Create BSD wrapper for uuid
[babeltrace.git] / converter / babeltrace-log.c
1 /*
2 * babeltrace-log.c
3 *
4 * BabelTrace - Convert Text Log to CTF
5 *
6 * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
7 *
8 * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
9 *
10 * Permission is hereby granted, free of charge, to any person obtaining a copy
11 * of this software and associated documentation files (the "Software"), to deal
12 * in the Software without restriction, including without limitation the rights
13 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
14 * copies of the Software, and to permit persons to whom the Software is
15 * furnished to do so, subject to the following conditions:
16 *
17 * The above copyright notice and this permission notice shall be included in
18 * all copies or substantial portions of the Software.
19 *
20 * Depends on glibc 2.10 for getline().
21 */
22
23 #include <config.h>
24 #include <sys/types.h>
25 #include <sys/stat.h>
26 #include <fcntl.h>
27 #include <sys/mman.h>
28 #include <dirent.h>
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <stdint.h>
32 #include <unistd.h>
33 #include <errno.h>
34 #include <uuid/uuid.h>
35 #include <string.h>
36 #include <endian.h>
37
38 #include <babeltrace/babeltrace-internal.h>
39 #include <babeltrace/ctf/types.h>
40 #include <babeltrace/uuid.h>
41
42 #define USEC_PER_SEC 1000000UL
43
44 int babeltrace_debug, babeltrace_verbose;
45
46 static char *s_outputname;
47 static int s_timestamp;
48 static int s_help;
49 static uuid_t s_uuid;
50
51 /* Metadata format string */
52 static const char metadata_fmt[] =
53 "/* CTF 1.8 */\n"
54 "typealias integer { size = 8; align = 8; signed = false; } := uint8_t;\n"
55 "typealias integer { size = 32; align = 32; signed = false; } := uint32_t;\n"
56 "\n"
57 "trace {\n"
58 " major = %u;\n" /* major (e.g. 0) */
59 " minor = %u;\n" /* minor (e.g. 1) */
60 " uuid = \"%s\";\n" /* UUID */
61 " byte_order = %s;\n" /* be or le */
62 " packet.header := struct {\n"
63 " uint32_t magic;\n"
64 " uint8_t uuid[16];\n"
65 " };\n"
66 "};\n"
67 "\n"
68 "stream {\n"
69 " packet.context := struct {\n"
70 " uint32_t content_size;\n"
71 " uint32_t packet_size;\n"
72 " };\n"
73 "%s" /* Stream event header (opt.) */
74 "};\n"
75 "\n"
76 "event {\n"
77 " name = string;\n"
78 " fields := struct { string str; };\n"
79 "};\n";
80
81 static const char metadata_stream_event_header_timestamp[] =
82 " typealias integer { size = 64; align = 64; signed = false; } := uint64_t;\n"
83 " event.header := struct {\n"
84 " uint64_t timestamp;\n"
85 " };\n";
86
87 static
88 void print_metadata(FILE *fp)
89 {
90 char uuid_str[BABELTRACE_UUID_STR_LEN];
91 unsigned int major = 0, minor = 0;
92 int ret;
93
94 ret = sscanf(VERSION, "%u.%u", &major, &minor);
95 if (ret != 2)
96 fprintf(stderr, "[warning] Incorrect babeltrace version format\n.");
97 babeltrace_uuid_unparse(s_uuid, uuid_str);
98 fprintf(fp, metadata_fmt,
99 major,
100 minor,
101 uuid_str,
102 BYTE_ORDER == LITTLE_ENDIAN ? "le" : "be",
103 s_timestamp ? metadata_stream_event_header_timestamp : "");
104 }
105
106 static
107 void write_packet_header(struct ctf_stream_pos *pos, uuid_t uuid)
108 {
109 struct ctf_stream_pos dummy;
110
111 /* magic */
112 ctf_dummy_pos(pos, &dummy);
113 ctf_align_pos(&dummy, sizeof(uint32_t) * CHAR_BIT);
114 ctf_move_pos(&dummy, sizeof(uint32_t) * CHAR_BIT);
115 assert(!ctf_pos_packet(&dummy));
116
117 ctf_align_pos(pos, sizeof(uint32_t) * CHAR_BIT);
118 *(uint32_t *) ctf_get_pos_addr(pos) = 0xC1FC1FC1;
119 ctf_move_pos(pos, sizeof(uint32_t) * CHAR_BIT);
120
121 /* uuid */
122 ctf_dummy_pos(pos, &dummy);
123 ctf_align_pos(&dummy, sizeof(uint8_t) * CHAR_BIT);
124 ctf_move_pos(&dummy, 16 * CHAR_BIT);
125 assert(!ctf_pos_packet(&dummy));
126
127 ctf_align_pos(pos, sizeof(uint8_t) * CHAR_BIT);
128 memcpy(ctf_get_pos_addr(pos), uuid, 16);
129 ctf_move_pos(pos, 16 * CHAR_BIT);
130 }
131
132 static
133 void write_packet_context(struct ctf_stream_pos *pos)
134 {
135 struct ctf_stream_pos dummy;
136
137 /* content_size */
138 ctf_dummy_pos(pos, &dummy);
139 ctf_align_pos(&dummy, sizeof(uint32_t) * CHAR_BIT);
140 ctf_move_pos(&dummy, sizeof(uint32_t) * CHAR_BIT);
141 assert(!ctf_pos_packet(&dummy));
142
143 ctf_align_pos(pos, sizeof(uint32_t) * CHAR_BIT);
144 *(uint32_t *) ctf_get_pos_addr(pos) = -1U; /* Not known yet */
145 pos->content_size_loc = (uint32_t *) ctf_get_pos_addr(pos);
146 ctf_move_pos(pos, sizeof(uint32_t) * CHAR_BIT);
147
148 /* packet_size */
149 ctf_dummy_pos(pos, &dummy);
150 ctf_align_pos(&dummy, sizeof(uint32_t) * CHAR_BIT);
151 ctf_move_pos(&dummy, sizeof(uint32_t) * CHAR_BIT);
152 assert(!ctf_pos_packet(&dummy));
153
154 ctf_align_pos(pos, sizeof(uint32_t) * CHAR_BIT);
155 *(uint32_t *) ctf_get_pos_addr(pos) = pos->packet_size;
156 ctf_move_pos(pos, sizeof(uint32_t) * CHAR_BIT);
157 }
158
159 static
160 void write_event_header(struct ctf_stream_pos *pos, char *line,
161 char **tline, size_t len, size_t *tlen,
162 uint64_t *ts)
163 {
164 unsigned long sec, usec;
165 int ret;
166
167 if (!s_timestamp)
168 return;
169
170 /* Only need to be executed on first pass (dummy) */
171 if (pos->dummy) {
172 /* Extract time from input line */
173 ret = sscanf(line, "[%lu.%lu] ", &sec, &usec);
174 if (ret == 2) {
175 *tline = strchr(line, ']');
176 assert(*tline);
177 (*tline)++;
178 if ((*tline)[0] == ' ') {
179 (*tline)++;
180 }
181 *tlen = len + line - *tline;
182 *ts = (uint64_t) sec * USEC_PER_SEC + (uint64_t) usec;
183 }
184 }
185 /* timestamp */
186 ctf_align_pos(pos, sizeof(uint64_t) * CHAR_BIT);
187 if (!pos->dummy)
188 *(uint64_t *) ctf_get_pos_addr(pos) = *ts;
189 ctf_move_pos(pos, sizeof(uint64_t) * CHAR_BIT);
190 }
191
192 static
193 void trace_string(char *line, struct ctf_stream_pos *pos, size_t len)
194 {
195 struct ctf_stream_pos dummy;
196 int attempt = 0;
197 char *tline = line; /* tline is start of text, after timestamp */
198 size_t tlen = len;
199 uint64_t ts = 0;
200
201 printf_debug("read: %s\n", line);
202 retry:
203 ctf_dummy_pos(pos, &dummy);
204 write_event_header(&dummy, line, &tline, len, &tlen, &ts);
205 ctf_align_pos(&dummy, sizeof(uint8_t) * CHAR_BIT);
206 ctf_move_pos(&dummy, tlen * CHAR_BIT);
207 if (ctf_pos_packet(&dummy)) {
208 ctf_pos_pad_packet(pos);
209 write_packet_header(pos, s_uuid);
210 write_packet_context(pos);
211 if (attempt++ == 1) {
212 fprintf(stderr, "[Error] Line too large for packet size (%zukB) (discarded)\n",
213 pos->packet_size / CHAR_BIT / 1024);
214 return;
215 }
216 goto retry;
217 }
218
219 write_event_header(pos, line, &tline, len, &tlen, &ts);
220 ctf_align_pos(pos, sizeof(uint8_t) * CHAR_BIT);
221 memcpy(ctf_get_pos_addr(pos), tline, tlen);
222 ctf_move_pos(pos, tlen * CHAR_BIT);
223 }
224
225 static
226 void trace_text(FILE *input, int output)
227 {
228 struct ctf_stream_pos pos;
229 ssize_t len;
230 char *line = NULL, *nl;
231 size_t linesize;
232
233 ctf_init_pos(&pos, output, O_RDWR);
234
235 write_packet_header(&pos, s_uuid);
236 write_packet_context(&pos);
237 for (;;) {
238 len = getline(&line, &linesize, input);
239 if (len < 0)
240 break;
241 nl = strrchr(line, '\n');
242 if (nl)
243 *nl = '\0';
244 trace_string(line, &pos, nl - line + 1);
245 }
246 ctf_fini_pos(&pos);
247 }
248
249 static
250 void usage(FILE *fp)
251 {
252 fprintf(fp, "BabelTrace Log Converter %s\n", VERSION);
253 fprintf(fp, "\n");
254 fprintf(fp, "Convert for a text log (read from standard input) to CTF.\n");
255 fprintf(fp, "\n");
256 fprintf(fp, "usage : babeltrace-log [OPTIONS] OUTPUT\n");
257 fprintf(fp, "\n");
258 fprintf(fp, " OUTPUT Output trace path\n");
259 fprintf(fp, "\n");
260 fprintf(fp, " -t With timestamps (format: [sec.usec] string\\n)\n");
261 fprintf(fp, "\n");
262 }
263
264 static
265 int parse_args(int argc, char **argv)
266 {
267 int i;
268
269 for (i = 1; i < argc; i++) {
270 if (!strcmp(argv[i], "-t"))
271 s_timestamp = 1;
272 else if (!strcmp(argv[i], "-h")) {
273 s_help = 1;
274 return 0;
275 } else if (argv[i][0] == '-')
276 return -EINVAL;
277 else
278 s_outputname = argv[i];
279 }
280 if (!s_outputname)
281 return -EINVAL;
282 return 0;
283 }
284
285 int main(int argc, char **argv)
286 {
287 int fd, metadata_fd, ret;
288 DIR *dir;
289 int dir_fd;
290 FILE *metadata_fp;
291
292 ret = parse_args(argc, argv);
293 if (ret) {
294 fprintf(stderr, "Error: invalid argument.\n");
295 usage(stderr);
296 goto error;
297 }
298
299 if (s_help) {
300 usage(stdout);
301 exit(EXIT_SUCCESS);
302 }
303
304 ret = mkdir(s_outputname, S_IRWXU|S_IRWXG);
305 if (ret) {
306 perror("mkdir");
307 goto error;
308 }
309
310 dir = opendir(s_outputname);
311 if (!dir) {
312 perror("opendir");
313 goto error_rmdir;
314 }
315 dir_fd = dirfd(dir);
316 if (dir_fd < 0) {
317 perror("dirfd");
318 goto error_closedir;
319 }
320
321 fd = openat(dir_fd, "datastream", O_RDWR|O_CREAT,
322 S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP);
323 if (fd < 0) {
324 perror("openat");
325 goto error_closedirfd;
326 }
327
328 metadata_fd = openat(dir_fd, "metadata", O_RDWR|O_CREAT,
329 S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP);
330 if (fd < 0) {
331 perror("openat");
332 goto error_closedatastream;
333 }
334 metadata_fp = fdopen(metadata_fd, "w");
335 if (!metadata_fp) {
336 perror("fdopen");
337 goto error_closemetadatafd;
338 }
339
340 uuid_generate(s_uuid);
341 print_metadata(metadata_fp);
342 trace_text(stdin, fd);
343
344 close(fd);
345 exit(EXIT_SUCCESS);
346
347 /* error handling */
348 error_closemetadatafd:
349 ret = close(metadata_fd);
350 if (ret)
351 perror("close");
352 error_closedatastream:
353 ret = close(fd);
354 if (ret)
355 perror("close");
356 error_closedirfd:
357 ret = close(dir_fd);
358 if (ret)
359 perror("close");
360 error_closedir:
361 ret = closedir(dir);
362 if (ret)
363 perror("closedir");
364 error_rmdir:
365 ret = rmdir(s_outputname);
366 if (ret)
367 perror("rmdir");
368 error:
369 exit(EXIT_FAILURE);
370 }
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