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/* SPDX-License-Identifier: LGPL-2.1+ */
#include <errno.h>
#include <stddef.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/un.h>
#include "alloc-util.h"
#include "fd-util.h"
#include "fileio.h"
#include "log.h"
#include "macro.h"
#include "socket-util.h"
#include "string-util.h"
#include "util.h"
static int send_on_socket(int fd, const char *socket_name, const void *packet, size_t size) {
union sockaddr_union sa = {};
int salen;
assert(fd >= 0);
assert(socket_name);
assert(packet);
salen = sockaddr_un_set_path(&sa.un, socket_name);
if (salen < 0)
return log_error_errno(salen, "Specified socket path for AF_UNIX socket invalid, refusing: %s", socket_name);
if (sendto(fd, packet, size, MSG_NOSIGNAL, &sa.sa, salen) < 0)
return log_error_errno(errno, "Failed to send: %m");
return 0;
}
int main(int argc, char *argv[]) {
_cleanup_free_ char *packet = NULL;
_cleanup_close_ int fd = -1;
size_t length = 0;
int r;
log_setup_service();
if (argc != 3) {
log_error("Wrong number of arguments.");
return EXIT_FAILURE;
}
if (streq(argv[1], "1")) {
_cleanup_string_free_erase_ char *line = NULL;
r = read_line(stdin, LONG_LINE_MAX, &line);
if (r < 0) {
log_error_errno(r, "Failed to read password: %m");
goto finish;
}
if (r == 0) {
log_error("Got EOF while reading password.");
r = -EIO;
goto finish;
}
packet = strjoin("+", line);
if (!packet) {
r = log_oom();
goto finish;
}
length = 1 + strlen(line) + 1;
} else if (streq(argv[1], "0")) {
packet = strdup("-");
if (!packet) {
r = log_oom();
goto finish;
}
length = 1;
} else {
log_error("Invalid first argument %s", argv[1]);
r = -EINVAL;
goto finish;
}
fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
if (fd < 0) {
r = log_error_errno(errno, "socket() failed: %m");
goto finish;
}
r = send_on_socket(fd, argv[2], packet, length);
finish:
explicit_bzero_safe(packet, length);
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
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