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Function atoi is not safe since miss validation; Function strtol is better but need to consider empty string and overflows Function util_strtonum is a safer wrapper of strtoll Use util_strtonum to check nodeid option and strict checking condition. Signed-off-by: liangxin1300 <XLiang@suse.com> Reviewed-by: Jan Friesse <jfriesse@redhat.com>
36 lines
689 B
C
36 lines
689 B
C
#include <stdlib.h>
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#include <errno.h>
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#include "util.h"
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/*
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* Safer wrapper of strtoll. Return 0 on success, otherwise -1.
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* Idea from corosync-qdevice project
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*/
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int
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util_strtonum(const char *str, long long int min_val, long long int max_val,
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long long int *res)
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{
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long long int tmp_ll;
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char *ep;
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if (min_val > max_val) {
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return (-1);
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}
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errno = 0;
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tmp_ll = strtoll(str, &ep, 10);
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if (ep == str || *ep != '\0' || errno != 0) {
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return (-1);
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}
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if (tmp_ll < min_val || tmp_ll > max_val) {
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return (-1);
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}
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*res = tmp_ll;
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return (0);
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}
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