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. */
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