2010-11-08 05:02:45 +01:00
|
|
|
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
|
|
|
|
|
|
|
|
/***
|
|
|
|
This file is part of systemd.
|
|
|
|
|
|
|
|
Copyright 2010 Lennart Poettering
|
|
|
|
|
|
|
|
systemd is free software; you can redistribute it and/or modify it
|
|
|
|
under the terms of the GNU General Public License as published by
|
|
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
|
|
(at your option) any later version.
|
|
|
|
|
|
|
|
systemd is distributed in the hope that it will be useful, but
|
|
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
|
General Public License for more details.
|
|
|
|
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
|
|
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
***/
|
|
|
|
|
|
|
|
#include <string.h>
|
|
|
|
#include <errno.h>
|
|
|
|
#include <unistd.h>
|
|
|
|
|
|
|
|
#include "log.h"
|
|
|
|
#include "util.h"
|
|
|
|
#include "unit-name.h"
|
|
|
|
|
|
|
|
const char *arg_dest = "/tmp";
|
|
|
|
|
|
|
|
static bool has_option(const char *haystack, const char *needle) {
|
|
|
|
const char *f = haystack;
|
|
|
|
size_t l;
|
|
|
|
|
2011-04-16 01:56:16 +02:00
|
|
|
assert(needle);
|
|
|
|
|
|
|
|
if (!haystack)
|
|
|
|
return false;
|
|
|
|
|
2010-11-08 05:02:45 +01:00
|
|
|
l = strlen(needle);
|
|
|
|
|
|
|
|
while ((f = strstr(f, needle))) {
|
|
|
|
|
|
|
|
if (f > haystack && f[-1] != ',') {
|
|
|
|
f++;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (f[l] != 0 && f[l] == ',') {
|
|
|
|
f++;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int create_disk(
|
|
|
|
const char *name,
|
|
|
|
const char *device,
|
|
|
|
const char *password,
|
|
|
|
const char *options) {
|
|
|
|
|
2010-11-12 03:04:10 +01:00
|
|
|
char *p = NULL, *n = NULL, *d = NULL, *u = NULL, *from = NULL, *to = NULL, *e = NULL;
|
2010-11-08 05:02:45 +01:00
|
|
|
int r;
|
|
|
|
FILE *f = NULL;
|
|
|
|
|
|
|
|
assert(name);
|
|
|
|
assert(device);
|
|
|
|
|
|
|
|
if (!(n = unit_name_build_escape("cryptsetup", name, ".service"))) {
|
|
|
|
r = -ENOMEM;
|
|
|
|
log_error("Failed to allocate unit name.");
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (asprintf(&p, "%s/%s", arg_dest, n) < 0) {
|
|
|
|
r = -ENOMEM;
|
|
|
|
log_error("Failed to allocate unit file name.");
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!(u = fstab_node_to_udev_node(device))) {
|
|
|
|
r = -ENOMEM;
|
|
|
|
log_error("Failed to allocate device node.");
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!(d = unit_name_from_path(u, ".device"))) {
|
|
|
|
r = -ENOMEM;
|
|
|
|
log_error("Failed to allocate device name.");
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!(f = fopen(p, "wxe"))) {
|
|
|
|
r = -errno;
|
|
|
|
log_error("Failed to create unit file: %m");
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
fprintf(f,
|
|
|
|
"[Unit]\n"
|
2011-02-14 23:09:27 +01:00
|
|
|
"Description=Cryptography Setup for %%I\n"
|
2010-11-08 05:02:45 +01:00
|
|
|
"DefaultDependencies=no\n"
|
2010-11-15 04:11:42 +01:00
|
|
|
"BindTo=%s dev-mapper-%%i.device\n"
|
2010-11-08 05:02:45 +01:00
|
|
|
"After=systemd-readahead-collect.service systemd-readahead-replay.service %s\n"
|
2011-04-16 04:36:06 +02:00
|
|
|
"Before=shutdown.target cryptsetup.target\n",
|
2010-11-08 05:02:45 +01:00
|
|
|
d, d);
|
|
|
|
|
|
|
|
if (password && (streq(password, "/dev/urandom") ||
|
|
|
|
streq(password, "/dev/random") ||
|
|
|
|
streq(password, "/dev/hw_random")))
|
|
|
|
fprintf(f,
|
|
|
|
"After=systemd-random-seed-load.service\n");
|
|
|
|
|
|
|
|
fprintf(f,
|
|
|
|
"\n[Service]\n"
|
|
|
|
"Type=oneshot\n"
|
|
|
|
"RemainAfterExit=yes\n"
|
2011-04-14 02:36:02 +02:00
|
|
|
"TimeoutSec=0\n" /* the binary handles timeouts anyway */
|
2010-11-14 01:53:46 +01:00
|
|
|
"ExecStart=" SYSTEMD_CRYPTSETUP_PATH " attach '%s' '%s' '%s' '%s'\n"
|
2010-11-12 00:39:17 +01:00
|
|
|
"ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n",
|
2010-11-08 05:02:45 +01:00
|
|
|
name, u, strempty(password), strempty(options),
|
|
|
|
name);
|
|
|
|
|
2011-04-16 01:56:16 +02:00
|
|
|
if (has_option(options, "tmp"))
|
2010-11-08 05:02:45 +01:00
|
|
|
fprintf(f,
|
2011-04-13 22:22:10 +02:00
|
|
|
"ExecStartPost=/sbin/mke2fs '/dev/mapper/%s'\n",
|
2011-01-04 02:12:07 +01:00
|
|
|
name);
|
2010-11-08 05:02:45 +01:00
|
|
|
|
2011-04-16 01:56:16 +02:00
|
|
|
if (has_option(options, "swap"))
|
2010-11-08 05:02:45 +01:00
|
|
|
fprintf(f,
|
2011-04-13 22:22:10 +02:00
|
|
|
"ExecStartPost=/sbin/mkswap '/dev/mapper/%s'\n",
|
2011-01-04 02:12:07 +01:00
|
|
|
name);
|
2010-11-08 05:02:45 +01:00
|
|
|
|
|
|
|
fflush(f);
|
|
|
|
|
|
|
|
if (ferror(f)) {
|
|
|
|
r = -errno;
|
|
|
|
log_error("Failed to write file: %m");
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
2010-11-12 03:04:10 +01:00
|
|
|
if (asprintf(&from, "../%s", n) < 0) {
|
|
|
|
r = -ENOMEM;
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
2011-04-16 01:56:16 +02:00
|
|
|
if (!has_option(options, "noauto")) {
|
2010-11-08 05:02:45 +01:00
|
|
|
|
|
|
|
if (asprintf(&to, "%s/%s.wants/%s", arg_dest, d, n) < 0) {
|
|
|
|
r = -ENOMEM;
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
mkdir_parents(to, 0755);
|
|
|
|
|
|
|
|
if (symlink(from, to) < 0) {
|
|
|
|
log_error("Failed to create symlink '%s' to '%s': %m", from, to);
|
|
|
|
r = -errno;
|
|
|
|
goto fail;
|
|
|
|
}
|
2010-11-18 02:16:36 +01:00
|
|
|
|
|
|
|
free(to);
|
|
|
|
to = NULL;
|
|
|
|
|
2011-04-16 01:56:16 +02:00
|
|
|
if (!has_option(options, "nofail")) {
|
2010-11-18 02:16:36 +01:00
|
|
|
|
|
|
|
if (asprintf(&to, "%s/cryptsetup.target.wants/%s", arg_dest, n) < 0) {
|
|
|
|
r = -ENOMEM;
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
mkdir_parents(to, 0755);
|
|
|
|
|
|
|
|
if (symlink(from, to) < 0) {
|
|
|
|
log_error("Failed to create symlink '%s' to '%s': %m", from, to);
|
|
|
|
r = -errno;
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
}
|
2010-11-08 05:02:45 +01:00
|
|
|
}
|
|
|
|
|
2010-11-12 03:04:10 +01:00
|
|
|
free(to);
|
|
|
|
to = NULL;
|
|
|
|
|
|
|
|
e = unit_name_escape(name);
|
2010-11-15 18:26:37 +01:00
|
|
|
if (asprintf(&to, "%s/dev-mapper-%s.device.requires/%s", arg_dest, e, n) < 0) {
|
2010-11-12 03:04:10 +01:00
|
|
|
r = -ENOMEM;
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
mkdir_parents(to, 0755);
|
|
|
|
|
|
|
|
if (symlink(from, to) < 0) {
|
|
|
|
log_error("Failed to create symlink '%s' to '%s': %m", from, to);
|
|
|
|
r = -errno;
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
2010-11-08 05:02:45 +01:00
|
|
|
r = 0;
|
|
|
|
|
|
|
|
fail:
|
|
|
|
free(p);
|
|
|
|
free(n);
|
|
|
|
free(d);
|
2010-11-12 03:04:10 +01:00
|
|
|
free(e);
|
2010-11-08 05:02:45 +01:00
|
|
|
|
|
|
|
free(from);
|
|
|
|
free(to);
|
|
|
|
|
|
|
|
if (f)
|
|
|
|
fclose(f);
|
|
|
|
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
|
|
|
int main(int argc, char *argv[]) {
|
|
|
|
FILE *f;
|
|
|
|
int r = EXIT_SUCCESS;
|
|
|
|
unsigned n = 0;
|
|
|
|
|
|
|
|
if (argc > 2) {
|
|
|
|
log_error("This program takes one or no arguments.");
|
|
|
|
return EXIT_FAILURE;
|
|
|
|
}
|
|
|
|
|
2011-03-15 00:44:13 +01:00
|
|
|
if (argc > 1)
|
|
|
|
arg_dest = argv[1];
|
2010-11-08 05:02:45 +01:00
|
|
|
|
|
|
|
log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
|
|
|
|
log_parse_environment();
|
|
|
|
log_open();
|
|
|
|
|
|
|
|
if (!(f = fopen("/etc/crypttab", "re"))) {
|
|
|
|
|
|
|
|
if (errno == ENOENT)
|
|
|
|
r = EXIT_SUCCESS;
|
|
|
|
else {
|
|
|
|
r = EXIT_FAILURE;
|
|
|
|
log_error("Failed to open /etc/crypttab: %m");
|
|
|
|
}
|
|
|
|
|
|
|
|
goto finish;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (;;) {
|
|
|
|
char line[LINE_MAX], *l;
|
|
|
|
char *name = NULL, *device = NULL, *password = NULL, *options = NULL;
|
|
|
|
int k;
|
|
|
|
|
|
|
|
if (!(fgets(line, sizeof(line), f)))
|
|
|
|
break;
|
|
|
|
|
|
|
|
n++;
|
|
|
|
|
|
|
|
l = strstrip(line);
|
|
|
|
if (*l == '#' || *l == 0)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
if ((k = sscanf(l, "%ms %ms %ms %ms", &name, &device, &password, &options)) < 2 || k > 4) {
|
|
|
|
log_error("Failed to parse /etc/crypttab:%u, ignoring.", n);
|
|
|
|
r = EXIT_FAILURE;
|
|
|
|
goto next;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (create_disk(name, device, password, options) < 0)
|
|
|
|
r = EXIT_FAILURE;
|
|
|
|
|
|
|
|
next:
|
|
|
|
free(name);
|
|
|
|
free(device);
|
|
|
|
free(password);
|
|
|
|
free(options);
|
|
|
|
}
|
|
|
|
|
|
|
|
finish:
|
|
|
|
return r;
|
|
|
|
}
|