232 lines
7.1 KiB
C
232 lines
7.1 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/poll.h>
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#include <stddef.h>
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#include "log.h"
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#include "util.h"
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#include "socket-util.h"
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#include "sd-daemon.h"
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#include "sd-bus.h"
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#include "bus-internal.h"
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#include "bus-message.h"
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int main(int argc, char *argv[]) {
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_cleanup_bus_unref_ sd_bus *a = NULL, *b = NULL;
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sd_id128_t server_id;
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bool is_unix;
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int r;
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if (argc > 1) {
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log_error("This program takes no argument.");
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return EXIT_FAILURE;
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}
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log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
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log_parse_environment();
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log_open();
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is_unix =
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sd_is_socket(STDIN_FILENO, AF_UNIX, 0, 0) > 0 &&
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sd_is_socket(STDOUT_FILENO, AF_UNIX, 0, 0) > 0;
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r = sd_bus_new(&a);
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if (r < 0) {
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log_error("Failed to allocate bus: %s", strerror(-r));
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goto finish;
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}
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r = sd_bus_set_address(a, "unix:path=/run/dbus/system_bus_socket");
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if (r < 0) {
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log_error("Failed to set address to connect to: %s", strerror(-r));
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goto finish;
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}
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r = sd_bus_negotiate_fds(a, is_unix);
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if (r < 0) {
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log_error("Failed to set FD negotiation: %s", strerror(-r));
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goto finish;
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}
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r = sd_bus_start(a);
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if (r < 0) {
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log_error("Failed to start bus client: %s", strerror(-r));
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goto finish;
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}
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r = sd_bus_get_server_id(a, &server_id);
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if (r < 0) {
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log_error("Failed to get server ID: %s", strerror(-r));
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goto finish;
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}
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r = sd_bus_new(&b);
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if (r < 0) {
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log_error("Failed to allocate bus: %s", strerror(-r));
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goto finish;
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}
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r = sd_bus_set_fd(b, STDIN_FILENO, STDOUT_FILENO);
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if (r < 0) {
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log_error("Failed to set fds: %s", strerror(-r));
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goto finish;
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}
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r = sd_bus_set_server(b, 1, server_id);
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if (r < 0) {
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log_error("Failed to set server mode: %s", strerror(-r));
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goto finish;
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}
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r = sd_bus_negotiate_fds(b, is_unix);
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if (r < 0) {
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log_error("Failed to set FD negotiation: %s", strerror(-r));
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goto finish;
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}
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r = sd_bus_set_anonymous(b, true);
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if (r < 0) {
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log_error("Failed to set anonymous authentication: %s", strerror(-r));
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goto finish;
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}
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r = sd_bus_start(b);
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if (r < 0) {
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log_error("Failed to start bus client: %s", strerror(-r));
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goto finish;
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}
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for (;;) {
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_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
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int events_a, events_b, fd;
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uint64_t timeout_a, timeout_b, t;
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struct timespec _ts, *ts;
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r = sd_bus_process(a, &m);
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if (r < 0) {
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log_error("Failed to process bus: %s", strerror(-r));
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goto finish;
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}
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if (m) {
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r = sd_bus_send(b, m, NULL);
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if (r < 0) {
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log_error("Failed to send message: %s", strerror(-r));
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goto finish;
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}
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}
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if (r > 0)
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continue;
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r = sd_bus_process(b, &m);
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if (r < 0) {
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log_error("Failed to process bus: %s", strerror(-r));
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goto finish;
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}
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if (m) {
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r = sd_bus_send(a, m, NULL);
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if (r < 0) {
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log_error("Failed to send message: %s", strerror(-r));
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goto finish;
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}
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}
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if (r > 0)
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continue;
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fd = sd_bus_get_fd(a);
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if (fd < 0) {
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log_error("Failed to get fd: %s", strerror(-r));
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goto finish;
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}
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events_a = sd_bus_get_events(a);
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if (events_a < 0) {
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log_error("Failed to get events mask: %s", strerror(-r));
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goto finish;
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}
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r = sd_bus_get_timeout(a, &timeout_a);
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if (r < 0) {
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log_error("Failed to get timeout: %s", strerror(-r));
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goto finish;
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}
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events_b = sd_bus_get_events(b);
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if (events_b < 0) {
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log_error("Failed to get events mask: %s", strerror(-r));
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goto finish;
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}
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r = sd_bus_get_timeout(b, &timeout_b);
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if (r < 0) {
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log_error("Failed to get timeout: %s", strerror(-r));
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goto finish;
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}
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t = timeout_a;
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if (t == (uint64_t) -1 || (timeout_b != (uint64_t) -1 && timeout_b < timeout_a))
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t = timeout_b;
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if (t == (uint64_t) -1)
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ts = NULL;
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else {
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usec_t nw;
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nw = now(CLOCK_MONOTONIC);
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if (t > nw)
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t -= nw;
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else
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t = 0;
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ts = timespec_store(&_ts, t);
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}
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{
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struct pollfd p[3] = {
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{.fd = fd, .events = events_a, },
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{.fd = STDIN_FILENO, .events = events_b & POLLIN, },
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{.fd = STDOUT_FILENO, .events = events_b & POLLOUT, }};
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r = ppoll(p, ELEMENTSOF(p), ts, NULL);
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}
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if (r < 0) {
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log_error("ppoll() failed: %m");
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goto finish;
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}
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}
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r = 0;
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finish:
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return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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