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
|
/* winf.cc
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include "winsup.h"
#include <stdlib.h>
#include "cygerrno.h"
#include "security.h"
#include "path.h"
#include "fhandler.h"
#include "dtable.h"
#include "cygheap.h"
#include "tls_pbuf.h"
#include "winf.h"
#include "sys/cygwin.h"
void
linebuf::finish (bool cmdlenoverflow_ok)
{
if (!ix)
add ("", 1);
else
{
if (ix-- > MAXCYGWINCMDLEN && cmdlenoverflow_ok)
ix = MAXCYGWINCMDLEN - 1;
buf[ix] = '\0';
}
}
void
linebuf::add (const char *what, int len)
{
size_t newix = ix + len;
if (newix >= alloced || !buf)
{
alloced += LINE_BUF_CHUNK + newix;
buf = (char *) realloc (buf, alloced + 1);
}
memcpy (buf + ix, what, len);
ix = newix;
buf[ix] = '\0';
}
void
linebuf::prepend (const char *what, int len)
{
int buflen;
size_t newix;
if ((newix = ix + len) >= alloced)
{
alloced += LINE_BUF_CHUNK + newix;
buf = (char *) realloc (buf, alloced + 1);
buf[ix] = '\0';
}
if ((buflen = strlen (buf)))
memmove (buf + len, buf, buflen + 1);
else
buf[newix] = '\0';
memcpy (buf, what, len);
ix = newix;
}
bool
linebuf::fromargv (av& newargv, const char *real_path, bool cmdlenoverflow_ok)
{
bool success = true;
for (int i = 0; i < newargv.argc; i++)
{
char *p = NULL;
const char *a;
a = i ? newargv[i] : (char *) real_path;
int len = strlen (a);
if (len != 0 && !strpbrk (a, " \t\n\r\""))
add (a, len);
else
{
add ("\"", 1);
/* Handle embedded special characters " and \.
A " is always preceded by a \.
A \ is not special unless it precedes a ". If it does,
then all preceding \'s must be doubled to avoid having
the Windows command line parser interpret the \ as quoting
the ". This rule applies to a string of \'s before the end
of the string, since cygwin/windows uses a " to delimit the
argument. */
for (; (p = strpbrk (a, "\"\\")); a = ++p)
{
add (a, p - a);
/* Find length of string of backslashes */
int n = strspn (p, "\\");
if (!n)
add ("\\\"", 2); /* No backslashes, so it must be a ".
The " has to be protected with a backslash. */
else
{
add (p, n); /* Add the run of backslashes */
/* Need to double up all of the preceding
backslashes if they precede a quote or EOS. */
if (!p[n] || p[n] == '"')
add (p, n);
p += n - 1; /* Point to last backslash */
}
}
if (*a)
add (a);
add ("\"", 1);
}
add (" ", 1);
}
finish (cmdlenoverflow_ok);
if (ix >= MAXWINCMDLEN)
{
debug_printf ("command line too long (>32K), return E2BIG");
set_errno (E2BIG);
success = false;
}
return success;
}
int
av::unshift (const char *what)
{
char **av;
av = (char **) crealloc (argv, (argc + 2) * sizeof (char *));
if (!av)
return 0;
argv = av;
memmove (argv + 1, argv, (argc + 1) * sizeof (char *));
*argv = cstrdup1 (what);
calloced++;
argc++;
return 1;
}
|
