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/* -*- 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 <mbp@samba.org>
*
* 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;
}
}
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