/* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 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)