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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd 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.
systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <sys/socket.h>
#include <poll.h>
#include <sys/types.h>
#include <assert.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/un.h>
#include <sys/stat.h>
#include <sys/signalfd.h>
#include <getopt.h>
#include <stddef.h>
#include "log.h"
#include "macro.h"
#include "util.h"
static int send_on_socket(int fd, const char *socket_name, const void *packet, size_t size) {
union {
struct sockaddr sa;
struct sockaddr_un un;
} sa = {
.un.sun_family = AF_UNIX,
};
assert(fd >= 0);
assert(socket_name);
assert(packet);
strncpy(sa.un.sun_path, socket_name, sizeof(sa.un.sun_path));
if (sendto(fd, packet, size, MSG_NOSIGNAL, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(socket_name)) < 0)
return log_error_errno(errno, "Failed to send: %m");
return 0;
}
int main(int argc, char *argv[]) {
int fd = -1, r = EXIT_FAILURE;
char packet[LINE_MAX];
size_t length;
log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
if (argc != 3) {
log_error("Wrong number of arguments.");
goto finish;
}
if (streq(argv[1], "1")) {
packet[0] = '+';
if (!fgets(packet+1, sizeof(packet)-1, stdin)) {
log_error_errno(errno, "Failed to read password: %m");
goto finish;
}
truncate_nl(packet+1);
length = 1 + strlen(packet+1) + 1;
} else if (streq(argv[1], "0")) {
packet[0] = '-';
length = 1;
} else {
log_error("Invalid first argument %s", argv[1]);
goto finish;
}
fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
if (fd < 0) {
log_error_errno(errno, "socket() failed: %m");
goto finish;
}
if (send_on_socket(fd, argv[2], packet, length) < 0)
goto finish;
r = EXIT_SUCCESS;
finish:
safe_close(fd);
return r;
}
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