Commit | Line | Data |
---|---|---|
1670bffd PP |
1 | /* |
2 | * Babeltrace common functions | |
3 | * | |
4 | * Copyright 2016 Philippe Proulx <pproulx@efficios.com> | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
19 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
22 | * SOFTWARE. | |
23 | */ | |
24 | ||
290725f7 | 25 | #include <unistd.h> |
1670bffd PP |
26 | #include <string.h> |
27 | #include <sys/types.h> | |
28 | #include <pwd.h> | |
29 | #include <unistd.h> | |
30 | #include <assert.h> | |
db0f160a | 31 | #include <ctype.h> |
1670bffd PP |
32 | #include <glib.h> |
33 | #include <babeltrace/babeltrace-internal.h> | |
ad96d936 | 34 | #include <babeltrace/common-internal.h> |
1670bffd PP |
35 | |
36 | #define SYSTEM_PLUGIN_PATH INSTALL_LIBDIR "/babeltrace/plugins" | |
37 | #define HOME_ENV_VAR "HOME" | |
38 | #define HOME_PLUGIN_SUBPATH "/.local/lib/babeltrace/plugins" | |
39 | ||
6c4a0731 PP |
40 | static const char *bt_common_color_code_reset = ""; |
41 | static const char *bt_common_color_code_bold = ""; | |
42 | static const char *bt_common_color_code_fg_default = ""; | |
43 | static const char *bt_common_color_code_fg_red = ""; | |
44 | static const char *bt_common_color_code_fg_green = ""; | |
45 | static const char *bt_common_color_code_fg_yellow = ""; | |
46 | static const char *bt_common_color_code_fg_blue = ""; | |
47 | static const char *bt_common_color_code_fg_magenta = ""; | |
48 | static const char *bt_common_color_code_fg_cyan = ""; | |
49 | static const char *bt_common_color_code_fg_light_gray = ""; | |
50 | static const char *bt_common_color_code_bg_default = ""; | |
51 | static const char *bt_common_color_code_bg_red = ""; | |
52 | static const char *bt_common_color_code_bg_green = ""; | |
53 | static const char *bt_common_color_code_bg_yellow = ""; | |
54 | static const char *bt_common_color_code_bg_blue = ""; | |
55 | static const char *bt_common_color_code_bg_magenta = ""; | |
56 | static const char *bt_common_color_code_bg_cyan = ""; | |
57 | static const char *bt_common_color_code_bg_light_gray = ""; | |
58 | ||
59 | static | |
60 | void __attribute__((constructor)) bt_common_color_ctor(void) | |
61 | { | |
62 | if (bt_common_colors_supported()) { | |
63 | bt_common_color_code_reset = BT_COMMON_COLOR_RESET; | |
64 | bt_common_color_code_bold = BT_COMMON_COLOR_BOLD; | |
65 | bt_common_color_code_fg_default = BT_COMMON_COLOR_FG_DEFAULT; | |
66 | bt_common_color_code_fg_red = BT_COMMON_COLOR_FG_RED; | |
67 | bt_common_color_code_fg_green = BT_COMMON_COLOR_FG_GREEN; | |
68 | bt_common_color_code_fg_yellow = BT_COMMON_COLOR_FG_YELLOW; | |
69 | bt_common_color_code_fg_blue = BT_COMMON_COLOR_FG_BLUE; | |
70 | bt_common_color_code_fg_magenta = BT_COMMON_COLOR_FG_MAGENTA; | |
71 | bt_common_color_code_fg_cyan = BT_COMMON_COLOR_FG_CYAN; | |
72 | bt_common_color_code_fg_light_gray = BT_COMMON_COLOR_FG_LIGHT_GRAY; | |
73 | bt_common_color_code_bg_default = BT_COMMON_COLOR_BG_DEFAULT; | |
74 | bt_common_color_code_bg_red = BT_COMMON_COLOR_BG_RED; | |
75 | bt_common_color_code_bg_green = BT_COMMON_COLOR_BG_GREEN; | |
76 | bt_common_color_code_bg_yellow = BT_COMMON_COLOR_BG_YELLOW; | |
77 | bt_common_color_code_bg_blue = BT_COMMON_COLOR_BG_BLUE; | |
78 | bt_common_color_code_bg_magenta = BT_COMMON_COLOR_BG_MAGENTA; | |
79 | bt_common_color_code_bg_cyan = BT_COMMON_COLOR_BG_CYAN; | |
80 | bt_common_color_code_bg_light_gray = BT_COMMON_COLOR_BG_LIGHT_GRAY; | |
81 | } | |
82 | } | |
83 | ||
1670bffd PP |
84 | BT_HIDDEN |
85 | const char *bt_common_get_system_plugin_path(void) | |
86 | { | |
87 | return SYSTEM_PLUGIN_PATH; | |
88 | } | |
89 | ||
90 | BT_HIDDEN | |
91 | bool bt_common_is_setuid_setgid(void) | |
92 | { | |
93 | return (geteuid() != getuid() || getegid() != getgid()); | |
94 | } | |
95 | ||
96 | static char *bt_secure_getenv(const char *name) | |
97 | { | |
98 | if (bt_common_is_setuid_setgid()) { | |
99 | printf_error("Disregarding %s environment variable for setuid/setgid binary", | |
100 | name); | |
101 | return NULL; | |
102 | } | |
103 | return getenv(name); | |
104 | } | |
105 | ||
106 | static const char *get_home_dir(void) | |
107 | { | |
108 | char *val = NULL; | |
109 | struct passwd *pwd; | |
110 | ||
111 | val = bt_secure_getenv(HOME_ENV_VAR); | |
112 | if (val) { | |
113 | goto end; | |
114 | } | |
115 | /* Fallback on password file. */ | |
116 | pwd = getpwuid(getuid()); | |
117 | if (!pwd) { | |
118 | goto end; | |
119 | } | |
120 | val = pwd->pw_dir; | |
121 | end: | |
122 | return val; | |
123 | } | |
124 | ||
125 | BT_HIDDEN | |
126 | char *bt_common_get_home_plugin_path(void) | |
127 | { | |
128 | char *path = NULL; | |
129 | const char *home_dir; | |
130 | ||
131 | home_dir = get_home_dir(); | |
132 | if (!home_dir) { | |
133 | goto end; | |
134 | } | |
135 | ||
136 | if (strlen(home_dir) + strlen(HOME_PLUGIN_SUBPATH) + 1 >= PATH_MAX) { | |
137 | printf_error("Home directory path is too long: `%s`\n", | |
138 | home_dir); | |
139 | goto end; | |
140 | } | |
141 | ||
142 | path = malloc(PATH_MAX); | |
143 | if (!path) { | |
144 | goto end; | |
145 | } | |
146 | ||
147 | strcpy(path, home_dir); | |
148 | strcat(path, HOME_PLUGIN_SUBPATH); | |
149 | ||
150 | end: | |
151 | return path; | |
152 | } | |
153 | ||
154 | BT_HIDDEN | |
155 | int bt_common_append_plugin_path_dirs(const char *paths, GPtrArray *dirs) | |
156 | { | |
157 | int ret = 0; | |
158 | const char *at; | |
159 | const char *end; | |
160 | size_t init_dirs_len; | |
161 | ||
162 | assert(dirs); | |
163 | init_dirs_len = dirs->len; | |
164 | ||
165 | if (!paths) { | |
166 | /* Nothing to append */ | |
167 | goto end; | |
168 | } | |
169 | ||
170 | at = paths; | |
171 | end = paths + strlen(paths); | |
172 | ||
173 | while (at < end) { | |
174 | GString *path; | |
175 | const char *next_colon; | |
176 | ||
177 | next_colon = strchr(at, ':'); | |
178 | if (next_colon == at) { | |
179 | /* | |
180 | * Empty path: try next character (supported | |
181 | * to conform to the typical parsing of $PATH). | |
182 | */ | |
183 | at++; | |
184 | continue; | |
185 | } else if (!next_colon) { | |
186 | /* No more colon: use the remaining */ | |
187 | next_colon = paths + strlen(paths); | |
188 | } | |
189 | ||
190 | path = g_string_new(NULL); | |
191 | if (!path) { | |
192 | goto error; | |
193 | } | |
194 | ||
195 | g_string_append_len(path, at, next_colon - at); | |
196 | at = next_colon + 1; | |
197 | g_ptr_array_add(dirs, path); | |
198 | } | |
199 | ||
200 | goto end; | |
201 | ||
202 | error: | |
203 | ret = -1; | |
204 | ||
205 | /* Remove the new entries in dirs */ | |
206 | while (dirs->len > init_dirs_len) { | |
207 | g_ptr_array_remove_index(dirs, init_dirs_len); | |
208 | } | |
209 | ||
210 | end: | |
211 | return ret; | |
212 | } | |
290725f7 | 213 | |
ad96d936 PP |
214 | BT_HIDDEN |
215 | bool bt_common_colors_supported(void) | |
290725f7 PP |
216 | { |
217 | static bool supports_colors = false; | |
218 | static bool supports_colors_set = false; | |
219 | const char *term; | |
220 | ||
221 | if (supports_colors_set) { | |
222 | goto end; | |
223 | } | |
224 | ||
225 | supports_colors_set = true; | |
226 | ||
227 | term = getenv("TERM"); | |
228 | if (!term) { | |
229 | goto end; | |
230 | } | |
231 | ||
232 | if (strncmp(term, "xterm", 5) != 0 && | |
233 | strncmp(term, "rxvt", 4) != 0 && | |
234 | strncmp(term, "konsole", 7) != 0 && | |
69c72672 PP |
235 | strncmp(term, "gnome", 5) != 0 && |
236 | strncmp(term, "screen", 5) != 0 && | |
237 | strncmp(term, "tmux", 4) != 0 && | |
238 | strncmp(term, "putty", 5) != 0) { | |
290725f7 PP |
239 | goto end; |
240 | } | |
241 | ||
242 | if (!isatty(1)) { | |
243 | goto end; | |
244 | } | |
245 | ||
246 | supports_colors = true; | |
247 | ||
248 | end: | |
249 | return supports_colors; | |
250 | } | |
251 | ||
252 | BT_HIDDEN | |
253 | const char *bt_common_color_reset(void) | |
254 | { | |
6c4a0731 | 255 | return bt_common_color_code_reset; |
290725f7 PP |
256 | } |
257 | ||
258 | BT_HIDDEN | |
259 | const char *bt_common_color_bold(void) | |
260 | { | |
6c4a0731 | 261 | return bt_common_color_code_bold; |
290725f7 PP |
262 | } |
263 | ||
264 | BT_HIDDEN | |
265 | const char *bt_common_color_fg_default(void) | |
266 | { | |
6c4a0731 | 267 | return bt_common_color_code_fg_default; |
290725f7 PP |
268 | } |
269 | ||
270 | BT_HIDDEN | |
271 | const char *bt_common_color_fg_red(void) | |
272 | { | |
6c4a0731 | 273 | return bt_common_color_code_fg_red; |
290725f7 PP |
274 | } |
275 | ||
276 | BT_HIDDEN | |
277 | const char *bt_common_color_fg_green(void) | |
278 | { | |
6c4a0731 | 279 | return bt_common_color_code_fg_green; |
290725f7 PP |
280 | } |
281 | ||
282 | BT_HIDDEN | |
283 | const char *bt_common_color_fg_yellow(void) | |
284 | { | |
6c4a0731 | 285 | return bt_common_color_code_fg_yellow; |
290725f7 PP |
286 | } |
287 | ||
288 | BT_HIDDEN | |
289 | const char *bt_common_color_fg_blue(void) | |
290 | { | |
6c4a0731 | 291 | return bt_common_color_code_fg_blue; |
290725f7 PP |
292 | } |
293 | ||
294 | BT_HIDDEN | |
295 | const char *bt_common_color_fg_magenta(void) | |
296 | { | |
6c4a0731 | 297 | return bt_common_color_code_fg_magenta; |
290725f7 PP |
298 | } |
299 | ||
300 | BT_HIDDEN | |
301 | const char *bt_common_color_fg_cyan(void) | |
302 | { | |
6c4a0731 | 303 | return bt_common_color_code_fg_cyan; |
290725f7 PP |
304 | } |
305 | ||
306 | BT_HIDDEN | |
307 | const char *bt_common_color_fg_light_gray(void) | |
308 | { | |
6c4a0731 | 309 | return bt_common_color_code_fg_light_gray; |
290725f7 PP |
310 | } |
311 | ||
312 | BT_HIDDEN | |
313 | const char *bt_common_color_bg_default(void) | |
314 | { | |
6c4a0731 | 315 | return bt_common_color_code_bg_default; |
290725f7 PP |
316 | } |
317 | ||
318 | BT_HIDDEN | |
319 | const char *bt_common_color_bg_red(void) | |
320 | { | |
6c4a0731 | 321 | return bt_common_color_code_bg_red; |
290725f7 PP |
322 | } |
323 | ||
324 | BT_HIDDEN | |
325 | const char *bt_common_color_bg_green(void) | |
326 | { | |
6c4a0731 | 327 | return bt_common_color_code_bg_green; |
290725f7 PP |
328 | } |
329 | ||
330 | BT_HIDDEN | |
331 | const char *bt_common_color_bg_yellow(void) | |
332 | { | |
6c4a0731 | 333 | return bt_common_color_code_bg_yellow; |
290725f7 PP |
334 | } |
335 | ||
336 | BT_HIDDEN | |
337 | const char *bt_common_color_bg_blue(void) | |
338 | { | |
6c4a0731 | 339 | return bt_common_color_code_bg_blue; |
290725f7 PP |
340 | } |
341 | ||
342 | BT_HIDDEN | |
343 | const char *bt_common_color_bg_magenta(void) | |
344 | { | |
6c4a0731 | 345 | return bt_common_color_code_bg_magenta; |
290725f7 PP |
346 | } |
347 | ||
348 | BT_HIDDEN | |
349 | const char *bt_common_color_bg_cyan(void) | |
350 | { | |
6c4a0731 | 351 | return bt_common_color_code_bg_cyan; |
290725f7 PP |
352 | } |
353 | ||
354 | BT_HIDDEN | |
355 | const char *bt_common_color_bg_light_gray(void) | |
356 | { | |
6c4a0731 | 357 | return bt_common_color_code_bg_light_gray; |
290725f7 | 358 | } |
db0f160a PP |
359 | |
360 | BT_HIDDEN | |
361 | GString *bt_common_string_until(const char *input, const char *escapable_chars, | |
362 | const char *end_chars, size_t *end_pos) | |
363 | { | |
364 | GString *output = g_string_new(NULL); | |
365 | const char *ch; | |
366 | const char *es_char; | |
367 | const char *end_char; | |
368 | ||
369 | if (!output) { | |
370 | goto error; | |
371 | } | |
372 | ||
373 | for (ch = input; *ch != '\0'; ch++) { | |
374 | if (*ch == '\\') { | |
375 | bool continue_loop = false; | |
376 | ||
377 | if (ch[1] == '\0') { | |
378 | /* `\` at the end of the string: append `\` */ | |
379 | g_string_append_c(output, *ch); | |
380 | ch++; | |
381 | goto set_end_pos; | |
382 | } | |
383 | ||
384 | for (es_char = escapable_chars; *es_char != '\0'; es_char++) { | |
385 | if (ch[1] == *es_char) { | |
386 | /* | |
387 | * `\` followed by an escapable | |
388 | * character: append the escaped | |
389 | * character only. | |
390 | */ | |
391 | g_string_append_c(output, ch[1]); | |
392 | ch++; | |
393 | continue_loop = true; | |
394 | break; | |
395 | } | |
396 | } | |
397 | ||
398 | if (continue_loop) { | |
399 | continue; | |
400 | } | |
401 | ||
402 | /* | |
403 | * `\` followed by a non-escapable character: | |
404 | * append `\` and the character. | |
405 | */ | |
406 | g_string_append_c(output, *ch); | |
407 | g_string_append_c(output, ch[1]); | |
408 | ch++; | |
409 | continue; | |
410 | } else { | |
411 | for (end_char = end_chars; *end_char != '\0'; end_char++) { | |
412 | if (*ch == *end_char) { | |
413 | /* | |
414 | * End character found: | |
415 | * terminate this loop. | |
416 | */ | |
417 | goto set_end_pos; | |
418 | } | |
419 | } | |
420 | ||
421 | /* Normal character: append */ | |
422 | g_string_append_c(output, *ch); | |
423 | } | |
424 | } | |
425 | ||
426 | set_end_pos: | |
427 | if (end_pos) { | |
428 | *end_pos = ch - input; | |
429 | } | |
430 | ||
431 | goto end; | |
432 | ||
433 | error: | |
434 | if (output) { | |
435 | g_string_free(output, TRUE); | |
436 | } | |
437 | ||
438 | end: | |
439 | return output; | |
440 | } | |
441 | ||
442 | BT_HIDDEN | |
36b405c6 | 443 | GString *bt_common_shell_quote(const char *input, bool with_single_quotes) |
db0f160a PP |
444 | { |
445 | GString *output = g_string_new(NULL); | |
446 | const char *ch; | |
447 | bool no_quote = true; | |
448 | ||
449 | if (!output) { | |
450 | goto end; | |
451 | } | |
452 | ||
453 | if (strlen(input) == 0) { | |
36b405c6 PP |
454 | if (with_single_quotes) { |
455 | g_string_assign(output, "''"); | |
456 | } | |
457 | ||
db0f160a PP |
458 | goto end; |
459 | } | |
460 | ||
461 | for (ch = input; *ch != '\0'; ch++) { | |
462 | const char c = *ch; | |
463 | ||
464 | if (!g_ascii_isalpha(c) && !g_ascii_isdigit(c) && c != '_' && | |
465 | c != '@' && c != '%' && c != '+' && c != '=' && | |
466 | c != ':' && c != ',' && c != '.' && c != '/' && | |
467 | c != '-') { | |
468 | no_quote = false; | |
469 | break; | |
470 | } | |
471 | } | |
472 | ||
473 | if (no_quote) { | |
474 | g_string_assign(output, input); | |
475 | goto end; | |
476 | } | |
477 | ||
36b405c6 PP |
478 | if (with_single_quotes) { |
479 | g_string_assign(output, "'"); | |
480 | } | |
db0f160a PP |
481 | |
482 | for (ch = input; *ch != '\0'; ch++) { | |
483 | if (*ch == '\'') { | |
484 | g_string_append(output, "'\"'\"'"); | |
485 | } else { | |
486 | g_string_append_c(output, *ch); | |
487 | } | |
488 | } | |
489 | ||
36b405c6 PP |
490 | if (with_single_quotes) { |
491 | g_string_append_c(output, '\''); | |
492 | } | |
db0f160a PP |
493 | |
494 | end: | |
495 | return output; | |
496 | } | |
497 | ||
498 | BT_HIDDEN | |
499 | bool bt_common_string_is_printable(const char *input) | |
500 | { | |
501 | const char *ch; | |
502 | bool printable = true; | |
503 | assert(input); | |
504 | ||
505 | for (ch = input; *ch != '\0'; ch++) { | |
506 | if (!isprint(*ch) && *ch != '\n' && *ch != '\r' && | |
507 | *ch != '\t' && *ch != '\v') { | |
508 | printable = false; | |
509 | goto end; | |
510 | } | |
511 | } | |
512 | ||
513 | end: | |
514 | return printable; | |
515 | } | |
516 | ||
517 | BT_HIDDEN | |
518 | void bt_common_destroy_lttng_live_url_parts( | |
519 | struct bt_common_lttng_live_url_parts *parts) | |
520 | { | |
521 | if (!parts) { | |
522 | goto end; | |
523 | } | |
524 | ||
525 | if (parts->proto) { | |
526 | g_string_free(parts->proto, TRUE); | |
527 | parts->proto = NULL; | |
528 | } | |
529 | ||
530 | if (parts->hostname) { | |
531 | g_string_free(parts->hostname, TRUE); | |
532 | parts->hostname = NULL; | |
533 | } | |
534 | ||
535 | if (parts->target_hostname) { | |
536 | g_string_free(parts->target_hostname, TRUE); | |
537 | parts->target_hostname = NULL; | |
538 | } | |
539 | ||
540 | if (parts->session_name) { | |
541 | g_string_free(parts->session_name, TRUE); | |
542 | parts->session_name = NULL; | |
543 | } | |
544 | ||
545 | end: | |
546 | return; | |
547 | } | |
548 | ||
549 | BT_HIDDEN | |
550 | struct bt_common_lttng_live_url_parts bt_common_parse_lttng_live_url( | |
551 | const char *url, char *error_buf, size_t error_buf_size) | |
552 | { | |
553 | struct bt_common_lttng_live_url_parts parts; | |
554 | const char *at = url; | |
555 | size_t end_pos; | |
556 | ||
557 | assert(url); | |
558 | memset(&parts, 0, sizeof(parts)); | |
559 | parts.port = -1; | |
560 | ||
561 | /* Protocol */ | |
562 | parts.proto = bt_common_string_until(at, "", ":", &end_pos); | |
563 | if (!parts.proto || parts.proto->len == 0) { | |
564 | if (error_buf) { | |
565 | snprintf(error_buf, error_buf_size, "Missing protocol"); | |
566 | } | |
567 | ||
568 | goto error; | |
569 | } | |
570 | ||
571 | if (strcmp(parts.proto->str, "net") == 0) { | |
572 | g_string_assign(parts.proto, "net4"); | |
573 | } | |
574 | ||
575 | if (strcmp(parts.proto->str, "net4") != 0 && | |
576 | strcmp(parts.proto->str, "net6") != 0) { | |
577 | if (error_buf) { | |
578 | snprintf(error_buf, error_buf_size, | |
579 | "Unknown protocol: `%s`", parts.proto->str); | |
580 | } | |
581 | ||
582 | goto error; | |
583 | } | |
584 | ||
585 | if (at[end_pos] != ':') { | |
586 | if (error_buf) { | |
587 | snprintf(error_buf, error_buf_size, | |
588 | "Expecting `:` after `%s`", parts.proto->str); | |
589 | } | |
590 | ||
591 | goto error; | |
592 | } | |
593 | ||
594 | at += end_pos; | |
595 | ||
596 | /* :// */ | |
597 | if (strncmp(at, "://", 3) != 0) { | |
598 | if (error_buf) { | |
599 | snprintf(error_buf, error_buf_size, | |
600 | "Expecting `://` after protocol"); | |
601 | } | |
602 | ||
603 | goto error; | |
604 | } | |
605 | ||
606 | at += 3; | |
607 | ||
608 | /* Hostname */ | |
609 | parts.hostname = bt_common_string_until(at, "", ":/", &end_pos); | |
610 | if (!parts.hostname || parts.hostname->len == 0) { | |
611 | if (error_buf) { | |
612 | snprintf(error_buf, error_buf_size, "Missing hostname"); | |
613 | } | |
614 | ||
615 | goto error; | |
616 | } | |
617 | ||
618 | if (at[end_pos] == ':') { | |
619 | /* Port */ | |
620 | GString *port; | |
621 | ||
622 | at += end_pos + 1; | |
623 | port = bt_common_string_until(at, "", "/", &end_pos); | |
624 | if (!port || port->len == 0) { | |
625 | if (error_buf) { | |
626 | snprintf(error_buf, error_buf_size, "Missing port"); | |
627 | } | |
628 | ||
629 | goto error; | |
630 | } | |
631 | ||
632 | if (sscanf(port->str, "%d", &parts.port) != 1) { | |
633 | if (error_buf) { | |
634 | snprintf(error_buf, error_buf_size, | |
635 | "Invalid port: `%s`", port->str); | |
636 | } | |
637 | ||
638 | g_string_free(port, TRUE); | |
639 | goto error; | |
640 | } | |
641 | ||
642 | g_string_free(port, TRUE); | |
643 | ||
644 | if (parts.port < 0 || parts.port >= 65536) { | |
645 | if (error_buf) { | |
646 | snprintf(error_buf, error_buf_size, | |
647 | "Invalid port: %d", parts.port); | |
648 | } | |
649 | ||
650 | goto error; | |
651 | } | |
652 | } | |
653 | ||
654 | if (at[end_pos] == '\0') { | |
655 | goto end; | |
656 | } | |
657 | ||
658 | at += end_pos; | |
659 | ||
660 | /* /host/ */ | |
661 | if (strncmp(at, "/host/", 6) != 0) { | |
662 | if (error_buf) { | |
663 | snprintf(error_buf, error_buf_size, | |
664 | "Expecting `/host/` after hostname or port"); | |
665 | } | |
666 | ||
667 | goto error; | |
668 | } | |
669 | ||
670 | at += 6; | |
671 | ||
672 | /* Target hostname */ | |
673 | parts.target_hostname = bt_common_string_until(at, "", "/", &end_pos); | |
674 | if (!parts.target_hostname || parts.target_hostname->len == 0) { | |
675 | if (error_buf) { | |
676 | snprintf(error_buf, error_buf_size, | |
677 | "Missing target hostname"); | |
678 | } | |
679 | ||
680 | goto error; | |
681 | } | |
682 | ||
683 | if (at[end_pos] == '\0') { | |
684 | goto end; | |
685 | } | |
686 | ||
687 | at += end_pos + 1; | |
688 | ||
689 | /* Session name */ | |
690 | parts.session_name = bt_common_string_until(at, "", "/", &end_pos); | |
691 | if (!parts.session_name || parts.session_name->len == 0) { | |
692 | if (error_buf) { | |
693 | snprintf(error_buf, error_buf_size, | |
694 | "Missing session name"); | |
695 | } | |
696 | ||
697 | goto error; | |
698 | } | |
699 | ||
700 | if (at[end_pos] == '/') { | |
701 | if (error_buf) { | |
702 | snprintf(error_buf, error_buf_size, | |
703 | "Unexpected `/` after session name (`%s`)", | |
704 | parts.session_name->str); | |
705 | } | |
706 | ||
707 | goto error; | |
708 | } | |
709 | ||
710 | goto end; | |
711 | ||
712 | error: | |
713 | bt_common_destroy_lttng_live_url_parts(&parts); | |
714 | ||
715 | end: | |
716 | return parts; | |
717 | } | |
9009cc24 PP |
718 | |
719 | BT_HIDDEN | |
720 | void bt_common_normalize_star_glob_pattern(char *pattern) | |
721 | { | |
722 | const char *p; | |
723 | char *np; | |
724 | bool got_star = false; | |
725 | ||
726 | assert(pattern); | |
727 | ||
728 | for (p = pattern, np = pattern; *p != '\0'; p++) { | |
729 | switch (*p) { | |
730 | case '*': | |
731 | if (got_star) { | |
732 | /* Avoid consecutive stars. */ | |
733 | continue; | |
734 | } | |
735 | ||
736 | got_star = true; | |
737 | break; | |
738 | case '\\': | |
739 | /* Copy backslash character. */ | |
740 | *np = *p; | |
741 | np++; | |
742 | p++; | |
743 | ||
744 | if (*p == '\0') { | |
745 | goto end; | |
746 | } | |
747 | ||
748 | /* Fall through default case. */ | |
749 | default: | |
750 | got_star = false; | |
751 | break; | |
752 | } | |
753 | ||
754 | /* Copy single character. */ | |
755 | *np = *p; | |
756 | np++; | |
757 | } | |
758 | ||
759 | end: | |
760 | *np = '\0'; | |
761 | } | |
762 | ||
763 | static inline | |
764 | bool at_end_of_pattern(const char *p, const char *pattern, size_t pattern_len) | |
765 | { | |
766 | return (p - pattern) == pattern_len || *p == '\0'; | |
767 | } | |
768 | ||
769 | /* | |
770 | * Globbing matching function with the star feature only (`?` and | |
771 | * character sets are not supported). This matches `candidate` (plain | |
772 | * string) against `pattern`. A literal star can be escaped with `\` in | |
773 | * `pattern`. | |
774 | * | |
775 | * `pattern_len` or `candidate_len` can be greater than the actual | |
776 | * string length of `pattern` or `candidate` if the string is | |
777 | * null-terminated. | |
778 | */ | |
779 | BT_HIDDEN | |
780 | bool bt_common_star_glob_match(const char *pattern, size_t pattern_len, | |
781 | const char *candidate, size_t candidate_len) { | |
782 | const char *retry_c = candidate, *retry_p = pattern, *c, *p; | |
783 | bool got_a_star = false; | |
784 | ||
785 | retry: | |
786 | c = retry_c; | |
787 | p = retry_p; | |
788 | ||
789 | /* | |
790 | * The concept here is to retry a match in the specific case | |
791 | * where we already got a star. The retry position for the | |
792 | * pattern is just after the most recent star, and the retry | |
793 | * position for the candidate is the character following the | |
794 | * last try's first character. | |
795 | * | |
796 | * Example: | |
797 | * | |
798 | * candidate: hi ev every onyx one | |
799 | * ^ | |
800 | * pattern: hi*every*one | |
801 | * ^ | |
802 | * | |
803 | * candidate: hi ev every onyx one | |
804 | * ^ | |
805 | * pattern: hi*every*one | |
806 | * ^ | |
807 | * | |
808 | * candidate: hi ev every onyx one | |
809 | * ^ | |
810 | * pattern: hi*every*one | |
811 | * ^ | |
812 | * | |
813 | * candidate: hi ev every onyx one | |
814 | * ^ | |
815 | * pattern: hi*every*one | |
816 | * ^ MISMATCH | |
817 | * | |
818 | * candidate: hi ev every onyx one | |
819 | * ^ | |
820 | * pattern: hi*every*one | |
821 | * ^ | |
822 | * | |
823 | * candidate: hi ev every onyx one | |
824 | * ^^ | |
825 | * pattern: hi*every*one | |
826 | * ^^ | |
827 | * | |
828 | * candidate: hi ev every onyx one | |
829 | * ^ ^ | |
830 | * pattern: hi*every*one | |
831 | * ^ ^ MISMATCH | |
832 | * | |
833 | * candidate: hi ev every onyx one | |
834 | * ^ | |
835 | * pattern: hi*every*one | |
836 | * ^ MISMATCH | |
837 | * | |
838 | * candidate: hi ev every onyx one | |
839 | * ^ | |
840 | * pattern: hi*every*one | |
841 | * ^ MISMATCH | |
842 | * | |
843 | * candidate: hi ev every onyx one | |
844 | * ^ | |
845 | * pattern: hi*every*one | |
846 | * ^ | |
847 | * | |
848 | * candidate: hi ev every onyx one | |
849 | * ^^ | |
850 | * pattern: hi*every*one | |
851 | * ^^ | |
852 | * | |
853 | * candidate: hi ev every onyx one | |
854 | * ^ ^ | |
855 | * pattern: hi*every*one | |
856 | * ^ ^ | |
857 | * | |
858 | * candidate: hi ev every onyx one | |
859 | * ^ ^ | |
860 | * pattern: hi*every*one | |
861 | * ^ ^ | |
862 | * | |
863 | * candidate: hi ev every onyx one | |
864 | * ^ ^ | |
865 | * pattern: hi*every*one | |
866 | * ^ ^ | |
867 | * | |
868 | * candidate: hi ev every onyx one | |
869 | * ^ | |
870 | * pattern: hi*every*one | |
871 | * ^ | |
872 | * | |
873 | * candidate: hi ev every onyx one | |
874 | * ^ | |
875 | * pattern: hi*every*one | |
876 | * ^ MISMATCH | |
877 | * | |
878 | * candidate: hi ev every onyx one | |
879 | * ^ | |
880 | * pattern: hi*every*one | |
881 | * ^ | |
882 | * | |
883 | * candidate: hi ev every onyx one | |
884 | * ^^ | |
885 | * pattern: hi*every*one | |
886 | * ^^ | |
887 | * | |
888 | * candidate: hi ev every onyx one | |
889 | * ^ ^ | |
890 | * pattern: hi*every*one | |
891 | * ^ ^ MISMATCH | |
892 | * | |
893 | * candidate: hi ev every onyx one | |
894 | * ^ | |
895 | * pattern: hi*every*one | |
896 | * ^ MISMATCH | |
897 | * | |
898 | * candidate: hi ev every onyx one | |
899 | * ^ | |
900 | * pattern: hi*every*one | |
901 | * ^ MISMATCH | |
902 | * | |
903 | * candidate: hi ev every onyx one | |
904 | * ^ | |
905 | * pattern: hi*every*one | |
906 | * ^ MISMATCH | |
907 | * | |
908 | * candidate: hi ev every onyx one | |
909 | * ^ | |
910 | * pattern: hi*every*one | |
911 | * ^ MISMATCH | |
912 | * | |
913 | * candidate: hi ev every onyx one | |
914 | * ^ | |
915 | * pattern: hi*every*one | |
916 | * ^ | |
917 | * | |
918 | * candidate: hi ev every onyx one | |
919 | * ^^ | |
920 | * pattern: hi*every*one | |
921 | * ^^ | |
922 | * | |
923 | * candidate: hi ev every onyx one | |
924 | * ^ ^ | |
925 | * pattern: hi*every*one | |
926 | * ^ ^ | |
927 | * | |
928 | * candidate: hi ev every onyx one | |
929 | * ^ ^ | |
930 | * pattern: hi*every*one | |
931 | * ^ ^ SUCCESS | |
932 | */ | |
933 | while ((c - candidate) < candidate_len && *c != '\0') { | |
934 | assert(*c); | |
935 | ||
936 | if (at_end_of_pattern(p, pattern, pattern_len)) { | |
937 | goto end_of_pattern; | |
938 | } | |
939 | ||
940 | switch (*p) { | |
941 | case '*': | |
942 | got_a_star = true; | |
943 | ||
944 | /* | |
945 | * Our first try starts at the current candidate | |
946 | * character and after the star in the pattern. | |
947 | */ | |
948 | retry_c = c; | |
949 | retry_p = p + 1; | |
950 | ||
951 | if (at_end_of_pattern(retry_p, pattern, pattern_len)) { | |
952 | /* | |
953 | * Star at the end of the pattern at | |
954 | * this point: automatic match. | |
955 | */ | |
956 | return true; | |
957 | } | |
958 | ||
959 | goto retry; | |
960 | case '\\': | |
961 | /* Go to escaped character. */ | |
962 | p++; | |
963 | ||
964 | /* | |
965 | * Fall through the default case which compares | |
966 | * the escaped character now. | |
967 | */ | |
968 | default: | |
969 | if (at_end_of_pattern(p, pattern, pattern_len) || | |
970 | *c != *p) { | |
971 | end_of_pattern: | |
972 | /* Character mismatch OR end of pattern. */ | |
973 | if (!got_a_star) { | |
974 | /* | |
975 | * We didn't get any star yet, | |
976 | * so this first mismatch | |
977 | * automatically makes the whole | |
978 | * test fail. | |
979 | */ | |
980 | return false; | |
981 | } | |
982 | ||
983 | /* | |
984 | * Next try: next candidate character, | |
985 | * original pattern character (following | |
986 | * the most recent star). | |
987 | */ | |
988 | retry_c++; | |
989 | goto retry; | |
990 | } | |
991 | break; | |
992 | } | |
993 | ||
994 | /* Next pattern and candidate characters. */ | |
995 | c++; | |
996 | p++; | |
997 | } | |
998 | ||
999 | /* | |
1000 | * We checked every candidate character and we're still in a | |
1001 | * success state: the only pattern character allowed to remain | |
1002 | * is a star. | |
1003 | */ | |
1004 | if (at_end_of_pattern(p, pattern, pattern_len)) { | |
1005 | return true; | |
1006 | } | |
1007 | ||
1008 | p++; | |
1009 | return p[-1] == '*' && at_end_of_pattern(p, pattern, pattern_len); | |
1010 | } |