Commit | Line | Data |
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f3ed775e DG |
1 | /* |
2 | * Copyright (c) 2011 David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License, version 2 only, | |
6 | * as published by the Free Software Foundation. | |
f3ed775e DG |
7 | * |
8 | * This program 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 | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along | |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
6c1c0768 | 18 | #define _LGPL_SOURCE |
b9dfb167 | 19 | #include <assert.h> |
f3ed775e | 20 | #include <stdlib.h> |
679b4943 | 21 | #include <ctype.h> |
3badf2bf | 22 | #include <limits.h> |
8960e9cd DG |
23 | #include <sys/types.h> |
24 | #include <sys/socket.h> | |
25 | #include <signal.h> | |
26 | #include <netinet/in.h> | |
27 | #include <arpa/inet.h> | |
f3ed775e | 28 | |
db758600 | 29 | #include <common/error.h> |
feb0f3e5 | 30 | #include <common/utils.h> |
f3ed775e | 31 | |
beb8c75a | 32 | #include "conf.h" |
679b4943 | 33 | #include "utils.h" |
3c9bd23c | 34 | #include "command.h" |
f3ed775e | 35 | |
b9dfb167 DG |
36 | static const char *str_kernel = "Kernel"; |
37 | static const char *str_ust = "UST"; | |
38 | static const char *str_jul = "JUL"; | |
5cdb6027 | 39 | static const char *str_log4j = "LOG4J"; |
0e115563 | 40 | static const char *str_python = "Python"; |
b9dfb167 | 41 | |
1dac0189 PPM |
42 | static |
43 | char *_get_session_name(int quiet) | |
f3ed775e DG |
44 | { |
45 | char *path, *session_name = NULL; | |
46 | ||
47 | /* Get path to config file */ | |
feb0f3e5 | 48 | path = utils_get_home_dir(); |
f3ed775e DG |
49 | if (path == NULL) { |
50 | goto error; | |
51 | } | |
52 | ||
53 | /* Get session name from config */ | |
1dac0189 PPM |
54 | session_name = quiet ? config_read_session_name_quiet(path) : |
55 | config_read_session_name(path); | |
f3ed775e | 56 | if (session_name == NULL) { |
58a97671 | 57 | goto error; |
f3ed775e DG |
58 | } |
59 | ||
3183dbb0 | 60 | DBG2("Config file path found: %s", path); |
cd80958d | 61 | DBG("Session name found: %s", session_name); |
f3ed775e | 62 | return session_name; |
3183dbb0 DG |
63 | |
64 | error: | |
65 | return NULL; | |
f3ed775e | 66 | } |
679b4943 | 67 | |
1dac0189 PPM |
68 | /* |
69 | * get_session_name | |
70 | * | |
71 | * Return allocated string with the session name found in the config | |
72 | * directory. | |
73 | */ | |
74 | char *get_session_name(void) | |
75 | { | |
76 | return _get_session_name(0); | |
77 | } | |
78 | ||
79 | /* | |
80 | * get_session_name_quiet (no warnings/errors emitted) | |
81 | * | |
82 | * Return allocated string with the session name found in the config | |
83 | * directory. | |
84 | */ | |
85 | char *get_session_name_quiet(void) | |
86 | { | |
87 | return _get_session_name(1); | |
88 | } | |
89 | ||
3c9bd23c SM |
90 | /* |
91 | * list_commands | |
92 | * | |
93 | * List commands line by line. This is mostly for bash auto completion and to | |
94 | * avoid difficult parsing. | |
95 | */ | |
96 | void list_commands(struct cmd_struct *commands, FILE *ofp) | |
97 | { | |
98 | int i = 0; | |
99 | struct cmd_struct *cmd = NULL; | |
100 | ||
101 | cmd = &commands[i]; | |
102 | while (cmd->name != NULL) { | |
103 | fprintf(ofp, "%s\n", cmd->name); | |
104 | i++; | |
105 | cmd = &commands[i]; | |
106 | } | |
107 | } | |
679b4943 SM |
108 | |
109 | /* | |
110 | * list_cmd_options | |
111 | * | |
112 | * Prints a simple list of the options available to a command. This is intended | |
113 | * to be easily parsed for bash completion. | |
114 | */ | |
115 | void list_cmd_options(FILE *ofp, struct poptOption *options) | |
116 | { | |
117 | int i; | |
118 | struct poptOption *option = NULL; | |
119 | ||
120 | for (i = 0; options[i].longName != NULL; i++) { | |
121 | option = &options[i]; | |
122 | ||
123 | fprintf(ofp, "--%s\n", option->longName); | |
124 | ||
125 | if (isprint(option->shortName)) { | |
126 | fprintf(ofp, "-%c\n", option->shortName); | |
127 | } | |
128 | } | |
129 | } | |
8ce58bad MD |
130 | |
131 | /* | |
132 | * fls: returns the position of the most significant bit. | |
133 | * Returns 0 if no bit is set, else returns the position of the most | |
134 | * significant bit (from 1 to 32 on 32-bit, from 1 to 64 on 64-bit). | |
135 | */ | |
136 | #if defined(__i386) || defined(__x86_64) | |
137 | static inline | |
138 | unsigned int fls_u32(uint32_t x) | |
139 | { | |
140 | int r; | |
141 | ||
142 | asm("bsrl %1,%0\n\t" | |
143 | "jnz 1f\n\t" | |
144 | "movl $-1,%0\n\t" | |
145 | "1:\n\t" | |
146 | : "=r" (r) : "rm" (x)); | |
147 | return r + 1; | |
148 | } | |
149 | #define HAS_FLS_U32 | |
150 | #endif | |
151 | ||
152 | #if defined(__x86_64) | |
153 | static inline | |
154 | unsigned int fls_u64(uint64_t x) | |
155 | { | |
156 | long r; | |
157 | ||
158 | asm("bsrq %1,%0\n\t" | |
159 | "jnz 1f\n\t" | |
160 | "movq $-1,%0\n\t" | |
161 | "1:\n\t" | |
162 | : "=r" (r) : "rm" (x)); | |
163 | return r + 1; | |
164 | } | |
165 | #define HAS_FLS_U64 | |
166 | #endif | |
167 | ||
168 | #ifndef HAS_FLS_U64 | |
169 | static __attribute__((unused)) | |
170 | unsigned int fls_u64(uint64_t x) | |
171 | { | |
172 | unsigned int r = 64; | |
173 | ||
174 | if (!x) | |
175 | return 0; | |
176 | ||
177 | if (!(x & 0xFFFFFFFF00000000ULL)) { | |
178 | x <<= 32; | |
179 | r -= 32; | |
180 | } | |
181 | if (!(x & 0xFFFF000000000000ULL)) { | |
182 | x <<= 16; | |
183 | r -= 16; | |
184 | } | |
185 | if (!(x & 0xFF00000000000000ULL)) { | |
186 | x <<= 8; | |
187 | r -= 8; | |
188 | } | |
189 | if (!(x & 0xF000000000000000ULL)) { | |
190 | x <<= 4; | |
191 | r -= 4; | |
192 | } | |
193 | if (!(x & 0xC000000000000000ULL)) { | |
194 | x <<= 2; | |
195 | r -= 2; | |
196 | } | |
197 | if (!(x & 0x8000000000000000ULL)) { | |
198 | x <<= 1; | |
199 | r -= 1; | |
200 | } | |
201 | return r; | |
202 | } | |
203 | #endif | |
204 | ||
205 | #ifndef HAS_FLS_U32 | |
206 | static __attribute__((unused)) | |
207 | unsigned int fls_u32(uint32_t x) | |
208 | { | |
209 | unsigned int r = 32; | |
210 | ||
211 | if (!x) | |
212 | return 0; | |
213 | if (!(x & 0xFFFF0000U)) { | |
214 | x <<= 16; | |
215 | r -= 16; | |
216 | } | |
217 | if (!(x & 0xFF000000U)) { | |
218 | x <<= 8; | |
219 | r -= 8; | |
220 | } | |
221 | if (!(x & 0xF0000000U)) { | |
222 | x <<= 4; | |
223 | r -= 4; | |
224 | } | |
225 | if (!(x & 0xC0000000U)) { | |
226 | x <<= 2; | |
227 | r -= 2; | |
228 | } | |
229 | if (!(x & 0x80000000U)) { | |
230 | x <<= 1; | |
231 | r -= 1; | |
232 | } | |
233 | return r; | |
234 | } | |
235 | #endif | |
236 | ||
237 | static | |
238 | unsigned int fls_ulong(unsigned long x) | |
239 | { | |
240 | #if (CAA_BITS_PER_LONG == 32) | |
241 | return fls_u32(x); | |
242 | #else | |
243 | return fls_u64(x); | |
244 | #endif | |
245 | } | |
246 | ||
247 | /* | |
248 | * Return the minimum order for which x <= (1UL << order). | |
249 | * Return -1 if x is 0. | |
250 | */ | |
251 | int get_count_order_u32(uint32_t x) | |
252 | { | |
253 | if (!x) | |
254 | return -1; | |
255 | ||
256 | return fls_u32(x - 1); | |
257 | } | |
258 | ||
259 | /* | |
260 | * Return the minimum order for which x <= (1UL << order). | |
261 | * Return -1 if x is 0. | |
262 | */ | |
263 | int get_count_order_u64(uint64_t x) | |
264 | { | |
265 | if (!x) | |
266 | return -1; | |
267 | ||
268 | return fls_u64(x - 1); | |
269 | } | |
270 | ||
271 | /* | |
272 | * Return the minimum order for which x <= (1UL << order). | |
273 | * Return -1 if x is 0. | |
274 | */ | |
275 | int get_count_order_ulong(unsigned long x) | |
276 | { | |
277 | if (!x) | |
278 | return -1; | |
279 | ||
280 | return fls_ulong(x - 1); | |
281 | } | |
b9dfb167 DG |
282 | |
283 | const char *get_domain_str(enum lttng_domain_type domain) | |
284 | { | |
285 | const char *str_dom; | |
286 | ||
287 | switch (domain) { | |
288 | case LTTNG_DOMAIN_KERNEL: | |
289 | str_dom = str_kernel; | |
290 | break; | |
291 | case LTTNG_DOMAIN_UST: | |
292 | str_dom = str_ust; | |
293 | break; | |
294 | case LTTNG_DOMAIN_JUL: | |
295 | str_dom = str_jul; | |
296 | break; | |
5cdb6027 DG |
297 | case LTTNG_DOMAIN_LOG4J: |
298 | str_dom = str_log4j; | |
299 | break; | |
0e115563 DG |
300 | case LTTNG_DOMAIN_PYTHON: |
301 | str_dom = str_python; | |
302 | break; | |
b9dfb167 DG |
303 | default: |
304 | /* Should not have an unknown domain or else define it. */ | |
305 | assert(0); | |
306 | } | |
307 | ||
308 | return str_dom; | |
309 | } | |
8960e9cd DG |
310 | |
311 | /* | |
312 | * Spawn a lttng relayd daemon by forking and execv. | |
313 | */ | |
314 | int spawn_relayd(const char *pathname, int port) | |
315 | { | |
316 | int ret = 0; | |
317 | pid_t pid; | |
318 | char url[255]; | |
319 | ||
320 | if (!port) { | |
321 | port = DEFAULT_NETWORK_VIEWER_PORT; | |
322 | } | |
323 | ||
324 | ret = snprintf(url, sizeof(url), "tcp://localhost:%d", port); | |
325 | if (ret < 0) { | |
326 | goto end; | |
327 | } | |
328 | ||
329 | MSG("Spawning a relayd daemon"); | |
330 | pid = fork(); | |
331 | if (pid == 0) { | |
332 | /* | |
333 | * Spawn session daemon and tell | |
334 | * it to signal us when ready. | |
335 | */ | |
336 | execlp(pathname, "lttng-relayd", "-L", url, NULL); | |
337 | /* execlp only returns if error happened */ | |
338 | if (errno == ENOENT) { | |
339 | ERR("No relayd found. Use --relayd-path."); | |
340 | } else { | |
6f04ed72 | 341 | PERROR("execlp"); |
8960e9cd DG |
342 | } |
343 | kill(getppid(), SIGTERM); /* wake parent */ | |
344 | exit(EXIT_FAILURE); | |
345 | } else if (pid > 0) { | |
346 | goto end; | |
347 | } else { | |
6f04ed72 | 348 | PERROR("fork"); |
8960e9cd DG |
349 | ret = -1; |
350 | goto end; | |
351 | } | |
352 | ||
353 | end: | |
354 | return ret; | |
355 | } | |
356 | ||
357 | /* | |
358 | * Check if relayd is alive. | |
359 | * | |
360 | * Return 1 if found else 0 if NOT found. Negative value on error. | |
361 | */ | |
362 | int check_relayd(void) | |
363 | { | |
364 | int ret, fd; | |
365 | struct sockaddr_in sin; | |
366 | ||
367 | fd = socket(AF_INET, SOCK_STREAM, 0); | |
368 | if (fd < 0) { | |
6f04ed72 | 369 | PERROR("socket check relayd"); |
dd02a4c1 DG |
370 | ret = -1; |
371 | goto error_socket; | |
8960e9cd DG |
372 | } |
373 | ||
374 | sin.sin_family = AF_INET; | |
375 | sin.sin_port = htons(DEFAULT_NETWORK_VIEWER_PORT); | |
376 | ret = inet_pton(sin.sin_family, "127.0.0.1", &sin.sin_addr); | |
377 | if (ret < 1) { | |
6f04ed72 | 378 | PERROR("inet_pton check relayd"); |
dd02a4c1 | 379 | ret = -1; |
8960e9cd DG |
380 | goto error; |
381 | } | |
382 | ||
383 | /* | |
384 | * A successful connect means the relayd exists thus returning 0 else a | |
385 | * negative value means it does NOT exists. | |
386 | */ | |
387 | ret = connect(fd, &sin, sizeof(sin)); | |
388 | if (ret < 0) { | |
389 | /* Not found. */ | |
390 | ret = 0; | |
391 | } else { | |
392 | /* Already spawned. */ | |
393 | ret = 1; | |
394 | } | |
395 | ||
8960e9cd | 396 | error: |
dd02a4c1 | 397 | if (close(fd) < 0) { |
6f04ed72 | 398 | PERROR("close relayd fd"); |
dd02a4c1 DG |
399 | } |
400 | error_socket: | |
401 | return ret; | |
8960e9cd | 402 | } |
3ecec76a PP |
403 | |
404 | int print_missing_or_multiple_domains(unsigned int sum) | |
405 | { | |
406 | int ret = 0; | |
407 | ||
408 | if (sum == 0) { | |
409 | ERR("Please specify a domain (-k/-u/-j)."); | |
410 | ret = -1; | |
411 | } else if (sum > 1) { | |
412 | ERR("Multiple domains specified."); | |
413 | ret = -1; | |
414 | } | |
415 | ||
416 | return ret; | |
417 | } |