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c39c72ee PMF |
1 | /* Copyright (C) 2009 Pierre-Marc Fournier |
2 | * | |
3 | * This library is free software; you can redistribute it and/or | |
4 | * modify it under the terms of the GNU Lesser General Public | |
5 | * License as published by the Free Software Foundation; either | |
6 | * version 2.1 of the License, or (at your option) any later version. | |
7 | * | |
8 | * This library is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * Lesser General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU Lesser General Public | |
14 | * License along with this library; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
16 | */ | |
17 | ||
872037bb PMF |
18 | #define _GNU_SOURCE |
19 | #include <stdio.h> | |
fbd8191b PMF |
20 | #include <unistd.h> |
21 | #include <getopt.h> | |
22 | #include <stdlib.h> | |
fbd8191b | 23 | #include <fcntl.h> |
ef290fca | 24 | #include <regex.h> |
fbd8191b | 25 | |
f9e5ce61 | 26 | #include "ustcomm.h" |
ae937656 PP |
27 | #include "ustcmd.h" |
28 | ||
29 | enum command { | |
30 | START_TRACE, | |
31 | STOP_TRACE, | |
32 | START, | |
33 | DESTROY, | |
34 | LIST_MARKERS, | |
35 | ENABLE_MARKER, | |
36 | DISABLE_MARKER, | |
37 | GET_ONLINE_PIDS, | |
38 | UNKNOWN | |
ef290fca | 39 | }; |
fbd8191b | 40 | |
52c51a47 | 41 | struct ust_opts { |
ae937656 | 42 | enum command cmd; |
52c51a47 | 43 | pid_t *pids; |
ef290fca PMF |
44 | char* regex; |
45 | regex_t preg; | |
46 | int regex_state; | |
52c51a47 PMF |
47 | }; |
48 | ||
fd2fb4f9 PMF |
49 | char *progname = NULL; |
50 | ||
51 | void usage(void) | |
52 | { | |
ae937656 | 53 | fprintf(stderr, "usage: %s COMMAND PIDs...\n", progname); |
fd2fb4f9 PMF |
54 | fprintf(stderr, "\nControl the tracing of a process that supports LTTng Userspace Tracing.\n\ |
55 | \n\ | |
56 | Commands:\n\ | |
57 | --start-trace\t\t\tStart tracing\n\ | |
58 | --stop-trace\t\t\tStop tracing\n\ | |
59 | --destroy-trace\t\t\tDestroy the trace\n\ | |
ae937656 PP |
60 | --enable-marker \"CHANNEL/MARKER\"\tEnable a marker\n\ |
61 | --disable-marker \"CHANNEL/MARKER\"\tDisable a marker\n\ | |
62 | --list-markers\t\t\tList the markers of the process, their\n\t\t\t\t\t state and format string\n\ | |
63 | \ | |
fd2fb4f9 PMF |
64 | "); |
65 | } | |
66 | ||
52c51a47 | 67 | int parse_opts_long(int argc, char **argv, struct ust_opts *opts) |
fbd8191b | 68 | { |
52c51a47 | 69 | int c; |
52c51a47 | 70 | |
52c51a47 | 71 | opts->pids = NULL; |
ef290fca PMF |
72 | opts->regex = NULL; |
73 | opts->regex_state = -1; | |
52c51a47 PMF |
74 | |
75 | while (1) { | |
52c51a47 PMF |
76 | int option_index = 0; |
77 | static struct option long_options[] = { | |
78 | {"start-trace", 0, 0, 1000}, | |
79 | {"stop-trace", 0, 0, 1001}, | |
80 | {"destroy-trace", 0, 0, 1002}, | |
81 | {"list-markers", 0, 0, 1004}, | |
82 | {"print-markers", 0, 0, 1005}, | |
83 | {"pid", 1, 0, 1006}, | |
84 | {"enable-marker", 1, 0, 1007}, | |
85 | {"disable-marker", 1, 0, 1008}, | |
86 | {"start", 0, 0, 1009}, | |
d373b5cd PMF |
87 | {"help", 0, 0, 'h'}, |
88 | {"version", 0, 0, 1010}, | |
ae937656 | 89 | {"online-pids", 0, 0, 1011}, |
52c51a47 PMF |
90 | {0, 0, 0, 0} |
91 | }; | |
92 | ||
d373b5cd | 93 | c = getopt_long(argc, argv, "h", long_options, &option_index); |
52c51a47 PMF |
94 | if (c == -1) |
95 | break; | |
96 | ||
97 | switch (c) { | |
98 | case 0: | |
99 | printf("option %s", long_options[option_index].name); | |
100 | if (optarg) | |
101 | printf(" with arg %s", optarg); | |
102 | printf("\n"); | |
103 | break; | |
104 | ||
105 | case 1000: | |
ae937656 | 106 | opts->cmd = START_TRACE; |
52c51a47 PMF |
107 | break; |
108 | case 1001: | |
ae937656 | 109 | opts->cmd = STOP_TRACE; |
52c51a47 PMF |
110 | break; |
111 | case 1009: | |
ae937656 | 112 | opts->cmd = START; |
52c51a47 PMF |
113 | break; |
114 | case 1002: | |
ae937656 | 115 | opts->cmd = DESTROY; |
52c51a47 PMF |
116 | break; |
117 | case 1004: | |
ae937656 | 118 | opts->cmd = LIST_MARKERS; |
52c51a47 PMF |
119 | break; |
120 | case 1007: | |
ae937656 | 121 | opts->cmd = ENABLE_MARKER; |
ef290fca | 122 | opts->regex = strdup(optarg); |
52c51a47 PMF |
123 | break; |
124 | case 1008: | |
ae937656 | 125 | opts->cmd = DISABLE_MARKER; |
ef290fca | 126 | opts->regex = strdup(optarg); |
ae937656 PP |
127 | break; |
128 | case 1011: | |
129 | opts->cmd = GET_ONLINE_PIDS; | |
52c51a47 | 130 | break; |
d373b5cd PMF |
131 | case 'h': |
132 | usage(); | |
133 | exit(0); | |
134 | case 1010: | |
ae937656 | 135 | printf("Version 0.1\n"); |
52c51a47 PMF |
136 | |
137 | default: | |
ae937656 PP |
138 | /* unknown option or other error; error is |
139 | printed by getopt, just return */ | |
140 | opts->cmd = UNKNOWN; | |
52c51a47 | 141 | return 1; |
fbd8191b PMF |
142 | } |
143 | } | |
144 | ||
772030fe | 145 | if (argc - optind > 0 && opts->cmd != GET_ONLINE_PIDS) { |
52c51a47 PMF |
146 | int i; |
147 | int pididx=0; | |
148 | opts->pids = malloc((argc-optind+1) * sizeof(pid_t)); | |
fbd8191b | 149 | |
52c51a47 PMF |
150 | for(i=optind; i<argc; i++) { |
151 | opts->pids[pididx++] = atoi(argv[i]); | |
152 | } | |
153 | opts->pids[pididx] = -1; | |
fbd8191b PMF |
154 | } |
155 | ||
772030fe PMF |
156 | if (opts->cmd == ENABLE_MARKER || opts->cmd == DISABLE_MARKER) { |
157 | if (opts->regex_state = regcomp(&opts->preg, opts->regex, 0)) { | |
158 | fprintf(stderr, "Invalid regular expression.\n"); | |
159 | } | |
160 | } | |
161 | ||
52c51a47 PMF |
162 | return 0; |
163 | } | |
fbd8191b | 164 | |
772030fe PMF |
165 | static void regex_change_m_state(struct ust_opts* opts, pid_t pid) { |
166 | struct USTcmd_cmsf* cmsf = NULL; | |
167 | unsigned int i = 0; | |
168 | int e = (opts->cmd == ENABLE_MARKER); | |
169 | ||
170 | if (opts->regex_state != 0) { | |
171 | return; | |
172 | } | |
173 | ||
174 | if (ustcmd_get_cmsf(&cmsf, pid)) { | |
175 | fprintf(stderr, "error while trying to get markers for PID " | |
176 | "%u\n", (unsigned int) pid); | |
177 | return; | |
178 | } | |
179 | while (cmsf[i].channel != NULL) { | |
180 | char* mc; | |
181 | asprintf(&mc, "%s/%s", cmsf[i].channel, cmsf[i].marker); | |
182 | if (regexec(&opts->preg, mc, 0, NULL, 0) == 0) { | |
183 | /* We got a match! */ | |
184 | if (ustcmd_set_marker_state(mc, | |
185 | e ? USTCMD_MS_ON : USTCMD_MS_OFF, pid)) { | |
186 | fprintf(stderr, | |
187 | "error while trying to %sable marker" | |
188 | "\"%s\" for PID %u\n", | |
189 | e ? "en" : "dis", mc, | |
190 | (unsigned int) pid); | |
191 | } else { | |
192 | printf("sucessfully %sabled marker " | |
193 | "\"%s\" for PID %u\n", | |
194 | e ? "en" : "dis", mc, | |
195 | (unsigned int) pid); | |
196 | } | |
197 | } | |
198 | free(mc); | |
199 | ++i; | |
200 | } | |
201 | ustcmd_free_cmsf(cmsf); | |
202 | } | |
203 | ||
fbd8191b PMF |
204 | int main(int argc, char *argv[]) |
205 | { | |
52c51a47 | 206 | pid_t *pidit; |
52c51a47 PMF |
207 | struct ustcomm_connection conn; |
208 | int result; | |
209 | struct ust_opts opts; | |
fbd8191b | 210 | |
52c51a47 | 211 | progname = argv[0]; |
fbd8191b | 212 | |
52c51a47 PMF |
213 | if(argc <= 1) { |
214 | fprintf(stderr, "No operation specified.\n"); | |
215 | usage(); | |
216 | exit(EXIT_FAILURE); | |
217 | } | |
218 | ||
219 | result = parse_opts_long(argc, argv, &opts); | |
220 | if(result) { | |
221 | usage(); | |
222 | exit(EXIT_FAILURE); | |
223 | } | |
224 | ||
ae937656 | 225 | if(opts.pids == NULL && opts.cmd != GET_ONLINE_PIDS) { |
52c51a47 PMF |
226 | fprintf(stderr, "No pid specified.\n"); |
227 | usage(); | |
228 | exit(EXIT_FAILURE); | |
229 | } | |
ae937656 | 230 | if(opts.cmd == UNKNOWN) { |
52c51a47 PMF |
231 | fprintf(stderr, "No command specified.\n"); |
232 | usage(); | |
233 | exit(EXIT_FAILURE); | |
234 | } | |
ae937656 PP |
235 | if (opts.cmd == GET_ONLINE_PIDS) { |
236 | pid_t* pp = ustcmd_get_online_pids(); | |
237 | unsigned int i = 0; | |
52c51a47 | 238 | |
ae937656 PP |
239 | if (pp) { |
240 | while (pp[i] != 0) { | |
241 | printf("%u\n", (unsigned int) pp[i]); | |
242 | ++i; | |
243 | } | |
244 | free(pp); | |
52c51a47 | 245 | } |
ef290fca | 246 | |
ae937656 PP |
247 | exit(EXIT_SUCCESS); |
248 | } | |
52c51a47 | 249 | |
ae937656 PP |
250 | pidit = opts.pids; |
251 | struct USTcmd_cmsf* cmsf = NULL; | |
ef290fca | 252 | |
ae937656 PP |
253 | while(*pidit != -1) { |
254 | switch (opts.cmd) { | |
255 | case START_TRACE: | |
256 | if (ustcmd_start_trace(*pidit)) { | |
257 | fprintf(stderr, | |
258 | "error while trying to for trace " | |
259 | "with PID %u\n", (unsigned int) *pidit); | |
260 | break; | |
261 | } | |
262 | printf("sucessfully started trace for PID %u\n", | |
263 | (unsigned int) *pidit); | |
264 | break; | |
ef290fca | 265 | |
ae937656 PP |
266 | case STOP_TRACE: |
267 | if (ustcmd_stop_trace(*pidit)) { | |
268 | fprintf(stderr, | |
269 | "error while trying to stop trace " | |
270 | "for PID %u\n", (unsigned int) *pidit); | |
271 | break; | |
272 | } | |
273 | printf("sucessfully stopped trace for PID %u\n", | |
274 | (unsigned int) *pidit); | |
275 | break; | |
ef290fca | 276 | |
ae937656 PP |
277 | case START: |
278 | if (ustcmd_setup_and_start(*pidit)) { | |
279 | fprintf(stderr, | |
280 | "error while trying to setup/start " | |
281 | "trace for PID %u\n", | |
282 | (unsigned int) *pidit); | |
283 | break; | |
284 | } | |
285 | printf("sucessfully setup/started trace for PID %u\n", | |
286 | (unsigned int) *pidit); | |
287 | break; | |
ef290fca | 288 | |
ae937656 PP |
289 | case DESTROY: |
290 | if (ustcmd_destroy_trace(*pidit)) { | |
291 | fprintf(stderr, | |
292 | "error while trying to destroy " | |
293 | "trace with PID %u\n", | |
294 | (unsigned int) *pidit); | |
295 | break; | |
296 | } | |
297 | printf("sucessfully destroyed trace for PID %u\n", | |
298 | (unsigned int) *pidit); | |
299 | break; | |
ef290fca | 300 | |
ae937656 PP |
301 | case LIST_MARKERS: |
302 | cmsf = NULL; | |
303 | if (ustcmd_get_cmsf(&cmsf, *pidit)) { | |
304 | fprintf(stderr, | |
305 | "error while trying to list markers for" | |
306 | " PID %u\n", (unsigned int) *pidit); | |
307 | break; | |
308 | } | |
309 | unsigned int i = 0; | |
310 | while (cmsf[i].channel != NULL) { | |
311 | printf("{PID: %u, channel/marker: %s/%s, " | |
312 | "state: %u, fs: %s}\n", | |
313 | (unsigned int) *pidit, | |
314 | cmsf[i].channel, | |
315 | cmsf[i].marker, | |
316 | cmsf[i].state, | |
317 | cmsf[i].fs); | |
318 | ++i; | |
319 | } | |
320 | ustcmd_free_cmsf(cmsf); | |
321 | break; | |
ef290fca | 322 | |
ae937656 | 323 | case ENABLE_MARKER: |
ae937656 | 324 | case DISABLE_MARKER: |
ef290fca | 325 | regex_change_m_state(&opts, *pidit); |
ae937656 | 326 | break; |
ef290fca | 327 | |
ae937656 PP |
328 | default: |
329 | fprintf(stderr, "error: unknown command...\n"); | |
330 | break; | |
331 | } | |
ef290fca | 332 | |
52c51a47 PMF |
333 | pidit++; |
334 | } | |
82b1a169 | 335 | |
ef290fca PMF |
336 | exit_free: |
337 | if (opts.pids != NULL) { | |
338 | free(opts.pids); | |
339 | } | |
340 | if (opts.regex != NULL) { | |
341 | free(opts.regex); | |
ae937656 | 342 | } |
fbd8191b PMF |
343 | |
344 | return 0; | |
345 | } | |
ae937656 | 346 |