source: trunk/kernel/syscalls/shared_include/shared_stat.h @ 594

Last change on this file since 594 was 594, checked in by alain, 3 years ago

Fix various bugs in sys_stat() and sys_mmap() functions.
Improve debug in other functions.

File size: 3.3 KB
Line 
1/*
2 * shared_stat.h - Shared structure used by the stat() syscall.
3 *
4 * Author  Alain Greiner (2016,2017,2018)
5 *
6 * Copyright (c) UPMC Sorbonne Universites
7 *
8 * This file is part of ALMOS-MKH.
9 *
10 * ALMOS-MKH is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; version 2.0 of the License.
13 *
14 * ALMOS-MKH is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with ALMOS-MKH; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24#ifndef _SHARED_STAT_H_
25#define _SHARED_STAT_H_
26
27/******************************************************************************************
28 * This structure define the informations associated to a file descriptor,
29 * returned to user space by the stat() syscall.
30 *****************************************************************************************/
31
32typedef struct stat
33{
34        unsigned int    st_dev;     /*! ID of device containing file                         */
35        unsigned int    st_ino;     /*! inode number                                         */
36        unsigned int    st_mode;    /*! bit vector defined below                             */
37        unsigned int    st_nlink;   /*! number of hard links                                 */
38        unsigned int    st_uid;     /*! user ID of owner                                     */
39        unsigned int    st_gid;     /*! group ID of owner                                    */
40        unsigned int    st_rdev;    /*! device ID (if special file)                          */
41        unsigned int    st_size;    /*! total size, in bytes                                 */
42        unsigned int    st_blksize; /*! blocksize for file system I/O                        */
43        unsigned int    st_blocks;  /*! number of allocated blocks                           */
44}
45stat_t;
46
47/******************************************************************************************
48 * The st_mode field contains informations on both access rights and file types.
49 * - access rights (defined by the inode <rights> field) are stored in st_mode[15:0]
50 * - file types (defined by the inode <type> field) are stored in st_mode[19:16]
51 * The following macros can be used to extract file type information.
52 *
53 * WARNING : these macros must be kept consistent with inode types in <vfs.h> file.
54 *****************************************************************************************/
55
56#define  S_ISREG(x)   ((((x)>>16) & 0xF) == 0)    /*! it is a regular file               */
57#define  S_ISDIR(x)   ((((x)>>16) & 0xF) == 1)    /*! it is a directory                  */
58#define  S_ISFIFO(x)  ((((x)>>16) & 0xF) == 2)    /*! it is a named pipe                 */
59#define  S_ISPIPE(x)  ((((x)>>16) & 0xF) == 3)    /*! it is an anonymous pipe            */
60#define  S_ISSOCK(x)  ((((x)>>16) & 0xF) == 4)    /*! it is a socket                     */
61#define  S_ISCHR(x)   ((((x)>>16) & 0xF) == 5)    /*! it is a character device           */
62#define  S_ISLNK(x)   ((((x)>>16) & 0xF) == 6)    /*! it is a symbolic link              */
63
64#endif /* _STAT_H_ */
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