source: mainline/uspace/lib/posix/source/sys/stat.c@ ca4c6ec1

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since ca4c6ec1 was a3da2b2, checked in by Vojtech Horky <vojtechhorky@…>, 13 years ago

Introduce include/ and source/ directories into libposix

  • Property mode set to 100644
File size: 4.2 KB
RevLine 
[53900ab]1/*
2 * Copyright (c) 2011 Jiri Zarevucky
[4f4b4e7]3 * Copyright (c) 2011 Petr Koupy
[53900ab]4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * - Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * - Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * - The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
[4f4b4e7]30/** @addtogroup libposix
31 * @{
32 */
[4cf8ca6]33/** @file File status handling.
[4f4b4e7]34 */
35
[53900ab]36#define LIBPOSIX_INTERNAL
37
[9b1503e]38#include "../internal/common.h"
[a3da2b2]39#include "posix/sys/stat.h"
[a6d908c1]40
[a3da2b2]41#include "posix/errno.h"
42#include "libc/mem.h"
[53900ab]43
[4f4b4e7]44/**
[3daf2c31]45 * Convert HelenOS stat struct into POSIX stat struct (if possible).
[4f4b4e7]46 *
[3daf2c31]47 * @param dest POSIX stat struct.
48 * @param src HelenOS stat struct.
[53900ab]49 */
[4f4b4e7]50static void stat_to_posix(struct posix_stat *dest, struct stat *src)
[53900ab]51{
52 memset(dest, 0, sizeof(struct posix_stat));
53
[49160c4]54 dest->st_dev = src->service;
[eca52a8]55 dest->st_ino = src->index;
[53900ab]56
57 /* HelenOS doesn't support permissions, so we set them all */
58 dest->st_mode = S_IRWXU | S_IRWXG | S_IRWXO;
[4f4b4e7]59 if (src->is_file) {
[53900ab]60 dest->st_mode |= S_IFREG;
[4f4b4e7]61 }
62 if (src->is_directory) {
[53900ab]63 dest->st_mode |= S_IFDIR;
[4f4b4e7]64 }
[53900ab]65
66 dest->st_nlink = src->lnkcnt;
67 dest->st_size = src->size;
68}
69
[4f4b4e7]70/**
[3daf2c31]71 * Retrieve file status for file associated with file descriptor.
[4f4b4e7]72 *
[3daf2c31]73 * @param fd File descriptor of the opened file.
74 * @param st Status structure to be filled with information.
75 * @return Zero on success, -1 otherwise.
[4f4b4e7]76 */
[53900ab]77int posix_fstat(int fd, struct posix_stat *st)
78{
79 struct stat hst;
[ec18957a]80 int rc = fstat(fd, &hst);
81 if (rc < 0) {
[4cf8ca6]82 /* fstat() returns negative error code instead of using errno. */
[ec18957a]83 errno = -rc;
[53900ab]84 return -1;
85 }
86 stat_to_posix(st, &hst);
87 return 0;
88}
89
[39a7bfa]90/**
[3daf2c31]91 * Retrieve file status for symbolic link.
[39a7bfa]92 *
[3daf2c31]93 * @param path Path to the symbolic link.
94 * @param st Status structure to be filled with information.
95 * @return Zero on success, -1 otherwise.
[39a7bfa]96 */
[4cf8ca6]97int posix_lstat(const char *restrict path, struct posix_stat *restrict st)
[39a7bfa]98{
[3daf2c31]99 /* There are currently no symbolic links in HelenOS. */
100 return posix_stat(path, st);
[39a7bfa]101}
102
[4f4b4e7]103/**
[3daf2c31]104 * Retrieve file status for regular file (or symbolic link target).
[4f4b4e7]105 *
[3daf2c31]106 * @param path Path to the file/link.
107 * @param st Status structure to be filled with information.
108 * @return Zero on success, -1 otherwise.
[4f4b4e7]109 */
[4cf8ca6]110int posix_stat(const char *restrict path, struct posix_stat *restrict st)
[53900ab]111{
112 struct stat hst;
[ec18957a]113 int rc = stat(path, &hst);
114 if (rc < 0) {
[4cf8ca6]115 /* stat() returns negative error code instead of using errno. */
[ec18957a]116 errno = -rc;
[53900ab]117 return -1;
118 }
119 stat_to_posix(st, &hst);
120 return 0;
121}
122
[39a7bfa]123/**
[3daf2c31]124 * Change permission bits for the file if possible.
[39a7bfa]125 *
[3daf2c31]126 * @param path Path to the file.
127 * @param mode Permission bits to be set.
128 * @return Zero on success, -1 otherwise.
[39a7bfa]129 */
130int posix_chmod(const char *path, mode_t mode)
131{
[3daf2c31]132 /* HelenOS doesn't support permissions, return success. */
133 return 0;
[39a7bfa]134}
135
136/**
[3daf2c31]137 * Set the file mode creation mask of the process.
[39a7bfa]138 *
[3daf2c31]139 * @param mask Set permission bits are cleared in the related creation
140 * functions. Non-permission bits are ignored.
141 * @return Previous file mode creation mask.
[39a7bfa]142 */
143mode_t posix_umask(mode_t mask)
144{
[3daf2c31]145 /* HelenOS doesn't support permissions, return empty mask. */
146 return 0;
[39a7bfa]147}
148
[4f4b4e7]149/** @}
150 */
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