sysdeps/mach/hurd/ttyname_r.c

   1 /* Copyright (C) 1994, 95, 96, 98 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <errno.h>
  20 #include <string.h>
  21 #include <unistd.h>
  22 #include <hurd.h>
  23 #include <hurd/term.h>
  24 #include <hurd/fd.h>
  25
  26 /* Store at most BUFLEN characters of the pathname of the terminal FD is
  27    open on in BUF.  Return 0 on success, -1 otherwise.  */
  28 int
  29 __ttyname_r (int fd, char *buf, size_t buflen)
  30 {
  31   error_t err;
  32   char nodename[1024];  /* XXX */
  33   size_t len;
  34
  35   nodename[0] = '\0';
  36   if (err = HURD_DPORT_USE (fd, __term_get_nodename (port, nodename)))
  37     return __hurd_dfail (fd, err), -1;
  38
  39   len = strlen (nodename) + 1;
  40   if (len > buflen)
  41     {
  42       errno = EINVAL;
  43       return -1;
  44     }
  45
  46   memcpy (buf, nodename, len);
  47   return 0;
  48 }
  49
  50 weak_alias (__ttyname_r, ttyname_r)