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
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 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.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU General Public License
+ You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include "log.h"
#include "util.h"
#include "unit-name.h"
+#include "mkdir.h"
+#include "virt.h"
+#include "strv.h"
+#include "fileio.h"
-const char *arg_dest = "/tmp";
+static const char *arg_dest = "/tmp";
+static bool arg_enabled = true;
+static bool arg_read_crypttab = true;
static bool has_option(const char *haystack, const char *needle) {
const char *f = haystack;
const char *password,
const char *options) {
- char *p = NULL, *n = NULL, *d = NULL, *u = NULL, *from = NULL, *to = NULL, *e = NULL;
- int r;
- FILE *f = NULL;
+ char _cleanup_free_ *p = NULL, *n = NULL, *d = NULL, *u = NULL, *from = NULL, *to = NULL, *e = NULL;
+ FILE _cleanup_fclose_ *f = NULL;
bool noauto, nofail;
assert(name);
noauto = has_option(options, "noauto");
nofail = has_option(options, "nofail");
- if (!(n = unit_name_build_escape("cryptsetup", name, ".service"))) {
- r = -ENOMEM;
- log_error("Failed to allocate unit name.");
- goto fail;
- }
+ n = unit_name_from_path_instance("systemd-cryptsetup", name, ".service");
+ if (!n)
+ return log_oom();
- if (asprintf(&p, "%s/%s", arg_dest, n) < 0) {
- r = -ENOMEM;
- log_error("Failed to allocate unit file name.");
- goto fail;
- }
+ p = strjoin(arg_dest, "/", n, NULL);
+ if (!p)
+ return log_oom();
- if (!(u = fstab_node_to_udev_node(device))) {
- r = -ENOMEM;
- log_error("Failed to allocate device node.");
- goto fail;
- }
+ u = fstab_node_to_udev_node(device);
+ if (!u)
+ return log_oom();
- if (!(d = unit_name_from_path(u, ".device"))) {
- r = -ENOMEM;
- log_error("Failed to allocate device name.");
- goto fail;
- }
+ d = unit_name_from_path(u, ".device");
+ if (!d)
+ return log_oom();
- if (!(f = fopen(p, "wxe"))) {
- r = -errno;
- log_error("Failed to create unit file: %m");
- goto fail;
+ f = fopen(p, "wxe");
+ if (!f) {
+ log_error("Failed to create unit file %s: %m", p);
+ return -errno;
}
fprintf(f,
+ "# Automatically generated by systemd-cryptsetup-generator\n\n"
"[Unit]\n"
"Description=Cryptography Setup for %%I\n"
+ "Documentation=man:systemd-cryptsetup@.service(8) man:crypttab(5)\n"
+ "SourcePath=/etc/crypttab\n"
"Conflicts=umount.target\n"
"DefaultDependencies=no\n"
- "BindTo=%s dev-mapper-%%i.device\n"
+ "BindsTo=%s dev-mapper-%%i.device\n"
"After=systemd-readahead-collect.service systemd-readahead-replay.service %s\n"
"Before=umount.target\n",
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");
+ fputs("After=systemd-random-seed-load.service\n", f);
else
- fprintf(f,
- "Before=local-fs.target\n");
+ fputs("Before=local-fs.target\n", f);
fprintf(f,
"\n[Service]\n"
fflush(f);
if (ferror(f)) {
- r = -errno;
- log_error("Failed to write file: %m");
- goto fail;
+ log_error("Failed to write file %s: %m", p);
+ return -errno;
}
- if (asprintf(&from, "../%s", n) < 0) {
- r = -ENOMEM;
- goto fail;
- }
+ if (asprintf(&from, "../%s", n) < 0)
+ return log_oom();
if (!noauto) {
- if (asprintf(&to, "%s/%s.wants/%s", arg_dest, d, n) < 0) {
- r = -ENOMEM;
- goto fail;
- }
-
- mkdir_parents(to, 0755);
+ to = strjoin(arg_dest, "/", d, ".wants/", n, NULL);
+ if (!to)
+ return log_oom();
+ mkdir_parents_label(to, 0755);
if (symlink(from, to) < 0) {
log_error("Failed to create symlink '%s' to '%s': %m", from, to);
- r = -errno;
- goto fail;
+ return -errno;
}
free(to);
- to = NULL;
-
if (!nofail)
- asprintf(&to, "%s/cryptsetup.target.requires/%s", arg_dest, n);
+ to = strjoin(arg_dest, "/cryptsetup.target.requires/", n, NULL);
else
- asprintf(&to, "%s/cryptsetup.target.wants/%s", arg_dest, n);
-
- if (!to) {
- r = -ENOMEM;
- goto fail;
- }
-
- mkdir_parents(to, 0755);
+ to = strjoin(arg_dest, "/cryptsetup.target.wants/", n, NULL);
+ if (!to)
+ return log_oom();
+ mkdir_parents_label(to, 0755);
if (symlink(from, to) < 0) {
log_error("Failed to create symlink '%s' to '%s': %m", from, to);
- r = -errno;
- goto fail;
+ return -errno;
}
}
- free(to);
- to = NULL;
-
e = unit_name_escape(name);
- if (asprintf(&to, "%s/dev-mapper-%s.device.requires/%s", arg_dest, e, n) < 0) {
- r = -ENOMEM;
- goto fail;
- }
+ if (!e)
+ return log_oom();
- mkdir_parents(to, 0755);
+ free(to);
+ to = strjoin(arg_dest, "/dev-mapper-", e, ".device.requires/", n, NULL);
+ if (!to)
+ return log_oom();
+ mkdir_parents_label(to, 0755);
if (symlink(from, to) < 0) {
log_error("Failed to create symlink '%s' to '%s': %m", from, to);
- r = -errno;
- goto fail;
+ return -errno;
}
- r = 0;
+ return 0;
+}
-fail:
- free(p);
- free(n);
- free(d);
- free(e);
+static int parse_proc_cmdline(char ***arg_proc_cmdline_disks) {
+ char _cleanup_free_ *line = NULL;
+ char *w = NULL, *state = NULL;
+ int r;
+ size_t l;
- free(from);
- free(to);
+ if (detect_container(NULL) > 0)
+ return 0;
- if (f)
- fclose(f);
+ r = read_one_line_file("/proc/cmdline", &line);
+ if (r < 0) {
+ log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
+ return 0;
+ }
- return r;
+ FOREACH_WORD_QUOTED(w, l, line, state) {
+ char _cleanup_free_ *word = NULL;
+
+ word = strndup(w, l);
+ if (!word)
+ return log_oom();
+
+ if (startswith(word, "luks=")) {
+ r = parse_boolean(word + 5);
+ if (r < 0)
+ log_warning("Failed to parse luks switch %s. Ignoring.", word + 5);
+ else
+ arg_enabled = r;
+
+ } else if (startswith(word, "rd.luks=")) {
+
+ if (in_initrd()) {
+ r = parse_boolean(word + 8);
+ if (r < 0)
+ log_warning("Failed to parse luks switch %s. Ignoring.", word + 8);
+ else
+ arg_enabled = r;
+ }
+
+ } else if (startswith(word, "luks.crypttab=")) {
+ r = parse_boolean(word + 14);
+ if (r < 0)
+ log_warning("Failed to parse luks crypttab switch %s. Ignoring.", word + 14);
+ else
+ arg_read_crypttab = r;
+
+ } else if (startswith(word, "rd.luks.crypttab=")) {
+
+ if (in_initrd()) {
+ r = parse_boolean(word + 17);
+ if (r < 0)
+ log_warning("Failed to parse luks crypttab switch %s. Ignoring.", word + 17);
+ else
+ arg_read_crypttab = r;
+ }
+
+ } else if (startswith(word, "luks.uuid=")) {
+ char **t;
+
+ t = strv_append(*arg_proc_cmdline_disks, word + 10);
+ if (!t)
+ return log_oom();
+
+ strv_free(*arg_proc_cmdline_disks);
+ *arg_proc_cmdline_disks = t;
+
+ } else if (startswith(word, "rd.luks.uuid=")) {
+
+ if (in_initrd()) {
+ char **t;
+
+ t = strv_append(*arg_proc_cmdline_disks, word + 13);
+ if (!t)
+ return log_oom();
+
+ strv_free(*arg_proc_cmdline_disks);
+ *arg_proc_cmdline_disks = t;
+ }
+
+ } else if (startswith(word, "luks.") ||
+ (in_initrd() && startswith(word, "rd.luks."))) {
+
+ log_warning("Unknown kernel switch %s. Ignoring.", word);
+ }
+ }
+
+ strv_uniq(*arg_proc_cmdline_disks);
+
+ return 0;
}
int main(int argc, char *argv[]) {
- FILE *f;
- int r = EXIT_SUCCESS;
+ FILE _cleanup_fclose_ *f = NULL;
unsigned n = 0;
+ int r = EXIT_SUCCESS;
+ char **i;
+ char _cleanup_strv_free_ **arg_proc_cmdline_disks_done = NULL;
+ char _cleanup_strv_free_ **arg_proc_cmdline_disks = NULL;
- if (argc > 2) {
- log_error("This program takes one or no arguments.");
+ if (argc > 1 && argc != 4) {
+ log_error("This program takes three or no arguments.");
return EXIT_FAILURE;
}
if (argc > 1)
arg_dest = argv[1];
- log_set_target(LOG_TARGET_AUTO);
+ log_set_target(LOG_TARGET_SAFE);
log_parse_environment();
log_open();
umask(0022);
- if (!(f = fopen("/etc/crypttab", "re"))) {
+ if (parse_proc_cmdline(&arg_proc_cmdline_disks) < 0)
+ return EXIT_FAILURE;
- if (errno == ENOENT)
- r = EXIT_SUCCESS;
- else {
- r = EXIT_FAILURE;
- log_error("Failed to open /etc/crypttab: %m");
+ if (!arg_enabled)
+ return EXIT_SUCCESS;
+
+ if (arg_read_crypttab) {
+ f = fopen("/etc/crypttab", "re");
+
+ if (!f) {
+ if (errno == ENOENT)
+ r = EXIT_SUCCESS;
+ else {
+ r = EXIT_FAILURE;
+ log_error("Failed to open /etc/crypttab: %m");
+ }
+ } else for (;;) {
+ char line[LINE_MAX], *l;
+ char _cleanup_free_ *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;
+
+ k = sscanf(l, "%ms %ms %ms %ms", &name, &device, &password, &options);
+ if (k < 2 || k > 4) {
+ log_error("Failed to parse /etc/crypttab:%u, ignoring.", n);
+ r = EXIT_FAILURE;
+ continue;
+ }
+
+ if (arg_proc_cmdline_disks) {
+ /*
+ If luks UUIDs are specified on the kernel command line, use them as a filter
+ for /etc/crypttab and only generate units for those.
+ */
+ STRV_FOREACH(i, arg_proc_cmdline_disks) {
+ char _cleanup_free_ *proc_device = NULL, *proc_name = NULL;
+ const char *p = *i;
+
+ if (startswith(p, "luks-"))
+ p += 5;
+
+ proc_name = strappend("luks-", p);
+ proc_device = strappend("UUID=", p);
+
+ if (!proc_name || !proc_device)
+ return log_oom();
+
+ if (streq(proc_device, device) || streq(proc_name, name)) {
+ char **t;
+
+ if (create_disk(name, device, password, options) < 0)
+ r = EXIT_FAILURE;
+
+ t = strv_append(arg_proc_cmdline_disks_done, p);
+ if (!t)
+ return log_oom();
+
+ strv_free(arg_proc_cmdline_disks_done);
+ arg_proc_cmdline_disks_done = t;
+ }
+ }
+ } else {
+ if (create_disk(name, device, password, options) < 0)
+ r = EXIT_FAILURE;
+ }
}
-
- goto finish;
}
- for (;;) {
- char line[LINE_MAX], *l;
- char *name = NULL, *device = NULL, *password = NULL, *options = NULL;
- int k;
+ STRV_FOREACH(i, arg_proc_cmdline_disks) {
+ /*
+ Generate units for those UUIDs, which were specified
+ on the kernel command line and not yet written.
+ */
- if (!(fgets(line, sizeof(line), f)))
- break;
+ char _cleanup_free_ *name = NULL, *device = NULL;
+ const char *p = *i;
- n++;
+ if (startswith(p, "luks-"))
+ p += 5;
- l = strstrip(line);
- if (*l == '#' || *l == 0)
+ if (strv_contains(arg_proc_cmdline_disks_done, p))
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;
- }
+ name = strappend("luks-", p);
+ device = strappend("UUID=", p);
- if (create_disk(name, device, password, options) < 0)
- r = EXIT_FAILURE;
+ if (!name || !device)
+ return log_oom();
- next:
- free(name);
- free(device);
- free(password);
- free(options);
+ if (create_disk(name, device, NULL, "timeout=0") < 0)
+ r = EXIT_FAILURE;
}
-finish:
return r;
}
~ianmdlvl / elogind.git / blobdiff