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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
daf71ef6 | 2 | |
0bbd8e18 DDM |
3 | #include <unistd.h> |
4 | ||
b78d73fa | 5 | #include "alloc-util.h" |
0bbd8e18 | 6 | #include "bus-util.h" |
a01c4bc9 | 7 | #include "edit-util.h" |
0bbd8e18 DDM |
8 | #include "hashmap.h" |
9 | #include "label-util.h" | |
daf71ef6 | 10 | #include "pager.h" |
0bbd8e18 | 11 | #include "path-lookup.h" |
daf71ef6 LP |
12 | #include "path-util.h" |
13 | #include "pretty-print.h" | |
0bbd8e18 DDM |
14 | #include "string-util.h" |
15 | #include "strv.h" | |
1cf40697 | 16 | #include "systemctl.h" |
daf71ef6 LP |
17 | #include "systemctl-daemon-reload.h" |
18 | #include "systemctl-edit.h" | |
19 | #include "systemctl-util.h" | |
daf71ef6 | 20 | #include "terminal-util.h" |
0bbd8e18 | 21 | #include "unit-name.h" |
daf71ef6 | 22 | |
32baf64d | 23 | int verb_cat(int argc, char *argv[], void *userdata) { |
2962a508 | 24 | _cleanup_hashmap_free_ Hashmap *cached_id_map = NULL, *cached_name_map = NULL; |
7dfc7139 | 25 | _cleanup_(lookup_paths_done) LookupPaths lp = {}; |
daf71ef6 | 26 | _cleanup_strv_free_ char **names = NULL; |
daf71ef6 LP |
27 | sd_bus *bus; |
28 | bool first = true; | |
29 | int r, rc = 0; | |
30 | ||
31 | /* Include all units by default — i.e. continue as if the --all option was used */ | |
32 | if (strv_isempty(arg_states)) | |
33 | arg_all = true; | |
34 | ||
35 | if (arg_transport != BUS_TRANSPORT_LOCAL) | |
36 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Cannot remotely cat units."); | |
37 | ||
4870133b | 38 | r = lookup_paths_init_or_warn(&lp, arg_runtime_scope, 0, arg_root); |
daf71ef6 | 39 | if (r < 0) |
99aad9a2 | 40 | return r; |
daf71ef6 LP |
41 | |
42 | r = acquire_bus(BUS_MANAGER, &bus); | |
43 | if (r < 0) | |
44 | return r; | |
45 | ||
46 | r = expand_unit_names(bus, strv_skip(argv, 1), NULL, &names, NULL); | |
47 | if (r < 0) | |
48 | return log_error_errno(r, "Failed to expand names: %m"); | |
49 | ||
50 | r = maybe_extend_with_unit_dependencies(bus, &names); | |
51 | if (r < 0) | |
52 | return r; | |
53 | ||
384c2c32 | 54 | pager_open(arg_pager_flags); |
daf71ef6 LP |
55 | |
56 | STRV_FOREACH(name, names) { | |
57 | _cleanup_free_ char *fragment_path = NULL; | |
58 | _cleanup_strv_free_ char **dropin_paths = NULL; | |
59 | ||
2962a508 | 60 | r = unit_find_paths(bus, *name, &lp, false, &cached_id_map, &cached_name_map, &fragment_path, &dropin_paths); |
daf71ef6 LP |
61 | if (r == -ERFKILL) { |
62 | printf("%s# Unit %s is masked%s.\n", | |
63 | ansi_highlight_magenta(), | |
64 | *name, | |
65 | ansi_normal()); | |
66 | continue; | |
67 | } | |
68 | if (r == -EKEYREJECTED) { | |
69 | printf("%s# Unit %s could not be loaded.%s\n", | |
70 | ansi_highlight_magenta(), | |
71 | *name, | |
72 | ansi_normal()); | |
73 | continue; | |
74 | } | |
75 | if (r < 0) | |
76 | return r; | |
77 | if (r == 0) { | |
78 | /* Skip units which have no on-disk counterpart, but propagate the error to the | |
b498f250 IS |
79 | * user (if --force is set, eat the error, just like unit_find_paths()) */ |
80 | if (!arg_force) | |
81 | rc = -ENOENT; | |
daf71ef6 LP |
82 | continue; |
83 | } | |
84 | ||
85 | if (first) | |
86 | first = false; | |
87 | else | |
88 | puts(""); | |
89 | ||
90 | if (need_daemon_reload(bus, *name) > 0) /* ignore errors (<0), this is informational output */ | |
91 | fprintf(stderr, | |
92 | "%s# Warning: %s changed on disk, the version systemd has loaded is outdated.\n" | |
93 | "%s# This output shows the current version of the unit's original fragment and drop-in files.\n" | |
94 | "%s# If fragments or drop-ins were added or removed, they are not properly reflected in this output.\n" | |
95 | "%s# Run 'systemctl%s daemon-reload' to reload units.%s\n", | |
96 | ansi_highlight_red(), | |
97 | *name, | |
98 | ansi_highlight_red(), | |
99 | ansi_highlight_red(), | |
100 | ansi_highlight_red(), | |
4870133b | 101 | arg_runtime_scope == RUNTIME_SCOPE_SYSTEM ? "" : " --user", |
daf71ef6 LP |
102 | ansi_normal()); |
103 | ||
063c8382 | 104 | r = cat_files(fragment_path, dropin_paths, /* flags= */ CAT_FORMAT_HAS_SECTIONS); |
daf71ef6 LP |
105 | if (r < 0) |
106 | return r; | |
107 | } | |
108 | ||
109 | return rc; | |
110 | } | |
111 | ||
daf71ef6 | 112 | static int get_file_to_edit( |
90c462bd | 113 | const LookupPaths *lp, |
daf71ef6 LP |
114 | const char *name, |
115 | char **ret_path) { | |
116 | ||
90c462bd | 117 | _cleanup_free_ char *path = NULL; |
daf71ef6 | 118 | |
90c462bd | 119 | assert(lp); |
daf71ef6 LP |
120 | assert(name); |
121 | assert(ret_path); | |
122 | ||
90c462bd | 123 | path = path_join(lp->persistent_config, name); |
daf71ef6 LP |
124 | if (!path) |
125 | return log_oom(); | |
126 | ||
127 | if (arg_runtime) { | |
90c462bd MY |
128 | _cleanup_free_ char *run = NULL; |
129 | ||
130 | run = path_join(lp->runtime_config, name); | |
daf71ef6 LP |
131 | if (!run) |
132 | return log_oom(); | |
daf71ef6 | 133 | |
daf71ef6 LP |
134 | if (access(path, F_OK) >= 0) |
135 | return log_error_errno(SYNTHETIC_ERRNO(EEXIST), | |
136 | "Refusing to create \"%s\" because it would be overridden by \"%s\" anyway.", | |
137 | run, path); | |
138 | ||
139 | *ret_path = TAKE_PTR(run); | |
140 | } else | |
141 | *ret_path = TAKE_PTR(path); | |
142 | ||
143 | return 0; | |
144 | } | |
145 | ||
146 | static int unit_file_create_new( | |
9a11b4f9 | 147 | EditFileContext *context, |
90c462bd | 148 | const LookupPaths *lp, |
daf71ef6 LP |
149 | const char *unit_name, |
150 | const char *suffix, | |
9a11b4f9 | 151 | char * const *original_unit_paths) { |
daf71ef6 | 152 | |
90c462bd | 153 | _cleanup_free_ char *unit = NULL, *new_path = NULL; |
daf71ef6 LP |
154 | int r; |
155 | ||
9a11b4f9 | 156 | assert(context); |
90c462bd | 157 | assert(lp); |
daf71ef6 | 158 | assert(unit_name); |
daf71ef6 | 159 | |
90c462bd MY |
160 | unit = strjoin(unit_name, suffix); |
161 | if (!unit) | |
162 | return log_oom(); | |
163 | ||
164 | r = get_file_to_edit(lp, unit, &new_path); | |
daf71ef6 LP |
165 | if (r < 0) |
166 | return r; | |
167 | ||
7a2a7f2c | 168 | return edit_files_add(context, new_path, NULL, original_unit_paths); |
daf71ef6 LP |
169 | } |
170 | ||
171 | static int unit_file_create_copy( | |
9a11b4f9 | 172 | EditFileContext *context, |
90c462bd | 173 | const LookupPaths *lp, |
daf71ef6 | 174 | const char *unit_name, |
9a11b4f9 | 175 | const char *fragment_path) { |
daf71ef6 | 176 | |
9a11b4f9 | 177 | _cleanup_free_ char *new_path = NULL; |
daf71ef6 LP |
178 | int r; |
179 | ||
9a11b4f9 | 180 | assert(context); |
90c462bd | 181 | assert(lp); |
daf71ef6 LP |
182 | assert(fragment_path); |
183 | assert(unit_name); | |
daf71ef6 | 184 | |
90c462bd | 185 | r = get_file_to_edit(lp, unit_name, &new_path); |
daf71ef6 LP |
186 | if (r < 0) |
187 | return r; | |
188 | ||
189 | if (!path_equal(fragment_path, new_path) && access(new_path, F_OK) >= 0) { | |
190 | char response; | |
191 | ||
192 | r = ask_char(&response, "yn", "\"%s\" already exists. Overwrite with \"%s\"? [(y)es, (n)o] ", new_path, fragment_path); | |
193 | if (r < 0) | |
194 | return r; | |
90c462bd | 195 | |
daf71ef6 LP |
196 | if (response != 'y') |
197 | return log_warning_errno(SYNTHETIC_ERRNO(EKEYREJECTED), "%s skipped.", unit_name); | |
198 | } | |
199 | ||
7a2a7f2c | 200 | return edit_files_add(context, new_path, fragment_path, NULL); |
daf71ef6 LP |
201 | } |
202 | ||
1ae886fe LP |
203 | static int find_paths_to_edit( |
204 | sd_bus *bus, | |
9a11b4f9 MY |
205 | EditFileContext *context, |
206 | char **names) { | |
1ae886fe | 207 | |
2962a508 | 208 | _cleanup_hashmap_free_ Hashmap *cached_id_map = NULL, *cached_name_map = NULL; |
7dfc7139 | 209 | _cleanup_(lookup_paths_done) LookupPaths lp = {}; |
f206809b MY |
210 | _cleanup_free_ char *drop_in_alloc = NULL, *suffix = NULL; |
211 | const char *drop_in; | |
daf71ef6 LP |
212 | int r; |
213 | ||
9a11b4f9 MY |
214 | assert(bus); |
215 | assert(context); | |
daf71ef6 | 216 | assert(names); |
daf71ef6 | 217 | |
f206809b MY |
218 | if (isempty(arg_drop_in)) |
219 | drop_in = "override.conf"; | |
220 | else if (!endswith(arg_drop_in, ".conf")) { | |
221 | drop_in_alloc = strjoin(arg_drop_in, ".conf"); | |
222 | if (!drop_in_alloc) | |
223 | return log_oom(); | |
224 | ||
225 | drop_in = drop_in_alloc; | |
226 | } else | |
227 | drop_in = arg_drop_in; | |
228 | ||
229 | if (!filename_is_valid(drop_in)) | |
230 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid drop-in file name '%s'.", drop_in); | |
231 | ||
232 | suffix = strjoin(".d/", drop_in); | |
233 | if (!suffix) | |
234 | return log_oom(); | |
235 | ||
4870133b | 236 | r = lookup_paths_init(&lp, arg_runtime_scope, 0, arg_root); |
daf71ef6 LP |
237 | if (r < 0) |
238 | return r; | |
239 | ||
240 | STRV_FOREACH(name, names) { | |
fe5cb7a7 | 241 | _cleanup_free_ char *path = NULL; |
85c5d313 | 242 | _cleanup_strv_free_ char **unit_paths = NULL; |
daf71ef6 | 243 | |
2962a508 | 244 | r = unit_find_paths(bus, *name, &lp, /* force_client_side= */ false, &cached_id_map, &cached_name_map, &path, &unit_paths); |
daf71ef6 LP |
245 | if (r == -EKEYREJECTED) { |
246 | /* If loading of the unit failed server side complete, then the server won't tell us | |
247 | * the unit file path. In that case, find the file client side. */ | |
90c462bd | 248 | |
daf71ef6 | 249 | log_debug_errno(r, "Unit '%s' was not loaded correctly, retrying client-side.", *name); |
2962a508 | 250 | r = unit_find_paths(bus, *name, &lp, /* force_client_side= */ true, &cached_id_map, &cached_name_map, &path, &unit_paths); |
daf71ef6 LP |
251 | } |
252 | if (r == -ERFKILL) | |
253 | return log_error_errno(r, "Unit '%s' masked, cannot edit.", *name); | |
254 | if (r < 0) | |
90c462bd | 255 | return r; /* Already logged by unit_find_paths() */ |
daf71ef6 | 256 | |
98199724 | 257 | if (!path) { |
8451e720 FS |
258 | if (!arg_force) |
259 | return log_info_errno(SYNTHETIC_ERRNO(ENOENT), | |
260 | "Run 'systemctl edit%s --force --full %s' to create a new unit.", | |
261 | arg_runtime_scope == RUNTIME_SCOPE_GLOBAL ? " --global" : | |
262 | arg_runtime_scope == RUNTIME_SCOPE_USER ? " --user" : "", | |
263 | *name); | |
daf71ef6 LP |
264 | |
265 | /* Create a new unit from scratch */ | |
1ae886fe | 266 | r = unit_file_create_new( |
9a11b4f9 | 267 | context, |
1ae886fe LP |
268 | &lp, |
269 | *name, | |
f206809b | 270 | arg_full ? NULL : suffix, |
9a11b4f9 | 271 | NULL); |
daf71ef6 | 272 | } else { |
d88e1e48 LP |
273 | _cleanup_free_ char *unit_name = NULL; |
274 | ||
275 | r = path_extract_filename(path, &unit_name); | |
276 | if (r < 0) | |
277 | return log_error_errno(r, "Failed to extract unit name from path '%s': %m", path); | |
278 | ||
daf71ef6 LP |
279 | /* We follow unit aliases, but we need to propagate the instance */ |
280 | if (unit_name_is_valid(*name, UNIT_NAME_INSTANCE) && | |
281 | unit_name_is_valid(unit_name, UNIT_NAME_TEMPLATE)) { | |
fe5cb7a7 | 282 | _cleanup_free_ char *instance = NULL, *tmp_name = NULL; |
daf71ef6 LP |
283 | |
284 | r = unit_name_to_instance(*name, &instance); | |
285 | if (r < 0) | |
286 | return r; | |
287 | ||
288 | r = unit_name_replace_instance(unit_name, instance, &tmp_name); | |
289 | if (r < 0) | |
290 | return r; | |
291 | ||
fe5cb7a7 | 292 | free_and_replace(unit_name, tmp_name); |
daf71ef6 LP |
293 | } |
294 | ||
295 | if (arg_full) | |
1ae886fe | 296 | r = unit_file_create_copy( |
9a11b4f9 | 297 | context, |
1ae886fe LP |
298 | &lp, |
299 | unit_name, | |
9a11b4f9 | 300 | path); |
85c5d313 | 301 | else { |
302 | r = strv_prepend(&unit_paths, path); | |
303 | if (r < 0) | |
304 | return log_oom(); | |
305 | ||
1ae886fe | 306 | r = unit_file_create_new( |
9a11b4f9 | 307 | context, |
1ae886fe LP |
308 | &lp, |
309 | unit_name, | |
f206809b | 310 | suffix, |
9a11b4f9 | 311 | unit_paths); |
85c5d313 | 312 | } |
daf71ef6 LP |
313 | } |
314 | if (r < 0) | |
315 | return r; | |
daf71ef6 LP |
316 | } |
317 | ||
318 | return 0; | |
319 | } | |
320 | ||
32baf64d | 321 | int verb_edit(int argc, char *argv[], void *userdata) { |
9a11b4f9 | 322 | _cleanup_(edit_file_context_done) EditFileContext context = { |
6e5d0e31 MY |
323 | .marker_start = DROPIN_MARKER_START, |
324 | .marker_end = DROPIN_MARKER_END, | |
9a11b4f9 | 325 | .remove_parent = !arg_full, |
bc6c7a58 | 326 | .overwrite_with_origin = true, |
79f0e94e | 327 | .read_from_stdin = arg_stdin, |
9a11b4f9 | 328 | }; |
daf71ef6 | 329 | _cleanup_strv_free_ char **names = NULL; |
daf71ef6 LP |
330 | sd_bus *bus; |
331 | int r; | |
332 | ||
329050c5 | 333 | if (!on_tty() && !arg_stdin) |
119cba78 | 334 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Cannot edit units interactively if not on a tty."); |
daf71ef6 LP |
335 | |
336 | if (arg_transport != BUS_TRANSPORT_LOCAL) | |
337 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Cannot edit units remotely."); | |
338 | ||
a452c807 | 339 | r = mac_init(); |
daf71ef6 LP |
340 | if (r < 0) |
341 | return r; | |
342 | ||
343 | r = acquire_bus(BUS_MANAGER, &bus); | |
344 | if (r < 0) | |
345 | return r; | |
346 | ||
347 | r = expand_unit_names(bus, strv_skip(argv, 1), NULL, &names, NULL); | |
348 | if (r < 0) | |
349 | return log_error_errno(r, "Failed to expand names: %m"); | |
ffcd6838 ZJS |
350 | if (strv_isempty(names)) |
351 | return log_error_errno(SYNTHETIC_ERRNO(ENOENT), "No units matched the specified patterns."); | |
daf71ef6 | 352 | |
329050c5 ZJS |
353 | if (arg_stdin && arg_full && strv_length(names) != 1) |
354 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
355 | "With 'edit --stdin --full', exactly one unit for editing must be specified."); | |
356 | ||
daf71ef6 | 357 | STRV_FOREACH(tmp, names) { |
6ea32f61 | 358 | r = unit_is_masked(bus, *tmp); |
b58b00e4 YW |
359 | if (r < 0 && r != -ENOENT) |
360 | return log_error_errno(r, "Failed to check if unit %s is masked: %m", *tmp); | |
daf71ef6 LP |
361 | if (r > 0) |
362 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Cannot edit %s: unit is masked.", *tmp); | |
363 | } | |
364 | ||
9a11b4f9 | 365 | r = find_paths_to_edit(bus, &context, names); |
daf71ef6 LP |
366 | if (r < 0) |
367 | return r; | |
daf71ef6 | 368 | |
9a11b4f9 | 369 | r = do_edit_files_and_install(&context); |
daf71ef6 | 370 | if (r < 0) |
9a11b4f9 | 371 | return r; |
daf71ef6 | 372 | |
623461c1 LP |
373 | if (!arg_no_reload && !install_client_side()) { |
374 | r = daemon_reload(ACTION_RELOAD, /* graceful= */ false); | |
321291d8 YW |
375 | if (r < 0) |
376 | return r; | |
623461c1 | 377 | } |
daf71ef6 | 378 | |
321291d8 | 379 | return 0; |
daf71ef6 | 380 | } |