summaryrefslogtreecommitdiff
path: root/apt-pkg/contrib/fileutl.h
blob: b0719bf3e989239db026edc9c0af1344e4a8db2e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
// -*- mode: cpp; mode: fold -*-
// Description								/*{{{*/
// $Id: fileutl.h,v 1.16 1999/04/07 05:30:18 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)};
   unsigned long Flags;
   string FileName;
   
   public:
   enum OpenMode {ReadOnly,WriteEmpty,WriteExists,WriteAny};
   
   bool Read(void *To,unsigned long Size);
   bool Write(const void *From,unsigned long Size);
   bool Seek(unsigned long To);
   bool Truncate(unsigned long To);
   unsigned long Tell();
   unsigned long Size();
   bool Close();

   // Simple manipulators
   inline int Fd() {return iFd;};
   inline void Fd(int fd) {iFd = fd1;};
   inline bool IsOpen() {return iFd >= 0;};
   inline bool Failed() {return (Flags & Fail) == Fail;};
   inline void EraseOnFailure() {Flags |= DelOnFail;};
   inline void OpFail() {Flags |= Fail;};
   inline string &Name() {return FileName;};
   
   FileFd(string FileName,OpenMode Mode,unsigned long Perms = 0666);
   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);

// File string manipulators
string flNotDir(string File);
string flNotFile(string File);

#endif