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nuttx/include/sys/stat.h
Xiang Xiao 54eabf9616 libc: Add mknod implementation 
https://pubs.opengroup.org/onlinepubs/007904875/functions/mknod.html

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
2021-11-28 23:31:16 +01:00

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/****************************************************************************
* include/sys/stat.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
#ifndef __INCLUDE_SYS_STAT_H
#define __INCLUDE_SYS_STAT_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <time.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* mode_t bit settings (most of these do not apply to NuttX). This assumes
* that the full size of a mode_t is 16-bits. (However, mode_t must be size
* 'int' because it is promoted to size int when passed in varargs).
*
* TTTT ...U UUGG GOOO
*
* Bits 0-2: Permissions for others
* Bits 3-5: Group permissions
* Bits 6-8: Owner permissions
* Bits 9-11: Not used
* Bits 12-15: File type bits
*/
#define S_IXOTH (1 << 0) /* Bits 0-2: Permissions for others: RWX */
#define S_IWOTH (1 << 1)
#define S_IROTH (1 << 2)
#define S_IRWXO (7 << 0)
#define S_IXGRP (1 << 3) /* Bits 3-5: Group permissions: RWX */
#define S_IWGRP (1 << 4)
#define S_IRGRP (1 << 5)
#define S_IRWXG (7 << 3)
#define S_IXUSR (1 << 6) /* Bits 6-8: Owner permissions: RWX */
#define S_IWUSR (1 << 7)
#define S_IRUSR (1 << 8)
#define S_IRWXU (7 << 6)
#define S_IREAD S_IRUSR /* Obsolete synonym provided for BSD compatibility. */
#define S_IWRITE S_IWUSR /* Obsolete synonym provided for BSD compatibility. */
#define S_IEXEC S_IXUSR /* Obsolete synonym provided for BSD compatibility. */
#define S_ISVTX (1 << 9) /* "Sticky" bit (not used) */
#define S_ISGID (1 << 10) /* Set group ID bit (not used)*/
#define S_ISUID (1 << 11) /* Set UID bit (not used) */
#define S_IFIFO (1 << 12) /* Bits 12-15: File type bits (not all used) */
#define S_IFCHR (2 << 12)
#define S_IFSEM (3 << 12)
#define S_IFDIR (4 << 12)
#define S_IFMQ (5 << 12)
#define S_IFBLK (6 << 12)
#define S_IFSHM (7 << 12)
#define S_IFREG (8 << 12)
#define S_IFMTD (9 << 12)
#define S_IFLNK (10 << 12)
#define S_IFSOCK (12 << 12)
#define S_IFMT (15 << 12)
/* File type macros that operate on an instance of mode_t */
#define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
#define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
#define S_ISSEM(m) (((m) & S_IFMT) == S_IFSEM)
#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
#define S_ISMQ(m) (((m) & S_IFMT) == S_IFMQ)
#define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
#define S_ISSHM(m) (((m) & S_IFMT) == S_IFSHM)
#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
#define S_ISMTD(m) (((m) & S_IFMT) == S_IFMTD)
#define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
#define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
/* These are from POSIX.1b. If the objects are not implemented using separate
* distinct file types, the macros always will evaluate to zero. Unlike the
* other S_* macros the following three take a pointer to a `struct stat'
* object as the argument.
*/
#define S_TYPEISSEM(buf) S_ISSEM((buf)->st_mode)
#define S_TYPEISMQ(buf) S_ISMQ((buf)->st_mode)
#define S_TYPEISSHM(buf) S_ISSHM((buf)->st_mode)
/* Special value for tv_nsec field of timespec */
#define UTIME_NOW ((1l << 30) - 1l)
#ifndef __cplusplus
# define UTIME_OMIT ((1l << 30) - 2l)
#endif
/* The following macros are required by POSIX to achieve backward
* compatibility with earlier versions of struct stat.
*/
#define st_atime st_atim.tv_sec
#define st_ctime st_ctim.tv_sec
#define st_mtime st_mtim.tv_sec
#if defined(CONFIG_FS_LARGEFILE) && defined(CONFIG_HAVE_LONG_LONG)
# define stat64 stat
# define fstat64 fstat
# define lstat64 lstat
# define fstatat64 fstatat
#endif
/****************************************************************************
* Type Definitions
****************************************************************************/
/* This is the simplified struct stat as returned by stat() and fstat().
* This structure provides information about a specific file or directory in
* the file system.
*/
struct stat
{
/* Required, standard fields */
dev_t st_dev; /* Device ID of device containing file */
ino_t st_ino; /* File serial number */
mode_t st_mode; /* File type, attributes, and access mode bits */
nlink_t st_nlink; /* Number of hard links to the file */
uid_t st_uid; /* User ID of file */
gid_t st_gid; /* Group ID of file */
dev_t st_rdev; /* Device ID (if file is character or block special) */
off_t st_size; /* Size of file/directory, in bytes */
struct timespec st_atim; /* Time of last access */
struct timespec st_mtim; /* Time of last modification */
struct timespec st_ctim; /* Time of last status change */
blksize_t st_blksize; /* Block size used for filesystem I/O */
blkcnt_t st_blocks; /* Number of blocks allocated */
};
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
int mkdir(FAR const char *pathname, mode_t mode);
int mkfifo(FAR const char *pathname, mode_t mode);
int mknod(FAR const char *path, mode_t mode, dev_t dev);
int stat(FAR const char *path, FAR struct stat *buf);
int lstat(FAR const char *path, FAR struct stat *buf);
int fstat(int fd, FAR struct stat *buf);
int chmod(FAR const char *path, mode_t mode);
int lchmod(FAR const char *path, mode_t mode);
int fchmod(int fd, mode_t mode);
int utimens(FAR const char *path, const struct timespec times[2]);
int lutimens(FAR const char *path, const struct timespec times[2]);
int futimens(int fd, const struct timespec times[2]);
mode_t umask(mode_t mask);
mode_t getumask(void);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __INCLUDE_SYS_STAT_H */
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