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firstboot: Update help string with --root-shell options
[thirdparty/systemd.git] / src / firstboot / firstboot.c
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1/* SPDX-License-Identifier: LGPL-2.1+ */
2
3#include <fcntl.h>
4#include <getopt.h>
5#include <linux/loop.h>
6#include <unistd.h>
7
8#include "sd-id128.h"
9
10#include "alloc-util.h"
11#include "ask-password-api.h"
12#include "copy.h"
13#include "dissect-image.h"
14#include "env-file.h"
15#include "fd-util.h"
16#include "fileio.h"
17#include "fs-util.h"
18#include "hostname-util.h"
19#include "kbd-util.h"
20#include "libcrypt-util.h"
21#include "locale-util.h"
22#include "loop-util.h"
23#include "main-func.h"
24#include "memory-util.h"
25#include "mkdir.h"
26#include "mount-util.h"
27#include "namespace-util.h"
28#include "os-util.h"
29#include "parse-util.h"
30#include "path-util.h"
31#include "pretty-print.h"
32#include "proc-cmdline.h"
33#include "random-util.h"
34#include "string-util.h"
35#include "strv.h"
36#include "terminal-util.h"
37#include "time-util.h"
38#include "tmpfile-util-label.h"
39#include "tmpfile-util.h"
40#include "umask-util.h"
41#include "user-util.h"
42
43static char *arg_root = NULL;
44static char *arg_image = NULL;
45static char *arg_locale = NULL; /* $LANG */
46static char *arg_keymap = NULL;
47static char *arg_locale_messages = NULL; /* $LC_MESSAGES */
48static char *arg_timezone = NULL;
49static char *arg_hostname = NULL;
50static sd_id128_t arg_machine_id = {};
51static char *arg_root_password = NULL;
52static char *arg_root_shell = NULL;
53static char *arg_kernel_cmdline = NULL;
54static bool arg_prompt_locale = false;
55static bool arg_prompt_keymap = false;
56static bool arg_prompt_timezone = false;
57static bool arg_prompt_hostname = false;
58static bool arg_prompt_root_password = false;
59static bool arg_prompt_root_shell = false;
60static bool arg_copy_locale = false;
61static bool arg_copy_keymap = false;
62static bool arg_copy_timezone = false;
63static bool arg_copy_root_password = false;
64static bool arg_copy_root_shell = false;
65static bool arg_force = false;
66static bool arg_delete_root_password = false;
67static bool arg_root_password_is_hashed = false;
68static bool arg_welcome = true;
69
70STATIC_DESTRUCTOR_REGISTER(arg_root, freep);
71STATIC_DESTRUCTOR_REGISTER(arg_image, freep);
72STATIC_DESTRUCTOR_REGISTER(arg_locale, freep);
73STATIC_DESTRUCTOR_REGISTER(arg_locale_messages, freep);
74STATIC_DESTRUCTOR_REGISTER(arg_keymap, freep);
75STATIC_DESTRUCTOR_REGISTER(arg_timezone, freep);
76STATIC_DESTRUCTOR_REGISTER(arg_hostname, freep);
77STATIC_DESTRUCTOR_REGISTER(arg_root_password, erase_and_freep);
78
79static bool press_any_key(void) {
80 char k = 0;
81 bool need_nl = true;
82
83 printf("-- Press any key to proceed --");
84 fflush(stdout);
85
86 (void) read_one_char(stdin, &k, USEC_INFINITY, &need_nl);
87
88 if (need_nl)
89 putchar('\n');
90
91 return k != 'q';
92}
93
94static void print_welcome(void) {
95 _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
96 static bool done = false;
97 const char *pn;
98 int r;
99
100 if (!arg_welcome)
101 return;
102
103 if (done)
104 return;
105
106 r = parse_os_release(
107 arg_root,
108 "PRETTY_NAME", &pretty_name,
109 "ANSI_COLOR", &ansi_color,
110 NULL);
111 if (r < 0)
112 log_full_errno(r == -ENOENT ? LOG_DEBUG : LOG_WARNING, r,
113 "Failed to read os-release file, ignoring: %m");
114
115 pn = isempty(pretty_name) ? "Linux" : pretty_name;
116
117 if (colors_enabled())
118 printf("\nWelcome to your new installation of \x1B[%sm%s\x1B[0m!\n", ansi_color, pn);
119 else
120 printf("\nWelcome to your new installation of %s!\n", pn);
121
122 printf("\nPlease configure your system!\n\n");
123
124 press_any_key();
125
126 done = true;
127}
128
129static int show_menu(char **x, unsigned n_columns, unsigned width, unsigned percentage) {
130 unsigned break_lines, break_modulo;
131 size_t n, per_column, i, j;
132
133 assert(n_columns > 0);
134
135 n = strv_length(x);
136 per_column = DIV_ROUND_UP(n, n_columns);
137
138 break_lines = lines();
139 if (break_lines > 2)
140 break_lines--;
141
142 /* The first page gets two extra lines, since we want to show
143 * a title */
144 break_modulo = break_lines;
145 if (break_modulo > 3)
146 break_modulo -= 3;
147
148 for (i = 0; i < per_column; i++) {
149
150 for (j = 0; j < n_columns; j ++) {
151 _cleanup_free_ char *e = NULL;
152
153 if (j * per_column + i >= n)
154 break;
155
156 e = ellipsize(x[j * per_column + i], width, percentage);
157 if (!e)
158 return log_oom();
159
160 printf("%4zu) %-*s", j * per_column + i + 1, width, e);
161 }
162
163 putchar('\n');
164
165 /* on the first screen we reserve 2 extra lines for the title */
166 if (i % break_lines == break_modulo) {
167 if (!press_any_key())
168 return 0;
169 }
170 }
171
172 return 0;
173}
174
175static int prompt_loop(const char *text, char **l, unsigned percentage, bool (*is_valid)(const char *name), char **ret) {
176 int r;
177
178 assert(text);
179 assert(is_valid);
180 assert(ret);
181
182 for (;;) {
183 _cleanup_free_ char *p = NULL;
184 unsigned u;
185
186 r = ask_string(&p, "%s %s (empty to skip, \"list\" to list options): ",
187 special_glyph(SPECIAL_GLYPH_TRIANGULAR_BULLET), text);
188 if (r < 0)
189 return log_error_errno(r, "Failed to query user: %m");
190
191 if (isempty(p)) {
192 log_warning("No data entered, skipping.");
193 return 0;
194 }
195
196 if (streq(p, "list")) {
197 r = show_menu(l, 3, 22, percentage);
198 if (r < 0)
199 return r;
200
201 putchar('\n');
202 continue;
203 };
204
205 r = safe_atou(p, &u);
206 if (r >= 0) {
207 if (u <= 0 || u > strv_length(l)) {
208 log_error("Specified entry number out of range.");
209 continue;
210 }
211
212 log_info("Selected '%s'.", l[u-1]);
213 if (free_and_strdup(ret, l[u-1]) < 0)
214 return log_oom();
215
216 return 0;
217 }
218
219 if (!is_valid(p)) {
220 log_error("Entered data invalid.");
221 continue;
222 }
223
224 return free_and_replace(*ret, p);
225 }
226}
227
228static bool locale_is_ok(const char *name) {
229
230 if (arg_root)
231 return locale_is_valid(name);
232
233 return locale_is_installed(name) > 0;
234}
235
236static int prompt_locale(void) {
237 _cleanup_strv_free_ char **locales = NULL;
238 int r;
239
240 if (arg_locale || arg_locale_messages)
241 return 0;
242
243 if (!arg_prompt_locale)
244 return 0;
245
246 r = get_locales(&locales);
247 if (r < 0)
248 return log_error_errno(r, "Cannot query locales list: %m");
249
250 if (strv_isempty(locales))
251 log_debug("No locales found, skipping locale selection.");
252 else if (strv_length(locales) == 1) {
253
254 if (streq(locales[0], SYSTEMD_DEFAULT_LOCALE))
255 log_debug("Only installed locale is default locale anyway, not setting locale explicitly.");
256 else {
257 log_debug("Only a single locale available (%s), selecting it as default.", locales[0]);
258
259 arg_locale = strdup(locales[0]);
260 if (!arg_locale)
261 return log_oom();
262
263 /* Not setting arg_locale_message here, since it defaults to LANG anyway */
264 }
265 } else {
266 print_welcome();
267
268 r = prompt_loop("Please enter system locale name or number",
269 locales, 60, locale_is_ok, &arg_locale);
270 if (r < 0)
271 return r;
272
273 if (isempty(arg_locale))
274 return 0;
275
276 r = prompt_loop("Please enter system message locale name or number",
277 locales, 60, locale_is_ok, &arg_locale_messages);
278 if (r < 0)
279 return r;
280
281 /* Suppress the messages setting if it's the same as the main locale anyway */
282 if (streq_ptr(arg_locale, arg_locale_messages))
283 arg_locale_messages = mfree(arg_locale_messages);
284 }
285
286 return 0;
287}
288
289static int process_locale(void) {
290 const char *etc_localeconf;
291 char* locales[3];
292 unsigned i = 0;
293 int r;
294
295 etc_localeconf = prefix_roota(arg_root, "/etc/locale.conf");
296 if (laccess(etc_localeconf, F_OK) >= 0 && !arg_force)
297 return 0;
298
299 if (arg_copy_locale && arg_root) {
300
301 (void) mkdir_parents(etc_localeconf, 0755);
302 r = copy_file("/etc/locale.conf", etc_localeconf, 0, 0644, 0, 0, COPY_REFLINK);
303 if (r != -ENOENT) {
304 if (r < 0)
305 return log_error_errno(r, "Failed to copy %s: %m", etc_localeconf);
306
307 log_info("%s copied.", etc_localeconf);
308 return 0;
309 }
310 }
311
312 r = prompt_locale();
313 if (r < 0)
314 return r;
315
316 if (!isempty(arg_locale))
317 locales[i++] = strjoina("LANG=", arg_locale);
318 if (!isempty(arg_locale_messages) && !streq(arg_locale_messages, arg_locale))
319 locales[i++] = strjoina("LC_MESSAGES=", arg_locale_messages);
320
321 if (i == 0)
322 return 0;
323
324 locales[i] = NULL;
325
326 (void) mkdir_parents(etc_localeconf, 0755);
327 r = write_env_file(etc_localeconf, locales);
328 if (r < 0)
329 return log_error_errno(r, "Failed to write %s: %m", etc_localeconf);
330
331 log_info("%s written.", etc_localeconf);
332 return 0;
333}
334
335static int prompt_keymap(void) {
336 _cleanup_strv_free_ char **kmaps = NULL;
337 int r;
338
339 if (arg_keymap)
340 return 0;
341
342 if (!arg_prompt_keymap)
343 return 0;
344
345 r = get_keymaps(&kmaps);
346 if (r == -ENOENT) /* no keymaps installed */
347 return r;
348 if (r < 0)
349 return log_error_errno(r, "Failed to read keymaps: %m");
350
351 print_welcome();
352
353 return prompt_loop("Please enter system keymap name or number",
354 kmaps, 60, keymap_is_valid, &arg_keymap);
355}
356
357static int process_keymap(void) {
358 const char *etc_vconsoleconf;
359 char **keymap;
360 int r;
361
362 etc_vconsoleconf = prefix_roota(arg_root, "/etc/vconsole.conf");
363 if (laccess(etc_vconsoleconf, F_OK) >= 0 && !arg_force)
364 return 0;
365
366 if (arg_copy_keymap && arg_root) {
367
368 (void) mkdir_parents(etc_vconsoleconf, 0755);
369 r = copy_file("/etc/vconsole.conf", etc_vconsoleconf, 0, 0644, 0, 0, COPY_REFLINK);
370 if (r != -ENOENT) {
371 if (r < 0)
372 return log_error_errno(r, "Failed to copy %s: %m", etc_vconsoleconf);
373
374 log_info("%s copied.", etc_vconsoleconf);
375 return 0;
376 }
377 }
378
379 r = prompt_keymap();
380 if (r == -ENOENT)
381 return 0; /* don't fail if no keymaps are installed */
382 if (r < 0)
383 return r;
384
385 if (isempty(arg_keymap))
386 return 0;
387
388 keymap = STRV_MAKE(strjoina("KEYMAP=", arg_keymap));
389
390 r = mkdir_parents(etc_vconsoleconf, 0755);
391 if (r < 0)
392 return log_error_errno(r, "Failed to create the parent directory of %s: %m", etc_vconsoleconf);
393
394 r = write_env_file(etc_vconsoleconf, keymap);
395 if (r < 0)
396 return log_error_errno(r, "Failed to write %s: %m", etc_vconsoleconf);
397
398 log_info("%s written.", etc_vconsoleconf);
399 return 0;
400}
401
402static bool timezone_is_valid_log_error(const char *name) {
403 return timezone_is_valid(name, LOG_ERR);
404}
405
406static int prompt_timezone(void) {
407 _cleanup_strv_free_ char **zones = NULL;
408 int r;
409
410 if (arg_timezone)
411 return 0;
412
413 if (!arg_prompt_timezone)
414 return 0;
415
416 r = get_timezones(&zones);
417 if (r < 0)
418 return log_error_errno(r, "Cannot query timezone list: %m");
419
420 print_welcome();
421
422 r = prompt_loop("Please enter timezone name or number",
423 zones, 30, timezone_is_valid_log_error, &arg_timezone);
424 if (r < 0)
425 return r;
426
427 return 0;
428}
429
430static int process_timezone(void) {
431 const char *etc_localtime, *e;
432 int r;
433
434 etc_localtime = prefix_roota(arg_root, "/etc/localtime");
435 if (laccess(etc_localtime, F_OK) >= 0 && !arg_force)
436 return 0;
437
438 if (arg_copy_timezone && arg_root) {
439 _cleanup_free_ char *p = NULL;
440
441 r = readlink_malloc("/etc/localtime", &p);
442 if (r != -ENOENT) {
443 if (r < 0)
444 return log_error_errno(r, "Failed to read host timezone: %m");
445
446 (void) mkdir_parents(etc_localtime, 0755);
447 if (symlink(p, etc_localtime) < 0)
448 return log_error_errno(errno, "Failed to create %s symlink: %m", etc_localtime);
449
450 log_info("%s copied.", etc_localtime);
451 return 0;
452 }
453 }
454
455 r = prompt_timezone();
456 if (r < 0)
457 return r;
458
459 if (isempty(arg_timezone))
460 return 0;
461
462 e = strjoina("../usr/share/zoneinfo/", arg_timezone);
463
464 (void) mkdir_parents(etc_localtime, 0755);
465 if (symlink(e, etc_localtime) < 0)
466 return log_error_errno(errno, "Failed to create %s symlink: %m", etc_localtime);
467
468 log_info("%s written", etc_localtime);
469 return 0;
470}
471
472static int prompt_hostname(void) {
473 int r;
474
475 if (arg_hostname)
476 return 0;
477
478 if (!arg_prompt_hostname)
479 return 0;
480
481 print_welcome();
482 putchar('\n');
483
484 for (;;) {
485 _cleanup_free_ char *h = NULL;
486
487 r = ask_string(&h, "%s Please enter hostname for new system (empty to skip): ", special_glyph(SPECIAL_GLYPH_TRIANGULAR_BULLET));
488 if (r < 0)
489 return log_error_errno(r, "Failed to query hostname: %m");
490
491 if (isempty(h)) {
492 log_warning("No hostname entered, skipping.");
493 break;
494 }
495
496 if (!hostname_is_valid(h, true)) {
497 log_error("Specified hostname invalid.");
498 continue;
499 }
500
501 /* Get rid of the trailing dot that we allow, but don't want to see */
502 arg_hostname = hostname_cleanup(h);
503 h = NULL;
504 break;
505 }
506
507 return 0;
508}
509
510static int process_hostname(void) {
511 const char *etc_hostname;
512 int r;
513
514 etc_hostname = prefix_roota(arg_root, "/etc/hostname");
515 if (laccess(etc_hostname, F_OK) >= 0 && !arg_force)
516 return 0;
517
518 r = prompt_hostname();
519 if (r < 0)
520 return r;
521
522 if (isempty(arg_hostname))
523 return 0;
524
525 r = write_string_file(etc_hostname, arg_hostname,
526 WRITE_STRING_FILE_CREATE | WRITE_STRING_FILE_SYNC | WRITE_STRING_FILE_MKDIR_0755 |
527 (arg_force ? WRITE_STRING_FILE_ATOMIC : 0));
528 if (r < 0)
529 return log_error_errno(r, "Failed to write %s: %m", etc_hostname);
530
531 log_info("%s written.", etc_hostname);
532 return 0;
533}
534
535static int process_machine_id(void) {
536 const char *etc_machine_id;
537 char id[SD_ID128_STRING_MAX];
538 int r;
539
540 etc_machine_id = prefix_roota(arg_root, "/etc/machine-id");
541 if (laccess(etc_machine_id, F_OK) >= 0 && !arg_force)
542 return 0;
543
544 if (sd_id128_is_null(arg_machine_id))
545 return 0;
546
547 r = write_string_file(etc_machine_id, sd_id128_to_string(arg_machine_id, id),
548 WRITE_STRING_FILE_CREATE | WRITE_STRING_FILE_SYNC | WRITE_STRING_FILE_MKDIR_0755 |
549 (arg_force ? WRITE_STRING_FILE_ATOMIC : 0));
550 if (r < 0)
551 return log_error_errno(r, "Failed to write machine id: %m");
552
553 log_info("%s written.", etc_machine_id);
554 return 0;
555}
556
557static int prompt_root_password(void) {
558 const char *msg1, *msg2;
559 int r;
560
561 if (arg_root_password)
562 return 0;
563
564 if (!arg_prompt_root_password)
565 return 0;
566
567 print_welcome();
568 putchar('\n');
569
570 msg1 = strjoina(special_glyph(SPECIAL_GLYPH_TRIANGULAR_BULLET), " Please enter a new root password (empty to skip):");
571 msg2 = strjoina(special_glyph(SPECIAL_GLYPH_TRIANGULAR_BULLET), " Please enter new root password again:");
572
573 for (;;) {
574 _cleanup_strv_free_erase_ char **a = NULL, **b = NULL;
575
576 r = ask_password_tty(-1, msg1, NULL, 0, 0, NULL, &a);
577 if (r < 0)
578 return log_error_errno(r, "Failed to query root password: %m");
579 if (strv_length(a) != 1)
580 return log_error_errno(SYNTHETIC_ERRNO(EIO),
581 "Received multiple passwords, where we expected one.");
582
583 if (isempty(*a)) {
584 log_warning("No password entered, skipping.");
585 break;
586 }
587
588 r = ask_password_tty(-1, msg2, NULL, 0, 0, NULL, &b);
589 if (r < 0)
590 return log_error_errno(r, "Failed to query root password: %m");
591 if (strv_length(b) != 1)
592 return log_error_errno(SYNTHETIC_ERRNO(EIO),
593 "Received multiple passwords, where we expected one.");
594
595 if (!streq(*a, *b)) {
596 log_error("Entered passwords did not match, please try again.");
597 continue;
598 }
599
600 arg_root_password = TAKE_PTR(*a);
601 break;
602 }
603
604 return 0;
605}
606
607static int find_shell(const char *path, const char *root) {
608 int r;
609
610 assert(path);
611
612 if (!valid_shell(path))
613 return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "%s is not a valid shell", path);
614
615 r = chase_symlinks(path, root, CHASE_PREFIX_ROOT, NULL, NULL);
616 if (r < 0) {
617 const char *p;
618 p = prefix_roota(root, path);
619 return log_error_errno(r, "Failed to resolve shell %s: %m", p);
620 }
621
622 return 0;
623}
624
625static int prompt_root_shell(void) {
626 int r;
627
628 if (arg_root_shell || !arg_prompt_root_shell)
629 return 0;
630
631 print_welcome();
632 putchar('\n');
633
634 for (;;) {
635 _cleanup_free_ char *s = NULL;
636
637 r = ask_string(&s, "%s Please enter root shell for new system (empty to skip): ", special_glyph(SPECIAL_GLYPH_TRIANGULAR_BULLET));
638 if (r < 0)
639 return log_error_errno(r, "Failed to query root shell: %m");
640
641 if (isempty(s)) {
642 log_warning("No shell entered, skipping.");
643 break;
644 }
645
646 r = find_shell(s, arg_root);
647 if (r < 0)
648 continue;
649
650 arg_root_shell = TAKE_PTR(s);
651 break;
652 }
653
654 return 0;
655}
656
657static int write_root_passwd(const char *passwd_path, const char *password, const char *shell) {
658 _cleanup_fclose_ FILE *original = NULL, *passwd = NULL;
659 _cleanup_(unlink_and_freep) char *passwd_tmp = NULL;
660 int r;
661
662 assert(password);
663
664 r = fopen_temporary_label("/etc/passwd", passwd_path, &passwd, &passwd_tmp);
665 if (r < 0)
666 return r;
667
668 original = fopen(passwd_path, "re");
669 if (original) {
670 struct passwd *i;
671
672 r = sync_rights(fileno(original), fileno(passwd));
673 if (r < 0)
674 return r;
675
676 while ((r = fgetpwent_sane(original, &i)) > 0) {
677
678 if (streq(i->pw_name, "root")) {
679 i->pw_passwd = (char *) password;
680 if (shell)
681 i->pw_shell = (char *) shell;
682 }
683
684 r = putpwent_sane(i, passwd);
685 if (r < 0)
686 return r;
687 }
688 if (r < 0)
689 return r;
690
691 } else {
692 struct passwd root = {
693 .pw_name = (char *) "root",
694 .pw_passwd = (char *) password,
695 .pw_uid = 0,
696 .pw_gid = 0,
697 .pw_gecos = (char *) "Super User",
698 .pw_dir = (char *) "/root",
699 .pw_shell = (char *) (shell ?: "/bin/sh"),
700 };
701
702 if (errno != ENOENT)
703 return -errno;
704
705 r = fchmod(fileno(passwd), 0644);
706 if (r < 0)
707 return -errno;
708
709 r = putpwent_sane(&root, passwd);
710 if (r < 0)
711 return r;
712 }
713
714 r = fflush_sync_and_check(passwd);
715 if (r < 0)
716 return r;
717
718 r = rename_and_apply_smack_floor_label(passwd_tmp, passwd_path);
719 if (r < 0)
720 return r;
721
722 return 0;
723}
724
725static int write_root_shadow(const char *shadow_path, const char *hashed_password) {
726 _cleanup_fclose_ FILE *original = NULL, *shadow = NULL;
727 _cleanup_(unlink_and_freep) char *shadow_tmp = NULL;
728 int r;
729
730 assert(hashed_password);
731
732 r = fopen_temporary_label("/etc/shadow", shadow_path, &shadow, &shadow_tmp);
733 if (r < 0)
734 return r;
735
736 original = fopen(shadow_path, "re");
737 if (original) {
738 struct spwd *i;
739
740 r = sync_rights(fileno(original), fileno(shadow));
741 if (r < 0)
742 return r;
743
744 while ((r = fgetspent_sane(original, &i)) > 0) {
745
746 if (streq(i->sp_namp, "root")) {
747 i->sp_pwdp = (char *) hashed_password;
748 i->sp_lstchg = (long) (now(CLOCK_REALTIME) / USEC_PER_DAY);
749 }
750
751 r = putspent_sane(i, shadow);
752 if (r < 0)
753 return r;
754 }
755 if (r < 0)
756 return r;
757
758 } else {
759 struct spwd root = {
760 .sp_namp = (char*) "root",
761 .sp_pwdp = (char *) hashed_password,
762 .sp_lstchg = (long) (now(CLOCK_REALTIME) / USEC_PER_DAY),
763 .sp_min = -1,
764 .sp_max = -1,
765 .sp_warn = -1,
766 .sp_inact = -1,
767 .sp_expire = -1,
768 .sp_flag = (unsigned long) -1, /* this appears to be what everybody does ... */
769 };
770
771 if (errno != ENOENT)
772 return -errno;
773
774 r = fchmod(fileno(shadow), 0000);
775 if (r < 0)
776 return -errno;
777
778 r = putspent_sane(&root, shadow);
779 if (r < 0)
780 return r;
781 }
782
783 r = fflush_sync_and_check(shadow);
784 if (r < 0)
785 return r;
786
787 r = rename_and_apply_smack_floor_label(shadow_tmp, shadow_path);
788 if (r < 0)
789 return r;
790
791 return 0;
792}
793
794static int process_root_args(void) {
795 _cleanup_close_ int lock = -1;
796 struct crypt_data cd = {};
797 const char *password, *hashed_password;
798 const char *etc_passwd, *etc_shadow;
799 int r;
800
801 etc_passwd = prefix_roota(arg_root, "/etc/passwd");
802 etc_shadow = prefix_roota(arg_root, "/etc/shadow");
803
804 /* We only mess with passwd and shadow if both do not exist or --force is specified. These files are
805 * tightly coupled and hence we make sure we have permission from the user to create/modify both
806 * files. */
807 if ((laccess(etc_passwd, F_OK) >= 0 || laccess(etc_shadow, F_OK) >= 0) && !arg_force)
808 return 0;
809
810 (void) mkdir_parents(etc_passwd, 0755);
811
812 lock = take_etc_passwd_lock(arg_root);
813 if (lock < 0)
814 return log_error_errno(lock, "Failed to take a lock on %s: %m", etc_passwd);
815
816 if (arg_copy_root_shell && arg_root) {
817 struct passwd *p;
818
819 errno = 0;
820 p = getpwnam("root");
821 if (!p)
822 return log_error_errno(errno_or_else(EIO), "Failed to find passwd entry for root: %m");
823
824 r = free_and_strdup(&arg_root_shell, p->pw_shell);
825 if (r < 0)
826 return log_oom();
827 }
828
829 r = prompt_root_shell();
830 if (r < 0)
831 return r;
832
833 if (arg_copy_root_password && arg_root) {
834 struct spwd *p;
835
836 errno = 0;
837 p = getspnam("root");
838 if (!p)
839 return log_error_errno(errno_or_else(EIO), "Failed to find shadow entry for root: %m");
840
841 r = free_and_strdup(&arg_root_password, p->sp_pwdp);
842 if (r < 0)
843 return log_oom();
844
845 arg_root_password_is_hashed = true;
846 }
847
848 r = prompt_root_password();
849 if (r < 0)
850 return r;
851
852 if (arg_root_password && arg_root_password_is_hashed) {
853 password = "x";
854 hashed_password = arg_root_password;
855 } else if (arg_root_password) {
856 _cleanup_free_ char *salt = NULL;
857 /* hashed_password points inside cd after crypt_r returns so cd has function scope. */
858
859 password = "x";
860
861 r = make_salt(&salt);
862 if (r < 0)
863 return log_error_errno(r, "Failed to get salt: %m");
864
865 errno = 0;
866 hashed_password = crypt_r(arg_root_password, salt, &cd);
867 if (!hashed_password)
868 return log_error_errno(errno == 0 ? SYNTHETIC_ERRNO(EINVAL) : errno,
869 "Failed to encrypt password: %m");
870 } else if (arg_delete_root_password)
871 password = hashed_password = "";
872 else
873 password = hashed_password = "!";
874
875 r = write_root_passwd(etc_passwd, password, arg_root_shell);
876 if (r < 0)
877 return log_error_errno(r, "Failed to write %s: %m", etc_passwd);
878
879 log_info("%s written", etc_passwd);
880
881 r = write_root_shadow(etc_shadow, hashed_password);
882 if (r < 0)
883 return log_error_errno(r, "Failed to write %s: %m", etc_shadow);
884
885 log_info("%s written.", etc_shadow);
886 return 0;
887}
888
889static int process_kernel_cmdline(void) {
890 const char *etc_kernel_cmdline;
891 int r;
892
893 etc_kernel_cmdline = prefix_roota(arg_root, "/etc/kernel/cmdline");
894 if (laccess(etc_kernel_cmdline, F_OK) >= 0 && !arg_force)
895 return 0;
896
897 if (!arg_kernel_cmdline)
898 return 0;
899
900 r = write_string_file(etc_kernel_cmdline, arg_kernel_cmdline,
901 WRITE_STRING_FILE_CREATE | WRITE_STRING_FILE_SYNC | WRITE_STRING_FILE_MKDIR_0755 |
902 (arg_force ? WRITE_STRING_FILE_ATOMIC : 0));
903 if (r < 0)
904 return log_error_errno(r, "Failed to write %s: %m", etc_kernel_cmdline);
905
906 log_info("%s written.", etc_kernel_cmdline);
907 return 0;
908}
909
910static int setup_image(char **ret_mount_dir, LoopDevice **ret_loop_device, DecryptedImage **ret_decrypted_image) {
911 DissectImageFlags f = DISSECT_IMAGE_REQUIRE_ROOT|DISSECT_IMAGE_VALIDATE_OS|DISSECT_IMAGE_RELAX_VAR_CHECK|DISSECT_IMAGE_FSCK;
912 _cleanup_(loop_device_unrefp) LoopDevice *d = NULL;
913 _cleanup_(decrypted_image_unrefp) DecryptedImage *decrypted_image = NULL;
914 _cleanup_(dissected_image_unrefp) DissectedImage *dissected_image = NULL;
915 _cleanup_(rmdir_and_freep) char *mount_dir = NULL;
916 _cleanup_free_ char *temp = NULL;
917 int r;
918
919 if (!arg_image) {
920 *ret_mount_dir = NULL;
921 *ret_decrypted_image = NULL;
922 *ret_loop_device = NULL;
923 return 0;
924 }
925
926 assert(!arg_root);
927
928 r = tempfn_random_child(NULL, "firstboot", &temp);
929 if (r < 0)
930 return log_error_errno(r, "Failed to generate temporary mount directory: %m");
931
932 r = loop_device_make_by_path(arg_image, O_RDWR, LO_FLAGS_PARTSCAN, &d);
933 if (r < 0)
934 return log_error_errno(r, "Failed to set up loopback device: %m");
935
936 r = dissect_image_and_warn(d->fd, arg_image, NULL, 0, NULL, f, &dissected_image);
937 if (r < 0)
938 return r;
939
940 r = dissected_image_decrypt_interactively(dissected_image, NULL, NULL, 0, NULL, NULL, NULL, 0, f, &decrypted_image);
941 if (r < 0)
942 return r;
943
944 r = detach_mount_namespace();
945 if (r < 0)
946 return log_error_errno(r, "Failed to detach mount namespace: %m");
947
948 mount_dir = strdup(temp);
949 if (!mount_dir)
950 return log_oom();
951
952 r = mkdir_p(mount_dir, 0700);
953 if (r < 0) {
954 mount_dir = mfree(mount_dir);
955 return log_error_errno(r, "Failed to create mount point: %m");
956 }
957
958 r = dissected_image_mount(dissected_image, mount_dir, UID_INVALID, f);
959 if (r < 0)
960 return log_error_errno(r, "Failed to mount image: %m");
961
962 if (decrypted_image) {
963 r = decrypted_image_relinquish(decrypted_image);
964 if (r < 0)
965 return log_error_errno(r, "Failed to relinquish DM devices: %m");
966 }
967
968 loop_device_relinquish(d);
969
970 arg_root = TAKE_PTR(temp);
971
972 *ret_mount_dir = TAKE_PTR(mount_dir);
973 *ret_decrypted_image = TAKE_PTR(decrypted_image);
974 *ret_loop_device = TAKE_PTR(d);
975
976 return 1;
977}
978
979static int help(void) {
980 _cleanup_free_ char *link = NULL;
981 int r;
982
983 r = terminal_urlify_man("systemd-firstboot", "1", &link);
984 if (r < 0)
985 return log_oom();
986
987 printf("%s [OPTIONS...]\n\n"
988 "Configures basic settings of the system.\n\n"
989 " -h --help Show this help\n"
990 " --version Show package version\n"
991 " --root=PATH Operate on an alternate filesystem root\n"
992 " --image=PATH Operate on an alternate filesystem image\n"
993 " --locale=LOCALE Set primary locale (LANG=)\n"
994 " --locale-messages=LOCALE Set message locale (LC_MESSAGES=)\n"
995 " --keymap=KEYMAP Set keymap\n"
996 " --timezone=TIMEZONE Set timezone\n"
997 " --hostname=NAME Set hostname\n"
998 " --machine-ID=ID Set machine ID\n"
999 " --root-password=PASSWORD Set root password from plaintext password\n"
1000 " --root-password-file=FILE Set root password from file\n"
1001 " --root-password-hashed=HASHED_PASSWORD Set root password from hashed password\n"
1002 " --root-shell=SHELL Set root shell\n"
1003 " --prompt-locale Prompt the user for locale settings\n"
1004 " --prompt-keymap Prompt the user for keymap settings\n"
1005 " --prompt-timezone Prompt the user for timezone\n"
1006 " --prompt-hostname Prompt the user for hostname\n"
1007 " --prompt-root-password Prompt the user for root password\n"
1008 " --prompt-root-shell Prompt the user for root shell\n"
1009 " --prompt Prompt for all of the above\n"
1010 " --copy-locale Copy locale from host\n"
1011 " --copy-keymap Copy keymap from host\n"
1012 " --copy-timezone Copy timezone from host\n"
1013 " --copy-root-password Copy root password from host\n"
1014 " --copy-root-shell Copy root shell from host\n"
1015 " --copy Copy locale, keymap, timezone, root password\n"
1016 " --setup-machine-id Generate a new random machine ID\n"
1017 " --force Overwrite existing files\n"
1018 " --delete-root-password Delete root password\n"
1019 " --welcome=no Disable the welcome text\n"
1020 "\nSee the %s for details.\n"
1021 , program_invocation_short_name
1022 , link
1023 );
1024
1025 return 0;
1026}
1027
1028static int parse_argv(int argc, char *argv[]) {
1029
1030 enum {
1031 ARG_VERSION = 0x100,
1032 ARG_ROOT,
1033 ARG_IMAGE,
1034 ARG_LOCALE,
1035 ARG_LOCALE_MESSAGES,
1036 ARG_KEYMAP,
1037 ARG_TIMEZONE,
1038 ARG_HOSTNAME,
1039 ARG_MACHINE_ID,
1040 ARG_ROOT_PASSWORD,
1041 ARG_ROOT_PASSWORD_FILE,
1042 ARG_ROOT_PASSWORD_HASHED,
1043 ARG_ROOT_SHELL,
1044 ARG_KERNEL_COMMAND_LINE,
1045 ARG_PROMPT,
1046 ARG_PROMPT_LOCALE,
1047 ARG_PROMPT_KEYMAP,
1048 ARG_PROMPT_TIMEZONE,
1049 ARG_PROMPT_HOSTNAME,
1050 ARG_PROMPT_ROOT_PASSWORD,
1051 ARG_PROMPT_ROOT_SHELL,
1052 ARG_COPY,
1053 ARG_COPY_LOCALE,
1054 ARG_COPY_KEYMAP,
1055 ARG_COPY_TIMEZONE,
1056 ARG_COPY_ROOT_PASSWORD,
1057 ARG_COPY_ROOT_SHELL,
1058 ARG_SETUP_MACHINE_ID,
1059 ARG_FORCE,
1060 ARG_DELETE_ROOT_PASSWORD,
1061 ARG_WELCOME,
1062 };
1063
1064 static const struct option options[] = {
1065 { "help", no_argument, NULL, 'h' },
1066 { "version", no_argument, NULL, ARG_VERSION },
1067 { "root", required_argument, NULL, ARG_ROOT },
1068 { "image", required_argument, NULL, ARG_IMAGE },
1069 { "locale", required_argument, NULL, ARG_LOCALE },
1070 { "locale-messages", required_argument, NULL, ARG_LOCALE_MESSAGES },
1071 { "keymap", required_argument, NULL, ARG_KEYMAP },
1072 { "timezone", required_argument, NULL, ARG_TIMEZONE },
1073 { "hostname", required_argument, NULL, ARG_HOSTNAME },
1074 { "machine-id", required_argument, NULL, ARG_MACHINE_ID },
1075 { "root-password", required_argument, NULL, ARG_ROOT_PASSWORD },
1076 { "root-password-file", required_argument, NULL, ARG_ROOT_PASSWORD_FILE },
1077 { "root-password-hashed", required_argument, NULL, ARG_ROOT_PASSWORD_HASHED },
1078 { "root-shell", required_argument, NULL, ARG_ROOT_SHELL },
1079 { "kernel-command-line", required_argument, NULL, ARG_KERNEL_COMMAND_LINE },
1080 { "prompt", no_argument, NULL, ARG_PROMPT },
1081 { "prompt-locale", no_argument, NULL, ARG_PROMPT_LOCALE },
1082 { "prompt-keymap", no_argument, NULL, ARG_PROMPT_KEYMAP },
1083 { "prompt-timezone", no_argument, NULL, ARG_PROMPT_TIMEZONE },
1084 { "prompt-hostname", no_argument, NULL, ARG_PROMPT_HOSTNAME },
1085 { "prompt-root-password", no_argument, NULL, ARG_PROMPT_ROOT_PASSWORD },
1086 { "prompt-root-shell", no_argument, NULL, ARG_PROMPT_ROOT_SHELL },
1087 { "copy", no_argument, NULL, ARG_COPY },
1088 { "copy-locale", no_argument, NULL, ARG_COPY_LOCALE },
1089 { "copy-keymap", no_argument, NULL, ARG_COPY_KEYMAP },
1090 { "copy-timezone", no_argument, NULL, ARG_COPY_TIMEZONE },
1091 { "copy-root-password", no_argument, NULL, ARG_COPY_ROOT_PASSWORD },
1092 { "copy-root-shell", no_argument, NULL, ARG_COPY_ROOT_SHELL },
1093 { "setup-machine-id", no_argument, NULL, ARG_SETUP_MACHINE_ID },
1094 { "force", no_argument, NULL, ARG_FORCE },
1095 { "delete-root-password", no_argument, NULL, ARG_DELETE_ROOT_PASSWORD },
1096 { "welcome", required_argument, NULL, ARG_WELCOME },
1097 {}
1098 };
1099
1100 int r, c;
1101
1102 assert(argc >= 0);
1103 assert(argv);
1104
1105 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
1106
1107 switch (c) {
1108
1109 case 'h':
1110 return help();
1111
1112 case ARG_VERSION:
1113 return version();
1114
1115 case ARG_ROOT:
1116 r = parse_path_argument_and_warn(optarg, true, &arg_root);
1117 if (r < 0)
1118 return r;
1119 break;
1120
1121 case ARG_IMAGE:
1122 r = parse_path_argument_and_warn(optarg, false, &arg_image);
1123 if (r < 0)
1124 return r;
1125 break;
1126
1127 case ARG_LOCALE:
1128 r = free_and_strdup(&arg_locale, optarg);
1129 if (r < 0)
1130 return log_oom();
1131
1132 break;
1133
1134 case ARG_LOCALE_MESSAGES:
1135 r = free_and_strdup(&arg_locale_messages, optarg);
1136 if (r < 0)
1137 return log_oom();
1138
1139 break;
1140
1141 case ARG_KEYMAP:
1142 if (!keymap_is_valid(optarg))
1143 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1144 "Keymap %s is not valid.", optarg);
1145
1146 r = free_and_strdup(&arg_keymap, optarg);
1147 if (r < 0)
1148 return log_oom();
1149
1150 break;
1151
1152 case ARG_TIMEZONE:
1153 if (!timezone_is_valid(optarg, LOG_ERR))
1154 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1155 "Timezone %s is not valid.", optarg);
1156
1157 r = free_and_strdup(&arg_timezone, optarg);
1158 if (r < 0)
1159 return log_oom();
1160
1161 break;
1162
1163 case ARG_ROOT_PASSWORD:
1164 r = free_and_strdup(&arg_root_password, optarg);
1165 if (r < 0)
1166 return log_oom();
1167
1168 arg_root_password_is_hashed = false;
1169 break;
1170
1171 case ARG_ROOT_PASSWORD_FILE:
1172 arg_root_password = mfree(arg_root_password);
1173
1174 r = read_one_line_file(optarg, &arg_root_password);
1175 if (r < 0)
1176 return log_error_errno(r, "Failed to read %s: %m", optarg);
1177
1178 arg_root_password_is_hashed = false;
1179 break;
1180
1181 case ARG_ROOT_PASSWORD_HASHED:
1182 r = free_and_strdup(&arg_root_password, optarg);
1183 if (r < 0)
1184 return log_oom();
1185
1186 arg_root_password_is_hashed = true;
1187 break;
1188
1189 case ARG_ROOT_SHELL:
1190 r = find_shell(optarg, arg_root);
1191 if (r < 0)
1192 return r;
1193
1194 r = free_and_strdup(&arg_root_shell, optarg);
1195 if (r < 0)
1196 return log_oom();
1197
1198 break;
1199
1200 case ARG_HOSTNAME:
1201 if (!hostname_is_valid(optarg, true))
1202 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1203 "Host name %s is not valid.", optarg);
1204
1205 hostname_cleanup(optarg);
1206 r = free_and_strdup(&arg_hostname, optarg);
1207 if (r < 0)
1208 return log_oom();
1209
1210 break;
1211
1212 case ARG_MACHINE_ID:
1213 if (sd_id128_from_string(optarg, &arg_machine_id) < 0)
1214 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1215 "Failed to parse machine id %s.", optarg);
1216
1217 break;
1218
1219 case ARG_KERNEL_COMMAND_LINE:
1220 r = free_and_strdup(&arg_kernel_cmdline, optarg);
1221 if (r < 0)
1222 return log_oom();
1223
1224 break;
1225
1226 case ARG_PROMPT:
1227 arg_prompt_locale = arg_prompt_keymap = arg_prompt_timezone = arg_prompt_hostname =
1228 arg_prompt_root_password = arg_prompt_root_shell = true;
1229 break;
1230
1231 case ARG_PROMPT_LOCALE:
1232 arg_prompt_locale = true;
1233 break;
1234
1235 case ARG_PROMPT_KEYMAP:
1236 arg_prompt_keymap = true;
1237 break;
1238
1239 case ARG_PROMPT_TIMEZONE:
1240 arg_prompt_timezone = true;
1241 break;
1242
1243 case ARG_PROMPT_HOSTNAME:
1244 arg_prompt_hostname = true;
1245 break;
1246
1247 case ARG_PROMPT_ROOT_PASSWORD:
1248 arg_prompt_root_password = true;
1249 break;
1250
1251 case ARG_PROMPT_ROOT_SHELL:
1252 arg_prompt_root_shell = true;
1253 break;
1254
1255 case ARG_COPY:
1256 arg_copy_locale = arg_copy_keymap = arg_copy_timezone = arg_copy_root_password =
1257 arg_copy_root_shell = true;
1258 break;
1259
1260 case ARG_COPY_LOCALE:
1261 arg_copy_locale = true;
1262 break;
1263
1264 case ARG_COPY_KEYMAP:
1265 arg_copy_keymap = true;
1266 break;
1267
1268 case ARG_COPY_TIMEZONE:
1269 arg_copy_timezone = true;
1270 break;
1271
1272 case ARG_COPY_ROOT_PASSWORD:
1273 arg_copy_root_password = true;
1274 break;
1275
1276 case ARG_COPY_ROOT_SHELL:
1277 arg_copy_root_shell = true;
1278 break;
1279
1280 case ARG_SETUP_MACHINE_ID:
1281 r = sd_id128_randomize(&arg_machine_id);
1282 if (r < 0)
1283 return log_error_errno(r, "Failed to generate randomized machine ID: %m");
1284
1285 break;
1286
1287 case ARG_FORCE:
1288 arg_force = true;
1289 break;
1290
1291 case ARG_DELETE_ROOT_PASSWORD:
1292 arg_delete_root_password = true;
1293 break;
1294
1295 case ARG_WELCOME:
1296 r = parse_boolean(optarg);
1297 if (r < 0)
1298 return log_error_errno(r, "Failed to parse --welcome= argument: %s", optarg);
1299
1300 arg_welcome = r;
1301 break;
1302
1303 case '?':
1304 return -EINVAL;
1305
1306 default:
1307 assert_not_reached("Unhandled option");
1308 }
1309
1310 /* We check if the specified locale strings are valid down here, so that we can take --root= into
1311 * account when looking for the locale files. */
1312
1313 if (arg_locale && !locale_is_ok(arg_locale))
1314 return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Locale %s is not installed.", arg_locale);
1315 if (arg_locale_messages && !locale_is_ok(arg_locale_messages))
1316 return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Locale %s is not installed.", arg_locale_messages);
1317
1318 if (arg_delete_root_password && (arg_copy_root_password || arg_root_password || arg_prompt_root_password))
1319 return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
1320 "--delete-root-password cannot be combined with other root password options");
1321
1322 if (arg_image && arg_root)
1323 return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Please specify either --root= or --image=, the combination of both is not supported.");
1324
1325 return 1;
1326}
1327
1328static int run(int argc, char *argv[]) {
1329 _cleanup_(loop_device_unrefp) LoopDevice *loop_device = NULL;
1330 _cleanup_(decrypted_image_unrefp) DecryptedImage *decrypted_image = NULL;
1331 _cleanup_(umount_and_rmdir_and_freep) char *unlink_dir = NULL;
1332 int r;
1333
1334 r = parse_argv(argc, argv);
1335 if (r <= 0)
1336 return r;
1337
1338 log_setup_service();
1339
1340 umask(0022);
1341
1342 if (!arg_root && !arg_image) {
1343 bool enabled;
1344
1345 /* If we are called without --root=/--image= let's honour the systemd.firstboot kernel
1346 * command line option, because we are called to provision the host with basic settings (as
1347 * opposed to some other file system tree/image) */
1348
1349 r = proc_cmdline_get_bool("systemd.firstboot", &enabled);
1350 if (r < 0)
1351 return log_error_errno(r, "Failed to parse systemd.firstboot= kernel command line argument, ignoring: %m");
1352 if (r > 0 && !enabled)
1353 return 0; /* disabled */
1354 }
1355
1356 r = setup_image(&unlink_dir, &loop_device, &decrypted_image);
1357 if (r < 0)
1358 return r;
1359
1360 r = process_locale();
1361 if (r < 0)
1362 return r;
1363
1364 r = process_keymap();
1365 if (r < 0)
1366 return r;
1367
1368 r = process_timezone();
1369 if (r < 0)
1370 return r;
1371
1372 r = process_hostname();
1373 if (r < 0)
1374 return r;
1375
1376 r = process_machine_id();
1377 if (r < 0)
1378 return r;
1379
1380 r = process_root_args();
1381 if (r < 0)
1382 return r;
1383
1384 r = process_kernel_cmdline();
1385 if (r < 0)
1386 return r;
1387
1388 return 0;
1389}
1390
1391DEFINE_MAIN_FUNCTION(run);
Unnamed repository; edit this file 'description' to name the repository.