log.c File Reference

Logging operations. More...

#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <time.h>
#include "args.h"
#include "defaults.h"
#include "log.h"
#include "peapod.h"

Include dependency graph for log.c:

Macros
#define	DAEMONIZED   2
	Console output disabled. More...
#define	MSGSIZ   1024
	Log message buffer size. More...
#define	TMSIZ   64
	Timestamp buffer size. More...

Functions
static void	log_to_file (const char *msg, int level, FILE *out)
	Log a message to a file or to the console. More...
int	log_init (void)
	Initialize logging. More...
int	log_daemonize (void)
	Prepare logging when daemonizing. More...
void	log_msg (int level, const char *file, int line, const char *fmt,...)
	Log a message. More...

Variables
static FILE *	log_fs = NULL
	Log file. More...
static char	log_buf [MSGSIZ] = { "" }
	Log message buffer. More...
static char	log_tm [TMSIZ] = { "" }
	Timestamp buffer. More...
struct args_t	args
	Program arguments data structure. More...
Log level descriptions
static const char *	levels []
	Five on-screen characters. More...
static const char *	clevels []
	Five colorized on-screen characters. More...

Detailed Description

Logging operations.

Macro Definition Documentation

#define DAEMONIZED   2

Console output disabled.

#define MSGSIZ   1024

Log message buffer size.

#define TMSIZ   64

Timestamp buffer size.

Function Documentation

static void log_to_file ( const char *  msg, int  level, FILE *  out  )

static

Log a message to a file or to the console.

Messages are timestamped if logging to the console. Messages are additionally datestamped if logging to a file.

Parameters

msg	A message to be logged
level	The level of the message
out	File stream of log file, or NULL to emit to the console

Note

level may be the syslog levels (LOG_EMERG to LOG_DEBUG, i.e. 0 to 7), or our own LOG_DEBUGLOW (8).
Output to console emits to stderr if level is below LOG_WARNING, and to stdout otherwise.

int log_init

(

void

)

Initialize logging.

Returns

0 if successful, or -1 if unsuccessful

int log_daemonize

(

void

)

Prepare logging when daemonizing.

Returns

0 if successful, or -1 if unsuccessful

void log_msg	(	int	level,
		const char *	file,
		int	line,
		const char *	fmt,
			...
	)

Log a message.

Depending on the program arguments and the value of level, the same message is emitted to console (stdout/stderr), a log file, and/or syslog.

Parameters

level	The level of the message
file	Ordinarily NULL
line	Ordinarily 0
fmt,...	printf(3)-style format and variable arguments

Note

level may be the syslog levels (LOG_EMERG to LOG_DEBUG, i.e. 0 to 7), or our own LOG_DEBUGLOW (8).
file and line are the __FILE__ and __LINE__ macros, i.e. the source file and the line in the source file of the call to log_msg(). They were used during development only in the lfoo() logging macros defined in log.h.

Variable Documentation

const char* levels[]

static

Initial value:

= {
        "EMERG", "ALERT", "CRIT ",
        "ERROR", "WARN ", "NOTE ",
        "INFO ", "DEBUG", "DBGLO"
}

Five on-screen characters.

Used for emitting logs to syslog or to a log file.

const char* clevels[]

static

Initial value:

= {
        "\x1b[1;4;91mEMERG\x1b[0m",     
        "\x1b[1;4;93mALERT\x1b[0m",     
        "\x1b[1;96mCRIT\x1b[0m ",       
        "\x1b[1;91mERROR\x1b[0m",       
        "\x1b[1;95mWARN\x1b[0m ",       
        "\x1b[1;94mNOTE\x1b[0m ",       
        "\x1b[1;92mINFO\x1b[0m ",       
        "DEBUG",                        
        "DBGLO"
}

Five colorized on-screen characters.

Used for emitting logs to the console (stdout / stderr).

FILE* log_fs = NULL

static

Log file.

char log_buf[MSGSIZ] = { "" }

static

Log message buffer.

char log_tm[TMSIZ] = { "" }

static

Timestamp buffer.

struct args_t args

Program arguments data structure.

Note

Global