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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2022 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.
*/
#include <config.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define SUDO_ERROR_WRAP 0
#include "sudo_compat.h"
#include "sudo_fatal.h"
#include "sudo_util.h"
sudo_dso_public int main(int argc, char *argv[]);
/*
* Test that sudo_closefrom() works as expected.
*/
int
main(int argc, char *argv[])
{
int ch, fds[2], flag, maxfd, minfd, errors = 0, ntests = 0;
initprogname(argc > 0 ? argv[0] : "closefrom_test");
while ((ch = getopt(argc, argv, "v")) != -1) {
switch (ch) {
case 'v':
/* ignore */
break;
default:
fprintf(stderr, "usage: %s [-v]\n", getprogname());
return EXIT_FAILURE;
}
}
argc -= optind;
argv += optind;
/* We use pipe() because it doesn't rely on the filesystem. */
ntests++;
if (pipe(fds) == -1) {
sudo_warn("%s", "pipe");
errors++;
goto done;
}
maxfd = MAX(fds[0], fds[1]);
minfd = MIN(fds[0], fds[1]);
/* Close any fds greater than fds[0] and fds[1]. */
sudo_closefrom(maxfd + 1);
/* Verify that sudo_closefrom() didn't close fds[0] or fds[1]. */
ntests++;
if (fcntl(fds[0], F_GETFL, 0) == -1) {
sudo_warnx("fd %d closed prematurely", fds[0]);
errors++;
goto done;
}
ntests++;
if (fcntl(fds[1], F_GETFL, 0) == -1) {
sudo_warnx("fd %d closed prematurely", fds[1]);
errors++;
goto done;
}
/* Close fds[0], fds[1] and above. */
sudo_closefrom(minfd);
/* Verify that sudo_closefrom() closed both fds. */
ntests++;
flag = fcntl(fds[0], F_GETFD, 0);
#ifdef __APPLE__
/* We only set the close-on-exec flag on macOS. */
if (flag == 1)
flag = -1;
#endif
if (flag != -1) {
sudo_warnx("fd %d still open", fds[0]);
errors++;
goto done;
}
ntests++;
flag = fcntl(fds[1], F_GETFD, 0);
#ifdef __APPLE__
/* We only set the close-on-exec flag on macOS. */
if (flag == 1)
flag = -1;
#endif
if (flag != -1) {
sudo_warnx("fd %d still open", fds[1]);
errors++;
goto done;
}
done:
if (ntests != 0) {
printf("%s: %d tests run, %d errors, %d%% success rate\n",
getprogname(), ntests, errors, (ntests - errors) * 100 / ntests);
}
return errors;
}
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