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udevd: disable OOM
Signed-off-by: Kay Sievers <kay.sievers@suse.de>
This commit is contained in:
parent
57d782bf1e
commit
3904a75817
49
udevd.c
49
udevd.c
@ -814,7 +814,7 @@ static int init_uevent_netlink_sock(void)
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int main(int argc, char *argv[], char *envp[])
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{
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int retval;
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int devnull;
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int fd;
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struct sigaction act;
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fd_set readfds;
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const char *value;
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@ -824,20 +824,20 @@ int main(int argc, char *argv[], char *envp[])
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int rc = 0;
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/* redirect std fd's, if the kernel forks us, we don't have them at all */
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devnull = open("/dev/null", O_RDWR);
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if (devnull >= 0) {
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if (devnull != STDIN_FILENO)
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dup2(devnull, STDIN_FILENO);
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if (devnull != STDOUT_FILENO)
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dup2(devnull, STDOUT_FILENO);
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if (devnull != STDERR_FILENO)
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dup2(devnull, STDERR_FILENO);
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if (devnull > STDERR_FILENO)
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close(devnull);
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fd = open("/dev/null", O_RDWR);
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if (fd >= 0) {
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if (fd != STDIN_FILENO)
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dup2(fd, STDIN_FILENO);
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if (fd != STDOUT_FILENO)
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dup2(fd, STDOUT_FILENO);
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if (fd != STDERR_FILENO)
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dup2(fd, STDERR_FILENO);
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if (fd > STDERR_FILENO)
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close(fd);
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}
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logging_init("udevd");
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if (devnull < 0)
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if (fd < 0)
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err("fatal, could not open /dev/null");
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udev_init_config();
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@ -889,13 +889,6 @@ int main(int argc, char *argv[], char *envp[])
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switch (pid) {
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case 0:
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dbg("daemonized fork running");
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/* become session leader */
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sid = setsid();
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dbg("our session is %d", sid);
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chdir("/");
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umask(umask(077) | 022);
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break;
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case -1:
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err("fork of daemon failed");
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@ -907,9 +900,25 @@ int main(int argc, char *argv[], char *envp[])
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}
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}
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/* set a reasonable scheduling priority for the daemon */
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/* set scheduling priority for the daemon */
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setpriority(PRIO_PROCESS, 0, UDEVD_PRIORITY);
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chdir("/");
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umask(077);
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/* become session leader */
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sid = setsid();
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dbg("our session is %d", sid);
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/* OOM_DISABLE == -17 */
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fd = open("/proc/self/oom_adj", O_RDWR);
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if (fd < 0)
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err("error disabling OOM");
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else {
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write(fd, "-17", 3);
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close(fd);
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}
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/* setup signal handler pipe */
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retval = pipe(signal_pipe);
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if (retval < 0) {
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