1 /* Debugging/Logging support code */
3 /* (C) 2008-2010 by Harald Welte <laforge@gnumonks.org>
4 * (C) 2008 by Holger Hans Peter Freyther <zecke@selfish.org>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 #include "../config.h"
36 #include <osmocore/talloc.h>
37 #include <osmocore/utils.h>
38 #include <osmocore/logging.h>
40 const struct log_info *osmo_log_info;
42 static struct log_context log_context;
43 static void *tall_log_ctx = NULL;
44 static LLIST_HEAD(target_list);
46 static const struct value_string loglevel_strs[] = {
48 { LOGL_DEBUG, "DEBUG" },
49 { LOGL_INFO, "INFO" },
50 { LOGL_NOTICE, "NOTICE" },
51 { LOGL_ERROR, "ERROR" },
52 { LOGL_FATAL, "FATAL" },
56 int log_parse_level(const char *lvl)
58 return get_string_value(loglevel_strs, lvl);
61 const char *log_level_str(unsigned int lvl)
63 return get_value_string(loglevel_strs, lvl);
66 int log_parse_category(const char *category)
70 for (i = 0; i < osmo_log_info->num_cat; ++i) {
71 if (!strcasecmp(osmo_log_info->cat[i].name+1, category))
79 * Parse the category mask.
80 * The format can be this: category1:category2:category3
81 * or category1,2:category2,3:...
83 void log_parse_category_mask(struct log_target* target, const char *_mask)
86 char *mask = strdup(_mask);
87 char *category_token = NULL;
89 /* Disable everything to enable it afterwards */
90 for (i = 0; i < ARRAY_SIZE(target->categories); ++i)
91 target->categories[i].enabled = 0;
93 category_token = strtok(mask, ":");
95 for (i = 0; i < osmo_log_info->num_cat; ++i) {
96 char* colon = strstr(category_token, ",");
97 int length = strlen(category_token);
100 length = colon - category_token;
102 if (strncasecmp(osmo_log_info->cat[i].name,
103 category_token, length) == 0) {
107 level = atoi(colon+1);
109 target->categories[i].enabled = 1;
110 target->categories[i].loglevel = level;
113 } while ((category_token = strtok(NULL, ":")));
118 static const char* color(int subsys)
120 if (subsys < osmo_log_info->num_cat)
121 return osmo_log_info->cat[subsys].color;
126 static void _output(struct log_target *target, unsigned int subsys,
127 char *file, int line, int cont, const char *format,
136 /* prepare the data */
142 /* are we using color */
143 if (target->use_color) {
144 const char *c = color(subsys);
146 snprintf(col, sizeof(col), "%s", color(subsys));
147 col[sizeof(col)-1] = '\0';
150 vsnprintf(buf, sizeof(buf), format, ap);
151 buf[sizeof(buf)-1] = '\0';
154 if (target->print_timestamp) {
158 timestr = ctime(&tm);
159 timestr[strlen(timestr)-1] = '\0';
160 snprintf(tim, sizeof(tim), "%s ", timestr);
161 tim[sizeof(tim)-1] = '\0';
163 snprintf(sub, sizeof(sub), "<%4.4x> %s:%d ", subsys, file, line);
164 sub[sizeof(sub)-1] = '\0';
167 snprintf(final, sizeof(final), "%s%s%s%s%s", col, tim, sub, buf,
168 target->use_color ? "\033[0;m" : "");
169 final[sizeof(final)-1] = '\0';
170 target->output(target, final);
174 static void _logp(unsigned int subsys, int level, char *file, int line,
175 int cont, const char *format, va_list ap)
177 struct log_target *tar;
179 llist_for_each_entry(tar, &target_list, entry) {
180 struct log_category *category;
183 category = &tar->categories[subsys];
184 /* subsystem is not supposed to be logged */
185 if (!category->enabled)
188 /* Check the global log level */
189 if (tar->loglevel != 0 && level < tar->loglevel)
192 /* Check the category log level */
193 if (tar->loglevel == 0 && category->loglevel != 0 &&
194 level < category->loglevel)
197 /* Apply filters here... if that becomes messy we will
198 * need to put filters in a list and each filter will
199 * say stop, continue, output */
200 if ((tar->filter_map & LOG_FILTER_ALL) != 0)
202 else if (osmo_log_info->filter_fn)
203 output = osmo_log_info->filter_fn(&log_context,
207 /* FIXME: copying the va_list is an ugly
208 * workaround against a bug hidden somewhere in
209 * _output. If we do not copy here, the first
210 * call to _output() will corrupt the va_list
211 * contents, and any further _output() calls
212 * with the same va_list will segfault */
215 _output(tar, subsys, file, line, cont, format, bp);
221 void logp(unsigned int subsys, char *file, int line, int cont,
222 const char *format, ...)
226 va_start(ap, format);
227 _logp(subsys, LOGL_DEBUG, file, line, cont, format, ap);
231 void logp2(unsigned int subsys, unsigned int level, char *file, int line, int cont, const char *format, ...)
235 va_start(ap, format);
236 _logp(subsys, level, file, line, cont, format, ap);
240 void log_add_target(struct log_target *target)
242 llist_add_tail(&target->entry, &target_list);
245 void log_del_target(struct log_target *target)
247 llist_del(&target->entry);
250 void log_reset_context(void)
252 memset(&log_context, 0, sizeof(log_context));
255 int log_set_context(uint8_t ctx_nr, void *value)
257 if (ctx_nr > LOG_MAX_CTX)
260 log_context.ctx[ctx_nr] = value;
265 void log_set_all_filter(struct log_target *target, int all)
268 target->filter_map |= LOG_FILTER_ALL;
270 target->filter_map &= ~LOG_FILTER_ALL;
273 void log_set_use_color(struct log_target *target, int use_color)
275 target->use_color = use_color;
278 void log_set_print_timestamp(struct log_target *target, int print_timestamp)
280 target->print_timestamp = print_timestamp;
283 void log_set_log_level(struct log_target *target, int log_level)
285 target->loglevel = log_level;
288 void log_set_category_filter(struct log_target *target, int category,
289 int enable, int level)
291 if (category >= osmo_log_info->num_cat)
293 target->categories[category].enabled = !!enable;
294 target->categories[category].loglevel = level;
297 static void _file_output(struct log_target *target, const char *log)
299 fprintf(target->tgt_file.out, "%s", log);
300 fflush(target->tgt_file.out);
303 struct log_target *log_target_create(void)
305 struct log_target *target;
308 target = talloc_zero(tall_log_ctx, struct log_target);
312 INIT_LLIST_HEAD(&target->entry);
314 /* initialize the per-category enabled/loglevel from defaults */
315 for (i = 0; i < osmo_log_info->num_cat; i++) {
316 struct log_category *cat = &target->categories[i];
317 cat->enabled = osmo_log_info->cat[i].enabled;
318 cat->loglevel = osmo_log_info->cat[i].loglevel;
321 /* global settings */
322 target->use_color = 1;
323 target->print_timestamp = 0;
325 /* global log level */
326 target->loglevel = 0;
330 struct log_target *log_target_create_stderr(void)
332 /* since C89/C99 says stderr is a macro, we can safely do this! */
334 struct log_target *target;
336 target = log_target_create();
340 target->tgt_file.out = stderr;
341 target->output = _file_output;
348 struct log_target *log_target_create_file(const char *fname)
350 struct log_target *target;
352 target = log_target_create();
356 target->tgt_file.out = fopen(fname, "a");
357 if (!target->tgt_file.out)
360 target->output = _file_output;
362 target->tgt_file.fname = talloc_strdup(target, fname);
367 void log_target_destroy(struct log_target *target)
370 /* just in case, to make sure we don't have any references */
371 log_del_target(target);
373 if (target->output == &_file_output) {
374 /* since C89/C99 says stderr is a macro, we can safely do this! */
376 /* don't close stderr */
377 if (target->tgt_file.out != stderr)
380 fclose(target->tgt_file.out);
381 target->tgt_file.out = NULL;
388 /* close and re-open a log file (for log file rotation) */
389 int log_target_file_reopen(struct log_target *target)
391 fclose(target->tgt_file.out);
393 target->tgt_file.out = fopen(target->tgt_file.fname, "a");
394 if (!target->tgt_file.out)
397 /* we assume target->output already to be set */
402 const char *log_vty_level_string(struct log_info *info)
404 const struct value_string *vs;
405 unsigned int len = 3; /* ()\0 */
408 for (vs = loglevel_strs; vs->value || vs->str; vs++)
409 len += strlen(vs->str) + 1;
411 str = talloc_zero_size(NULL, len);
416 for (vs = loglevel_strs; vs->value || vs->str; vs++) {
417 strcat(str, vs->str);
420 str[strlen(str)-1] = ')';
425 const char *log_vty_category_string(struct log_info *info)
427 unsigned int len = 3; /* "()\0" */
431 for (i = 0; i < info->num_cat; i++)
432 len += strlen(info->cat[i].name) + 1;
434 str = talloc_zero_size(NULL, len);
439 for (i = 0; i < info->num_cat; i++) {
440 strcat(str, info->cat[i].name+1);
443 str[strlen(str)-1] = ')';
448 void log_init(const struct log_info *cat)
450 tall_log_ctx = talloc_named_const(NULL, 1, "logging");