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
|
/* pipe.cc: pipe for Cygwin.
Copyright 1996, 1998, 1999, 2000, 2001 Red Hat, Inc.
This file is part of Cygwin.
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 <unistd.h>
#include <sys/fcntl.h>
#include <errno.h>
#include "cygerrno.h"
#include "security.h"
#include "fhandler.h"
#include "dtable.h"
#include "cygheap.h"
#include "thread.h"
static int
make_pipe (int fildes[2], unsigned int psize, int mode)
{
SetResourceLock (LOCK_FD_LIST, WRITE_LOCK | READ_LOCK, "make_pipe");
HANDLE r, w;
int fdr = -1, fdw = -1;
SECURITY_ATTRIBUTES *sa = (mode & O_NOINHERIT) ? &sec_none_nih : &sec_none;
int res = -1;
if ((fdr = cygheap->fdtab.find_unused_handle ()) < 0)
set_errno (ENMFILE);
else if ((fdw = cygheap->fdtab.find_unused_handle (fdr + 1)) < 0)
set_errno (ENMFILE);
else if (!CreatePipe (&r, &w, sa, psize))
__seterrno ();
else
{
fhandler_pipe *fhr = (fhandler_pipe *) cygheap->fdtab.build_fhandler (fdr, FH_PIPER, "/dev/piper");
fhandler_pipe *fhw = (fhandler_pipe *) cygheap->fdtab.build_fhandler (fdw, FH_PIPEW, "/dev/pipew");
int binmode = mode & O_TEXT ? 0 : 1;
fhr->init (r, GENERIC_READ, binmode);
fhw->init (w, GENERIC_WRITE, binmode);
if (mode & O_NOINHERIT)
{
fhr->set_close_on_exec_flag (1);
fhw->set_close_on_exec_flag (1);
}
fildes[0] = fdr;
fildes[1] = fdw;
res = 0;
}
syscall_printf ("%d = make_pipe ([%d, %d], %d, %p)", res, fdr, fdw, psize, mode);
ReleaseResourceLock(LOCK_FD_LIST, WRITE_LOCK | READ_LOCK, "make_pipe");
return res;
}
extern "C" int
pipe (int filedes[2])
{
extern DWORD binmode;
return make_pipe (filedes, 16384, (!binmode || binmode == O_BINARY) ? O_BINARY : O_TEXT);
}
extern "C" int
_pipe (int filedes[2], unsigned int psize, int mode)
{
int res = make_pipe (filedes, psize, mode);
/* This type of pipe is not interruptible so set the appropriate flag. */
if (!res)
cygheap->fdtab[filedes[0]]->set_r_no_interrupt (1);
return res;
}
int
dup (int fd)
{
int res;
SetResourceLock (LOCK_FD_LIST, WRITE_LOCK | READ_LOCK, "dup");
res = dup2 (fd, cygheap->fdtab.find_unused_handle ());
ReleaseResourceLock(LOCK_FD_LIST, WRITE_LOCK | READ_LOCK, "dup");
return res;
}
int
dup2 (int oldfd, int newfd)
{
return cygheap->fdtab.dup2 (oldfd, newfd);
}
|
