fd_inc_sndbuf(fd, SNDBUF_SIZE);
if (!__sync_bool_compare_and_swap(&fd_plus_one, 0, fd+1)) {
- close_nointr_nofail(fd);
+ safe_close(fd);
goto retry;
}
char buffer[8 + LINE_MAX], p[11]; struct iovec iov[2];
- if (priority < 0 || priority > 7)
- return -EINVAL;
-
- if (!format)
- return -EINVAL;
+ assert_return(priority >= 0, -EINVAL);
+ assert_return(priority <= 7, -EINVAL);
+ assert_return(format, -EINVAL);
snprintf(p, sizeof(p), "PRIORITY=%i", priority & LOG_PRIMASK);
char_array_0(p);
return sd_journal_sendv(iov, 2);
}
-static int fill_iovec_sprintf(const char *format, va_list ap, int extra, struct iovec **_iov) {
+_printf_(1, 0) static int fill_iovec_sprintf(const char *format, va_list ap, int extra, struct iovec **_iov) {
+ PROTECT_ERRNO;
int r, n = 0, i = 0, j;
struct iovec *iov = NULL;
- int saved_errno;
assert(_iov);
- saved_errno = errno;
if (extra > 0) {
n = MAX(extra * 2, extra + 4);
*_iov = iov;
- errno = saved_errno;
return i;
fail:
free(iov);
- errno = saved_errno;
return r;
}
}
_public_ int sd_journal_sendv(const struct iovec *iov, int n) {
- int fd, buffer_fd;
+ PROTECT_ERRNO;
+ int fd;
+ _cleanup_close_ int buffer_fd = -1;
struct iovec *w;
uint64_t *l;
- int r, i, j = 0;
- struct msghdr mh;
- struct sockaddr_un sa;
+ int i, j = 0;
+ struct sockaddr_un sa = {
+ .sun_family = AF_UNIX,
+ .sun_path = "/run/systemd/journal/socket",
+ };
+ struct msghdr mh = {
+ .msg_name = &sa,
+ .msg_namelen = offsetof(struct sockaddr_un, sun_path) + strlen(sa.sun_path),
+ };
ssize_t k;
- int saved_errno;
union {
struct cmsghdr cmsghdr;
uint8_t buf[CMSG_SPACE(sizeof(int))];
} control;
struct cmsghdr *cmsg;
- /* We use /dev/shm instead of /tmp here, since we want this to
- * be a tmpfs, and one that is available from early boot on
- * and where unprivileged users can create files. */
- char path[] = "/dev/shm/journal.XXXXXX";
+ bool have_syslog_identifier = false;
- if (_unlikely_(!iov))
- return -EINVAL;
+ assert_return(iov, -EINVAL);
+ assert_return(n > 0, -EINVAL);
- if (_unlikely_(n <= 0))
- return -EINVAL;
-
- saved_errno = errno;
-
- w = alloca(sizeof(struct iovec) * n * 5);
+ w = alloca(sizeof(struct iovec) * n * 5 + 3);
l = alloca(sizeof(uint64_t) * n);
for (i = 0; i < n; i++) {
char *c, *nl;
- if (_unlikely_(!iov[i].iov_base || iov[i].iov_len <= 1)) {
- r = -EINVAL;
- goto finish;
- }
+ if (_unlikely_(!iov[i].iov_base || iov[i].iov_len <= 1))
+ return -EINVAL;
c = memchr(iov[i].iov_base, '=', iov[i].iov_len);
- if (_unlikely_(!c || c == iov[i].iov_base)) {
- r = -EINVAL;
- goto finish;
- }
+ if (_unlikely_(!c || c == iov[i].iov_base))
+ return -EINVAL;
+
+ have_syslog_identifier = have_syslog_identifier ||
+ (c == (char *) iov[i].iov_base + 17 &&
+ startswith(iov[i].iov_base, "SYSLOG_IDENTIFIER"));
nl = memchr(iov[i].iov_base, '\n', iov[i].iov_len);
if (nl) {
- if (_unlikely_(nl < c)) {
- r = -EINVAL;
- goto finish;
- }
+ if (_unlikely_(nl < c))
+ return -EINVAL;
/* Already includes a newline? Bummer, then
* let's write the variable name, then a
IOVEC_SET_STRING(w[j++], "\n");
}
- fd = journal_fd();
- if (_unlikely_(fd < 0)) {
- r = fd;
- goto finish;
+ if (!have_syslog_identifier &&
+ string_is_safe(program_invocation_short_name)) {
+
+ /* Implicitly add program_invocation_short_name, if it
+ * is not set explicitly. We only do this for
+ * program_invocation_short_name, and nothing else
+ * since everything else is much nicer to retrieve
+ * from the outside. */
+
+ IOVEC_SET_STRING(w[j++], "SYSLOG_IDENTIFIER=");
+ IOVEC_SET_STRING(w[j++], program_invocation_short_name);
+ IOVEC_SET_STRING(w[j++], "\n");
}
- zero(sa);
- sa.sun_family = AF_UNIX;
- strncpy(sa.sun_path, "/run/systemd/journal/socket", sizeof(sa.sun_path));
+ fd = journal_fd();
+ if (_unlikely_(fd < 0))
+ return fd;
- zero(mh);
- mh.msg_name = &sa;
- mh.msg_namelen = offsetof(struct sockaddr_un, sun_path) + strlen(sa.sun_path);
mh.msg_iov = w;
mh.msg_iovlen = j;
k = sendmsg(fd, &mh, MSG_NOSIGNAL);
- if (k >= 0) {
- r = 0;
- goto finish;
- }
+ if (k >= 0)
+ return 0;
- if (errno != EMSGSIZE && errno != ENOBUFS) {
- r = -errno;
- goto finish;
- }
+ /* Fail silently if the journal is not available */
+ if (errno == ENOENT)
+ return 0;
+
+ if (errno != EMSGSIZE && errno != ENOBUFS)
+ return -errno;
/* Message doesn't fit... Let's dump the data in a temporary
* file and just pass a file descriptor of it to the other
- * side */
-
- buffer_fd = mkostemp(path, O_CLOEXEC|O_RDWR);
- if (buffer_fd < 0) {
- r = -errno;
- goto finish;
- }
-
- if (unlink(path) < 0) {
- close_nointr_nofail(buffer_fd);
- r = -errno;
- goto finish;
- }
+ * side.
+ *
+ * We use /dev/shm instead of /tmp here, since we want this to
+ * be a tmpfs, and one that is available from early boot on
+ * and where unprivileged users can create files. */
+ buffer_fd = open_tmpfile("/dev/shm", O_RDWR | O_CLOEXEC);
+ if (buffer_fd < 0)
+ return buffer_fd;
n = writev(buffer_fd, w, j);
- if (n < 0) {
- close_nointr_nofail(buffer_fd);
- r = -errno;
- goto finish;
- }
+ if (n < 0)
+ return -errno;
mh.msg_iov = NULL;
mh.msg_iovlen = 0;
mh.msg_controllen = cmsg->cmsg_len;
k = sendmsg(fd, &mh, MSG_NOSIGNAL);
- close_nointr_nofail(buffer_fd);
-
- if (k < 0) {
- r = -errno;
- goto finish;
- }
-
- r = 0;
-
-finish:
- errno = saved_errno;
+ if (k < 0)
+ return -errno;
- return r;
+ return 0;
}
static int fill_iovec_perror_and_send(const char *message, int skip, struct iovec iov[]) {
- size_t n, k, r;
- int saved_errno;
-
- saved_errno = errno;
+ PROTECT_ERRNO;
+ size_t n, k;
k = isempty(message) ? 0 : strlen(message) + 2;
n = 8 + k + 256 + 1;
char* j;
errno = 0;
- j = strerror_r(saved_errno, buffer + 8 + k, n - 8 - k);
+ j = strerror_r(_saved_errno_, buffer + 8 + k, n - 8 - k);
if (errno == 0) {
char error[6 + 10 + 1]; /* for a 32bit value */
memcpy(buffer + 8 + k - 2, ": ", 2);
}
- snprintf(error, sizeof(error), "ERRNO=%u", saved_errno);
+ snprintf(error, sizeof(error), "ERRNO=%u", _saved_errno_);
char_array_0(error);
IOVEC_SET_STRING(iov[skip+0], "PRIORITY=3");
IOVEC_SET_STRING(iov[skip+1], buffer);
IOVEC_SET_STRING(iov[skip+2], error);
- r = sd_journal_sendv(iov, skip + 3);
-
- errno = saved_errno;
- return r;
+ return sd_journal_sendv(iov, skip + 3);
}
- if (errno != ERANGE) {
- r = -errno;
- errno = saved_errno;
- return r;
- }
+ if (errno != ERANGE)
+ return -errno;
n *= 2;
}
}
_public_ int sd_journal_stream_fd(const char *identifier, int priority, int level_prefix) {
- union sockaddr_union sa;
- int fd;
+ union sockaddr_union sa = {
+ .un.sun_family = AF_UNIX,
+ .un.sun_path = "/run/systemd/journal/stdout",
+ };
+ _cleanup_close_ int fd = -1;
char *header;
size_t l;
- ssize_t r;
+ int r;
- if (priority < 0 || priority > 7)
- return -EINVAL;
+ assert_return(priority >= 0, -EINVAL);
+ assert_return(priority <= 7, -EINVAL);
fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0);
if (fd < 0)
return -errno;
- zero(sa);
- sa.un.sun_family = AF_UNIX;
- strncpy(sa.un.sun_path, "/run/systemd/journal/stdout", sizeof(sa.un.sun_path));
-
r = connect(fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
- if (r < 0) {
- close_nointr_nofail(fd);
+ if (r < 0)
return -errno;
- }
- if (shutdown(fd, SHUT_RD) < 0) {
- close_nointr_nofail(fd);
+ if (shutdown(fd, SHUT_RD) < 0)
return -errno;
- }
fd_inc_sndbuf(fd, SNDBUF_SIZE);
header[l++] = '0';
header[l++] = '\n';
- r = loop_write(fd, header, l, false);
- if (r < 0) {
- close_nointr_nofail(fd);
- return (int) r;
- }
+ r = (int) loop_write(fd, header, l, false);
+ if (r < 0)
+ return r;
- if ((size_t) r != l) {
- close_nointr_nofail(fd);
+ if ((size_t) r != l)
return -errno;
- }
- return fd;
+ r = fd;
+ fd = -1;
+ return r;
}
_public_ int sd_journal_print_with_location(int priority, const char *file, const char *line, const char *func, const char *format, ...) {
struct iovec iov[5];
char *f;
- if (priority < 0 || priority > 7)
- return -EINVAL;
-
- if (_unlikely_(!format))
- return -EINVAL;
+ assert_return(priority >= 0, -EINVAL);
+ assert_return(priority <= 7, -EINVAL);
+ assert_return(format, -EINVAL);
snprintf(p, sizeof(p), "PRIORITY=%i", priority & LOG_PRIMASK);
char_array_0(p);
struct iovec *niov;
char *f;
- if (_unlikely_(!iov))
- return -EINVAL;
-
- if (_unlikely_(n <= 0))
- return -EINVAL;
+ assert_return(iov, -EINVAL);
+ assert_return(n > 0, -EINVAL);
niov = alloca(sizeof(struct iovec) * (n + 3));
memcpy(niov, iov, sizeof(struct iovec) * n);