util: add new safe_close_above_stdio() wrapper

At various places we only want to close fds if they are not
stdin/stdout/stderr, i.e. fds 0, 1, 2. Let's add a unified helper call
for that, and port everything over.

1 files changed, 1 insertions, 3 deletions

diff --git a/src/journal/cat.c b/src/journal/cat.c
index b2f9ed5010..c87a149a4c 100644
--- a/src/journal/cat.c
+++ b/src/journal/cat.c
@@ -141,9 +141,7 @@ int main(int argc, char *argv[]) {
                 goto finish;
         }
 
-        if (fd >= 3)
-                safe_close(fd);
-        fd = -1;
+        fd = safe_close_above_stdio(fd);
 
         if (argc <= optind)
                 (void) execl("/bin/cat", "/bin/cat", NULL);