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-rw-r--r--libosmocore/src/logging.c345
1 files changed, 345 insertions, 0 deletions
diff --git a/libosmocore/src/logging.c b/libosmocore/src/logging.c
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+++ b/libosmocore/src/logging.c
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+/* Debugging/Logging support code */
+
+/* (C) 2008-2010 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2008 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <strings.h>
+#include <time.h>
+#include <errno.h>
+
+#include <osmocore/talloc.h>
+#include <osmocore/utils.h>
+#include <osmocore/logging.h>
+
+static const struct log_info *log_info;
+
+static struct log_context log_context;
+static void *tall_log_ctx = NULL;
+static LLIST_HEAD(target_list);
+
+static const struct value_string loglevel_strs[] = {
+ { 0, "EVERYTHING" },
+ { LOGL_DEBUG, "DEBUG" },
+ { LOGL_INFO, "INFO" },
+ { LOGL_NOTICE, "NOTICE" },
+ { LOGL_ERROR, "ERROR" },
+ { LOGL_FATAL, "FATAL" },
+ { 0, NULL },
+};
+
+int log_parse_level(const char *lvl)
+{
+ return get_string_value(loglevel_strs, lvl);
+}
+
+int log_parse_category(const char *category)
+{
+ int i;
+
+ for (i = 0; i < log_info->num_cat; ++i) {
+ if (!strcasecmp(log_info->cat[i].name+1, category))
+ return i;
+ }
+
+ return -EINVAL;
+}
+
+/*
+ * Parse the category mask.
+ * The format can be this: category1:category2:category3
+ * or category1,2:category2,3:...
+ */
+void log_parse_category_mask(struct log_target* target, const char *_mask)
+{
+ int i = 0;
+ char *mask = strdup(_mask);
+ char *category_token = NULL;
+
+ /* Disable everything to enable it afterwards */
+ for (i = 0; i < ARRAY_SIZE(target->categories); ++i)
+ target->categories[i].enabled = 0;
+
+ category_token = strtok(mask, ":");
+ do {
+ for (i = 0; i < log_info->num_cat; ++i) {
+ char* colon = strstr(category_token, ",");
+ int length = strlen(category_token);
+
+ if (colon)
+ length = colon - category_token;
+
+ if (strncasecmp(log_info->cat[i].name, category_token,
+ length) == 0) {
+ int level = 0;
+
+ if (colon)
+ level = atoi(colon+1);
+
+ target->categories[i].enabled = 1;
+ target->categories[i].loglevel = level;
+ }
+ }
+ } while ((category_token = strtok(NULL, ":")));
+
+ free(mask);
+}
+
+static const char* color(int subsys)
+{
+ if (subsys < log_info->num_cat)
+ return log_info->cat[subsys].color;
+
+ return NULL;
+}
+
+static void _output(struct log_target *target, unsigned int subsys,
+ char *file, int line, int cont, const char *format,
+ va_list ap)
+{
+ char col[30];
+ char sub[30];
+ char tim[30];
+ char buf[4096];
+ char final[4096];
+
+ /* prepare the data */
+ col[0] = '\0';
+ sub[0] = '\0';
+ tim[0] = '\0';
+ buf[0] = '\0';
+
+ /* are we using color */
+ if (target->use_color) {
+ const char *c = color(subsys);
+ if (c) {
+ snprintf(col, sizeof(col), "%s", color(subsys));
+ col[sizeof(col)-1] = '\0';
+ }
+ }
+ vsnprintf(buf, sizeof(buf), format, ap);
+ buf[sizeof(buf)-1] = '\0';
+
+ if (!cont) {
+ if (target->print_timestamp) {
+ char *timestr;
+ time_t tm;
+ tm = time(NULL);
+ timestr = ctime(&tm);
+ timestr[strlen(timestr)-1] = '\0';
+ snprintf(tim, sizeof(tim), "%s ", timestr);
+ tim[sizeof(tim)-1] = '\0';
+ }
+ snprintf(sub, sizeof(sub), "<%4.4x> %s:%d ", subsys, file, line);
+ sub[sizeof(sub)-1] = '\0';
+ }
+
+ snprintf(final, sizeof(final), "%s%s%s%s\033[0;m", col, tim, sub, buf);
+ final[sizeof(final)-1] = '\0';
+ target->output(target, final);
+}
+
+
+static void _logp(unsigned int subsys, int level, char *file, int line,
+ int cont, const char *format, va_list ap)
+{
+ struct log_target *tar;
+
+ llist_for_each_entry(tar, &target_list, entry) {
+ struct log_category *category;
+ int output = 0;
+
+ category = &tar->categories[subsys];
+ /* subsystem is not supposed to be logged */
+ if (!category->enabled)
+ continue;
+
+ /* Check the global log level */
+ if (tar->loglevel != 0 && level < tar->loglevel)
+ continue;
+
+ /* Check the category log level */
+ if (tar->loglevel == 0 && category->loglevel != 0 &&
+ level < category->loglevel)
+ continue;
+
+ /* Apply filters here... if that becomes messy we will
+ * need to put filters in a list and each filter will
+ * say stop, continue, output */
+ if ((tar->filter_map & LOG_FILTER_ALL) != 0)
+ output = 1;
+ else if (log_info->filter_fn)
+ output = log_info->filter_fn(&log_context,
+ tar);
+
+ if (output) {
+ /* FIXME: copying the va_list is an ugly
+ * workaround against a bug hidden somewhere in
+ * _output. If we do not copy here, the first
+ * call to _output() will corrupt the va_list
+ * contents, and any further _output() calls
+ * with the same va_list will segfault */
+ va_list bp;
+ va_copy(bp, ap);
+ _output(tar, subsys, file, line, cont, format, bp);
+ va_end(bp);
+ }
+ }
+}
+
+void logp(unsigned int subsys, char *file, int line, int cont,
+ const char *format, ...)
+{
+ va_list ap;
+
+ va_start(ap, format);
+ _logp(subsys, LOGL_DEBUG, file, line, cont, format, ap);
+ va_end(ap);
+}
+
+void logp2(unsigned int subsys, unsigned int level, char *file, int line, int cont, const char *format, ...)
+{
+ va_list ap;
+
+ va_start(ap, format);
+ _logp(subsys, level, file, line, cont, format, ap);
+ va_end(ap);
+}
+
+static char hexd_buff[4096];
+
+char *hexdump(const unsigned char *buf, int len)
+{
+ int i;
+ char *cur = hexd_buff;
+
+ hexd_buff[0] = 0;
+ for (i = 0; i < len; i++) {
+ int len_remain = sizeof(hexd_buff) - (cur - hexd_buff);
+ int rc = snprintf(cur, len_remain, "%02x ", buf[i]);
+ if (rc <= 0)
+ break;
+ cur += rc;
+ }
+ hexd_buff[sizeof(hexd_buff)-1] = 0;
+ return hexd_buff;
+}
+
+void log_add_target(struct log_target *target)
+{
+ llist_add_tail(&target->entry, &target_list);
+}
+
+void log_del_target(struct log_target *target)
+{
+ llist_del(&target->entry);
+}
+
+void log_reset_context(void)
+{
+ memset(&log_context, 0, sizeof(log_context));
+}
+
+int log_set_context(uint8_t ctx_nr, void *value)
+{
+ if (ctx_nr > LOG_MAX_CTX)
+ return -EINVAL;
+
+ log_context.ctx[ctx_nr] = value;
+
+ return 0;
+}
+
+void log_set_all_filter(struct log_target *target, int all)
+{
+ if (all)
+ target->filter_map |= LOG_FILTER_ALL;
+ else
+ target->filter_map &= ~LOG_FILTER_ALL;
+}
+
+void log_set_use_color(struct log_target *target, int use_color)
+{
+ target->use_color = use_color;
+}
+
+void log_set_print_timestamp(struct log_target *target, int print_timestamp)
+{
+ target->print_timestamp = print_timestamp;
+}
+
+void log_set_log_level(struct log_target *target, int log_level)
+{
+ target->loglevel = log_level;
+}
+
+void log_set_category_filter(struct log_target *target, int category,
+ int enable, int level)
+{
+ if (category >= log_info->num_cat)
+ return;
+ target->categories[category].enabled = !!enable;
+ target->categories[category].loglevel = level;
+}
+
+static void _stderr_output(struct log_target *target, const char *log)
+{
+ fprintf(target->tgt_stdout.out, "%s", log);
+ fflush(target->tgt_stdout.out);
+}
+
+struct log_target *log_target_create(void)
+{
+ struct log_target *target;
+
+ target = talloc_zero(tall_log_ctx, struct log_target);
+ if (!target)
+ return NULL;
+
+ INIT_LLIST_HEAD(&target->entry);
+ memcpy(target->categories, log_info->cat,
+ sizeof(struct log_category)*log_info->num_cat);
+ target->use_color = 1;
+ target->print_timestamp = 0;
+ target->loglevel = 0;
+ return target;
+}
+
+struct log_target *log_target_create_stderr(void)
+{
+ struct log_target *target;
+
+ target = log_target_create();
+ if (!target)
+ return NULL;
+
+ target->tgt_stdout.out = stderr;
+ target->output = _stderr_output;
+ return target;
+}
+
+void log_init(const struct log_info *cat)
+{
+ tall_log_ctx = talloc_named_const(NULL, 1, "logging");
+ log_info = cat;
+}