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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libc/] [ttyname_r.c] - Rev 846
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/* * This file was copied from newlib-1.8.2/newlib/unix/ttyname.c * and transformed into ttyname_r(). * * 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. * * $Id: ttyname_r.c,v 1.2 2001-09-27 12:01:15 chris Exp $ */ #if defined(LIBC_SCCS) && !defined(lint) static char sccsid[] = "@(#)ttyname.c 5.10 (Berkeley) 5/6/91"; #endif /* LIBC_SCCS and not lint */ #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <dirent.h> #include <termios.h> #include <unistd.h> #include <paths.h> #include <_syslist.h> #include <errno.h> #include "libio_.h" /* * ttyname_r() - POSIX 1003.1b 4.7.2 - Demetermine Terminal Device Name */ int ttyname_r( int fd, char *name, int namesize ) { struct stat sb; struct termios tty; struct dirent *dirp; DIR *dp; struct stat dsb; char *rval; /* Must be a terminal. */ if (tcgetattr (fd, &tty) < 0) set_errno_and_return_minus_one(EBADF); /* Must be a character device. */ if (_fstat (fd, &sb) || !S_ISCHR (sb.st_mode)) set_errno_and_return_minus_one(EBADF); if ((dp = opendir (_PATH_DEV)) == NULL) set_errno_and_return_minus_one(EBADF); for (rval = NULL; (dirp = readdir (dp)) != NULL ;) { if (dirp->d_ino != sb.st_ino) continue; strcpy (name + sizeof (_PATH_DEV) - 1, dirp->d_name); if (stat (name, &dsb) || sb.st_dev != dsb.st_dev || sb.st_ino != dsb.st_ino) continue; (void) closedir (dp); rval = name; break; } (void) closedir (dp); return 0; } static char buf[sizeof (_PATH_DEV) + MAXNAMLEN] = _PATH_DEV; /* * ttyname() - POSIX 1003.1b 4.7.2 - Demetermine Terminal Device Name */ char *ttyname( int fd ) { if ( !ttyname_r( fd, buf, sizeof(buf) ) ) return buf; return NULL; }
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