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Slightly safer OOM killer disablement in linux
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parent
754195f8d7
commit
0edbd2e016
13
slock.c
13
slock.c
@ -60,16 +60,27 @@ die(const char *errstr, ...)
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#ifdef __linux__
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#include <fcntl.h>
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#include <linux/oom.h>
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static void
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dontkillme(void)
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{
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int fd;
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int length;
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char value[64];
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fd = open("/proc/self/oom_score_adj", O_WRONLY);
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if (fd < 0 && errno == ENOENT)
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return;
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if (fd < 0 || write(fd, "-1000\n", 6) != 6 || close(fd) != 0)
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/* convert OOM_SCORE_ADJ_MIN to string for writing */
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length = snprintf(value, sizeof(value), "%d\n", OOM_SCORE_ADJ_MIN);
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/* bail on truncation */
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if (length >= sizeof(value))
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die("buffer too small\n");
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if (fd < 0 || write(fd, value, length) != length || close(fd) != 0)
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die("cannot disable the out-of-memory killer for this process\n");
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}
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#endif
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