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 <libintl.h>
#include <stdio.h>
#include <syslog.h>
#include <sched.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/poll.h>
+#include <poll.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/time.h>
#include <glob.h>
#include <locale.h>
#include <sys/personality.h>
#include <sys/xattr.h>
-#include <libgen.h>
#include <sys/statvfs.h>
+#include <sys/file.h>
#include <linux/fs.h>
+
+/* When we include libgen.h because we need dirname() we immediately
+ * undefine basename() since libgen.h defines it as a macro to the XDG
+ * version which is really broken. */
+#include <libgen.h>
#undef basename
#ifdef HAVE_SYS_AUXV_H
#include <sys/auxv.h>
#endif
+#include "config.h"
#include "macro.h"
#include "util.h"
#include "ioprio.h"
#include "missing.h"
#include "log.h"
#include "strv.h"
-#include "label.h"
#include "mkdir.h"
#include "path-util.h"
#include "exit-status.h"
#include "virt.h"
#include "def.h"
#include "sparse-endian.h"
+#include "formats-util.h"
+#include "process-util.h"
+#include "random-util.h"
+#include "terminal-util.h"
+
+/* Put this test here for a lack of better place */
+assert_cc(EAGAIN == EWOULDBLOCK);
int saved_argc = 0;
char **saved_argv = NULL;
-static volatile unsigned cached_columns = 0;
-static volatile unsigned cached_lines = 0;
-
size_t page_size(void) {
static thread_local size_t pgsz = 0;
long r;
return (char*) p;
}
-static size_t cescape_char(char c, char *buf) {
+size_t cescape_char(char c, char *buf) {
char * buf_old = buf;
switch (c) {
int r;
assert(s);
- assert(ret_uid);
r = safe_atolu(s, &ul);
if (r < 0)
if (uid == (uid_t) 0xFFFF)
return -ENXIO;
- *ret_uid = uid;
+ if (ret_uid)
+ *ret_uid = uid;
+
return 0;
}
int safe_atod(const char *s, double *ret_d) {
char *x = NULL;
double d = 0;
+ locale_t loc;
assert(s);
assert(ret_d);
- RUN_WITH_LOCALE(LC_NUMERIC_MASK, "C") {
- errno = 0;
- d = strtod(s, &x);
- }
+ loc = newlocale(LC_NUMERIC_MASK, "C", (locale_t) 0);
+ if (loc == (locale_t) 0)
+ return -errno;
- if (!x || x == s || *x || errno)
+ errno = 0;
+ d = strtod_l(s, &x, loc);
+
+ if (!x || x == s || *x || errno) {
+ freelocale(loc);
return errno ? -errno : -EINVAL;
+ }
+ freelocale(loc);
*ret_d = (double) d;
return 0;
}
return current;
}
-int get_parent_of_pid(pid_t pid, pid_t *_ppid) {
- int r;
- _cleanup_free_ char *line = NULL;
- long unsigned ppid;
- const char *p;
-
- assert(pid >= 0);
- assert(_ppid);
-
- if (pid == 0) {
- *_ppid = getppid();
- return 0;
- }
-
- p = procfs_file_alloca(pid, "stat");
- r = read_one_line_file(p, &line);
- if (r < 0)
- return r;
-
- /* 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 */
-
- p = strrchr(line, ')');
- if (!p)
- 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 fchmod_umask(int fd, mode_t m) {
mode_t u;
int r;
return s;
}
-int get_process_state(pid_t pid) {
- const char *p;
- char state;
- int r;
- _cleanup_free_ char *line = NULL;
-
- assert(pid >= 0);
-
- p = procfs_file_alloca(pid, "stat");
- r = read_one_line_file(p, &line);
- if (r < 0)
- return r;
-
- p = strrchr(line, ')');
- if (!p)
- return -EIO;
-
- p++;
-
- if (sscanf(p, " %c", &state) != 1)
- return -EIO;
-
- return (unsigned char) state;
-}
-
-int get_process_comm(pid_t pid, char **name) {
- const char *p;
- int r;
-
- assert(name);
- assert(pid >= 0);
-
- p = procfs_file_alloca(pid, "comm");
-
- r = read_one_line_file(p, name);
- if (r == -ENOENT)
- return -ESRCH;
-
- return r;
-}
-
-int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) {
- _cleanup_fclose_ FILE *f = NULL;
- char *r = NULL, *k;
- const char *p;
- int c;
-
- assert(line);
- assert(pid >= 0);
-
- p = procfs_file_alloca(pid, "cmdline");
-
- f = fopen(p, "re");
- if (!f)
- return -errno;
-
- if (max_length == 0) {
- size_t len = 0, allocated = 0;
-
- while ((c = getc(f)) != EOF) {
-
- if (!GREEDY_REALLOC(r, allocated, len+2)) {
- free(r);
- return -ENOMEM;
- }
-
- r[len++] = isprint(c) ? c : ' ';
- }
-
- if (len > 0)
- r[len-1] = 0;
-
- } else {
- bool space = false;
- size_t left;
-
- r = new(char, max_length);
- if (!r)
- 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;
- }
-
- /* Kernel threads have no argv[] */
- if (isempty(r)) {
- _cleanup_free_ char *t = NULL;
- int h;
-
- free(r);
-
- if (!comm_fallback)
- return -ENOENT;
-
- h = get_process_comm(pid, &t);
- if (h < 0)
- return h;
-
- r = strjoin("[", t, "]", NULL);
- if (!r)
- return -ENOMEM;
- }
-
- *line = r;
- return 0;
-}
-
-int is_kernel_thread(pid_t pid) {
- const char *p;
- size_t count;
- char c;
- bool eof;
- FILE *f;
-
- if (pid == 0)
- return 0;
-
- assert(pid > 0);
-
- p = procfs_file_alloca(pid, "cmdline");
- f = fopen(p, "re");
- 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_capeff(pid_t pid, char **capeff) {
- const char *p;
-
- assert(capeff);
- assert(pid >= 0);
-
- p = procfs_file_alloca(pid, "status");
-
- return get_status_field(p, "\nCapEff:", capeff);
-}
-
-static int get_process_link_contents(const char *proc_file, char **name) {
- int r;
-
- assert(proc_file);
- assert(name);
-
- r = readlink_malloc(proc_file, name);
- if (r < 0)
- return r == -ENOENT ? -ESRCH : r;
-
- return 0;
-}
-
-int get_process_exe(pid_t pid, char **name) {
- const char *p;
- char *d;
- int r;
-
- assert(pid >= 0);
-
- p = procfs_file_alloca(pid, "exe");
- r = get_process_link_contents(p, name);
- if (r < 0)
- return r;
-
- d = endswith(*name, " (deleted)");
- if (d)
- *d = '\0';
-
- return 0;
-}
-
-static int get_process_id(pid_t pid, const char *field, uid_t *uid) {
- _cleanup_fclose_ FILE *f = NULL;
- char line[LINE_MAX];
- const char *p;
-
- assert(field);
- assert(uid);
-
- if (pid == 0)
- return getuid();
-
- p = procfs_file_alloca(pid, "status");
- f = fopen(p, "re");
- if (!f)
- return -errno;
-
- FOREACH_LINE(line, f, return -errno) {
- char *l;
-
- l = strstrip(line);
-
- if (startswith(l, field)) {
- l += strlen(field);
- l += strspn(l, WHITESPACE);
-
- l[strcspn(l, WHITESPACE)] = 0;
-
- return parse_uid(l, uid);
- }
- }
-
- return -EIO;
-}
-
-int get_process_uid(pid_t pid, uid_t *uid) {
- return get_process_id(pid, "Uid:", uid);
-}
-
-int get_process_gid(pid_t pid, gid_t *gid) {
- assert_cc(sizeof(uid_t) == sizeof(gid_t));
- return get_process_id(pid, "Gid:", gid);
-}
-
-int get_process_cwd(pid_t pid, char **cwd) {
- const char *p;
-
- assert(pid >= 0);
-
- p = procfs_file_alloca(pid, "cwd");
-
- return get_process_link_contents(p, cwd);
-}
-
-int get_process_root(pid_t pid, char **root) {
- const char *p;
-
- assert(pid >= 0);
-
- p = procfs_file_alloca(pid, "root");
-
- return get_process_link_contents(p, root);
-}
-
-int get_process_environ(pid_t pid, char **env) {
- _cleanup_fclose_ FILE *f = NULL;
- _cleanup_free_ char *outcome = NULL;
- int c;
- const char *p;
- size_t allocated = 0, sz = 0;
-
- assert(pid >= 0);
- assert(env);
-
- p = procfs_file_alloca(pid, "environ");
-
- f = fopen(p, "re");
- if (!f)
- return -errno;
-
- while ((c = fgetc(f)) != EOF) {
- if (!GREEDY_REALLOC(outcome, allocated, sz + 5))
- return -ENOMEM;
-
- if (c == '\0')
- outcome[sz++] = '\n';
- else
- sz += cescape_char(c, outcome + sz);
- }
-
- outcome[sz] = '\0';
- *env = outcome;
- outcome = NULL;
-
- return 0;
-}
-
char *strnappend(const char *s, const char *suffix, size_t b) {
size_t a;
char *r;
assert(s);
- /* Does C style string escaping. */
+ /* Does C style string escaping. May be reversed with
+ * cunescape(). */
r = new(char, strlen(s)*4 + 1);
if (!r)
return r;
}
-char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) {
- char *r, *t;
- const char *f;
- size_t pl;
+static int cunescape_one(const char *p, size_t length, char *ret, uint32_t *ret_unicode) {
+ int r = 1;
- assert(s);
+ assert(p);
+ assert(*p);
+ assert(ret);
- /* Undoes C style string escaping, and optionally prefixes it. */
+ /* Unescapes C style. Returns the unescaped character in ret,
+ * unless we encountered a \u sequence in which case the full
+ * unicode character is returned in ret_unicode, instead. */
- pl = prefix ? strlen(prefix) : 0;
+ if (length != (size_t) -1 && length < 1)
+ return -EINVAL;
- r = new(char, pl+length+1);
- if (!r)
- return NULL;
+ switch (p[0]) {
+
+ case 'a':
+ *ret = '\a';
+ break;
+ case 'b':
+ *ret = '\b';
+ break;
+ case 'f':
+ *ret = '\f';
+ break;
+ case 'n':
+ *ret = '\n';
+ break;
+ case 'r':
+ *ret = '\r';
+ break;
+ case 't':
+ *ret = '\t';
+ break;
+ case 'v':
+ *ret = '\v';
+ break;
+ case '\\':
+ *ret = '\\';
+ break;
+ case '"':
+ *ret = '"';
+ break;
+ case '\'':
+ *ret = '\'';
+ break;
+
+ case 's':
+ /* This is an extension of the XDG syntax files */
+ *ret = ' ';
+ break;
+
+ case 'x': {
+ /* hexadecimal encoding */
+ int a, b;
- if (prefix)
- memcpy(r, prefix, pl);
+ if (length != (size_t) -1 && length < 3)
+ return -EINVAL;
- for (f = s, t = r + pl; f < s + length; f++) {
+ a = unhexchar(p[1]);
+ if (a < 0)
+ return -EINVAL;
- if (*f != '\\') {
- *(t++) = *f;
- continue;
- }
+ b = unhexchar(p[2]);
+ if (b < 0)
+ return -EINVAL;
- f++;
+ /* Don't allow NUL bytes */
+ if (a == 0 && b == 0)
+ return -EINVAL;
- switch (*f) {
+ *ret = (char) ((a << 4U) | b);
+ r = 3;
+ break;
+ }
- 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 'u': {
+ /* C++11 style 16bit unicode */
- case 's':
- /* This is an extension of the XDG syntax files */
- *(t++) = ' ';
- break;
+ int a[4];
+ unsigned i;
+ uint32_t c;
- case 'x': {
- /* hexadecimal encoding */
- int a, b;
+ if (length != (size_t) -1 && length < 5)
+ return -EINVAL;
- a = unhexchar(f[1]);
- b = unhexchar(f[2]);
+ for (i = 0; i < 4; i++) {
+ a[i] = unhexchar(p[1 + i]);
+ if (a[i] < 0)
+ return a[i];
+ }
- if (a < 0 || b < 0 || (a == 0 && b == 0)) {
- /* Invalid escape code, let's take it literal then */
- *(t++) = '\\';
- *(t++) = 'x';
- } else {
- *(t++) = (char) ((a << 4) | b);
- f += 2;
- }
+ c = ((uint32_t) a[0] << 12U) | ((uint32_t) a[1] << 8U) | ((uint32_t) a[2] << 4U) | (uint32_t) a[3];
- break;
- }
+ /* Don't allow 0 chars */
+ if (c == 0)
+ return -EINVAL;
- 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 || (a == 0 && b == 0 && c == 0)) {
+ if (c < 128)
+ *ret = c;
+ else {
+ if (!ret_unicode)
+ return -EINVAL;
+
+ *ret = 0;
+ *ret_unicode = c;
+ }
+
+ r = 5;
+ break;
+ }
+
+ case 'U': {
+ /* C++11 style 32bit unicode */
+
+ int a[8];
+ unsigned i;
+ uint32_t c;
+
+ if (length != (size_t) -1 && length < 9)
+ return -EINVAL;
+
+ for (i = 0; i < 8; i++) {
+ a[i] = unhexchar(p[1 + i]);
+ if (a[i] < 0)
+ return a[i];
+ }
+
+ c = ((uint32_t) a[0] << 28U) | ((uint32_t) a[1] << 24U) | ((uint32_t) a[2] << 20U) | ((uint32_t) a[3] << 16U) |
+ ((uint32_t) a[4] << 12U) | ((uint32_t) a[5] << 8U) | ((uint32_t) a[6] << 4U) | (uint32_t) a[7];
+
+ /* Don't allow 0 chars */
+ if (c == 0)
+ return -EINVAL;
+
+ /* Don't allow invalid code points */
+ if (!unichar_is_valid(c))
+ return -EINVAL;
+
+ if (c < 128)
+ *ret = c;
+ else {
+ if (!ret_unicode)
+ return -EINVAL;
+
+ *ret = 0;
+ *ret_unicode = c;
+ }
+
+ r = 9;
+ break;
+ }
+
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7': {
+ /* octal encoding */
+ int a, b, c;
+ uint32_t m;
+
+ if (length != (size_t) -1 && length < 4)
+ return -EINVAL;
+
+ a = unoctchar(p[0]);
+ if (a < 0)
+ return -EINVAL;
+
+ b = unoctchar(p[1]);
+ if (b < 0)
+ return -EINVAL;
+
+ c = unoctchar(p[2]);
+ if (c < 0)
+ return -EINVAL;
+
+ /* don't allow NUL bytes */
+ if (a == 0 && b == 0 && c == 0)
+ return -EINVAL;
+
+ /* Don't allow bytes above 255 */
+ m = ((uint32_t) a << 6U) | ((uint32_t) b << 3U) | (uint32_t) c;
+ if (m > 255)
+ return -EINVAL;
+
+ *ret = m;
+ r = 3;
+ break;
+ }
+
+ default:
+ return -EINVAL;
+ }
+
+ return r;
+}
+
+int cunescape_length_with_prefix(const char *s, size_t length, const char *prefix, UnescapeFlags flags, char **ret) {
+ char *r, *t;
+ const char *f;
+ size_t pl;
+
+ assert(s);
+ assert(ret);
+
+ /* Undoes C style string escaping, and optionally prefixes it. */
+
+ pl = prefix ? strlen(prefix) : 0;
+
+ r = new(char, pl+length+1);
+ if (!r)
+ return -ENOMEM;
+
+ if (prefix)
+ memcpy(r, prefix, pl);
+
+ for (f = s, t = r + pl; f < s + length; f++) {
+ size_t remaining;
+ uint32_t u;
+ char c;
+ int k;
+
+ remaining = s + length - f;
+ assert(remaining > 0);
+
+ if (*f != '\\') {
+ /* A literal literal, copy verbatim */
+ *(t++) = *f;
+ continue;
+ }
+
+ if (remaining == 1) {
+ if (flags & UNESCAPE_RELAX) {
+ /* A trailing backslash, copy verbatim */
+ *(t++) = *f;
+ continue;
+ }
+
+ free(r);
+ return -EINVAL;
+ }
+
+ k = cunescape_one(f + 1, remaining - 1, &c, &u);
+ if (k < 0) {
+ if (flags & UNESCAPE_RELAX) {
/* Invalid escape code, let's take it literal then */
*(t++) = '\\';
- *(t++) = f[0];
- } else {
- *(t++) = (char) ((a << 6) | (b << 3) | c);
- f += 2;
+ continue;
}
- break;
+ free(r);
+ return k;
}
- case 0:
- /* premature end of string. */
- *(t++) = '\\';
- goto finish;
+ if (c != 0)
+ /* Non-Unicode? Let's encode this directly */
+ *(t++) = c;
+ else
+ /* Unicode? Then let's encode this in UTF-8 */
+ t += utf8_encode_unichar(t, u);
- default:
- /* Invalid escape code, let's take it literal then */
- *(t++) = '\\';
- *(t++) = *f;
- break;
- }
+ f += k;
}
-finish:
*t = 0;
- return r;
-}
-char *cunescape_length(const char *s, size_t length) {
- return cunescape_length_with_prefix(s, length, NULL);
+ *ret = r;
+ return t - r;
}
-char *cunescape(const char *s) {
- assert(s);
+int cunescape_length(const char *s, size_t length, UnescapeFlags flags, char **ret) {
+ return cunescape_length_with_prefix(s, length, NULL, flags, ret);
+}
- return cunescape_length(s, strlen(s));
+int cunescape(const char *s, UnescapeFlags flags, char **ret) {
+ return cunescape_length(s, strlen(s), flags, ret);
}
char *xescape(const char *s, const char *bad) {
/* Escapes all chars in bad, in addition to \ and all special
* chars, in \xFF style escaping. May be reversed with
- * cunescape. */
+ * cunescape(). */
r = new(char, strlen(s) * 4 + 1);
if (!r)
endswith(filename, ".dpkg-old") ||
endswith(filename, ".dpkg-new") ||
endswith(filename, ".dpkg-tmp") ||
+ endswith(filename, ".dpkg-dist") ||
+ endswith(filename, ".dpkg-bak") ||
+ endswith(filename, ".dpkg-backup") ||
+ endswith(filename, ".dpkg-remove") ||
endswith(filename, ".swp");
}
bool fstype_is_network(const char *fstype) {
static const char table[] =
+ "afs\0"
"cifs\0"
"smbfs\0"
"sshfs\0"
return nulstr_contains(table, fstype);
}
-int chvt(int vt) {
- _cleanup_close_ int fd;
+int flush_fd(int fd) {
+ struct pollfd pollfd = {
+ .fd = fd,
+ .events = POLLIN,
+ };
- fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC);
- if (fd < 0)
- return -errno;
+ for (;;) {
+ char buf[LINE_MAX];
+ ssize_t l;
+ int r;
- if (vt < 0) {
- int tiocl[2] = {
- TIOCL_GETKMSGREDIRECT,
- 0
- };
+ r = poll(&pollfd, 1, 0);
+ if (r < 0) {
+ if (errno == EINTR)
+ continue;
- if (ioctl(fd, TIOCLINUX, tiocl) < 0)
return -errno;
- vt = tiocl[0] <= 0 ? 1 : tiocl[0];
- }
-
- if (ioctl(fd, VT_ACTIVATE, vt) < 0)
- return -errno;
+ } else if (r == 0)
+ return 0;
- return 0;
-}
+ l = read(fd, buf, sizeof(buf));
+ if (l < 0) {
-int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) {
- struct termios old_termios, new_termios;
- char c, line[LINE_MAX];
+ if (errno == EINTR)
+ continue;
- assert(f);
- assert(ret);
+ if (errno == EAGAIN)
+ return 0;
- if (tcgetattr(fileno(f), &old_termios) >= 0) {
- new_termios = old_termios;
+ return -errno;
+ } else if (l == 0)
+ return 0;
+ }
+}
- new_termios.c_lflag &= ~ICANON;
- new_termios.c_cc[VMIN] = 1;
- new_termios.c_cc[VTIME] = 0;
+int sigaction_many(const struct sigaction *sa, ...) {
+ va_list ap;
+ int r = 0, sig;
- if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) {
- size_t k;
+ va_start(ap, sa);
+ while ((sig = va_arg(ap, int)) > 0)
+ if (sigaction(sig, sa, NULL) < 0)
+ r = -errno;
+ va_end(ap);
- if (t != USEC_INFINITY) {
- if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) {
- tcsetattr(fileno(f), TCSADRAIN, &old_termios);
- return -ETIMEDOUT;
- }
- }
+ return r;
+}
- k = fread(&c, 1, 1, f);
+int ignore_signals(int sig, ...) {
+ struct sigaction sa = {
+ .sa_handler = SIG_IGN,
+ .sa_flags = SA_RESTART,
+ };
+ va_list ap;
+ int r = 0;
- tcsetattr(fileno(f), TCSADRAIN, &old_termios);
+ if (sigaction(sig, &sa, NULL) < 0)
+ r = -errno;
- if (k <= 0)
- return -EIO;
+ va_start(ap, sig);
+ while ((sig = va_arg(ap, int)) > 0)
+ if (sigaction(sig, &sa, NULL) < 0)
+ r = -errno;
+ va_end(ap);
- if (need_nl)
- *need_nl = c != '\n';
+ return r;
+}
- *ret = c;
- return 0;
- }
- }
+int default_signals(int sig, ...) {
+ struct sigaction sa = {
+ .sa_handler = SIG_DFL,
+ .sa_flags = SA_RESTART,
+ };
+ va_list ap;
+ int r = 0;
- if (t != USEC_INFINITY) {
- if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0)
- return -ETIMEDOUT;
- }
+ if (sigaction(sig, &sa, NULL) < 0)
+ r = -errno;
- errno = 0;
- if (!fgets(line, sizeof(line), f))
- return errno ? -errno : -EIO;
+ va_start(ap, sig);
+ while ((sig = va_arg(ap, int)) > 0)
+ if (sigaction(sig, &sa, NULL) < 0)
+ r = -errno;
+ va_end(ap);
- truncate_nl(line);
+ return r;
+}
- if (strlen(line) != 1)
- return -EBADMSG;
+void safe_close_pair(int p[]) {
+ assert(p);
- if (need_nl)
- *need_nl = false;
+ if (p[0] == p[1]) {
+ /* Special case pairs which use the same fd in both
+ * directions... */
+ p[0] = p[1] = safe_close(p[0]);
+ return;
+ }
- *ret = line[0];
- return 0;
+ p[0] = safe_close(p[0]);
+ p[1] = safe_close(p[1]);
}
-int ask_char(char *ret, const char *replies, const char *text, ...) {
- int r;
-
- assert(ret);
- assert(replies);
- assert(text);
-
- for (;;) {
- va_list ap;
- char c;
- bool need_nl = true;
+ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) {
+ uint8_t *p = buf;
+ ssize_t n = 0;
- if (on_tty())
- fputs(ANSI_HIGHLIGHT_ON, stdout);
+ assert(fd >= 0);
+ assert(buf);
- va_start(ap, text);
- vprintf(text, ap);
- va_end(ap);
+ while (nbytes > 0) {
+ ssize_t k;
- if (on_tty())
- fputs(ANSI_HIGHLIGHT_OFF, stdout);
+ k = read(fd, p, nbytes);
+ if (k < 0) {
+ if (errno == EINTR)
+ continue;
- fflush(stdout);
+ if (errno == EAGAIN && do_poll) {
- r = read_one_char(stdin, &c, USEC_INFINITY, &need_nl);
- if (r < 0) {
+ /* We knowingly ignore any return value here,
+ * and expect that any error/EOF is reported
+ * via read() */
- if (r == -EBADMSG) {
- puts("Bad input, please try again.");
+ fd_wait_for_event(fd, POLLIN, USEC_INFINITY);
continue;
}
- putchar('\n');
- return r;
+ return n > 0 ? n : -errno;
}
- if (need_nl)
- putchar('\n');
-
- if (strchr(replies, c)) {
- *ret = c;
- return 0;
- }
+ if (k == 0)
+ return n;
- puts("Read unexpected character, please try again.");
+ p += k;
+ nbytes -= k;
+ n += k;
}
+
+ return n;
}
-int ask_string(char **ret, const char *text, ...) {
- assert(ret);
- assert(text);
+int loop_read_exact(int fd, void *buf, size_t nbytes, bool do_poll) {
+ ssize_t n;
- for (;;) {
- char line[LINE_MAX];
- va_list ap;
+ n = loop_read(fd, buf, nbytes, do_poll);
+ if (n < 0)
+ return n;
+ if ((size_t) n != nbytes)
+ return -EIO;
+ return 0;
+}
- if (on_tty())
- fputs(ANSI_HIGHLIGHT_ON, stdout);
+int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) {
+ const uint8_t *p = buf;
- va_start(ap, text);
- vprintf(text, ap);
- va_end(ap);
+ assert(fd >= 0);
+ assert(buf);
- if (on_tty())
- fputs(ANSI_HIGHLIGHT_OFF, stdout);
+ errno = 0;
- fflush(stdout);
+ while (nbytes > 0) {
+ ssize_t k;
- errno = 0;
- if (!fgets(line, sizeof(line), stdin))
- return errno ? -errno : -EIO;
+ k = write(fd, p, nbytes);
+ if (k < 0) {
+ if (errno == EINTR)
+ continue;
- if (!endswith(line, "\n"))
- putchar('\n');
- else {
- char *s;
+ if (errno == EAGAIN && do_poll) {
+ /* We knowingly ignore any return value here,
+ * and expect that any error/EOF is reported
+ * via write() */
- if (isempty(line))
+ fd_wait_for_event(fd, POLLOUT, USEC_INFINITY);
continue;
+ }
- truncate_nl(line);
- s = strdup(line);
- if (!s)
- return -ENOMEM;
-
- *ret = s;
- return 0;
+ return -errno;
}
- }
-}
-
-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 (k == 0) /* Can't really happen */
+ return -EIO;
- if (tcgetattr(fd, &termios) < 0) {
- r = -errno;
- goto finish;
+ p += k;
+ nbytes -= k;
}
- /* 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) {
- _cleanup_close_ int fd = -1;
-
- fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
- if (fd < 0)
- return fd;
-
- return reset_terminal_fd(fd, true);
+ return 0;
}
-int open_terminal(const char *name, int mode) {
- int fd, r;
- unsigned c = 0;
+int parse_size(const char *t, off_t base, off_t *size) {
- /*
- * 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.
+ /* Soo, sometimes we want to parse IEC binary suffxies, and
+ * sometimes SI decimal suffixes. This function can parse
+ * both. Which one is the right way depends on the
+ * context. Wikipedia suggests that SI is customary for
+ * hardware metrics and network speeds, while IEC is
+ * customary for most data sizes used by software and volatile
+ * (RAM) memory. Hence be careful which one you pick!
*
- * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245
- */
-
- assert(!(mode & O_CREAT));
-
- for (;;) {
- fd = open(name, mode, 0);
- if (fd >= 0)
- break;
-
- if (errno != EIO)
- return -errno;
-
- /* Max 1s in total */
- if (c >= 20)
- return -errno;
-
- usleep(50 * USEC_PER_MSEC);
- c++;
- }
-
- r = isatty(fd);
- if (r < 0) {
- safe_close(fd);
- return -errno;
- }
-
- if (!r) {
- safe_close(fd);
- return -ENOTTY;
- }
-
- return fd;
-}
+ * In either case we use just K, M, G as suffix, and not Ki,
+ * Mi, Gi or so (as IEC would suggest). That's because that's
+ * frickin' ugly. But this means you really need to make sure
+ * to document which base you are parsing when you use this
+ * call. */
-int flush_fd(int fd) {
- struct pollfd pollfd = {
- .fd = fd,
- .events = POLLIN,
+ struct table {
+ const char *suffix;
+ unsigned long long factor;
};
- for (;;) {
- char buf[LINE_MAX];
- ssize_t l;
- int r;
-
- r = poll(&pollfd, 1, 0);
- if (r < 0) {
- if (errno == EINTR)
- continue;
-
- return -errno;
-
- } else if (r == 0)
- return 0;
-
- l = read(fd, buf, sizeof(buf));
- if (l < 0) {
-
- if (errno == EINTR)
- continue;
-
- if (errno == EAGAIN)
- return 0;
-
- return -errno;
- } else if (l == 0)
- return 0;
- }
-}
-
-int acquire_terminal(
- const char *name,
- bool fail,
- bool force,
- bool ignore_tiocstty_eperm,
- usec_t timeout) {
-
- int fd = -1, notify = -1, r = 0, wd = -1;
- usec_t ts = 0;
-
- assert(name);
+ static const struct table iec[] = {
+ { "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 },
+ { "B", 1 },
+ { "", 1 },
+ };
- /* 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.) */
+ static const struct table si[] = {
+ { "E", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL*1000ULL },
+ { "P", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL },
+ { "T", 1000ULL*1000ULL*1000ULL*1000ULL },
+ { "G", 1000ULL*1000ULL*1000ULL },
+ { "M", 1000ULL*1000ULL },
+ { "K", 1000ULL },
+ { "B", 1 },
+ { "", 1 },
+ };
- if (timeout != USEC_INFINITY)
- ts = now(CLOCK_MONOTONIC);
+ const struct table *table;
+ const char *p;
+ unsigned long long r = 0;
+ unsigned n_entries, start_pos = 0;
- if (!fail && !force) {
- notify = inotify_init1(IN_CLOEXEC | (timeout != USEC_INFINITY ? IN_NONBLOCK : 0));
- if (notify < 0) {
- r = -errno;
- goto fail;
- }
+ assert(t);
+ assert(base == 1000 || base == 1024);
+ assert(size);
- wd = inotify_add_watch(notify, name, IN_CLOSE);
- if (wd < 0) {
- r = -errno;
- goto fail;
- }
+ if (base == 1000) {
+ table = si;
+ n_entries = ELEMENTSOF(si);
+ } else {
+ table = iec;
+ n_entries = ELEMENTSOF(iec);
}
- for (;;) {
- struct sigaction sa_old, sa_new = {
- .sa_handler = SIG_IGN,
- .sa_flags = SA_RESTART,
- };
-
- if (notify >= 0) {
- r = flush_fd(notify);
- if (r < 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 */
- fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
- if (fd < 0)
- return fd;
-
- /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed
- * if we already own the tty. */
- assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0);
-
- /* First, try to get the tty */
- if (ioctl(fd, TIOCSCTTY, force) < 0)
- r = -errno;
-
- assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0);
-
- /* Sometimes it makes sense to ignore TIOCSCTTY
- * returning EPERM, i.e. when very likely we already
- * are have this controlling terminal. */
- if (r < 0 && r == -EPERM && ignore_tiocstty_eperm)
- r = 0;
-
- if (r < 0 && (force || fail || r != -EPERM)) {
- goto fail;
- }
-
- if (r >= 0)
- break;
-
- assert(!fail);
- assert(!force);
- assert(notify >= 0);
+ p = t;
+ do {
+ long long l;
+ unsigned long long l2;
+ double frac = 0;
+ char *e;
+ unsigned i;
- for (;;) {
- union inotify_event_buffer buffer;
- struct inotify_event *e;
- ssize_t l;
+ errno = 0;
+ l = strtoll(p, &e, 10);
- if (timeout != USEC_INFINITY) {
- usec_t n;
+ if (errno > 0)
+ return -errno;
- n = now(CLOCK_MONOTONIC);
- if (ts + timeout < n) {
- r = -ETIMEDOUT;
- goto fail;
- }
+ if (l < 0)
+ return -ERANGE;
- r = fd_wait_for_event(fd, POLLIN, ts + timeout - n);
- if (r < 0)
- goto fail;
+ if (e == p)
+ return -EINVAL;
- if (r == 0) {
- r = -ETIMEDOUT;
- goto fail;
- }
- }
+ if (*e == '.') {
+ e++;
+ if (*e >= '0' && *e <= '9') {
+ char *e2;
- l = read(notify, &buffer, sizeof(buffer));
- if (l < 0) {
- if (errno == EINTR || errno == EAGAIN)
- continue;
+ /* strotoull itself would accept space/+/- */
+ l2 = strtoull(e, &e2, 10);
- r = -errno;
- goto fail;
- }
+ if (errno == ERANGE)
+ return -errno;
- FOREACH_INOTIFY_EVENT(e, buffer, l) {
- if (e->wd != wd || !(e->mask & IN_CLOSE)) {
- r = -EIO;
- goto fail;
- }
+ /* Ignore failure. E.g. 10.M is valid */
+ frac = l2;
+ for (; e < e2; e++)
+ frac /= 10;
}
-
- 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. */
- fd = safe_close(fd);
- }
-
- safe_close(notify);
-
- r = reset_terminal_fd(fd, true);
- if (r < 0)
- log_warning_errno(r, "Failed to reset terminal: %m");
-
- return fd;
-
-fail:
- safe_close(fd);
- safe_close(notify);
-
- return r;
-}
-
-int release_terminal(void) {
- static const struct sigaction sa_new = {
- .sa_handler = SIG_IGN,
- .sa_flags = SA_RESTART,
- };
-
- _cleanup_close_ int fd = -1;
- struct sigaction sa_old;
- int r = 0;
-
- fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC);
- if (fd < 0)
- return -errno;
-
- /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed
- * by our own TIOCNOTTY */
- assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0);
-
- if (ioctl(fd, TIOCNOTTY) < 0)
- r = -errno;
+ e += strspn(e, WHITESPACE);
- assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0);
+ for (i = start_pos; i < n_entries; i++)
+ if (startswith(e, table[i].suffix)) {
+ unsigned long long tmp;
+ if ((unsigned long long) l + (frac > 0) > ULLONG_MAX / table[i].factor)
+ return -ERANGE;
+ tmp = l * table[i].factor + (unsigned long long) (frac * table[i].factor);
+ if (tmp > ULLONG_MAX - r)
+ return -ERANGE;
- return r;
-}
+ r += tmp;
+ if ((unsigned long long) (off_t) r != r)
+ return -ERANGE;
-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 = {
- .sa_handler = SIG_IGN,
- .sa_flags = SA_RESTART,
- };
- va_list ap;
- int r = 0;
-
- 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 = {
- .sa_handler = SIG_DFL,
- .sa_flags = SA_RESTART,
- };
- va_list ap;
- int r = 0;
-
- 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;
-}
-
-void safe_close_pair(int p[]) {
- assert(p);
-
- if (p[0] == p[1]) {
- /* Special case pairs which use the same fd in both
- * directions... */
- p[0] = p[1] = safe_close(p[0]);
- return;
- }
-
- p[0] = safe_close(p[0]);
- p[1] = safe_close(p[1]);
-}
-
-ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) {
- uint8_t *p = buf;
- ssize_t n = 0;
-
- assert(fd >= 0);
- assert(buf);
-
- while (nbytes > 0) {
- ssize_t k;
-
- k = read(fd, p, nbytes);
- if (k < 0) {
- if (errno == EINTR)
- continue;
-
- if (errno == EAGAIN && do_poll) {
-
- /* We knowingly ignore any return value here,
- * and expect that any error/EOF is reported
- * via read() */
-
- fd_wait_for_event(fd, POLLIN, USEC_INFINITY);
- continue;
- }
-
- return n > 0 ? n : -errno;
- }
-
- if (k == 0)
- return n;
-
- p += k;
- nbytes -= k;
- n += k;
- }
-
- return n;
-}
-
-int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) {
- const uint8_t *p = buf;
-
- assert(fd >= 0);
- assert(buf);
-
- errno = 0;
-
- while (nbytes > 0) {
- ssize_t k;
-
- k = write(fd, p, nbytes);
- if (k < 0) {
- if (errno == EINTR)
- continue;
-
- if (errno == EAGAIN && do_poll) {
- /* We knowingly ignore any return value here,
- * and expect that any error/EOF is reported
- * via write() */
-
- fd_wait_for_event(fd, POLLOUT, USEC_INFINITY);
- continue;
- }
-
- return -errno;
- }
-
- if (k == 0) /* Can't really happen */
- return -EIO;
-
- p += k;
- nbytes -= k;
- }
-
- return 0;
-}
-
-int parse_size(const char *t, off_t base, off_t *size) {
-
- /* Soo, sometimes we want to parse IEC binary suffxies, and
- * sometimes SI decimal suffixes. This function can parse
- * both. Which one is the right way depends on the
- * context. Wikipedia suggests that SI is customary for
- * hardrware metrics and network speeds, while IEC is
- * customary for most data sizes used by software and volatile
- * (RAM) memory. Hence be careful which one you pick!
- *
- * In either case we use just K, M, G as suffix, and not Ki,
- * Mi, Gi or so (as IEC would suggest). That's because that's
- * frickin' ugly. But this means you really need to make sure
- * to document which base you are parsing when you use this
- * call. */
-
- struct table {
- const char *suffix;
- unsigned long long factor;
- };
-
- static const struct table iec[] = {
- { "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 },
- { "B", 1 },
- { "", 1 },
- };
-
- static const struct table si[] = {
- { "E", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL*1000ULL },
- { "P", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL },
- { "T", 1000ULL*1000ULL*1000ULL*1000ULL },
- { "G", 1000ULL*1000ULL*1000ULL },
- { "M", 1000ULL*1000ULL },
- { "K", 1000ULL },
- { "B", 1 },
- { "", 1 },
- };
-
- const struct table *table;
- const char *p;
- unsigned long long r = 0;
- unsigned n_entries, start_pos = 0;
-
- assert(t);
- assert(base == 1000 || base == 1024);
- assert(size);
-
- if (base == 1000) {
- table = si;
- n_entries = ELEMENTSOF(si);
- } else {
- table = iec;
- n_entries = ELEMENTSOF(iec);
- }
-
- p = t;
- do {
- long long l;
- unsigned long long l2;
- double frac = 0;
- 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;
-
- if (*e == '.') {
- e++;
- if (*e >= '0' && *e <= '9') {
- char *e2;
-
- /* strotoull itself would accept space/+/- */
- l2 = strtoull(e, &e2, 10);
-
- if (errno == ERANGE)
- return -errno;
-
- /* Ignore failure. E.g. 10.M is valid */
- frac = l2;
- for (; e < e2; e++)
- frac /= 10;
- }
- }
-
- e += strspn(e, WHITESPACE);
-
- for (i = start_pos; i < n_entries; i++)
- if (startswith(e, table[i].suffix)) {
- unsigned long long tmp;
- if ((unsigned long long) l + (frac > 0) > ULLONG_MAX / table[i].factor)
- return -ERANGE;
- tmp = l * table[i].factor + (unsigned long long) (frac * table[i].factor);
- if (tmp > ULLONG_MAX - r)
- return -ERANGE;
-
- r += tmp;
- if ((unsigned long long) (off_t) r != r)
- return -ERANGE;
-
- p = e + strlen(table[i].suffix);
+ p = e + strlen(table[i].suffix);
start_pos = i + 1;
break;
- }
-
- if (i >= n_entries)
- return -EINVAL;
-
- } while (*p);
-
- *size = 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)
- safe_close(fd);
-
- if (r < 0 || s < 0 || t < 0)
- return -errno;
-
- /* Explicitly unset O_CLOEXEC, since if fd was < 3, then
- * dup2() was a NOP and the bit hence possibly set. */
- 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;
-
- null_fd = open("/dev/null", O_RDWR|O_NOCTTY);
- if (null_fd < 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) {
- _cleanup_closedir_ DIR *d;
-
- d = opendir(path);
- if (!d)
- return -errno;
-
- for (;;) {
- struct dirent *de;
-
- errno = 0;
- de = readdir(d);
- if (!de && errno != 0)
- return -errno;
-
- if (!de)
- return 1;
-
- if (!hidden_file(de->d_name))
- return 0;
- }
-}
-
-char* dirname_malloc(const char *path) {
- char *d, *dir, *dir2;
-
- d = strdup(path);
- if (!d)
- return NULL;
- dir = dirname(d);
- assert(dir);
-
- if (dir != d) {
- dir2 = strdup(dir);
- free(d);
- return dir2;
- }
-
- return dir;
-}
-
-int dev_urandom(void *p, size_t n) {
- static int have_syscall = -1;
- int r, fd;
- ssize_t k;
-
- /* Gathers some randomness from the kernel. This call will
- * never block, and will always return some data from the
- * kernel, regardless if the random pool is fully initialized
- * or not. It thus makes no guarantee for the quality of the
- * returned entropy, but is good enough for or usual usecases
- * of seeding the hash functions for hashtable */
-
- /* Use the getrandom() syscall unless we know we don't have
- * it, or when the requested size is too large for it. */
- if (have_syscall != 0 || (size_t) (int) n != n) {
- r = getrandom(p, n, GRND_NONBLOCK);
- if (r == (int) n) {
- have_syscall = true;
- return 0;
- }
-
- if (r < 0) {
- if (errno == ENOSYS)
- /* we lack the syscall, continue with
- * reading from /dev/urandom */
- have_syscall = false;
- else if (errno == EAGAIN)
- /* not enough entropy for now. Let's
- * remember to use the syscall the
- * next time, again, but also read
- * from /dev/urandom for now, which
- * doesn't care about the current
- * amount of entropy. */
- have_syscall = true;
- else
- return -errno;
- } else
- /* too short read? */
- return -EIO;
- }
-
- fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY);
- if (fd < 0)
- return errno == ENOENT ? -ENOSYS : -errno;
-
- k = loop_read(fd, p, n, true);
- safe_close(fd);
-
- if (k < 0)
- return (int) k;
- if ((size_t) k != n)
- return -EIO;
-
- return 0;
-}
-
-void initialize_srand(void) {
- static bool srand_called = false;
- unsigned x;
-#ifdef HAVE_SYS_AUXV_H
- void *auxv;
-#endif
-
- if (srand_called)
- return;
-
- x = 0;
-
-#ifdef HAVE_SYS_AUXV_H
- /* The kernel provides us with a bit of entropy in auxv, so
- * let's try to make use of that to seed the pseudo-random
- * generator. It's better than nothing... */
-
- auxv = (void*) getauxval(AT_RANDOM);
- if (auxv)
- x ^= *(unsigned*) auxv;
-#endif
-
- x ^= (unsigned) now(CLOCK_REALTIME);
- x ^= (unsigned) gettid();
-
- srand(x);
- srand_called = true;
-}
-
-void random_bytes(void *p, size_t n) {
- uint8_t *q;
- int r;
-
- r = dev_urandom(p, n);
- if (r >= 0)
- return;
-
- /* If some idiot made /dev/urandom unavailable to us, he'll
- * get a PRNG instead. */
-
- initialize_srand();
-
- for (q = p; q < (uint8_t*) p + n; q ++)
- *q = rand();
-}
-
-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;
-
- memzero(saved_argv[i], 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);
-}
-
-int sigprocmask_many(int how, ...) {
- va_list ap;
- sigset_t ss;
- int sig;
-
- assert_se(sigemptyset(&ss) == 0);
-
- va_start(ap, how);
- while ((sig = va_arg(ap, int)) > 0)
- assert_se(sigaddset(&ss, sig) == 0);
- va_end(ap);
-
- if (sigprocmask(how, &ss, NULL) < 0)
- return -errno;
-
- return 0;
-}
-
-char* gethostname_malloc(void) {
- struct utsname u;
-
- assert_se(uname(&u) >= 0);
-
- if (!isempty(u.nodename) && !streq(u.nodename, "(none)"))
- return strdup(u.nodename);
-
- return strdup(u.sysname);
-}
-
-bool hostname_is_set(void) {
- struct utsname u;
-
- assert_se(uname(&u) >= 0);
-
- return !isempty(u.nodename) && !streq(u.nodename, "(none)");
-}
-
-char *lookup_uid(uid_t uid) {
- long bufsize;
- char *name;
- _cleanup_free_ char *buf = NULL;
- struct passwd pwbuf, *pw = NULL;
-
- /* Shortcut things to avoid NSS lookups */
- if (uid == 0)
- return strdup("root");
-
- bufsize = sysconf(_SC_GETPW_R_SIZE_MAX);
- if (bufsize <= 0)
- bufsize = 4096;
-
- buf = malloc(bufsize);
- if (!buf)
- return NULL;
-
- if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw)
- return strdup(pw->pw_name);
-
- if (asprintf(&name, UID_FMT, uid) < 0)
- return NULL;
-
- return name;
-}
-
-char* getlogname_malloc(void) {
- uid_t uid;
- struct stat st;
-
- if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0)
- uid = st.st_uid;
- else
- uid = getuid();
-
- return lookup_uid(uid);
-}
-
-char *getusername_malloc(void) {
- const char *e;
-
- e = getenv("USER");
- if (e)
- return strdup(e);
-
- return lookup_uid(getuid());
-}
-
-int getttyname_malloc(int fd, char **ret) {
- size_t l = 100;
- int r;
-
- assert(fd >= 0);
- assert(ret);
-
- for (;;) {
- char path[l];
-
- r = ttyname_r(fd, path, sizeof(path));
- if (r == 0) {
- const char *p;
- char *c;
-
- p = startswith(path, "/dev/");
- c = strdup(p ?: path);
- if (!c)
- return -ENOMEM;
-
- *ret = c;
- return 0;
- }
-
- if (r != ERANGE)
- return -r;
-
- l *= 2;
- }
-
- return 0;
-}
-
-int getttyname_harder(int fd, char **r) {
- int k;
- char *s;
-
- k = getttyname_malloc(fd, &s);
- if (k < 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 r;
- _cleanup_free_ char *line = NULL;
- const char *p;
- unsigned long ttynr;
-
- assert(pid >= 0);
-
- p = procfs_file_alloca(pid, "stat");
- r = read_one_line_file(p, &line);
- if (r < 0)
- return r;
-
- 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;
-
- if (major(ttynr) == 0 && minor(ttynr) == 0)
- return -ENOENT;
-
- if (d)
- *d = (dev_t) ttynr;
-
- return 0;
-}
-
-int get_ctty(pid_t pid, dev_t *_devnr, char **r) {
- char fn[sizeof("/dev/char/")-1 + 2*DECIMAL_STR_MAX(unsigned) + 1 + 1], *b = NULL;
- _cleanup_free_ char *s = NULL;
- const char *p;
- dev_t devnr;
- int k;
-
- assert(r);
-
- k = get_ctty_devnr(pid, &devnr);
- if (k < 0)
- return k;
-
- sprintf(fn, "/dev/char/%u:%u", major(devnr), minor(devnr));
-
- k = readlink_malloc(fn, &s);
- if (k < 0) {
-
- if (k != -ENOENT)
- return k;
-
- /* This is an ugly hack */
- if (major(devnr) == 136) {
- asprintf(&b, "pts/%u", minor(devnr));
- goto finish;
- }
-
- /* Probably something like the ptys which have no
- * symlink in /dev/char. Let's return something
- * vaguely useful. */
-
- b = strdup(fn + 5);
- goto finish;
- }
-
- if (startswith(s, "/dev/"))
- p = s + 5;
- else if (startswith(s, "../"))
- p = s + 3;
- else
- p = s;
-
- b = strdup(p);
-
-finish:
- if (!b)
- return -ENOMEM;
-
- *r = b;
- if (_devnr)
- *_devnr = devnr;
-
- return 0;
-}
-
-int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) {
- _cleanup_closedir_ DIR *d = NULL;
- int ret = 0;
-
- assert(fd >= 0);
-
- /* This returns the first error we run into, but nevertheless
- * tries to go on. This closes the passed fd. */
-
- d = fdopendir(fd);
- if (!d) {
- safe_close(fd);
-
- return errno == ENOENT ? 0 : -errno;
- }
-
- for (;;) {
- struct dirent *de;
- bool is_dir, keep_around;
- struct stat st;
- int r;
-
- errno = 0;
- de = readdir(d);
- if (!de) {
- if (errno != 0 && ret == 0)
- ret = -errno;
- return ret;
- }
-
- if (streq(de->d_name, ".") || streq(de->d_name, ".."))
- continue;
-
- if (de->d_type == DT_UNKNOWN ||
- honour_sticky ||
- (de->d_type == DT_DIR && root_dev)) {
- if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
- if (ret == 0 && errno != ENOENT)
- ret = -errno;
- continue;
- }
-
- is_dir = S_ISDIR(st.st_mode);
- keep_around =
- honour_sticky &&
- (st.st_uid == 0 || st.st_uid == getuid()) &&
- (st.st_mode & S_ISVTX);
- } else {
- is_dir = de->d_type == DT_DIR;
- keep_around = false;
- }
-
- if (is_dir) {
- int subdir_fd;
-
- /* if root_dev is set, remove subdirectories only, if device is same as dir */
- if (root_dev && st.st_dev != root_dev->st_dev)
- continue;
-
- subdir_fd = openat(fd, de->d_name,
- O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME);
- if (subdir_fd < 0) {
- if (ret == 0 && errno != ENOENT)
- ret = -errno;
- continue;
- }
-
- r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev);
- if (r < 0 && 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;
- }
- }
- }
-}
-
-_pure_ static int is_temporary_fs(struct statfs *s) {
- assert(s);
-
- return F_TYPE_EQUAL(s->f_type, TMPFS_MAGIC) ||
- F_TYPE_EQUAL(s->f_type, RAMFS_MAGIC);
-}
-
-int is_fd_on_temporary_fs(int fd) {
- struct statfs s;
-
- if (fstatfs(fd, &s) < 0)
- return -errno;
-
- return is_temporary_fs(&s);
-}
-
-int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) {
- struct statfs s;
-
- assert(fd >= 0);
-
- if (fstatfs(fd, &s) < 0) {
- safe_close(fd);
- return -errno;
- }
-
- /* We refuse to clean disk file systems with this call. This
- * is extra paranoia just to be sure we never ever remove
- * non-state data */
- if (!is_temporary_fs(&s)) {
- log_error("Attempted to remove disk file system, and we can't allow that.");
- safe_close(fd);
- return -EPERM;
- }
-
- return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev);
-}
-
-static 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 int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) {
- int fd, r;
- struct statfs s;
-
- assert(path);
-
- /* We refuse to clean the root file system with this
- * call. This is extra paranoia to never cause a really
- * seriously broken system. */
- if (path_equal(path, "/")) {
- log_error("Attempted to remove entire root file system, and we can't allow that.");
- return -EPERM;
- }
-
- fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME);
- if (fd < 0) {
-
- if (errno != ENOTDIR && errno != ELOOP)
- return -errno;
-
- if (!dangerous) {
- if (statfs(path, &s) < 0)
- return -errno;
-
- if (!is_temporary_fs(&s)) {
- log_error("Attempted to remove disk file system, and we can't allow that.");
- return -EPERM;
- }
- }
-
- if (delete_root && !only_dirs)
- if (unlink(path) < 0 && errno != ENOENT)
- return -errno;
-
- return 0;
- }
-
- if (!dangerous) {
- if (fstatfs(fd, &s) < 0) {
- safe_close(fd);
- return -errno;
- }
-
- if (!is_temporary_fs(&s)) {
- log_error("Attempted to remove disk file system, and we can't allow that.");
- safe_close(fd);
- return -EPERM;
- }
- }
-
- r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL);
- 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 rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) {
- return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false);
-}
-
-int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) {
- return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true);
-}
-
-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_INVALID)
- if (chmod(path, mode) < 0)
- return -errno;
-
- if (uid != UID_INVALID || gid != GID_INVALID)
- 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 (i >= n_entries)
+ return -EINVAL;
- if (mode != MODE_INVALID)
- if (fchmod(fd, mode) < 0)
- return -errno;
+ } while (*p);
- if (uid != UID_INVALID || gid != GID_INVALID)
- if (fchown(fd, uid, gid) < 0)
- return -errno;
+ *size = r;
return 0;
}
-cpu_set_t* cpu_set_malloc(unsigned *ncpus) {
- cpu_set_t *r;
- unsigned n = 1024;
+bool is_device_path(const char *path) {
- /* Allocates the cpuset in the right size */
+ /* Returns true on paths that refer to a device, either in
+ * sysfs or in /dev */
- for (;;) {
- if (!(r = CPU_ALLOC(n)))
- return NULL;
+ return
+ path_startswith(path, "/dev/") ||
+ path_startswith(path, "/sys/");
+}
- if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) {
- CPU_ZERO_S(CPU_ALLOC_SIZE(n), r);
+int dir_is_empty(const char *path) {
+ _cleanup_closedir_ DIR *d;
- if (ncpus)
- *ncpus = n;
+ d = opendir(path);
+ if (!d)
+ return -errno;
- return r;
- }
+ for (;;) {
+ struct dirent *de;
- CPU_FREE(r);
+ errno = 0;
+ de = readdir(d);
+ if (!de && errno != 0)
+ return -errno;
- if (errno != EINVAL)
- return NULL;
+ if (!de)
+ return 1;
- n *= 2;
+ if (!hidden_file(de->d_name))
+ return 0;
}
}
-int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) {
- static const char status_indent[] = " "; /* "[" STATUS "] " */
- _cleanup_free_ char *s = NULL;
- _cleanup_close_ int fd = -1;
- struct iovec iovec[6] = {};
- int n = 0;
- static bool prev_ephemeral;
+char* dirname_malloc(const char *path) {
+ char *d, *dir, *dir2;
- assert(format);
+ d = strdup(path);
+ if (!d)
+ return NULL;
+ dir = dirname(d);
+ assert(dir);
- /* This is independent of logging, as status messages are
- * optional and go exclusively to the console. */
+ if (dir != d) {
+ dir2 = strdup(dir);
+ free(d);
+ return dir2;
+ }
- if (vasprintf(&s, format, ap) < 0)
- return log_oom();
+ return dir;
+}
- fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
- if (fd < 0)
- return fd;
+void rename_process(const char name[8]) {
+ assert(name);
- if (ellipse) {
- char *e;
- size_t emax, sl;
- int c;
+ /* 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 */
- c = fd_columns(fd);
- if (c <= 0)
- c = 80;
+ prctl(PR_SET_NAME, name);
- sl = status ? sizeof(status_indent)-1 : 0;
+ if (program_invocation_name)
+ strncpy(program_invocation_name, name, strlen(program_invocation_name));
- emax = c - sl - 1;
- if (emax < 3)
- emax = 3;
+ if (saved_argc > 0) {
+ int i;
- e = ellipsize(s, emax, 50);
- if (e) {
- free(s);
- s = e;
- }
- }
+ if (saved_argv[0])
+ strncpy(saved_argv[0], name, strlen(saved_argv[0]));
- if (prev_ephemeral)
- IOVEC_SET_STRING(iovec[n++], "\r" ANSI_ERASE_TO_END_OF_LINE);
- prev_ephemeral = ephemeral;
+ for (i = 1; i < saved_argc; i++) {
+ if (!saved_argv[i])
+ break;
- if (status) {
- if (!isempty(status)) {
- IOVEC_SET_STRING(iovec[n++], "[");
- IOVEC_SET_STRING(iovec[n++], status);
- IOVEC_SET_STRING(iovec[n++], "] ");
- } else
- IOVEC_SET_STRING(iovec[n++], status_indent);
+ memzero(saved_argv[i], strlen(saved_argv[i]));
+ }
}
-
- IOVEC_SET_STRING(iovec[n++], s);
- if (!ephemeral)
- IOVEC_SET_STRING(iovec[n++], "\n");
-
- if (writev(fd, iovec, n) < 0)
- return -errno;
-
- return 0;
}
-int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) {
+void sigset_add_many(sigset_t *ss, ...) {
va_list ap;
- int r;
+ int sig;
- assert(format);
+ assert(ss);
- va_start(ap, format);
- r = status_vprintf(status, ellipse, ephemeral, format, ap);
+ va_start(ap, ss);
+ while ((sig = va_arg(ap, int)) > 0)
+ assert_se(sigaddset(ss, sig) == 0);
va_end(ap);
-
- return r;
}
-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 == '$')
- state = CURLY;
- break;
+int sigprocmask_many(int how, ...) {
+ va_list ap;
+ sigset_t ss;
+ int sig;
- case CURLY:
- if (*e == '{') {
- k = strnappend(r, word, e-word-1);
- if (!k)
- goto fail;
+ assert_se(sigemptyset(&ss) == 0);
- free(r);
- r = k;
+ va_start(ap, how);
+ while ((sig = va_arg(ap, int)) > 0)
+ assert_se(sigaddset(&ss, sig) == 0);
+ va_end(ap);
- word = e-1;
- state = VARIABLE;
+ if (sigprocmask(how, &ss, NULL) < 0)
+ return -errno;
- } else if (*e == '$') {
- k = strnappend(r, word, e-word);
- if (!k)
- goto fail;
+ return 0;
+}
- free(r);
- r = k;
+char* gethostname_malloc(void) {
+ struct utsname u;
- word = e+1;
- state = WORD;
- } else
- state = WORD;
- break;
+ assert_se(uname(&u) >= 0);
- case VARIABLE:
- if (*e == '}') {
- const char *t;
+ if (!isempty(u.nodename) && !streq(u.nodename, "(none)"))
+ return strdup(u.nodename);
- t = strempty(strv_env_get_n(env, word+2, e-word-2));
+ return strdup(u.sysname);
+}
- k = strappend(r, t);
- if (!k)
- goto fail;
+bool hostname_is_set(void) {
+ struct utsname u;
- free(r);
- r = k;
+ assert_se(uname(&u) >= 0);
- word = e+1;
- state = WORD;
- }
- break;
- }
- }
+ return !isempty(u.nodename) && !streq(u.nodename, "(none)");
+}
- k = strnappend(r, word, e-word);
- if (!k)
- goto fail;
+char *lookup_uid(uid_t uid) {
+ long bufsize;
+ char *name;
+ _cleanup_free_ char *buf = NULL;
+ struct passwd pwbuf, *pw = NULL;
- free(r);
- return k;
+ /* Shortcut things to avoid NSS lookups */
+ if (uid == 0)
+ return strdup("root");
-fail:
- free(r);
- return NULL;
-}
+ bufsize = sysconf(_SC_GETPW_R_SIZE_MAX);
+ if (bufsize <= 0)
+ bufsize = 4096;
-char **replace_env_argv(char **argv, char **env) {
- char **ret, **i;
- unsigned k = 0, l = 0;
+ buf = malloc(bufsize);
+ if (!buf)
+ return NULL;
- l = strv_length(argv);
+ if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw)
+ return strdup(pw->pw_name);
- ret = new(char*, l+1);
- if (!ret)
+ if (asprintf(&name, UID_FMT, uid) < 0)
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;
+ return name;
+}
- e = strv_env_get(env, *i+1);
- if (e) {
- int r;
+char* getlogname_malloc(void) {
+ uid_t uid;
+ struct stat st;
- r = strv_split_quoted(&m, e, true);
- if (r < 0) {
- ret[k] = NULL;
- strv_free(ret);
- return NULL;
- }
- } else
- m = NULL;
+ if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0)
+ uid = st.st_uid;
+ else
+ uid = getuid();
- q = strv_length(m);
- l = l + q - 1;
+ return lookup_uid(uid);
+}
- w = realloc(ret, sizeof(char*) * (l+1));
- if (!w) {
- ret[k] = NULL;
- strv_free(ret);
- strv_free(m);
- return NULL;
- }
+char *getusername_malloc(void) {
+ const char *e;
- ret = w;
- if (m) {
- memcpy(ret + k, m, q * sizeof(char*));
- free(m);
- }
+ e = getenv("USER");
+ if (e)
+ return strdup(e);
- k += q;
- continue;
- }
+ return lookup_uid(getuid());
+}
- /* If ${FOO} appears as part of a word, replace it by the variable as-is */
- ret[k] = replace_env(*i, env);
- if (!ret[k]) {
- strv_free(ret);
- return NULL;
- }
- k++;
- }
+bool is_temporary_fs(const struct statfs *s) {
+ assert(s);
- ret[k] = NULL;
- return ret;
+ return F_TYPE_EQUAL(s->f_type, TMPFS_MAGIC) ||
+ F_TYPE_EQUAL(s->f_type, RAMFS_MAGIC);
}
-int fd_columns(int fd) {
- struct winsize ws = {};
+int fd_is_temporary_fs(int fd) {
+ struct statfs s;
- if (ioctl(fd, TIOCGWINSZ, &ws) < 0)
+ if (fstatfs(fd, &s) < 0)
return -errno;
- if (ws.ws_col <= 0)
- return -EIO;
-
- return ws.ws_col;
+ return is_temporary_fs(&s);
}
-unsigned columns(void) {
- const char *e;
- int c;
-
- if (_likely_(cached_columns > 0))
- return cached_columns;
+int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) {
+ assert(path);
- c = 0;
- e = getenv("COLUMNS");
- if (e)
- (void) safe_atoi(e, &c);
+ /* 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 (c <= 0)
- c = fd_columns(STDOUT_FILENO);
+ if (mode != MODE_INVALID)
+ if (chmod(path, mode) < 0)
+ return -errno;
- if (c <= 0)
- c = 80;
+ if (uid != UID_INVALID || gid != GID_INVALID)
+ if (chown(path, uid, gid) < 0)
+ return -errno;
- cached_columns = c;
- return cached_columns;
+ return 0;
}
-int fd_lines(int fd) {
- struct winsize ws = {};
+int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) {
+ assert(fd >= 0);
- if (ioctl(fd, TIOCGWINSZ, &ws) < 0)
- return -errno;
+ /* 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 (ws.ws_row <= 0)
- return -EIO;
+ if (mode != MODE_INVALID)
+ if (fchmod(fd, mode) < 0)
+ return -errno;
- return ws.ws_row;
-}
+ if (uid != UID_INVALID || gid != GID_INVALID)
+ if (fchown(fd, uid, gid) < 0)
+ return -errno;
-unsigned lines(void) {
- const char *e;
- int l;
+ return 0;
+}
- if (_likely_(cached_lines > 0))
- return cached_lines;
+cpu_set_t* cpu_set_malloc(unsigned *ncpus) {
+ cpu_set_t *r;
+ unsigned n = 1024;
- l = 0;
- e = getenv("LINES");
- if (e)
- (void) safe_atoi(e, &l);
+ /* Allocates the cpuset in the right size */
- if (l <= 0)
- l = fd_lines(STDOUT_FILENO);
+ for (;;) {
+ if (!(r = CPU_ALLOC(n)))
+ return NULL;
- if (l <= 0)
- l = 24;
+ if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) {
+ CPU_ZERO_S(CPU_ALLOC_SIZE(n), r);
- cached_lines = l;
- return cached_lines;
-}
+ if (ncpus)
+ *ncpus = n;
-/* intended to be used as a SIGWINCH sighandler */
-void columns_lines_cache_reset(int signum) {
- cached_columns = 0;
- cached_lines = 0;
-}
+ return r;
+ }
-bool on_tty(void) {
- static int cached_on_tty = -1;
+ CPU_FREE(r);
- if (_unlikely_(cached_on_tty < 0))
- cached_on_tty = isatty(STDOUT_FILENO) > 0;
+ if (errno != EINVAL)
+ return NULL;
- return cached_on_tty;
+ n *= 2;
+ }
}
int files_same(const char *filea, const char *fileb) {
return touch_file(path, false, USEC_INFINITY, UID_INVALID, GID_INVALID, 0);
}
-char *unquote(const char *s, const char* quotes) {
+static char *unquote(const char *s, const char* quotes) {
size_t l;
assert(s);
/* This is rather stupid, simply removes the heading and
* trailing quotes if there is one. Doesn't care about
- * escaping or anything. We should make this smarter one
- * day... */
+ * escaping or anything.
+ *
+ * DON'T USE THIS FOR NEW CODE ANYMORE!*/
l = strlen(s);
if (l < 2)
return strdup(s);
}
-char *normalize_env_assignment(const char *s) {
- _cleanup_free_ char *value = NULL;
- const char *eq;
- char *p, *name;
-
- eq = strchr(s, '=');
- if (!eq) {
- char *r, *t;
-
- r = strdup(s);
- if (!r)
- return NULL;
-
- t = strstrip(r);
- if (t != r)
- memmove(r, t, strlen(t) + 1);
-
- return r;
- }
-
- name = strndupa(s, eq - s);
- p = strdupa(eq + 1);
-
- value = unquote(strstrip(p), QUOTES);
- if (!value)
- return NULL;
-
- return strjoin(strstrip(name), "=", value, NULL);
-}
-
-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;
- }
-}
-
-/*
- * Return values:
- * < 0 : wait_for_terminate() failed to get the state of the
- * process, the process was terminated by a signal, or
- * failed for an unknown reason.
- * >=0 : The process terminated normally, and its exit code is
- * returned.
- *
- * That is, success is indicated by a return value of zero, and an
- * error is indicated by a non-zero value.
- *
- * A warning is emitted if the process terminates abnormally,
- * and also if it returns non-zero unless check_exit_code is true.
- */
-int wait_for_terminate_and_warn(const char *name, pid_t pid, bool check_exit_code) {
- int r;
- siginfo_t status;
-
- assert(name);
- assert(pid > 1);
-
- r = wait_for_terminate(pid, &status);
- if (r < 0)
- return log_warning_errno(r, "Failed to wait for %s: %m", name);
-
- if (status.si_code == CLD_EXITED) {
- if (status.si_status != 0)
- log_full(check_exit_code ? LOG_WARNING : LOG_DEBUG,
- "%s failed with error code %i.", name, status.si_status);
- else
- log_debug("%s succeeded.", name);
-
- return status.si_status;
- } 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 */
_cleanup_free_ char *t = NULL, *u = NULL;
size_t enc_len;
- u = unquote(tagvalue, "\"\'");
+ u = unquote(tagvalue, QUOTES);
if (!u)
return NULL;
return strdup(p);
}
-bool tty_is_vc(const char *tty) {
- assert(tty);
-
- return vtnr_from_tty(tty) >= 0;
-}
-
-bool tty_is_console(const char *tty) {
- assert(tty);
-
- if (startswith(tty, "/dev/"))
- tty += 5;
-
- return streq(tty, "console");
-}
-
-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;
-}
-
-char *resolve_dev_console(char **active) {
- char *tty;
-
- /* Resolve where /dev/console is pointing to, if /sys is actually ours
- * (i.e. not read-only-mounted which is a sign for container setups) */
-
- if (path_is_read_only_fs("/sys") > 0)
- return NULL;
-
- if (read_one_line_file("/sys/class/tty/console/active", active) < 0)
- return NULL;
-
- /* If multiple log outputs are configured the last one is what
- * /dev/console points to */
- tty = strrchr(*active, ' ');
- if (tty)
- tty++;
- else
- tty = *active;
-
- if (streq(tty, "tty0")) {
- char *tmp;
-
- /* Get the active VC (e.g. tty1) */
- if (read_one_line_file("/sys/class/tty/tty0/active", &tmp) >= 0) {
- free(*active);
- tty = *active = tmp;
- }
- }
-
- return tty;
-}
-
-bool tty_is_vc_resolve(const char *tty) {
- _cleanup_free_ char *active = NULL;
-
- assert(tty);
-
- if (startswith(tty, "/dev/"))
- tty += 5;
-
- if (streq(tty, "console")) {
- tty = resolve_dev_console(&active);
- if (!tty)
- return false;
- }
-
- return tty_is_vc(tty);
-}
-
-const char *default_term_for_tty(const char *tty) {
- assert(tty);
-
- return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt220";
-}
-
bool dirent_is_file(const struct dirent *de) {
assert(de);
return endswith(de->d_name, suffix);
}
-void execute_directory(const char *directory, DIR *d, usec_t timeout, char *argv[]) {
- pid_t executor_pid;
- int r;
-
- assert(directory);
+static int do_execute(char **directories, usec_t timeout, char *argv[]) {
+ _cleanup_hashmap_free_free_ Hashmap *pids = NULL;
+ _cleanup_set_free_free_ Set *seen = NULL;
+ char **directory;
- /* Executes all binaries in a directory in parallel and waits
- * for them to finish. Optionally a timeout is applied. */
+ /* We fork this all off from a child process so that we can
+ * somewhat cleanly make use of SIGALRM to set a time limit */
- executor_pid = fork();
- if (executor_pid < 0) {
- log_error_errno(errno, "Failed to fork: %m");
- return;
+ reset_all_signal_handlers();
+ reset_signal_mask();
- } else if (executor_pid == 0) {
- _cleanup_hashmap_free_free_ Hashmap *pids = NULL;
- _cleanup_closedir_ DIR *_d = NULL;
- struct dirent *de;
+ assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0);
- /* We fork this all off from a child process so that
- * we can somewhat cleanly make use of SIGALRM to set
- * a time limit */
+ pids = hashmap_new(NULL);
+ if (!pids)
+ return log_oom();
- reset_all_signal_handlers();
- reset_signal_mask();
+ seen = set_new(&string_hash_ops);
+ if (!seen)
+ return log_oom();
- assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0);
+ STRV_FOREACH(directory, directories) {
+ _cleanup_closedir_ DIR *d;
+ struct dirent *de;
+ d = opendir(*directory);
if (!d) {
- d = _d = opendir(directory);
- if (!d) {
- if (errno == ENOENT)
- _exit(EXIT_SUCCESS);
-
- log_error_errno(errno, "Failed to enumerate directory %s: %m", directory);
- _exit(EXIT_FAILURE);
- }
- }
+ if (errno == ENOENT)
+ continue;
- pids = hashmap_new(NULL);
- if (!pids) {
- log_oom();
- _exit(EXIT_FAILURE);
+ return log_error_errno(errno, "Failed to open directory %s: %m", *directory);
}
FOREACH_DIRENT(de, d, break) {
_cleanup_free_ char *path = NULL;
pid_t pid;
+ int r;
if (!dirent_is_file(de))
continue;
- path = strjoin(directory, "/", de->d_name, NULL);
- if (!path) {
- log_oom();
- _exit(EXIT_FAILURE);
+ if (set_contains(seen, de->d_name)) {
+ log_debug("%1$s/%2$s skipped (%2$s was already seen).", *directory, de->d_name);
+ continue;
+ }
+
+ r = set_put_strdup(seen, de->d_name);
+ if (r < 0)
+ return log_oom();
+
+ path = strjoin(*directory, "/", de->d_name, NULL);
+ if (!path)
+ return log_oom();
+
+ if (null_or_empty_path(path)) {
+ log_debug("%s is empty (a mask).", path);
+ continue;
}
pid = fork();
argv[0] = path;
execv(path, argv);
- log_error_errno(errno, "Failed to execute %s: %m", path);
- _exit(EXIT_FAILURE);
+ return log_error_errno(errno, "Failed to execute %s: %m", path);
}
log_debug("Spawned %s as " PID_FMT ".", path, pid);
r = hashmap_put(pids, UINT_TO_PTR(pid), path);
- if (r < 0) {
- log_oom();
- _exit(EXIT_FAILURE);
- }
-
+ if (r < 0)
+ return log_oom();
path = NULL;
}
+ }
- /* Abort execution of this process after the
- * timout. We simply rely on SIGALRM as default action
- * terminating the process, and turn on alarm(). */
-
- if (timeout != USEC_INFINITY)
- alarm((timeout + USEC_PER_SEC - 1) / USEC_PER_SEC);
+ /* Abort execution of this process after the timout. We simply
+ * rely on SIGALRM as default action terminating the process,
+ * and turn on alarm(). */
- while (!hashmap_isempty(pids)) {
- _cleanup_free_ char *path = NULL;
- pid_t pid;
+ if (timeout != USEC_INFINITY)
+ alarm((timeout + USEC_PER_SEC - 1) / USEC_PER_SEC);
- pid = PTR_TO_UINT(hashmap_first_key(pids));
- assert(pid > 0);
+ while (!hashmap_isempty(pids)) {
+ _cleanup_free_ char *path = NULL;
+ pid_t pid;
- path = hashmap_remove(pids, UINT_TO_PTR(pid));
- assert(path);
+ pid = PTR_TO_UINT(hashmap_first_key(pids));
+ assert(pid > 0);
- wait_for_terminate_and_warn(path, pid, true);
- }
+ path = hashmap_remove(pids, UINT_TO_PTR(pid));
+ assert(path);
- _exit(EXIT_SUCCESS);
+ wait_for_terminate_and_warn(path, pid, true);
}
- wait_for_terminate_and_warn(directory, executor_pid, true);
+ return 0;
}
-int kill_and_sigcont(pid_t pid, int sig) {
+void execute_directories(const char* const* directories, usec_t timeout, char *argv[]) {
+ pid_t executor_pid;
int r;
+ char *name;
+ char **dirs = (char**) directories;
- r = kill(pid, sig) < 0 ? -errno : 0;
+ assert(!strv_isempty(dirs));
- if (r >= 0)
- kill(pid, SIGCONT);
+ name = basename(dirs[0]);
+ assert(!isempty(name));
- return r;
+ /* Executes all binaries in the directories in parallel and waits
+ * for them to finish. Optionally a timeout is applied. If a file
+ * with the same name exists in more than one directory, the
+ * earliest one wins. */
+
+ executor_pid = fork();
+ if (executor_pid < 0) {
+ log_error_errno(errno, "Failed to fork: %m");
+ return;
+
+ } else if (executor_pid == 0) {
+ r = do_execute(dirs, timeout, argv);
+ _exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS);
+ }
+
+ wait_for_terminate_and_warn(name, executor_pid, true);
}
bool nulstr_contains(const char*nulstr, const char *needle) {
if (isempty(s))
return false;
+ /* Doesn't accept empty hostnames, hostnames with trailing or
+ * leading dots, and hostnames with multiple dots in a
+ * sequence. Also ensures that the length stays below
+ * HOST_NAME_MAX. */
+
for (p = s, dot = true; *p; p++) {
if (*p == '.') {
if (dot)
return true;
}
-bool image_name_is_valid(const char *s) {
- if (!filename_is_valid(s))
- return false;
-
- if (string_has_cc(s, NULL))
- return false;
-
- if (!utf8_is_valid(s))
- return false;
-
- /* Temporary files for atomically creating new files */
- if (startswith(s, ".#"))
- return false;
-
- return true;
-}
-
int pipe_eof(int fd) {
struct pollfd pollfd = {
.fd = fd,
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) {
- _cleanup_close_ int fd;
-
- fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
- if (fd < 0)
- return fd;
-
- return terminal_vhangup_fd(fd);
-}
-
-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);
- safe_close(fd);
-
- return 0;
- }
+int symlink_atomic(const char *from, const char *to) {
+ _cleanup_free_ char *t = NULL;
+ int r;
- if (!startswith(name, "/dev/tty"))
- return -EINVAL;
+ assert(from);
+ assert(to);
- r = safe_atou(name+8, &u);
+ r = tempfn_random(to, &t);
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);
- safe_close(fd);
-
- if (r >= 0)
- return 0;
-
- if (errno != EBUSY)
+ if (symlink(from, t) < 0)
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);
- safe_close(fd);
+ if (rename(t, to) < 0) {
+ unlink_noerrno(t);
+ return -errno;
+ }
return 0;
}
-int symlink_atomic(const char *from, const char *to) {
- _cleanup_free_ char *t = NULL;
+int symlink_idempotent(const char *from, const char *to) {
+ _cleanup_free_ char *p = NULL;
int r;
assert(from);
assert(to);
- r = tempfn_random(to, &t);
- if (r < 0)
- return r;
+ if (symlink(from, to) < 0) {
+ if (errno != EEXIST)
+ return -errno;
- if (symlink(from, t) < 0)
- return -errno;
+ r = readlink_malloc(to, &p);
+ if (r < 0)
+ return r;
- if (rename(t, to) < 0) {
- unlink_noerrno(t);
- return -errno;
+ if (!streq(p, from))
+ return -EINVAL;
}
return 0;
return 0;
}
-int getenv_for_pid(pid_t pid, const char *field, char **_value) {
- _cleanup_fclose_ FILE *f = NULL;
- char *value = NULL;
- int r;
- bool done = false;
- size_t l;
- const char *path;
-
- assert(pid >= 0);
- assert(field);
- assert(_value);
-
- path = procfs_file_alloca(pid, "environ");
-
- f = fopen(path, "re");
- if (!f)
- return -errno;
-
- l = strlen(field);
- r = 0;
+bool http_etag_is_valid(const char *etag) {
+ if (isempty(etag))
+ return false;
- do {
- char line[LINE_MAX];
- unsigned i;
+ if (!endswith(etag, "\""))
+ return false;
- for (i = 0; i < sizeof(line)-1; i++) {
- int c;
+ if (!startswith(etag, "\"") && !startswith(etag, "W/\""))
+ return false;
- c = getc(f);
- if (_unlikely_(c == EOF)) {
- done = true;
- break;
- } else if (c == 0)
- break;
+ return true;
+}
- line[i] = c;
- }
- line[i] = 0;
+bool http_url_is_valid(const char *url) {
+ const char *p;
- if (memcmp(line, field, l) == 0 && line[l] == '=') {
- value = strdup(line + l + 1);
- if (!value)
- return -ENOMEM;
+ if (isempty(url))
+ return false;
- r = 1;
- break;
- }
+ p = startswith(url, "http://");
+ if (!p)
+ p = startswith(url, "https://");
+ if (!p)
+ return false;
- } while (!done);
+ if (isempty(p))
+ return false;
- *_value = value;
- return r;
+ return ascii_is_valid(p);
}
-bool is_valid_documentation_url(const char *url) {
- assert(url);
-
- if (startswith(url, "http://") && url[7])
- return true;
+bool documentation_url_is_valid(const char *url) {
+ const char *p;
- if (startswith(url, "https://") && url[8])
- return true;
+ if (isempty(url))
+ return false;
- if (startswith(url, "file:") && url[5])
+ if (http_url_is_valid(url))
return true;
- if (startswith(url, "info:") && url[5])
- return true;
+ p = startswith(url, "file:/");
+ if (!p)
+ p = startswith(url, "info:");
+ if (!p)
+ p = startswith(url, "man:");
- if (startswith(url, "man:") && url[4])
- return true;
+ if (isempty(p))
+ return false;
- return false;
+ return ascii_is_valid(p);
}
bool in_initrd(void) {
return saved;
}
-void warn_melody(void) {
- _cleanup_close_ int fd = -1;
-
- fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY);
- if (fd < 0)
- return;
-
- /* Yeah, this is synchronous. Kinda sucks. But well... */
-
- ioctl(fd, KIOCSOUND, (int)(1193180/440));
- usleep(125*USEC_PER_MSEC);
-
- ioctl(fd, KIOCSOUND, (int)(1193180/220));
- usleep(125*USEC_PER_MSEC);
-
- ioctl(fd, KIOCSOUND, (int)(1193180/220));
- usleep(125*USEC_PER_MSEC);
-
- ioctl(fd, KIOCSOUND, 0);
-}
-
-int make_console_stdio(void) {
- int fd, r;
-
- /* Make /dev/console the controlling terminal and stdin/stdout/stderr */
-
- fd = acquire_terminal("/dev/console", false, true, true, USEC_INFINITY);
- if (fd < 0)
- return log_error_errno(fd, "Failed to acquire terminal: %m");
-
- r = make_stdio(fd);
- if (r < 0)
- return log_error_errno(r, "Failed to duplicate terminal fd: %m");
-
- return 0;
-}
-
int get_home_dir(char **_h) {
struct passwd *p;
const char *e;
if (streq(p, "..") || startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../"))
return false;
- if (strlen(p) > PATH_MAX)
+ if (strlen(p)+1 > PATH_MAX)
return false;
/* The following two checks are not really dangerous, but hey, they still are confusing */
return NULL;
}
+void init_gettext(void) {
+ setlocale(LC_ALL, "");
+ textdomain(GETTEXT_PACKAGE);
+}
+
bool is_locale_utf8(void) {
const char *set;
static int cached_answer = -1;
d = opendir("/sys/class/power_supply");
if (!d)
- return -errno;
+ return errno == ENOENT ? true : -errno;
for (;;) {
struct dirent *de;
_cleanup_free_ char *word = NULL;
char *value = NULL;
- r = unquote_first_word(&p, &word, true);
+ r = unquote_first_word(&p, &word, UNQUOTE_RELAX);
if (r < 0)
return r;
if (r == 0)
_cleanup_free_ char *word = NULL;
const char *e;
- r = unquote_first_word(&p, &word, true);
+ r = unquote_first_word(&p, &word, UNQUOTE_RELAX);
if (r < 0)
return r;
if (r == 0)
assert(machine);
assert(pid);
- p = strappenda("/run/systemd/machines/", machine);
+ p = strjoina("/run/systemd/machines/", machine);
r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL);
if (r == -ENOENT)
return -EHOSTDOWN;
return 0;
}
-bool pid_is_unwaited(pid_t pid) {
- /* Checks whether a PID is still valid at all, including a zombie */
-
- if (pid <= 0)
- return false;
-
- if (kill(pid, 0) >= 0)
- return true;
-
- return errno != ESRCH;
-}
-
-bool pid_is_alive(pid_t pid) {
- int r;
-
- /* Checks whether a PID is still valid and not a zombie */
-
- if (pid <= 0)
- return false;
-
- r = get_process_state(pid);
- if (r == -ENOENT || r == 'Z')
- return false;
-
- return true;
-}
-
int getpeercred(int fd, struct ucred *ucred) {
socklen_t n = sizeof(struct ucred);
struct ucred u;
if (isempty(s)) {
free(s);
- return -ENOTSUP;
+ return -EOPNOTSUPP;
}
*ret = s;
#ifdef O_TMPFILE
/* Try O_TMPFILE first, if it is supported */
- fd = open(path, flags|O_TMPFILE, S_IRUSR|S_IWUSR);
+ fd = open(path, flags|O_TMPFILE|O_EXCL, S_IRUSR|S_IWUSR);
if (fd >= 0)
return fd;
#endif
/* Fall back to unguessable name + unlinking */
- p = strappenda(path, "/systemd-tmp-XXXXXX");
+ p = strjoina(path, "/systemd-tmp-XXXXXX");
fd = mkostemp_safe(p, flags);
if (fd < 0)
return (uint64_t) mem * (uint64_t) page_size();
}
-char* mount_test_option(const char *haystack, const char *needle) {
-
- struct mntent me = {
- .mnt_opts = (char*) haystack
- };
-
- assert(needle);
-
- /* Like glibc's hasmntopt(), but works on a string, not a
- * struct mntent */
-
- if (!haystack)
- return NULL;
-
- return hasmntopt(&me, needle);
-}
-
void hexdump(FILE *f, const void *p, size_t s) {
const uint8_t *b = p;
unsigned n = 0;
continue;
}
- p = cunescape(path);
- if (!p)
- return -ENOMEM;
+ r = cunescape(path, UNESCAPE_RELAX, &p);
+ if (r < 0)
+ return r;
if (!path_startswith(p, prefix))
continue;
continue;
}
- p = cunescape(path);
- if (!p)
- return -ENOMEM;
+ r = cunescape(path, UNESCAPE_RELAX, &p);
+ if (r < 0)
+ return r;
/* Let's ignore autofs mounts. If they aren't
* triggered yet, we want to avoid triggering
* awfully racy, and thus we just won't do them. */
if (root)
- path = strappenda(root, "/etc/.pwd.lock");
+ path = strjoina(root, "/etc/.pwd.lock");
else
path = "/etc/.pwd.lock";
return !!S_ISDIR(st.st_mode);
}
-int unquote_first_word(const char **p, char **ret, bool relax) {
+int unquote_first_word(const char **p, char **ret, UnquoteFlags flags) {
_cleanup_free_ char *s = NULL;
size_t allocated = 0, sz = 0;
+ int r;
enum {
START,
case VALUE_ESCAPE:
if (c == 0) {
- if (relax)
+ if (flags & UNQUOTE_RELAX)
goto finish;
return -EINVAL;
}
- if (!GREEDY_REALLOC(s, allocated, sz+2))
+ if (!GREEDY_REALLOC(s, allocated, sz+7))
return -ENOMEM;
- s[sz++] = c;
- state = VALUE;
+ if (flags & UNQUOTE_CUNESCAPE) {
+ uint32_t u;
+
+ r = cunescape_one(*p, (size_t) -1, &c, &u);
+ if (r < 0)
+ return -EINVAL;
+
+ (*p) += r - 1;
+
+ if (c != 0)
+ s[sz++] = c; /* normal explicit char */
+ else
+ sz += utf8_encode_unichar(s + sz, u); /* unicode chars we'll encode as utf8 */
+ } else
+ s[sz++] = c;
+ state = VALUE;
break;
case SINGLE_QUOTE:
if (c == 0) {
- if (relax)
+ if (flags & UNQUOTE_RELAX)
goto finish;
return -EINVAL;
} else if (c == '\'')
case SINGLE_QUOTE_ESCAPE:
if (c == 0) {
- if (relax)
+ if (flags & UNQUOTE_RELAX)
goto finish;
return -EINVAL;
}
- if (!GREEDY_REALLOC(s, allocated, sz+2))
+ if (!GREEDY_REALLOC(s, allocated, sz+7))
return -ENOMEM;
- s[sz++] = c;
+ if (flags & UNQUOTE_CUNESCAPE) {
+ uint32_t u;
+
+ r = cunescape_one(*p, (size_t) -1, &c, &u);
+ if (r < 0)
+ return -EINVAL;
+
+ (*p) += r - 1;
+
+ if (c != 0)
+ s[sz++] = c;
+ else
+ sz += utf8_encode_unichar(s + sz, u);
+ } else
+ s[sz++] = c;
+
state = SINGLE_QUOTE;
break;
case DOUBLE_QUOTE_ESCAPE:
if (c == 0) {
- if (relax)
+ if (flags & UNQUOTE_RELAX)
goto finish;
return -EINVAL;
}
- if (!GREEDY_REALLOC(s, allocated, sz+2))
+ if (!GREEDY_REALLOC(s, allocated, sz+7))
return -ENOMEM;
- s[sz++] = c;
+ if (flags & UNQUOTE_CUNESCAPE) {
+ uint32_t u;
+
+ r = cunescape_one(*p, (size_t) -1, &c, &u);
+ if (r < 0)
+ return -EINVAL;
+
+ (*p) += r - 1;
+
+ if (c != 0)
+ s[sz++] = c;
+ else
+ sz += utf8_encode_unichar(s + sz, u);
+ } else
+ s[sz++] = c;
+
state = DOUBLE_QUOTE;
break;
return 1;
}
-int unquote_many_words(const char **p, ...) {
+int unquote_many_words(const char **p, UnquoteFlags flags, ...) {
va_list ap;
char **l;
int n = 0, i, c, r;
assert(p);
/* Count how many words are expected */
- va_start(ap, p);
+ va_start(ap, flags);
for (;;) {
if (!va_arg(ap, char **))
break;
l = newa0(char*, n);
for (c = 0; c < n; c++) {
- r = unquote_first_word(p, &l[c], false);
+ r = unquote_first_word(p, &l[c], flags);
if (r < 0) {
int j;
/* If we managed to parse all words, return them in the passed
* in parameters */
- va_start(ap, p);
+ va_start(ap, flags);
for (i = 0; i < n; i++) {
char **v;
/* Replaces a string pointer with an strdup()ed new string,
* possibly freeing the old one. */
+ if (streq_ptr(*p, s))
+ return 0;
+
if (s) {
t = strdup(s);
if (!t)
free(*p);
*p = t;
- return 0;
+ return 1;
}
int sethostname_idempotent(const char *s) {
return 0;
}
-int same_fd(int a, int b) {
- struct stat sta, stb;
- pid_t pid;
- int r, fa, fb;
+int chattr_fd(int fd, unsigned value, unsigned mask) {
+ unsigned old_attr, new_attr;
+ struct stat st;
+
+ assert(fd >= 0);
- assert(a >= 0);
- assert(b >= 0);
+ if (fstat(fd, &st) < 0)
+ return -errno;
- /* Compares two file descriptors. Note that semantics are
- * quite different depending on whether we have kcmp() or we
- * don't. If we have kcmp() this will only return true for
- * dup()ed file descriptors, but not otherwise. If we don't
- * have kcmp() this will also return true for two fds of the same
- * file, created by separate open() calls. Since we use this
- * call mostly for filtering out duplicates in the fd store
- * this difference hopefully doesn't matter too much. */
+ /* Explicitly check whether this is a regular file or
+ * directory. If it is anything else (such as a device node or
+ * fifo), then the ioctl will not hit the file systems but
+ * possibly drivers, where the ioctl might have different
+ * effects. Notably, DRM is using the same ioctl() number. */
- if (a == b)
- return true;
+ if (!S_ISDIR(st.st_mode) && !S_ISREG(st.st_mode))
+ return -ENOTTY;
- /* Try to use kcmp() if we have it. */
- pid = getpid();
- r = kcmp(pid, pid, KCMP_FILE, a, b);
- if (r == 0)
- return true;
- if (r > 0)
- return false;
- if (errno != ENOSYS)
- return -errno;
+ if (mask == 0)
+ return 0;
- /* We don't have kcmp(), use fstat() instead. */
- if (fstat(a, &sta) < 0)
+ if (ioctl(fd, FS_IOC_GETFLAGS, &old_attr) < 0)
return -errno;
- if (fstat(b, &stb) < 0)
+ new_attr = (old_attr & ~mask) | (value & mask);
+ if (new_attr == old_attr)
+ return 0;
+
+ if (ioctl(fd, FS_IOC_SETFLAGS, &new_attr) < 0)
return -errno;
- if ((sta.st_mode & S_IFMT) != (stb.st_mode & S_IFMT))
- return false;
+ return 1;
+}
- /* We consider all device fds different, since two device fds
- * might refer to quite different device contexts even though
- * they share the same inode and backing dev_t. */
+int chattr_path(const char *p, unsigned value, unsigned mask) {
+ _cleanup_close_ int fd = -1;
- if (S_ISCHR(sta.st_mode) || S_ISBLK(sta.st_mode))
- return false;
+ assert(p);
- if (sta.st_dev != stb.st_dev || sta.st_ino != stb.st_ino)
- return false;
+ if (mask == 0)
+ return 0;
+
+ fd = open(p, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
+ if (fd < 0)
+ return -errno;
+
+ return chattr_fd(fd, value, mask);
+}
+
+int read_attr_fd(int fd, unsigned *ret) {
+ struct stat st;
+
+ assert(fd >= 0);
- /* The fds refer to the same inode on disk, let's also check
- * if they have the same fd flags. This is useful to
- * distuingish the read and write side of a pipe created with
- * pipe(). */
- fa = fcntl(a, F_GETFL);
- if (fa < 0)
+ if (fstat(fd, &st) < 0)
return -errno;
- fb = fcntl(b, F_GETFL);
- if (fb < 0)
+ if (!S_ISDIR(st.st_mode) && !S_ISREG(st.st_mode))
+ return -ENOTTY;
+
+ if (ioctl(fd, FS_IOC_GETFLAGS, ret) < 0)
return -errno;
- return fa == fb;
+ return 0;
}
-int chattr_fd(int fd, bool b, int mask) {
- int old_attr, new_attr;
+int read_attr_path(const char *p, unsigned *ret) {
+ _cleanup_close_ int fd = -1;
- assert(fd >= 0);
+ assert(p);
+ assert(ret);
- if (ioctl(fd, FS_IOC_GETFLAGS, &old_attr) < 0)
+ fd = open(p, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
+ if (fd < 0)
return -errno;
- if (b)
- new_attr = old_attr | mask;
+ return read_attr_fd(fd, ret);
+}
+
+static size_t nul_length(const uint8_t *p, size_t sz) {
+ size_t n = 0;
+
+ while (sz > 0) {
+ if (*p != 0)
+ break;
+
+ n++;
+ p++;
+ sz--;
+ }
+
+ return n;
+}
+
+ssize_t sparse_write(int fd, const void *p, size_t sz, size_t run_length) {
+ const uint8_t *q, *w, *e;
+ ssize_t l;
+
+ q = w = p;
+ e = q + sz;
+ while (q < e) {
+ size_t n;
+
+ n = nul_length(q, e - q);
+
+ /* If there are more than the specified run length of
+ * NUL bytes, or if this is the beginning or the end
+ * of the buffer, then seek instead of write */
+ if ((n > run_length) ||
+ (n > 0 && q == p) ||
+ (n > 0 && q + n >= e)) {
+ if (q > w) {
+ l = write(fd, w, q - w);
+ if (l < 0)
+ return -errno;
+ if (l != q -w)
+ return -EIO;
+ }
+
+ if (lseek(fd, n, SEEK_CUR) == (off_t) -1)
+ return -errno;
+
+ q += n;
+ w = q;
+ } else if (n > 0)
+ q += n;
+ else
+ q ++;
+ }
+
+ if (q > w) {
+ l = write(fd, w, q - w);
+ if (l < 0)
+ return -errno;
+ if (l != q - w)
+ return -EIO;
+ }
+
+ return q - (const uint8_t*) p;
+}
+
+void sigkill_wait(pid_t *pid) {
+ if (!pid)
+ return;
+ if (*pid <= 1)
+ return;
+
+ if (kill(*pid, SIGKILL) > 0)
+ (void) wait_for_terminate(*pid, NULL);
+}
+
+int syslog_parse_priority(const char **p, int *priority, bool with_facility) {
+ int a = 0, b = 0, c = 0;
+ int k;
+
+ assert(p);
+ assert(*p);
+ assert(priority);
+
+ if ((*p)[0] != '<')
+ return 0;
+
+ if (!strchr(*p, '>'))
+ return 0;
+
+ 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 0;
+
+ if (a < 0 || b < 0 || c < 0 ||
+ (!with_facility && (a || b || c > 7)))
+ return 0;
+
+ if (with_facility)
+ *priority = a*100 + b*10 + c;
else
- new_attr = old_attr & ~mask;
+ *priority = (*priority & LOG_FACMASK) | c;
- if (new_attr == old_attr)
+ *p += k;
+ return 1;
+}
+
+ssize_t string_table_lookup(const char * const *table, size_t len, const char *key) {
+ size_t i;
+
+ if (!key)
+ return -1;
+
+ for (i = 0; i < len; ++i)
+ if (streq_ptr(table[i], key))
+ return (ssize_t)i;
+
+ return -1;
+}
+
+void cmsg_close_all(struct msghdr *mh) {
+ struct cmsghdr *cmsg;
+
+ assert(mh);
+
+ for (cmsg = CMSG_FIRSTHDR(mh); cmsg; cmsg = CMSG_NXTHDR(mh, cmsg))
+ if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS)
+ close_many((int*) CMSG_DATA(cmsg), (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int));
+}
+
+int rename_noreplace(int olddirfd, const char *oldpath, int newdirfd, const char *newpath) {
+ struct stat buf;
+ int ret;
+
+ ret = renameat2(olddirfd, oldpath, newdirfd, newpath, RENAME_NOREPLACE);
+ if (ret >= 0)
return 0;
- if (ioctl(fd, FS_IOC_SETFLAGS, &new_attr) < 0)
+ /* Even though renameat2() exists since Linux 3.15, btrfs added
+ * support for it later. If it is not implemented, fallback to another
+ * method. */
+ if (errno != EINVAL)
+ return -errno;
+
+ /* The link()/unlink() fallback does not work on directories. But
+ * renameat() without RENAME_NOREPLACE gives the same semantics on
+ * directories, except when newpath is an *empty* directory. This is
+ * good enough. */
+ ret = fstatat(olddirfd, oldpath, &buf, AT_SYMLINK_NOFOLLOW);
+ if (ret >= 0 && S_ISDIR(buf.st_mode)) {
+ ret = renameat(olddirfd, oldpath, newdirfd, newpath);
+ return ret >= 0 ? 0 : -errno;
+ }
+
+ /* If it is not a directory, use the link()/unlink() fallback. */
+ ret = linkat(olddirfd, oldpath, newdirfd, newpath, 0);
+ if (ret < 0)
+ return -errno;
+
+ ret = unlinkat(olddirfd, oldpath, 0);
+ if (ret < 0) {
+ /* backup errno before the following unlinkat() alters it */
+ ret = errno;
+ (void) unlinkat(newdirfd, newpath, 0);
+ errno = ret;
return -errno;
+ }
return 0;
}
-int chattr_path(const char *p, bool b, int mask) {
- _cleanup_close_ int fd = -1;
+char *shell_maybe_quote(const char *s) {
+ const char *p;
+ char *r, *t;
- fd = open(p, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
- if (fd < 0)
+ assert(s);
+
+ /* Encloses a string in double quotes if necessary to make it
+ * OK as shell string. */
+
+ for (p = s; *p; p++)
+ if (*p <= ' ' ||
+ *p >= 127 ||
+ strchr(SHELL_NEED_QUOTES, *p))
+ break;
+
+ if (!*p)
+ return strdup(s);
+
+ r = new(char, 1+strlen(s)*2+1+1);
+ if (!r)
+ return NULL;
+
+ t = r;
+ *(t++) = '"';
+ t = mempcpy(t, s, p - s);
+
+ for (; *p; p++) {
+
+ if (strchr(SHELL_NEED_ESCAPE, *p))
+ *(t++) = '\\';
+
+ *(t++) = *p;
+ }
+
+ *(t++)= '"';
+ *t = 0;
+
+ return r;
+}
+
+int parse_mode(const char *s, mode_t *ret) {
+ char *x;
+ long l;
+
+ assert(s);
+ assert(ret);
+
+ errno = 0;
+ l = strtol(s, &x, 8);
+ if (errno != 0)
return -errno;
- return chattr_fd(fd, b, mask);
+ if (!x || x == s || *x)
+ return -EINVAL;
+ if (l < 0 || l > 07777)
+ return -ERANGE;
+
+ *ret = (mode_t) l;
+ return 0;
}
~ianmdlvl / elogind.git / blobdiff