src/core/killall.c

	killall.c revision 6301a98cdf26dc073f5317506c806bfa69f74cc8
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog/***
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog  This file is part of systemd.
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog  Copyright 2010 ProFUSION embedded systems
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog  systemd is free software; you can redistribute it and/or modify it
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog  under the terms of the GNU Lesser General Public License as published by
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog  the Free Software Foundation; either version 2.1 of the License, or
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog  (at your option) any later version.
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog  systemd is distributed in the hope that it will be useful, but
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog  WITHOUT ANY WARRANTY; without even the implied warranty of
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog  Lesser General Public License for more details.
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog  You should have received a copy of the GNU Lesser General Public License
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog  along with systemd; If not, see <http://www.gnu.org/licenses/>.
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog***/
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog#include <sys/wait.h>
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog#include <signal.h>
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog#include <errno.h>
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog#include <unistd.h>
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog#include "util.h"
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog#include "def.h"
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog#include "killall.h"
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog#include "set.h"
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog#define TIMEOUT_USEC (10 * USEC_PER_SEC)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskogstatic bool ignore_proc(pid_t pid) {
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        _cleanup_fclose_ FILE *f = NULL;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        char c, *p;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        size_t count;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        uid_t uid;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        int r;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        /* We are PID 1, let's not commit suicide */
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        if (pid == 1)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                return true;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        r = get_process_uid(pid, &uid);
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        if (r < 0)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                return true; /* not really, but better safe than sorry */
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        /* Non-root processes otherwise are always subject to be killed */
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        if (uid != 0)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                return false;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        p = procfs_file_alloca(pid, "cmdline");
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        f = fopen(p, "re");
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        if (!f)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                return true; /* not really, but has the desired effect */
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        count = fread(&c, 1, 1, f);
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        /* Kernel threads have an empty cmdline */
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        if (count <= 0)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                return true;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        /* Processes with argv[0][0] = '@' we ignore from the killing
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog         * spree.
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog         *
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog         * http://www.freedesktop.org/wiki/Software/systemd/RootStorageDaemons */
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        if (count == 1 && c == '@')
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                return true;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        return false;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog}
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskogstatic void wait_for_children(Set *pids, sigset_t *mask) {
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        usec_t until;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        assert(mask);
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        if (set_isempty(pids))
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                return;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        until = now(CLOCK_MONOTONIC) + TIMEOUT_USEC;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        for (;;) {
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                struct timespec ts;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                int k;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                usec_t n;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                void *p;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                Iterator i;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                /* First, let the kernel inform us about killed
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                 * children. Most processes will probably be our
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                 * children, but some are not (might be our
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                 * grandchildren instead...). */
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                for (;;) {
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        pid_t pid;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        pid = waitpid(-1, NULL, WNOHANG);
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        if (pid == 0)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                                break;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        if (pid < 0) {
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                                if (errno == ECHILD)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                                        break;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                                log_error("waitpid() failed: %m");
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                                return;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        }
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        set_remove(pids, ULONG_TO_PTR(pid));
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                }
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                /* Now explicitly check who might be remaining, who
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                 * might not be our child. */
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                SET_FOREACH(p, pids, i) {
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        /* We misuse getpgid as a check whether a
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                         * process still exists. */
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        if (getpgid((pid_t) PTR_TO_ULONG(p)) >= 0)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                                continue;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        if (errno != ESRCH)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                                continue;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        set_remove(pids, p);
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                }
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                if (set_isempty(pids))
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        return;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                n = now(CLOCK_MONOTONIC);
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                if (n >= until)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        return;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                timespec_store(&ts, until - n);
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                k = sigtimedwait(mask, NULL, &ts);
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                if (k != SIGCHLD) {
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        if (k < 0 && errno != EAGAIN) {
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                                log_error("sigtimedwait() failed: %m");
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                                return;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        }
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        if (k >= 0)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                                log_warning("sigtimedwait() returned unexpected signal.");
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                }
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        }
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog}
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskogstatic int killall(int sig, Set *pids, bool send_sighup) {
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        _cleanup_closedir_ DIR *dir = NULL;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        struct dirent *d;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        dir = opendir("/proc");
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        if (!dir)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                return -errno;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        while ((d = readdir(dir))) {
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                pid_t pid;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                if (d->d_type != DT_DIR &&
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                    d->d_type != DT_UNKNOWN)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        continue;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                if (parse_pid(d->d_name, &pid) < 0)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        continue;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                if (ignore_proc(pid))
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        continue;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                if (sig == SIGKILL) {
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        _cleanup_free_ char *s;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        get_process_comm(pid, &s);
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        log_notice("Sending SIGKILL to PID %lu (%s).", (unsigned long) pid, strna(s));
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                }
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                if (kill(pid, sig) >= 0) {
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        if (pids)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                                set_put(pids, ULONG_TO_PTR((unsigned long) pid));
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                } else if (errno != ENOENT)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        log_warning("Could not kill %d: %m", pid);
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                if (send_sighup) {
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        /* Optionally, also send a SIGHUP signal, but
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        only if the process has a controlling
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        tty. This is useful to allow handling of
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        shells which ignore SIGTERM but react to
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        SIGHUP. We do not send this to processes that
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        have no controlling TTY since we don't want to
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        trigger reloads of daemon processes. Also we
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        make sure to only send this after SIGTERM so
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        that SIGTERM is always first in the queue. */
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                        if (get_ctty_devnr(pid, NULL) >= 0)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                                kill(pid, SIGHUP);
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                }
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        }
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        return set_size(pids);
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog}
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskogvoid broadcast_signal(int sig, bool wait_for_exit, bool send_sighup) {
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        sigset_t mask, oldmask;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        Set *pids = NULL;
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        if (wait_for_exit)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                pids = set_new(trivial_hash_func, trivial_compare_func);
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        assert_se(sigemptyset(&mask) == 0);
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        assert_se(sigaddset(&mask, SIGCHLD) == 0);
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        assert_se(sigprocmask(SIG_BLOCK, &mask, &oldmask) == 0);
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        if (kill(-1, SIGSTOP) < 0 && errno != ESRCH)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                log_warning("kill(-1, SIGSTOP) failed: %m");
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        killall(sig, pids, send_sighup);
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        if (kill(-1, SIGCONT) < 0 && errno != ESRCH)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                log_warning("kill(-1, SIGCONT) failed: %m");
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        if (wait_for_exit)
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog                wait_for_children(pids, &mask);
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog        assert_se(sigprocmask(SIG_SETMASK, &oldmask, NULL) == 0);
d9bf4f8c6c47b8620ffa1a056208eb15118b78d5Umut Tezduyar Lindskog
        set_free(pids);
}