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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: gzip.cc,v 1.2 1998/10/26 07:11:53 jgg Exp $
/* ######################################################################
GZip method - Take a file URI in and decompress it into the target
file.
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
#include <apt-pkg/fileutl.h>
#include <apt-pkg/error.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/acquire-worker.h>
#include <strutl.h>
#include <sys/stat.h>
#include <unistd.h>
#include <utime.h>
#include <wait.h>
#include <stdio.h>
/*}}}*/
// Fail - Generate a failure message /*{{{*/
// ---------------------------------------------------------------------
/* */
void Fail(string URI)
{
string Err = "Undetermined Error";
if (_error->empty() == false)
_error->PopMessage(Err);
printf("400 URI Failure\n"
"URI: %s\n"
"Message: %s\n\n",URI.c_str(),Err.c_str());
_error->Discard();
}
/*}}}*/
int main()
{
setlinebuf(stdout);
SetNonBlock(STDIN_FILENO,true);
printf("100 Capabilities\n"
"Version: 1.0\n"
"Pipeline: true\n"
"Send-Config: true\n\n");
vector<string> Messages;
while (1)
{
if (WaitFd(STDIN_FILENO) == false ||
ReadMessages(STDIN_FILENO,Messages) == false)
return 0;
while (Messages.empty() == false)
{
string Message = Messages.front();
Messages.erase(Messages.begin());
// Fetch the message number
char *End;
int Number = strtol(Message.c_str(),&End,10);
if (End == Message.c_str())
{
cerr << "Malformed message!" << endl;
return 100;
}
// 601 configuration message
if (Number == 601)
{
pkgInjectConfiguration(Message,*_config);
continue;
}
// 600 URI Fetch message
if (Number != 600)
continue;
// Grab the URI bit
string URI = LookupTag(Message,"URI");
string Target = LookupTag(Message,"Filename");
// Grab the filename
string::size_type Pos = URI.find(':');
if (Pos == string::npos)
{
_error->Error("Invalid message");
Fail(URI);
continue;
}
string File = string(URI,Pos+1);
// Start the reply message
string Result = "201 URI Done";
Result += "\nURI: " + URI;
Result += "\nFileName: " + Target;
// See if the file exists
FileFd From(File,FileFd::ReadOnly);
FileFd To(Target,FileFd::WriteEmpty);
To.EraseOnFailure();
if (_error->PendingError() == true)
{
Fail(URI);
continue;
}
// Fork gzip
int Process = fork();
if (Process < 0)
{
_error->Errno("fork","Couldn't fork gzip");
Fail(URI);
continue;
}
// The child
if (Process == 0)
{
dup2(From.Fd(),STDIN_FILENO);
dup2(To.Fd(),STDOUT_FILENO);
From.Close();
To.Close();
SetCloseExec(STDIN_FILENO,false);
SetCloseExec(STDOUT_FILENO,false);
const char *Args[3];
Args[0] = _config->Find("Dir::bin::gzip","gzip").c_str();
Args[1] = "-d";
Args[2] = 0;
execvp(Args[0],(char **)Args);
exit(100);
}
From.Close();
// Wait for gzip to finish
int Status;
if (waitpid(Process,&Status,0) != Process)
{
To.OpFail();
_error->Errno("wait","Waiting for gzip failed");
Fail(URI);
continue;
}
if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
{
To.OpFail();
_error->Error("gzip failed, perhaps the disk is full or the directory permissions are wrong.");
Fail(URI);
continue;
}
To.Close();
// Transfer the modification times
struct stat Buf;
if (stat(File.c_str(),&Buf) != 0)
{
_error->Errno("stat","Failed to stat");
Fail(URI);
continue;
}
struct utimbuf TimeBuf;
TimeBuf.actime = Buf.st_atime;
TimeBuf.modtime = Buf.st_mtime;
if (utime(Target.c_str(),&TimeBuf) != 0)
{
_error->Errno("utime","Failed to set modification time");
Fail(URI);
continue;
}
// Send the message
Result += "\n\n";
if (write(STDOUT_FILENO,Result.begin(),Result.length()) !=
(signed)Result.length())
return 100;
}
}
return 0;
}
|
