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/*
* Copyright (C) 2009 Red Hat Inc.
*
* This application is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; version 2.
*
* This application is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
/**
* @file log.c
* @author David Sommerseth <davids@redhat.com>
* @date Wed Oct 21 11:38:51 2009
*
* @brief Generic log functions
*
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <assert.h>
#include <stdarg.h>
#include <pthread.h>
#include <syslog.h>
#include <eurephia_nullsafe.h>
#include <log.h>
LogContext *init_log(const char *fname, unsigned int verblvl) {
LogContext *logctx = NULL;
logctx = (LogContext *) calloc(1, sizeof(LogContext)+2);
assert( logctx != NULL);
logctx->logfp = NULL;
logctx->verbosity = verblvl;
if( fname == NULL ) {
logctx->logtype = ltSYSLOG;
openlog("rteval_parserd", LOG_PID, LOG_DAEMON);
} else {
if( strncmp(fname, "syslog:", 7) == 0 ) {
const char *fac = fname+7;
int facid = LOG_DAEMON;
if( strcasecmp(fac, "local0") == 0 ) {
facid = LOG_LOCAL0;
} else if( strcasecmp(fac, "local1") == 0 ) {
facid = LOG_LOCAL1;
} else if( strcasecmp(fac, "local2") == 0 ) {
facid = LOG_LOCAL2;
} else if( strcasecmp(fac, "local3") == 0 ) {
facid = LOG_LOCAL3;
} else if( strcasecmp(fac, "local4") == 0 ) {
facid = LOG_LOCAL4;
} else if( strcasecmp(fac, "local5") == 0 ) {
facid = LOG_LOCAL5;
} else if( strcasecmp(fac, "local6") == 0 ) {
facid = LOG_LOCAL6;
} else if( strcasecmp(fac, "local7") == 0 ) {
facid = LOG_LOCAL7;
} else if( strcasecmp(fac, "user") == 0 ) {
facid = LOG_USER;
}
logctx->logtype = ltSYSLOG;
openlog("rteval_parserd", LOG_PID, facid);
} else if( strcmp(fname, "stderr:") == 0 ) {
logctx->logtype = ltCONSOLE;
logctx->logfp = stderr;
} else if( strcmp(fname, "stdout:") == 0 ) {
logctx->logtype = ltCONSOLE;
logctx->logfp = stdout;
} else {
logctx->logtype = ltFILE;
logctx->logfp = fopen(fname, "a");
if( logctx->logfp == NULL ) {
fprintf(stderr, "** ERROR ** Failed to open log file %s: %s\n",
fname, strerror(errno));
free_nullsafe(logctx);
return NULL;
}
}
}
if( logctx->logtype != ltSYSLOG ) {
static pthread_mutex_t mtx = PTHREAD_MUTEX_INITIALIZER;
logctx->mtx_log = &mtx;
}
return logctx;
}
void close_log(LogContext *lctx) {
if( !lctx ) {
return;
}
switch( lctx->logtype ) {
case ltFILE:
fclose(lctx->logfp);
break;
case ltSYSLOG:
closelog();
break;
case ltCONSOLE:
break;
}
free_nullsafe(lctx);
}
void writelog(LogContext *lctx, unsigned int loglvl, const char *fmt, ... ) {
if( !lctx || !fmt ) {
return;
}
if( lctx->verbosity >= loglvl ) {
va_list ap;
va_start(ap, fmt);
switch( lctx->logtype ) {
case ltSYSLOG:
vsyslog(loglvl, fmt, ap);
break;
case ltCONSOLE:
case ltFILE:
pthread_mutex_lock(lctx->mtx_log);
vfprintf(lctx->logfp, fmt, ap);
pthread_mutex_unlock(lctx->mtx_log);
break;
}
va_end(ap);
}
}
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