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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2013-2020 Todd C. Miller <Todd.Miller@sudo.ws>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* This is an open source non-commercial project. Dear PVS-Studio, please check it.
* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
*/
#include <config.h>
#include <sys/types.h> /* for id_t */
#ifdef HAVE_STDBOOL_H
# include <stdbool.h>
#else
# include "compat/stdbool.h"
#endif
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include "sudo_compat.h"
#include "sudo_debug.h"
#include "sudo_gettext.h"
#include "sudo_util.h"
/* strtoid.c (not exported) */
long long sudo_strtonumx(const char *str, long long minval, long long maxval, char **ep, const char **errstrp);
/*
* Make sure that the ID ends with a valid separator char.
*/
static bool
valid_separator(const char *p, const char *ep, const char *sep)
{
bool valid = false;
if (ep != p) {
/* check for valid separator (including '\0') */
if (sep == NULL)
sep = "";
do {
if (*ep == *sep)
valid = true;
} while (*sep++ != '\0');
}
return valid;
}
/*
* Parse a uid/gid in string form.
* If sep is non-NULL, it contains valid separator characters (e.g. comma, space)
* If endp is non-NULL it is set to the next char after the ID.
* On success, returns the parsed ID and clears errstr.
* On error, returns 0 and sets errstr.
*/
id_t
sudo_strtoidx_v1(const char *p, const char *sep, char **endp, const char **errstrp)
{
const char *errstr;
char *ep;
id_t ret;
debug_decl(sudo_strtoid, SUDO_DEBUG_UTIL);
ret = sudo_strtonumx(p, INT_MIN, UINT_MAX, &ep, &errstr);
if (errstr == NULL) {
/*
* Disallow id -1 (UINT_MAX), which means "no change"
* and check for a valid separator (if specified).
*/
if (ret == (id_t)-1 || ret == (id_t)UINT_MAX || !valid_separator(p, ep, sep)) {
errstr = N_("invalid value");
errno = EINVAL;
ret = 0;
}
}
if (errstrp != NULL)
*errstrp = errstr;
if (endp != NULL)
*endp = ep;
debug_return_id_t(ret);
}
/* Backward compatibility */
id_t
sudo_strtoid_v1(const char *p, const char *sep, char **endp, const char **errstrp)
{
return sudo_strtoidx_v1(p, sep, endp, errstrp);
}
/* Simplified interface */
id_t
sudo_strtoid_v2(const char *p, const char **errstrp)
{
return sudo_strtoidx_v1(p, NULL, NULL, errstrp);
}
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