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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 1996, 1998-2005, 2010-2012, 2014-2016
* 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.
*
* Sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F39502-99-1-0512.
*/
/*
* 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/stat.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "sudoers.h"
/*
* Verify that path is a normal file and executable by root.
*/
bool
sudo_goodpath(const char *path, const char *runchroot, struct stat *sbp)
{
bool ret = false;
debug_decl(sudo_goodpath, SUDOERS_DEBUG_UTIL);
if (path != NULL) {
char pathbuf[PATH_MAX];
struct stat sb;
if (runchroot != NULL) {
const int len =
snprintf(pathbuf, sizeof(pathbuf), "%s%s", runchroot, path);
if (len >= ssizeof(pathbuf)) {
errno = ENAMETOOLONG;
goto done;
}
path = pathbuf; // -V507
}
if (sbp == NULL)
sbp = &sb;
if (stat(path, sbp) == 0) {
/* Make sure path describes an executable regular file. */
if (S_ISREG(sbp->st_mode) && ISSET(sbp->st_mode, S_IXUSR|S_IXGRP|S_IXOTH))
ret = true;
else
errno = EACCES;
}
}
done:
debug_return_bool(ret);
}
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