+++ /dev/null
-/*
- * Copyright (c) 1988, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#if defined(LIBC_SCCS) && !defined(lint)
-static char sccsid[] = "@(#)ttyname.c 8.2 (Berkeley) 1/27/94";
-#endif /* LIBC_SCCS and not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/gen/ttyname.c,v 1.16 2004/01/06 18:26:14 nectar Exp $");
-
-#include "namespace.h"
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <dirent.h>
-#include <stdlib.h>
-#include <termios.h>
-#include <unistd.h>
-#include <string.h>
-#include <paths.h>
-#include <pthread.h>
-#include <errno.h>
-#include "un-namespace.h"
-
-#include "libc_private.h"
-
-#ifndef BUILDING_VARIANT
-static pthread_once_t ttyname_buf_control = PTHREAD_ONCE_INIT;
-static char *buf = NULL;
-static char *ttyname_threaded(int fd);
-static char *ttyname_unthreaded(int fd);
-
-static pthread_mutex_t ttyname_lock = PTHREAD_MUTEX_INITIALIZER;
-static pthread_key_t ttyname_key;
-static int ttyname_init = 0;
-
-char *
-ttyname(int fd)
-{
- char *ret;
-
- if (__isthreaded == 0)
- ret = ttyname_unthreaded(fd);
- else
- ret = ttyname_threaded(fd);
- return (ret);
-}
-#endif /* !BUILDING_VARIANT */
-
-#if __DARWIN_UNIX03
-int
-#else /* !__DARWIN_UNIX03 */
-char *
-#endif /* __DARWIN_UNIX03 */
-ttyname_r(int fd, char *thrbuf, size_t len)
-{
- struct stat sb;
-
-#if __DARWIN_UNIX03
- if (_fstat(fd, &sb) < 0)
- return (EBADF);
- /* Must be a terminal. */
- if (!isatty(fd))
- return (ENOTTY);
- /* Must be a character device. */
- if (!S_ISCHR(sb.st_mode))
- return (ENOTTY);
- /* Must have enough room */
- if (len <= sizeof(_PATH_DEV))
- return (ERANGE);
-#else /* !__DARWIN_UNIX03 */
- /* Must be a terminal. */
- if (!isatty(fd))
- return (NULL);
- /* Must be a character device. */
- if (_fstat(fd, &sb))
- return (NULL);
- if (!S_ISCHR(sb.st_mode)) {
- errno = ENOTTY;
- return (NULL);
- }
- /* Must have enough room */
- if (len <= sizeof(_PATH_DEV)) {
- errno = ERANGE;
- return (NULL);
- }
-#endif /* __DARWIN_UNIX03 */
-
- strlcpy(thrbuf, _PATH_DEV, len);
- if (devname_r(sb.st_rdev, S_IFCHR,
- thrbuf + strlen(thrbuf), len - strlen(thrbuf)) == NULL)
-#if __DARWIN_UNIX03
- return (ERANGE);
- return (0);
-#else /* !__DARWIN_UNIX03 */
- {
- errno = ERANGE;
- return (NULL);
- }
- return (thrbuf);
-#endif /* __DARWIN_UNIX03 */
-}
-
-#ifndef BUILDING_VARIANT
-static char *
-ttyname_threaded(int fd)
-{
- char *buf;
-
- if (ttyname_init == 0) {
- _pthread_mutex_lock(&ttyname_lock);
- if (ttyname_init == 0) {
- /* __PTK_LIBC_TTYNAME_KEY */
- ttyname_key = __LIBC_PTHREAD_KEY_TTYNAME;
- if (pthread_key_init_np(ttyname_key, free)) {
- int save = errno;
- _pthread_mutex_unlock(&ttyname_lock);
- errno = save;
- return (NULL);
- }
- ttyname_init = 1;
- }
- _pthread_mutex_unlock(&ttyname_lock);
- }
-
- /* Must have thread specific data field to put data */
- if ((buf = _pthread_getspecific(ttyname_key)) == NULL) {
- if ((buf = malloc(sizeof(_PATH_DEV) + MAXNAMLEN)) != NULL) {
- if (_pthread_setspecific(ttyname_key, buf) != 0) {
- int save = errno;
- free(buf);
- errno = save;
- return (NULL);
- }
- } else {
- return (NULL);
- }
- }
-#if __DARWIN_UNIX03
- return (ttyname_r(fd, buf, sizeof(_PATH_DEV) + MAXNAMLEN) == 0 ? buf : NULL);
-#else /* !__DARWIN_UNIX03 */
- return (ttyname_r(fd, buf, sizeof(_PATH_DEV) + MAXNAMLEN));
-#endif /* __DARWIN_UNIX03 */
-}
-
-static void
-ttyname_buf_allocate(void)
-{
- buf = malloc(sizeof(_PATH_DEV) + MAXNAMLEN);
-}
-
-static char *
-ttyname_unthreaded(int fd)
-{
- struct stat sb;
- struct termios ttyb;
-
- /* Must be a terminal. */
- if (tcgetattr(fd, &ttyb) < 0)
- return (NULL);
- /* Must be a character device. */
- if (_fstat(fd, &sb))
- return (NULL);
- if (!S_ISCHR(sb.st_mode)) {
- errno = ENOTTY;
- return (NULL);
- }
-
- if (pthread_once(&ttyname_buf_control, ttyname_buf_allocate)
- || !buf) {
- errno = ENOMEM;
- return (NULL);
- }
-
- strlcpy(buf, _PATH_DEV, sizeof(_PATH_DEV) + MAXNAMLEN);
- if (devname_r(sb.st_rdev, S_IFCHR,
- buf + strlen(buf), sizeof(_PATH_DEV) + MAXNAMLEN - strlen(buf)) == NULL) {
- errno = ERANGE;
- return (NULL);
- }
- return (buf);
-}
-#endif /* !BUILDING_VARIANT */
projects / apple / libc.git / blobdiff