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1/* Copyright (C) 1994-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
17
18#include <hurd.h>
19#include <stdio.h>
20#include <fcntl.h>
21#include <string.h>
22
23/* Read up to N chars into BUF from COOKIE.
24 Return how many chars were read, 0 for EOF or -1 for error. */
25static ssize_t
26readio (void *cookie, char *buf, size_t n)
27{
28 mach_msg_type_number_t nread;
29 error_t err;
30 char *bufp = buf;
31
32 nread = n;
33 if (err = __io_read ((io_t) cookie, &bufp, &nread, -1, n))
34 return __hurd_fail (err);
35
36 if (bufp != buf)
37 {
38 memcpy (buf, bufp, nread);
39 __vm_deallocate (__mach_task_self (),
40 (vm_address_t) bufp, (vm_size_t) nread);
41 }
42
43 return nread;
44}
45
46/* Write up to N chars from BUF to COOKIE.
47 Return how many chars were written or -1 for error. */
48static ssize_t
49writeio (void *cookie, const char *buf, size_t n)
50{
51 mach_msg_type_number_t wrote;
52 error_t err;
53
54 if (err = __io_write ((io_t) cookie, buf, n, -1, &wrote))
55 return __hurd_fail (err);
56
57 return wrote;
58}
59
60/* Move COOKIE's file position *POS bytes, according to WHENCE.
61 The current file position is stored in *POS.
62 Returns zero if successful, nonzero if not. */
63static int
64seekio (void *cookie,
65 off64_t *pos,
66 int whence)
67{
68 error_t err = __io_seek ((file_t) cookie, *pos, whence, pos);
69 return err ? __hurd_fail (err) : 0;
70}
71
72/* Close the file associated with COOKIE.
73 Return 0 for success or -1 for failure. */
74static int
75closeio (void *cookie)
76{
77 error_t error = __mach_port_deallocate (__mach_task_self (),
78 (mach_port_t) cookie);
79 if (error)
80 return __hurd_fail (error);
81 return 0;
82}
83
84#include "../libio/libioP.h"
85#define fopencookie _IO_fopencookie
86static const cookie_io_functions_t funcsio =
87{ readio, writeio, seekio, closeio };
88
89
90/* Open a stream on PORT. MODE is as for fopen. */
91
92FILE *
93__fopenport (mach_port_t port, const char *mode)
94{
95 int pflags;
96 int needflags;
97 error_t err;
98
99 const char *m = mode;
100
101 switch (*m++)
102 {
103 case 'r':
104 needflags = O_READ;
105 break;
106 case 'w':
107 needflags = O_WRITE;
108 break;
109 case 'a':
110 needflags = O_WRITE|O_APPEND;
111 break;
112 default:
113 return NULL;
114 }
115 if (m[0] == '+' || (m[0] == 'b' && m[1] == '+'))
116 needflags |= O_RDWR;
117
118 /* Verify the PORT is valid allows the access MODE specifies. */
119
120 if (err = __io_get_openmodes (port, &pflags))
121 return __hurd_fail (err), NULL;
122
123 /* Check the access mode. */
124 if ((pflags & needflags) != needflags)
125 {
126 errno = EBADF;
127 return NULL;
128 }
129
130 return fopencookie ((void *) port, mode, funcsio);
131}
132weak_alias (__fopenport, fopenport)
133

Warning: That file was not part of the compilation database. It may have many parsing errors.