summaryrefslogtreecommitdiff
path: root/src/cryptsetup/cryptsetup-generator.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/cryptsetup/cryptsetup-generator.c')
-rw-r--r--src/cryptsetup/cryptsetup-generator.c449
1 files changed, 0 insertions, 449 deletions
diff --git a/src/cryptsetup/cryptsetup-generator.c b/src/cryptsetup/cryptsetup-generator.c
deleted file mode 100644
index 386714b4fd..0000000000
--- a/src/cryptsetup/cryptsetup-generator.c
+++ /dev/null
@@ -1,449 +0,0 @@
-/*-*- 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 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
- Lesser General Public License for more details.
-
- 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 <string.h>
-#include <errno.h>
-#include <unistd.h>
-
-#include "log.h"
-#include "util.h"
-#include "unit-name.h"
-#include "mkdir.h"
-#include "virt.h"
-#include "strv.h"
-
-static const char *arg_dest = "/tmp";
-static bool arg_enabled = true;
-static bool arg_read_crypttab = true;
-static char **arg_proc_cmdline_disks = NULL;
-
-static bool has_option(const char *haystack, const char *needle) {
- const char *f = haystack;
- size_t l;
-
- assert(needle);
-
- if (!haystack)
- return false;
-
- 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) {
-
- char *p = NULL, *n = NULL, *d = NULL, *u = NULL, *from = NULL, *to = NULL, *e = NULL;
- int r;
- FILE *f = NULL;
- bool noauto, nofail;
-
- assert(name);
- assert(device);
-
- noauto = has_option(options, "noauto");
- nofail = has_option(options, "nofail");
-
- n = unit_name_from_path_instance("systemd-cryptsetup", name, ".service");
- if (!n) {
- r = -ENOMEM;
- log_error("Failed to allocate unit name.");
- goto fail;
- }
-
- p = strjoin(arg_dest, "/", n, NULL);
- if (!p) {
- r = -ENOMEM;
- log_error("Failed to allocate unit file name.");
- goto fail;
- }
-
- u = fstab_node_to_udev_node(device);
- if (!u) {
- r = -ENOMEM;
- log_error("Failed to allocate device node.");
- goto fail;
- }
-
- d = unit_name_from_path(u, ".device");
- if (!d) {
- r = -ENOMEM;
- log_error("Failed to allocate device name.");
- goto fail;
- }
-
- f = fopen(p, "wxe");
- if (!f) {
- r = -errno;
- log_error("Failed to create unit file: %m");
- goto fail;
- }
-
- 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"
- "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 (!nofail)
- fprintf(f,
- "Before=cryptsetup.target\n");
-
- if (password && (streq(password, "/dev/urandom") ||
- streq(password, "/dev/random") ||
- streq(password, "/dev/hw_random")))
- fputs("After=systemd-random-seed-load.service\n", f);
- else
- fputs("Before=local-fs.target\n", f);
-
- fprintf(f,
- "\n[Service]\n"
- "Type=oneshot\n"
- "RemainAfterExit=yes\n"
- "TimeoutSec=0\n" /* the binary handles timeouts anyway */
- "ExecStart=" SYSTEMD_CRYPTSETUP_PATH " attach '%s' '%s' '%s' '%s'\n"
- "ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n",
- name, u, strempty(password), strempty(options),
- name);
-
- if (has_option(options, "tmp"))
- fprintf(f,
- "ExecStartPost=/sbin/mke2fs '/dev/mapper/%s'\n",
- name);
-
- if (has_option(options, "swap"))
- fprintf(f,
- "ExecStartPost=/sbin/mkswap '/dev/mapper/%s'\n",
- name);
-
- fflush(f);
-
- if (ferror(f)) {
- r = -errno;
- log_error("Failed to write file: %m");
- goto fail;
- }
-
- if (asprintf(&from, "../%s", n) < 0) {
- r = -ENOMEM;
- goto fail;
- }
-
- if (!noauto) {
-
- to = strjoin(arg_dest, "/", d, ".wants/", n, NULL);
- if (!to) {
- r = -ENOMEM;
- goto fail;
- }
-
- 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;
- }
-
- free(to);
-
- if (!nofail)
- to = strjoin(arg_dest, "/cryptsetup.target.requires/", n, NULL);
- else
- to = strjoin(arg_dest, "/cryptsetup.target.wants/", n, NULL);
- if (!to) {
- r = -ENOMEM;
- goto fail;
- }
-
- 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;
- }
-
- free(to);
- to = NULL;
- }
-
- e = unit_name_escape(name);
- to = strjoin(arg_dest, "/dev-mapper-", e, ".device.requires/", n, NULL);
- if (!to) {
- r = -ENOMEM;
- goto fail;
- }
-
- 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;
- }
-
- r = 0;
-
-fail:
- free(p);
- free(n);
- free(d);
- free(e);
-
- free(from);
- free(to);
-
- if (f)
- fclose(f);
-
- return r;
-}
-
-static int parse_proc_cmdline(void) {
- char *line, *w, *state;
- int r;
- size_t l;
-
- if (detect_container(NULL) > 0)
- return 0;
-
- r = read_one_line_file("/proc/cmdline", &line);
- if (r < 0) {
- log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
- return 0;
- }
-
- FOREACH_WORD_QUOTED(w, l, line, state) {
- char *word;
-
- word = strndup(w, l);
- if (!word) {
- r = -ENOMEM;
- goto finish;
- }
-
- 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) {
- r = log_oom();
- goto finish;
- }
- 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) {
- r = log_oom();
- goto finish;
- }
- 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);
- }
-
- free(word);
- }
-
- r = 0;
-
-finish:
- free(line);
- return r;
-}
-
-int main(int argc, char *argv[]) {
- FILE *f = NULL;
- int r = EXIT_SUCCESS;
- unsigned n = 0;
- char **i;
-
- 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_SAFE);
- log_parse_environment();
- log_open();
-
- umask(0022);
-
- if (parse_proc_cmdline() < 0)
- return EXIT_FAILURE;
-
- if (!arg_enabled) {
- r = EXIT_SUCCESS;
- goto finish;
- }
-
- STRV_FOREACH(i, arg_proc_cmdline_disks) {
- char *name, *device;
- const char *p = *i;
-
- if (startswith(p, "luks-"))
- p += 5;
-
- name = strappend("luks-", p);
- device = strappend("UUID=", p);
-
- if (!name || !device) {
- log_oom();
- r = EXIT_FAILURE;
- free(name);
- free(device);
- goto finish;
- }
-
- if (create_disk(name, device, NULL, NULL) < 0)
- r = EXIT_FAILURE;
-
- free(name);
- free(device);
- }
-
- if (!arg_read_crypttab)
- return r;
-
- 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");
- }
-
- 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;
-
- 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;
- goto next;
- }
-
- if (create_disk(name, device, password, options) < 0)
- r = EXIT_FAILURE;
-
- next:
- free(name);
- free(device);
- free(password);
- free(options);
- }
-
-finish:
- if (f)
- fclose(f);
-
- strv_free(arg_proc_cmdline_disks);
-
- return r;
-}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-13 08:05:59 +0000