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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2013-2020, 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 <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#ifdef HAVE_STDBOOL_H
# include <stdbool.h>
#else
# include <compat/stdbool.h>
#endif /* HAVE_STDBOOL_H */
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include <errno.h>
#include <sudo_compat.h>
#include <sudo_fatal.h>
#include <sudo_util.h>
#include <sudo_debug.h>
sudo_dso_public int main(int argc, char *argv[]);
int sudo_debug_instance = SUDO_DEBUG_INSTANCE_INITIALIZER;
extern char *get_process_ttyname(char *name, size_t namelen);
static int
match_ttys(const char *tty1, const char *tty2)
{
struct stat sb1, sb2;
if (tty1 != NULL && tty2 != NULL) {
if (strcmp(tty1, tty2) == 0)
return 0;
/* Could be the same device with a different name. */
if (stat(tty1, &sb1) == 0 && S_ISCHR(sb1.st_mode) &&
stat(tty2, &sb2) == 0 && S_ISCHR(sb2.st_mode)) {
if (sb1.st_rdev == sb2.st_rdev)
return 0;
}
} else if (tty1 == NULL && tty2 == NULL) {
return 0;
}
return 1;
}
int
main(int argc, char *argv[])
{
char *tty_libc = NULL, *tty_sudo = NULL;
char pathbuf[PATH_MAX];
bool verbose = false;
int ch, errors = 0, ntests = 1;
initprogname(argc > 0 ? argv[0] : "check_ttyname");
while ((ch = getopt(argc, argv, "v")) != -1) {
switch (ch) {
case 'v':
verbose = true;
break;
default:
fprintf(stderr, "usage: %s [-v]\n", getprogname());
return EXIT_FAILURE;
}
}
/* Lookup tty name using kernel info if possible. */
if (get_process_ttyname(pathbuf, sizeof(pathbuf)) != NULL)
tty_sudo = pathbuf;
#if defined(HAVE_KINFO_PROC2_NETBSD) || \
defined(HAVE_KINFO_PROC_OPENBSD) || \
defined(HAVE_KINFO_PROC_FREEBSD) || \
defined(HAVE_KINFO_PROC_DFLY) || \
defined(HAVE_KINFO_PROC_44BSD) || \
defined(HAVE__TTYNAME_DEV) || defined(HAVE_STRUCT_PSINFO_PR_TTYDEV) || \
defined(HAVE_PSTAT_GETPROC) || defined(__linux__)
/* Lookup tty name attached to stdin via libc. */
tty_libc = ttyname(STDIN_FILENO);
#endif
/* Compare libc and kernel ttys. */
if (match_ttys(tty_libc, tty_sudo) == 0) {
if (verbose)
printf("%s: OK (%s)\n", getprogname(), tty_sudo ? tty_sudo : "none");
} else if (tty_libc == NULL) {
if (verbose)
printf("%s: SKIP (%s)\n", getprogname(), tty_sudo ? tty_sudo : "none");
ntests = 0;
} else {
printf("%s: FAIL %s (sudo) vs. %s (libc)\n", getprogname(),
tty_sudo ? tty_sudo : "none", tty_libc ? tty_libc : "none");
errors++;
}
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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