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[/] [openrisc/] [tags/] [gnu-src/] [newlib-1.18.0/] [newlib-1.18.0-or32-1.0rc1/] [newlib/] [libc/] [unix/] [ttyname_r.c] - Rev 345
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#ifndef _NO_TTYNAME /* * 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. * 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. */ #include "ttyname.h" #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <dirent.h> #include <unistd.h> #include <string.h> #include <paths.h> #include <_syslist.h> #include <errno.h> /* * ttyname_r() - POSIX 1003.1b 4.7.2 - Determine Terminal Device Name */ int _DEFUN( ttyname_r,(fd, name, namesize), int fd _AND char *name _AND size_t namesize) { struct stat sb; struct dirent *dirp; DIR *dp; struct stat dsb; char buf[TTYNAME_BUFSIZE]; /* Must be a terminal. */ if (!isatty(fd)) return ENOTTY; /* Must be a character device. */ if (fstat (fd, &sb) || !S_ISCHR (sb.st_mode)) return ENOTTY; if ((dp = opendir (_PATH_DEV)) == NULL) return EBADF; strcpy(buf, _PATH_DEV); while ((dirp = readdir (dp)) != NULL) { if (dirp->d_ino != sb.st_ino) continue; strcpy (buf + sizeof (_PATH_DEV) - 1, dirp->d_name); if (stat (buf, &dsb) || sb.st_dev != dsb.st_dev || sb.st_ino != dsb.st_ino) continue; (void) closedir (dp); if(strlen(buf) < namesize) /* < to account for terminating null */ { strcpy(name, buf); return 0; } else { return ERANGE; } } (void) closedir (dp); return EBADF; } #endif /* !_NO_TTYNAME */