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
|
/* Copyright (C) 1994,95,97,2000,01,02 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <hurd.h>
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
/* Read up to N chars into BUF from COOKIE.
Return how many chars were read, 0 for EOF or -1 for error. */
static ssize_t
readio (void *cookie, char *buf, size_t n)
{
mach_msg_type_number_t nread;
error_t err;
char *bufp = buf;
nread = n;
if (err = __io_read ((io_t) cookie, &bufp, &nread, -1, n))
return __hurd_fail (err);
if (bufp != buf)
{
memcpy (buf, bufp, nread);
__vm_deallocate (__mach_task_self (),
(vm_address_t) bufp, (vm_size_t) nread);
}
return nread;
}
/* Write up to N chars from BUF to COOKIE.
Return how many chars were written or -1 for error. */
static ssize_t
writeio (void *cookie, const char *buf, size_t n)
{
mach_msg_type_number_t wrote;
error_t err;
if (err = __io_write ((io_t) cookie, buf, n, -1, &wrote))
return __hurd_fail (err);
return wrote;
}
/* Move COOKIE's file position *POS bytes, according to WHENCE.
The current file position is stored in *POS.
Returns zero if successful, nonzero if not. */
static int
seekio (void *cookie,
#ifdef USE_IN_LIBIO
_IO_off64_t *pos,
#else
fpos_t *pos,
#endif
int whence)
{
error_t err = __io_seek ((file_t) cookie, *pos, whence, pos);
return err ? __hurd_fail (err) : 0;
}
/* Close the file associated with COOKIE.
Return 0 for success or -1 for failure. */
static int
closeio (void *cookie)
{
error_t error = __mach_port_deallocate (__mach_task_self (),
(mach_port_t) cookie);
if (error)
return __hurd_fail (error);
return 0;
}
#ifdef USE_IN_LIBIO
#include "../libio/libioP.h"
#define fopencookie _IO_fopencookie
#else
#define cookie_io_functions_t __io_functions
#endif
static const cookie_io_functions_t funcsio =
{ readio, writeio, seekio, closeio };
/* Open a stream on PORT. MODE is as for fopen. */
FILE *
__fopenport (mach_port_t port, const char *mode)
{
int pflags;
int needflags;
error_t err;
const char *m = mode;
switch (*m++)
{
case 'r':
needflags = O_READ;
break;
case 'w':
needflags = O_WRITE;
break;
case 'a':
needflags = O_WRITE|O_APPEND;
break;
default:
return NULL;
}
if (m[0] == '+' || (m[0] == 'b' && m[1] == '+'))
needflags |= O_RDWR;
/* Verify the PORT is valid allows the access MODE specifies. */
if (err = __io_get_openmodes (port, &pflags))
return __hurd_fail (err), NULL;
/* Check the access mode. */
if ((pflags & needflags) != needflags)
{
errno = EBADF;
return NULL;
}
return fopencookie ((void *) port, mode, funcsio);
}
weak_alias (__fopenport, fopenport)
|
GitWeb