kc3-lang/gnulib/lib/ptsname_r.c

• Show log

  Commit

• Hash : 1602f0af
  Author :
  Date : 2012-01-01T10:04:58
  

  maint: update all copyright year number ranges
  
  Run "make update-copyright".
  

Download

• lib/ptsname_r.c

• /* Determine name of the slave side of a pseudo-terminal.
     Copyright (C) 1998, 2002, 2010-2012 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  #include <stdlib.h>
  
  #include <errno.h>
  #include <string.h>
  #include <sys/stat.h>
  #include <unistd.h>
  
  #ifdef _LIBC
  # include <paths.h>
  #else
  # ifndef _PATH_TTY
  #  define _PATH_TTY "/dev/tty"
  # endif
  # ifndef _PATH_DEV
  #  define _PATH_DEV "/dev/"
  # endif
  
  # define __set_errno(e) errno = (e)
  # define __isatty isatty
  # define __stat stat
  # define __ttyname_r ttyname_r
  # define __ptsname_r ptsname_r
  
  #endif
  
  
  /* Store at most BUFLEN characters of the pathname of the slave pseudo
     terminal associated with the master FD is open on in BUF.
     Return 0 on success, otherwise an error number.  */
  int
  __ptsname_r (int fd, char *buf, size_t buflen)
  {
    int save_errno = errno;
    int err;
    struct stat st;
  
    if (buf == NULL)
      {
        __set_errno (EINVAL);
        return EINVAL;
      }
  
    if (!__isatty (fd))
      /* We rely on isatty to set errno properly (i.e. EBADF or ENOTTY).  */
      return errno;
  
    if (buflen < strlen (_PATH_TTY) + 3)
      {
        __set_errno (ERANGE);
        return ERANGE;
      }
  
    err = __ttyname_r (fd, buf, buflen);
    if (err != 0)
      {
        __set_errno (err);
        return errno;
      }
  
    buf[sizeof (_PATH_DEV) - 1] = 't';
  
    if (__stat (buf, &st) < 0)
      return errno;
  
    __set_errno (save_errno);
    return 0;
  }
  

Download