Never call qsort on potentially NULL arrays

This extends 62678ded 'efi: never call qsort on potentially
NULL arrays' to all other places where qsort is used and it
is not obvious that the count is non-zero.

Signed-off-by: Anthony G. Basile <blueness@gentoo.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/src/libudev/util.h b/src/libudev/util.h
index 18109938e0..88bd771a82 100644
--- a/src/libudev/util.h
+++ b/src/libudev/util.h
@@ -283,3 +283,11 @@ static inline void _reset_errno_(int *saved_errno) {
 }
 
 #define PROTECT_ERRNO _cleanup_(_reset_errno_) __attribute__((unused)) int _saved_errno_ = errno
+
+static inline void qsort_safe(void *base, size_t nmemb, size_t size,
+                              int (*compar)(const void *, const void *)) {
+        if (nmemb) {
+                assert(base);
+                qsort(base, nmemb, size, compar);
+        }
+}