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/*
* Copyright (C) 2007-2023 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.
*/
#ifndef BU_PROCESS_H
#define BU_PROCESS_H
#include <stdint.h>
#include <sys/types.h>
#include "bu/stream.h"
#include "bu/string.h"
namespace Bu
{
/**
* Runs a program and attaches streams to it's stdin, stdout, and stderr.
* Reading from a Bu::Process will read from the program's standard output,
* writing to a Bu::Process will write to the program's standard input.
*/
class Process : public Bu::Stream
{
public:
enum Flags
{
None = 0x00,
StdOut = 0x01,
StdErr = 0x02,
Both = 0x03
};
public:
class Options
{
public:
enum OptFlags
{
None = 0x00,
SetUid = 0x01,
SetGid = 0x02,
};
Options() : eFlags( None ) {}
int eFlags;
int iUid;
int iGid;
};
Process( Flags eFlags, const char *sName, char *const argv[] );
Process( Flags eFlags, const char *sName, const char *argv, ...);
Process( Flags eFlags, const Options &opt, const char *sName, char *const argv[] );
Process( Flags eFlags, const Options &opt, const char *sName, const char *argv, ...);
virtual ~Process();
/**
* Waits until the process exits. This blocks the caller until the
* child process terminates.
*/
void wait();
virtual void close();
virtual void closeStdIn();
virtual void closeStdOut();
virtual Bu::size read( void *pBuf, Bu::size nBytes );
virtual Bu::size readErr( void *pBuf, Bu::size nBytes );
virtual Bu::size write( const void *pBuf, Bu::size nBytes );
using Stream::write;
virtual Bu::size tell();
virtual void seek( Bu::size offset );
virtual void setPos( Bu::size pos );
virtual void setPosEnd( Bu::size pos );
virtual bool isEos();
virtual bool isOpen();
virtual void flush();
virtual bool canRead();
virtual bool canWrite();
virtual bool isReadable();
virtual bool isWritable();
virtual bool isSeekable();
virtual bool isBlocking();
virtual void setBlocking( bool bBlocking=true );
virtual void setSize( Bu::size iSize );
virtual size getBlockSize() const;
virtual size getSize() const;
virtual Bu::String getLocation() const;
void select( bool &bStdOut, bool &bStdErr );
bool isRunning();
void ignoreStdErr();
/**
* Returns the pid of the child process, or zero if there is no
* currently running child. Note that a read operation must be
* performed in order to discover that the child has ended.
*/
pid_t getPid();
/**
* Returns true if the child exited normally (by calling exit or
* returning from main).
*/
bool childExited();
/**
* Returns the 8 bit integer value returned from the child program if
* childExited returned true.
*/
int childExitStatus();
/**
* Returns true if the child exited because of a signal.
*/
bool childSignaled();
/**
* Returns the signal ID if the childSignaled return true.
*/
int childSignal();
/**
* Returns true if the child left a core dump behind when it exited.
*/
bool childCoreDumped();
private:
class ProcData
{
public:
ProcData();
#ifdef WIN32
void *hStdIn;
void *hStdOut;
void *hStdErr;
void *hProcess;
#else
int iStdIn;
int iStdOut;
int iStdErr;
pid_t iPid;
#endif
};
ProcData pd;
int iProcStatus;
bool bBlocking;
bool bStdOutEos;
bool bStdErrEos;
void gexec( Flags eFlags, const char *sName, char *const argv[] );
void checkClose();
Options opt;
};
}
#endif
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