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/*
* logger.c
*
* Logger for motion
*
* Copyright 2005, William M. Brack
* Copyright 2008 by Angel Carpintero (motiondevelop@gmail.com)
* This software is distributed under the GNU Public License Version 2
* See also the file 'COPYING'.
*
*/
#include "logger.h" /* already includes motion.h */
#include <stdarg.h>
static int log_mode = LOGMODE_SYSLOG;
static FILE *logfile;
static unsigned int log_level = LEVEL_DEFAULT;
static unsigned int log_type = TYPE_DEFAULT;
static const char *log_type_str[] = {NULL, "COR", "STR", "ENC", "NET", "DBL", "EVT", "TRK", "VID", "ALL"};
static const char *log_level_str[] = {"EMG", "ALR", "CRT", "ERR", "WRN", "NTC", "INF", "DBG", "ALL", NULL};
/**
* get_log_type
*
*
* Returns: index of log type or 0 if not valid type.
*/
int get_log_type(const char *type)
{
unsigned int i, ret = 0;
unsigned int maxtype = sizeof(log_type_str)/sizeof(const char *);
for (i = 1;i < maxtype; i++) {
if (!strncasecmp(type, log_type_str[i], 3)) {
ret = i;
break;
}
}
return ret;
}
/**
* get_log_type_str
* Gets string value for type log level.
*
* Returns: name of type log level.
*/
const char* get_log_type_str(unsigned int type)
{
return log_type_str[type];
}
/**
* set_log_type
* Sets log type level.
*
* Returns: nothing.
*/
void set_log_type(unsigned int type)
{
log_type = type;
//printf("set log type %d\n", type);
}
/**
* get_log_level_str
* Gets string value for log level.
*
* Returns: name of log level.
*/
const char* get_log_level_str(unsigned int level)
{
return log_level_str[level];
}
/**
* set_log_level
* Sets log level.
*
* Returns nothing.
*/
void set_log_level(unsigned int level)
{
log_level = level;
//printf("set log level %d\n", level);
}
/**
* set_log_mode
* Sets mode of logging, could be using syslog or files.
*
* Returns: nothing.
*/
void set_log_mode(int mode)
{
int prev_mode = log_mode;
log_mode = mode;
//printf("set log mode %d\n", mode);
if (mode == LOGMODE_SYSLOG && prev_mode != LOGMODE_SYSLOG)
openlog("motion", LOG_PID, LOG_USER);
if (mode != LOGMODE_SYSLOG && prev_mode == LOGMODE_SYSLOG)
closelog();
}
/**
* set_logfile
* Sets logfile to be used instead of syslog.
*
* Returns: pointer to log file.
*/
FILE * set_logfile(const char *logfile_name)
{
/* Setup temporary to let log if myfopen fails */
set_log_mode(LOGMODE_SYSLOG);
logfile = myfopen(logfile_name, "a");
/* If logfile was opened correctly */
if (logfile)
set_log_mode(LOGMODE_FILE);
return logfile;
}
/**
* str_time
*
* Return: string with human readable time
*/
static char *str_time(void)
{
static char buffer[16];
time_t now = 0;
now = time(0);
strftime(buffer, 16, "%b %d %H:%M:%S", localtime(&now));
return buffer;
}
/**
* MOTION_LOG
*
* This routine is used for printing all informational, debug or error
* messages produced by any of the other motion functions. It always
* produces a message of the form "[n] {message}", and (if the param
* 'errno_flag' is set) follows the message with the associated error
* message from the library.
*
* Parameters:
*
* level logging level for the 'syslog' function
*
* type logging type.
*
* errno_flag if set, the log message should be followed by the
* error message.
* fmt the format string for producing the message
* ap variable-length argument list
*
* Returns:
* Nothing
*/
void motion_log(int level, unsigned int type, int errno_flag, const char *fmt, ...)
{
int errno_save, n;
char buf[1024];
/* GNU-specific strerror_r() */
#if (!defined(XSI_STRERROR_R))
char msg_buf[100];
#endif
va_list ap;
int threadnr;
static int flood_cnt = 0;
static char flood_msg[1024];
char flood_repeats[1024];
/* Exit if level is greater than log_level */
if ((unsigned int)level > log_level)
return;
/* Exit if type is not equal to log_type and not TYPE_ALL */
if ((log_type != TYPE_ALL) && (type != log_type))
return;
//printf("log_type %d, type %d level %d\n", log_type, type, level);
/*
* If pthread_getspecific fails (e.g., because the thread's TLS doesn't
* contain anything for thread number, it returns NULL which casts to zero,
* which is nice because that's what we want in that case.
*/
threadnr = (unsigned long)pthread_getspecific(tls_key_threadnr);
/*
* First we save the current 'error' value. This is required because
* the subsequent calls to vsnprintf could conceivably change it!
*/
errno_save = errno;
char threadname[32];
util_threadname_get(threadname);
/*
* Prefix the message with the thread number and name,
* log level string, log type string, and time.
* e.g. [1:enc] [ERR] [ALL] [Apr 03 00:08:44] blah
*/
if (log_mode == LOGMODE_FILE) {
n = snprintf(buf, sizeof(buf), "[%d:%s] [%s] [%s] [%s] ",
threadnr, threadname, get_log_level_str(level), get_log_type_str(type),
str_time());
} else {
/*
* Prefix the message with the thread number and name,
* log level string and log type string.
* e.g. [1:trk] [DBG] [ALL] blah
*/
n = snprintf(buf, sizeof(buf), "[%d:%s] [%s] [%s] ",
threadnr, threadname, get_log_level_str(level), get_log_type_str(type));
}
/* Next add the user's message. */
va_start(ap, fmt);
n += vsnprintf(buf + n, sizeof(buf) - n, fmt, ap);
va_end(ap);
buf[1023] = '\0';
/* If errno_flag is set, add on the library error message. */
if (errno_flag) {
size_t buf_len = strlen(buf);
// just knock off 10 characters if we're that close...
if (buf_len + 10 > 1024) {
buf[1024 - 10] = '\0';
buf_len = 1024 - 10;
}
strncat(buf, ": ", 1024 - buf_len);
n += 2;
/*
* This is bad - apparently gcc/libc wants to use the non-standard GNU
* version of strerror_r, which doesn't actually put the message into
* my buffer :-(. I have put in a 'hack' to get around this.
*/
#if defined(XSI_STRERROR_R)
/* XSI-compliant strerror_r() */
strerror_r(errno_save, buf + n, sizeof(buf) - n); /* 2 for the ': ' */
#else
/* GNU-specific strerror_r() */
strncat(buf, strerror_r(errno_save, msg_buf, sizeof(msg_buf)), 1024 - strlen(buf));
#endif
}
if ((!strcmp(buf,flood_msg)) && (flood_cnt <= 5000)){
flood_cnt++;
} else {
if (flood_cnt > 1){
snprintf(flood_repeats,1024,"[%d:%s] [%s] [%s] Above message repeats %d times",
threadnr, threadname, get_log_level_str(level)
, get_log_type_str(type), flood_cnt-1);
switch (log_mode) {
case LOGMODE_FILE:
strncat(flood_repeats, "\n", 1024 - strlen(flood_repeats));
fputs(flood_repeats, logfile);
fflush(logfile);
break;
case LOGMODE_SYSLOG:
syslog(level, "%s", flood_repeats);
strncat(flood_repeats, "\n", 1024 - strlen(flood_repeats));
fputs(flood_repeats, stderr);
fflush(stderr);
break;
}
}
flood_cnt = 1;
snprintf(flood_msg,1024,"%s",buf);
switch (log_mode) {
case LOGMODE_FILE:
strncat(buf, "\n", 1024 - strlen(buf));
fputs(buf, logfile);
fflush(logfile);
break;
case LOGMODE_SYSLOG:
syslog(level, "%s", buf);
strncat(buf, "\n", 1024 - strlen(buf));
fputs(buf, stderr);
fflush(stderr);
break;
}
}
}
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