slock

simple X display locker utility
git clone git://git.suckless.org/slock
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commit 0edbd2e0164a8c6cbad415e38083469041f29996
parent 754195f8d75586e23d1cc69cad00710802e0cb5d
Author: David Phillips <dbphillipsnz@gmail.com>
Date:   Fri, 19 Jun 2015 23:42:15 +1200

Slightly safer OOM killer disablement in linux

Diffstat:
slock.c | 13++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/slock.c b/slock.c @@ -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