2 * Copyright (c) 2013 Todd C. Miller <Todd.Miller@courtesan.com>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 #include <sys/types.h>
28 #endif /* STDC_HEADERS */
30 # if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
34 #endif /* HAVE_STRING_H */
37 #endif /* HAVE_STRINGS_H */
45 __dso_public int main(int argc, char *argv[]);
47 extern char *get_process_ttyname(void);
50 main(int argc, char *argv[])
52 char *tty_libc, *tty_sudo;
55 #if !defined(HAVE_GETPROGNAME) && !defined(HAVE___PROGNAME)
56 setprogname(argc > 0 ? argv[0] : "check_ttyname");
59 /* Lookup tty name via libc. */
60 if ((tty_libc = ttyname(STDIN_FILENO)) == NULL &&
61 (tty_libc = ttyname(STDOUT_FILENO)) == NULL &&
62 (tty_libc = ttyname(STDERR_FILENO)) == NULL)
64 tty_libc = estrdup(tty_libc);
66 /* Lookup tty name via sudo (using kernel info if possible). */
67 if ((tty_sudo = get_process_ttyname()) == NULL)
68 tty_sudo = estrdup("none");
70 if (strcmp(tty_libc, tty_sudo) == 0) {
71 printf("%s: OK (%s)\n", getprogname(), tty_sudo);
73 printf("%s: FAIL %s (sudo) vs. %s (libc)\n", getprogname(),