1 files changed, 15 insertions, 7 deletions

diff --git a/slock.c b/slock.c
index 3e2ab8f..9ec2f71 100644
--- a/slock.c
+++ b/slock.c
@@ -65,19 +65,27 @@ die(const char *errstr, ...)
 
 #ifdef __linux__
 #include <fcntl.h>
+#include <linux/oom.h>
 
 static void
 dontkillme(void)
 {
-        int fd;
+        FILE *f;
+        const char oomfile[] = "/proc/self/oom_score_adj";
 
-        fd = open("/proc/self/oom_score_adj", O_WRONLY);
-        if (fd < 0 && errno == ENOENT) {
-                return;
+        if (!(f = fopen(oomfile, "w"))) {
+                if (errno == ENOENT)
+                        return;
+                die("slock: fopen %s: %s\n", oomfile, strerror(errno));
         }
-        if (fd < 0 || write(fd, "-1000\n", (sizeof("-1000\n") - 1)) !=
-            (sizeof("-1000\n") - 1) || close(fd) != 0) {
-                die("can't tame the oom-killer. is suid or sgid set?\n");
+        fprintf(f, "%d", OOM_SCORE_ADJ_MIN);
+        if (fclose(f)) {
+                if (errno == EACCES)
+                        die("slock: unable to disable OOM killer. "
+                            "suid or sgid set?\n");
+                else
+                        die("slock: fclose %s: %s\n", oomfile,
+                            strerror(errno));
         }
 }
 #endif