source: mainline/uspace/lib/libc/include/unistd.h@ d359e227

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since d359e227 was 2b88074b, checked in by Martin Decky <martin@…>, 16 years ago

vfs: file descriptors housekeeping changes

  • add support for allocating new file descriptors from the end of the fd range (O_DESC)
  • add support for assigning of an already opened file to a free file descriptor

vfs: VFS_OUT_CLOSE is called only when the file reference count is about to drop to zero
vfs: implement VFS_IN_DUP

libc: optimize current working directory housekeeping

  • using opendir() was an overkill
  • allocate current working directory file descriptor from the end of the fd range using O_DESC (so it doesn't mess with the well-known descriptors 0, 1 and 2)

libc: implement dup2() (via VFS_IN_DUP)

getvc: change stdin/stdout/stderr by a slightly more elegant way (using dup2())

  • Property mode set to 100644
File size: 2.3 KB
Line 
1/*
2 * Copyright (c) 2005 Martin Decky
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup libc
30 * @{
31 */
32/** @file
33 */
34
35#ifndef LIBC_UNISTD_H_
36#define LIBC_UNISTD_H_
37
38#include <sys/types.h>
39#include <libarch/config.h>
40
41#ifndef NULL
42 #define NULL 0
43#endif
44
45#define getpagesize() (PAGE_SIZE)
46
47#ifndef SEEK_SET
48 #define SEEK_SET 0
49 #define SEEK_CUR 1
50 #define SEEK_END 2
51#endif
52
53extern int dup2(int oldfd, int newfd);
54
55extern ssize_t write(int, const void *, size_t);
56extern ssize_t read(int, void *, size_t);
57
58extern off_t lseek(int, off_t, int);
59extern int ftruncate(int, off_t);
60
61extern int close(int);
62extern int fsync(int);
63extern int unlink(const char *);
64
65extern char *getcwd(char *buf, size_t);
66extern int rmdir(const char *);
67extern int chdir(const char *);
68
69extern void _exit(int status) __attribute__ ((noreturn));
70extern int usleep(unsigned long usec);
71extern unsigned int sleep(unsigned int seconds);
72
73#endif
74
75/** @}
76 */
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