process-util: add helper for querying oom score adjustment value

2021-10-04 16:27:10 +02:00
parent 9d0ad242b8
commit 2c37c613a7
3 changed files with 21 additions and 10 deletions
@@ -1502,6 +1502,24 @@ int set_oom_score_adjust(int value) {
                                 WRITE_STRING_FILE_VERIFY_ON_FAILURE|WRITE_STRING_FILE_DISABLE_BUFFER);
 }

+int get_oom_score_adjust(int *ret) {
+        _cleanup_free_ char *t;
+        int r, a;
+
+        r = read_virtual_file("/proc/self/oom_score_adj", SIZE_MAX, &t, NULL);
+        if (r < 0)
+                return r;
+
+        delete_trailing_chars(t, WHITESPACE);
+
+        assert_se(safe_atoi(t, &a) >= 0);
+        assert_se(oom_score_adjust_is_valid(a));
+
+        if (ret)
+                *ret = a;
+        return 0;
+}
+
 int pidfd_get_pid(int fd, pid_t *ret) {
        char path[STRLEN("/proc/self/fdinfo/") + DECIMAL_STR_MAX(int)];
        _cleanup_free_ char *fdinfo = NULL;