diff options
Diffstat (limited to 'sysdeps/mach/hurd/setpgid.c')
-rw-r--r-- | sysdeps/mach/hurd/setpgid.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/setpgid.c b/sysdeps/mach/hurd/setpgid.c new file mode 100644 index 0000000..7c74ef8 --- /dev/null +++ b/sysdeps/mach/hurd/setpgid.c @@ -0,0 +1,57 @@ +/* Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <ansidecl.h> +#include <errno.h> +#include <unistd.h> +#include <hurd.h> +#include <hurd/port.h> + +/* Set the process group ID of the process matching PID to PGID. + If PID is zero, the current process's process group ID is set. + If PGID is zero, the process ID of the process is used. */ +int +DEFUN(__setpgid, (pid, pgid), pid_t pid AND pid_t pgid) +{ + error_t err; + unsigned int stamp; + + stamp = _hurd_pids_changed_stamp; /* Atomic fetch. */ + + if (err = __USEPORT (PROC, __proc_setpgrp (port, pid, pgid))) + return __hurd_fail (err); + + if (pid == 0 || pid == _hurd_pid) + /* Synchronize with the signal thread to make sure we have + received and processed proc_newids before returning to the user. */ + while (_hurd_pids_changed_stamp == stamp) + { +#ifdef noteven + /* XXX we have no need for a mutex, but cthreads demands one. */ + __condition_wait (&_hurd_pids_changed_sync, NULL); +#else + __swtch_pri(0); +#endif + } + + return 0; + +} + +weak_alias (__setpgid, setpgid) +weak_alias (__setpgid, setpgrp) |