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