From e710b77f13a62e01739489eaac07ca02b693909d Mon Sep 17 00:00:00 2001
From: Erik Arvstedt <erik.arvstedt@gmail.com>
Date: Mar 31 2022 12:46:00 +0000
Subject: Fix inverted fuser exit status check


The exit status of `fuser` is 0 when no processes are accessing the file.
This applies to both the psmisc and busybox `fuser` implementations.

The inverted check caused tmpwatch to delete used files and skip unused
files.

---

diff --git a/tmpwatch.c b/tmpwatch.c
index e9cfb36..e340895 100644
--- a/tmpwatch.c
+++ b/tmpwatch.c
@@ -218,6 +218,7 @@ safe_chdir(const char *fulldirname, const char *reldirname, dev_t st_dev,
 }
 
 #ifdef FUSER
+/* Returns 1 if filename is in use */
 static int
 check_fuser(const char *filename)
 {
@@ -251,7 +252,7 @@ check_fuser(const char *filename)
 	waitpid(pid, &ret, 0);
     }
 
-    return (WIFEXITED(ret) && WEXITSTATUS(ret) == 0);
+    return (WIFEXITED(ret) && WEXITSTATUS(ret) != 0);
 }
 #else
 #define check_fuser(FILENAME) 0