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-rw-r--r--src/reply-password/reply-password.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/src/reply-password/reply-password.c b/src/reply-password/reply-password.c
new file mode 100644
index 0000000..a9aa4b8
--- /dev/null
+++ b/src/reply-password/reply-password.c
@@ -0,0 +1,81 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+#include <stddef.h>
+#include <sys/un.h>
+
+#include "alloc-util.h"
+#include "main-func.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "log.h"
+#include "macro.h"
+#include "memory-util.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;
+}
+
+static int run(int argc, char *argv[]) {
+ _cleanup_(erase_and_freep) char *packet = NULL;
+ _cleanup_close_ int fd = -1;
+ size_t length = 0;
+ int r;
+
+ log_setup();
+
+ if (argc != 3)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Wrong number of arguments.");
+
+ if (streq(argv[1], "1")) {
+ _cleanup_(erase_and_freep) char *line = NULL;
+
+ r = read_line(stdin, LONG_LINE_MAX, &line);
+ if (r < 0)
+ return log_error_errno(r, "Failed to read password: %m");
+ if (r == 0)
+ return log_error_errno(SYNTHETIC_ERRNO(EIO),
+ "Got EOF while reading password.");
+
+ packet = strjoin("+", line);
+ if (!packet)
+ return log_oom();
+
+ length = 1 + strlen(line) + 1;
+
+ } else if (streq(argv[1], "0")) {
+ packet = strdup("-");
+ if (!packet)
+ return log_oom();
+
+ length = 1;
+
+ } else
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Invalid first argument %s", argv[1]);
+
+ fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
+ if (fd < 0)
+ return log_error_errno(errno, "socket() failed: %m");
+
+ return send_on_socket(fd, argv[2], packet, length);
+}
+
+DEFINE_MAIN_FUNCTION(run);