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Slightly safer OOM killer disablement in linux - slock - simple X display locke… |
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git clone git://git.suckless.org/slock |
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--- |
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commit 0edbd2e0164a8c6cbad415e38083469041f29996 |
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parent 754195f8d75586e23d1cc69cad00710802e0cb5d |
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Author: David Phillips <[email protected]> |
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Date: Fri, 19 Jun 2015 23:42:15 +1200 |
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Slightly safer OOM killer disablement in linux |
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Diffstat: |
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M slock.c | 13 ++++++++++++- |
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1 file changed, 12 insertions(+), 1 deletion(-) |
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--- |
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diff --git a/slock.c b/slock.c |
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@@ -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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+ |
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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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+ |
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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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+ |
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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\… |
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} |
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#endif |
