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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: fileutl.h,v 1.23 2001/02/20 07:03:17 jgg Exp $
/* ######################################################################
File Utilities
CopyFile - Buffered copy of a single file
GetLock - dpkg compatible lock file manipulation (fcntl)
FileExists - Returns true if the file exists
SafeGetCWD - Returns the CWD in a string with overrun protection
The file class is a handy abstraction for various functions+classes
that need to accept filenames.
This source is placed in the Public Domain, do with it what you will
It was originally written by Jason Gunthorpe.
##################################################################### */
/*}}}*/
#ifndef PKGLIB_FILEUTL_H
#define PKGLIB_FILEUTL_H
#ifdef __GNUG__
#pragma interface "apt-pkg/fileutl.h"
#endif
#include <string>
class FileFd
{
protected:
int iFd;
enum LocalFlags {AutoClose = (1<<0),Fail = (1<<1),DelOnFail = (1<<2),
HitEof = (1<<3)};
unsigned long Flags;
string FileName;
public:
enum OpenMode {ReadOnly,WriteEmpty,WriteExists,WriteAny};
bool Read(void *To,unsigned long Size,bool AllowEof = false);
bool Write(const void *From,unsigned long Size);
bool Seek(unsigned long To);
bool Skip(unsigned long To);
bool Truncate(unsigned long To);
unsigned long Tell();
unsigned long Size();
bool Open(string FileName,OpenMode Mode,unsigned long Perms = 0666);
bool Close();
bool Sync();
// Simple manipulators
inline int Fd() {return iFd;};
inline void Fd(int fd) {iFd = fd;};
inline bool IsOpen() {return iFd >= 0;};
inline bool Failed() {return (Flags & Fail) == Fail;};
inline void EraseOnFailure() {Flags |= DelOnFail;};
inline void OpFail() {Flags |= Fail;};
inline bool Eof() {return (Flags & HitEof) == HitEof;};
inline string &Name() {return FileName;};
FileFd(string FileName,OpenMode Mode,unsigned long Perms = 0666) : iFd(-1),
Flags(0)
{
Open(FileName,Mode,Perms);
};
FileFd(int Fd = -1) : iFd(Fd), Flags(AutoClose) {};
FileFd(int Fd,bool) : iFd(Fd), Flags(0) {};
virtual ~FileFd();
};
bool CopyFile(FileFd &From,FileFd &To);
int GetLock(string File,bool Errors = true);
bool FileExists(string File);
string SafeGetCWD();
void SetCloseExec(int Fd,bool Close);
void SetNonBlock(int Fd,bool Block);
bool WaitFd(int Fd,bool write = false,unsigned long timeout = 0);
int ExecFork();
bool ExecWait(int Pid,const char *Name,bool Reap = false);
// File string manipulators
string flNotDir(string File);
string flNotFile(string File);
string flNoLink(string File);
string flExtension(string File);
string flCombine(string Dir,string File);
#endif
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