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/>.
28 #include "unit-name.h"
30 const char *arg_dest = "/tmp";
32 static bool has_option(const char *haystack, const char *needle) {
33 const char *f = haystack;
38 while ((f = strstr(f, needle))) {
40 if (f > haystack && f[-1] != ',') {
45 if (f[l] != 0 && f[l] == ',') {
56 static int create_disk(
60 const char *options) {
62 char *p = NULL, *n = NULL, *d = NULL, *u = NULL, *from = NULL, *to = NULL, *e = NULL;
69 if (!(n = unit_name_build_escape("cryptsetup", name, ".service"))) {
71 log_error("Failed to allocate unit name.");
75 if (asprintf(&p, "%s/%s", arg_dest, n) < 0) {
77 log_error("Failed to allocate unit file name.");
81 if (!(u = fstab_node_to_udev_node(device))) {
83 log_error("Failed to allocate device node.");
87 if (!(d = unit_name_from_path(u, ".device"))) {
89 log_error("Failed to allocate device name.");
93 if (!(f = fopen(p, "wxe"))) {
95 log_error("Failed to create unit file: %m");
101 "Description=Cryptography Setup for %%f\n"
102 "DefaultDependencies=no\n"
103 "BindTo=%s dev-mapper-%%i.device\n"
104 "After=systemd-readahead-collect.service systemd-readahead-replay.service %s\n"
105 "Before=dev-mapper-%%i.device shutdown.target cryptsetup.target\n",
108 if (password && (streq(password, "/dev/urandom") ||
109 streq(password, "/dev/random") ||
110 streq(password, "/dev/hw_random")))
112 "After=systemd-random-seed-load.service\n");
117 "RemainAfterExit=yes\n"
118 "ExecStart=" SYSTEMD_CRYPTSETUP_PATH " attach '%s' '%s' '%s' '%s'\n"
119 "ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n",
120 name, u, strempty(password), strempty(options),
123 if (options && has_option(options, "tmp"))
125 "ExecStartPost=/sbin/mke2fs '/dev/mapper/%s'",
128 if (options && has_option(options, "swap"))
130 "ExecStartPost=/sbin/mkswap '/dev/mapper/%s'",
137 log_error("Failed to write file: %m");
141 if (asprintf(&from, "../%s", n) < 0) {
146 if (!options || !has_option(options, "noauto")) {
148 if (asprintf(&to, "%s/%s.wants/%s", arg_dest, d, n) < 0) {
153 mkdir_parents(to, 0755);
155 if (symlink(from, to) < 0) {
156 log_error("Failed to create symlink '%s' to '%s': %m", from, to);
164 if (!options || !has_option(options, "nofail")) {
166 if (asprintf(&to, "%s/cryptsetup.target.wants/%s", arg_dest, n) < 0) {
171 mkdir_parents(to, 0755);
173 if (symlink(from, to) < 0) {
174 log_error("Failed to create symlink '%s' to '%s': %m", from, to);
184 e = unit_name_escape(name);
185 if (asprintf(&to, "%s/dev-mapper-%s.device.requires/%s", arg_dest, e, n) < 0) {
190 mkdir_parents(to, 0755);
192 if (symlink(from, to) < 0) {
193 log_error("Failed to create symlink '%s' to '%s': %m", from, to);
215 int main(int argc, char *argv[]) {
217 int r = EXIT_SUCCESS;
221 log_error("This program takes one or no arguments.");
227 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
228 log_parse_environment();
231 if (!(f = fopen("/etc/crypttab", "re"))) {
237 log_error("Failed to open /etc/crypttab: %m");
244 char line[LINE_MAX], *l;
245 char *name = NULL, *device = NULL, *password = NULL, *options = NULL;
248 if (!(fgets(line, sizeof(line), f)))
254 if (*l == '#' || *l == 0)
257 if ((k = sscanf(l, "%ms %ms %ms %ms", &name, &device, &password, &options)) < 2 || k > 4) {
258 log_error("Failed to parse /etc/crypttab:%u, ignoring.", n);
263 if (create_disk(name, device, password, options) < 0)