1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
25 #include "configuration.h"
35 static FILE* log_output;
36 static log_callback_t *log_callbacks = NULL;
40 static char *log_strings[5] =
49 void log_printf(enum log_levels level, const char *file, int line, const char *function, const char *format, ...)
57 if (level > debug_level)
60 va_start(args, format);
61 vsnprintf(buffer, 512, format, args);
64 if (level == LOG_OUTPUT)
66 /* do not prepend any headers, just print out what we were given and return */
67 fputs(buffer, log_output);
72 char *f = strrchr(file, '/');
76 if (debug_level >= LOG_DEBUG)
78 /* print with count and time information */
79 time_t t=time(NULL)-start;
80 fprintf(log_output, "%s %d %ld %s:%d %s(): %s\n", log_strings[level+1], count, t, file, line, function, buffer);
84 /* do not print count and time */
85 fprintf(log_output, "%s %s:%d %s(): %s\n", log_strings[level+1], file, line, function, buffer);
90 /* Never forward LOG_DEBUG, too verbose and they can be found in the log if need be */
91 if (level <= LOG_INFO)
93 for (cb = log_callbacks; cb; cb = cb->next)
95 va_start(args, format);
96 cb->fn(cb->priv, file, line, function, format, args);
102 /* change the current debug level on the fly
105 * 2: + INFORMATIONAL MSGS
108 int handle_debug_level_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
111 command_print(cmd_ctx, "debug_level: %i", debug_level);
114 debug_level = strtoul(args[0], NULL, 0);
125 int handle_log_output_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
129 FILE* file = fopen(args[0], "w");
140 int log_register_commands(struct command_context_s *cmd_ctx)
143 register_command(cmd_ctx, NULL, "log_output", handle_log_output_command,
144 COMMAND_ANY, "redirect logging to <file> (default: stderr)");
145 register_command(cmd_ctx, NULL, "debug_level", handle_debug_level_command,
146 COMMAND_ANY, "adjust debug level <0-3>");
151 int log_init(struct command_context_s *cmd_ctx)
153 /* set defaults for daemon configuration, if not set by cmdline or cfgfile */
154 if (debug_level == -1)
155 debug_level = LOG_INFO;
157 if (log_output == NULL)
165 int set_log_output(struct command_context_s *cmd_ctx, FILE *output)
171 /* add/remove log callback handler */
172 int log_add_callback(log_callback_fn fn, void *priv)
176 /* prevent the same callback to be registered more than once, just for sure */
177 for (cb = log_callbacks; cb; cb = cb->next)
179 if (cb->fn == fn && cb->priv == priv)
180 return ERROR_INVALID_ARGUMENTS;
183 /* alloc memory, it is safe just to return in case of an error, no need for the caller to check this */
184 if ((cb = malloc(sizeof(log_callback_t))) == NULL)
185 return ERROR_BUF_TOO_SMALL;
187 /* add item to the beginning of the linked list */
190 cb->next = log_callbacks;
196 int log_remove_callback(log_callback_fn fn, void *priv)
198 log_callback_t *cb, **p;
200 for (p = &log_callbacks; cb = *p; p = &(*p)->next)
202 if (cb->fn == fn && cb->priv == priv)
211 return ERROR_INVALID_ARGUMENTS;
214 /* return allocated string w/printf() result */
215 char *alloc_printf(const char *fmt, va_list ap)
219 /* start by 0 to exercise all the code paths. Need minimum 2 bytes to
220 * fit 1 char and 0 terminator. */
225 if ((string == NULL) || (!first))
229 string = realloc(string, size);
239 ret = vsnprintf(string, size, fmt, ap);
240 /* NB! The result of the vsnprintf() might be an *EMPTY* string! */
241 if ((ret >= 0) && ((ret + 1) < size))
245 /* there was just enough or not enough space, allocate more. */