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60 lines
1.7 KiB
Diff
60 lines
1.7 KiB
Diff
From 3abbffa4934a62146e995ee7c2cf3ba50991b4ad Mon Sep 17 00:00:00 2001
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From: FRIGN <dev@frign.de>
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Date: Sun, 14 Feb 2016 01:28:37 +0100
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Subject: [PATCH 1/7] Simplify the oom-taming-function
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There really is no need to source a defined variable from a linux
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header. The OOM-rank ranges from -1000 to 1000, so we can safely
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hardcode -1000, which is a sane thing to do given slock is suid and
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we don't want to play around too much here anyway.
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On another notice, let's not forget that this still is a shitty
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heuristic. The OOM-killer still can kill us (thus I also changed
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the wording in the error-message. We do not disable the OOM-killer,
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we're just hiding.
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---
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slock.c | 20 ++++++--------------
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1 file changed, 6 insertions(+), 14 deletions(-)
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diff --git a/slock.c b/slock.c
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index cf49555..3188ff7 100644
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--- a/slock.c
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+++ b/slock.c
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@@ -60,28 +60,20 @@ 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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+ if (fd < 0 && errno == ENOENT) {
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return;
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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 (make sure to suid or sgid slock)\n");
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+ }
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+ if (fd < 0 || write(fd, "-1000\n", (sizeof("-1000\n") - 1)) !=
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+ (sizeof("-1000\n") - 1) || close(fd) != 0) {
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+ die("can't tame the oom-killer. is suid or sgid set?\n");
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+ }
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}
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#endif
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--
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2.9.2
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