| 1 | /* |
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| 2 | * shared_stat.h - Shared structure used by the stat() syscall. |
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| 3 | * |
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| 4 | * Author Alain Greiner (2016,2017,2018) |
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| 5 | * |
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| 6 | * Copyright (c) UPMC Sorbonne Universites |
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| 7 | * |
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| 8 | * This file is part of ALMOS-MKH. |
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| 9 | * |
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| 10 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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| 11 | * under the terms of the GNU General Public License as published by |
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| 12 | * the Free Software Foundation; version 2.0 of the License. |
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| 13 | * |
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| 14 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 17 | * General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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| 21 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 22 | */ |
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| 23 | |
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| 24 | #ifndef _SHARED_STAT_H_ |
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| 25 | #define _SHARED_STAT_H_ |
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| 26 | |
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| 27 | /****************************************************************************************** |
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| 28 | * This structure define the informations associated to a file descriptor, |
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| 29 | * returned to user space by the stat() syscall. |
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| 30 | * |
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| 31 | * The st_mode field contains informations on both access rights and file types. |
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| 32 | * - access rights (defined by the inode <rights> field) are stored in st_mode[15:0] |
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| 33 | * - file types (defined by the inode <type> field) are stored in st_mode[19:16] |
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| 34 | *****************************************************************************************/ |
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| 35 | |
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| 36 | struct stat |
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| 37 | { |
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| 38 | unsigned int st_dev; /*! ID of device containing file */ |
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| 39 | unsigned int st_ino; /*! inode number */ |
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| 40 | unsigned int st_mode; /*! bit vector defined below */ |
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| 41 | unsigned int st_nlink; /*! number of hard links */ |
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| 42 | unsigned int st_uid; /*! user ID of owner */ |
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| 43 | unsigned int st_gid; /*! group ID of owner */ |
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| 44 | unsigned int st_rdev; /*! device ID (if special file) */ |
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| 45 | unsigned int st_size; /*! total size, in bytes */ |
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| 46 | unsigned int st_blksize; /*! blocksize for file system I/O */ |
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| 47 | unsigned int st_blocks; /*! number of allocated blocks */ |
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| 48 | }; |
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| 49 | |
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| 50 | /****************************************************************************************** |
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| 51 | * The following macros can be used to extract file type information. |
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| 52 | * |
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| 53 | * WARNING : these macros must be kept consistent with inode types in <vfs.h> file. |
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| 54 | * and with types in <dirent.h> file. |
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| 55 | *****************************************************************************************/ |
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| 56 | |
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| 57 | #define S_ISREG(x) ((((x)>>16) & 0xF) == 0) /*! it is a regular file */ |
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| 58 | #define S_ISDIR(x) ((((x)>>16) & 0xF) == 1) /*! it is a directory */ |
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| 59 | #define S_ISFIFO(x) ((((x)>>16) & 0xF) == 2) /*! it is a named pipe */ |
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| 60 | #define S_ISPIPE(x) ((((x)>>16) & 0xF) == 3) /*! it is an anonymous pipe */ |
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| 61 | #define S_ISSOCK(x) ((((x)>>16) & 0xF) == 4) /*! it is a socket */ |
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| 62 | #define S_ISCHR(x) ((((x)>>16) & 0xF) == 5) /*! it is a character device */ |
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| 63 | #define S_ISBLK(x) ((((x)>>16) & 0xF) == 6) /*! it is a block device */ |
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| 64 | #define S_ISLNK(x) ((((x)>>16) & 0xF) == 7) /*! it is a symbolic link */ |
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| 65 | |
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| 66 | #endif /* _STAT_H_ */ |
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