sysdeps/mach/hurd/getsid.c

   1 /* getsid -- Return session ID of a process.  Hurd version.
   2    Copyright (C) 1995-2014 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <sys/types.h>
  20 #include <unistd.h>
  21 #include <errno.h>
  22 #include <hurd.h>
  23
  24 pid_t
  25 getsid (pid_t pid)
  26 {
  27   error_t err;
  28   pid_t sid;
  29
  30   if (pid == 0)
  31     pid = _hurd_pid;
  32
  33   err = __USEPORT (PROC, __proc_getsid (port, pid, &sid));
  34   if (err)
  35     return (pid_t) __hurd_fail (err);
  36   return sid;
  37 }
  38 libc_hidden_def (getsid)