diff options
Diffstat (limited to 'mit-pthreads/gen/ttyname.c')
| -rw-r--r-- | mit-pthreads/gen/ttyname.c | 147 |
1 files changed, 0 insertions, 147 deletions
diff --git a/mit-pthreads/gen/ttyname.c b/mit-pthreads/gen/ttyname.c deleted file mode 100644 index b7a04485f79..00000000000 --- a/mit-pthreads/gen/ttyname.c +++ /dev/null @@ -1,147 +0,0 @@ -/* - * Copyright (c) 1988 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 5.10 (Berkeley) 5/6/91"; -#endif /* LIBC_SCCS and not lint */ - -#include "config.h" -#include <pthread.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <dirent.h> -#include <unistd.h> -#include <string.h> -#include <stdlib.h> - -static pthread_mutex_t ttyname_lock = PTHREAD_MUTEX_INITIALIZER; -static pthread_key_t ttyname_key; -static int ttyname_init = 0; -extern void free(); - -char * __ttyname_r_basic(int fd, char * buf, size_t len) -{ - register struct dirent *dirp; - register DIR *dp; - struct stat dsb; - struct stat sb; - char * rval; - int minlen; - - rval = NULL; - - /* Must be a terminal. */ - if (! isatty_basic(fd)) - return(rval); - /* Must be a character device. */ - if (machdep_sys_fstat(fd, &sb) || !S_ISCHR(sb.st_mode)) - return(rval); - /* Must have enough room */ - if (len <= sizeof(_PATH_PTY)) - return(rval); - - if ((dp = opendir(_PATH_PTY)) != NULL) { - memcpy(buf, _PATH_PTY, sizeof(_PATH_PTY)); - for (rval = NULL; dirp = readdir(dp);) { - if (dirp->d_fileno != sb.st_ino) - continue; - minlen = (len - (sizeof(_PATH_PTY) - 1)) < (dirp->d_namlen + 1) ? - (len - (sizeof(_PATH_PTY) - 1)) : (dirp->d_namlen + 1); - memcpy (buf + sizeof(_PATH_PTY) - 1, dirp->d_name, minlen); - if (stat(buf, &dsb) || sb.st_dev != dsb.st_dev || - sb.st_ino != dsb.st_ino) - continue; - rval = buf; - break; - } - (void)closedir(dp); - } - return(rval); -} - -char * __ttyname_basic(int fd) -{ - char *buf; - - pthread_mutex_lock (&ttyname_lock); - if (ttyname_init == 0) { - if (pthread_key_create(&ttyname_key, free)) { - pthread_mutex_unlock (&ttyname_lock); - 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_PTY) + MAXNAMLEN)) { - if (pthread_setspecific(ttyname_key, buf) != OK) { - free(buf); - return(NULL); - } - } else { - return(NULL); - } - } - return(__ttyname_r_basic(fd, buf, sizeof(_PATH_PTY) + MAXNAMLEN)); -} - -char * ttyname_r(int fd, char * buf, size_t len) -{ - char * ret; - - if (fd_lock(fd, FD_READ) == OK) { - ret = __ttyname_r_basic(fd_table[fd]->fd.i, buf, len); - fd_unlock(fd, FD_READ); - } else { - ret = NULL; - } - return(ret); -} - -char * ttyname(int fd) -{ - char * ret; - - if (fd_lock(fd, FD_READ) == OK) { - ret = __ttyname_basic(fd_table[fd]->fd.i); - fd_unlock(fd, FD_READ); - } else { - ret = NULL; - } - return(ret); -} - - |