ef0a265086
* VFS and installed MFSes must be in sync before and after this change * Use struct stat from NetBSD. It requires adding new STAT, FSTAT and LSTAT syscalls. Libc modification is both backward and forward compatible. Also new struct stat uses modern field sizes to avoid ABI incompatibility, when we update uid_t, gid_t and company. Exceptions are ino_t and off_t in old libc (though paddings added).
141 lines
5.6 KiB
C
141 lines
5.6 KiB
C
/* The <sys/stat.h> header defines a struct that is used in the stat() and
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* fstat functions. The information in this struct comes from the i-node of
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* some file. These calls are the only approved way to inspect i-nodes.
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*/
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#ifndef _STAT_H
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#define _STAT_H
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#ifndef _TYPES_H
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#include <minix/types.h>
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#endif
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struct stat {
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big_dev_t st_dev; /* inode's device */
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big_mode_t st_mode; /* inode protection mode */
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ino_t st_ino; /* inode's number */
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u32_t padding; /* inode's padding */
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big_nlink_t st_nlink; /* number of hard links */
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big_uid_t st_uid; /* user ID of the file's owner */
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big_gid_t st_gid; /* group ID of the file's group */
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big_dev_t st_rdev; /* device type */
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#if defined(_NETBSD_SOURCE)
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struct timespec st_atimespec;/* time of last access */
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struct timespec st_mtimespec;/* time of last data modification */
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struct timespec st_ctimespec;/* time of last file status change */
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struct timespec st_birthtimespec; /* time of creation */
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#else
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time_t st_atime; /* time of last access */
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long st_atimensec; /* nsec of last access */
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time_t st_mtime; /* time of last data modification */
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long st_mtimensec; /* nsec of last data modification */
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time_t st_ctime; /* time of last file status change */
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long st_ctimensec; /* nsec of last file status change */
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time_t st_birthtime; /* time of creation */
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long st_birthtimensec; /* nsec of time of creation */
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#endif
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off_t st_size; /* file size, in bytes */
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u32_t padding2; /* size padding */
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blkcnt_t st_blocks; /* blocks allocated for file */
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u32_t padding3; /* blocks padding */
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blksize_t st_blksize; /* optimal blocksize for I/O */
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u32_t st_flags; /* user defined flags for file */
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u32_t st_gen; /* file generation number */
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u32_t st_spare[2];
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};
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struct minix_prev_stat {
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dev_t st_dev; /* major/minor device number */
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ino_t st_ino; /* i-node number */
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mode_t st_mode; /* file mode, protection bits, etc. */
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nlink_t st_nlink; /* # links; */
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uid_t st_uid; /* uid of the file's owner */
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short int st_gid; /* gid; TEMPORARY HACK: should be gid_t */
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dev_t st_rdev;
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off_t st_size; /* file size */
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time_t st_atime; /* time of last access */
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time_t st_mtime; /* time of last data modification */
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time_t st_ctime; /* time of last file status change */
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};
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/* Copy field by field because of st_gid type mismath and
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* difference in order after atime.
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*/
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#define COPY_PREV_STAT_TO_NEW(dest, src)\
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(dest)->st_dev = (src)->st_dev;\
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(dest)->st_ino = (src)->st_ino;\
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(dest)->st_mode = (src)->st_mode;\
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(dest)->st_nlink = (src)->st_nlink;\
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(dest)->st_uid = (src)->st_uid;\
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(dest)->st_gid = (src)->st_gid;\
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(dest)->st_rdev = (src)->st_rdev;\
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(dest)->st_size = (src)->st_size;\
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(dest)->st_atime = (src)->st_atime;\
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(dest)->st_mtime = (src)->st_mtime;\
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(dest)->st_ctime = (src)->st_ctime
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#define S_BLKSIZE 512 /* block size used in the stat struct */
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/* Traditional mask definitions for st_mode. */
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#define S_IFMT 0170000 /* type of file */
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#define S_IFSOCK 0140000 /* socket */
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#define S_IFLNK 0120000 /* symbolic link */
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#define S_IFREG 0100000 /* regular */
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#define S_IFBLK 0060000 /* block special */
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#define S_IFDIR 0040000 /* directory */
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#define S_IFCHR 0020000 /* character special */
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#define S_IFIFO 0010000 /* this is a FIFO */
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#define S_ISUID 0004000 /* set user id on execution */
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#define S_ISGID 0002000 /* set group id on execution */
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#define S_ISVTX 0001000 /* save swapped text even after use */
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/* POSIX masks for st_mode. */
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#define S_IRWXU 00700 /* owner: rwx------ */
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#define S_IRUSR 00400 /* owner: r-------- */
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#define S_IWUSR 00200 /* owner: -w------- */
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#define S_IXUSR 00100 /* owner: --x------ */
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#define S_IRWXG 00070 /* group: ---rwx--- */
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#define S_IRGRP 00040 /* group: ---r----- */
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#define S_IWGRP 00020 /* group: ----w---- */
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#define S_IXGRP 00010 /* group: -----x--- */
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#define S_IRWXO 00007 /* others: ------rwx */
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#define S_IROTH 00004 /* others: ------r-- */
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#define S_IWOTH 00002 /* others: -------w- */
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#define S_IXOTH 00001 /* others: --------x */
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/* Synonyms for above. */
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#define S_IEXEC S_IXUSR
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#define S_IWRITE S_IWUSR
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#define S_IREAD S_IRUSR
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/* The following macros test st_mode (from POSIX Sec. 5.6.1.1). */
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#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) /* is a reg file */
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#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) /* is a directory */
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#define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR) /* is a char spec */
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#define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK) /* is a block spec */
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#define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK) /* is a symlink */
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#define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO) /* is a pipe/FIFO */
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#define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK) /* is a socket */
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#define DEFFILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
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#define ALLPERMS (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO)
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/* Function Prototypes. */
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_PROTOTYPE( int chmod, (const char *_path, mode_t _mode) );
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_PROTOTYPE( int fchmod, (int fd, mode_t _mode) );
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_PROTOTYPE( int fstat, (int _fildes, struct stat *_buf) );
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_PROTOTYPE( int mkdir, (const char *_path, mode_t _mode) );
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_PROTOTYPE( int mkfifo, (const char *_path, mode_t _mode) );
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_PROTOTYPE( int stat, (const char *_path, struct stat *_buf) );
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_PROTOTYPE( mode_t umask, (mode_t _cmask) );
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/* Open Group Base Specifications Issue 6 (not complete) */
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_PROTOTYPE( int lstat, (const char *_path, struct stat *_buf) );
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#endif /* _STAT_H */
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