1 /* The <sys/stat.h> header defines a struct that is used in the stat() and
2 * fstat functions. The information in this struct comes from the i-node of
3 * some file. These calls are the only approved way to inspect i-nodes.
10 dev_t st_dev; /* major/minor device number */
11 ino_t st_ino; /* i-node number */
12 mode_t st_mode; /* file mode, protection bits, etc. */
13 short int st_nlink; /* # links; TEMPORARY HACK: should be nlink_t*/
14 uid_t st_uid; /* uid of the file's owner */
15 short int st_gid; /* gid; TEMPORARY HACK: should be gid_t */
17 off_t st_size; /* file size */
18 time_t st_atime; /* time of last access */
19 time_t st_mtime; /* time of last data modification */
20 time_t st_ctime; /* time of last file status change */
23 /* Traditional mask definitions for st_mode. */
24 /* The ugly casts on only some of the definitions are to avoid suprising sign
25 * extensions such as S_IFREG != (mode_t) S_IFREG when ints are 32 bits.
27 #define S_IFMT ((mode_t) 0170000) /* type of file */
28 #define S_IFREG ((mode_t) 0100000) /* regular */
29 #define S_IFBLK 0060000 /* block special */
30 #define S_IFDIR 0040000 /* directory */
31 #define S_IFCHR 0020000 /* character special */
32 #define S_IFIFO 0010000 /* this is a FIFO */
33 #define S_ISUID 0004000 /* set user id on execution */
34 #define S_ISGID 0002000 /* set group id on execution */
35 /* next is reserved for future use */
36 #define S_ISVTX 01000 /* save swapped text even after use */
38 /* POSIX masks for st_mode. */
39 #define S_IRWXU 00700 /* owner: rwx------ */
40 #define S_IRUSR 00400 /* owner: r-------- */
41 #define S_IWUSR 00200 /* owner: -w------- */
42 #define S_IXUSR 00100 /* owner: --x------ */
44 #define S_IRWXG 00070 /* group: ---rwx--- */
45 #define S_IRGRP 00040 /* group: ---r----- */
46 #define S_IWGRP 00020 /* group: ----w---- */
47 #define S_IXGRP 00010 /* group: -----x--- */
49 #define S_IRWXO 00007 /* others: ------rwx */
50 #define S_IROTH 00004 /* others: ------r-- */
51 #define S_IWOTH 00002 /* others: -------w- */
52 #define S_IXOTH 00001 /* others: --------x */
54 /* The following macros test st_mode (from POSIX Sec. 5.6.1.1). */
55 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) /* is a reg file */
56 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) /* is a directory */
57 #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR) /* is a char spec */
58 #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK) /* is a block spec */
59 #define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO) /* is a pipe/FIFO */
62 /* Function Prototypes. */
67 _PROTOTYPE( int chmod, (const char *_path, Mode_t _mode) );
68 _PROTOTYPE( int fstat, (int _fildes, struct stat *_buf) );
69 _PROTOTYPE( int mkdir, (const char *_path, int _mode) );
70 _PROTOTYPE( int mkfifo, (const char *_path, int _mode) );
71 _PROTOTYPE( int stat , (const char *_path, struct stat *_buf) );
72 _PROTOTYPE( mode_t umask, (int _cmask) );