klesh/slock
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Slightly safer OOM killer disablement in linux

Browse Source
This commit is contained in:
David Phillips 2015-06-19 23:42:15 +12:00 committed by Markus Teich
parent 754195f8d7
commit 0edbd2e016
1 changed files with 12 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
slock.c
View File

@ -60,16 +60,27 @@ die(const char *errstr, ...)
#ifdef __linux__
#include <fcntl.h>
#include <linux/oom.h>
static void
dontkillme(void)
{
int fd;
int length;
char value[64];
fd = open("/proc/self/oom_score_adj", O_WRONLY);
if (fd < 0 && errno == ENOENT)
return;
if (fd < 0 || write(fd, "-1000\n", 6) != 6 || close(fd) != 0)
/* convert OOM_SCORE_ADJ_MIN to string for writing */
length = snprintf(value, sizeof(value), "%d\n", OOM_SCORE_ADJ_MIN);
/* bail on truncation */
if (length >= sizeof(value))
die("buffer too small\n");
if (fd < 0 || write(fd, value, length) != length || close(fd) != 0)
die("cannot disable the out-of-memory killer for this process\n");
}
#endif