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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
*/
/**
* @file
*
* Run the preprocessor. Client-side only.
**/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include "client.h"
using namespace std;
bool dcc_is_preprocessed(const string& sfile)
{
if( sfile.size() < 3 )
return false;
int last = sfile.size() - 1;
if( sfile[last-1] == '.' && sfile[last] == 'i' )
return true; // .i
if( sfile[last-2] == '.' && sfile[last-1] == 'i' && sfile[last] == 'i' )
return true; // .ii
return false;
}
/**
* If the input filename is a plain source file rather than a
* preprocessed source file, then preprocess it to a temporary file
* and return the name in @p cpp_fname.
*
* The preprocessor may still be running when we return; you have to
* wait for @p cpp_fid to exit before the output is complete. This
* allows us to overlap opening the TCP socket, which probably doesn't
* use many cycles, with running the preprocessor.
**/
pid_t call_cpp(CompileJob &job, int fdwrite, int fdread)
{
flush_debug();
pid_t pid = fork();
if (pid == -1) {
log_perror("failed to fork:");
return -1; /* probably */
} else if (pid != 0) {
/* Parent. Close the write fd. */
if (fdwrite > -1)
close (fdwrite);
return pid;
} else {
/* Child. Close the read fd, in case we have one. */
if (fdread > -1)
close (fdread);
int ret = dcc_ignore_sigpipe(0);
if (ret) /* set handler back to default */
_exit(ret);
char **argv;
if ( dcc_is_preprocessed( job.inputFile() ) ) {
/* already preprocessed, great.
write the file to the fdwrite (using cat) */
argv = new char*[2+1];
argv[0] = strdup( "/bin/cat" );
argv[1] = strdup( job.inputFile().c_str() );
argv[2] = 0;
} else {
list<string> flags = job.localFlags();
/* This has a duplicate meaning. it can either include a file
for preprocessing or a precompiled header. decide which one. */
for (list<string>::iterator it = flags.begin();
it != flags.end();) {
if ((*it) == "-include") {
++it;
if (it != flags.end()) {
std::string p = (*it);
if (access(p.c_str(), R_OK) && !access((p + ".gch").c_str(), R_OK)) {
list<string>::iterator o = --it;
it++;
flags.erase(o);
o = it++;
flags.erase(o);
}
}
}
else
++it;
}
appendList( flags, job.restFlags() );
int argc = flags.size();
argc++; // the program
argc += 2; // -E file.i
argv = new char*[argc + 1];
argv[0] = strdup( find_compiler( job.language() ).c_str() );
int i = 1;
for ( list<string>::const_iterator it = flags.begin();
it != flags.end(); ++it) {
argv[i++] = strdup( it->c_str() );
}
argv[i++] = strdup( "-E" );
argv[i++] = strdup( job.inputFile().c_str() );
argv[i++] = 0;
}
#if 0
printf( "forking " );
for ( int index = 0; argv[index]; index++ )
printf( "%s ", argv[index] );
printf( "\n" );
#endif
if (fdwrite != STDOUT_FILENO) {
/* Ignore failure */
close(STDOUT_FILENO);
dup2(fdwrite, STDOUT_FILENO);
close(fdwrite);
}
dcc_increment_safeguard();
_exit(execv(argv[0], argv));
}
}
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