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glibc  2.9
ttyname_r.c
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00001 /* Copyright (C) 1994, 95, 96, 98 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <errno.h>
00020 #include <string.h>
00021 #include <unistd.h>
00022 #include <hurd.h>
00023 #include <hurd/term.h>
00024 #include <hurd/fd.h>
00025 
00026 /* Store at most BUFLEN characters of the pathname of the terminal FD is
00027    open on in BUF.  Return 0 on success, -1 otherwise.  */
00028 int
00029 __ttyname_r (int fd, char *buf, size_t buflen)
00030 {
00031   error_t err;
00032   char nodename[1024];      /* XXX */
00033   size_t len;
00034 
00035   nodename[0] = '\0';
00036   if (err = HURD_DPORT_USE (fd, __term_get_nodename (port, nodename)))
00037     return __hurd_dfail (fd, err), -1;
00038 
00039   len = strlen (nodename) + 1;
00040   if (len > buflen)
00041     {
00042       errno = EINVAL;
00043       return -1;
00044     }
00045 
00046   memcpy (buf, nodename, len);
00047   return 0;
00048 }
00049 
00050 weak_alias (__ttyname_r, ttyname_r)