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
188
189
190
191
192
193
194
195
196
197
198
199
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <algorithm>
#include <iterator>
#include <string>
using namespace std;
// Don't use stderr for errors because VS has large buffers on them, leading
// to confusing error output.
static void Fatal(const wchar_t* msg) {
wprintf(L"supalink fatal error: %s\n", msg);
exit(1);
}
static wstring ErrorMessageToString(DWORD err) {
wchar_t* msg_buf = NULL;
DWORD rc = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM,
NULL,
err,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
reinterpret_cast<LPTSTR>(&msg_buf),
0,
NULL);
if (!rc)
return L"unknown error";
wstring ret(msg_buf);
LocalFree(msg_buf);
return ret;
}
static const wchar_t* const g_search_for[] = {
L"link.exe\" ",
L"link\" ",
L"link.exe ",
L"link ",
};
static void Fallback(const wchar_t* msg = NULL) {
if (msg) {
wprintf(L"supalink failed (%s), trying to fallback to standard link.\n",
msg);
wprintf(L"Original command line: %s\n", GetCommandLine());
fflush(stdout);
}
STARTUPINFO startup_info = { sizeof(STARTUPINFO) };
PROCESS_INFORMATION process_info;
DWORD exit_code;
GetStartupInfo(&startup_info);
wstring orig_cmd(GetCommandLine());
wstring cmd;
wstring replace_with = L"link.exe.supalink_orig.exe";
wstring orig_lowercase;
// Avoid searching for case-variations by making a lower-case copy.
transform(orig_cmd.begin(),
orig_cmd.end(),
back_inserter(orig_lowercase),
tolower);
for (size_t i = 0; i < ARRAYSIZE(g_search_for); ++i) {
wstring linkexe = g_search_for[i];
wstring::size_type at = orig_lowercase.find(linkexe, 0);
if (at == wstring::npos)
continue;
if (linkexe[linkexe.size() - 2] == L'"')
replace_with += L"\" ";
else
replace_with += L" ";
cmd = orig_cmd.replace(at, linkexe.size(), replace_with);
break;
}
if (cmd == L"") {
wprintf(L"Original run '%s'\n", orig_cmd.c_str());
Fatal(L"Couldn't find link.exe (or similar) in command line");
}
if (getenv("SUPALINK_DEBUG")) {
wprintf(L" running '%s'\n", cmd.c_str());
fflush(stdout);
}
if (!CreateProcess(NULL,
reinterpret_cast<LPWSTR>(const_cast<wchar_t *>(
cmd.c_str())),
NULL,
NULL,
TRUE,
0,
NULL,
NULL,
&startup_info, &process_info)) {
wstring error = ErrorMessageToString(GetLastError());
Fatal(error.c_str());
}
CloseHandle(process_info.hThread);
WaitForSingleObject(process_info.hProcess, INFINITE);
GetExitCodeProcess(process_info.hProcess, &exit_code);
CloseHandle(process_info.hProcess);
exit(exit_code);
}
wstring SlurpFile(const wchar_t* path) {
FILE* f = _wfopen(path, L"rb, ccs=UNICODE");
if (!f) Fallback(L"couldn't read file");
fseek(f, 0, SEEK_END);
long len = ftell(f);
rewind(f);
wchar_t* data = reinterpret_cast<wchar_t*>(malloc(len));
fread(data, 1, len, f);
fclose(f);
wstring ret(data, len/sizeof(wchar_t));
free(data);
return ret;
}
void DumpFile(const wchar_t* path, wstring& contents) {
FILE* f = _wfopen(path, L"wb, ccs=UTF-16LE");
if (!f) Fallback(L"couldn't write file");
fwrite(contents.c_str(), sizeof(wchar_t), contents.size(), f);
if (ferror(f))
Fatal(L"failed during response rewrite");
fclose(f);
}
// Input command line is assumed to be of the form:
//
// link.exe @C:\src\...\RSP00003045884740.rsp /NOLOGO /ERRORREPORT:PROMPT
//
// Specifically, we parse & hack the contents of argv[1] and pass the rest
// onwards.
int wmain(int argc, wchar_t** argv) {
ULONGLONG start_time = 0, end_time;
int rsp_file_index = -1;
if (argc < 2)
Fallback(L"too few commmand line args");
for (int i = 1; i < argc; ++i) {
if (argv[i][0] == L'@') {
rsp_file_index = i;
break;
}
}
if (rsp_file_index == -1)
Fallback(L"couldn't find a response file in argv");
if (_wgetenv(L"SUPALINK_DEBUG"))
start_time = GetTickCount64();
wstring rsp = SlurpFile(&argv[rsp_file_index][1]);
// The first line of this file is all we try to fix. It's a bunch of
// quoted space separated items. Simplest thing seems to be replacing " "
// with "\n". So, just slurp the file, replace, spit it out to the same
// file and continue on our way.
// Took about .5s when using the naive .replace loop to replace " " with
// "\r\n" so write the silly loop instead.
wstring fixed;
fixed.reserve(rsp.size() * 2);
for (const wchar_t* s = rsp.c_str(); *s;) {
if (*s == '"' && *(s + 1) == ' ' && *(s + 2) == '"') {
fixed += L"\"\r\n\"";
s += 3;
} else {
fixed += *s++;
}
}
DumpFile(&argv[rsp_file_index][1], fixed);
if (_wgetenv(L"SUPALINK_DEBUG")) {
wstring backup_copy(&argv[rsp_file_index][1]);
backup_copy += L".copy";
DumpFile(backup_copy.c_str(), fixed);
end_time = GetTickCount64();
wprintf(L" took %.2fs to modify @rsp file\n",
(end_time - start_time) / 1000.0);
}
Fallback();
}
|
