2 This file is part of systemd.
4 Copyright 2017 Zbigniew Jędrzejewski-Szmek
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
21 #include <linux/magic.h>
23 #include "alloc-util.h"
24 #include "blkid-util.h"
26 #include "conf-files.h"
28 #include "device-nodes.h"
32 #include "parse-util.h"
33 #include "stat-util.h"
34 #include "string-util.h"
38 void boot_entry_free(BootEntry
*entry
) {
39 free(entry
->filename
);
42 free(entry
->show_title
);
44 free(entry
->machine_id
);
45 free(entry
->architecture
);
46 strv_free(entry
->options
);
49 strv_free(entry
->initrd
);
50 free(entry
->device_tree
);
53 int boot_entry_load(const char *path
, BootEntry
*entry
) {
54 _cleanup_fclose_
FILE *f
= NULL
;
56 _cleanup_(boot_entry_free
) BootEntry tmp
= {};
59 f
= fopen(path
, "re");
61 return log_error_errno(errno
, "Failed to open \"%s\": %m", path
);
63 tmp
.filename
= strdup(basename(path
));
68 _cleanup_free_
char *buf
= NULL
;
71 r
= read_line(f
, LONG_LINE_MAX
, &buf
);
75 return log_error_errno(r
, "%s:%u: Line too long", path
, line
);
77 return log_error_errno(r
, "%s:%u: Error while reading: %m", path
, line
);
81 if (IN_SET(*strstrip(buf
), '#', '\0'))
86 log_warning("%s:%u: Bad syntax", path
, line
);
92 if (streq(buf
, "title"))
93 r
= free_and_strdup(&tmp
.title
, p
);
94 else if (streq(buf
, "version"))
95 r
= free_and_strdup(&tmp
.version
, p
);
96 else if (streq(buf
, "machine-id"))
97 r
= free_and_strdup(&tmp
.machine_id
, p
);
98 else if (streq(buf
, "architecture"))
99 r
= free_and_strdup(&tmp
.architecture
, p
);
100 else if (streq(buf
, "options"))
101 r
= strv_extend(&tmp
.options
, p
);
102 else if (streq(buf
, "linux"))
103 r
= free_and_strdup(&tmp
.kernel
, p
);
104 else if (streq(buf
, "efi"))
105 r
= free_and_strdup(&tmp
.efi
, p
);
106 else if (streq(buf
, "initrd"))
107 r
= strv_extend(&tmp
.initrd
, p
);
108 else if (streq(buf
, "devicetree"))
109 r
= free_and_strdup(&tmp
.device_tree
, p
);
111 log_notice("%s:%u: Unknown line \"%s\"", path
, line
, buf
);
115 return log_error_errno(r
, "%s:%u: Error while reading: %m", path
, line
);
119 tmp
= (BootEntry
) {};
123 void boot_config_free(BootConfig
*config
) {
126 free(config
->default_pattern
);
127 free(config
->timeout
);
128 free(config
->editor
);
130 free(config
->entry_oneshot
);
131 free(config
->entry_default
);
133 for (i
= 0; i
< config
->n_entries
; i
++)
134 boot_entry_free(config
->entries
+ i
);
135 free(config
->entries
);
138 int boot_loader_read_conf(const char *path
, BootConfig
*config
) {
139 _cleanup_fclose_
FILE *f
= NULL
;
143 f
= fopen(path
, "re");
145 return log_error_errno(errno
, "Failed to open \"%s\": %m", path
);
148 _cleanup_free_
char *buf
= NULL
;
151 r
= read_line(f
, LONG_LINE_MAX
, &buf
);
155 return log_error_errno(r
, "%s:%u: Line too long", path
, line
);
157 return log_error_errno(r
, "%s:%u: Error while reading: %m", path
, line
);
161 if (IN_SET(*strstrip(buf
), '#', '\0'))
164 p
= strchr(buf
, ' ');
166 log_warning("%s:%u: Bad syntax", path
, line
);
172 if (streq(buf
, "default"))
173 r
= free_and_strdup(&config
->default_pattern
, p
);
174 else if (streq(buf
, "timeout"))
175 r
= free_and_strdup(&config
->timeout
, p
);
176 else if (streq(buf
, "editor"))
177 r
= free_and_strdup(&config
->editor
, p
);
179 log_notice("%s:%u: Unknown line \"%s\"", path
, line
, buf
);
183 return log_error_errno(r
, "%s:%u: Error while reading: %m", path
, line
);
189 /* This is a direct translation of str_verscmp from boot.c */
190 static bool is_digit(int c
) {
191 return c
>= '0' && c
<= '9';
194 static int c_order(int c
) {
199 else if ((c
>= 'a') && (c
<= 'z'))
205 static int str_verscmp(const char *s1
, const char *s2
) {
206 const char *os1
= s1
;
207 const char *os2
= s2
;
212 while ((*s1
&& !is_digit(*s1
)) || (*s2
&& !is_digit(*s2
))) {
215 order
= c_order(*s1
) - c_order(*s2
);
228 while (is_digit(*s1
) && is_digit(*s2
)) {
244 return strcmp(os1
, os2
);
247 static int boot_entry_compare(const void *a
, const void *b
) {
248 const BootEntry
*aa
= a
;
249 const BootEntry
*bb
= b
;
251 return str_verscmp(aa
->filename
, bb
->filename
);
254 int boot_entries_find(const char *dir
, BootEntry
**entries
, size_t *n_entries
) {
255 _cleanup_strv_free_
char **files
= NULL
;
259 BootEntry
*array
= NULL
;
260 size_t n_allocated
= 0, n
= 0;
262 r
= conf_files_list(&files
, ".conf", NULL
, 0, dir
, NULL
);
264 return log_error_errno(r
, "Failed to list files in \"%s\": %m", dir
);
266 STRV_FOREACH(f
, files
) {
267 if (!GREEDY_REALLOC0(array
, n_allocated
, n
+ 1))
270 r
= boot_entry_load(*f
, array
+ n
);
277 qsort_safe(array
, n
, sizeof(BootEntry
), boot_entry_compare
);
284 static bool find_nonunique(BootEntry
*entries
, size_t n_entries
, bool *arr
) {
286 bool non_unique
= false;
288 for (i
= 0; i
< n_entries
; i
++)
291 for (i
= 0; i
< n_entries
; i
++)
292 for (j
= 0; j
< n_entries
; j
++)
293 if (i
!= j
&& streq(boot_entry_title(entries
+ i
),
294 boot_entry_title(entries
+ j
)))
295 non_unique
= arr
[i
] = arr
[j
] = true;
300 static int boot_entries_uniquify(BootEntry
*entries
, size_t n_entries
) {
306 /* Find _all_ non-unique titles */
307 if (!find_nonunique(entries
, n_entries
, arr
))
310 /* Add version to non-unique titles */
311 for (i
= 0; i
< n_entries
; i
++)
312 if (arr
[i
] && entries
[i
].version
) {
313 r
= asprintf(&s
, "%s (%s)", boot_entry_title(entries
+ i
), entries
[i
].version
);
317 free_and_replace(entries
[i
].show_title
, s
);
320 if (!find_nonunique(entries
, n_entries
, arr
))
323 /* Add machine-id to non-unique titles */
324 for (i
= 0; i
< n_entries
; i
++)
325 if (arr
[i
] && entries
[i
].machine_id
) {
326 r
= asprintf(&s
, "%s (%s)", boot_entry_title(entries
+ i
), entries
[i
].machine_id
);
330 free_and_replace(entries
[i
].show_title
, s
);
333 if (!find_nonunique(entries
, n_entries
, arr
))
336 /* Add file name to non-unique titles */
337 for (i
= 0; i
< n_entries
; i
++)
339 r
= asprintf(&s
, "%s (%s)", boot_entry_title(entries
+ i
), entries
[i
].filename
);
343 free_and_replace(entries
[i
].show_title
, s
);
349 int boot_entries_select_default(const BootConfig
*config
) {
352 if (config
->entry_oneshot
)
353 for (i
= config
->n_entries
- 1; i
>= 0; i
--)
354 if (streq(config
->entry_oneshot
, config
->entries
[i
].filename
)) {
355 log_debug("Found default: filename \"%s\" is matched by LoaderEntryOneShot",
356 config
->entries
[i
].filename
);
360 if (config
->entry_default
)
361 for (i
= config
->n_entries
- 1; i
>= 0; i
--)
362 if (streq(config
->entry_default
, config
->entries
[i
].filename
)) {
363 log_debug("Found default: filename \"%s\" is matched by LoaderEntryDefault",
364 config
->entries
[i
].filename
);
368 if (config
->default_pattern
)
369 for (i
= config
->n_entries
- 1; i
>= 0; i
--)
370 if (fnmatch(config
->default_pattern
, config
->entries
[i
].filename
, FNM_CASEFOLD
) == 0) {
371 log_debug("Found default: filename \"%s\" is matched by pattern \"%s\"",
372 config
->entries
[i
].filename
, config
->default_pattern
);
376 if (config
->n_entries
> 0)
377 log_debug("Found default: last entry \"%s\"", config
->entries
[i
].filename
);
379 log_debug("Found no default boot entry :(");
380 return config
->n_entries
- 1; /* -1 means "no default" */
383 int boot_entries_load_config(const char *esp_path
, BootConfig
*config
) {
387 p
= strjoina(esp_path
, "/loader/loader.conf");
388 r
= boot_loader_read_conf(p
, config
);
390 return log_error_errno(r
, "Failed to read boot config from \"%s\": %m", p
);
392 p
= strjoina(esp_path
, "/loader/entries");
393 r
= boot_entries_find(p
, &config
->entries
, &config
->n_entries
);
395 return log_error_errno(r
, "Failed to read boot entries from \"%s\": %m", p
);
397 r
= boot_entries_uniquify(config
->entries
, config
->n_entries
);
399 return log_error_errno(r
, "Failed to uniquify boot entries: %m");
401 r
= efi_get_variable_string(EFI_VENDOR_LOADER
, "LoaderEntryOneShot", &config
->entry_oneshot
);
402 if (r
< 0 && r
!= -ENOENT
)
403 return log_error_errno(r
, "Failed to read EFI var \"LoaderEntryOneShot\": %m");
405 r
= efi_get_variable_string(EFI_VENDOR_LOADER
, "LoaderEntryDefault", &config
->entry_default
);
406 if (r
< 0 && r
!= -ENOENT
)
407 return log_error_errno(r
, "Failed to read EFI var \"LoaderEntryDefault\": %m");
409 config
->default_entry
= boot_entries_select_default(config
);
413 /********************************************************************************/
415 static int verify_esp(
419 uint64_t *ret_pstart
,
421 sd_id128_t
*ret_uuid
) {
423 _cleanup_blkid_free_probe_ blkid_probe b
= NULL
;
424 char t
[DEV_NUM_PATH_MAX
];
425 uint64_t pstart
= 0, psize
= 0;
429 sd_id128_t uuid
= SD_ID128_NULL
;
436 /* Non-root user can only check the status, so if an error occured in the following,
437 * it does not cause any issues. Let's silence the error messages. */
438 quiet
= geteuid() != 0;
440 if (statfs(p
, &sfs
) < 0) {
441 /* If we are searching for the mount point, don't generate a log message if we can't find the path */
442 if (errno
== ENOENT
&& searching
)
445 return log_full_errno(quiet
&& errno
== EACCES
? LOG_DEBUG
: LOG_ERR
, errno
,
446 "Failed to check file system type of \"%s\": %m", p
);
449 if (!F_TYPE_EQUAL(sfs
.f_type
, MSDOS_SUPER_MAGIC
)) {
451 return -EADDRNOTAVAIL
;
453 log_error("File system \"%s\" is not a FAT EFI System Partition (ESP) file system.", p
);
457 if (stat(p
, &st
) < 0)
458 return log_full_errno(quiet
&& errno
== EACCES
? LOG_DEBUG
: LOG_ERR
, errno
,
459 "Failed to determine block device node of \"%s\": %m", p
);
461 if (major(st
.st_dev
) == 0) {
462 log_error("Block device node of %p is invalid.", p
);
466 t2
= strjoina(p
, "/..");
469 return log_full_errno(quiet
&& errno
== EACCES
? LOG_DEBUG
: LOG_ERR
, errno
,
470 "Failed to determine block device node of parent of \"%s\": %m", p
);
472 if (st
.st_dev
== st2
.st_dev
) {
473 log_error("Directory \"%s\" is not the root of the EFI System Partition (ESP) file system.", p
);
477 /* In a container we don't have access to block devices, skip this part of the verification, we trust the
478 * container manager set everything up correctly on its own. Also skip the following verification for non-root user. */
479 if (detect_container() > 0 || geteuid() != 0)
482 xsprintf_dev_num_path(t
, "block", st
.st_dev
);
484 b
= blkid_new_probe_from_filename(t
);
486 return log_error_errno(errno
?: ENOMEM
, "Failed to open file system \"%s\": %m", p
);
488 blkid_probe_enable_superblocks(b
, 1);
489 blkid_probe_set_superblocks_flags(b
, BLKID_SUBLKS_TYPE
);
490 blkid_probe_enable_partitions(b
, 1);
491 blkid_probe_set_partitions_flags(b
, BLKID_PARTS_ENTRY_DETAILS
);
494 r
= blkid_do_safeprobe(b
);
496 log_error("File system \"%s\" is ambiguous.", p
);
499 log_error("File system \"%s\" does not contain a label.", p
);
502 return log_error_errno(errno
?: EIO
, "Failed to probe file system \"%s\": %m", p
);
505 r
= blkid_probe_lookup_value(b
, "TYPE", &v
, NULL
);
507 return log_error_errno(errno
?: EIO
, "Failed to probe file system type \"%s\": %m", p
);
508 if (!streq(v
, "vfat")) {
509 log_error("File system \"%s\" is not FAT.", p
);
514 r
= blkid_probe_lookup_value(b
, "PART_ENTRY_SCHEME", &v
, NULL
);
516 return log_error_errno(errno
?: EIO
, "Failed to probe partition scheme \"%s\": %m", p
);
517 if (!streq(v
, "gpt")) {
518 log_error("File system \"%s\" is not on a GPT partition table.", p
);
523 r
= blkid_probe_lookup_value(b
, "PART_ENTRY_TYPE", &v
, NULL
);
525 return log_error_errno(errno
?: EIO
, "Failed to probe partition type UUID \"%s\": %m", p
);
526 if (!streq(v
, "c12a7328-f81f-11d2-ba4b-00a0c93ec93b")) {
527 log_error("File system \"%s\" has wrong type for an EFI System Partition (ESP).", p
);
532 r
= blkid_probe_lookup_value(b
, "PART_ENTRY_UUID", &v
, NULL
);
534 return log_error_errno(errno
?: EIO
, "Failed to probe partition entry UUID \"%s\": %m", p
);
535 r
= sd_id128_from_string(v
, &uuid
);
537 log_error("Partition \"%s\" has invalid UUID \"%s\".", p
, v
);
542 r
= blkid_probe_lookup_value(b
, "PART_ENTRY_NUMBER", &v
, NULL
);
544 return log_error_errno(errno
?: EIO
, "Failed to probe partition number \"%s\": m", p
);
545 r
= safe_atou32(v
, &part
);
547 return log_error_errno(r
, "Failed to parse PART_ENTRY_NUMBER field.");
550 r
= blkid_probe_lookup_value(b
, "PART_ENTRY_OFFSET", &v
, NULL
);
552 return log_error_errno(errno
?: EIO
, "Failed to probe partition offset \"%s\": %m", p
);
553 r
= safe_atou64(v
, &pstart
);
555 return log_error_errno(r
, "Failed to parse PART_ENTRY_OFFSET field.");
558 r
= blkid_probe_lookup_value(b
, "PART_ENTRY_SIZE", &v
, NULL
);
560 return log_error_errno(errno
?: EIO
, "Failed to probe partition size \"%s\": %m", p
);
561 r
= safe_atou64(v
, &psize
);
563 return log_error_errno(r
, "Failed to parse PART_ENTRY_SIZE field.");
569 *ret_pstart
= pstart
;
578 int find_esp(char **path
,
579 uint32_t *part
, uint64_t *pstart
, uint64_t *psize
, sd_id128_t
*uuid
) {
585 return verify_esp(false, *path
, part
, pstart
, psize
, uuid
);
587 FOREACH_STRING(p
, "/efi", "/boot", "/boot/efi") {
589 r
= verify_esp(true, p
, part
, pstart
, psize
, uuid
);
590 if (IN_SET(r
, -ENOENT
, -EADDRNOTAVAIL
)) /* This one is not it */