1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include <sys/socket.h>
29 #include <sys/inotify.h>
32 #include <sys/signalfd.h>
35 #include "conf-parser.h"
36 #include "utmp-wtmp.h"
37 #include "socket-util.h"
44 } arg_action = ACTION_QUERY;
46 static bool arg_plymouth = false;
48 static int ask_password_plymouth(const char *message, usec_t until, const char *flag_file, char **_passphrase) {
49 int fd = -1, notify = -1;
50 union sockaddr_union sa;
54 struct pollfd pollfd[2];
55 char buffer[LINE_MAX];
63 if ((notify = inotify_init1(IN_CLOEXEC|IN_NONBLOCK)) < 0) {
68 if (inotify_add_watch(notify, flag_file, IN_ATTRIB /* for the link count */) < 0) {
74 if ((fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0)) < 0) {
80 sa.sa.sa_family = AF_UNIX;
81 strncpy(sa.un.sun_path+1, "/ply-boot-protocol", sizeof(sa.un.sun_path)-1);
83 if (connect(fd, &sa.sa, sizeof(sa.un)) < 0) {
88 if (asprintf(&packet, "*\002%c%s%n", (int) (strlen(message) + 1), message, &n) < 0) {
93 if ((k = loop_write(fd, packet, n+1, true)) != n+1) {
94 r = k < 0 ? (int) k : -EIO;
99 pollfd[POLL_SOCKET].fd = fd;
100 pollfd[POLL_SOCKET].events = POLLIN;
101 pollfd[POLL_INOTIFY].fd = notify;
102 pollfd[POLL_INOTIFY].events = POLLIN;
105 int sleep_for = -1, j;
110 y = now(CLOCK_MONOTONIC);
117 sleep_for = (int) ((until - y) / USEC_PER_MSEC);
121 if (access(flag_file, F_OK) < 0) {
126 if ((j = poll(pollfd, notify > 0 ? 2 : 1, sleep_for)) < 0) {
138 if (notify > 0 && pollfd[POLL_INOTIFY].revents != 0)
141 if (pollfd[POLL_SOCKET].revents == 0)
144 if ((k = read(fd, buffer + p, sizeof(buffer) - p)) <= 0) {
145 r = k < 0 ? -errno : -EIO;
154 if (buffer[0] == 5) {
155 /* No password, because UI not shown */
159 } else if (buffer[0] == 2) {
167 memcpy(&size, buffer+1, sizeof(size));
168 if (size+5 > sizeof(buffer)) {
176 if (!(s = strndup(buffer + 5, size))) {
194 close_nointr_nofail(notify);
197 close_nointr_nofail(fd);
204 static int parse_password(const char *filename, char **wall) {
205 char *socket_name = NULL, *message = NULL, *packet = NULL;
206 uint64_t not_after = 0;
210 const ConfigItem items[] = {
211 { "Socket", config_parse_string, &socket_name, "Ask" },
212 { "NotAfter", config_parse_uint64, ¬_after, "Ask" },
213 { "Message", config_parse_string, &message, "Ask" },
214 { "PID", config_parse_unsigned, &pid, "Ask" },
223 if (!(f = fopen(filename, "re"))) {
228 log_error("open(%s): %m", filename);
232 if ((r = config_parse(filename, f, NULL, items, false, NULL)) < 0) {
233 log_error("Failed to parse password file %s: %s", filename, strerror(-r));
237 if (!socket_name || not_after <= 0) {
238 log_error("Invalid password file %s", filename);
243 n = now(CLOCK_MONOTONIC);
249 if (arg_action == ACTION_LIST)
250 printf("'%s' (PID %u)\n", message, pid);
251 else if (arg_action == ACTION_WALL) {
255 "%s%sPassword entry required for \'%s\' (PID %u).\r\n"
256 "Please enter password with the systemd-tty-password-agent tool!",
258 *wall ? "\r\n\r\n" : "",
261 log_error("Out of memory");
271 struct sockaddr_un un;
275 assert(arg_action == ACTION_QUERY ||
276 arg_action == ACTION_WATCH);
278 if (access(socket_name, W_OK) < 0) {
280 if (arg_action == ACTION_QUERY)
281 log_info("Not querying '%s' (PID %u), lacking privileges.", message, pid);
288 r = ask_password_plymouth(message, not_after, filename, &password);
290 r = ask_password_tty(message, not_after, filename, &password);
293 log_error("Failed to query password: %s", strerror(-r));
297 asprintf(&packet, "+%s", password);
301 log_error("Out of memory");
306 if ((socket_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0)) < 0) {
307 log_error("socket(): %m");
313 sa.un.sun_family = AF_UNIX;
314 strncpy(sa.un.sun_path, socket_name, sizeof(sa.un.sun_path));
316 if (sendto(socket_fd, packet, strlen(packet), MSG_NOSIGNAL, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(socket_name)) < 0) {
317 log_error("Failed to send: %m");
327 close_nointr_nofail(socket_fd);
336 static int show_passwords(void) {
341 if (!(d = opendir("/dev/.systemd/ask-password"))) {
345 log_error("opendir(): %m");
349 while ((de = readdir(d))) {
354 if (de->d_type != DT_REG)
357 if (ignore_file(de->d_name))
360 if (!startswith(de->d_name, "ask."))
363 if (!(p = strappend("/dev/.systemd/ask-password/", de->d_name))) {
364 log_error("Out of memory");
370 if ((q = parse_password(p, &wall)) < 0)
388 static int watch_passwords(void) {
395 int notify = -1, signal_fd = -1;
396 struct pollfd pollfd[_FD_MAX];
400 mkdir_p("/dev/.systemd/ask-password", 0755);
402 if ((notify = inotify_init1(IN_CLOEXEC)) < 0) {
407 if (inotify_add_watch(notify, "/dev/.systemd/ask-password", IN_CLOSE_WRITE|IN_MOVED_TO) < 0) {
412 assert_se(sigemptyset(&mask) == 0);
413 sigset_add_many(&mask, SIGINT, SIGTERM, -1);
414 assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
416 if ((signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC)) < 0) {
417 log_error("signalfd(): %m");
423 pollfd[FD_INOTIFY].fd = notify;
424 pollfd[FD_INOTIFY].events = POLLIN;
425 pollfd[FD_SIGNAL].fd = signal_fd;
426 pollfd[FD_SIGNAL].events = POLLIN;
429 if ((r = show_passwords()) < 0)
432 if (poll(pollfd, _FD_MAX, -1) < 0) {
441 if (pollfd[FD_INOTIFY].revents != 0)
444 if (pollfd[FD_SIGNAL].revents != 0)
452 close_nointr_nofail(notify);
455 close_nointr_nofail(signal_fd);
460 static int help(void) {
462 printf("%s [OPTIONS...]\n\n"
463 "Process system password requests.\n\n"
464 " -h --help Show this help\n"
465 " --list Show pending password requests\n"
466 " --query Process pending password requests\n"
467 " --watch Continously process password requests\n"
468 " --wall Continously forward password requests to wall\n"
469 " --plymouth Ask question with Plymouth instead of on TTY\n",
470 program_invocation_short_name);
475 static int parse_argv(int argc, char *argv[]) {
485 static const struct option options[] = {
486 { "help", no_argument, NULL, 'h' },
487 { "list", no_argument, NULL, ARG_LIST },
488 { "query", no_argument, NULL, ARG_QUERY },
489 { "watch", no_argument, NULL, ARG_WATCH },
490 { "wall", no_argument, NULL, ARG_WALL },
491 { "plymouth", no_argument, NULL, ARG_PLYMOUTH },
500 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
509 arg_action = ACTION_LIST;
513 arg_action = ACTION_QUERY;
517 arg_action = ACTION_WATCH;
521 arg_action = ACTION_WALL;
532 log_error("Unknown option code %c", c);
537 if (optind != argc) {
545 int main(int argc, char *argv[]) {
548 log_parse_environment();
551 if ((r = parse_argv(argc, argv)) <= 0)
554 if (arg_action == ACTION_WATCH ||
555 arg_action == ACTION_WALL)
556 r = watch_passwords();
558 r = show_passwords();
561 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;