1 /* Copyright (C) 1994,95,97,2000,01 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
24 /* Read up to N chars into BUF from COOKIE.
25 Return how many chars were read, 0 for EOF or -1 for error. */
27 readio (void *cookie, char *buf, size_t n)
29 mach_msg_type_number_t nread;
34 if (err = __io_read ((io_t) cookie, &bufp, &nread, -1, n))
35 return __hurd_fail (err);
39 memcpy (buf, bufp, nread);
40 __vm_deallocate (__mach_task_self (),
41 (vm_address_t) bufp, (vm_size_t) nread);
47 /* Write up to N chars from BUF to COOKIE.
48 Return how many chars were written or -1 for error. */
50 writeio (void *cookie, const char *buf, size_t n)
52 mach_msg_type_number_t wrote;
55 if (err = __io_write ((io_t) cookie, buf, n, -1, &wrote))
56 return __hurd_fail (err);
61 /* Move COOKIE's file position *POS bytes, according to WHENCE.
62 The current file position is stored in *POS.
63 Returns zero if successful, nonzero if not. */
76 /* XXX We don't really support large files on the Hurd. So if POS
77 doesn't fit in an `off_t', we'll return `-1' and set errno. EOVERFLOW
78 probably isn't the right error value, but seems appropriate here. */
79 if ((off_t) *pos != *pos)
81 __set_errno (EOVERFLOW);
85 error = __io_seek ((file_t) cookie, *pos, whence, &res);
87 return __hurd_fail (error);
92 /* Close the file associated with COOKIE.
93 Return 0 for success or -1 for failure. */
95 closeio (void *cookie)
97 error_t error = __mach_port_deallocate (__mach_task_self (),
98 (mach_port_t) cookie);
100 return __hurd_fail (error);
105 #include "../libio/libioP.h"
106 #define fopencookie _IO_fopencookie
108 #define cookie_io_functions_t __io_functions
110 static const cookie_io_functions_t funcsio =
111 { readio, writeio, seekio, closeio };
114 /* Open a stream on PORT. MODE is as for fopen. */
117 __fopenport (mach_port_t port, const char *mode)
123 const char *m = mode;
134 needflags = O_WRITE|O_APPEND;
139 if (m[0] == '+' || (m[0] == 'b' && m[1] == '+'))
142 /* Verify the PORT is valid allows the access MODE specifies. */
144 if (err = __io_get_openmodes (port, &pflags))
145 return __hurd_fail (err), NULL;
147 /* Check the access mode. */
148 if ((pflags & needflags) != needflags)
154 return fopencookie ((void *) port, mode, funcsio);
156 weak_alias (__fopenport, fopenport)