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authorJinkun Jang <jinkun.jang@samsung.com>2013-03-12 15:13:12 +0900
committerJinkun Jang <jinkun.jang@samsung.com>2013-03-12 15:13:12 +0900
commitc913e4871de39ddb56024c0b507b3a4c0399eac1 (patch)
tree849b9ab7ca5883d7908b6a297023c95104dfb560 /client/cpp.cpp
parent8701a5293e4e52a995b1ee0b683f234848d8d745 (diff)
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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));
+ }
+}