mirror of https://github.com/sudo-project/sudo.git
109 lines
2.9 KiB
C
109 lines
2.9 KiB
C
/*
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* SPDX-License-Identifier: ISC
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*
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* Copyright (c) 2013-2020 Todd C. Miller <Todd.Miller@sudo.ws>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* This is an open source non-commercial project. Dear PVS-Studio, please check it.
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* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
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*/
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#include <config.h>
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#include <sys/types.h> /* for id_t */
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#ifdef HAVE_STDBOOL_H
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# include <stdbool.h>
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#else
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# include <compat/stdbool.h>
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#endif
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#include <ctype.h>
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#include <errno.h>
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#include <limits.h>
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#include <sudo_compat.h>
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#include <sudo_debug.h>
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#include <sudo_gettext.h>
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#include <sudo_util.h>
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/*
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* Make sure that the ID ends with a valid separator char.
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*/
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static bool
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valid_separator(const char *p, const char *ep, const char *sep)
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{
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bool valid = false;
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if (ep != p) {
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/* check for valid separator (including '\0') */
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if (sep == NULL)
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sep = "";
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do {
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if (*ep == *sep)
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valid = true;
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} while (*sep++ != '\0');
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}
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return valid;
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}
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/*
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* Parse a uid/gid in string form.
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* If sep is non-NULL, it contains valid separator characters (e.g. comma, space)
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* If endp is non-NULL it is set to the next char after the ID.
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* On success, returns the parsed ID and clears errstr.
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* On error, returns 0 and sets errstr.
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*/
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id_t
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sudo_strtoidx_v1(const char *p, const char *sep, char **endp, const char **errstrp)
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{
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const char *errstr;
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char *ep;
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id_t ret;
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debug_decl(sudo_strtoid, SUDO_DEBUG_UTIL);
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ret = (id_t)sudo_strtonumx(p, INT_MIN, UINT_MAX, &ep, &errstr);
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if (errstr == NULL) {
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/*
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* Disallow id -1 (UINT_MAX), which means "no change"
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* and check for a valid separator (if specified).
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*/
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if (ret == (id_t)-1 || ret == (id_t)UINT_MAX || !valid_separator(p, ep, sep)) {
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errstr = N_("invalid value");
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errno = EINVAL;
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ret = 0;
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}
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}
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if (errstrp != NULL)
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*errstrp = errstr;
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if (endp != NULL)
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*endp = ep;
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debug_return_id_t(ret);
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}
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/* Backward compatibility */
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id_t
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sudo_strtoid_v1(const char *p, const char *sep, char **endp, const char **errstrp)
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{
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return sudo_strtoidx_v1(p, sep, endp, errstrp);
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}
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/* Simplified interface */
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id_t
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sudo_strtoid_v2(const char *p, const char **errstrp)
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{
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return sudo_strtoidx_v1(p, NULL, NULL, errstrp);
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}
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