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/*
* Copyright (C) 2002 - 2004 Tomasz Kojm <tkojm@clamav.net>
*
* This program 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; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
#include <sys/stat.h>
#include <errno.h>
#include <sys/time.h>
#include <sys/socket.h>
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if defined(USE_SYSLOG) && !defined(C_AIX)
#include <syslog.h>
#endif
#include "output.h"
#include "memory.h"
#ifdef CL_THREAD_SAFE
#include <pthread.h>
pthread_mutex_t logg_mutex = PTHREAD_MUTEX_INITIALIZER;
#endif
FILE *logg_fd = NULL;
short int logg_verbose = 0, logg_lock = 0, logg_time = 0;
int logg_size = 0;
const char *logg_file = NULL;
#if defined(USE_SYSLOG) && !defined(C_AIX)
short logg_syslog = 0;
#endif
short int mprintf_disabled = 0, mprintf_verbose = 0, mprintf_quiet = 0,
mprintf_stdout = 0;
int mdprintf(int desc, const char *str, ...)
{
va_list args;
char buff[512];
int bytes;
va_start(args, str);
bytes = vsnprintf(buff, 512, str, args);
va_end(args);
write(desc, buff, bytes);
return bytes;
}
void logg_close(void) {
#ifdef CL_THREAD_SAFE
pthread_mutex_lock(&logg_mutex);
#endif
if (logg_fd) {
fclose(logg_fd);
logg_fd = NULL;
}
#ifdef CL_THREAD_SAFE
pthread_mutex_unlock(&logg_mutex);
#endif
#if defined(USE_SYSLOG) && !defined(C_AIX)
if(logg_syslog) {
closelog();
}
#endif
}
int logg(const char *str, ...)
{
va_list args;
struct flock fl;
char *pt, *timestr, vbuff[1025];
time_t currtime;
struct stat sb;
mode_t old_umask;
va_start(args, str);
if(logg_file) {
#ifdef CL_THREAD_SAFE
pthread_mutex_lock(&logg_mutex);
#endif
if(!logg_fd) {
old_umask = umask(0037);
if((logg_fd = fopen(logg_file, "a")) == NULL) {
umask(old_umask);
#ifdef CL_THREAD_SAFE
pthread_mutex_unlock(&logg_mutex);
#endif
printf("ERROR: Can't open %s in append mode.\n", logg_file);
return -1;
} else umask(old_umask);
if(logg_lock) {
memset(&fl, 0, sizeof(fl));
fl.l_type = F_WRLCK;
if(fcntl(fileno(logg_fd), F_SETLK, &fl) == -1) {
#ifdef CL_THREAD_SAFE
pthread_mutex_unlock(&logg_mutex);
#endif
return -1;
}
}
}
/* Need to avoid logging time for verbose messages when logverbose
is not set or we get a bunch of timestamps in the log without
newlines... */
if(logg_time && ((*str != '*') || logg_verbose)) {
time(&currtime);
pt = ctime(&currtime);
timestr = mcalloc(strlen(pt), sizeof(char));
strncpy(timestr, pt, strlen(pt) - 1);
fprintf(logg_fd, "%s -> ", timestr);
free(timestr);
}
if(logg_size) {
if(stat(logg_file, &sb) != -1) {
if(sb.st_size > logg_size) {
logg_file = NULL;
fprintf(logg_fd, "Log size = %d, maximal = %d\n", (int) sb.st_size, logg_size);
fprintf(logg_fd, "LOGGING DISABLED (Maximal log file size exceeded).\n");
fclose(logg_fd);
logg_fd = NULL;
#ifdef CL_THREAD_SAFE
pthread_mutex_unlock(&logg_mutex);
#endif
return 0;
}
}
}
if(*str == '!') {
fprintf(logg_fd, "ERROR: ");
vfprintf(logg_fd, str + 1, args);
} else if(*str == '^') {
fprintf(logg_fd, "WARNING: ");
vfprintf(logg_fd, str + 1, args);
} else if(*str == '*') {
if(logg_verbose)
vfprintf(logg_fd, str + 1, args);
} else vfprintf(logg_fd, str, args);
fflush(logg_fd);
#ifdef CL_THREAD_SAFE
pthread_mutex_unlock(&logg_mutex);
#endif
}
#if defined(USE_SYSLOG) && !defined(C_AIX)
if(logg_syslog) {
/* due to a problem with superfluous control characters (which
* vsnprintf() handles correctly) in (v)syslog we have to remove
* them in a final string
*
* FIXME: substitute %% instead of _
*/
vsnprintf(vbuff, 1024, str, args);
vbuff[1024] = 0;
while((pt = strchr(vbuff, '%')))
*pt = '_';
if(vbuff[0] == '!') {
syslog(LOG_ERR, vbuff + 1);
} else if(vbuff[0] == '^') {
syslog(LOG_WARNING, vbuff + 1);
} else if(vbuff[0] == '*') {
if(logg_verbose) {
syslog(LOG_DEBUG, vbuff + 1);
}
} else syslog(LOG_INFO, vbuff);
}
#endif
va_end(args);
return 0;
}
void mprintf(const char *str, ...)
{
va_list args;
FILE *fd;
char logbuf[512];
if(mprintf_disabled) {
if(*str == '@') {
va_start(args, str);
#ifdef NO_SNPRINTF
vsprintf(logbuf, ++str, args);
#else
vsnprintf(logbuf, sizeof(logbuf), ++str, args);
#endif
va_end(args);
logg("ERROR: %s", logbuf);
}
return;
}
if(mprintf_stdout)
fd = stdout;
else
fd = stderr;
/* legend:
* ! - error
* @ - error with logging
* ...
*/
/*
* ERROR WARNING STANDARD
* normal yes yes yes
*
* verbose yes yes yes
*
* quiet yes no no
*/
va_start(args, str);
if(*str == '!') {
fprintf(fd, "ERROR: ");
vfprintf(fd, ++str, args);
} else if(*str == '@') {
fprintf(fd, "ERROR: ");
vfprintf(fd, ++str, args);
#ifdef NO_SNPRINTF
vsprintf(logbuf, str, args);
#else
vsnprintf(logbuf, sizeof(logbuf), str, args);
#endif
logg("ERROR: %s", logbuf);
} else if(!mprintf_quiet) {
if(*str == '^') {
fprintf(fd, "WARNING: ");
vfprintf(fd, ++str, args);
} else if(*str == '*') {
if(mprintf_verbose)
vfprintf(fd, ++str, args);
} else vfprintf(fd, str, args);
}
va_end(args);
if(fd == stdout)
fflush(stdout);
}
struct facstruct {
const char *name;
int code;
};
#if defined(USE_SYSLOG) && !defined(C_AIX)
static const struct facstruct facilitymap[] = {
#ifdef LOG_AUTH
{ "LOG_AUTH", LOG_AUTH },
#endif
#ifdef LOG_AUTHPRIV
{ "LOG_AUTHPRIV", LOG_AUTHPRIV },
#endif
#ifdef LOG_CRON
{ "LOG_CRON", LOG_CRON },
#endif
#ifdef LOG_DAEMON
{ "LOG_DAEMON", LOG_DAEMON },
#endif
#ifdef LOG_FTP
{ "LOG_FTP", LOG_FTP },
#endif
#ifdef LOG_KERN
{ "LOG_KERN", LOG_KERN },
#endif
#ifdef LOG_LPR
{ "LOG_LPR", LOG_LPR },
#endif
#ifdef LOG_MAIL
{ "LOG_MAIL", LOG_MAIL },
#endif
#ifdef LOG_NEWS
{ "LOG_NEWS", LOG_NEWS },
#endif
#ifdef LOG_AUTH
{ "LOG_AUTH", LOG_AUTH },
#endif
#ifdef LOG_SYSLOG
{ "LOG_SYSLOG", LOG_SYSLOG },
#endif
#ifdef LOG_USER
{ "LOG_USER", LOG_USER },
#endif
#ifdef LOG_UUCP
{ "LOG_UUCP", LOG_UUCP },
#endif
#ifdef LOG_LOCAL0
{ "LOG_LOCAL0", LOG_LOCAL0 },
#endif
#ifdef LOG_LOCAL1
{ "LOG_LOCAL1", LOG_LOCAL1 },
#endif
#ifdef LOG_LOCAL2
{ "LOG_LOCAL2", LOG_LOCAL2 },
#endif
#ifdef LOG_LOCAL3
{ "LOG_LOCAL3", LOG_LOCAL3 },
#endif
#ifdef LOG_LOCAL4
{ "LOG_LOCAL4", LOG_LOCAL4 },
#endif
#ifdef LOG_LOCAL5
{ "LOG_LOCAL5", LOG_LOCAL5 },
#endif
#ifdef LOG_LOCAL6
{ "LOG_LOCAL6", LOG_LOCAL6 },
#endif
#ifdef LOG_LOCAL7
{ "LOG_LOCAL7", LOG_LOCAL7 },
#endif
{ NULL, -1 }
};
int logg_facility(const char *name)
{
int i;
for(i = 0; facilitymap[i].name; i++)
if(!strcmp(facilitymap[i].name, name))
return facilitymap[i].code;
return -1;
}
#endif
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