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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
1b992147 | 2 | |
3f6fd1ba | 3 | #include <getopt.h> |
932ad62b | 4 | #include <utmp.h> |
1b992147 | 5 | |
b5efdb8a | 6 | #include "alloc-util.h" |
d6b4d1c7 | 7 | #include "build.h" |
5f465fda | 8 | #include "chase-symlinks.h" |
1b992147 | 9 | #include "conf-files.h" |
28db6fbf | 10 | #include "constants.h" |
1b992147 | 11 | #include "copy.h" |
99e9f896 | 12 | #include "creds-util.h" |
0c3ee127 | 13 | #include "dissect-image.h" |
3fa8a114 | 14 | #include "env-util.h" |
a0f29c76 | 15 | #include "fd-util.h" |
ee228be1 | 16 | #include "fileio.h" |
f97b34a6 | 17 | #include "format-util.h" |
dcd5c891 | 18 | #include "fs-util.h" |
3f6fd1ba | 19 | #include "hashmap.h" |
99e9f896 | 20 | #include "libcrypt-util.h" |
71da1673 | 21 | #include "main-func.h" |
99e9f896 | 22 | #include "memory-util.h" |
0c3ee127 | 23 | #include "mount-util.h" |
d481b830 | 24 | #include "nscd-flush.h" |
dcd5c891 | 25 | #include "pager.h" |
614b022c | 26 | #include "parse-argument.h" |
3f6fd1ba | 27 | #include "path-util.h" |
294bf0c3 | 28 | #include "pretty-print.h" |
3f6fd1ba | 29 | #include "selinux-util.h" |
0c3ee127 | 30 | #include "set.h" |
07630cea | 31 | #include "smack-util.h" |
3f6fd1ba | 32 | #include "specifier.h" |
5f465fda | 33 | #include "stat-util.h" |
07630cea | 34 | #include "string-util.h" |
3f6fd1ba | 35 | #include "strv.h" |
bf819d3a | 36 | #include "sync-util.h" |
e4de7287 | 37 | #include "tmpfile-util-label.h" |
b085d224 | 38 | #include "uid-alloc-range.h" |
3f6fd1ba | 39 | #include "uid-range.h" |
a0f29c76 | 40 | #include "user-util.h" |
3f6fd1ba | 41 | #include "utf8.h" |
1b992147 LP |
42 | |
43 | typedef enum ItemType { | |
9a5af4b7 ZJS |
44 | ADD_USER = 'u', |
45 | ADD_GROUP = 'g', | |
a12b0cc3 | 46 | ADD_MEMBER = 'm', |
9a5af4b7 | 47 | ADD_RANGE = 'r', |
1b992147 | 48 | } ItemType; |
dcd5c891 | 49 | |
9a5af4b7 ZJS |
50 | static inline const char* item_type_to_string(ItemType t) { |
51 | switch (t) { | |
52 | case ADD_USER: | |
53 | return "user"; | |
54 | case ADD_GROUP: | |
55 | return "group"; | |
56 | case ADD_MEMBER: | |
57 | return "member"; | |
58 | case ADD_RANGE: | |
59 | return "range"; | |
60 | default: | |
61 | assert_not_reached(); | |
62 | } | |
63 | } | |
64 | ||
1b992147 LP |
65 | typedef struct Item { |
66 | ItemType type; | |
67 | ||
68 | char *name; | |
649916d3 | 69 | char *group_name; |
1b992147 LP |
70 | char *uid_path; |
71 | char *gid_path; | |
72 | char *description; | |
7629889c | 73 | char *home; |
7b1aaf66 | 74 | char *shell; |
1b992147 LP |
75 | |
76 | gid_t gid; | |
77 | uid_t uid; | |
78 | ||
79 | bool gid_set:1; | |
fb959f14 | 80 | |
3f316701 ZJS |
81 | /* When set the group with the specified GID must exist |
82 | * and the check if a UID clashes with the GID is skipped. | |
fb959f14 | 83 | */ |
b9ee05c2 | 84 | bool id_set_strict:1; |
fb959f14 | 85 | |
1b992147 LP |
86 | bool uid_set:1; |
87 | ||
c1b6b04f KS |
88 | bool todo_user:1; |
89 | bool todo_group:1; | |
1b992147 LP |
90 | } Item; |
91 | ||
92 | static char *arg_root = NULL; | |
0c3ee127 | 93 | static char *arg_image = NULL; |
ec0327d6 | 94 | static bool arg_cat_config = false; |
d16a1c1b | 95 | static const char *arg_replace = NULL; |
64fe1095 | 96 | static bool arg_dry_run = false; |
1b600bd5 | 97 | static bool arg_inline = false; |
0221d68a | 98 | static PagerFlags arg_pager_flags = 0; |
1b992147 | 99 | |
5bc9c980 MV |
100 | static OrderedHashmap *users = NULL, *groups = NULL; |
101 | static OrderedHashmap *todo_uids = NULL, *todo_gids = NULL; | |
102 | static OrderedHashmap *members = NULL; | |
1b992147 | 103 | |
71da1673 YW |
104 | static Hashmap *database_by_uid = NULL, *database_by_username = NULL; |
105 | static Hashmap *database_by_gid = NULL, *database_by_groupname = NULL; | |
106 | static Set *database_users = NULL, *database_groups = NULL; | |
1b992147 | 107 | |
fed1e721 | 108 | static uid_t search_uid = UID_INVALID; |
8530dc44 | 109 | static UidRange *uid_range = NULL; |
1b992147 | 110 | |
4b6f9b20 ZJS |
111 | static UGIDAllocationRange login_defs = {}; |
112 | static bool login_defs_need_warning = false; | |
113 | ||
71da1673 YW |
114 | STATIC_DESTRUCTOR_REGISTER(groups, ordered_hashmap_freep); |
115 | STATIC_DESTRUCTOR_REGISTER(users, ordered_hashmap_freep); | |
116 | STATIC_DESTRUCTOR_REGISTER(members, ordered_hashmap_freep); | |
117 | STATIC_DESTRUCTOR_REGISTER(todo_uids, ordered_hashmap_freep); | |
118 | STATIC_DESTRUCTOR_REGISTER(todo_gids, ordered_hashmap_freep); | |
119 | STATIC_DESTRUCTOR_REGISTER(database_by_uid, hashmap_freep); | |
120 | STATIC_DESTRUCTOR_REGISTER(database_by_username, hashmap_freep); | |
121 | STATIC_DESTRUCTOR_REGISTER(database_users, set_free_freep); | |
122 | STATIC_DESTRUCTOR_REGISTER(database_by_gid, hashmap_freep); | |
123 | STATIC_DESTRUCTOR_REGISTER(database_by_groupname, hashmap_freep); | |
124 | STATIC_DESTRUCTOR_REGISTER(database_groups, set_free_freep); | |
8dcc66ce | 125 | STATIC_DESTRUCTOR_REGISTER(uid_range, uid_range_freep); |
71da1673 | 126 | STATIC_DESTRUCTOR_REGISTER(arg_root, freep); |
0c3ee127 | 127 | STATIC_DESTRUCTOR_REGISTER(arg_image, freep); |
71da1673 | 128 | |
08c7c321 ZJS |
129 | static int errno_is_not_exists(int code) { |
130 | /* See getpwnam(3) and getgrnam(3): those codes and others can be returned if the user or group are | |
131 | * not found. */ | |
132 | return IN_SET(code, 0, ENOENT, ESRCH, EBADF, EPERM); | |
133 | } | |
134 | ||
4b6f9b20 ZJS |
135 | static void maybe_emit_login_defs_warning(void) { |
136 | if (!login_defs_need_warning) | |
137 | return; | |
138 | ||
139 | if (login_defs.system_alloc_uid_min != SYSTEM_ALLOC_UID_MIN || | |
140 | login_defs.system_uid_max != SYSTEM_UID_MAX) | |
141 | log_warning("login.defs specifies UID allocation range "UID_FMT"–"UID_FMT | |
142 | " that is different than the built-in defaults ("UID_FMT"–"UID_FMT")", | |
143 | login_defs.system_alloc_uid_min, login_defs.system_uid_max, | |
2676befc | 144 | (uid_t) SYSTEM_ALLOC_UID_MIN, (uid_t) SYSTEM_UID_MAX); |
4b6f9b20 ZJS |
145 | if (login_defs.system_alloc_gid_min != SYSTEM_ALLOC_GID_MIN || |
146 | login_defs.system_gid_max != SYSTEM_GID_MAX) | |
147 | log_warning("login.defs specifies GID allocation range "GID_FMT"–"GID_FMT | |
148 | " that is different than the built-in defaults ("GID_FMT"–"GID_FMT")", | |
149 | login_defs.system_alloc_gid_min, login_defs.system_gid_max, | |
2676befc | 150 | (gid_t) SYSTEM_ALLOC_GID_MIN, (gid_t) SYSTEM_GID_MAX); |
4b6f9b20 ZJS |
151 | |
152 | login_defs_need_warning = false; | |
153 | } | |
154 | ||
1b992147 LP |
155 | static int load_user_database(void) { |
156 | _cleanup_fclose_ FILE *f = NULL; | |
157 | const char *passwd_path; | |
158 | struct passwd *pw; | |
159 | int r; | |
160 | ||
1d13f648 | 161 | passwd_path = prefix_roota(arg_root, "/etc/passwd"); |
1b992147 LP |
162 | f = fopen(passwd_path, "re"); |
163 | if (!f) | |
164 | return errno == ENOENT ? 0 : -errno; | |
165 | ||
71da1673 | 166 | r = hashmap_ensure_allocated(&database_by_username, &string_hash_ops); |
1b992147 LP |
167 | if (r < 0) |
168 | return r; | |
169 | ||
71da1673 | 170 | r = hashmap_ensure_allocated(&database_by_uid, NULL); |
1b992147 LP |
171 | if (r < 0) |
172 | return r; | |
173 | ||
71da1673 | 174 | r = set_ensure_allocated(&database_users, NULL); |
1b992147 LP |
175 | if (r < 0) |
176 | return r; | |
177 | ||
100d5f6e | 178 | while ((r = fgetpwent_sane(f, &pw)) > 0) { |
43e948ee | 179 | char *n; |
340ac019 | 180 | int k, q; |
1b992147 LP |
181 | |
182 | n = strdup(pw->pw_name); | |
183 | if (!n) | |
184 | return -ENOMEM; | |
185 | ||
71da1673 YW |
186 | k = set_put(database_users, n); |
187 | if (k < 0) { | |
1b992147 LP |
188 | free(n); |
189 | return k; | |
190 | } | |
191 | ||
71da1673 YW |
192 | k = hashmap_put(database_by_username, n, UID_TO_PTR(pw->pw_uid)); |
193 | if (k < 0 && k != -EEXIST) | |
194 | return k; | |
1b992147 | 195 | |
71da1673 YW |
196 | q = hashmap_put(database_by_uid, UID_TO_PTR(pw->pw_uid), n); |
197 | if (q < 0 && q != -EEXIST) | |
198 | return q; | |
1b992147 | 199 | } |
100d5f6e | 200 | return r; |
1b992147 LP |
201 | } |
202 | ||
203 | static int load_group_database(void) { | |
204 | _cleanup_fclose_ FILE *f = NULL; | |
205 | const char *group_path; | |
206 | struct group *gr; | |
207 | int r; | |
208 | ||
1d13f648 | 209 | group_path = prefix_roota(arg_root, "/etc/group"); |
1b992147 LP |
210 | f = fopen(group_path, "re"); |
211 | if (!f) | |
212 | return errno == ENOENT ? 0 : -errno; | |
213 | ||
71da1673 | 214 | r = hashmap_ensure_allocated(&database_by_groupname, &string_hash_ops); |
1b992147 LP |
215 | if (r < 0) |
216 | return r; | |
217 | ||
71da1673 | 218 | r = hashmap_ensure_allocated(&database_by_gid, NULL); |
1b992147 LP |
219 | if (r < 0) |
220 | return r; | |
221 | ||
71da1673 | 222 | r = set_ensure_allocated(&database_groups, NULL); |
1b992147 LP |
223 | if (r < 0) |
224 | return r; | |
225 | ||
f030d36c | 226 | while ((r = fgetgrent_sane(f, &gr)) > 0) { |
1b992147 LP |
227 | char *n; |
228 | int k, q; | |
229 | ||
230 | n = strdup(gr->gr_name); | |
231 | if (!n) | |
232 | return -ENOMEM; | |
233 | ||
71da1673 YW |
234 | k = set_put(database_groups, n); |
235 | if (k < 0) { | |
1b992147 LP |
236 | free(n); |
237 | return k; | |
238 | } | |
239 | ||
71da1673 YW |
240 | k = hashmap_put(database_by_groupname, n, GID_TO_PTR(gr->gr_gid)); |
241 | if (k < 0 && k != -EEXIST) | |
242 | return k; | |
1b992147 | 243 | |
71da1673 YW |
244 | q = hashmap_put(database_by_gid, GID_TO_PTR(gr->gr_gid), n); |
245 | if (q < 0 && q != -EEXIST) | |
246 | return q; | |
1b992147 | 247 | } |
f030d36c | 248 | return r; |
1b992147 LP |
249 | } |
250 | ||
9f1c1940 | 251 | static int make_backup(const char *target, const char *x) { |
62c03398 | 252 | _cleanup_(unlink_and_freep) char *dst_tmp = NULL; |
9f1c1940 | 253 | _cleanup_fclose_ FILE *dst = NULL; |
5bb1d7fb | 254 | _cleanup_close_ int src = -EBADF; |
62c03398 | 255 | const char *backup; |
1b992147 LP |
256 | struct stat st; |
257 | int r; | |
258 | ||
62c03398 LP |
259 | assert(target); |
260 | assert(x); | |
261 | ||
1b992147 LP |
262 | src = open(x, O_RDONLY|O_CLOEXEC|O_NOCTTY); |
263 | if (src < 0) { | |
264 | if (errno == ENOENT) /* No backup necessary... */ | |
265 | return 0; | |
266 | ||
267 | return -errno; | |
268 | } | |
269 | ||
270 | if (fstat(src, &st) < 0) | |
271 | return -errno; | |
272 | ||
62c03398 | 273 | r = fopen_temporary_label( |
47fb161e | 274 | target, /* The path for which to the look up the label */ |
62c03398 | 275 | x, /* Where we want the file actually to end up */ |
47fb161e ZJS |
276 | &dst, /* The temporary file we write to */ |
277 | &dst_tmp); | |
9f1c1940 ZJS |
278 | if (r < 0) |
279 | return r; | |
1b992147 | 280 | |
f5fbe71d | 281 | r = copy_bytes(src, fileno(dst), UINT64_MAX, COPY_REFLINK); |
1b992147 | 282 | if (r < 0) |
62c03398 | 283 | return r; |
9f1c1940 | 284 | |
63c372cb | 285 | backup = strjoina(x, "-"); |
9f1c1940 | 286 | |
62c03398 LP |
287 | /* Copy over the access mask. Don't fail on chmod() or chown(). If it stays owned by us and/or |
288 | * unreadable by others, then it isn't too bad... */ | |
b78d7f24 | 289 | r = fchmod_and_chown_with_fallback(fileno(dst), dst_tmp, st.st_mode & 07777, st.st_uid, st.st_gid); |
c039af23 YW |
290 | if (r < 0) |
291 | log_warning_errno(r, "Failed to change access mode or ownership of %s: %m", backup); | |
1b992147 | 292 | |
62c03398 | 293 | if (futimens(fileno(dst), (const struct timespec[2]) { st.st_atim, st.st_mtim }) < 0) |
56f64d95 | 294 | log_warning_errno(errno, "Failed to fix access and modification time of %s: %m", backup); |
1b992147 | 295 | |
62c03398 | 296 | r = fsync_full(fileno(dst)); |
0675e94a | 297 | if (r < 0) |
62c03398 | 298 | return r; |
0675e94a | 299 | |
62c03398 LP |
300 | if (rename(dst_tmp, backup) < 0) |
301 | return errno; | |
1b992147 | 302 | |
7802194a | 303 | dst_tmp = mfree(dst_tmp); /* disable the unlink_and_freep() hook now that the file has been renamed */ |
1b992147 | 304 | return 0; |
1b992147 LP |
305 | } |
306 | ||
a12b0cc3 LP |
307 | static int putgrent_with_members(const struct group *gr, FILE *group) { |
308 | char **a; | |
309 | ||
310 | assert(gr); | |
311 | assert(group); | |
312 | ||
5bc9c980 | 313 | a = ordered_hashmap_get(members, gr->gr_name); |
a12b0cc3 LP |
314 | if (a) { |
315 | _cleanup_strv_free_ char **l = NULL; | |
316 | bool added = false; | |
a12b0cc3 LP |
317 | |
318 | l = strv_copy(gr->gr_mem); | |
319 | if (!l) | |
320 | return -ENOMEM; | |
321 | ||
322 | STRV_FOREACH(i, a) { | |
d29cc4d6 | 323 | if (strv_contains(l, *i)) |
a12b0cc3 LP |
324 | continue; |
325 | ||
326 | if (strv_extend(&l, *i) < 0) | |
327 | return -ENOMEM; | |
328 | ||
329 | added = true; | |
330 | } | |
331 | ||
332 | if (added) { | |
333 | struct group t; | |
100d5f6e | 334 | int r; |
a12b0cc3 LP |
335 | |
336 | strv_uniq(l); | |
337 | strv_sort(l); | |
338 | ||
339 | t = *gr; | |
340 | t.gr_mem = l; | |
341 | ||
100d5f6e FB |
342 | r = putgrent_sane(&t, group); |
343 | return r < 0 ? r : 1; | |
a12b0cc3 LP |
344 | } |
345 | } | |
346 | ||
100d5f6e | 347 | return putgrent_sane(gr, group); |
a12b0cc3 LP |
348 | } |
349 | ||
349cc4a5 | 350 | #if ENABLE_GSHADOW |
9ab315cc LP |
351 | static int putsgent_with_members(const struct sgrp *sg, FILE *gshadow) { |
352 | char **a; | |
353 | ||
354 | assert(sg); | |
355 | assert(gshadow); | |
356 | ||
5bc9c980 | 357 | a = ordered_hashmap_get(members, sg->sg_namp); |
9ab315cc LP |
358 | if (a) { |
359 | _cleanup_strv_free_ char **l = NULL; | |
360 | bool added = false; | |
9ab315cc LP |
361 | |
362 | l = strv_copy(sg->sg_mem); | |
363 | if (!l) | |
364 | return -ENOMEM; | |
365 | ||
366 | STRV_FOREACH(i, a) { | |
d29cc4d6 | 367 | if (strv_contains(l, *i)) |
9ab315cc LP |
368 | continue; |
369 | ||
370 | if (strv_extend(&l, *i) < 0) | |
371 | return -ENOMEM; | |
372 | ||
373 | added = true; | |
374 | } | |
375 | ||
376 | if (added) { | |
377 | struct sgrp t; | |
100d5f6e | 378 | int r; |
9ab315cc LP |
379 | |
380 | strv_uniq(l); | |
381 | strv_sort(l); | |
382 | ||
383 | t = *sg; | |
384 | t.sg_mem = l; | |
385 | ||
100d5f6e FB |
386 | r = putsgent_sane(&t, gshadow); |
387 | return r < 0 ? r : 1; | |
9ab315cc LP |
388 | } |
389 | } | |
390 | ||
100d5f6e | 391 | return putsgent_sane(sg, gshadow); |
9ab315cc | 392 | } |
b14e1b43 | 393 | #endif |
9ab315cc | 394 | |
5f465fda ZJS |
395 | static const char* pick_shell(const Item *i) { |
396 | if (i->type != ADD_USER) | |
397 | return NULL; | |
398 | if (i->shell) | |
399 | return i->shell; | |
400 | if (i->uid_set && i->uid == 0) | |
8a7adccb | 401 | return default_root_shell(arg_root); |
5f465fda | 402 | return NOLOGIN; |
7b1aaf66 ZJS |
403 | } |
404 | ||
b20b0b66 FB |
405 | static int write_temporary_passwd(const char *passwd_path, FILE **tmpfile, char **tmpfile_path) { |
406 | _cleanup_fclose_ FILE *original = NULL, *passwd = NULL; | |
1dd98a71 | 407 | _cleanup_(unlink_and_freep) char *passwd_tmp = NULL; |
563dc6f8 | 408 | struct passwd *pw = NULL; |
1b992147 LP |
409 | Item *i; |
410 | int r; | |
411 | ||
98167876 | 412 | if (ordered_hashmap_isempty(todo_uids)) |
b20b0b66 | 413 | return 0; |
1b992147 | 414 | |
64fe1095 | 415 | if (arg_dry_run) { |
28e5e1e9 | 416 | log_info("Would write /etc/passwd%s", special_glyph(SPECIAL_GLYPH_ELLIPSIS)); |
64fe1095 ZJS |
417 | return 0; |
418 | } | |
419 | ||
b20b0b66 FB |
420 | r = fopen_temporary_label("/etc/passwd", passwd_path, &passwd, &passwd_tmp); |
421 | if (r < 0) | |
335f6ab4 | 422 | return log_debug_errno(r, "Failed to open temporary copy of %s: %m", passwd_path); |
b20b0b66 FB |
423 | |
424 | original = fopen(passwd_path, "re"); | |
425 | if (original) { | |
b20b0b66 | 426 | |
82855aa6 ZJS |
427 | /* Allow fallback path for when /proc is not mounted. On any normal system /proc will be |
428 | * mounted, but e.g. when 'dnf --installroot' is used, it might not be. There is no security | |
429 | * relevance here, since the environment is ultimately trusted, and not requiring /proc makes | |
430 | * it easier to depend on sysusers in packaging scripts and suchlike. */ | |
431 | r = copy_rights_with_fallback(fileno(original), fileno(passwd), passwd_tmp); | |
1b992147 | 432 | if (r < 0) |
335f6ab4 ZJS |
433 | return log_debug_errno(r, "Failed to copy permissions from %s to %s: %m", |
434 | passwd_path, passwd_tmp); | |
1b992147 | 435 | |
100d5f6e | 436 | while ((r = fgetpwent_sane(original, &pw)) > 0) { |
5bc9c980 | 437 | i = ordered_hashmap_get(users, pw->pw_name); |
330d1def ZJS |
438 | if (i && i->todo_user) |
439 | return log_error_errno(SYNTHETIC_ERRNO(EEXIST), | |
440 | "%s: User \"%s\" already exists.", | |
441 | passwd_path, pw->pw_name); | |
e3c72c21 | 442 | |
330d1def ZJS |
443 | if (ordered_hashmap_contains(todo_uids, UID_TO_PTR(pw->pw_uid))) |
444 | return log_error_errno(SYNTHETIC_ERRNO(EEXIST), | |
445 | "%s: Detected collision for UID " UID_FMT ".", | |
446 | passwd_path, pw->pw_uid); | |
b20b0b66 | 447 | |
563dc6f8 FB |
448 | /* Make sure we keep the NIS entries (if any) at the end. */ |
449 | if (IN_SET(pw->pw_name[0], '+', '-')) | |
450 | break; | |
451 | ||
100d5f6e FB |
452 | r = putpwent_sane(pw, passwd); |
453 | if (r < 0) | |
335f6ab4 ZJS |
454 | return log_debug_errno(r, "Failed to add existing user \"%s\" to temporary passwd file: %m", |
455 | pw->pw_name); | |
b20b0b66 | 456 | } |
100d5f6e | 457 | if (r < 0) |
335f6ab4 | 458 | return log_debug_errno(r, "Failed to read %s: %m", passwd_path); |
1dd98a71 FB |
459 | |
460 | } else { | |
461 | if (errno != ENOENT) | |
335f6ab4 | 462 | return log_debug_errno(errno, "Failed to open %s: %m", passwd_path); |
1dd98a71 | 463 | if (fchmod(fileno(passwd), 0644) < 0) |
335f6ab4 | 464 | return log_debug_errno(errno, "Failed to fchmod %s: %m", passwd_tmp); |
b20b0b66 FB |
465 | } |
466 | ||
90e74a66 | 467 | ORDERED_HASHMAP_FOREACH(i, todo_uids) { |
99e9f896 LP |
468 | _cleanup_free_ char *creds_shell = NULL, *cn = NULL; |
469 | ||
b20b0b66 FB |
470 | struct passwd n = { |
471 | .pw_name = i->name, | |
472 | .pw_uid = i->uid, | |
473 | .pw_gid = i->gid, | |
d610e142 | 474 | .pw_gecos = (char*) strempty(i->description), |
1b992147 | 475 | |
b20b0b66 | 476 | /* "x" means the password is stored in the shadow file */ |
53c25ac9 | 477 | .pw_passwd = (char*) PASSWORD_SEE_SHADOW, |
a12b0cc3 | 478 | |
b20b0b66 | 479 | /* We default to the root directory as home */ |
636e72bc | 480 | .pw_dir = i->home ?: (char*) "/", |
1b992147 | 481 | |
b20b0b66 FB |
482 | /* Initialize the shell to nologin, with one exception: |
483 | * for root we patch in something special */ | |
5f465fda | 484 | .pw_shell = (char*) pick_shell(i), |
b20b0b66 | 485 | }; |
9ab315cc | 486 | |
99e9f896 LP |
487 | /* Try to pick up the shell for this account via the credentials logic */ |
488 | cn = strjoin("passwd.shell.", i->name); | |
489 | if (!cn) | |
490 | return -ENOMEM; | |
491 | ||
492 | r = read_credential(cn, (void**) &creds_shell, NULL); | |
493 | if (r < 0) | |
494 | log_debug_errno(r, "Couldn't read credential '%s', ignoring: %m", cn); | |
495 | else | |
496 | n.pw_shell = creds_shell; | |
497 | ||
100d5f6e FB |
498 | r = putpwent_sane(&n, passwd); |
499 | if (r < 0) | |
335f6ab4 ZJS |
500 | return log_debug_errno(r, "Failed to add new user \"%s\" to temporary passwd file: %m", |
501 | pw->pw_name); | |
b20b0b66 FB |
502 | } |
503 | ||
563dc6f8 FB |
504 | /* Append the remaining NIS entries if any */ |
505 | while (pw) { | |
100d5f6e FB |
506 | r = putpwent_sane(pw, passwd); |
507 | if (r < 0) | |
335f6ab4 ZJS |
508 | return log_debug_errno(r, "Failed to add existing user \"%s\" to temporary passwd file: %m", |
509 | pw->pw_name); | |
563dc6f8 | 510 | |
100d5f6e FB |
511 | r = fgetpwent_sane(original, &pw); |
512 | if (r < 0) | |
335f6ab4 | 513 | return log_debug_errno(r, "Failed to read %s: %m", passwd_path); |
100d5f6e FB |
514 | if (r == 0) |
515 | break; | |
563dc6f8 | 516 | } |
563dc6f8 | 517 | |
19193b48 | 518 | r = fflush_sync_and_check(passwd); |
b20b0b66 | 519 | if (r < 0) |
335f6ab4 | 520 | return log_debug_errno(r, "Failed to flush %s: %m", passwd_tmp); |
b20b0b66 | 521 | |
1cc6c93a YW |
522 | *tmpfile = TAKE_PTR(passwd); |
523 | *tmpfile_path = TAKE_PTR(passwd_tmp); | |
524 | ||
b20b0b66 | 525 | return 0; |
b20b0b66 FB |
526 | } |
527 | ||
3fa8a114 JSMR |
528 | static usec_t epoch_or_now(void) { |
529 | uint64_t epoch; | |
530 | ||
531 | if (getenv_uint64_secure("SOURCE_DATE_EPOCH", &epoch) >= 0) { | |
532 | if (epoch > UINT64_MAX/USEC_PER_SEC) /* Overflow check */ | |
533 | return USEC_INFINITY; | |
534 | return (usec_t) epoch * USEC_PER_SEC; | |
535 | } | |
536 | ||
537 | return now(CLOCK_REALTIME); | |
538 | } | |
539 | ||
b20b0b66 FB |
540 | static int write_temporary_shadow(const char *shadow_path, FILE **tmpfile, char **tmpfile_path) { |
541 | _cleanup_fclose_ FILE *original = NULL, *shadow = NULL; | |
1dd98a71 | 542 | _cleanup_(unlink_and_freep) char *shadow_tmp = NULL; |
19ec7de2 | 543 | struct spwd *sp = NULL; |
b20b0b66 FB |
544 | long lstchg; |
545 | Item *i; | |
546 | int r; | |
547 | ||
98167876 | 548 | if (ordered_hashmap_isempty(todo_uids)) |
b20b0b66 FB |
549 | return 0; |
550 | ||
64fe1095 | 551 | if (arg_dry_run) { |
28e5e1e9 | 552 | log_info("Would write /etc/shadow%s", special_glyph(SPECIAL_GLYPH_ELLIPSIS)); |
64fe1095 ZJS |
553 | return 0; |
554 | } | |
555 | ||
b20b0b66 FB |
556 | r = fopen_temporary_label("/etc/shadow", shadow_path, &shadow, &shadow_tmp); |
557 | if (r < 0) | |
335f6ab4 | 558 | return log_debug_errno(r, "Failed to open temporary copy of %s: %m", shadow_path); |
9ab315cc | 559 | |
3fa8a114 | 560 | lstchg = (long) (epoch_or_now() / USEC_PER_DAY); |
b20b0b66 FB |
561 | |
562 | original = fopen(shadow_path, "re"); | |
563 | if (original) { | |
b20b0b66 | 564 | |
82855aa6 | 565 | r = copy_rights_with_fallback(fileno(original), fileno(shadow), shadow_tmp); |
9ab315cc | 566 | if (r < 0) |
335f6ab4 ZJS |
567 | return log_debug_errno(r, "Failed to copy permissions from %s to %s: %m", |
568 | shadow_path, shadow_tmp); | |
9ab315cc | 569 | |
100d5f6e | 570 | while ((r = fgetspent_sane(original, &sp)) > 0) { |
5bc9c980 | 571 | i = ordered_hashmap_get(users, sp->sp_namp); |
b20b0b66 FB |
572 | if (i && i->todo_user) { |
573 | /* we will update the existing entry */ | |
574 | sp->sp_lstchg = lstchg; | |
e3c72c21 | 575 | |
b20b0b66 FB |
576 | /* only the /etc/shadow stage is left, so we can |
577 | * safely remove the item from the todo set */ | |
578 | i->todo_user = false; | |
5bc9c980 | 579 | ordered_hashmap_remove(todo_uids, UID_TO_PTR(i->uid)); |
9ab315cc | 580 | } |
b20b0b66 | 581 | |
19ec7de2 FB |
582 | /* Make sure we keep the NIS entries (if any) at the end. */ |
583 | if (IN_SET(sp->sp_namp[0], '+', '-')) | |
584 | break; | |
585 | ||
100d5f6e FB |
586 | r = putspent_sane(sp, shadow); |
587 | if (r < 0) | |
335f6ab4 ZJS |
588 | return log_debug_errno(r, "Failed to add existing user \"%s\" to temporary shadow file: %m", |
589 | sp->sp_namp); | |
590 | ||
b20b0b66 | 591 | } |
100d5f6e | 592 | if (r < 0) |
335f6ab4 | 593 | return log_debug_errno(r, "Failed to read %s: %m", shadow_path); |
1dd98a71 FB |
594 | |
595 | } else { | |
596 | if (errno != ENOENT) | |
335f6ab4 | 597 | return log_debug_errno(errno, "Failed to open %s: %m", shadow_path); |
1dd98a71 | 598 | if (fchmod(fileno(shadow), 0000) < 0) |
335f6ab4 | 599 | return log_debug_errno(errno, "Failed to fchmod %s: %m", shadow_tmp); |
b20b0b66 | 600 | } |
9ab315cc | 601 | |
90e74a66 | 602 | ORDERED_HASHMAP_FOREACH(i, todo_uids) { |
99e9f896 | 603 | _cleanup_(erase_and_freep) char *creds_password = NULL; |
ff86850b | 604 | bool is_hashed; |
99e9f896 | 605 | |
b20b0b66 FB |
606 | struct spwd n = { |
607 | .sp_namp = i->name, | |
53c25ac9 | 608 | .sp_pwdp = (char*) PASSWORD_LOCKED_AND_INVALID, |
b20b0b66 FB |
609 | .sp_lstchg = lstchg, |
610 | .sp_min = -1, | |
611 | .sp_max = -1, | |
612 | .sp_warn = -1, | |
613 | .sp_inact = -1, | |
12c82937 | 614 | .sp_expire = -1, |
f5fbe71d | 615 | .sp_flag = ULONG_MAX, /* this appears to be what everybody does ... */ |
b20b0b66 | 616 | }; |
9ab315cc | 617 | |
ff86850b LN |
618 | r = get_credential_user_password(i->name, &creds_password, &is_hashed); |
619 | if (r < 0) | |
620 | log_debug_errno(r, "Couldn't read password credential for user '%s', ignoring: %m", i->name); | |
99e9f896 | 621 | |
ff86850b LN |
622 | if (creds_password && !is_hashed) { |
623 | _cleanup_(erase_and_freep) char* plaintext_password = TAKE_PTR(creds_password); | |
624 | r = hash_password(plaintext_password, &creds_password); | |
99e9f896 | 625 | if (r < 0) |
ff86850b LN |
626 | return log_debug_errno(r, "Failed to hash password: %m"); |
627 | } | |
99e9f896 LP |
628 | |
629 | if (creds_password) | |
630 | n.sp_pwdp = creds_password; | |
631 | ||
100d5f6e FB |
632 | r = putspent_sane(&n, shadow); |
633 | if (r < 0) | |
335f6ab4 ZJS |
634 | return log_debug_errno(r, "Failed to add new user \"%s\" to temporary shadow file: %m", |
635 | sp->sp_namp); | |
1b992147 | 636 | } |
19ec7de2 FB |
637 | |
638 | /* Append the remaining NIS entries if any */ | |
639 | while (sp) { | |
100d5f6e FB |
640 | r = putspent_sane(sp, shadow); |
641 | if (r < 0) | |
335f6ab4 ZJS |
642 | return log_debug_errno(r, "Failed to add existing user \"%s\" to temporary shadow file: %m", |
643 | sp->sp_namp); | |
19ec7de2 | 644 | |
100d5f6e FB |
645 | r = fgetspent_sane(original, &sp); |
646 | if (r < 0) | |
335f6ab4 | 647 | return log_debug_errno(r, "Failed to read %s: %m", shadow_path); |
100d5f6e FB |
648 | if (r == 0) |
649 | break; | |
19ec7de2 FB |
650 | } |
651 | if (!IN_SET(errno, 0, ENOENT)) | |
652 | return -errno; | |
1b992147 | 653 | |
0675e94a | 654 | r = fflush_sync_and_check(shadow); |
b20b0b66 | 655 | if (r < 0) |
335f6ab4 | 656 | return log_debug_errno(r, "Failed to flush %s: %m", shadow_tmp); |
b20b0b66 | 657 | |
1cc6c93a YW |
658 | *tmpfile = TAKE_PTR(shadow); |
659 | *tmpfile_path = TAKE_PTR(shadow_tmp); | |
660 | ||
b20b0b66 | 661 | return 0; |
b20b0b66 | 662 | } |
1b992147 | 663 | |
b20b0b66 FB |
664 | static int write_temporary_group(const char *group_path, FILE **tmpfile, char **tmpfile_path) { |
665 | _cleanup_fclose_ FILE *original = NULL, *group = NULL; | |
1dd98a71 | 666 | _cleanup_(unlink_and_freep) char *group_tmp = NULL; |
b20b0b66 | 667 | bool group_changed = false; |
563dc6f8 | 668 | struct group *gr = NULL; |
b20b0b66 FB |
669 | Item *i; |
670 | int r; | |
1b992147 | 671 | |
98167876 | 672 | if (ordered_hashmap_isempty(todo_gids) && ordered_hashmap_isempty(members)) |
b20b0b66 | 673 | return 0; |
e3c72c21 | 674 | |
64fe1095 | 675 | if (arg_dry_run) { |
28e5e1e9 | 676 | log_info("Would write /etc/group%s", special_glyph(SPECIAL_GLYPH_ELLIPSIS)); |
64fe1095 ZJS |
677 | return 0; |
678 | } | |
679 | ||
b20b0b66 FB |
680 | r = fopen_temporary_label("/etc/group", group_path, &group, &group_tmp); |
681 | if (r < 0) | |
4c795066 | 682 | return log_error_errno(r, "Failed to open temporary copy of %s: %m", group_path); |
b20b0b66 FB |
683 | |
684 | original = fopen(group_path, "re"); | |
685 | if (original) { | |
b20b0b66 | 686 | |
82855aa6 | 687 | r = copy_rights_with_fallback(fileno(original), fileno(group), group_tmp); |
b20b0b66 | 688 | if (r < 0) |
4c795066 | 689 | return log_error_errno(r, "Failed to copy permissions from %s to %s: %m", |
335f6ab4 | 690 | group_path, group_tmp); |
b20b0b66 | 691 | |
100d5f6e | 692 | while ((r = fgetgrent_sane(original, &gr)) > 0) { |
b20b0b66 FB |
693 | /* Safety checks against name and GID collisions. Normally, |
694 | * this should be unnecessary, but given that we look at the | |
695 | * entries anyway here, let's make an extra verification | |
696 | * step that we don't generate duplicate entries. */ | |
697 | ||
5bc9c980 | 698 | i = ordered_hashmap_get(groups, gr->gr_name); |
330d1def ZJS |
699 | if (i && i->todo_group) |
700 | return log_error_errno(SYNTHETIC_ERRNO(EEXIST), | |
701 | "%s: Group \"%s\" already exists.", | |
702 | group_path, gr->gr_name); | |
b20b0b66 | 703 | |
330d1def ZJS |
704 | if (ordered_hashmap_contains(todo_gids, GID_TO_PTR(gr->gr_gid))) |
705 | return log_error_errno(SYNTHETIC_ERRNO(EEXIST), | |
706 | "%s: Detected collision for GID " GID_FMT ".", | |
707 | group_path, gr->gr_gid); | |
1b992147 | 708 | |
563dc6f8 FB |
709 | /* Make sure we keep the NIS entries (if any) at the end. */ |
710 | if (IN_SET(gr->gr_name[0], '+', '-')) | |
711 | break; | |
712 | ||
b20b0b66 FB |
713 | r = putgrent_with_members(gr, group); |
714 | if (r < 0) | |
4c795066 | 715 | return log_error_errno(r, "Failed to add existing group \"%s\" to temporary group file: %m", |
335f6ab4 | 716 | gr->gr_name); |
b20b0b66 FB |
717 | if (r > 0) |
718 | group_changed = true; | |
b20b0b66 | 719 | } |
100d5f6e | 720 | if (r < 0) |
4c795066 | 721 | return log_error_errno(r, "Failed to read %s: %m", group_path); |
1dd98a71 FB |
722 | |
723 | } else { | |
724 | if (errno != ENOENT) | |
4c795066 | 725 | return log_error_errno(errno, "Failed to open %s: %m", group_path); |
1dd98a71 | 726 | if (fchmod(fileno(group), 0644) < 0) |
4c795066 | 727 | return log_error_errno(errno, "Failed to fchmod %s: %m", group_tmp); |
b20b0b66 | 728 | } |
7629889c | 729 | |
90e74a66 | 730 | ORDERED_HASHMAP_FOREACH(i, todo_gids) { |
b20b0b66 FB |
731 | struct group n = { |
732 | .gr_name = i->name, | |
733 | .gr_gid = i->gid, | |
53c25ac9 | 734 | .gr_passwd = (char*) PASSWORD_SEE_SHADOW, |
b20b0b66 | 735 | }; |
1b992147 | 736 | |
b20b0b66 FB |
737 | r = putgrent_with_members(&n, group); |
738 | if (r < 0) | |
4c795066 | 739 | return log_error_errno(r, "Failed to add new group \"%s\" to temporary group file: %m", |
335f6ab4 | 740 | gr->gr_name); |
7629889c | 741 | |
b20b0b66 FB |
742 | group_changed = true; |
743 | } | |
1b992147 | 744 | |
563dc6f8 FB |
745 | /* Append the remaining NIS entries if any */ |
746 | while (gr) { | |
100d5f6e FB |
747 | r = putgrent_sane(gr, group); |
748 | if (r < 0) | |
4c795066 | 749 | return log_error_errno(r, "Failed to add existing group \"%s\" to temporary group file: %m", |
335f6ab4 | 750 | gr->gr_name); |
563dc6f8 | 751 | |
100d5f6e FB |
752 | r = fgetgrent_sane(original, &gr); |
753 | if (r < 0) | |
4c795066 | 754 | return log_error_errno(r, "Failed to read %s: %m", group_path); |
100d5f6e FB |
755 | if (r == 0) |
756 | break; | |
563dc6f8 | 757 | } |
563dc6f8 | 758 | |
0675e94a | 759 | r = fflush_sync_and_check(group); |
b20b0b66 | 760 | if (r < 0) |
4c795066 | 761 | return log_error_errno(r, "Failed to flush %s: %m", group_tmp); |
1b992147 | 762 | |
b20b0b66 | 763 | if (group_changed) { |
1cc6c93a YW |
764 | *tmpfile = TAKE_PTR(group); |
765 | *tmpfile_path = TAKE_PTR(group_tmp); | |
b20b0b66 FB |
766 | } |
767 | return 0; | |
b20b0b66 FB |
768 | } |
769 | ||
770 | static int write_temporary_gshadow(const char * gshadow_path, FILE **tmpfile, char **tmpfile_path) { | |
349cc4a5 | 771 | #if ENABLE_GSHADOW |
b20b0b66 | 772 | _cleanup_fclose_ FILE *original = NULL, *gshadow = NULL; |
1dd98a71 | 773 | _cleanup_(unlink_and_freep) char *gshadow_tmp = NULL; |
b20b0b66 | 774 | bool group_changed = false; |
b20b0b66 FB |
775 | Item *i; |
776 | int r; | |
777 | ||
98167876 | 778 | if (ordered_hashmap_isempty(todo_gids) && ordered_hashmap_isempty(members)) |
b20b0b66 FB |
779 | return 0; |
780 | ||
64fe1095 | 781 | if (arg_dry_run) { |
28e5e1e9 | 782 | log_info("Would write /etc/gshadow%s", special_glyph(SPECIAL_GLYPH_ELLIPSIS)); |
64fe1095 ZJS |
783 | return 0; |
784 | } | |
785 | ||
b20b0b66 FB |
786 | r = fopen_temporary_label("/etc/gshadow", gshadow_path, &gshadow, &gshadow_tmp); |
787 | if (r < 0) | |
4c795066 | 788 | return log_error_errno(r, "Failed to open temporary copy of %s: %m", gshadow_path); |
9ab315cc | 789 | |
b20b0b66 FB |
790 | original = fopen(gshadow_path, "re"); |
791 | if (original) { | |
792 | struct sgrp *sg; | |
793 | ||
82855aa6 | 794 | r = copy_rights_with_fallback(fileno(original), fileno(gshadow), gshadow_tmp); |
1b992147 | 795 | if (r < 0) |
4c795066 | 796 | return log_error_errno(r, "Failed to copy permissions from %s to %s: %m", |
335f6ab4 | 797 | gshadow_path, gshadow_tmp); |
9ab315cc | 798 | |
100d5f6e | 799 | while ((r = fgetsgent_sane(original, &sg)) > 0) { |
c5abf225 | 800 | |
5bc9c980 | 801 | i = ordered_hashmap_get(groups, sg->sg_namp); |
330d1def ZJS |
802 | if (i && i->todo_group) |
803 | return log_error_errno(SYNTHETIC_ERRNO(EEXIST), | |
804 | "%s: Group \"%s\" already exists.", | |
805 | gshadow_path, sg->sg_namp); | |
9ab315cc | 806 | |
b20b0b66 | 807 | r = putsgent_with_members(sg, gshadow); |
fff19499 | 808 | if (r < 0) |
4c795066 | 809 | return log_error_errno(r, "Failed to add existing group \"%s\" to temporary gshadow file: %m", |
335f6ab4 | 810 | sg->sg_namp); |
b20b0b66 FB |
811 | if (r > 0) |
812 | group_changed = true; | |
b20b0b66 | 813 | } |
100d5f6e FB |
814 | if (r < 0) |
815 | return r; | |
1dd98a71 FB |
816 | |
817 | } else { | |
818 | if (errno != ENOENT) | |
4c795066 | 819 | return log_error_errno(errno, "Failed to open %s: %m", gshadow_path); |
1dd98a71 | 820 | if (fchmod(fileno(gshadow), 0000) < 0) |
4c795066 | 821 | return log_error_errno(errno, "Failed to fchmod %s: %m", gshadow_tmp); |
b20b0b66 | 822 | } |
9ab315cc | 823 | |
90e74a66 | 824 | ORDERED_HASHMAP_FOREACH(i, todo_gids) { |
b20b0b66 FB |
825 | struct sgrp n = { |
826 | .sg_namp = i->name, | |
53c25ac9 | 827 | .sg_passwd = (char*) PASSWORD_LOCKED_AND_INVALID, |
b20b0b66 | 828 | }; |
9ab315cc | 829 | |
b20b0b66 | 830 | r = putsgent_with_members(&n, gshadow); |
9ab315cc | 831 | if (r < 0) |
4c795066 | 832 | return log_error_errno(r, "Failed to add new group \"%s\" to temporary gshadow file: %m", |
335f6ab4 | 833 | n.sg_namp); |
b20b0b66 FB |
834 | |
835 | group_changed = true; | |
9ab315cc LP |
836 | } |
837 | ||
0675e94a | 838 | r = fflush_sync_and_check(gshadow); |
b20b0b66 | 839 | if (r < 0) |
4c795066 | 840 | return log_error_errno(r, "Failed to flush %s: %m", gshadow_tmp); |
b20b0b66 | 841 | |
9ab315cc | 842 | if (group_changed) { |
1cc6c93a YW |
843 | *tmpfile = TAKE_PTR(gshadow); |
844 | *tmpfile_path = TAKE_PTR(gshadow_tmp); | |
b20b0b66 | 845 | } |
b14e1b43 | 846 | #endif |
62d1c93a | 847 | return 0; |
b20b0b66 FB |
848 | } |
849 | ||
850 | static int write_files(void) { | |
b20b0b66 | 851 | _cleanup_fclose_ FILE *passwd = NULL, *group = NULL, *shadow = NULL, *gshadow = NULL; |
1dd98a71 | 852 | _cleanup_(unlink_and_freep) char *passwd_tmp = NULL, *group_tmp = NULL, *shadow_tmp = NULL, *gshadow_tmp = NULL; |
62d1c93a | 853 | const char *passwd_path, *shadow_path, *group_path, *gshadow_path; |
b20b0b66 FB |
854 | int r; |
855 | ||
856 | passwd_path = prefix_roota(arg_root, "/etc/passwd"); | |
857 | shadow_path = prefix_roota(arg_root, "/etc/shadow"); | |
858 | group_path = prefix_roota(arg_root, "/etc/group"); | |
859 | gshadow_path = prefix_roota(arg_root, "/etc/gshadow"); | |
860 | ||
861 | r = write_temporary_group(group_path, &group, &group_tmp); | |
862 | if (r < 0) | |
1dd98a71 | 863 | return r; |
b20b0b66 FB |
864 | |
865 | r = write_temporary_gshadow(gshadow_path, &gshadow, &gshadow_tmp); | |
866 | if (r < 0) | |
1dd98a71 | 867 | return r; |
b20b0b66 FB |
868 | |
869 | r = write_temporary_passwd(passwd_path, &passwd, &passwd_tmp); | |
870 | if (r < 0) | |
1dd98a71 | 871 | return r; |
b20b0b66 FB |
872 | |
873 | r = write_temporary_shadow(shadow_path, &shadow, &shadow_tmp); | |
874 | if (r < 0) | |
1dd98a71 | 875 | return r; |
b20b0b66 FB |
876 | |
877 | /* Make a backup of the old files */ | |
878 | if (group) { | |
879 | r = make_backup("/etc/group", group_path); | |
880 | if (r < 0) | |
4c795066 | 881 | return log_error_errno(r, "Failed to make backup %s: %m", group_path); |
b20b0b66 FB |
882 | } |
883 | if (gshadow) { | |
884 | r = make_backup("/etc/gshadow", gshadow_path); | |
885 | if (r < 0) | |
4c795066 | 886 | return log_error_errno(r, "Failed to make backup %s: %m", gshadow_path); |
1b992147 LP |
887 | } |
888 | ||
889 | if (passwd) { | |
9f1c1940 | 890 | r = make_backup("/etc/passwd", passwd_path); |
1b992147 | 891 | if (r < 0) |
4c795066 | 892 | return log_error_errno(r, "Failed to make backup %s: %m", passwd_path); |
1b992147 | 893 | } |
9ab315cc LP |
894 | if (shadow) { |
895 | r = make_backup("/etc/shadow", shadow_path); | |
896 | if (r < 0) | |
4c795066 | 897 | return log_error_errno(r, "Failed to make backup %s: %m", shadow_path); |
9ab315cc | 898 | } |
1b992147 LP |
899 | |
900 | /* And make the new files count */ | |
b20b0b66 | 901 | if (group) { |
2da3dc69 | 902 | r = rename_and_apply_smack_floor_label(group_tmp, group_path); |
b20b0b66 | 903 | if (r < 0) |
4c795066 | 904 | return log_error_errno(r, "Failed to rename %s to %s: %m", |
335f6ab4 | 905 | group_tmp, group_path); |
b20b0b66 | 906 | group_tmp = mfree(group_tmp); |
d481b830 FB |
907 | |
908 | if (!arg_root && !arg_image) | |
909 | (void) nscd_flush_cache(STRV_MAKE("group")); | |
b20b0b66 FB |
910 | } |
911 | if (gshadow) { | |
2da3dc69 | 912 | r = rename_and_apply_smack_floor_label(gshadow_tmp, gshadow_path); |
b20b0b66 | 913 | if (r < 0) |
4c795066 | 914 | return log_error_errno(r, "Failed to rename %s to %s: %m", |
335f6ab4 | 915 | gshadow_tmp, gshadow_path); |
1b992147 | 916 | |
b20b0b66 | 917 | gshadow_tmp = mfree(gshadow_tmp); |
1b992147 LP |
918 | } |
919 | ||
920 | if (passwd) { | |
2da3dc69 | 921 | r = rename_and_apply_smack_floor_label(passwd_tmp, passwd_path); |
c02e7b1e | 922 | if (r < 0) |
4c795066 | 923 | return log_error_errno(r, "Failed to rename %s to %s: %m", |
335f6ab4 | 924 | passwd_tmp, passwd_path); |
1b992147 | 925 | |
97b11eed | 926 | passwd_tmp = mfree(passwd_tmp); |
d481b830 FB |
927 | |
928 | if (!arg_root && !arg_image) | |
929 | (void) nscd_flush_cache(STRV_MAKE("passwd")); | |
1b992147 | 930 | } |
9ab315cc | 931 | if (shadow) { |
2da3dc69 | 932 | r = rename_and_apply_smack_floor_label(shadow_tmp, shadow_path); |
c02e7b1e | 933 | if (r < 0) |
4c795066 | 934 | return log_error_errno(r, "Failed to rename %s to %s: %m", |
335f6ab4 | 935 | shadow_tmp, shadow_path); |
9ab315cc | 936 | |
97b11eed | 937 | shadow_tmp = mfree(shadow_tmp); |
9ab315cc | 938 | } |
1b992147 | 939 | |
1dd98a71 | 940 | return 0; |
1b992147 LP |
941 | } |
942 | ||
b9ee05c2 | 943 | static int uid_is_ok(uid_t uid, const char *name, bool check_with_gid) { |
1b992147 LP |
944 | |
945 | /* Let's see if we already have assigned the UID a second time */ | |
5bc9c980 | 946 | if (ordered_hashmap_get(todo_uids, UID_TO_PTR(uid))) |
1b992147 LP |
947 | return 0; |
948 | ||
949 | /* Try to avoid using uids that are already used by a group | |
950 | * that doesn't have the same name as our new user. */ | |
b9ee05c2 | 951 | if (check_with_gid) { |
62d1c93a ZJS |
952 | Item *i; |
953 | ||
b9ee05c2 MV |
954 | i = ordered_hashmap_get(todo_gids, GID_TO_PTR(uid)); |
955 | if (i && !streq(i->name, name)) | |
956 | return 0; | |
957 | } | |
1b992147 LP |
958 | |
959 | /* Let's check the files directly */ | |
71da1673 | 960 | if (hashmap_contains(database_by_uid, UID_TO_PTR(uid))) |
1b992147 LP |
961 | return 0; |
962 | ||
b9ee05c2 | 963 | if (check_with_gid) { |
62d1c93a ZJS |
964 | const char *n; |
965 | ||
71da1673 | 966 | n = hashmap_get(database_by_gid, GID_TO_PTR(uid)); |
b9ee05c2 MV |
967 | if (n && !streq(n, name)) |
968 | return 0; | |
969 | } | |
1b992147 LP |
970 | |
971 | /* Let's also check via NSS, to avoid UID clashes over LDAP and such, just in case */ | |
972 | if (!arg_root) { | |
62d1c93a ZJS |
973 | struct passwd *p; |
974 | struct group *g; | |
975 | ||
1b992147 LP |
976 | errno = 0; |
977 | p = getpwuid(uid); | |
978 | if (p) | |
979 | return 0; | |
b0284aba | 980 | if (!IN_SET(errno, 0, ENOENT)) |
1b992147 LP |
981 | return -errno; |
982 | ||
b9ee05c2 MV |
983 | if (check_with_gid) { |
984 | errno = 0; | |
985 | g = getgrgid((gid_t) uid); | |
986 | if (g) { | |
987 | if (!streq(g->gr_name, name)) | |
988 | return 0; | |
989 | } else if (!IN_SET(errno, 0, ENOENT)) | |
990 | return -errno; | |
991 | } | |
1b992147 LP |
992 | } |
993 | ||
994 | return 1; | |
995 | } | |
996 | ||
997 | static int root_stat(const char *p, struct stat *st) { | |
998 | const char *fix; | |
999 | ||
1d13f648 | 1000 | fix = prefix_roota(arg_root, p); |
7c248223 | 1001 | return RET_NERRNO(stat(fix, st)); |
1b992147 LP |
1002 | } |
1003 | ||
905ec0c0 | 1004 | static int read_id_from_file(Item *i, uid_t *ret_uid, gid_t *ret_gid) { |
1b992147 LP |
1005 | struct stat st; |
1006 | bool found_uid = false, found_gid = false; | |
56d21cde PDS |
1007 | uid_t uid = 0; |
1008 | gid_t gid = 0; | |
1b992147 LP |
1009 | |
1010 | assert(i); | |
1011 | ||
3f316701 | 1012 | /* First, try to get the GID directly */ |
905ec0c0 | 1013 | if (ret_gid && i->gid_path && root_stat(i->gid_path, &st) >= 0) { |
1b992147 LP |
1014 | gid = st.st_gid; |
1015 | found_gid = true; | |
1016 | } | |
1017 | ||
3f316701 | 1018 | /* Then, try to get the UID directly */ |
905ec0c0 | 1019 | if ((ret_uid || (ret_gid && !found_gid)) |
1b992147 LP |
1020 | && i->uid_path |
1021 | && root_stat(i->uid_path, &st) >= 0) { | |
1022 | ||
1023 | uid = st.st_uid; | |
1024 | found_uid = true; | |
1025 | ||
3f316701 | 1026 | /* If we need the gid, but had no success yet, also derive it from the UID path */ |
905ec0c0 | 1027 | if (ret_gid && !found_gid) { |
1b992147 LP |
1028 | gid = st.st_gid; |
1029 | found_gid = true; | |
1030 | } | |
1031 | } | |
1032 | ||
3f316701 | 1033 | /* If that didn't work yet, then let's reuse the GID as UID */ |
905ec0c0 | 1034 | if (ret_uid && !found_uid && i->gid_path) { |
1b992147 LP |
1035 | |
1036 | if (found_gid) { | |
1037 | uid = (uid_t) gid; | |
1038 | found_uid = true; | |
1039 | } else if (root_stat(i->gid_path, &st) >= 0) { | |
1040 | uid = (uid_t) st.st_gid; | |
1041 | found_uid = true; | |
1042 | } | |
1043 | } | |
1044 | ||
905ec0c0 | 1045 | if (ret_uid) { |
1b992147 LP |
1046 | if (!found_uid) |
1047 | return 0; | |
1048 | ||
905ec0c0 | 1049 | *ret_uid = uid; |
1b992147 LP |
1050 | } |
1051 | ||
905ec0c0 | 1052 | if (ret_gid) { |
1b992147 LP |
1053 | if (!found_gid) |
1054 | return 0; | |
1055 | ||
905ec0c0 | 1056 | *ret_gid = gid; |
1b992147 LP |
1057 | } |
1058 | ||
1059 | return 1; | |
1060 | } | |
1061 | ||
1062 | static int add_user(Item *i) { | |
1063 | void *z; | |
1064 | int r; | |
1065 | ||
1066 | assert(i); | |
1067 | ||
1068 | /* Check the database directly */ | |
71da1673 | 1069 | z = hashmap_get(database_by_username, i->name); |
1b992147 LP |
1070 | if (z) { |
1071 | log_debug("User %s already exists.", i->name); | |
c1b6b04f | 1072 | i->uid = PTR_TO_UID(z); |
1b992147 LP |
1073 | i->uid_set = true; |
1074 | return 0; | |
1075 | } | |
1076 | ||
1077 | if (!arg_root) { | |
1078 | struct passwd *p; | |
1b992147 LP |
1079 | |
1080 | /* Also check NSS */ | |
1081 | errno = 0; | |
1082 | p = getpwnam(i->name); | |
1083 | if (p) { | |
1084 | log_debug("User %s already exists.", i->name); | |
1085 | i->uid = p->pw_uid; | |
1086 | i->uid_set = true; | |
1087 | ||
2fc09a9c DM |
1088 | r = free_and_strdup(&i->description, p->pw_gecos); |
1089 | if (r < 0) | |
1090 | return log_oom(); | |
1091 | ||
1b992147 LP |
1092 | return 0; |
1093 | } | |
08c7c321 | 1094 | if (!errno_is_not_exists(errno)) |
4a62c710 | 1095 | return log_error_errno(errno, "Failed to check if user %s already exists: %m", i->name); |
1b992147 LP |
1096 | } |
1097 | ||
3f316701 | 1098 | /* Try to use the suggested numeric UID */ |
1b992147 | 1099 | if (i->uid_set) { |
b9ee05c2 | 1100 | r = uid_is_ok(i->uid, i->name, !i->id_set_strict); |
f647962d | 1101 | if (r < 0) |
3f316701 | 1102 | return log_error_errno(r, "Failed to verify UID " UID_FMT ": %m", i->uid); |
1b992147 | 1103 | if (r == 0) { |
5374bc7c | 1104 | log_info("Suggested user ID " UID_FMT " for %s already used.", i->uid, i->name); |
1b992147 LP |
1105 | i->uid_set = false; |
1106 | } | |
1107 | } | |
1108 | ||
1109 | /* If that didn't work, try to read it from the specified path */ | |
1110 | if (!i->uid_set) { | |
1111 | uid_t c; | |
1112 | ||
1113 | if (read_id_from_file(i, &c, NULL) > 0) { | |
1114 | ||
8dcc66ce | 1115 | if (c <= 0 || !uid_range_contains(uid_range, c)) |
1b992147 LP |
1116 | log_debug("User ID " UID_FMT " of file not suitable for %s.", c, i->name); |
1117 | else { | |
b9ee05c2 | 1118 | r = uid_is_ok(c, i->name, true); |
f647962d | 1119 | if (r < 0) |
3f316701 | 1120 | return log_error_errno(r, "Failed to verify UID " UID_FMT ": %m", i->uid); |
f647962d | 1121 | else if (r > 0) { |
1b992147 LP |
1122 | i->uid = c; |
1123 | i->uid_set = true; | |
1124 | } else | |
1125 | log_debug("User ID " UID_FMT " of file for %s is already used.", c, i->name); | |
1126 | } | |
1127 | } | |
1128 | } | |
1129 | ||
b938cb90 | 1130 | /* Otherwise, try to reuse the group ID */ |
1b992147 | 1131 | if (!i->uid_set && i->gid_set) { |
b9ee05c2 | 1132 | r = uid_is_ok((uid_t) i->gid, i->name, true); |
f647962d | 1133 | if (r < 0) |
3f316701 | 1134 | return log_error_errno(r, "Failed to verify UID " UID_FMT ": %m", i->uid); |
1b992147 LP |
1135 | if (r > 0) { |
1136 | i->uid = (uid_t) i->gid; | |
1137 | i->uid_set = true; | |
1138 | } | |
1139 | } | |
1140 | ||
1141 | /* And if that didn't work either, let's try to find a free one */ | |
1142 | if (!i->uid_set) { | |
4b6f9b20 ZJS |
1143 | maybe_emit_login_defs_warning(); |
1144 | ||
8530dc44 | 1145 | for (;;) { |
8dcc66ce | 1146 | r = uid_range_next_lower(uid_range, &search_uid); |
330d1def ZJS |
1147 | if (r < 0) |
1148 | return log_error_errno(r, "No free user ID available for %s.", i->name); | |
1b992147 | 1149 | |
b9ee05c2 | 1150 | r = uid_is_ok(search_uid, i->name, true); |
f647962d | 1151 | if (r < 0) |
3f316701 | 1152 | return log_error_errno(r, "Failed to verify UID " UID_FMT ": %m", i->uid); |
f647962d | 1153 | else if (r > 0) |
1b992147 LP |
1154 | break; |
1155 | } | |
1156 | ||
1b992147 LP |
1157 | i->uid_set = true; |
1158 | i->uid = search_uid; | |
1b992147 LP |
1159 | } |
1160 | ||
1dfb9321 SS |
1161 | r = ordered_hashmap_ensure_put(&todo_uids, NULL, UID_TO_PTR(i->uid), i); |
1162 | if (r == -EEXIST) | |
3f316701 | 1163 | return log_error_errno(r, "Requested user %s with UID " UID_FMT " and gid" GID_FMT " to be created is duplicated " |
1dfb9321 SS |
1164 | "or conflicts with another user.", i->name, i->uid, i->gid); |
1165 | if (r == -ENOMEM) | |
1b992147 | 1166 | return log_oom(); |
1b992147 | 1167 | if (r < 0) |
3f316701 | 1168 | return log_error_errno(r, "Failed to store user %s with UID " UID_FMT " and GID " GID_FMT " to be created: %m", |
1dfb9321 | 1169 | i->name, i->uid, i->gid); |
1b992147 | 1170 | |
c1b6b04f | 1171 | i->todo_user = true; |
9a5af4b7 | 1172 | log_info("Creating user '%s' (%s) with UID " UID_FMT " and GID " GID_FMT ".", |
62d1c93a | 1173 | i->name, strna(i->description), i->uid, i->gid); |
1b992147 LP |
1174 | |
1175 | return 0; | |
1176 | } | |
1177 | ||
4ae3e8c9 | 1178 | static int gid_is_ok(gid_t gid, const char *groupname, bool check_with_uid) { |
1b992147 LP |
1179 | struct group *g; |
1180 | struct passwd *p; | |
4ae3e8c9 LB |
1181 | Item *user; |
1182 | char *username; | |
1183 | ||
1184 | assert(groupname); | |
1b992147 | 1185 | |
5bc9c980 | 1186 | if (ordered_hashmap_get(todo_gids, GID_TO_PTR(gid))) |
1b992147 LP |
1187 | return 0; |
1188 | ||
1189 | /* Avoid reusing gids that are already used by a different user */ | |
4ae3e8c9 LB |
1190 | if (check_with_uid) { |
1191 | user = ordered_hashmap_get(todo_uids, UID_TO_PTR(gid)); | |
1192 | if (user && !streq(user->name, groupname)) | |
1193 | return 0; | |
1194 | } | |
1b992147 | 1195 | |
71da1673 | 1196 | if (hashmap_contains(database_by_gid, GID_TO_PTR(gid))) |
1b992147 LP |
1197 | return 0; |
1198 | ||
4ae3e8c9 LB |
1199 | if (check_with_uid) { |
1200 | username = hashmap_get(database_by_uid, UID_TO_PTR(gid)); | |
1201 | if (username && !streq(username, groupname)) | |
1202 | return 0; | |
1203 | } | |
1b992147 LP |
1204 | |
1205 | if (!arg_root) { | |
1206 | errno = 0; | |
1207 | g = getgrgid(gid); | |
1208 | if (g) | |
1209 | return 0; | |
b0284aba | 1210 | if (!IN_SET(errno, 0, ENOENT)) |
1b992147 LP |
1211 | return -errno; |
1212 | ||
6b6e45eb LB |
1213 | if (check_with_uid) { |
1214 | errno = 0; | |
1215 | p = getpwuid((uid_t) gid); | |
1216 | if (p) | |
1217 | return 0; | |
1218 | if (!IN_SET(errno, 0, ENOENT)) | |
1219 | return -errno; | |
1220 | } | |
1b992147 LP |
1221 | } |
1222 | ||
1223 | return 1; | |
1224 | } | |
1225 | ||
649916d3 | 1226 | static int get_gid_by_name(const char *name, gid_t *gid) { |
1b992147 | 1227 | void *z; |
1b992147 | 1228 | |
649916d3 | 1229 | assert(gid); |
1b992147 LP |
1230 | |
1231 | /* Check the database directly */ | |
649916d3 | 1232 | z = hashmap_get(database_by_groupname, name); |
1b992147 | 1233 | if (z) { |
649916d3 | 1234 | *gid = PTR_TO_GID(z); |
1b992147 LP |
1235 | return 0; |
1236 | } | |
1237 | ||
1238 | /* Also check NSS */ | |
1239 | if (!arg_root) { | |
1240 | struct group *g; | |
1241 | ||
1242 | errno = 0; | |
649916d3 | 1243 | g = getgrnam(name); |
1b992147 | 1244 | if (g) { |
649916d3 | 1245 | *gid = g->gr_gid; |
1b992147 LP |
1246 | return 0; |
1247 | } | |
08c7c321 | 1248 | if (!errno_is_not_exists(errno)) |
649916d3 DM |
1249 | return log_error_errno(errno, "Failed to check if group %s already exists: %m", name); |
1250 | } | |
1251 | ||
1252 | return -ENOENT; | |
1253 | } | |
1254 | ||
1255 | static int add_group(Item *i) { | |
1256 | int r; | |
1257 | ||
1258 | assert(i); | |
1259 | ||
1260 | r = get_gid_by_name(i->name, &i->gid); | |
1261 | if (r != -ENOENT) { | |
1262 | if (r < 0) | |
1263 | return r; | |
1264 | log_debug("Group %s already exists.", i->name); | |
1265 | i->gid_set = true; | |
1266 | return 0; | |
1b992147 LP |
1267 | } |
1268 | ||
3f316701 | 1269 | /* Try to use the suggested numeric GID */ |
1b992147 | 1270 | if (i->gid_set) { |
4ae3e8c9 | 1271 | r = gid_is_ok(i->gid, i->name, false); |
f647962d | 1272 | if (r < 0) |
3f316701 | 1273 | return log_error_errno(r, "Failed to verify GID " GID_FMT ": %m", i->gid); |
b9ee05c2 | 1274 | if (i->id_set_strict) { |
3f316701 ZJS |
1275 | /* If we require the GID to already exist we can return here: |
1276 | * r > 0: means the GID does not exist -> fail | |
1277 | * r == 0: means the GID exists -> nothing more to do. | |
28e7fad7 | 1278 | */ |
baaa35ad ZJS |
1279 | if (r > 0) |
1280 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
c0f86d66 | 1281 | "Failed to create %s: please create GID " GID_FMT, |
baaa35ad | 1282 | i->name, i->gid); |
28e7fad7 MV |
1283 | if (r == 0) |
1284 | return 0; | |
1285 | } | |
1b992147 | 1286 | if (r == 0) { |
5374bc7c | 1287 | log_info("Suggested group ID " GID_FMT " for %s already used.", i->gid, i->name); |
1b992147 LP |
1288 | i->gid_set = false; |
1289 | } | |
1290 | } | |
1291 | ||
1292 | /* Try to reuse the numeric uid, if there's one */ | |
1293 | if (!i->gid_set && i->uid_set) { | |
4ae3e8c9 | 1294 | r = gid_is_ok((gid_t) i->uid, i->name, true); |
f647962d | 1295 | if (r < 0) |
3f316701 | 1296 | return log_error_errno(r, "Failed to verify GID " GID_FMT ": %m", i->gid); |
1b992147 LP |
1297 | if (r > 0) { |
1298 | i->gid = (gid_t) i->uid; | |
1299 | i->gid_set = true; | |
1300 | } | |
1301 | } | |
1302 | ||
1303 | /* If that didn't work, try to read it from the specified path */ | |
1304 | if (!i->gid_set) { | |
1305 | gid_t c; | |
1306 | ||
1307 | if (read_id_from_file(i, NULL, &c) > 0) { | |
1308 | ||
8dcc66ce | 1309 | if (c <= 0 || !uid_range_contains(uid_range, c)) |
1b992147 LP |
1310 | log_debug("Group ID " GID_FMT " of file not suitable for %s.", c, i->name); |
1311 | else { | |
4ae3e8c9 | 1312 | r = gid_is_ok(c, i->name, true); |
f647962d | 1313 | if (r < 0) |
3f316701 | 1314 | return log_error_errno(r, "Failed to verify GID " GID_FMT ": %m", i->gid); |
f647962d | 1315 | else if (r > 0) { |
1b992147 LP |
1316 | i->gid = c; |
1317 | i->gid_set = true; | |
1318 | } else | |
1319 | log_debug("Group ID " GID_FMT " of file for %s already used.", c, i->name); | |
1320 | } | |
1321 | } | |
1322 | } | |
1323 | ||
1324 | /* And if that didn't work either, let's try to find a free one */ | |
1325 | if (!i->gid_set) { | |
4b6f9b20 ZJS |
1326 | maybe_emit_login_defs_warning(); |
1327 | ||
8530dc44 LP |
1328 | for (;;) { |
1329 | /* We look for new GIDs in the UID pool! */ | |
8dcc66ce | 1330 | r = uid_range_next_lower(uid_range, &search_uid); |
330d1def ZJS |
1331 | if (r < 0) |
1332 | return log_error_errno(r, "No free group ID available for %s.", i->name); | |
8530dc44 | 1333 | |
4ae3e8c9 | 1334 | r = gid_is_ok(search_uid, i->name, true); |
f647962d | 1335 | if (r < 0) |
3f316701 | 1336 | return log_error_errno(r, "Failed to verify GID " GID_FMT ": %m", i->gid); |
f647962d | 1337 | else if (r > 0) |
1b992147 LP |
1338 | break; |
1339 | } | |
1340 | ||
1b992147 | 1341 | i->gid_set = true; |
8530dc44 | 1342 | i->gid = search_uid; |
1b992147 LP |
1343 | } |
1344 | ||
1dfb9321 SS |
1345 | r = ordered_hashmap_ensure_put(&todo_gids, NULL, GID_TO_PTR(i->gid), i); |
1346 | if (r == -EEXIST) | |
3f316701 | 1347 | return log_error_errno(r, "Requested group %s with GID "GID_FMT " to be created is duplicated or conflicts with another user.", i->name, i->gid); |
1dfb9321 | 1348 | if (r == -ENOMEM) |
1b992147 | 1349 | return log_oom(); |
1b992147 | 1350 | if (r < 0) |
3f316701 | 1351 | return log_error_errno(r, "Failed to store group %s with GID " GID_FMT " to be created: %m", i->name, i->gid); |
1b992147 | 1352 | |
c1b6b04f | 1353 | i->todo_group = true; |
9a5af4b7 | 1354 | log_info("Creating group '%s' with GID " GID_FMT ".", i->name, i->gid); |
1b992147 LP |
1355 | |
1356 | return 0; | |
1357 | } | |
1358 | ||
1359 | static int process_item(Item *i) { | |
1360 | int r; | |
1361 | ||
1362 | assert(i); | |
1363 | ||
1364 | switch (i->type) { | |
1365 | ||
b5327d0a | 1366 | case ADD_USER: { |
5ed47c4d LB |
1367 | Item *j = NULL; |
1368 | ||
1369 | if (!i->gid_set) | |
1370 | j = ordered_hashmap_get(groups, i->group_name ?: i->name); | |
b5327d0a | 1371 | |
b5327d0a | 1372 | if (j && j->todo_group) { |
649916d3 | 1373 | /* When a group with the target name is already in queue, |
b5327d0a YW |
1374 | * use the information about the group and do not create |
1375 | * duplicated group entry. */ | |
1376 | i->gid_set = j->gid_set; | |
1377 | i->gid = j->gid; | |
1378 | i->id_set_strict = true; | |
649916d3 DM |
1379 | } else if (i->group_name) { |
1380 | /* When a group name was given instead of a GID and it's | |
1381 | * not in queue, then it must already exist. */ | |
1382 | r = get_gid_by_name(i->group_name, &i->gid); | |
1383 | if (r < 0) | |
1384 | return log_error_errno(r, "Group %s not found.", i->group_name); | |
1385 | i->gid_set = true; | |
1386 | i->id_set_strict = true; | |
b5327d0a YW |
1387 | } else { |
1388 | r = add_group(i); | |
1389 | if (r < 0) | |
1390 | return r; | |
1391 | } | |
1b992147 LP |
1392 | |
1393 | return add_user(i); | |
b5327d0a | 1394 | } |
1b992147 | 1395 | |
e2c2060f | 1396 | case ADD_GROUP: |
1b992147 | 1397 | return add_group(i); |
1b992147 | 1398 | |
a12b0cc3 | 1399 | default: |
04499a70 | 1400 | assert_not_reached(); |
a12b0cc3 | 1401 | } |
1b992147 LP |
1402 | } |
1403 | ||
71da1673 | 1404 | static Item* item_free(Item *i) { |
1b992147 | 1405 | if (!i) |
71da1673 | 1406 | return NULL; |
1b992147 LP |
1407 | |
1408 | free(i->name); | |
649916d3 | 1409 | free(i->group_name); |
1b992147 LP |
1410 | free(i->uid_path); |
1411 | free(i->gid_path); | |
1412 | free(i->description); | |
d9b8ea54 | 1413 | free(i->home); |
7b1aaf66 | 1414 | free(i->shell); |
71da1673 | 1415 | return mfree(i); |
1b992147 LP |
1416 | } |
1417 | ||
1418 | DEFINE_TRIVIAL_CLEANUP_FUNC(Item*, item_free); | |
71da1673 | 1419 | DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(item_hash_ops, char, string_hash_func, string_compare_func, Item, item_free); |
1b992147 | 1420 | |
a12b0cc3 LP |
1421 | static int add_implicit(void) { |
1422 | char *g, **l; | |
a12b0cc3 LP |
1423 | int r; |
1424 | ||
1425 | /* Implicitly create additional users and groups, if they were listed in "m" lines */ | |
90e74a66 | 1426 | ORDERED_HASHMAP_FOREACH_KEY(l, g, members) { |
d4f0412d YW |
1427 | STRV_FOREACH(m, l) |
1428 | if (!ordered_hashmap_get(users, *m)) { | |
a12b0cc3 LP |
1429 | _cleanup_(item_freep) Item *j = NULL; |
1430 | ||
a12b0cc3 LP |
1431 | j = new0(Item, 1); |
1432 | if (!j) | |
1433 | return log_oom(); | |
1434 | ||
1435 | j->type = ADD_USER; | |
1436 | j->name = strdup(*m); | |
1437 | if (!j->name) | |
1438 | return log_oom(); | |
1439 | ||
f334deba SS |
1440 | r = ordered_hashmap_ensure_put(&users, &item_hash_ops, j->name, j); |
1441 | if (r == -ENOMEM) | |
a12b0cc3 | 1442 | return log_oom(); |
f334deba SS |
1443 | if (r < 0) |
1444 | return log_error_errno(r, "Failed to add implicit user '%s': %m", j->name); | |
a12b0cc3 LP |
1445 | |
1446 | log_debug("Adding implicit user '%s' due to m line", j->name); | |
f334deba | 1447 | TAKE_PTR(j); |
a12b0cc3 | 1448 | } |
d4f0412d YW |
1449 | |
1450 | if (!(ordered_hashmap_get(users, g) || | |
1451 | ordered_hashmap_get(groups, g))) { | |
1452 | _cleanup_(item_freep) Item *j = NULL; | |
1453 | ||
d4f0412d YW |
1454 | j = new0(Item, 1); |
1455 | if (!j) | |
1456 | return log_oom(); | |
1457 | ||
1458 | j->type = ADD_GROUP; | |
1459 | j->name = strdup(g); | |
1460 | if (!j->name) | |
1461 | return log_oom(); | |
1462 | ||
f334deba SS |
1463 | r = ordered_hashmap_ensure_put(&groups, &item_hash_ops, j->name, j); |
1464 | if (r == -ENOMEM) | |
d4f0412d | 1465 | return log_oom(); |
f334deba SS |
1466 | if (r < 0) |
1467 | return log_error_errno(r, "Failed to add implicit group '%s': %m", j->name); | |
d4f0412d YW |
1468 | |
1469 | log_debug("Adding implicit group '%s' due to m line", j->name); | |
f334deba | 1470 | TAKE_PTR(j); |
a12b0cc3 LP |
1471 | } |
1472 | } | |
1473 | ||
1474 | return 0; | |
1475 | } | |
1476 | ||
5f465fda ZJS |
1477 | static int item_equivalent(Item *a, Item *b) { |
1478 | int r; | |
1479 | ||
1b992147 LP |
1480 | assert(a); |
1481 | assert(b); | |
1482 | ||
1483 | if (a->type != b->type) | |
1484 | return false; | |
1485 | ||
1486 | if (!streq_ptr(a->name, b->name)) | |
1487 | return false; | |
1488 | ||
5f465fda | 1489 | /* Paths were simplified previously, so we can use streq. */ |
1b992147 LP |
1490 | if (!streq_ptr(a->uid_path, b->uid_path)) |
1491 | return false; | |
1492 | ||
1493 | if (!streq_ptr(a->gid_path, b->gid_path)) | |
1494 | return false; | |
1495 | ||
1496 | if (!streq_ptr(a->description, b->description)) | |
1497 | return false; | |
1498 | ||
1499 | if (a->uid_set != b->uid_set) | |
1500 | return false; | |
1501 | ||
1502 | if (a->uid_set && a->uid != b->uid) | |
1503 | return false; | |
1504 | ||
1505 | if (a->gid_set != b->gid_set) | |
1506 | return false; | |
1507 | ||
1508 | if (a->gid_set && a->gid != b->gid) | |
1509 | return false; | |
1510 | ||
7629889c LP |
1511 | if (!streq_ptr(a->home, b->home)) |
1512 | return false; | |
1513 | ||
5f465fda ZJS |
1514 | /* Check if the two paths refer to the same file. |
1515 | * If the paths are equal (after normalization), it's obviously the same file. | |
1516 | * If both paths specify a nologin shell, treat them as the same (e.g. /bin/true and /bin/false). | |
1517 | * Otherwise, try to resolve the paths, and see if we get the same result, (e.g. /sbin/nologin and | |
1518 | * /usr/sbin/nologin). | |
1519 | * If we can't resolve something, treat different paths as different. */ | |
1520 | ||
1521 | const char *a_shell = pick_shell(a), | |
1522 | *b_shell = pick_shell(b); | |
1523 | if (!path_equal_ptr(a_shell, b_shell) && | |
1524 | !(is_nologin_shell(a_shell) && is_nologin_shell(b_shell))) { | |
1525 | _cleanup_free_ char *pa = NULL, *pb = NULL; | |
1526 | ||
1527 | r = chase_symlinks(a_shell, arg_root, CHASE_PREFIX_ROOT | CHASE_NONEXISTENT, &pa, NULL); | |
1528 | if (r < 0) { | |
1529 | log_full_errno(ERRNO_IS_RESOURCE(r) ? LOG_ERR : LOG_DEBUG, | |
1530 | r, "Failed to look up path '%s%s%s': %m", | |
1531 | strempty(arg_root), arg_root ? "/" : "", a_shell); | |
1532 | return ERRNO_IS_RESOURCE(r) ? r : false; | |
1533 | } | |
1534 | ||
1535 | r = chase_symlinks(b_shell, arg_root, CHASE_PREFIX_ROOT | CHASE_NONEXISTENT, &pb, NULL); | |
1536 | if (r < 0) { | |
1537 | log_full_errno(ERRNO_IS_RESOURCE(r) ? LOG_ERR : LOG_DEBUG, | |
1538 | r, "Failed to look up path '%s%s%s': %m", | |
1539 | strempty(arg_root), arg_root ? "/" : "", b_shell); | |
1540 | return ERRNO_IS_RESOURCE(r) ? r : false; | |
1541 | } | |
1542 | ||
1543 | if (!path_equal(pa, pb)) | |
1544 | return false; | |
1545 | } | |
7b1aaf66 | 1546 | |
1b992147 LP |
1547 | return true; |
1548 | } | |
1549 | ||
1b992147 | 1550 | static int parse_line(const char *fname, unsigned line, const char *buffer) { |
7b1aaf66 ZJS |
1551 | _cleanup_free_ char *action = NULL, |
1552 | *name = NULL, *resolved_name = NULL, | |
1553 | *id = NULL, *resolved_id = NULL, | |
b8bed700 YW |
1554 | *description = NULL, *resolved_description = NULL, |
1555 | *home = NULL, *resolved_home = NULL, | |
71fb1588 | 1556 | *shell = NULL, *resolved_shell = NULL; |
1b992147 LP |
1557 | _cleanup_(item_freep) Item *i = NULL; |
1558 | Item *existing; | |
5bc9c980 | 1559 | OrderedHashmap *h; |
7629889c LP |
1560 | int r; |
1561 | const char *p; | |
1b992147 LP |
1562 | |
1563 | assert(fname); | |
1564 | assert(line >= 1); | |
1565 | assert(buffer); | |
1566 | ||
7629889c LP |
1567 | /* Parse columns */ |
1568 | p = buffer; | |
4ec85141 | 1569 | r = extract_many_words(&p, NULL, EXTRACT_UNQUOTE, |
7b1aaf66 | 1570 | &action, &name, &id, &description, &home, &shell, NULL); |
330d1def | 1571 | if (r < 0) |
87c696f2 | 1572 | return log_syntax(NULL, LOG_ERR, fname, line, r, "Syntax error."); |
330d1def | 1573 | if (r < 2) |
87c696f2 ZJS |
1574 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), |
1575 | "Missing action and name columns."); | |
330d1def | 1576 | if (!isempty(p)) |
87c696f2 ZJS |
1577 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), |
1578 | "Trailing garbage."); | |
1b992147 | 1579 | |
7629889c | 1580 | /* Verify action */ |
330d1def | 1581 | if (strlen(action) != 1) |
87c696f2 ZJS |
1582 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), |
1583 | "Unknown modifier '%s'.", action); | |
1b992147 | 1584 | |
330d1def | 1585 | if (!IN_SET(action[0], ADD_USER, ADD_GROUP, ADD_MEMBER, ADD_RANGE)) |
87c696f2 ZJS |
1586 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EBADMSG), |
1587 | "Unknown command type '%c'.", action[0]); | |
1b992147 | 1588 | |
7629889c | 1589 | /* Verify name */ |
e7b88b7b | 1590 | if (empty_or_dash(name)) |
97b11eed | 1591 | name = mfree(name); |
1b992147 | 1592 | |
8530dc44 | 1593 | if (name) { |
de61a04b | 1594 | r = specifier_printf(name, NAME_MAX, system_and_tmp_specifier_table, arg_root, NULL, &resolved_name); |
330d1def | 1595 | if (r < 0) |
87c696f2 | 1596 | return log_syntax(NULL, LOG_ERR, fname, line, r, "Failed to replace specifiers in '%s': %m", name); |
8530dc44 | 1597 | |
7a8867ab | 1598 | if (!valid_user_group_name(resolved_name, 0)) |
87c696f2 ZJS |
1599 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), |
1600 | "'%s' is not a valid user or group name.", resolved_name); | |
1b992147 LP |
1601 | } |
1602 | ||
8530dc44 | 1603 | /* Verify id */ |
e7b88b7b | 1604 | if (empty_or_dash(id)) |
97b11eed | 1605 | id = mfree(id); |
7629889c | 1606 | |
8530dc44 | 1607 | if (id) { |
de61a04b | 1608 | r = specifier_printf(id, PATH_MAX-1, system_and_tmp_specifier_table, arg_root, NULL, &resolved_id); |
330d1def | 1609 | if (r < 0) |
87c696f2 ZJS |
1610 | return log_syntax(NULL, LOG_ERR, fname, line, r, |
1611 | "Failed to replace specifiers in '%s': %m", name); | |
8530dc44 LP |
1612 | } |
1613 | ||
1614 | /* Verify description */ | |
e7b88b7b | 1615 | if (empty_or_dash(description)) |
97b11eed | 1616 | description = mfree(description); |
1b992147 | 1617 | |
8530dc44 | 1618 | if (description) { |
de61a04b | 1619 | r = specifier_printf(description, LONG_LINE_MAX, system_and_tmp_specifier_table, arg_root, NULL, &resolved_description); |
330d1def | 1620 | if (r < 0) |
87c696f2 ZJS |
1621 | return log_syntax(NULL, LOG_ERR, fname, line, r, |
1622 | "Failed to replace specifiers in '%s': %m", description); | |
b8bed700 | 1623 | |
330d1def | 1624 | if (!valid_gecos(resolved_description)) |
87c696f2 ZJS |
1625 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), |
1626 | "'%s' is not a valid GECOS field.", resolved_description); | |
8530dc44 LP |
1627 | } |
1628 | ||
1629 | /* Verify home */ | |
e7b88b7b | 1630 | if (empty_or_dash(home)) |
97b11eed | 1631 | home = mfree(home); |
1b992147 | 1632 | |
8530dc44 | 1633 | if (home) { |
de61a04b | 1634 | r = specifier_printf(home, PATH_MAX-1, system_and_tmp_specifier_table, arg_root, NULL, &resolved_home); |
330d1def | 1635 | if (r < 0) |
87c696f2 ZJS |
1636 | return log_syntax(NULL, LOG_ERR, fname, line, r, |
1637 | "Failed to replace specifiers in '%s': %m", home); | |
b8bed700 | 1638 | |
eef74f91 ZJS |
1639 | path_simplify(resolved_home); |
1640 | ||
330d1def | 1641 | if (!valid_home(resolved_home)) |
87c696f2 ZJS |
1642 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), |
1643 | "'%s' is not a valid home directory field.", resolved_home); | |
8530dc44 LP |
1644 | } |
1645 | ||
7b1aaf66 | 1646 | /* Verify shell */ |
e7b88b7b | 1647 | if (empty_or_dash(shell)) |
7b1aaf66 ZJS |
1648 | shell = mfree(shell); |
1649 | ||
1650 | if (shell) { | |
de61a04b | 1651 | r = specifier_printf(shell, PATH_MAX-1, system_and_tmp_specifier_table, arg_root, NULL, &resolved_shell); |
330d1def | 1652 | if (r < 0) |
87c696f2 ZJS |
1653 | return log_syntax(NULL, LOG_ERR, fname, line, r, |
1654 | "Failed to replace specifiers in '%s': %m", shell); | |
7b1aaf66 | 1655 | |
eef74f91 ZJS |
1656 | path_simplify(resolved_shell); |
1657 | ||
330d1def | 1658 | if (!valid_shell(resolved_shell)) |
87c696f2 ZJS |
1659 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), |
1660 | "'%s' is not a valid login shell field.", resolved_shell); | |
7b1aaf66 ZJS |
1661 | } |
1662 | ||
a12b0cc3 | 1663 | switch (action[0]) { |
1b992147 | 1664 | |
8530dc44 | 1665 | case ADD_RANGE: |
330d1def | 1666 | if (resolved_name) |
87c696f2 ZJS |
1667 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), |
1668 | "Lines of type 'r' don't take a name field."); | |
330d1def ZJS |
1669 | |
1670 | if (!resolved_id) | |
87c696f2 ZJS |
1671 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), |
1672 | "Lines of type 'r' require an ID range in the third field."); | |
330d1def ZJS |
1673 | |
1674 | if (description || home || shell) | |
87c696f2 ZJS |
1675 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), |
1676 | "Lines of type '%c' don't take a %s field.", | |
1677 | action[0], | |
1678 | description ? "GECOS" : home ? "home directory" : "login shell"); | |
7629889c | 1679 | |
8dcc66ce | 1680 | r = uid_range_add_str(&uid_range, resolved_id); |
330d1def | 1681 | if (r < 0) |
87c696f2 ZJS |
1682 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), |
1683 | "Invalid UID range %s.", resolved_id); | |
1b992147 | 1684 | |
8530dc44 LP |
1685 | return 0; |
1686 | ||
1687 | case ADD_MEMBER: { | |
8530dc44 | 1688 | /* Try to extend an existing member or group item */ |
330d1def | 1689 | if (!name) |
87c696f2 ZJS |
1690 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), |
1691 | "Lines of type 'm' require a user name in the second field."); | |
330d1def ZJS |
1692 | |
1693 | if (!resolved_id) | |
87c696f2 ZJS |
1694 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), |
1695 | "Lines of type 'm' require a group name in the third field."); | |
330d1def | 1696 | |
7a8867ab | 1697 | if (!valid_user_group_name(resolved_id, 0)) |
87c696f2 ZJS |
1698 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), |
1699 | "'%s' is not a valid user or group name.", resolved_id); | |
330d1def ZJS |
1700 | |
1701 | if (description || home || shell) | |
87c696f2 ZJS |
1702 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), |
1703 | "Lines of type '%c' don't take a %s field.", | |
1704 | action[0], | |
1705 | description ? "GECOS" : home ? "home directory" : "login shell"); | |
8530dc44 | 1706 | |
cde79109 | 1707 | r = string_strv_ordered_hashmap_put(&members, resolved_id, resolved_name); |
7629889c | 1708 | if (r < 0) |
cde79109 | 1709 | return log_error_errno(r, "Failed to store mapping for %s: %m", resolved_id); |
a12b0cc3 LP |
1710 | |
1711 | return 0; | |
1b992147 LP |
1712 | } |
1713 | ||
a12b0cc3 | 1714 | case ADD_USER: |
330d1def | 1715 | if (!name) |
87c696f2 ZJS |
1716 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), |
1717 | "Lines of type 'u' require a user name in the second field."); | |
8530dc44 | 1718 | |
71da1673 | 1719 | r = ordered_hashmap_ensure_allocated(&users, &item_hash_ops); |
a12b0cc3 LP |
1720 | if (r < 0) |
1721 | return log_oom(); | |
1722 | ||
1723 | i = new0(Item, 1); | |
1724 | if (!i) | |
1725 | return log_oom(); | |
1726 | ||
8530dc44 LP |
1727 | if (resolved_id) { |
1728 | if (path_is_absolute(resolved_id)) { | |
1cc6c93a | 1729 | i->uid_path = TAKE_PTR(resolved_id); |
4ff361cc | 1730 | path_simplify(i->uid_path); |
a12b0cc3 | 1731 | } else { |
4cb41413 MV |
1732 | _cleanup_free_ char *uid = NULL, *gid = NULL; |
1733 | if (split_pair(resolved_id, ":", &uid, &gid) == 0) { | |
1734 | r = parse_gid(gid, &i->gid); | |
649916d3 | 1735 | if (r < 0) { |
7a8867ab | 1736 | if (valid_user_group_name(gid, 0)) |
649916d3 DM |
1737 | i->group_name = TAKE_PTR(gid); |
1738 | else | |
87c696f2 ZJS |
1739 | return log_syntax(NULL, LOG_ERR, fname, line, r, |
1740 | "Failed to parse GID: '%s': %m", id); | |
649916d3 DM |
1741 | } else { |
1742 | i->gid_set = true; | |
1743 | i->id_set_strict = true; | |
1744 | } | |
4cb41413 | 1745 | free_and_replace(resolved_id, uid); |
a12b0cc3 | 1746 | } |
1825c909 MV |
1747 | if (!streq(resolved_id, "-")) { |
1748 | r = parse_uid(resolved_id, &i->uid); | |
1749 | if (r < 0) | |
87c696f2 ZJS |
1750 | return log_syntax(NULL, LOG_ERR, fname, line, r, |
1751 | "Failed to parse UID: '%s': %m", id); | |
1825c909 MV |
1752 | i->uid_set = true; |
1753 | } | |
a12b0cc3 LP |
1754 | } |
1755 | } | |
1756 | ||
b8bed700 YW |
1757 | i->description = TAKE_PTR(resolved_description); |
1758 | i->home = TAKE_PTR(resolved_home); | |
1cc6c93a | 1759 | i->shell = TAKE_PTR(resolved_shell); |
7b1aaf66 | 1760 | |
1b992147 | 1761 | h = users; |
a12b0cc3 LP |
1762 | break; |
1763 | ||
1764 | case ADD_GROUP: | |
330d1def | 1765 | if (!name) |
87c696f2 ZJS |
1766 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), |
1767 | "Lines of type 'g' require a user name in the second field."); | |
a12b0cc3 | 1768 | |
330d1def | 1769 | if (description || home || shell) |
87c696f2 ZJS |
1770 | return log_syntax(NULL, LOG_ERR, fname, line, SYNTHETIC_ERRNO(EINVAL), |
1771 | "Lines of type '%c' don't take a %s field.", | |
1772 | action[0], | |
1773 | description ? "GECOS" : home ? "home directory" : "login shell"); | |
7629889c | 1774 | |
71da1673 | 1775 | r = ordered_hashmap_ensure_allocated(&groups, &item_hash_ops); |
7629889c LP |
1776 | if (r < 0) |
1777 | return log_oom(); | |
1778 | ||
a12b0cc3 LP |
1779 | i = new0(Item, 1); |
1780 | if (!i) | |
1781 | return log_oom(); | |
1782 | ||
8530dc44 LP |
1783 | if (resolved_id) { |
1784 | if (path_is_absolute(resolved_id)) { | |
1cc6c93a | 1785 | i->gid_path = TAKE_PTR(resolved_id); |
4ff361cc | 1786 | path_simplify(i->gid_path); |
a12b0cc3 | 1787 | } else { |
8530dc44 | 1788 | r = parse_gid(resolved_id, &i->gid); |
4cb41413 | 1789 | if (r < 0) |
87c696f2 ZJS |
1790 | return log_syntax(NULL, LOG_ERR, fname, line, r, |
1791 | "Failed to parse GID: '%s': %m", id); | |
a12b0cc3 LP |
1792 | |
1793 | i->gid_set = true; | |
1794 | } | |
1795 | } | |
1796 | ||
1b992147 | 1797 | h = groups; |
a12b0cc3 | 1798 | break; |
8530dc44 | 1799 | |
bce415ed RC |
1800 | default: |
1801 | return -EBADMSG; | |
1b992147 | 1802 | } |
a12b0cc3 LP |
1803 | |
1804 | i->type = action[0]; | |
1cc6c93a | 1805 | i->name = TAKE_PTR(resolved_name); |
1b992147 | 1806 | |
5bc9c980 | 1807 | existing = ordered_hashmap_get(h, i->name); |
1b992147 | 1808 | if (existing) { |
5f465fda ZJS |
1809 | /* Two functionally-equivalent items are fine */ |
1810 | r = item_equivalent(existing, i); | |
1811 | if (r < 0) | |
1812 | return r; | |
1813 | if (r == 0) | |
87c696f2 ZJS |
1814 | log_syntax(NULL, LOG_WARNING, fname, line, SYNTHETIC_ERRNO(EUCLEAN), |
1815 | "Conflict with earlier configuration for %s '%s', ignoring line.", | |
1816 | item_type_to_string(i->type), i->name); | |
1b992147 LP |
1817 | |
1818 | return 0; | |
1819 | } | |
1820 | ||
5bc9c980 | 1821 | r = ordered_hashmap_put(h, i->name, i); |
a12b0cc3 LP |
1822 | if (r < 0) |
1823 | return log_oom(); | |
1b992147 LP |
1824 | |
1825 | i = NULL; | |
1826 | return 0; | |
1827 | } | |
1828 | ||
1829 | static int read_config_file(const char *fn, bool ignore_enoent) { | |
dfc87cbf | 1830 | _cleanup_fclose_ FILE *rf = NULL; |
2708160c | 1831 | _cleanup_free_ char *pp = NULL; |
dfc87cbf | 1832 | FILE *f = NULL; |
1b992147 | 1833 | unsigned v = 0; |
c4640902 | 1834 | int r = 0; |
1b992147 LP |
1835 | |
1836 | assert(fn); | |
1837 | ||
dfc87cbf LP |
1838 | if (streq(fn, "-")) |
1839 | f = stdin; | |
1840 | else { | |
2708160c | 1841 | r = search_and_fopen(fn, "re", arg_root, (const char**) CONF_PATHS_STRV("sysusers.d"), &rf, &pp); |
dfc87cbf LP |
1842 | if (r < 0) { |
1843 | if (ignore_enoent && r == -ENOENT) | |
1844 | return 0; | |
1b992147 | 1845 | |
8d3d7072 | 1846 | return log_error_errno(r, "Failed to open '%s', ignoring: %m", fn); |
dfc87cbf LP |
1847 | } |
1848 | ||
1849 | f = rf; | |
2708160c | 1850 | fn = pp; |
1b992147 LP |
1851 | } |
1852 | ||
050ca299 LP |
1853 | for (;;) { |
1854 | _cleanup_free_ char *line = NULL; | |
1b992147 LP |
1855 | char *l; |
1856 | int k; | |
1857 | ||
050ca299 LP |
1858 | k = read_line(f, LONG_LINE_MAX, &line); |
1859 | if (k < 0) | |
1860 | return log_error_errno(k, "Failed to read '%s': %m", fn); | |
1861 | if (k == 0) | |
1862 | break; | |
1863 | ||
1b992147 LP |
1864 | v++; |
1865 | ||
1866 | l = strstrip(line); | |
4c701096 | 1867 | if (IN_SET(*l, 0, '#')) |
1b992147 LP |
1868 | continue; |
1869 | ||
1870 | k = parse_line(fn, v, l); | |
1871 | if (k < 0 && r == 0) | |
1872 | r = k; | |
1873 | } | |
1874 | ||
1875 | if (ferror(f)) { | |
56f64d95 | 1876 | log_error_errno(errno, "Failed to read from file %s: %m", fn); |
1b992147 LP |
1877 | if (r == 0) |
1878 | r = -EIO; | |
1879 | } | |
1880 | ||
1881 | return r; | |
1882 | } | |
1883 | ||
ec0327d6 ZJS |
1884 | static int cat_config(void) { |
1885 | _cleanup_strv_free_ char **files = NULL; | |
ec0327d6 ZJS |
1886 | int r; |
1887 | ||
a826d4f7 | 1888 | r = conf_files_list_with_replacement(arg_root, CONF_PATHS_STRV("sysusers.d"), arg_replace, &files, NULL); |
ec0327d6 ZJS |
1889 | if (r < 0) |
1890 | return r; | |
1891 | ||
384c2c32 | 1892 | pager_open(arg_pager_flags); |
dcd5c891 | 1893 | |
ec0327d6 ZJS |
1894 | return cat_files(NULL, files, 0); |
1895 | } | |
1896 | ||
37ec0fdd LP |
1897 | static int help(void) { |
1898 | _cleanup_free_ char *link = NULL; | |
1899 | int r; | |
1900 | ||
1901 | r = terminal_urlify_man("systemd-sysusers.service", "8", &link); | |
1902 | if (r < 0) | |
1903 | return log_oom(); | |
1904 | ||
1b992147 LP |
1905 | printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n" |
1906 | "Creates system user accounts.\n\n" | |
1907 | " -h --help Show this help\n" | |
1908 | " --version Show package version\n" | |
ec0327d6 | 1909 | " --cat-config Show configuration files\n" |
601185b4 | 1910 | " --root=PATH Operate on an alternate filesystem root\n" |
0c3ee127 | 1911 | " --image=PATH Operate on disk image as filesystem root\n" |
d16a1c1b | 1912 | " --replace=PATH Treat arguments as replacement for PATH\n" |
64fe1095 | 1913 | " --dry-run Just print what would be done\n" |
1b600bd5 | 1914 | " --inline Treat arguments as configuration lines\n" |
dcd5c891 | 1915 | " --no-pager Do not pipe output into a pager\n" |
bc556335 DDM |
1916 | "\nSee the %s for details.\n", |
1917 | program_invocation_short_name, | |
1918 | link); | |
37ec0fdd LP |
1919 | |
1920 | return 0; | |
1b992147 LP |
1921 | } |
1922 | ||
1923 | static int parse_argv(int argc, char *argv[]) { | |
1924 | ||
1925 | enum { | |
1926 | ARG_VERSION = 0x100, | |
ec0327d6 | 1927 | ARG_CAT_CONFIG, |
1b992147 | 1928 | ARG_ROOT, |
0c3ee127 | 1929 | ARG_IMAGE, |
d16a1c1b | 1930 | ARG_REPLACE, |
64fe1095 | 1931 | ARG_DRY_RUN, |
1b600bd5 | 1932 | ARG_INLINE, |
dcd5c891 | 1933 | ARG_NO_PAGER, |
1b992147 LP |
1934 | }; |
1935 | ||
1936 | static const struct option options[] = { | |
ec0327d6 ZJS |
1937 | { "help", no_argument, NULL, 'h' }, |
1938 | { "version", no_argument, NULL, ARG_VERSION }, | |
1939 | { "cat-config", no_argument, NULL, ARG_CAT_CONFIG }, | |
1940 | { "root", required_argument, NULL, ARG_ROOT }, | |
64fe1095 | 1941 | { "image", required_argument, NULL, ARG_IMAGE }, |
ec0327d6 | 1942 | { "replace", required_argument, NULL, ARG_REPLACE }, |
64fe1095 | 1943 | { "dry-run", no_argument, NULL, ARG_DRY_RUN }, |
ec0327d6 | 1944 | { "inline", no_argument, NULL, ARG_INLINE }, |
dcd5c891 | 1945 | { "no-pager", no_argument, NULL, ARG_NO_PAGER }, |
1b992147 LP |
1946 | {} |
1947 | }; | |
1948 | ||
0f474365 | 1949 | int c, r; |
1b992147 LP |
1950 | |
1951 | assert(argc >= 0); | |
1952 | assert(argv); | |
1953 | ||
601185b4 | 1954 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) |
1b992147 LP |
1955 | |
1956 | switch (c) { | |
1957 | ||
1958 | case 'h': | |
37ec0fdd | 1959 | return help(); |
1b992147 LP |
1960 | |
1961 | case ARG_VERSION: | |
3f6fd1ba | 1962 | return version(); |
1b992147 | 1963 | |
ec0327d6 ZJS |
1964 | case ARG_CAT_CONFIG: |
1965 | arg_cat_config = true; | |
1966 | break; | |
1967 | ||
1b992147 | 1968 | case ARG_ROOT: |
614b022c | 1969 | r = parse_path_argument(optarg, /* suppress_root= */ false, &arg_root); |
0f474365 | 1970 | if (r < 0) |
0f03c2a4 | 1971 | return r; |
1b992147 LP |
1972 | break; |
1973 | ||
0c3ee127 | 1974 | case ARG_IMAGE: |
3537577c ZJS |
1975 | #ifdef STANDALONE |
1976 | return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), | |
1977 | "This systemd-sysusers version is compiled without support for --image=."); | |
1978 | #else | |
614b022c | 1979 | r = parse_path_argument(optarg, /* suppress_root= */ false, &arg_image); |
0c3ee127 LP |
1980 | if (r < 0) |
1981 | return r; | |
1982 | break; | |
3537577c | 1983 | #endif |
0c3ee127 | 1984 | |
d16a1c1b ZJS |
1985 | case ARG_REPLACE: |
1986 | if (!path_is_absolute(optarg) || | |
baaa35ad ZJS |
1987 | !endswith(optarg, ".conf")) |
1988 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
1989 | "The argument to --replace= must an absolute path to a config file"); | |
d16a1c1b ZJS |
1990 | |
1991 | arg_replace = optarg; | |
1992 | break; | |
1993 | ||
64fe1095 ZJS |
1994 | case ARG_DRY_RUN: |
1995 | arg_dry_run = true; | |
1996 | break; | |
1997 | ||
1b600bd5 ZJS |
1998 | case ARG_INLINE: |
1999 | arg_inline = true; | |
2000 | break; | |
2001 | ||
dcd5c891 | 2002 | case ARG_NO_PAGER: |
0221d68a | 2003 | arg_pager_flags |= PAGER_DISABLE; |
dcd5c891 LP |
2004 | break; |
2005 | ||
1b992147 LP |
2006 | case '?': |
2007 | return -EINVAL; | |
2008 | ||
2009 | default: | |
04499a70 | 2010 | assert_not_reached(); |
1b992147 | 2011 | } |
1b992147 | 2012 | |
baaa35ad ZJS |
2013 | if (arg_replace && arg_cat_config) |
2014 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
2015 | "Option --replace= is not supported with --cat-config"); | |
ec0327d6 | 2016 | |
baaa35ad ZJS |
2017 | if (arg_replace && optind >= argc) |
2018 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
2019 | "When --replace= is given, some configuration items must be specified"); | |
d16a1c1b | 2020 | |
0c3ee127 LP |
2021 | if (arg_image && arg_root) |
2022 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Please specify either --root= or --image=, the combination of both is not supported."); | |
2023 | ||
1b992147 LP |
2024 | return 1; |
2025 | } | |
2026 | ||
d16a1c1b | 2027 | static int parse_arguments(char **args) { |
d16a1c1b ZJS |
2028 | unsigned pos = 1; |
2029 | int r; | |
2030 | ||
2031 | STRV_FOREACH(arg, args) { | |
2032 | if (arg_inline) | |
2033 | /* Use (argument):n, where n==1 for the first positional arg */ | |
2034 | r = parse_line("(argument)", pos, *arg); | |
2035 | else | |
3acb6ede | 2036 | r = read_config_file(*arg, /* ignore_enoent= */ false); |
d16a1c1b ZJS |
2037 | if (r < 0) |
2038 | return r; | |
2039 | ||
2040 | pos++; | |
2041 | } | |
2042 | ||
2043 | return 0; | |
2044 | } | |
2045 | ||
ec0327d6 | 2046 | static int read_config_files(char **args) { |
d16a1c1b ZJS |
2047 | _cleanup_strv_free_ char **files = NULL; |
2048 | _cleanup_free_ char *p = NULL; | |
d16a1c1b ZJS |
2049 | int r; |
2050 | ||
a826d4f7 | 2051 | r = conf_files_list_with_replacement(arg_root, CONF_PATHS_STRV("sysusers.d"), arg_replace, &files, &p); |
d16a1c1b | 2052 | if (r < 0) |
ec0327d6 | 2053 | return r; |
d16a1c1b ZJS |
2054 | |
2055 | STRV_FOREACH(f, files) | |
2056 | if (p && path_equal(*f, p)) { | |
28e5e1e9 | 2057 | log_debug("Parsing arguments at position \"%s\"%s", *f, special_glyph(SPECIAL_GLYPH_ELLIPSIS)); |
d16a1c1b ZJS |
2058 | |
2059 | r = parse_arguments(args); | |
2060 | if (r < 0) | |
2061 | return r; | |
2062 | } else { | |
28e5e1e9 | 2063 | log_debug("Reading config file \"%s\"%s", *f, special_glyph(SPECIAL_GLYPH_ELLIPSIS)); |
d16a1c1b ZJS |
2064 | |
2065 | /* Just warn, ignore result otherwise */ | |
3acb6ede | 2066 | (void) read_config_file(*f, /* ignore_enoent= */ true); |
d16a1c1b ZJS |
2067 | } |
2068 | ||
2069 | return 0; | |
2070 | } | |
2071 | ||
3acb6ede LP |
2072 | static int read_credential_lines(void) { |
2073 | _cleanup_free_ char *j = NULL; | |
2074 | const char *d; | |
2075 | int r; | |
2076 | ||
2077 | r = get_credentials_dir(&d); | |
2078 | if (r == -ENXIO) | |
2079 | return 0; | |
2080 | if (r < 0) | |
2081 | return log_error_errno(r, "Failed to get credentials directory: %m"); | |
2082 | ||
2083 | j = path_join(d, "sysusers.extra"); | |
2084 | if (!j) | |
2085 | return log_oom(); | |
2086 | ||
2087 | (void) read_config_file(j, /* ignore_enoent= */ true); | |
2088 | return 0; | |
2089 | } | |
2090 | ||
71da1673 | 2091 | static int run(int argc, char *argv[]) { |
3537577c | 2092 | #ifndef STANDALONE |
0c3ee127 | 2093 | _cleanup_(loop_device_unrefp) LoopDevice *loop_device = NULL; |
0c3ee127 | 2094 | _cleanup_(umount_and_rmdir_and_freep) char *unlink_dir = NULL; |
3537577c | 2095 | #endif |
5bb1d7fb | 2096 | _cleanup_close_ int lock = -EBADF; |
1b992147 | 2097 | Item *i; |
dd2fd972 | 2098 | int r; |
1b992147 LP |
2099 | |
2100 | r = parse_argv(argc, argv); | |
2101 | if (r <= 0) | |
71da1673 | 2102 | return r; |
1b992147 | 2103 | |
d2acb93d | 2104 | log_setup(); |
1b992147 | 2105 | |
71da1673 YW |
2106 | if (arg_cat_config) |
2107 | return cat_config(); | |
ec0327d6 | 2108 | |
1b992147 LP |
2109 | umask(0022); |
2110 | ||
c3dacc8b | 2111 | r = mac_selinux_init(); |
71da1673 | 2112 | if (r < 0) |
a9ba0e32 | 2113 | return r; |
1b992147 | 2114 | |
3537577c | 2115 | #ifndef STANDALONE |
0c3ee127 LP |
2116 | if (arg_image) { |
2117 | assert(!arg_root); | |
2118 | ||
2119 | r = mount_image_privately_interactively( | |
2120 | arg_image, | |
4b5de5dd LP |
2121 | DISSECT_IMAGE_GENERIC_ROOT | |
2122 | DISSECT_IMAGE_REQUIRE_ROOT | | |
2123 | DISSECT_IMAGE_VALIDATE_OS | | |
2124 | DISSECT_IMAGE_RELAX_VAR_CHECK | | |
c65f854a LP |
2125 | DISSECT_IMAGE_FSCK | |
2126 | DISSECT_IMAGE_GROWFS, | |
0c3ee127 | 2127 | &unlink_dir, |
e330f97a | 2128 | &loop_device); |
0c3ee127 LP |
2129 | if (r < 0) |
2130 | return r; | |
2131 | ||
2132 | arg_root = strdup(unlink_dir); | |
2133 | if (!arg_root) | |
2134 | return log_oom(); | |
2135 | } | |
3537577c ZJS |
2136 | #else |
2137 | assert(!arg_image); | |
2138 | #endif | |
0c3ee127 | 2139 | |
3acb6ede LP |
2140 | /* If command line arguments are specified along with --replace, read all configuration files and |
2141 | * insert the positional arguments at the specified place. Otherwise, if command line arguments are | |
2142 | * specified, execute just them, and finally, without --replace= or any positional arguments, just | |
2143 | * read configuration and execute it. */ | |
d16a1c1b | 2144 | if (arg_replace || optind >= argc) |
ec0327d6 | 2145 | r = read_config_files(argv + optind); |
d16a1c1b ZJS |
2146 | else |
2147 | r = parse_arguments(argv + optind); | |
2148 | if (r < 0) | |
71da1673 | 2149 | return r; |
1b992147 | 2150 | |
3acb6ede LP |
2151 | r = read_credential_lines(); |
2152 | if (r < 0) | |
2153 | return r; | |
2154 | ||
2155 | /* Let's tell nss-systemd not to synthesize the "root" and "nobody" entries for it, so that our | |
2156 | * detection whether the names or UID/GID area already used otherwise doesn't get confused. After | |
2157 | * all, even though nss-systemd synthesizes these users/groups, they should still appear in | |
2158 | * /etc/passwd and /etc/group, as the synthesizing logic is merely supposed to be fallback for cases | |
2159 | * where we run with a completely unpopulated /etc. */ | |
71da1673 YW |
2160 | if (setenv("SYSTEMD_NSS_BYPASS_SYNTHETIC", "1", 1) < 0) |
2161 | return log_error_errno(errno, "Failed to set SYSTEMD_NSS_BYPASS_SYNTHETIC environment variable: %m"); | |
fe102d6a | 2162 | |
8530dc44 | 2163 | if (!uid_range) { |
aa25270c | 2164 | /* Default to default range of SYSTEMD_UID_MIN..SYSTEM_UID_MAX. */ |
4b6f9b20 | 2165 | r = read_login_defs(&login_defs, NULL, arg_root); |
71da1673 | 2166 | if (r < 0) |
aa25270c ZJS |
2167 | return log_error_errno(r, "Failed to read %s%s: %m", |
2168 | strempty(arg_root), "/etc/login.defs"); | |
2169 | ||
4b6f9b20 ZJS |
2170 | login_defs_need_warning = true; |
2171 | ||
aa25270c | 2172 | /* We pick a range that very conservative: we look at compiled-in maximum and the value in |
3f316701 | 2173 | * /etc/login.defs. That way the UIDs/GIDs which we allocate will be interpreted correctly, |
aa25270c ZJS |
2174 | * even if /etc/login.defs is removed later. (The bottom bound doesn't matter much, since |
2175 | * it's only used during allocation, so we use the configured value directly). */ | |
4b6f9b20 ZJS |
2176 | uid_t begin = login_defs.system_alloc_uid_min, |
2177 | end = MIN3((uid_t) SYSTEM_UID_MAX, login_defs.system_uid_max, login_defs.system_gid_max); | |
aa25270c | 2178 | if (begin < end) { |
8dcc66ce | 2179 | r = uid_range_add(&uid_range, begin, end - begin + 1); |
aa25270c ZJS |
2180 | if (r < 0) |
2181 | return log_oom(); | |
2182 | } | |
8530dc44 LP |
2183 | } |
2184 | ||
a12b0cc3 LP |
2185 | r = add_implicit(); |
2186 | if (r < 0) | |
71da1673 | 2187 | return r; |
a12b0cc3 | 2188 | |
64fe1095 ZJS |
2189 | if (!arg_dry_run) { |
2190 | lock = take_etc_passwd_lock(arg_root); | |
2191 | if (lock < 0) | |
2192 | return log_error_errno(lock, "Failed to take /etc/passwd lock: %m"); | |
2193 | } | |
1b992147 LP |
2194 | |
2195 | r = load_user_database(); | |
71da1673 YW |
2196 | if (r < 0) |
2197 | return log_error_errno(r, "Failed to load user database: %m"); | |
1b992147 LP |
2198 | |
2199 | r = load_group_database(); | |
71da1673 YW |
2200 | if (r < 0) |
2201 | return log_error_errno(r, "Failed to read group database: %m"); | |
1b992147 | 2202 | |
90e74a66 | 2203 | ORDERED_HASHMAP_FOREACH(i, groups) |
c1a32819 | 2204 | (void) process_item(i); |
1b992147 | 2205 | |
90e74a66 | 2206 | ORDERED_HASHMAP_FOREACH(i, users) |
c1a32819 | 2207 | (void) process_item(i); |
1b992147 | 2208 | |
4c795066 | 2209 | return write_files(); |
1b992147 | 2210 | } |
71da1673 YW |
2211 | |
2212 | DEFINE_MAIN_FUNCTION(run); |