kc3-lang/gnulib/lib/tcgetsid.c

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• Hash : 32a72f45
  Author :
  Date : 2023-01-01T01:14:21
  

  maint: run 'make update-copyright'
  

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• lib/tcgetsid.c

• /* Determine the session ID of the controlling terminal of the current process.
     Copyright (C) 2010-2023 Free Software Foundation, Inc.
  
     This file is free software: you can redistribute it and/or modify
     it under the terms of the GNU Lesser General Public License as
     published by the Free Software Foundation, either version 3 of the
     License, or (at your option) any later version.
  
     This file 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 Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  #define USE_OLD_TTY /* needed on OpenBSD 4.5, so that TIOCGSID gets defined */
  
  /* Specification.  */
  #include <termios.h>
  
  #include <errno.h>
  #include <sys/ioctl.h>
  
  pid_t
  tcgetsid (int fd)
  {
  #ifdef TIOCGSID /* Mac OS X, OpenBSD */
    int sid;
  
    if (ioctl (fd, TIOCGSID, &sid) < 0)
      return -1; /* errno is set here */
  
    return sid;
  #else /* FreeBSD, Cygwin, mingw */
    errno = ENOSYS;
    return -1;
  #endif
  }
  

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