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Diffstat (limited to 'cpukit/libcsupport/src/ttyname.c')
-rw-r--r-- | cpukit/libcsupport/src/ttyname.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/cpukit/libcsupport/src/ttyname.c b/cpukit/libcsupport/src/ttyname.c new file mode 100644 index 0000000000..ed0b5cbdc1 --- /dev/null +++ b/cpukit/libcsupport/src/ttyname.c @@ -0,0 +1,118 @@ +/* + * 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. + */ + +/* + * $Id$ + */ + +#if HAVE_CONFIG_H +#include "config.h" +#endif + +#ifndef HAVE_TTYNAME + +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <dirent.h> +#include <termios.h> +#include <unistd.h> +#include <string.h> +#include <paths.h> +#include <_syslist.h> +#include <errno.h> + +#include <rtems/libio_.h> +#include <rtems/seterr.h> + +static char ttyname_buf[sizeof (_PATH_DEV) + MAXNAMLEN]; + +/* + * ttyname_r() - POSIX 1003.1b 4.7.2 - Demetermine Terminal Device Name + */ +int ttyname_r( + int fd, + char *name, + size_t 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) + rtems_set_errno_and_return_minus_one(EBADF); + + /* Must be a character device. */ + if (fstat (fd, &sb) || !S_ISCHR (sb.st_mode)) + rtems_set_errno_and_return_minus_one(EBADF); + + if ((dp = opendir (_PATH_DEV)) == NULL) + rtems_set_errno_and_return_minus_one(EBADF); + + /* Place the base directory in the path. */ + strncpy (name, _PATH_DEV, namesize); + + 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; + rval = name; + break; + } + (void) closedir (dp); + return 0; +} + +/* + * ttyname() - POSIX 1003.1b 4.7.2 - Determine Terminal Device Name + */ + +char *ttyname( + int fd +) +{ + if ( !ttyname_r( fd, ttyname_buf, sizeof(ttyname_buf) ) ) + return ttyname_buf; + return NULL; +} + +#endif |