log.c

#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <sys/time.h>
#include <unistd.h>
#ifdef HAVE_VSYSLOG
#include <syslog.h>
#endif

#include "log.h"

static int logLevel = MESS_DEBUG;
static FILE *messageFile = NULL;
static int _logToSyslog = 0;

void logSetLevel(int level)
{
    logLevel = level;
}

void logSetMessageFile(FILE * f)
{
    messageFile = f;
}

void logToSyslog(int enable) {
    _logToSyslog = enable;

#ifdef HAVE_VSYSLOG
    if (_logToSyslog) {
        openlog("logrotate", 0, LOG_USER);
    }
    else {
        closelog();
    }
#endif
}

__attribute__((format (printf, 3, 0)))
static void log_once(FILE *where, int level, const char *format, va_list args)
{
    switch (level) {
        case MESS_DEBUG:
        case MESS_NORMAL:
        case MESS_VERBOSE:
            break;
        default:
            fprintf(where, "error: ");
            break;
    }

    vfprintf(where, format, args);
    fflush(where);
}

__attribute__((format (printf, 2, 3)))
void message(int level, const char *format, ...)
{
    va_list args;

    if (level >= logLevel) {
        va_start(args, format);
        log_once(stderr, level, format, args);
        va_end(args);
    }

    if (messageFile != NULL) {
        va_start(args, format);
        log_once(messageFile, level, format, args);
        va_end(args);
    }

#ifdef HAVE_VSYSLOG
    if (_logToSyslog) {
        int priority = LOG_USER;

        switch(level) {
            case MESS_REALDEBUG:
                priority |= LOG_DEBUG;
                break;
            case MESS_DEBUG:
            case MESS_VERBOSE:
            case MESS_NORMAL:
                priority |= LOG_INFO;
                break;
            case MESS_ERROR:
                priority |= LOG_ERR;
                break;
            case MESS_FATAL:
                priority |= LOG_CRIT;
                break;
            default:
                priority |= LOG_INFO;
                break;
        }

        va_start(args, format);
        vsyslog(priority, format, args);
        va_end(args);
    }
#endif

    if (level == MESS_FATAL)
        exit(1);
}

/* vim: set et sw=4 ts=4: */