.
[glibc/history.git] / hurd / hurdkill.c
blobe6336906915882b1d0267419a1a437e105533e9d
1 /* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #include <errno.h>
20 #include <sys/types.h>
21 #include <signal.h>
22 #include <hurd.h>
23 #include <hurd/port.h>
24 #include <hurd/signal.h>
25 #include <hurd/msg.h>
27 /* Send a `sig_post' RPC to process number PID. If PID is zero,
28 send the message to all processes in the current process's process group.
29 If PID is < -1, send SIG to all processes in process group - PID.
30 SIG and REFPORT are passed along in the request message. */
31 error_t
32 _hurd_sig_post (pid_t pid, int sig, mach_port_t arg_refport)
34 int delivered = 0; /* Set when we deliver any signal. */
35 error_t err;
36 mach_port_t proc;
37 struct hurd_userlink ulink;
39 inline void kill_pid (pid_t pid) /* Kill one PID. */
41 err = HURD_MSGPORT_RPC (__proc_getmsgport (proc, pid, &msgport),
42 (refport = arg_refport, 0), 0,
43 /* If no message port we cannot send signals. */
44 msgport == MACH_PORT_NULL ? EPERM :
45 __msg_sig_post (msgport, sig, 0, refport));
46 if (! err)
47 delivered = 1;
50 proc = _hurd_port_get (&_hurd_ports[INIT_PORT_PROC], &ulink);
52 if (pid <= 0)
54 /* Send SIG to each process in pgrp (- PID). */
55 mach_msg_type_number_t npids = 10, i;
56 pid_t pidsbuf[10], *pids = pidsbuf;
58 err = __proc_getpgrppids (proc, - pid, &pids, &npids);
59 if (!err)
61 int self = 0;
62 for (i = 0; i < npids; ++i)
63 if (pids[i] == _hurd_pid)
64 /* We must do ourselves last so we are not suspended
65 and fail to suspend the other processes in the pgrp. */
66 self = 1;
67 else
69 kill_pid (pids[i]);
70 if (err == ESRCH)
71 /* The process died already. Ignore it. */
72 err = 0;
74 if (pids != pidsbuf)
75 __vm_deallocate (__mach_task_self (),
76 (vm_address_t) pids, npids * sizeof (pids[0]));
78 if (self)
79 kill_pid (_hurd_pid);
82 else
83 kill_pid (pid);
85 _hurd_port_free (&_hurd_ports[INIT_PORT_PROC], &ulink, proc);
87 /* If we delivered no signals, but ERR is clear, this must mean that
88 every kill_pid call failed with ESRCH, meaning all the processes in
89 the pgrp died between proc_getpgrppids and kill_pid; in that case we
90 fail with ESRCH. */
91 return delivered ? 0 : err ?: ESRCH;
93 weak_alias (_hurd_sig_post, hurd_sig_post)