mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-27 03:41:23 +08:00
107 lines
3.5 KiB
C
107 lines
3.5 KiB
C
/* Copyright (C) 1991, 1992, 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 <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 signal SIG to process number PID. If PID is zero,
|
|
send SIG to all processes in the current process's process group.
|
|
If PID is < -1, send SIG to all processes in process group - PID. */
|
|
int
|
|
__kill (pid_t pid, int sig)
|
|
{
|
|
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. */
|
|
{
|
|
/* SIGKILL is not delivered as a normal signal.
|
|
Sending SIGKILL to a process means to terminate its task. */
|
|
if (sig == SIGKILL)
|
|
/* Fetch the process's task port and terminate the task. We
|
|
loop in case the process execs and changes its task port.
|
|
If the old task port dies after we fetch it but before we
|
|
send the RPC, we get MACH_SEND_INVALID_DEST; if it dies
|
|
after we send the RPC request but before it is serviced, we
|
|
get MIG_SERVER_DIED. */
|
|
do
|
|
{
|
|
task_t refport;
|
|
err = __proc_pid2task (proc, pid, &refport);
|
|
if (!err)
|
|
{
|
|
err = __task_terminate (refport);
|
|
__mach_port_deallocate (__mach_task_self (), refport);
|
|
}
|
|
} while (err == MACH_SEND_INVALID_DEST ||
|
|
err == MIG_SERVER_DIED);
|
|
else
|
|
err = HURD_MSGPORT_RPC (__proc_getmsgport (proc, pid, &msgport),
|
|
__proc_pid2task (proc, pid, &refport) ?
|
|
__proc_getsidport (proc, &refport) : 0, 1,
|
|
/* If no msgport, we cannot send a signal. */
|
|
msgport == MACH_PORT_NULL ? EPERM :
|
|
__msg_sig_post (msgport, sig, 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). */
|
|
pid_t pidbuf[10], *pids = pidbuf;
|
|
mach_msg_type_number_t i, npids = sizeof (pidbuf) / sizeof (pidbuf[0]);
|
|
|
|
err = __proc_getpgrppids (proc, - pid, &pids, &npids);
|
|
if (!err)
|
|
{
|
|
for (i = 0; i < npids; ++i)
|
|
{
|
|
kill_pid (pids[i]);
|
|
if (err == ESRCH)
|
|
/* The process died already. Ignore it. */
|
|
err = 0;
|
|
}
|
|
if (pids != pidbuf)
|
|
__vm_deallocate (__mach_task_self (),
|
|
(vm_address_t) pids, npids * sizeof (pids[0]));
|
|
}
|
|
}
|
|
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 : __hurd_fail (err ?: ESRCH);
|
|
}
|
|
|
|
weak_alias (__kill, kill)
|