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/*
This file is part of Icecream.
Copyright (c) 2004 Stephan Kulow <coolo@suse.de>
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 "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <setjmp.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <signal.h>
#include <cassert>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#ifdef HAVE_SYS_SIGNAL_H
# include <sys/signal.h>
#endif /* HAVE_SYS_SIGNAL_H */
#include <sys/param.h>
#include <unistd.h>
#include <job.h>
#include <comm.h>
#include "exitcode.h"
#include "tempfile.h"
#include "workit.h"
#include "logging.h"
#include "serve.h"
#include <sys/time.h>
#ifdef __FreeBSD__
#include <sys/socket.h>
#include <sys/uio.h>
#endif
#ifndef O_LARGEFILE
#define O_LARGEFILE 0
#endif
#ifndef _PATH_TMP
#define _PATH_TMP "/tmp"
#endif
using namespace std;
int nice_level = 5;
static void
error_client( MsgChannel *client, string error )
{
if ( IS_PROTOCOL_22( client ) )
client->send_msg( StatusTextMsg( error ) );
}
/**
* Read a request, run the compiler, and send a response.
**/
int handle_connection( const string &basedir, CompileJob *job,
MsgChannel *client, int &out_fd,
unsigned int mem_limit, uid_t nobody_uid, gid_t nobody_gid )
{
int socket[2];
if ( pipe( socket ) == -1)
return -1;
flush_debug();
pid_t pid = fork();
assert(pid >= 0);
if ( pid > 0) { // parent
close( socket[1] );
out_fd = socket[0];
fcntl(out_fd, F_SETFD, FD_CLOEXEC);
return pid;
}
reset_debug(0);
close( socket[0] );
out_fd = socket[1];
/* internal communication channel, don't inherit to gcc */
fcntl(out_fd, F_SETFD, FD_CLOEXEC);
nice( nice_level );
Msg *msg = 0; // The current read message
unsigned int job_id = 0;
int obj_fd = -1; // the obj_fd
string obj_file;
try {
if ( job->environmentVersion().size() ) {
string dirname = basedir + "/target=" + job->targetPlatform() + "/" + job->environmentVersion();
if ( ::access( string( dirname + "/usr/bin/gcc" ).c_str(), X_OK ) ) {
error_client( client, dirname + "/usr/bin/gcc is not executable" );
log_error() << "I don't have environment " << job->environmentVersion() << "(" << job->targetPlatform() << ") " << job->jobID() << endl;
throw myexception( EXIT_DISTCC_FAILED ); // the scheduler didn't listen to us!
}
if ( getuid() == 0 ) {
// without the chdir, the chroot will escape the
// jail right away
if ( chdir( dirname.c_str() ) < 0 ) {
error_client( client, string( "chdir to " ) + dirname + "failed" );
log_perror("chdir() failed" );
_exit(145);
}
if ( chroot( dirname.c_str() ) < 0 ) {
error_client( client, string( "chroot " ) + dirname + "failed" );
log_perror("chroot() failed" );
_exit(144);
}
if ( setgid( nobody_gid ) < 0 ) {
error_client( client, string( "setgid failed" ));
log_perror("setgid() failed" );
_exit(143);
}
if ( setuid( nobody_uid ) < 0) {
error_client( client, string( "setuid failed" ));
log_perror("setuid() failed" );
_exit(142);
}
}
else
if ( chdir( dirname.c_str() ) ) {
log_perror( "chdir" );
} else {
trace() << "chdir to " << dirname << endl;
}
}
else
chdir( "/" );
if ( ::access( _PATH_TMP + 1, W_OK ) ) {
error_client( client, "can't write to " _PATH_TMP );
log_error() << "can't write into " << _PATH_TMP << " " << strerror( errno ) << endl;
throw myexception( -1 );
}
int ret;
unsigned int job_stat[8];
CompileResultMsg rmsg;
job_id = job->jobID();
memset(job_stat, 0, sizeof(job_stat));
char tmp_output[PATH_MAX];
char prefix_output[PATH_MAX]; // I'm too lazy to calculate how many digits 2^64 is :)
sprintf( prefix_output, "icecc-%d", job_id );
if ( ( ret = dcc_make_tmpnam(prefix_output, ".o", tmp_output, 1 ) ) == 0 ) {
obj_file = tmp_output;
ret = work_it( *job, job_stat, client, rmsg, obj_file, mem_limit, client->fd,
-1 );
}
delete job;
job = 0;
if ( ret ) {
if ( ret == EXIT_OUT_OF_MEMORY ) { // we catch that as special case
rmsg.was_out_of_memory = true;
} else {
throw myexception( ret );
}
}
if ( !client->send_msg( rmsg ) ) {
log_info() << "write of result failed\n";
throw myexception( EXIT_DISTCC_FAILED );
}
struct stat st;
if (!stat(obj_file.c_str(), &st))
job_stat[JobStatistics::out_uncompressed] = st.st_size;
/* wake up parent and tell him that compile finished */
/* if the write failed, well, doesn't matter */
write( out_fd, job_stat, sizeof( job_stat ) );
close( out_fd );
if ( rmsg.status == 0 ) {
obj_fd = open( obj_file.c_str(), O_RDONLY|O_LARGEFILE );
if ( obj_fd == -1 ) {
log_error() << "open failed\n";
error_client( client, "open of object file failed" );
throw myexception( EXIT_DISTCC_FAILED );
}
unsigned char buffer[100000];
do {
ssize_t bytes = read(obj_fd, buffer, sizeof(buffer));
if ( bytes < 0 )
{
if ( errno == EINTR )
continue;
throw myexception( EXIT_DISTCC_FAILED );
}
if ( !bytes )
break;
FileChunkMsg fcmsg( buffer, bytes );
if ( !client->send_msg( fcmsg ) ) {
log_info() << "write of obj chunk failed " << bytes << endl;
throw myexception( EXIT_DISTCC_FAILED );
}
} while (1);
}
throw myexception( rmsg.status );
} catch ( myexception e )
{
if ( client && e.exitcode() == 0 )
client->send_msg( EndMsg() );
delete client;
client = 0;
delete msg;
delete job;
if ( obj_fd > -1)
close( obj_fd );
if ( !obj_file.empty() )
unlink( obj_file.c_str() );
_exit( e.exitcode() );
}
}
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