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git.ipfire.org Git - thirdparty/systemd.git/blob - src/cryptsetup/cryptsetup-generator.c
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
;
43 while ((f
= strstr(f
, needle
))) {
45 if (f
> haystack
&& f
[-1] != ',') {
50 if (f
[l
] != 0 && f
[l
] != ',') {
61 static int create_disk(
65 const char *options
) {
67 char *p
= NULL
, *n
= NULL
, *d
= NULL
, *u
= NULL
, *from
= NULL
, *to
= NULL
, *e
= NULL
;
75 noauto
= has_option(options
, "noauto");
76 nofail
= has_option(options
, "nofail");
78 if (!(n
= unit_name_build_escape("cryptsetup", name
, ".service"))) {
80 log_error("Failed to allocate unit name.");
84 if (asprintf(&p
, "%s/%s", arg_dest
, n
) < 0) {
86 log_error("Failed to allocate unit file name.");
90 if (!(u
= fstab_node_to_udev_node(device
))) {
92 log_error("Failed to allocate device node.");
96 if (!(d
= unit_name_from_path(u
, ".device"))) {
98 log_error("Failed to allocate device name.");
102 if (!(f
= fopen(p
, "wxe"))) {
104 log_error("Failed to create unit file: %m");
110 "Description=Cryptography Setup for %%I\n"
111 "Conflicts=umount.target\n"
112 "DefaultDependencies=no\n"
113 "BindTo=%s dev-mapper-%%i.device\n"
114 "After=systemd-readahead-collect.service systemd-readahead-replay.service %s\n"
115 "Before=umount.target\n",
120 "Before=cryptsetup.target\n");
122 if (password
&& (streq(password
, "/dev/urandom") ||
123 streq(password
, "/dev/random") ||
124 streq(password
, "/dev/hw_random")))
126 "After=systemd-random-seed-load.service\n");
129 "Before=local-fs.target\n");
134 "RemainAfterExit=yes\n"
135 "TimeoutSec=0\n" /* the binary handles timeouts anyway */
136 "ExecStart=" SYSTEMD_CRYPTSETUP_PATH
" attach '%s' '%s' '%s' '%s'\n"
137 "ExecStop=" SYSTEMD_CRYPTSETUP_PATH
" detach '%s'\n",
138 name
, u
, strempty(password
), strempty(options
),
141 if (has_option(options
, "tmp"))
143 "ExecStartPost=/sbin/mke2fs '/dev/mapper/%s'\n",
146 if (has_option(options
, "swap"))
148 "ExecStartPost=/sbin/mkswap '/dev/mapper/%s'\n",
155 log_error("Failed to write file: %m");
159 if (asprintf(&from
, "../%s", n
) < 0) {
166 if (asprintf(&to
, "%s/%s.wants/%s", arg_dest
, d
, 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
);
183 asprintf(&to
, "%s/cryptsetup.target.requires/%s", arg_dest
, n
);
185 asprintf(&to
, "%s/cryptsetup.target.wants/%s", arg_dest
, n
);
192 mkdir_parents(to
, 0755);
194 if (symlink(from
, to
) < 0) {
195 log_error("Failed to create symlink '%s' to '%s': %m", from
, to
);
204 e
= unit_name_escape(name
);
205 if (asprintf(&to
, "%s/dev-mapper-%s.device.requires/%s", arg_dest
, e
, n
) < 0) {
210 mkdir_parents(to
, 0755);
212 if (symlink(from
, to
) < 0) {
213 log_error("Failed to create symlink '%s' to '%s': %m", from
, to
);
235 int main(int argc
, char *argv
[]) {
237 int r
= EXIT_SUCCESS
;
241 log_error("This program takes one or no arguments.");
248 log_set_target(LOG_TARGET_AUTO
);
249 log_parse_environment();
254 if (!(f
= fopen("/etc/crypttab", "re"))) {
260 log_error("Failed to open /etc/crypttab: %m");
267 char line
[LINE_MAX
], *l
;
268 char *name
= NULL
, *device
= NULL
, *password
= NULL
, *options
= NULL
;
271 if (!(fgets(line
, sizeof(line
), f
)))
277 if (*l
== '#' || *l
== 0)
280 if ((k
= sscanf(l
, "%ms %ms %ms %ms", &name
, &device
, &password
, &options
)) < 2 || k
> 4) {
281 log_error("Failed to parse /etc/crypttab:%u, ignoring.", n
);
286 if (create_disk(name
, device
, password
, options
) < 0)