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/*
This file is part of Icecream.
Copyright (c) 2004 Stephan Kulow <coolo@suse.de>
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <iostream>
#include "logging.h"
#include <fstream>
#include <signal.h>
#ifdef __linux__
#include <dlfcn.h>
#endif
using namespace std;
int debug_level = 0;
ostream *logfile_trace = 0;
ostream *logfile_info = 0;
ostream *logfile_warning = 0;
ostream *logfile_error = 0;
string logfile_prefix;
static ofstream logfile_null( "/dev/null" );
static ofstream logfile_file;
static string logfile_filename;
void reset_debug( int );
void setup_debug(int level, const string &filename, const string& prefix)
{
string fname = filename;
debug_level = level;
logfile_prefix = prefix;
logfile_filename = filename;
if ( logfile_file.is_open() )
logfile_file.close();
ostream *output = 0;
if ( filename.length() ) {
logfile_file.clear();
logfile_file.open( filename.c_str(), fstream::out | fstream::app );
#ifdef __linux__
if (fname[0] != '/') {
char buf[256];
if (getcwd(buf, sizeof(buf))) {
fname.insert(0, "/");
fname.insert(0, buf);
}
}
setenv("SEGFAULT_OUTPUT_NAME", fname.c_str(), false);
#endif
output = &logfile_file;
} else
output = &cerr;
#ifdef __linux__
(void) dlopen("libSegFault.so", RTLD_NOW | RTLD_LOCAL);
#endif
if ( debug_level & Debug )
logfile_trace = output;
else
logfile_trace = &logfile_null;
if ( debug_level & Info )
logfile_info = output;
else
logfile_info = &logfile_null;
if ( debug_level & Warning )
logfile_warning = output;
else
logfile_warning = &logfile_null;
if ( debug_level & Error )
logfile_error = output;
else
logfile_error = &logfile_null;
signal( SIGHUP, reset_debug );
}
void reset_debug( int )
{
setup_debug(debug_level, logfile_filename);
}
void close_debug()
{
if (logfile_null.is_open())
logfile_null.close();
if (logfile_file.is_open())
logfile_file.close();
logfile_trace = logfile_info = logfile_warning = logfile_error = 0;
}
/* Flushes all ostreams used for debug messages. You need to call
this before forking. */
void flush_debug()
{
if (logfile_null.is_open())
logfile_null.flush();
if (logfile_file.is_open())
logfile_file.flush();
}
#ifdef HAVE_BACKTRACE
#include <execinfo.h>
#endif
string get_backtrace() {
string s;
#ifdef HAVE_BACKTRACE
void* trace[256];
int n = backtrace(trace, 256);
if (!n)
return s;
char** strings = backtrace_symbols (trace, n);
s = "[\n";
for (int i = 0; i < n; ++i) {
s += ": ";
s += strings[i];
s += "\n";
}
s += "]\n";
if (strings)
free (strings);
#endif
return s;
}
unsigned log_block::nesting;
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