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/* Copyright 2001,2002 Roger Dingledine, Matej Pfajfar. */
/* See LICENSE for licensing information */
/* $Id$ */
#include "../or/or.h"
#include "util.h"
struct logfile_t;
typedef struct logfile_t {
struct logfile_t *next;
const char *filename;
FILE *file;
int needs_close;
int loglevel;
int max_loglevel;
} logfile_t;
static INLINE const char *sev_to_string(int severity) {
switch(severity) {
case LOG_DEBUG: return "debug";
case LOG_INFO: return "info";
case LOG_WARNING: return "warn";
case LOG_ERR: return "err";
default: assert(0); return "UNKNOWN";
}
}
static int loglevel = LOG_DEBUG;
static logfile_t *logfiles = NULL;
/* Format a log message into a fixed-sized buffer. (This is factored out
* of 'logv' so that we never format a message more than once.
*/
static INLINE void format_msg(char *buf, size_t buf_len,
int severity, const char *funcname,
const char *format, va_list ap)
{
time_t t;
struct timeval now;
int n;
buf_len -= 2; /* subtract 2 characters so we have room for \n\0 */
my_gettimeofday(&now);
t = (time_t)now.tv_sec;
n = strftime(buf, buf_len, "%b %d %H:%M:%S", localtime(&t));
n += snprintf(buf+n, buf_len-n,
".%.3ld [%s] ",
(long)now.tv_usec / 1000, sev_to_string(severity));
if(n > buf_len)
n = buf_len-1; /* the *nprintf funcs return how many bytes they
* _would_ print, if the output is truncated.
* Subtract one because the count doesn't include the \0 */
if (funcname) {
n += snprintf(buf+n, buf_len-n, "%s(): ", funcname);
if(n > buf_len)
n = buf_len-1;
}
n += vsnprintf(buf+n,buf_len-n,format,ap);
if(n > buf_len)
n = buf_len-1;
buf[n]='\n';
buf[n+1]='\0';
}
static void
logv(int severity, const char *funcname, const char *format, va_list ap)
{
char buf[1024];
int formatted = 0;
logfile_t *lf;
assert(format);
if (severity < loglevel)
return;
if (!logfiles) {
/* XXX This is a temporary measure until we get configuration support
for logfiles. */
add_stream_log(loglevel, "<stdout>", stdout);
}
for (lf = logfiles; lf; lf = lf->next) {
if (severity < lf->loglevel || severity > lf->max_loglevel)
continue;
if (!lf->file)
continue;
if (!formatted) {
format_msg(buf, 1024, severity, funcname, format, ap);
formatted = 1;
}
fputs(buf, lf->file);
/* XXX check for EOF */
}
}
void
log_set_severity(int severity)
{
loglevel = severity;
}
/* Outputs a message to stdout */
void log(int severity, const char *format, ...)
{
va_list ap;
va_start(ap,format);
logv(severity, NULL, format, ap);
va_end(ap);
}
void _log_fn(int severity, const char *fn, const char *format, ...)
{
va_list ap;
va_start(ap,format);
logv(severity, fn, format, ap);
va_end(ap);
}
void close_logs()
{
logfile_t *next, *lf;
for (lf = logfiles; lf; lf = lf->next) {
if (lf->needs_close)
fclose(lf->file);
next = lf->next;
free(lf);
}
logfiles = NULL;
}
void reset_logs()
{
logfile_t *lf;
for (lf = logfiles; lf; lf = lf->next) {
if (lf->needs_close) {
fclose(lf->file);
lf->file = fopen(lf->filename, "a");
}
}
}
void add_stream_log(int loglevel, const char *name, FILE *stream)
{
logfile_t *lf;
lf = tor_malloc(sizeof(logfile_t));
lf->filename = name;
lf->needs_close = 0;
lf->loglevel = loglevel;
lf->max_loglevel = LOG_EMERG;
lf->file = stream;
lf->next = logfiles;
logfiles = lf;
}
void add_file_log(int loglevel, const char *filename)
{
FILE *f;
f = fopen(filename, "a");
if (!f) return;
add_stream_log(loglevel, filename, f);
logfiles->needs_close = 1;
}
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