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closefrom: Handle lowfd < 0 properly

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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>
This commit is contained in:
cptpcrd 2021-02-07 14:22:21 -05:00 committed by Guillem Jover
parent a1f79978e8
commit c4fca5bb4f
1 changed files with 3 additions and 0 deletions
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3
src/closefrom.c
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@ -179,6 +179,9 @@ closefrom_procfs(int lowfd)
void void
closefrom(int lowfd) closefrom(int lowfd)
{ {
if (lowfd < 0)
lowfd = 0;
/* Try the fast method first, if possible. */ /* Try the fast method first, if possible. */
#if defined(HAVE_FCNTL_CLOSEM) #if defined(HAVE_FCNTL_CLOSEM)
if (fcntl(lowfd, F_CLOSEM, 0) != -1) if (fcntl(lowfd, F_CLOSEM, 0) != -1)