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/*
* Copyright (C) 2007-2008 Xagasoft, All rights reserved.
*
* This file is part of the libbu++ library and is released under the
* terms of the license contained in the file LICENSE.
*/
#include "process.h"
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <stdarg.h>
#include <signal.h>
#include <fcntl.h>
#include <errno.h>
Bu::Process::Process( const char *sName, char *const argv[] ) :
iPid( 0 )
{
gexec( sName, argv );
}
Bu::Process::Process( const char *sName, const char *argv, ...) :
iPid( 0 )
{
int iCnt = 0;
va_list ap;
va_start( ap, argv );
for(; va_arg( ap, const char *); iCnt++ ) { }
va_end( ap );
char const **list = new char const *[iCnt+2];
va_start( ap, argv );
list[0] = argv;
for( int j = 1; j <= iCnt; j++ )
{
list[j] = va_arg( ap, const char *);
}
list[iCnt+1] = NULL;
va_end( ap );
gexec( sName, (char *const *)list );
delete[] list;
}
Bu::Process::~Process()
{
close();
}
void Bu::Process::gexec( const char *sName, char *const argv[] )
{
int iaStdIn[2];
int iaStdOut[2];
// int iaStdErr[2];
pipe( iaStdIn );
pipe( iaStdOut );
// pipe( iaStdErr );
iStdIn = iaStdIn[1];
iStdOut = iaStdOut[0];
// iStdErr = iaStdErr[0];
// fcntl( iStdOut, F_SETFL, fcntl( iStdOut, F_GETFL, 0 )|O_NONBLOCK );
iPid = fork();
if( iPid == 0 )
{
::close( iaStdIn[1] );
::close( iaStdOut[0] );
// ::close( iaStdErr[0] );
dup2( iaStdIn[0], 0 );
dup2( iaStdOut[1], 1 );
// dup2( iaStdErr[1], 2 );
execvp( sName, argv );
throw Bu::ExceptionBase("Hey, execvp failed!");
}
::close( iaStdIn[0] );
::close( iaStdOut[1] );
// ::close( iaStdErr[1] );
}
void Bu::Process::close()
{
if( iPid )
{
::close( iStdIn );
::close( iStdOut );
int status;
waitpid( iPid, &status, 0 );
iPid = 0;
}
}
size_t Bu::Process::read( void *pBuf, size_t nBytes )
{
return TEMP_FAILURE_RETRY( ::read( iStdOut, pBuf, nBytes ) );
/*
size_t iTotal = 0;
for(;;)
{
size_t iRet = ::read( iStdOut, (char *)pBuf+iTotal, nBytes-iTotal );
if( iRet == 0 )
return iTotal;
iTotal += iRet;
if( iTotal == nBytes )
return iTotal;
}
*/
/*
size_t iTotal = 0;
fd_set rfs;
FD_ZERO( &rfs );
for(;;)
{
if( waitpid( iPid, NULL, WNOHANG ) )
{
printf("!!!wait failed!\n");
size_t iRet = ::read( iStdOut, (char *)pBuf+iTotal,
nBytes-iTotal );
iTotal += iRet;
return iTotal;
}
FD_SET( iStdOut, &rfs );
select( iStdOut+1, &rfs, NULL, &rfs, NULL );
size_t iRet = ::read( iStdOut, (char *)pBuf+iTotal, nBytes-iTotal );
printf("--read=%d / %d--\n", iRet, iTotal+iRet );
iTotal += iRet;
if( iTotal == nBytes )
return iTotal;
}
*/
}
size_t Bu::Process::readErr( void *pBuf, size_t nBytes )
{
return ::read( iStdErr, pBuf, nBytes );
}
size_t Bu::Process::write( const void *pBuf, size_t nBytes )
{
return TEMP_FAILURE_RETRY( ::write( iStdIn, pBuf, nBytes ) );
}
long Bu::Process::tell()
{
return 0;
}
void Bu::Process::seek( long )
{
}
void Bu::Process::setPos( long )
{
}
void Bu::Process::setPosEnd( long )
{
}
bool Bu::Process::isEos()
{
return false;
}
bool Bu::Process::isOpen()
{
return true;
}
void Bu::Process::flush()
{
}
bool Bu::Process::canRead()
{
return true;
}
bool Bu::Process::canWrite()
{
return true;
}
bool Bu::Process::isReadable()
{
return true;
}
bool Bu::Process::isWritable()
{
return true;
}
bool Bu::Process::isSeekable()
{
return false;
}
bool Bu::Process::isBlocking()
{
return true;
}
void Bu::Process::setBlocking( bool bBlocking )
{
if( bBlocking )
fcntl( iStdOut, F_SETFL, fcntl( iStdOut, F_GETFL, 0 )&(~O_NONBLOCK) );
else
fcntl( iStdOut, F_SETFL, fcntl( iStdOut, F_GETFL, 0 )|O_NONBLOCK );
}
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