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system.c
Go to the documentation of this file.
1
/*-------------------------------------------------------------------------
2
*
3
* system.c
4
* Win32 system() and popen() replacements
5
*
6
*
7
* Win32 needs double quotes at the beginning and end of system()
8
* strings. If not, it gets confused with multiple quoted strings.
9
* It also requires double-quotes around the executable name and
10
* any files used for redirection. Filter other args through
11
* appendShellString() to quote them.
12
*
13
* Generated using Win32 "CMD /?":
14
*
15
* 1. If all of the following conditions are met, then quote characters
16
* on the command line are preserved:
17
*
18
* - no /S switch
19
* - exactly two quote characters
20
* - no special characters between the two quote characters, where special
21
* is one of: &<>()@^|
22
* - there are one or more whitespace characters between the two quote
23
* characters
24
* - the string between the two quote characters is the name of an
25
* executable file.
26
*
27
* 2. Otherwise, old behavior is to see if the first character is a quote
28
* character and if so, strip the leading character and remove the last
29
* quote character on the command line, preserving any text after the last
30
* quote character.
31
*
32
* Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
33
*
34
* src/port/system.c
35
*
36
*-------------------------------------------------------------------------
37
*/
38
39
#if defined(WIN32) && !defined(__CYGWIN__)
40
41
#ifndef FRONTEND
42
#include "
postgres.h
"
43
#else
44
#include "
postgres_fe.h
"
45
#endif
46
47
#include <fcntl.h>
48
49
#undef system
50
#undef popen
51
52
int
53
pgwin32_system(
const
char
*command)
54
{
55
size_t
cmdlen = strlen(command);
56
char
*
buf
;
57
int
save_errno;
58
int
res
;
59
60
/*
61
* Create a malloc'd copy of the command string, enclosed with an extra
62
* pair of quotes
63
*/
64
buf
=
malloc
(cmdlen + 2 + 1);
65
if
(
buf
== NULL)
66
{
67
errno = ENOMEM;
68
return
-1;
69
}
70
buf
[0] =
'"'
;
71
memcpy(&
buf
[1], command, cmdlen);
72
buf
[cmdlen + 1] =
'"'
;
73
buf
[cmdlen + 2] =
'\0'
;
74
75
res
= system(
buf
);
76
77
save_errno = errno;
78
free
(
buf
);
79
errno = save_errno;
80
81
return
res
;
82
}
83
84
85
FILE *
86
pgwin32_popen(
const
char
*command,
const
char
*
type
)
87
{
88
size_t
cmdlen = strlen(command);
89
char
*
buf
;
90
int
save_errno;
91
FILE *
res
;
92
93
/*
94
* Create a malloc'd copy of the command string, enclosed with an extra
95
* pair of quotes
96
*/
97
buf
=
malloc
(cmdlen + 2 + 1);
98
if
(
buf
== NULL)
99
{
100
errno = ENOMEM;
101
return
NULL;
102
}
103
buf
[0] =
'"'
;
104
memcpy(&
buf
[1], command, cmdlen);
105
buf
[cmdlen + 1] =
'"'
;
106
buf
[cmdlen + 2] =
'\0'
;
107
108
res
= _popen(
buf
,
type
);
109
110
save_errno = errno;
111
free
(
buf
);
112
errno = save_errno;
113
114
return
res
;
115
}
116
117
#endif
res
static void PGresult * res
Definition:
dblink.c:165
free
#define free(a)
Definition:
header.h:65
malloc
#define malloc(a)
Definition:
header.h:50
buf
static char * buf
Definition:
pg_test_fsync.c:72
postgres.h
postgres_fe.h
type
const char * type
Definition:
wait_event_funcs.c:27
src
port
system.c
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