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/* -*- c-file-style: "java"; indent-tabs-mode: nil; fill-column: 78 -*-
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#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 char dcc_safeguard_set[] = "_ICECC_SAFEGUARD=1";
static int dcc_safeguard_level;
int dcc_recursion_safeguard(void)
{
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(void)
{
if (dcc_safeguard_level > 0)
dcc_safeguard_set[sizeof dcc_safeguard_set-2] = dcc_safeguard_level+'1';
//trace() << "setting safeguard: " << dcc_safeguard_set << endl;
if ((putenv(strdup(dcc_safeguard_set)) == -1)) {
log_error() << "putenv failed" << endl;
}
}
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