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] =
51 static void log_printfv(enum log_levels level, const char *file, int line, const char *function, const char *format, va_list args)
56 vsnprintf(buffer, 512, format, args);
58 if (level == LOG_OUTPUT)
60 /* do not prepend any headers, just print out what we were given and return */
61 fputs(buffer, log_output);
66 char *f = strrchr(file, '/');
70 if (debug_level >= LOG_DEBUG)
72 /* print with count and time information */
73 int t=(int)(time(NULL)-start);
74 fprintf(log_output, "%s %d %d %s:%d %s(): %s\n", log_strings[level+1], count, t, file, line, function, buffer);
78 /* do not print count and time */
79 fprintf(log_output, "%s %s:%d %s(): %s\n", log_strings[level+1], file, line, function, buffer);
84 /* Never forward LOG_DEBUG, too verbose and they can be found in the log if need be */
85 if (level <= LOG_INFO)
87 for (cb = log_callbacks; cb; cb = cb->next)
89 cb->fn(cb->priv, file, line, function, format, args);
94 void log_printf(enum log_levels level, const char *file, int line, const char *function, const char *format, ...)
97 if (level > debug_level)
101 va_start(args, format);
102 log_printfv(level, file, line, function, format, args);
107 void log_printfnl(enum log_levels level, const char *file, int line, const char *function, const char *format, ...)
110 if (level > debug_level)
113 char *t=malloc(strlen(format)+2);
118 va_start(args, format);
119 log_printfv(level, file, line, function, t, args);
123 /* change the current debug level on the fly
126 * 2: + INFORMATIONAL MSGS
129 int handle_debug_level_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
132 command_print(cmd_ctx, "debug_level: %i", debug_level);
135 debug_level = strtoul(args[0], NULL, 0);
146 int handle_log_output_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
150 FILE* file = fopen(args[0], "w");
161 int log_register_commands(struct command_context_s *cmd_ctx)
164 register_command(cmd_ctx, NULL, "log_output", handle_log_output_command,
165 COMMAND_ANY, "redirect logging to <file> (default: stderr)");
166 register_command(cmd_ctx, NULL, "debug_level", handle_debug_level_command,
167 COMMAND_ANY, "adjust debug level <0-3>");
172 int log_init(struct command_context_s *cmd_ctx)
174 /* set defaults for daemon configuration, if not set by cmdline or cfgfile */
175 if (debug_level == -1)
176 debug_level = LOG_INFO;
178 if (log_output == NULL)
186 int set_log_output(struct command_context_s *cmd_ctx, FILE *output)
192 /* add/remove log callback handler */
193 int log_add_callback(log_callback_fn fn, void *priv)
197 /* prevent the same callback to be registered more than once, just for sure */
198 for (cb = log_callbacks; cb; cb = cb->next)
200 if (cb->fn == fn && cb->priv == priv)
201 return ERROR_INVALID_ARGUMENTS;
204 /* alloc memory, it is safe just to return in case of an error, no need for the caller to check this */
205 if ((cb = malloc(sizeof(log_callback_t))) == NULL)
206 return ERROR_BUF_TOO_SMALL;
208 /* add item to the beginning of the linked list */
211 cb->next = log_callbacks;
217 int log_remove_callback(log_callback_fn fn, void *priv)
219 log_callback_t *cb, **p;
221 for (p = &log_callbacks; (cb = *p); p = &(*p)->next)
223 if (cb->fn == fn && cb->priv == priv)
232 return ERROR_INVALID_ARGUMENTS;
235 /* return allocated string w/printf() result */
236 char *alloc_printf(const char *fmt, va_list ap)
240 /* start by 0 to exercise all the code paths. Need minimum 2 bytes to
241 * fit 1 char and 0 terminator. */
246 if ((string == NULL) || (!first))
250 string = realloc(string, size);
260 ret = vsnprintf(string, size, fmt, ap);
261 /* NB! The result of the vsnprintf() might be an *EMPTY* string! */
262 if ((ret >= 0) && ((ret + 1) < size))
266 /* there was just enough or not enough space, allocate more. */