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
|
/* gcc on mingw is hardcoded to use /mingw (which is c:/mingw) to
find various files. If this is a different version of mingw to the
one that we have in the GHC tree then things can go wrong. We
therefore need to add various -B flags to the gcc commandline,
so that it uses our in-tree mingw. Hence this wrapper. */
#include "cwrapper.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <windows.h>
void die(const char *fmt, ...) {
va_list argp;
va_start(argp, fmt);
vfprintf(stderr, fmt, argp);
va_end(argp);
exit(1);
}
char *mkString(const char *fmt, ...) {
char *p;
int i, j;
va_list argp;
va_start(argp, fmt);
i = vsnprintf(NULL, 0, fmt, argp);
va_end(argp);
if (i < 0) {
die("vsnprintf 0 failed: errno %d: %s\n", errno, strerror(errno));
}
p = malloc(i + 1);
if (p == NULL) {
die("malloc failed: errno %d: %s\n", errno, strerror(errno));
}
va_start(argp, fmt);
j = vsnprintf(p, i + 1, fmt, argp);
va_end(argp);
if (j < 0) {
die("vsnprintf with %d failed: errno %d: %s\n",
i + 1, errno, strerror(errno));
}
return p;
}
char *flattenAndQuoteArgs(char *ptr, int argc, char *argv[])
{
int i;
char *src;
for (i = 0; i < argc; i++) {
*ptr++ = '"';
src = argv[i];
while(*src) {
if (*src == '"') {
*ptr++ = '\\';
}
*ptr++ = *src++;
}
*ptr++ = '"';
*ptr++ = ' ';
}
return ptr;
}
__attribute__((noreturn)) int run (char *exePath,
int numArgs1, char **args1,
int numArgs2, char **args2)
{
int i, cmdline_len;
char *new_cmdline, *ptr;
STARTUPINFO si;
PROCESS_INFORMATION pi;
ZeroMemory(&pi, sizeof(PROCESS_INFORMATION));
ZeroMemory(&si, sizeof(STARTUPINFO));
si.cb = sizeof(STARTUPINFO);
/* Compute length of the flattened 'argv'. for each arg:
* + 1 for the space
* + chars * 2 (accounting for possible escaping)
* + 2 for quotes
*/
cmdline_len = 1 + strlen(exePath)*2 + 2;
for (i=0; i < numArgs1; i++) {
cmdline_len += 1 + strlen(args1[i])*2 + 2;
}
for (i=0; i < numArgs2; i++) {
cmdline_len += 1 + strlen(args2[i])*2 + 2;
}
new_cmdline = (char*)malloc(sizeof(char) * (cmdline_len + 1));
if (!new_cmdline) {
die("failed to start up %s; insufficient memory", exePath);
}
ptr = flattenAndQuoteArgs(new_cmdline, 1, &exePath);
ptr = flattenAndQuoteArgs(ptr, numArgs1, args1);
ptr = flattenAndQuoteArgs(ptr, numArgs2, args2);
*--ptr = '\0'; // replace the final space with \0
/* Note: Used to use _spawnv(_P_WAIT, ...) here, but it suffered
from the parent intercepting console events such as Ctrl-C,
which it shouldn't. Installing an ignore-all console handler
didn't do the trick either.
Irrespective of this issue, using CreateProcess() is preferable,
as it makes this wrapper work on both mingw and cygwin.
*/
#if 0
fprintf(stderr, "Invoking %s\n", new_cmdline); fflush(stderr);
#endif
if (!CreateProcess(exePath,
new_cmdline,
NULL,
NULL,
TRUE,
0, /* dwCreationFlags */
NULL, /* lpEnvironment */
NULL, /* lpCurrentDirectory */
&si, /* lpStartupInfo */
&pi) ) {
die("Unable to start %s (error code: %lu)\n", exePath, GetLastError());
}
/* Synchronize input and wait for target to be ready. */
WaitForInputIdle(pi.hProcess, INFINITE);
switch (WaitForSingleObject(pi.hProcess, INFINITE) ) {
case WAIT_OBJECT_0:
{
DWORD pExitCode;
if (GetExitCodeProcess(pi.hProcess, &pExitCode) == 0) {
exit(1);
}
exit(pExitCode);
}
case WAIT_ABANDONED:
case WAIT_FAILED:
/* in the event we get any hard errors, bring the child to a halt. */
TerminateProcess(pi.hProcess,1);
exit(1);
default:
exit(1);
}
}
|
