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kill: check errno after strto..() 

Addresses: https://github.com/karelzak/util-linux/issues/1356
Signed-off-by: Karel Zak <kzak@redhat.com>
This commit is contained in:
Karel Zak 2021-06-21 15:32:51 +02:00
parent 21ef212a58
commit 7a50f117a4
1 changed files with 2 additions and 1 deletions
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3
misc-utils/kill.c
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@ -176,10 +176,11 @@ static int arg_to_signum(char *arg, int maskbit)
char *ep;
if (isdigit(*arg)) {
errno = 0;
numsig = strtol(arg, &ep, 10);
if (NSIG <= numsig && maskbit && (numsig & 128) != 0)
numsig -= 128;
if (*ep != 0 || numsig < 0 || NSIG <= numsig)
if (errno || *ep != 0 || numsig < 0 || NSIG <= numsig)
return -1;
return numsig;
}