mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-21 01:12:26 +08:00
93 lines
3.0 KiB
C
93 lines
3.0 KiB
C
/* Copyright (C) 1991-2013 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 Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <sys/types.h>
|
|
#include <signal.h>
|
|
#include <hurd.h>
|
|
#include <hurd/port.h>
|
|
#include <hurd/signal.h>
|
|
#include <hurd/msg.h>
|
|
|
|
/* Send a `sig_post' RPC to process number PID. If PID is zero,
|
|
send the message to all processes in the current process's process group.
|
|
If PID is < -1, send SIG to all processes in process group - PID.
|
|
SIG and REFPORT are passed along in the request message. */
|
|
error_t
|
|
_hurd_sig_post (pid_t pid, int sig, mach_port_t arg_refport)
|
|
{
|
|
int delivered = 0; /* Set when we deliver any signal. */
|
|
error_t err;
|
|
mach_port_t proc;
|
|
struct hurd_userlink ulink;
|
|
|
|
inline void kill_pid (pid_t pid) /* Kill one PID. */
|
|
{
|
|
err = HURD_MSGPORT_RPC (__proc_getmsgport (proc, pid, &msgport),
|
|
(refport = arg_refport, 0), 0,
|
|
/* If no message port we cannot send signals. */
|
|
msgport == MACH_PORT_NULL ? EPERM :
|
|
__msg_sig_post (msgport, sig, 0, refport));
|
|
if (! err)
|
|
delivered = 1;
|
|
}
|
|
|
|
proc = _hurd_port_get (&_hurd_ports[INIT_PORT_PROC], &ulink);
|
|
|
|
if (pid <= 0)
|
|
{
|
|
/* Send SIG to each process in pgrp (- PID). */
|
|
mach_msg_type_number_t npids = 10, i;
|
|
pid_t pidsbuf[10], *pids = pidsbuf;
|
|
|
|
err = __proc_getpgrppids (proc, - pid, &pids, &npids);
|
|
if (!err)
|
|
{
|
|
int self = 0;
|
|
for (i = 0; i < npids; ++i)
|
|
if (pids[i] == _hurd_pid)
|
|
/* We must do ourselves last so we are not suspended
|
|
and fail to suspend the other processes in the pgrp. */
|
|
self = 1;
|
|
else
|
|
{
|
|
kill_pid (pids[i]);
|
|
if (err == ESRCH)
|
|
/* The process died already. Ignore it. */
|
|
err = 0;
|
|
}
|
|
if (pids != pidsbuf)
|
|
__vm_deallocate (__mach_task_self (),
|
|
(vm_address_t) pids, npids * sizeof (pids[0]));
|
|
|
|
if (self)
|
|
kill_pid (_hurd_pid);
|
|
}
|
|
}
|
|
else
|
|
kill_pid (pid);
|
|
|
|
_hurd_port_free (&_hurd_ports[INIT_PORT_PROC], &ulink, proc);
|
|
|
|
/* If we delivered no signals, but ERR is clear, this must mean that
|
|
every kill_pid call failed with ESRCH, meaning all the processes in
|
|
the pgrp died between proc_getpgrppids and kill_pid; in that case we
|
|
fail with ESRCH. */
|
|
return delivered ? 0 : err ?: ESRCH;
|
|
}
|
|
weak_alias (_hurd_sig_post, hurd_sig_post)
|