110 lines
3.0 KiB
C
110 lines
3.0 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/poll.h>
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#include <sys/types.h>
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#include <assert.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/un.h>
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#include <sys/stat.h>
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#include <sys/signalfd.h>
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#include <getopt.h>
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#include <stddef.h>
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#include "log.h"
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#include "macro.h"
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#include "util.h"
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static int send_on_socket(int fd, const char *socket_name, const void *packet, size_t size) {
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union {
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struct sockaddr sa;
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struct sockaddr_un un;
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} sa;
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assert(fd >= 0);
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assert(socket_name);
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assert(packet);
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zero(sa);
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sa.un.sun_family = AF_UNIX;
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strncpy(sa.un.sun_path, socket_name, sizeof(sa.un.sun_path));
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if (sendto(fd, packet, size, MSG_NOSIGNAL, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(socket_name)) < 0) {
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log_error("Failed to send: %m");
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return -1;
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}
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return 0;
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}
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int main(int argc, char *argv[]) {
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int fd = -1, r = EXIT_FAILURE;
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char packet[LINE_MAX];
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size_t length;
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log_set_target(LOG_TARGET_AUTO);
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log_parse_environment();
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log_open();
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if (argc != 3) {
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log_error("Wrong number of arguments.");
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goto finish;
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}
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if (streq(argv[1], "1")) {
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packet[0] = '+';
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if (!fgets(packet+1, sizeof(packet)-1, stdin)) {
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log_error("Failed to read password: %m");
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goto finish;
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}
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truncate_nl(packet+1);
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length = 1 + strlen(packet+1) + 1;
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} else if (streq(argv[1], "0")) {
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packet[0] = '-';
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length = 1;
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} else {
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log_error("Invalid first argument %s", argv[1]);
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goto finish;
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}
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if ((fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0)) < 0) {
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log_error("socket() failed: %m");
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goto finish;
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}
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if (send_on_socket(fd, argv[2], packet, length) < 0)
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goto finish;
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r = EXIT_SUCCESS;
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finish:
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if (fd >= 0)
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close_nointr_nofail(fd);
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return r;
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}
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