1c464d9a2d
- Set errno = 0 before the call. Otherwise, it may contain anything. - ERANGE is not the only possible errno value of these functions. They can also set it to EINVAL. - Any errno value after these calls is bad; just compare against 0. - Don't check for the return value; just errno. This function is guaranteed to not modify errno on success (POSIX). - Check endptr == str, which may or may not set EINVAL. Suggested-by: Iker Pedrosa <ipedrosa@redhat.com> Signed-off-by: Alejandro Colomar <alx@kernel.org>
32 lines
506 B
C
32 lines
506 B
C
/*
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* SPDX-FileCopyrightText: 2009 , Nicolas François
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <config.h>
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#ident "$Id$"
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#include "prototypes.h"
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#include "defines.h"
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int get_uid (const char *uidstr, uid_t *uid)
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{
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long long val;
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char *endptr;
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errno = 0;
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val = strtoll(uidstr, &endptr, 10);
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if ( ('\0' == *uidstr)
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|| ('\0' != *endptr)
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|| (0 != errno)
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|| (/*@+longintegral@*/val != (uid_t)val)/*@=longintegral@*/) {
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return 0;
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}
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*uid = val;
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return 1;
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}
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