/* -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 99; -*- */

/* vim: set ts=4 sw=4 et tw=99: */

/*

* distcc -- A simple distributed compiler system

*

* Copyright (C) 2002, 2003 by Martin Pool <[email protected]>

*

* 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.,

* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

*/

#include "client.h"

#include "logging.h"

using namespace std;

/**

* @file

* @brief Protect against unbounded recursion.

*

* It would be fairly easy for somebody to get confused in masquerade mode and

* try to get distcc to invoke itself in a loop. We can't always work out the

* right thing to do but we can at least flag an error.

*

* This environment variable is set to guard against distcc accidentally

* recursively invoking itself, thinking it's the real compiler.

**/

static const char dcc_safeguard_name[] = "_ICECC_SAFEGUARD";

static int dcc_safeguard_level;

int dcc_recursion_safeguard()

{

const char *env = getenv(dcc_safeguard_name);

if (env) {

//trace() << "safeguard: " << env << endl;

if (!(dcc_safeguard_level = atoi(env))) {

dcc_safeguard_level = 1;

}

} else {

dcc_safeguard_level = 0;

}

//trace() << "safeguard level=" << dcc_safeguard_level << endl;

return dcc_safeguard_level;

}

void dcc_increment_safeguard(SafeguardStep step)

{

char value[2] = { (char)(dcc_safeguard_level + step + '0'), '\0' };

//trace() << "setting safeguard: " << dcc_safeguard_set << endl;

if (setenv(dcc_safeguard_name, value, 1) == -1) {

log_error() << "putenv failed" << endl;

}

}