closefrom: Handle lowfd < 0 properly

More important if close_range() is going to be used, since casting
negative values to 'unsigned int' might hide the errors.

[guillem@hadrons.org: Minor coding style fix. ]

Signed-off-by: Guillem Jover <guillem@hadrons.org>

diff --git a/src/closefrom.c b/src/closefrom.c
index be38813a1984a6e7f8c84f817c01564552a8e0ed..e2e10a888765847f812c6ecd06ef7e40367906c9 100644 (file)
--- a/src/closefrom.c
+++ b/src/closefrom.c
@@ -179,6 +179,9 @@ closefrom_procfs(int lowfd)
 void
 closefrom(int lowfd)
 {
+       if (lowfd < 0)
+               lowfd = 0;
+
        /* Try the fast method first, if possible. */
 #if defined(HAVE_FCNTL_CLOSEM)
        if (fcntl(lowfd, F_CLOSEM, 0) != -1)