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
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: gzip.cc,v 1.17.2.1 2004/01/16 18:58:50 mdz Exp $
/* ######################################################################
GZip method - Take a file URI in and decompress it into the target
file.
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
#include <config.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/acquire-method.h>
#include <apt-pkg/error.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/hashes.h>
#include <apt-pkg/strutl.h>
#include <apt-pkg/aptconfiguration.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <string>
#include <vector>
#include <apti18n.h>
/*}}}*/
const char *Prog;
class GzipMethod : public pkgAcqMethod
{
virtual bool Fetch(FetchItem *Itm) APT_OVERRIDE;
virtual bool Configuration(std::string Message) APT_OVERRIDE;
public:
GzipMethod() : pkgAcqMethod("1.1",SingleInstance | SendConfig) {};
};
bool GzipMethod::Configuration(std::string Message)
{
if (pkgAcqMethod::Configuration(Message) == false)
return false;
DropPrivsOrDie();
return true;
}
// GzipMethod::Fetch - Decompress the passed URI /*{{{*/
// ---------------------------------------------------------------------
/* */
bool GzipMethod::Fetch(FetchItem *Itm)
{
URI Get = Itm->Uri;
std::string Path = Get.Host + Get.Path; // To account for relative paths
FetchResult Res;
Res.Filename = Itm->DestFile;
URIStart(Res);
std::vector<APT::Configuration::Compressor> const compressors = APT::Configuration::getCompressors();
std::vector<APT::Configuration::Compressor>::const_iterator compressor = compressors.begin();
for (; compressor != compressors.end(); ++compressor)
if (compressor->Name == Prog)
break;
if (compressor == compressors.end())
return _error->Error("Extraction of file %s requires unknown compressor %s", Path.c_str(), Prog);
// Open the source and destination files
FileFd From, To;
if (_config->FindB("Method::Compress", false) == false)
{
From.Open(Path, FileFd::ReadOnly, *compressor);
if(From.FileSize() == 0)
return _error->Error(_("Empty files can't be valid archives"));
To.Open(Itm->DestFile, FileFd::WriteAtomic);
}
else
{
From.Open(Path, FileFd::ReadOnly);
To.Open(Itm->DestFile, FileFd::WriteOnly | FileFd::Create | FileFd::Empty, *compressor);
}
To.EraseOnFailure();
if (From.IsOpen() == false || From.Failed() == true ||
To.IsOpen() == false || To.Failed() == true)
return false;
// Read data from source, generate checksums and write
Hashes Hash(Itm->ExpectedHashes);
bool Failed = false;
while (1)
{
unsigned char Buffer[4*1024];
unsigned long long Count = 0;
if (!From.Read(Buffer,sizeof(Buffer),&Count))
{
To.OpFail();
return false;
}
if (Count == 0)
break;
Hash.Add(Buffer,Count);
if (To.Write(Buffer,Count) == false)
{
Failed = true;
break;
}
}
From.Close();
Res.Size = To.FileSize();
To.Close();
if (Failed == true)
return false;
// Transfer the modification times
struct stat Buf;
if (stat(Path.c_str(),&Buf) != 0)
return _error->Errno("stat",_("Failed to stat"));
struct timeval times[2];
times[0].tv_sec = Buf.st_atime;
Res.LastModified = times[1].tv_sec = Buf.st_mtime;
times[0].tv_usec = times[1].tv_usec = 0;
if (utimes(Itm->DestFile.c_str(), times) != 0)
return _error->Errno("utimes",_("Failed to set modification time"));
// Return a Done response
Res.TakeHashes(Hash);
URIDone(Res);
return true;
}
/*}}}*/
int main(int, char *argv[])
{
setlocale(LC_ALL, "");
Prog = strrchr(argv[0],'/');
++Prog;
GzipMethod Mth;
return Mth.Run();
}
|
