argpar: sync with upstream - adjust to iterator API
[lttng-tools.git] / src / bin / lttng / commands / remove_trigger.cpp
1 /*
2 * Copyright (C) 2021 Simon Marchi <simon.marchi@efficios.com>
3 *
4 * SPDX-License-Identifier: GPL-2.0-only
5 *
6 */
7
8 #include "../command.h"
9 #include "common/argpar/argpar.h"
10 #include "common/argpar-utils/argpar-utils.h"
11 #include "common/mi-lttng.h"
12 #include <lttng/lttng.h>
13 #include <stdio.h>
14
15 #ifdef LTTNG_EMBED_HELP
16 static const char help_msg[] =
17 #include <lttng-remove-trigger.1.h>
18 ;
19 #endif
20
21 enum {
22 OPT_HELP,
23 OPT_LIST_OPTIONS,
24 OPT_OWNER_UID,
25 };
26
27 static const
28 struct argpar_opt_descr remove_trigger_options[] = {
29 { OPT_HELP, 'h', "help", false },
30 { OPT_LIST_OPTIONS, '\0', "list-options", false },
31 { OPT_OWNER_UID, '\0', "owner-uid", true },
32 ARGPAR_OPT_DESCR_SENTINEL,
33 };
34
35 static
36 bool assign_string(char **dest, const char *src, const char *opt_name)
37 {
38 bool ret;
39
40 if (*dest) {
41 ERR("Duplicate option '%s' given.", opt_name);
42 goto error;
43 }
44
45 *dest = strdup(src);
46 if (!*dest) {
47 ERR("Failed to allocate '%s' string.", opt_name);
48 goto error;
49 }
50
51 ret = true;
52 goto end;
53
54 error:
55 ret = false;
56
57 end:
58 return ret;
59 }
60
61 int cmd_remove_trigger(int argc, const char **argv)
62 {
63 enum lttng_error_code ret_code;
64 int ret;
65 struct argpar_iter *argpar_iter = NULL;
66 const struct argpar_item *argpar_item = NULL;
67 const char *name = NULL;
68 int i;
69 struct lttng_triggers *triggers = NULL;
70 unsigned int triggers_count;
71 enum lttng_trigger_status trigger_status;
72 const struct lttng_trigger *trigger_to_remove = NULL;
73 char *owner_uid = NULL;
74 long long uid;
75 struct mi_writer *mi_writer = NULL;
76
77 if (lttng_opt_mi) {
78 mi_writer = mi_lttng_writer_create(
79 fileno(stdout), lttng_opt_mi);
80 if (!mi_writer) {
81 ret = CMD_ERROR;
82 goto error;
83 }
84
85 /* Open command element. */
86 ret = mi_lttng_writer_command_open(mi_writer,
87 mi_lttng_element_command_remove_trigger);
88 if (ret) {
89 ret = CMD_ERROR;
90 goto error;
91 }
92
93 /* Open output element. */
94 ret = mi_lttng_writer_open_element(
95 mi_writer, mi_lttng_element_command_output);
96 if (ret) {
97 ret = CMD_ERROR;
98 goto error;
99 }
100 }
101
102 argc--;
103 argv++;
104
105 argpar_iter = argpar_iter_create(argc, argv, remove_trigger_options);
106 if (!argpar_iter) {
107 ERR("Failed to allocate an argpar iter.");
108 goto error;
109 }
110
111 while (true) {
112 enum parse_next_item_status status;
113
114 status = parse_next_item(argpar_iter, &argpar_item, argv,
115 true, NULL);
116 if (status == PARSE_NEXT_ITEM_STATUS_ERROR) {
117 goto error;
118 } else if (status == PARSE_NEXT_ITEM_STATUS_END) {
119 break;
120 }
121
122 assert(status == PARSE_NEXT_ITEM_STATUS_OK);
123
124 if (argpar_item_type(argpar_item) == ARGPAR_ITEM_TYPE_OPT) {
125 const struct argpar_opt_descr *descr =
126 argpar_item_opt_descr(argpar_item);
127 const char *arg = argpar_item_opt_arg(argpar_item);
128
129 switch (descr->id) {
130 case OPT_HELP:
131 SHOW_HELP();
132 ret = 0;
133 goto end;
134 case OPT_LIST_OPTIONS:
135 list_cmd_options_argpar(stdout,
136 remove_trigger_options);
137 ret = 0;
138 goto end;
139 case OPT_OWNER_UID:
140 {
141 if (!assign_string(&owner_uid, arg,
142 "--owner-uid")) {
143 goto error;
144 }
145 break;
146 }
147 default:
148 abort();
149 }
150 } else {
151 const char *arg = argpar_item_non_opt_arg(argpar_item);
152
153 if (name) {
154 ERR("Unexpected argument '%s'", arg);
155 goto error;
156 }
157
158 name = arg;
159 }
160 }
161
162 if (!name) {
163 ERR("Missing `name` argument.");
164 goto error;
165 }
166
167 if (owner_uid) {
168 char *end;
169
170 errno = 0;
171 uid = strtol(owner_uid, &end, 10);
172 if (end == owner_uid || *end != '\0' || errno != 0) {
173 ERR("Failed to parse `%s` as an integer.", owner_uid);
174 }
175 } else {
176 uid = geteuid();
177 }
178
179 ret = lttng_list_triggers(&triggers);
180 if (ret != LTTNG_OK) {
181 ERR("Failed to get the list of triggers.");
182 goto error;
183 }
184
185 trigger_status = lttng_triggers_get_count(triggers, &triggers_count);
186 LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK);
187
188 for (i = 0; i < triggers_count; i++) {
189 const struct lttng_trigger *trigger;
190 const char *trigger_name;
191 uid_t trigger_uid;
192
193 trigger = lttng_triggers_get_at_index(triggers, i);
194 trigger_status = lttng_trigger_get_name(trigger, &trigger_name);
195 switch (trigger_status) {
196 case LTTNG_TRIGGER_STATUS_OK:
197 break;
198 case LTTNG_TRIGGER_STATUS_UNSET:
199 /* Don't compare against anonymous triggers. */
200 continue;
201 default:
202 abort();
203 }
204
205 trigger_status = lttng_trigger_get_owner_uid(
206 trigger, &trigger_uid);
207 LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK);
208
209 if (trigger_uid == uid && strcmp(trigger_name, name) == 0) {
210 trigger_to_remove = trigger;
211 break;
212 }
213 }
214
215 if (!trigger_to_remove) {
216 ERR("Couldn't find trigger with name `%s`.", name);
217 goto error;
218 }
219
220 ret = lttng_unregister_trigger(trigger_to_remove);
221 if (ret != 0) {
222 ERR("Failed to unregister trigger `%s`.", name);
223 goto error;
224 }
225
226 if (lttng_opt_mi) {
227 ret_code = lttng_trigger_mi_serialize(
228 trigger_to_remove, mi_writer, NULL);
229 if (ret_code != LTTNG_OK) {
230 goto error;
231 }
232 }
233 MSG("Removed trigger `%s`.", name);
234
235 ret = 0;
236 goto end;
237
238 error:
239 ret = 1;
240
241 end:
242 /* Mi closing. */
243 if (lttng_opt_mi && mi_writer) {
244 /* Close output element. */
245 int mi_ret = mi_lttng_writer_close_element(mi_writer);
246 if (mi_ret) {
247 ret = 1;
248 goto cleanup;
249 }
250
251 mi_ret = mi_lttng_writer_write_element_bool(mi_writer,
252 mi_lttng_element_command_success, ret ? 0 : 1);
253 if (mi_ret) {
254 ret = 1;
255 goto cleanup;
256 }
257
258 /* Command element close. */
259 mi_ret = mi_lttng_writer_command_close(mi_writer);
260 if (mi_ret) {
261 ret = 1;
262 goto cleanup;
263 }
264 }
265
266 cleanup:
267 argpar_item_destroy(argpar_item);
268 argpar_iter_destroy(argpar_iter);
269 lttng_triggers_destroy(triggers);
270 free(owner_uid);
271
272 if (mi_writer && mi_lttng_writer_destroy(mi_writer)) {
273 /* Preserve original error code. */
274 ret = ret ? ret : CMD_ERROR;
275 }
276 return ret;
277 }
This page took 0.036042 seconds and 5 git commands to generate.