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When comparing tty names, resolve the tty for fds 0-3 and compare

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each one instead of just using the first that resolves.
This commit is contained in:
Todd C. Miller
2014-05-07 15:25:05 -06:00
parent 4902f4e3ec
commit 9cdf7797cf
1 changed files with 26 additions and 16 deletions
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42
src/regress/ttyname/check_ttyname.c
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2013 Todd C. Miller <Todd.Miller@courtesan.com>
* Copyright (c) 2013-2014 Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@@ -50,30 +50,40 @@ extern char *get_process_ttyname(void);
int
main(int argc, char *argv[])
{
char *tty_libc, *tty_sudo;
int rval = 0;
char *cp, *tty_libc = NULL, *tty_sudo;
int fd, rval = 1;
initprogname(argc > 0 ? argv[0] : "check_ttyname");
/* Lookup tty name via libc. */
if ((tty_libc = ttyname(STDIN_FILENO)) == NULL &&
(tty_libc = ttyname(STDOUT_FILENO)) == NULL &&
(tty_libc = ttyname(STDERR_FILENO)) == NULL)
tty_libc = "none";
tty_libc = estrdup(tty_libc);
/* Lookup tty name via sudo (using kernel info if possible). */
if ((tty_sudo = get_process_ttyname()) == NULL)
tty_sudo = estrdup("none");
if (strcmp(tty_libc, "none") == 0) {
printf("%s: SKIP (%s)\n", getprogname(), tty_sudo);
} else if (strcmp(tty_libc, tty_sudo) == 0) {
printf("%s: OK (%s)\n", getprogname(), tty_sudo);
/* Lookup tty name via libc and compare to kernel tty. */
for (fd = STDERR_FILENO; fd >= STDIN_FILENO; fd--) {
cp = ttyname(fd);
if (cp != NULL) {
if (tty_libc == NULL || strcmp(cp, tty_libc) != 0) {
efree(tty_libc);
tty_libc = estrdup(cp);
}
if (tty_sudo != NULL && strcmp(tty_libc, tty_sudo) == 0) {
rval = 0;
break;
}
}
}
if (tty_libc == NULL && tty_sudo == NULL)
rval = 0;
if (rval == 0) {
printf("%s: OK (%s)\n", getprogname(), tty_sudo ? tty_sudo : "none");
} else if (tty_libc == NULL) {
printf("%s: SKIP (%s)\n", getprogname(), tty_sudo ? tty_sudo : "none");
rval = 0;
} else {
printf("%s: FAIL %s (sudo) vs. %s (libc)\n", getprogname(),
tty_sudo, tty_libc);
rval = 1;
tty_sudo ? tty_sudo : "none", tty_libc ? tty_sudo : "none");
}
efree(tty_libc);