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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2022 Oxide Computer Company
*/
/*
* This program verifies that isatty(3C) correctly handles and sets errno for
* different cases.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <limits.h>
#include <errno.h>
#include <err.h>
#include <stdbool.h>
#include <sys/stropts.h>
#include <sys/sysmacros.h>
#include "common/openpty.c"
int
main(void)
{
int sfd, mfd;
int ret = EXIT_SUCCESS;
const int badfds[] = { 3, -1, INT_MAX, INT_MIN, 7777 };
const char *notttys[] = { "/proc/self/status", "/usr/lib/64/libc.so.1",
"/dev/zero", "/dev/tcp", "/dev/poll", "/etc/default/init" };
/*
* We start off by using closefrom() to verify that we don't have
* anything open other than the standard file descriptors, allowing us
* to pick FDs that make sense.
*/
closefrom(STDERR_FILENO + 1);
for (size_t i = 0; i < ARRAY_SIZE(badfds); i++) {
/*
* We explicitly clear errno to prove that we are setting it.
* The closefrom() will hit EBADF and we want to clear that out
* from the test (as well as any side effects below.
*/
errno = 0;
if (isatty(badfds[i]) != 0) {
warnx("TEST FAILED: isatty(%d) returned success on bad "
"fd", badfds[i]);
ret = EXIT_FAILURE;
continue;
}
if (errno != EBADF) {
int e = errno;
warnx("TEST FAILED: isatty(%d) didn't set EBADF, "
"found: %d", badfds[i], e);
ret = EXIT_FAILURE;
continue;
}
(void) printf("TEST PASSED: isatty(%d) failed with EBADF\n",
badfds[i]);
}
for (size_t i = 0; i < ARRAY_SIZE(notttys); i++) {
int fd = open(notttys[i], O_RDONLY);
int ttyret, ttyerr;
if (fd < 0) {
warn("TEST FAILED: failed to open %s", notttys[i]);
ret = EXIT_FAILURE;
continue;
}
errno = 0;
ttyret = isatty(fd);
ttyerr = errno;
(void) close(fd);
if (ttyret != 0) {
warnx("TEST FAILED: %s is somehow a tty!", notttys[i]);
ret = EXIT_FAILURE;
continue;
}
if (ttyerr != ENOTTY) {
warnx("TEST FAILED: got wrong errno for %s, expected "
"ENOTTY, found %d", notttys[i], ttyerr);
ret = EXIT_FAILURE;
continue;
}
(void) printf("TEST PASSED: %s is not a tty, errno was "
"ENOTTY\n", notttys[i]);
}
if (!openpty(&mfd, &sfd)) {
errx(EXIT_FAILURE, "TEST FAILED: failed to open a pty");
}
if (isatty(sfd) != 1) {
warnx("subsidiary PTY fd somehow isn't a TTY!");
ret = EXIT_FAILURE;
} else {
(void) printf("TEST PASSED: subsidiary PTY is a TTY\n");
}
if (isatty(mfd) != 0) {
warnx("manager PTY fd somehow is a TTY!");
ret = EXIT_FAILURE;
} else {
(void) printf("TEST PASSED: manager PTY is not a TTY\n");
}
(void) close(mfd);
(void) close(sfd);
return (ret);
}
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