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-rw-r--r--src/util.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/src/util.c b/src/util.c
index 85ee09d142..12c19b353b 100644
--- a/src/util.c
+++ b/src/util.c
@@ -3313,6 +3313,21 @@ void freeze(void) {
pause();
}
+bool null_or_empty(struct stat *st) {
+ assert(st);
+
+ if (S_ISREG(st->st_mode) && st->st_size <= 0)
+ return true;
+
+ /* /dev/null has major/minor of 1:3 */
+ if (S_ISCHR(st->st_mode) &&
+ major(st->st_rdev) == 1 &&
+ minor(st->st_rdev) == 3)
+ return true;
+
+ return false;
+}
+
static const char *const ioprio_class_table[] = {
[IOPRIO_CLASS_NONE] = "none",
[IOPRIO_CLASS_RT] = "realtime",