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0)
- return -ENOMEM;
-
- f = fopen(p, "re");
- free(p);
- }
-
- if (!f)
- return -errno;
-
- r = new(char, max_length);
- if (!r) {
- fclose(f);
- return -ENOMEM;
- }
-
- k = r;
- left = max_length;
- while ((c = getc(f)) != EOF) {
-
- if (isprint(c)) {
- if (space) {
- if (left <= 4)
- break;
-
- *(k++) = ' ';
- left--;
- space = false;
- }
-
- if (left <= 4)
- break;
-
- *(k++) = (char) c;
- left--;
- } else
- space = true;
- }
-
- if (left <= 4) {
- size_t n = MIN(left-1, 3U);
- memcpy(k, "...", n);
- k[n] = 0;
- } else
- *k = 0;
-
- fclose(f);
-
- /* Kernel threads have no argv[] */
- if (r[0] == 0) {
- char *t;
- int h;
-
- free(r);
-
- if (!comm_fallback)
- return -ENOENT;
-
- h = get_process_comm(pid, &t);
- if (h < 0)
- return h;
-
- r = join("[", t, "]", NULL);
- free(t);
-
- if (!r)
- return -ENOMEM;
- }
-
- *line = r;
- return 0;
-}
-
-int is_kernel_thread(pid_t pid) {
- char *p;
- size_t count;
- char c;
- bool eof;
- FILE *f;
-
- if (pid == 0)
- return 0;
-
- if (asprintf(&p, "/proc/%lu/cmdline", (unsigned long) pid) < 0)
- return -ENOMEM;
-
- f = fopen(p, "re");
- free(p);
-
- if (!f)
- return -errno;
-
- count = fread(&c, 1, 1, f);
- eof = feof(f);
- fclose(f);
-
- /* Kernel threads have an empty cmdline */
-
- if (count <= 0)
- return eof ? 1 : -errno;
-
- return 0;
-}
-
-int get_process_exe(pid_t pid, char **name) {
- int r;
-
- assert(name);
-
- if (pid == 0)
- r = readlink_malloc("/proc/self/exe", name);
- else {
- char *p;
- if (asprintf(&p, "/proc/%lu/exe", (unsigned long) pid) < 0)
- return -ENOMEM;
-
- r = readlink_malloc(p, name);
- free(p);
- }
-
- return r;
-}
-
-int get_process_uid(pid_t pid, uid_t *uid) {
- char *p;
- FILE *f;
- int r;
-
- assert(uid);
-
- if (pid == 0)
- return getuid();
-
- if (asprintf(&p, "/proc/%lu/status", (unsigned long) pid) < 0)
- return -ENOMEM;
-
- f = fopen(p, "re");
- free(p);
-
- if (!f)
- return -errno;
-
- while (!feof(f)) {
- char line[LINE_MAX], *l;
-
- if (!fgets(line, sizeof(line), f)) {
- if (feof(f))
- break;
-
- r = -errno;
- goto finish;
- }
-
- l = strstrip(line);
-
- if (startswith(l, "Uid:")) {
- l += 4;
- l += strspn(l, WHITESPACE);
-
- l[strcspn(l, WHITESPACE)] = 0;
-
- r = parse_uid(l, uid);
- goto finish;
- }
- }
-
- r = -EIO;
-
-finish:
- fclose(f);
-
- return r;
-}
-
-char *strnappend(const char *s, const char *suffix, size_t b) {
- size_t a;
- char *r;
-
- if (!s && !suffix)
- return strdup("");
-
- if (!s)
- return strndup(suffix, b);
-
- if (!suffix)
- return strdup(s);
-
- assert(s);
- assert(suffix);
-
- a = strlen(s);
-
- if (!(r = new(char, a+b+1)))
- return NULL;
-
- memcpy(r, s, a);
- memcpy(r+a, suffix, b);
- r[a+b] = 0;
-
- return r;
-}
-
-char *strappend(const char *s, const char *suffix) {
- return strnappend(s, suffix, suffix ? strlen(suffix) : 0);
-}
-
-int readlink_malloc(const char *p, char **r) {
- size_t l = 100;
-
- assert(p);
- assert(r);
-
- 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;
-
- assert(p);
- assert(r);
-
- j = readlink_and_make_absolute(p, &t);
- if (j < 0)
- return j;
-
- s = canonicalize_file_name(t);
- if (s) {
- free(t);
- *r = s;
- } else
- *r = t;
-
- path_kill_slashes(*r);
-
- return 0;
-}
-
-int parent_of_path(const char *path, char **_r) {
- const char *e, *a = NULL, *b = NULL, *p;
- char *r;
- bool slash = false;
-
- assert(path);
- assert(_r);
-
- if (!*path)
- return -EINVAL;
-
- for (e = path; *e; e++) {
-
- if (!slash && *e == '/') {
- a = b;
- b = e;
- slash = true;
- } else if (slash && *e != '/')
- slash = false;
- }
-
- if (*(e-1) == '/')
- p = a;
- else
- p = b;
-
- if (!p)
- return -EINVAL;
-
- if (p == path)
- r = strdup("/");
- else
- r = strndup(path, p-path);
-
- if (!r)
- return -ENOMEM;
-
- *_r = r;
- return 0;
-}
-
-
-char *file_name_from_path(const char *p) {
- char *r;
-
- assert(p);
-
- if ((r = strrchr(p, '/')))
- return r + 1;
-
- return (char*) p;
-}
-
-bool path_is_absolute(const char *p) {
- assert(p);
-
- return p[0] == '/';
-}
-
-bool is_path(const char *p) {
-
- return !!strchr(p, '/');
-}
-
-char *path_make_absolute(const char *p, const char *prefix) {
- assert(p);
-
- /* Makes every item in the list an absolute path by prepending
- * the prefix, if specified and necessary */
-
- if (path_is_absolute(p) || !prefix)
- return strdup(p);
-
- return join(prefix, "/", p, NULL);
-}
-
-char *path_make_absolute_cwd(const char *p) {
- char *cwd, *r;
-
- assert(p);
-
- /* 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;
-}
-
-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. */
-
- STRV_FOREACH(s, l) {
- char *t;
-
- if (!(t = path_make_absolute_cwd(*s)))
- return NULL;
-
- free(*s);
- *s = t;
- }
-
- return l;
-}
-
-char **strv_path_canonicalize(char **l) {
- char **s;
- unsigned k = 0;
- bool enomem = false;
-
- if (strv_isempty(l))
- return l;
-
- /* Goes through every item in the string list and canonicalize
- * the path. This works in place and won't rollback any
- * changes on failure. */
-
- STRV_FOREACH(s, l) {
- char *t, *u;
-
- t = path_make_absolute_cwd(*s);
- free(*s);
-
- if (!t) {
- enomem = true;
- continue;
- }
-
- errno = 0;
- u = canonicalize_file_name(t);
- free(t);
-
- if (!u) {
- if (errno == ENOMEM || !errno)
- enomem = true;
-
- continue;
- }
-
- l[k++] = u;
- }
-
- l[k] = NULL;
-
- if (enomem)
- return NULL;
-
- return l;
-}
-
-char **strv_path_remove_empty(char **l) {
- char **f, **t;
-
- 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;
-
- *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;
-}
-
-bool in_charset(const char *s, const char* charset) {
- const char *i;
-
- assert(s);
- assert(charset);
-
- for (i = s; *i; i++)
- if (!strchr(charset, *i))
- return false;
-
- return true;
-}
-
-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;
-
- 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 */
-
- r = new(char, length+1);
- if (!r)
- 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;
-
- a = unhexchar(f[1]);
- b = unhexchar(f[2]);
-
- if (a < 0 || b < 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;
-
- a = unoctchar(f[0]);
- b = unoctchar(f[1]);
- c = unoctchar(f[2]);
-
- if (a < 0 || b < 0 || c < 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;
-}
-
-static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) {
- unsigned i;
-
- assert(n_fdset == 0 || fdset);
-
- for (i = 0; i < n_fdset; i++)
- if (fdset[i] == fd)
- return true;
-
- return false;
-}
-
-int close_all_fds(const int except[], unsigned n_except) {
- DIR *d;
- struct dirent *de;
- int r = 0;
-
- assert(n_except == 0 || except);
-
- d = opendir("/proc/self/fd");
- if (!d) {
- int fd;
- struct rlimit rl;
-
- /* When /proc isn't available (for example in chroots)
- * the fallback is brute forcing through the fd
- * table */
-
- assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0);
- for (fd = 3; fd < (int) rl.rlim_max; fd ++) {
-
- if (fd_in_set(fd, except, n_except))
- continue;
-
- if (close_nointr(fd) < 0)
- if (errno != EBADF && r == 0)
- r = -errno;
- }
-
- return r;
- }
-
- 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 (fd_in_set(fd, except, n_except))
- 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) {
- r = -errno;
- goto fail;
- }
-
- vt = tiocl[0] <= 0 ? 1 : tiocl[0];
- }
-
- if (ioctl(fd, VT_ACTIVATE, vt) < 0)
- r = -errno;
-
-fail:
- close_nointr_nofail(fd);
- return r;
-}
-
-int read_one_char(FILE *f, char *ret, usec_t t, 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;
-
- if (t != (usec_t) -1) {
- if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) {
- tcsetattr(fileno(f), TCSADRAIN, &old_termios);
- return -ETIMEDOUT;
- }
- }
-
- 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 (t != (usec_t) -1)
- if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0)
- return -ETIMEDOUT;
-
- 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(ANSI_HIGHLIGHT_ON, stdout);
-
- va_start(ap, text);
- vprintf(text, ap);
- va_end(ap);
-
- if (on_tty)
- fputs(ANSI_HIGHLIGHT_OFF, stdout);
-
- fflush(stdout);
-
- r = read_one_char(stdin, &c, (usec_t) -1, &need_nl);
- if (r < 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, bool switch_to_text) {
- struct termios termios;
- int r = 0;
-
- /* 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);
-
- /* Switch to text mode */
- if (switch_to_text)
- ioctl(fd, KDSETMODE, KD_TEXT);
-
- /* Enable console unicode mode */
- ioctl(fd, KDSKBMODE, K_UNICODE);
-
- 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, true);
- 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);
-
- r = reset_terminal_fd(fd, true);
- if (r < 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;
-
- k = write(fd, p, nbytes);
- if (k <= 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, bool allow_symlink) {
- struct stat a, b;
- char *parent;
- int r;
-
- if (allow_symlink)
- r = stat(t, &a);
- else
- r = lstat(t, &a);
-
- if (r < 0) {
- if (errno == ENOENT)
- return 0;
-
- return -errno;
- }
-
- r = parent_of_path(t, &parent);
- if (r < 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 parse_bytes(const char *t, off_t *bytes) {
- static const struct {
- const char *suffix;
- off_t factor;
- } table[] = {
- { "B", 1 },
- { "K", 1024ULL },
- { "M", 1024ULL*1024ULL },
- { "G", 1024ULL*1024ULL*1024ULL },
- { "T", 1024ULL*1024ULL*1024ULL*1024ULL },
- { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL },
- { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL },
- { "", 1 },
- };
-
- const char *p;
- off_t r = 0;
-
- assert(t);
- assert(bytes);
-
- 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 += (off_t) l * table[i].factor;
- p = e + strlen(table[i].suffix);
- break;
- }
-
- if (i >= ELEMENTSOF(table))
- return -EINVAL;
-
- } while (*p != 0);
-
- *bytes = 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;
- }
-
- if (!de) {
- r = 1;
- break;
- }
-
- if (!ignore_file(de->d_name)) {
- r = 0;
- break;
- }
- }
-
- 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);
-
- /* This is a like a poor man's setproctitle(). It changes the
- * comm field, argv[0], and also the glibc's internally used
- * name of the process. For the first one a limit of 16 chars
- * applies, to the second one usually one of 10 (i.e. length
- * of "/sbin/init"), to the third one one of 7 (i.e. length of
- * "systemd"). If you pass a longer string it will be
- * truncated */
-
- prctl(PR_SET_NAME, name);
-
- 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 = feof(f) ? -EIO : -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, bool honour_sticky) {
- 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, keep_around = false;
- int r;
-
- if ((r = readdir_r(d, &buf, &de)) != 0) {
- if (ret == 0)
- ret = -r;
- break;
- }
-
- if (!de)
- break;
-
- 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;
- }
-
- if (honour_sticky)
- keep_around =
- (st.st_uid == 0 || st.st_uid == getuid()) &&
- (st.st_mode & S_ISVTX);
-
- is_dir = S_ISDIR(st.st_mode);
-
- } else {
- if (honour_sticky) {
- struct stat st;
-
- if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
- if (ret == 0 && errno != ENOENT)
- ret = -errno;
- continue;
- }
-
- keep_around =
- (st.st_uid == 0 || st.st_uid == getuid()) &&
- (st.st_mode & S_ISVTX);
- }
-
- is_dir = de->d_type == DT_DIR;
- }
-
- if (is_dir) {
- int subdir_fd;
-
- subdir_fd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
- if (subdir_fd < 0) {
- if (ret == 0 && errno != ENOENT)
- ret = -errno;
- continue;
- }
-
- if ((r = rm_rf_children(subdir_fd, only_dirs, honour_sticky)) < 0) {
- if (ret == 0)
- ret = r;
- }
-
- if (!keep_around)
- if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) {
- if (ret == 0 && errno != ENOENT)
- ret = -errno;
- }
-
- } else if (!only_dirs && !keep_around) {
-
- 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, bool honour_sticky) {
- 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, honour_sticky);
-
- if (delete_root) {
-
- if (honour_sticky && file_is_priv_sticky(path) > 0)
- return r;
-
- if (rmdir(path) < 0 && errno != ENOENT) {
- 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 (mode != (mode_t) -1)
- if (chmod(path, mode) < 0)
- return -errno;
-
- if (uid != (uid_t) -1 || gid != (gid_t) -1)
- if (chown(path, uid, gid) < 0)
- return -errno;
-
- return 0;
-}
-
-int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) {
- assert(fd >= 0);
-
- /* 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 (fchmod(fd, mode) < 0)
- return -errno;
-
- if (fchown(fd, 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 *status, bool ellipse, const char *format, va_list ap) {
- char *s = NULL, *spaces = NULL, *e;
- int fd = -1, c;
- size_t emax, sl, left;
- struct iovec iovec[5];
- int n = 0;
-
- 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;
-
- fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
- if (fd < 0)
- goto finish;
-
- if (ellipse) {
- c = fd_columns(fd);
- if (c <= 0)
- c = 80;
-
- if (status) {
- sl = 2 + 6 + 1; /* " [" status "]" */
- emax = (size_t) c > sl ? c - sl - 1 : 0;
- } else
- emax = c - 1;
-
- e = ellipsize(s, emax, 75);
- if (e) {
- free(s);
- s = e;
- }
- }
-
- zero(iovec);
- IOVEC_SET_STRING(iovec[n++], s);
-
- if (ellipse) {
- sl = strlen(s);
- left = emax > sl ? emax - sl : 0;
- if (left > 0) {
- spaces = malloc(left);
- if (spaces) {
- memset(spaces, ' ', left);
- iovec[n].iov_base = spaces;
- iovec[n].iov_len = left;
- n++;
- }
- }
- }
-
- if (status) {
- IOVEC_SET_STRING(iovec[n++], " [");
- IOVEC_SET_STRING(iovec[n++], status);
- IOVEC_SET_STRING(iovec[n++], "]\n");
- } else
- IOVEC_SET_STRING(iovec[n++], "\n");
-
- writev(fd, iovec, n);
-
-finish:
- free(s);
- free(spaces);
-
- if (fd >= 0)
- close_nointr_nofail(fd);
-}
-
-void status_printf(const char *status, bool ellipse, const char *format, ...) {
- va_list ap;
-
- assert(format);
-
- va_start(ap, format);
- status_vprintf(status, ellipse, 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 (!pretty_name && !const_pretty)
- const_pretty = "Linux";
-
- if (!ansi_color && !const_color)
- const_color = "1";
-
- status_printf(NULL,
- false,
- "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
- const_color ? const_color : ansi_color,
- const_pretty ? const_pretty : pretty_name);
-
- free(ansi_color);
- free(pretty_name);
-}
-
-char *replace_env(const char *format, char **env) {
- enum {
- WORD,
- CURLY,
- VARIABLE
- } state = WORD;
-
- const char *e, *word = format;
- char *r = NULL, *k;
-
- assert(format);
-
- for (e = format; *e; e ++) {
-
- switch (state) {
-
- case WORD:
- if (*e == '$')
- state = CURLY;
- break;
-
- case CURLY:
- if (*e == '{') {
- if (!(k = strnappend(r, word, e-word-1)))
- goto fail;
-
- free(r);
- r = k;
-
- word = e-1;
- state = VARIABLE;
-
- } else if (*e == '$') {
- if (!(k = strnappend(r, word, e-word)))
- goto fail;
-
- free(r);
- r = k;
-
- word = e+1;
- state = WORD;
- } else
- state = WORD;
- break;
-
- case VARIABLE:
- if (*e == '}') {
- const char *t;
-
- 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;
- }
- }
-
- if (!(k = strnappend(r, word, e-word)))
- goto fail;
-
- 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;
- }
-
- r = w;
- if (m) {
- memcpy(r + k, m, q * sizeof(char*));
- free(m);
- }
-
- k += q;
- continue;
- }
-
- /* 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;
- }
- }
-
- r[k] = NULL;
- return r;
-}
-
-int fd_columns(int fd) {
- struct winsize ws;
- zero(ws);
-
- if (ioctl(fd, TIOCGWINSZ, &ws) < 0)
- return -errno;
-
- if (ws.ws_col <= 0)
- return -EIO;
-
- return ws.ws_col;
-}
-
-unsigned columns(void) {
- static __thread int parsed_columns = 0;
- const char *e;
-
- if (_likely_(parsed_columns > 0))
- return parsed_columns;
-
- e = getenv("COLUMNS");
- if (e)
- parsed_columns = atoi(e);
-
- if (parsed_columns <= 0)
- parsed_columns = fd_columns(STDOUT_FILENO);
-
- if (parsed_columns <= 0)
- parsed_columns = 80;
-
- return parsed_columns;
-}
-
-int fd_lines(int fd) {
- struct winsize ws;
- zero(ws);
-
- if (ioctl(fd, TIOCGWINSZ, &ws) < 0)
- return -errno;
-
- if (ws.ws_row <= 0)
- return -EIO;
-
- return ws.ws_row;
-}
-
-unsigned lines(void) {
- static __thread int parsed_lines = 0;
- const char *e;
-
- if (_likely_(parsed_lines > 0))
- return parsed_lines;
-
- e = getenv("LINES");
- if (e)
- parsed_lines = atoi(e);
-
- if (parsed_lines <= 0)
- parsed_lines = fd_lines(STDOUT_FILENO);
-
- if (parsed_lines <= 0)
- parsed_lines = 25;
-
- return parsed_lines;
-}
-
-int running_in_chroot(void) {
- struct stat a, b;
-
- zero(a);
- zero(b);
-
- /* Only works as root */
-
- if (stat("/proc/1/root", &a) < 0)
- return -errno;
-
- if (stat("/", &b) < 0)
- return -errno;
-
- return
- a.st_dev != b.st_dev ||
- a.st_ino != b.st_ino;
-}
-
-char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) {
- size_t x;
- char *r;
-
- assert(s);
- assert(percent <= 100);
- assert(new_length >= 3);
-
- if (old_length <= 3 || old_length <= new_length)
- return strndup(s, old_length);
-
- r = new0(char, new_length+1);
- if (!r)
- return r;
-
- x = (new_length * percent) / 100;
-
- if (x > new_length - 3)
- x = new_length - 3;
-
- memcpy(r, s, x);
- r[x] = '.';
- r[x+1] = '.';
- r[x+2] = '.';
- memcpy(r + x + 3,
- s + old_length - (new_length - x - 3),
- new_length - x - 3);
-
- return r;
-}
-
-char *ellipsize(const char *s, size_t length, unsigned percent) {
- return ellipsize_mem(s, strlen(s), length, percent);
-}
-
-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);
-
- l = strlen(s);
- if (l < 2)
- return strdup(s);
-
- 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;
-
- if (!(p = strdup(p+1))) {
- free(name);
- return NULL;
- }
-
- value = unquote(strstrip(p), QUOTES);
- free(p);
-
- if (!value) {
- free(name);
- return NULL;
- }
-
- if (asprintf(&r, "%s=%s", name, value) < 0)
- r = NULL;
-
- free(value);
- free(name);
-
- return r;
-}
-
-int wait_for_terminate(pid_t pid, siginfo_t *status) {
- siginfo_t dummy;
-
- assert(pid >= 1);
-
- if (!status)
- status = &dummy;
-
- for (;;) {
- zero(*status);
-
- if (waitid(P_PID, pid, status, WEXITED) < 0) {
-
- if (errno == EINTR)
- continue;
-
- return -errno;
- }
-
- return 0;
- }
-}
-
-int wait_for_terminate_and_warn(const char *name, pid_t pid) {
- int r;
- siginfo_t status;
-
- assert(name);
- assert(pid > 1);
-
- if ((r = wait_for_terminate(pid, &status)) < 0) {
- log_warning("Failed to wait for %s: %s", name, strerror(-r));
- return r;
- }
-
- 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;
- }
-
- log_debug("%s succeeded.", name);
- return 0;
-
- } 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;
- }
-
- log_warning("%s failed due to unknown reason.", name);
- return -EPROTO;
-
-}
-
-_noreturn_ void freeze(void) {
-
- /* Make sure nobody waits for us on a socket anymore */
- close_all_fds(NULL, 0);
-
- sync();
-
- for (;;)
- pause();
-}
-
-bool null_or_empty(struct stat *st) {
- assert(st);
-
- if (S_ISREG(st->st_mode) && st->st_size <= 0)
- return true;
-
- if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode))
- return true;
-
- return false;
-}
-
-int null_or_empty_path(const char *fn) {
- struct stat st;
-
- assert(fn);
-
- if (stat(fn, &st) < 0)
- return -errno;
-
- return null_or_empty(&st);
-}
-
-DIR *xopendirat(int fd, const char *name, int flags) {
- int nfd;
- DIR *d;
-
- 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;
-}
-
-int signal_from_string_try_harder(const char *s) {
- int signo;
- assert(s);
-
- if ((signo = signal_from_string(s)) <= 0)
- if (startswith(s, "SIG"))
- return signal_from_string(s+3);
-
- return signo;
-}
-
-void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t) {
-
- assert(f);
- assert(name);
- assert(t);
-
- if (!dual_timestamp_is_set(t))
- return;
-
- fprintf(f, "%s=%llu %llu\n",
- name,
- (unsigned long long) t->realtime,
- (unsigned long long) t->monotonic);
-}
-
-void dual_timestamp_deserialize(const char *value, dual_timestamp *t) {
- unsigned long long a, b;
-
- assert(value);
- assert(t);
-
- 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 *fstab_node_to_udev_node(const char *p) {
- char *dn, *t, *u;
- int r;
-
- /* FIXME: to follow udev's logic 100% we need to leave valid
- * UTF8 chars unescaped */
-
- if (startswith(p, "LABEL=")) {
-
- if (!(u = unquote(p+6, "\"\'")))
- return NULL;
-
- t = xescape(u, "/ ");
- free(u);
-
- if (!t)
- return NULL;
-
- r = asprintf(&dn, "/dev/disk/by-label/%s", t);
- free(t);
-
- if (r < 0)
- return NULL;
-
- return dn;
- }
-
- if (startswith(p, "UUID=")) {
-
- if (!(u = unquote(p+5, "\"\'")))
- return NULL;
-
- 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);
-}
-
-void filter_environ(const char *prefix) {
- int i, j;
- assert(prefix);
-
- if (!environ)
- return;
-
- for (i = 0, j = 0; environ[i]; i++) {
-
- if (startswith(environ[i], prefix))
- continue;
-
- environ[j++] = environ[i];
- }
-
- environ[j] = NULL;
-}
-
-bool tty_is_vc(const char *tty) {
- assert(tty);
-
- if (startswith(tty, "/dev/"))
- tty += 5;
-
- return vtnr_from_tty(tty) >= 0;
-}
-
-int vtnr_from_tty(const char *tty) {
- int i, r;
-
- assert(tty);
-
- if (startswith(tty, "/dev/"))
- tty += 5;
-
- if (!startswith(tty, "tty") )
- return -EINVAL;
-
- if (tty[3] < '0' || tty[3] > '9')
- return -EINVAL;
-
- r = safe_atoi(tty+3, &i);
- if (r < 0)
- return r;
-
- if (i < 0 || i > 63)
- return -EINVAL;
-
- return i;
-}
-
-bool tty_is_vc_resolve(const char *tty) {
- char *active = NULL;
- bool b;
-
- assert(tty);
-
- if (startswith(tty, "/dev/"))
- tty += 5;
-
- /* Resolve where /dev/console is pointing to */
- 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 */
- tty = strrchr(active, ' ');
- if (tty)
- tty++;
- else
- tty = active;
- }
-
- b = tty_is_vc(tty);
- free(active);
-
- return b;
-}
-
-const char *default_term_for_tty(const char *tty) {
- assert(tty);
-
- return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt100";
-}
-
-bool dirent_is_file(const struct dirent *de) {
- assert(de);
-
- if (ignore_file(de->d_name))
- return false;
-
- if (de->d_type != DT_REG &&
- de->d_type != DT_LNK &&
- de->d_type != DT_UNKNOWN)
- return false;
-
- return true;
-}
-
-bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) {
- assert(de);
-
- if (!dirent_is_file(de))
- return false;
-
- return endswith(de->d_name, suffix);
-}
-
-void execute_directory(const char *directory, DIR *d, char *argv[]) {
- DIR *_d = NULL;
- struct dirent *de;
- Hashmap *pids = NULL;
-
- assert(directory);
-
- /* Executes all binaries in a directory in parallel and waits
- * until all they all finished. */
-
- if (!d) {
- if (!(_d = opendir(directory))) {
-
- if (errno == ENOENT)
- return;
-
- log_error("Failed to enumerate directory %s: %m", directory);
- return;
- }
-
- d = _d;
- }
-
- if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) {
- log_error("Failed to allocate set.");
- goto finish;
- }
-
- while ((de = readdir(d))) {
- char *path;
- pid_t pid;
- int k;
-
- if (!dirent_is_file(de))
- continue;
-
- if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) {
- log_error("Out of memory");
- continue;
- }
-
- if ((pid = fork()) < 0) {
- log_error("Failed to fork: %m");
- free(path);
- continue;
- }
-
- if (pid == 0) {
- char *_argv[2];
- /* Child */
-
- if (!argv) {
- _argv[0] = path;
- _argv[1] = NULL;
- argv = _argv;
- } else
- if (!argv[0])
- argv[0] = path;
-
- execv(path, argv);
-
- log_error("Failed to execute %s: %m", path);
- _exit(EXIT_FAILURE);
- }
-
- log_debug("Spawned %s as %lu", path, (unsigned long) pid);
-
- if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) {
- log_error("Failed to add PID to set: %s", strerror(-k));
- free(path);
- }
- }
-
- while (!hashmap_isempty(pids)) {
- pid_t pid = PTR_TO_UINT(hashmap_first_key(pids));
- siginfo_t si;
- char *path;
-
- zero(si);
- if (waitid(P_PID, pid, &si, WEXITED) < 0) {
-
- if (errno == EINTR)
- continue;
-
- log_error("waitid() failed: %m");
- goto finish;
- }
-
- 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);
-
- free(path);
- }
- }
-
-finish:
- if (_d)
- closedir(_d);
-
- if (pids)
- hashmap_free_free(pids);
-}
-
-int kill_and_sigcont(pid_t pid, int sig) {
- int r;
-
- r = kill(pid, sig) < 0 ? -errno : 0;
-
- if (r >= 0)
- kill(pid, SIGCONT);
-
- return r;
-}
-
-bool nulstr_contains(const char*nulstr, const char *needle) {
- const char *i;
-
- if (!nulstr)
- return false;
-
- NULSTR_FOREACH(i, nulstr)
- if (streq(i, needle))
- return true;
-
- return false;
-}
-
-bool plymouth_running(void) {
- return access("/run/plymouth/pid", F_OK) >= 0;
-}
-
-void parse_syslog_priority(char **p, int *priority) {
- int a = 0, b = 0, c = 0;
- int k;
-
- assert(p);
- assert(*p);
- assert(priority);
-
- 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;
-}
-
-void skip_syslog_pid(char **buf) {
- char *p;
-
- assert(buf);
- assert(*buf);
-
- p = *buf;
-
- if (*p != '[')
- return;
-
- p++;
- p += strspn(p, "0123456789");
-
- if (*p != ']')
- return;
-
- p++;
-
- *buf = p;
-}
-
-void skip_syslog_date(char **buf) {
- enum {
- LETTER,
- SPACE,
- NUMBER,
- SPACE_OR_NUMBER,
- COLON
- } sequence[] = {
- LETTER, LETTER, LETTER,
- SPACE,
- SPACE_OR_NUMBER, NUMBER,
- SPACE,
- SPACE_OR_NUMBER, NUMBER,
- COLON,
- SPACE_OR_NUMBER, NUMBER,
- COLON,
- SPACE_OR_NUMBER, NUMBER,
- SPACE
- };
-
- char *p;
- unsigned i;
-
- assert(buf);
- assert(*buf);
-
- p = *buf;
-
- for (i = 0; i < ELEMENTSOF(sequence); i++, p++) {
-
- if (!*p)
- return;
-
- switch (sequence[i]) {
-
- case SPACE:
- if (*p != ' ')
- return;
- break;
-
- case SPACE_OR_NUMBER:
- if (*p == ' ')
- break;
-
- /* fall through */
-
- case NUMBER:
- if (*p < '0' || *p > '9')
- return;
-
- break;
-
- case LETTER:
- if (!(*p >= 'A' && *p <= 'Z') &&
- !(*p >= 'a' && *p <= 'z'))
- return;
-
- break;
-
- case COLON:
- if (*p != ':')
- return;
- break;
-
- }
- }
-
- *buf = p;
-}
-
-int have_effective_cap(int value) {
- cap_t cap;
- cap_flag_value_t fv;
- int r;
-
- if (!(cap = cap_get_proc()))
- return -errno;
-
- if (cap_get_flag(cap, value, CAP_EFFECTIVE, &fv) < 0)
- r = -errno;
- else
- r = fv == CAP_SET;
-
- cap_free(cap);
- return r;
-}
-
-char* strshorten(char *s, size_t l) {
- assert(s);
-
- if (l < strlen(s))
- s[l] = 0;
-
- return s;
-}
-
-static bool hostname_valid_char(char c) {
- return
- (c >= 'a' && c <= 'z') ||
- (c >= 'A' && c <= 'Z') ||
- (c >= '0' && c <= '9') ||
- c == '-' ||
- c == '_' ||
- c == '.';
-}
-
-bool hostname_is_valid(const char *s) {
- const char *p;
-
- if (isempty(s))
- return false;
-
- for (p = s; *p; p++)
- if (!hostname_valid_char(*p))
- return false;
-
- if (p-s > HOST_NAME_MAX)
- return false;
-
- return true;
-}
-
-char* hostname_cleanup(char *s) {
- char *p, *d;
-
- 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;
-
- *d = 0;
-
- strshorten(s, HOST_NAME_MAX);
- return s;
-}
-
-int pipe_eof(int fd) {
- struct pollfd pollfd;
- int r;
-
- zero(pollfd);
- pollfd.fd = fd;
- pollfd.events = POLLIN|POLLHUP;
-
- r = poll(&pollfd, 1, 0);
- if (r < 0)
- return -errno;
-
- if (r == 0)
- return 0;
-
- return pollfd.revents & POLLHUP;
-}
-
-int fd_wait_for_event(int fd, int event, usec_t t) {
- struct pollfd pollfd;
- int r;
-
- zero(pollfd);
- pollfd.fd = fd;
- pollfd.events = event;
-
- r = poll(&pollfd, 1, t == (usec_t) -1 ? -1 : (int) (t / USEC_PER_MSEC));
- if (r < 0)
- return -errno;
-
- if (r == 0)
- return 0;
-
- return pollfd.revents;
-}
-
-int fopen_temporary(const char *path, FILE **_f, char **_temp_path) {
- FILE *f;
- char *t;
- const char *fn;
- size_t k;
- int fd;
-
- assert(path);
- assert(_f);
- assert(_temp_path);
-
- t = new(char, strlen(path) + 1 + 6 + 1);
- if (!t)
- return -ENOMEM;
-
- fn = file_name_from_path(path);
- k = fn-path;
- memcpy(t, path, k);
- t[k] = '.';
- stpcpy(stpcpy(t+k+1, fn), "XXXXXX");
-
- fd = mkostemp(t, O_WRONLY|O_CLOEXEC);
- if (fd < 0) {
- free(t);
- return -errno;
- }
-
- f = fdopen(fd, "we");
- if (!f) {
- unlink(t);
- free(t);
- return -errno;
- }
-
- *_f = f;
- *_temp_path = t;
-
- return 0;
-}
-
-int terminal_vhangup_fd(int fd) {
- assert(fd >= 0);
-
- if (ioctl(fd, TIOCVHANGUP) < 0)
- return -errno;
-
- return 0;
-}
-
-int terminal_vhangup(const char *name) {
- int fd, r;
-
- fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
- if (fd < 0)
- return fd;
-
- r = terminal_vhangup_fd(fd);
- close_nointr_nofail(fd);
-
- return r;
-}
-
-int vt_disallocate(const char *name) {
- int fd, r;
- unsigned u;
-
- /* 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 (!startswith(name, "/dev/"))
- return -EINVAL;
-
- 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 */
-
- 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);
-
- return 0;
- }
-
- if (!startswith(name, "/dev/tty"))
- return -EINVAL;
-
- r = safe_atou(name+8, &u);
- if (r < 0)
- return r;
-
- if (u <= 0)
- return -EINVAL;
-
- /* Try to deallocate */
- fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC);
- if (fd < 0)
- return fd;
-
- r = ioctl(fd, VT_DISALLOCATE, u);
- close_nointr_nofail(fd);
-
- if (r >= 0)
- return 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 0;
-}
-
-static int files_add(Hashmap *h, const char *path, const char *suffix) {
- DIR *dir;
- struct dirent buffer, *de;
- int r = 0;
-
- dir = opendir(path);
- if (!dir) {
- if (errno == ENOENT)
- return 0;
- return -errno;
- }
-
- for (;;) {
- int k;
- char *p, *f;
-
- k = readdir_r(dir, &buffer, &de);
- if (k != 0) {
- r = -k;
- goto finish;
- }
-
- if (!de)
- break;
-
- if (!dirent_is_file_with_suffix(de, suffix))
- continue;
-
- if (asprintf(&p, "%s/%s", path, de->d_name) < 0) {
- r = -ENOMEM;
- goto finish;
- }
-
- f = canonicalize_file_name(p);
- if (!f) {
- log_error("Failed to canonicalize file name '%s': %m", p);
- free(p);
- continue;
- }
- free(p);
-
- log_debug("found: %s\n", f);
- if (hashmap_put(h, file_name_from_path(f), f) <= 0)
- free(f);
- }
-
-finish:
- closedir(dir);
- return r;
-}
-
-static int base_cmp(const void *a, const void *b) {
- const char *s1, *s2;
-
- s1 = *(char * const *)a;
- s2 = *(char * const *)b;
- return strcmp(file_name_from_path(s1), file_name_from_path(s2));
-}
-
-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;
-
- 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;
- }
-
- fh = hashmap_new(string_hash_func, string_compare_func);
- if (!fh) {
- r = -ENOMEM;
- goto finish;
- }
-
- 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;
- }
-
- qsort(files, hashmap_size(fh), sizeof(char *), base_cmp);
-
-finish:
- strv_free(dirs);
- hashmap_free(fh);
- *strv = files;
- return r;
-}
-
-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;
-
- b = fgets(line, sizeof(line), f) &&
- fgets(line, sizeof(line), f) &&
- fgets(line, sizeof(line), f);
-
- fclose(f);
-
- if (!b)
- return -EIO;
-
-
- truncate_nl(line);
- local = streq(line, "LOCAL");
-
- } else if (errno != -ENOENT)
- return -errno;
-
- return local;
-}
-
-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_se(clock_gettime(CLOCK_REALTIME, &ts) == 0);
- assert_se(tm = localtime(&ts.tv_sec));
- minuteswest = tm->tm_gmtoff / 60;
-
- tz.tz_minuteswest = -minuteswest;
- tz.tz_dsttime = 0; /* DST_NONE*/
-
- /*
- * 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;
-}
-
-int hwclock_reset_localtime_delta(void) {
- const struct timeval *tv_null = NULL;
- struct timezone tz;
-
- tz.tz_minuteswest = 0;
- tz.tz_dsttime = 0; /* DST_NONE*/
-
- if (settimeofday(tv_null, &tz) < 0)
- return -errno;
-
- return 0;
-}
-
-int rtc_open(int flags) {
- int fd;
- DIR *d;
-
- /* First, we try to make use of the /dev/rtc symlink. If that
- * doesn't exist, we open the first RTC which has hctosys=1
- * set. If we don't find any we just take the first RTC that
- * exists at all. */
-
- fd = open("/dev/rtc", flags);
- if (fd >= 0)
- return fd;
-
- d = opendir("/sys/class/rtc");
- if (!d)
- goto fallback;
-
- for (;;) {
- char *p, *v;
- struct dirent buf, *de;
- int r;
-
- r = readdir_r(d, &buf, &de);
- if (r != 0)
- goto fallback;
-
- if (!de)
- goto fallback;
-
- if (ignore_file(de->d_name))
- continue;
-
- p = join("/sys/class/rtc/", de->d_name, "/hctosys", NULL);
- if (!p) {
- closedir(d);
- return -ENOMEM;
- }
-
- r = read_one_line_file(p, &v);
- free(p);
-
- if (r < 0)
- continue;
-
- r = parse_boolean(v);
- free(v);
-
- if (r <= 0)
- continue;
-
- p = strappend("/dev/", de->d_name);
- fd = open(p, flags);
- free(p);
-
- if (fd >= 0) {
- closedir(d);
- return fd;
- }
- }
-
-fallback:
- if (d)
- closedir(d);
-
- fd = open("/dev/rtc0", flags);
- if (fd < 0)
- return -errno;
-
- return fd;
-}
-
-int hwclock_get_time(struct tm *tm) {
- int fd;
- int err = 0;
-
- assert(tm);
-
- fd = rtc_open(O_RDONLY|O_CLOEXEC);
- if (fd < 0)
- return -errno;
-
- /* This leaves the timezone fields of struct tm
- * uninitialized! */
- if (ioctl(fd, RTC_RD_TIME, tm) < 0)
- err = -errno;
-
- /* We don't now daylight saving, so we reset this in order not
- * to confused mktime(). */
- tm->tm_isdst = -1;
-
- close_nointr_nofail(fd);
-
- return err;
-}
-
-int hwclock_set_time(const struct tm *tm) {
- int fd;
- int err = 0;
-
- assert(tm);
-
- fd = rtc_open(O_RDONLY|O_CLOEXEC);
- if (fd < 0)
- return -errno;
-
- if (ioctl(fd, RTC_SET_TIME, tm) < 0)
- err = -errno;
-
- close_nointr_nofail(fd);
-
- return err;
-}
-
-int copy_file(const char *from, const char *to) {
- int r, fdf, fdt;
-
- assert(from);
- assert(to);
-
- fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY);
- if (fdf < 0)
- return -errno;
-
- fdt = open(to, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY, 0644);
- if (fdt < 0) {
- close_nointr_nofail(fdf);
- return -errno;
- }
-
- for (;;) {
- char buf[PIPE_BUF];
- ssize_t n, k;
-
- n = read(fdf, buf, sizeof(buf));
- if (n < 0) {
- r = -errno;
-
- close_nointr_nofail(fdf);
- close_nointr(fdt);
- unlink(to);
-
- return r;
- }
-
- if (n == 0)
- break;
-
- errno = 0;
- k = loop_write(fdt, buf, n, false);
- if (n != k) {
- r = k < 0 ? k : (errno ? -errno : -EIO);
-
- close_nointr_nofail(fdf);
- close_nointr(fdt);
-
- unlink(to);
- return r;
- }
- }
-
- close_nointr_nofail(fdf);
- r = close_nointr(fdt);
-
- if (r < 0) {
- unlink(to);
- return r;
- }
-
- return 0;
-}
-
-int symlink_or_copy(const char *from, const char *to) {
- char *pf = NULL, *pt = NULL;
- struct stat a, b;
- int r;
-
- assert(from);
- assert(to);
-
- if (parent_of_path(from, &pf) < 0 ||
- parent_of_path(to, &pt) < 0) {
- r = -ENOMEM;
- goto finish;
- }
-
- if (stat(pf, &a) < 0 ||
- stat(pt, &b) < 0) {
- r = -errno;
- goto finish;
- }
-
- if (a.st_dev != b.st_dev) {
- free(pf);
- free(pt);
-
- return copy_file(from, to);
- }
-
- if (symlink(from, to) < 0) {
- r = -errno;
- goto finish;
- }
-
- r = 0;
-
-finish:
- free(pf);
- free(pt);
-
- return r;
-}
-
-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;
-
- assert(from);
- assert(to);
-
- t = new(char, strlen(to) + 1 + 16 + 1);
- if (!t)
- return -ENOMEM;
-
- fn = file_name_from_path(to);
- k = fn-to;
- memcpy(t, to, k);
- t[k] = '.';
- x = stpcpy(t+k+1, fn);
-
- ull = random_ull();
- for (i = 0; i < 16; i++) {
- *(x++) = hexchar(ull & 0xF);
- ull >>= 4;
- }
-
- *x = 0;
-
- r = symlink_or_copy(from, t);
- if (r < 0) {
- unlink(t);
- free(t);
- return r;
- }
-
- if (rename(t, to) < 0) {
- r = -errno;
- unlink(t);
- free(t);
- return r;
- }
-
- free(t);
- return r;
-}
-
-int audit_session_from_pid(pid_t pid, uint32_t *id) {
- char *s;
- uint32_t u;
- int r;
-
- assert(id);
-
- if (have_effective_cap(CAP_AUDIT_CONTROL) <= 0)
- return -ENOENT;
-
- if (pid == 0)
- r = read_one_line_file("/proc/self/sessionid", &s);
- else {
- char *p;
-
- if (asprintf(&p, "/proc/%lu/sessionid", (unsigned long) pid) < 0)
- return -ENOMEM;
-
- r = read_one_line_file(p, &s);
- free(p);
- }
-
- if (r < 0)
- return r;
-
- r = safe_atou32(s, &u);
- free(s);
-
- if (r < 0)
- return r;
-
- if (u == (uint32_t) -1 || u <= 0)
- return -ENOENT;
-
- *id = u;
- return 0;
-}
-
-int audit_loginuid_from_pid(pid_t pid, uid_t *uid) {
- char *s;
- uid_t u;
- int r;
-
- assert(uid);
-
- /* Only use audit login uid if we are executed with sufficient
- * capabilities so that pam_loginuid could do its job. If we
- * are lacking the CAP_AUDIT_CONTROL capabality we most likely
- * are being run in a container and /proc/self/loginuid is
- * useless since it probably contains a uid of the host
- * system. */
-
- if (have_effective_cap(CAP_AUDIT_CONTROL) <= 0)
- return -ENOENT;
-
- if (pid == 0)
- r = read_one_line_file("/proc/self/loginuid", &s);
- else {
- char *p;
-
- if (asprintf(&p, "/proc/%lu/loginuid", (unsigned long) pid) < 0)
- return -ENOMEM;
-
- r = read_one_line_file(p, &s);
- free(p);
- }
-
- if (r < 0)
- return r;
-
- r = parse_uid(s, &u);
- free(s);
-
- if (r < 0)
- return r;
-
- if (u == (uid_t) -1)
- return -ENOENT;
-
- *uid = (uid_t) u;
- return 0;
-}
-
-bool display_is_local(const char *display) {
- assert(display);
-
- return
- display[0] == ':' &&
- display[1] >= '0' &&
- display[1] <= '9';
-}
-
-int socket_from_display(const char *display, char **path) {
- size_t k;
- char *f, *c;
-
- assert(display);
- assert(path);
-
- if (!display_is_local(display))
- return -EINVAL;
-
- k = strspn(display+1, "0123456789");
-
- f = new(char, sizeof("/tmp/.X11-unix/X") + k);
- if (!f)
- return -ENOMEM;
-
- c = stpcpy(f, "/tmp/.X11-unix/X");
- memcpy(c, display+1, k);
- c[k] = 0;
-
- *path = f;
-
- return 0;
-}
-
-int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home) {
- struct passwd *p;
- uid_t u;
-
- assert(username);
- assert(*username);
-
- /* We enforce some special rules for uid=0: in order to avoid
- * NSS lookups for root we hardcode its data. */
-
- if (streq(*username, "root") || streq(*username, "0")) {
- *username = "root";
-
- if (uid)
- *uid = 0;
-
- if (gid)
- *gid = 0;
-
- if (home)
- *home = "/root";
- return 0;
- }
-
- 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 (!p)
- return errno != 0 ? -errno : -ESRCH;
-
- if (uid)
- *uid = p->pw_uid;
-
- if (gid)
- *gid = p->pw_gid;
-
- if (home)
- *home = p->pw_dir;
-
- return 0;
-}
-
-int get_group_creds(const char **groupname, gid_t *gid) {
- struct group *g;
- gid_t id;
-
- assert(groupname);
-
- /* We enforce some special rules for gid=0: in order to avoid
- * NSS lookups for root we hardcode its data. */
-
- if (streq(*groupname, "root") || streq(*groupname, "0")) {
- *groupname = "root";
-
- if (gid)
- *gid = 0;
-
- return 0;
- }
-
- if (parse_gid(*groupname, &id) >= 0) {
- errno = 0;
- g = getgrgid(id);
-
- if (g)
- *groupname = g->gr_name;
- } else {
- errno = 0;
- g = getgrnam(*groupname);
- }
-
- if (!g)
- return errno != 0 ? -errno : -ESRCH;
-
- if (gid)
- *gid = g->gr_gid;
-
- return 0;
-}
-
-int in_group(const char *name) {
- gid_t gid, *gids;
- int ngroups_max, r, i;
-
- r = get_group_creds(&name, &gid);
- if (r < 0)
- return r;
-
- if (getgid() == gid)
- return 1;
-
- if (getegid() == gid)
- return 1;
-
- ngroups_max = sysconf(_SC_NGROUPS_MAX);
- assert(ngroups_max > 0);
-
- gids = alloca(sizeof(gid_t) * ngroups_max);
-
- r = getgroups(ngroups_max, gids);
- if (r < 0)
- return -errno;
-
- for (i = 0; i < r; i++)
- if (gids[i] == gid)
- return 1;
-
- return 0;
-}
-
-int glob_exists(const char *path) {
- glob_t g;
- int r, k;
-
- assert(path);
-
- zero(g);
- errno = 0;
- k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g);
-
- 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;
-
- globfree(&g);
-
- return r;
-}
-
-int dirent_ensure_type(DIR *d, struct dirent *de) {
- struct stat st;
-
- assert(d);
- assert(de);
-
- if (de->d_type != DT_UNKNOWN)
- return 0;
-
- if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0)
- return -errno;
-
- 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 in_search_path(const char *path, char **search) {
- char **i, *parent;
- int r;
-
- r = parent_of_path(path, &parent);
- if (r < 0)
- return r;
-
- r = 0;
-
- STRV_FOREACH(i, search) {
- if (path_equal(parent, *i)) {
- r = 1;
- break;
- }
- }
-
- free(parent);
-
- return r;
-}
-
-int get_files_in_directory(const char *path, char ***list) {
- DIR *d;
- int r = 0;
- unsigned n = 0;
- char **l = NULL;
-
- assert(path);
-
- /* Returns all files in a directory in *list, and the number
- * of files as return value. If list is NULL returns only the
- * number */
-
- d = opendir(path);
- if (!d)
- return -errno;
-
- for (;;) {
- struct dirent buffer, *de;
- int k;
-
- k = readdir_r(d, &buffer, &de);
- if (k != 0) {
- r = -k;
- goto finish;
- }
-
- if (!de)
- break;
-
- dirent_ensure_type(d, de);
-
- if (!dirent_is_file(de))
- continue;
-
- if (list) {
- if ((unsigned) r >= n) {
- char **t;
-
- n = MAX(16, 2*r);
- t = realloc(l, sizeof(char*) * n);
- if (!t) {
- r = -ENOMEM;
- goto finish;
- }
-
- l = t;
- }
-
- assert((unsigned) r < n);
-
- l[r] = strdup(de->d_name);
- if (!l[r]) {
- r = -ENOMEM;
- goto finish;
- }
-
- l[++r] = NULL;
- } else
- r++;
- }
-
-finish:
- if (d)
- closedir(d);
-
- if (r >= 0) {
- if (list)
- *list = l;
- } else
- strv_free(l);
-
- return r;
-}
-
-char *join(const char *x, ...) {
- va_list ap;
- size_t l;
- char *r, *p;
-
- va_start(ap, x);
-
- if (x) {
- l = strlen(x);
-
- for (;;) {
- const char *t;
-
- t = va_arg(ap, const char *);
- if (!t)
- break;
-
- l += strlen(t);
- }
- } else
- l = 0;
-
- va_end(ap);
-
- r = new(char, l+1);
- if (!r)
- return NULL;
-
- if (x) {
- p = stpcpy(r, x);
-
- va_start(ap, x);
-
- for (;;) {
- const char *t;
-
- t = va_arg(ap, const char *);
- if (!t)
- break;
-
- p = stpcpy(p, t);
- }
-
- va_end(ap);
- } else
- r[0] = 0;
-
- return r;
-}
-
-bool is_main_thread(void) {
- static __thread int cached = 0;
-
- if (_unlikely_(cached == 0))
- cached = getpid() == gettid() ? 1 : -1;
-
- return cached > 0;
-}
-
-int block_get_whole_disk(dev_t d, dev_t *ret) {
- char *p, *s;
- int r;
- unsigned n, m;
-
- assert(ret);
-
- /* If it has a queue this is good enough for us */
- if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0)
- return -ENOMEM;
-
- r = access(p, F_OK);
- free(p);
-
- if (r >= 0) {
- *ret = d;
- return 0;
- }
-
- /* If it is a partition find the originating device */
- if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0)
- return -ENOMEM;
-
- r = access(p, F_OK);
- free(p);
-
- if (r < 0)
- return -ENOENT;
-
- /* Get parent dev_t */
- if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0)
- return -ENOMEM;
-
- r = read_one_line_file(p, &s);
- free(p);
-
- if (r < 0)
- return r;
-
- r = sscanf(s, "%u:%u", &m, &n);
- free(s);
-
- if (r != 2)
- return -EINVAL;
-
- /* Only return this if it is really good enough for us. */
- if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0)
- return -ENOMEM;
-
- r = access(p, F_OK);
- free(p);
-
- if (r >= 0) {
- *ret = makedev(m, n);
- return 0;
- }
-
- return -ENOENT;
-}
-
-int file_is_priv_sticky(const char *p) {
- struct stat st;
-
- assert(p);
-
- if (lstat(p, &st) < 0)
- return -errno;
-
- return
- (st.st_uid == 0 || st.st_uid == getuid()) &&
- (st.st_mode & S_ISVTX);
-}
-
-static const char *const ioprio_class_table[] = {
- [IOPRIO_CLASS_NONE] = "none",
- [IOPRIO_CLASS_RT] = "realtime",
- [IOPRIO_CLASS_BE] = "best-effort",
- [IOPRIO_CLASS_IDLE] = "idle"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int);
-
-static const char *const sigchld_code_table[] = {
- [CLD_EXITED] = "exited",
- [CLD_KILLED] = "killed",
- [CLD_DUMPED] = "dumped",
- [CLD_TRAPPED] = "trapped",
- [CLD_STOPPED] = "stopped",
- [CLD_CONTINUED] = "continued",
-};
-
-DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int);
-
-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_DAEMON)] = "daemon",
- [LOG_FAC(LOG_AUTH)] = "auth",
- [LOG_FAC(LOG_SYSLOG)] = "syslog",
- [LOG_FAC(LOG_LPR)] = "lpr",
- [LOG_FAC(LOG_NEWS)] = "news",
- [LOG_FAC(LOG_UUCP)] = "uucp",
- [LOG_FAC(LOG_CRON)] = "cron",
- [LOG_FAC(LOG_AUTHPRIV)] = "authpriv",
- [LOG_FAC(LOG_FTP)] = "ftp",
- [LOG_FAC(LOG_LOCAL0)] = "local0",
- [LOG_FAC(LOG_LOCAL1)] = "local1",
- [LOG_FAC(LOG_LOCAL2)] = "local2",
- [LOG_FAC(LOG_LOCAL3)] = "local3",
- [LOG_FAC(LOG_LOCAL4)] = "local4",
- [LOG_FAC(LOG_LOCAL5)] = "local5",
- [LOG_FAC(LOG_LOCAL6)] = "local6",
- [LOG_FAC(LOG_LOCAL7)] = "local7"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(log_facility_unshifted, int);
-
-static const char *const log_level_table[] = {
- [LOG_EMERG] = "emerg",
- [LOG_ALERT] = "alert",
- [LOG_CRIT] = "crit",
- [LOG_ERR] = "err",
- [LOG_WARNING] = "warning",
- [LOG_NOTICE] = "notice",
- [LOG_INFO] = "info",
- [LOG_DEBUG] = "debug"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(log_level, int);
-
-static const char* const sched_policy_table[] = {
- [SCHED_OTHER] = "other",
- [SCHED_BATCH] = "batch",
- [SCHED_IDLE] = "idle",
- [SCHED_FIFO] = "fifo",
- [SCHED_RR] = "rr"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(sched_policy, int);
-
-static const char* const rlimit_table[] = {
- [RLIMIT_CPU] = "LimitCPU",
- [RLIMIT_FSIZE] = "LimitFSIZE",
- [RLIMIT_DATA] = "LimitDATA",
- [RLIMIT_STACK] = "LimitSTACK",
- [RLIMIT_CORE] = "LimitCORE",
- [RLIMIT_RSS] = "LimitRSS",
- [RLIMIT_NOFILE] = "LimitNOFILE",
- [RLIMIT_AS] = "LimitAS",
- [RLIMIT_NPROC] = "LimitNPROC",
- [RLIMIT_MEMLOCK] = "LimitMEMLOCK",
- [RLIMIT_LOCKS] = "LimitLOCKS",
- [RLIMIT_SIGPENDING] = "LimitSIGPENDING",
- [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE",
- [RLIMIT_NICE] = "LimitNICE",
- [RLIMIT_RTPRIO] = "LimitRTPRIO",
- [RLIMIT_RTTIME] = "LimitRTTIME"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(rlimit, int);
-
-static const char* const ip_tos_table[] = {
- [IPTOS_LOWDELAY] = "low-delay",
- [IPTOS_THROUGHPUT] = "throughput",
- [IPTOS_RELIABILITY] = "reliability",
- [IPTOS_LOWCOST] = "low-cost",
-};
-
-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_PRIVATE_STRING_TABLE_LOOKUP(__signal, int);
-
-const char *signal_to_string(int signo) {
- static __thread char buf[12];
- const char *name;
-
- name = __signal_to_string(signo);
- if (name)
- return name;
-
- if (signo >= SIGRTMIN && signo <= SIGRTMAX)
- snprintf(buf, sizeof(buf) - 1, "RTMIN+%d", signo - SIGRTMIN);
- else
- snprintf(buf, sizeof(buf) - 1, "%d", signo);
- char_array_0(buf);
- return buf;
-}
-
-int signal_from_string(const char *s) {
- int signo;
- int offset = 0;
- unsigned u;
-
- signo =__signal_from_string(s);
- if (signo > 0)
- return signo;
-
- if (startswith(s, "RTMIN+")) {
- s += 6;
- offset = SIGRTMIN;
- }
- if (safe_atou(s, &u) >= 0) {
- signo = (int) u + offset;
- if (signo > 0 && signo < _NSIG)
- return signo;
- }
- return -1;
-}
-
-bool kexec_loaded(void) {
- bool loaded = false;
- char *s;
-
- if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) {
- if (s[0] == '1')
- loaded = true;
- free(s);
- }
- return loaded;
-}
-
-int strdup_or_null(const char *a, char **b) {
- char *c;
-
- assert(b);
-
- if (!a) {
- *b = NULL;
- return 0;
- }
-
- c = strdup(a);
- if (!c)
- return -ENOMEM;
-
- *b = c;
- return 0;
-}
-
-int prot_from_flags(int flags) {
-
- switch (flags & O_ACCMODE) {
-
- case O_RDONLY:
- return PROT_READ;
-
- case O_WRONLY:
- return PROT_WRITE;
-
- case O_RDWR:
- return PROT_READ|PROT_WRITE;
-
- default:
- return -EINVAL;
- }
-}
-
-unsigned long cap_last_cap(void) {
- static __thread unsigned long saved;
- static __thread bool valid = false;
- unsigned long p;
-
- if (valid)
- return saved;
-
- p = (unsigned long) CAP_LAST_CAP;
-
- if (prctl(PR_CAPBSET_READ, p) < 0) {
-
- /* Hmm, look downwards, until we find one that
- * works */
- for (p--; p > 0; p --)
- if (prctl(PR_CAPBSET_READ, p) >= 0)
- break;
-
- } else {
-
- /* Hmm, look upwards, until we find one that doesn't
- * work */
- for (;; p++)
- if (prctl(PR_CAPBSET_READ, p+1) < 0)
- break;
- }
-
- saved = p;
- valid = true;
-
- return p;
-}
-
-char *format_bytes(char *buf, size_t l, off_t t) {
- unsigned i;
-
- static const struct {
- const char *suffix;
- off_t factor;
- } table[] = {
- { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL },
- { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL },
- { "T", 1024ULL*1024ULL*1024ULL*1024ULL },
- { "G", 1024ULL*1024ULL*1024ULL },
- { "M", 1024ULL*1024ULL },
- { "K", 1024ULL },
- };
-
- for (i = 0; i < ELEMENTSOF(table); i++) {
-
- if (t >= table[i].factor) {
- snprintf(buf, l,
- "%llu.%llu%s",
- (unsigned long long) (t / table[i].factor),
- (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL),
- table[i].suffix);
-
- goto finish;
- }
- }
-
- snprintf(buf, l, "%lluB", (unsigned long long) t);
-
-finish:
- buf[l-1] = 0;
- return buf;
-
-}
-
-void* memdup(const void *p, size_t l) {
- void *r;
-
- assert(p);
-
- r = malloc(l);
- if (!r)
- return NULL;
-
- memcpy(r, p, l);
- return r;
-}
-
-int fd_inc_sndbuf(int fd, size_t n) {
- int r, value;
- socklen_t l = sizeof(value);
-
- r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l);
- if (r >= 0 &&
- l == sizeof(value) &&
- (size_t) value >= n*2)
- return 0;
-
- value = (int) n;
- r = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value));
- if (r < 0)
- return -errno;
-
- return 1;
-}
-
-int fd_inc_rcvbuf(int fd, size_t n) {
- int r, value;
- socklen_t l = sizeof(value);
-
- r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l);
- if (r >= 0 &&
- l == sizeof(value) &&
- (size_t) value >= n*2)
- return 0;
-
- value = (int) n;
- r = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value));
- if (r < 0)
- return -errno;
-
- return 1;
-}
~ianmdlvl / elogind.git / blobdiff