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log: never block on syslog in PID 1
[elogind.git]
/
src
/
log.c
diff --git
a/src/log.c
b/src/log.c
index 5c5b734f2f83c96a9bf7cb18cfdf89e630dbea0e..4f57821da3a97ca91efe17302be7c9fbb4333a63 100644
(file)
--- a/
src/log.c
+++ b/
src/log.c
@@
-118,6
+118,9
@@
static int create_log_socket(int type) {
struct timeval tv;
int fd;
struct timeval tv;
int fd;
+ if (getpid() == 1)
+ /* systemd should not block on syslog */
+ type |= SOCK_NONBLOCK;
if ((fd = socket(AF_UNIX, type|SOCK_CLOEXEC, 0)) < 0)
return -errno;
if ((fd = socket(AF_UNIX, type|SOCK_CLOEXEC, 0)) < 0)
return -errno;
@@
-330,7
+333,8
@@
static int write_to_syslog(
for (;;) {
ssize_t n;
for (;;) {
ssize_t n;
- if ((n = sendmsg(syslog_fd, &msghdr, MSG_NOSIGNAL)) < 0)
+ n = sendmsg(syslog_fd, &msghdr, MSG_NOSIGNAL);
+ if (n < 0)
return -errno;
if (!syslog_is_stream ||
return -errno;
if (!syslog_is_stream ||
@@
-407,8
+411,10
@@
static int log_dispatch(
log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
log_target == LOG_TARGET_SYSLOG) {
log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
log_target == LOG_TARGET_SYSLOG) {
- if ((k = write_to_syslog(level, file, line, func, buffer)) < 0) {
- log_close_syslog();
+ k = write_to_syslog(level, file, line, func, buffer);
+ if (k < 0) {
+ if (k != -EAGAIN)
+ log_close_syslog();
log_open_kmsg();
} else if (k > 0)
r++;
log_open_kmsg();
} else if (k > 0)
r++;
@@
-419,16
+425,19
@@
static int log_dispatch(
log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
log_target == LOG_TARGET_KMSG)) {
log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
log_target == LOG_TARGET_KMSG)) {
- if ((k = write_to_kmsg(level, file, line, func, buffer)) < 0) {
+ k = write_to_kmsg(level, file, line, func, buffer);
+ if (k < 0) {
log_close_kmsg();
log_open_console();
} else if (k > 0)
r++;
}
log_close_kmsg();
log_open_console();
} else if (k > 0)
r++;
}
- if (k <= 0 &&
- (k = write_to_console(level, file, line, func, buffer)) < 0)
- return k;
+ if (k <= 0) {
+ k = write_to_console(level, file, line, func, buffer);
+ if (k < 0)
+ return k;
+ }
buffer = e;
} while (buffer);
buffer = e;
} while (buffer);