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32 .\" @(#)stat.2 8.4 (Berkeley) 5/1/95
33 .\" $FreeBSD: src/lib/libc/sys/stat.2,v 1.16.2.7 2001/12/14 18:34:01 ru Exp $
49 .Fn stat "const char *path" "struct stat *sb"
51 .Fn lstat "const char *path" "struct stat *sb"
53 .Fn fstat "int fd" "struct stat *sb"
57 function obtains information about the file pointed to by
59 Read, write or execute
60 permission of the named file is not required, but all directories
61 listed in the path name leading to the file must be searchable.
66 except in the case where the named file is a symbolic link,
69 returns information about the link,
72 returns information about the file the link references.
76 obtains the same information about an open file
77 known by the file descriptor
82 argument is a pointer to a
88 and into which information is placed concerning the file.
91 dev_t st_dev; /* inode's device */
92 ino_t st_ino; /* inode's number */
93 mode_t st_mode; /* inode protection mode */
94 nlink_t st_nlink; /* number of hard links */
95 uid_t st_uid; /* user ID of the file's owner */
96 gid_t st_gid; /* group ID of the file's group */
97 dev_t st_rdev; /* device type */
99 struct timespec st_atimespec; /* time of last access */
100 struct timespec st_mtimespec; /* time of last data modification */
101 struct timespec st_ctimespec; /* time of last file status change */
103 time_t st_atime; /* time of last access */
104 long st_atimensec; /* nsec of last access */
105 time_t st_mtime; /* time of last data modification */
106 long st_mtimensec; /* nsec of last data modification */
107 time_t st_ctime; /* time of last file status change */
108 long st_ctimensec; /* nsec of last file status change */
110 off_t st_size; /* file size, in bytes */
111 int64_t st_blocks; /* blocks allocated for file */
112 u_int32_t st_blksize; /* optimal blocksize for I/O */
113 u_int32_t st_flags; /* user defined flags for file */
114 u_int32_t st_gen; /* file generation number */
118 The time-related fields of
121 .Bl -tag -width XXXst_mtime
123 Time when file data last accessed.
131 Time when file data last modified.
139 Time when file status was last changed (inode data modification).
155 is not defined, the time-related fields are defined as:
157 #ifndef _POSIX_SOURCE
158 #define st_atime st_atimespec.tv_sec
159 #define st_mtime st_mtimespec.tv_sec
160 #define st_ctime st_ctimespec.tv_sec
164 The size-related fields of the
167 .Bl -tag -width XXXst_blksize
169 The optimal I/O block size for the file.
171 The actual number of blocks allocated for the file in 512-byte units.
172 As short symbolic links are stored in the inode, this number may
176 The status information word
178 has the following bits:
180 #define S_IFMT 0170000 /* type of file */
181 #define S_IFIFO 0010000 /* named pipe (fifo) */
182 #define S_IFCHR 0020000 /* character special */
183 #define S_IFDIR 0040000 /* directory */
184 #define S_IFBLK 0060000 /* block special */
185 #define S_IFREG 0100000 /* regular */
186 #define S_IFLNK 0120000 /* symbolic link */
187 #define S_IFSOCK 0140000 /* socket */
188 #define S_IFWHT 0160000 /* whiteout */
189 #define S_ISUID 0004000 /* set user id on execution */
190 #define S_ISGID 0002000 /* set group id on execution */
191 #define S_ISVTX 0001000 /* save swapped text even after use */
192 #define S_IRUSR 0000400 /* read permission, owner */
193 #define S_IWUSR 0000200 /* write permission, owner */
194 #define S_IXUSR 0000100 /* execute/search permission, owner */
197 For a list of access modes, see
205 Previous versions of the system used different types for the
222 A component of the path prefix is not a directory.
223 .It Bq Er ENAMETOOLONG
224 A component of a pathname exceeded 255 characters,
225 or an entire path name exceeded 1023 characters.
227 The named file does not exist.
229 Search permission is denied for a component of the path prefix.
231 Too many symbolic links were encountered in translating the pathname.
236 points to an invalid address.
238 An I/O error occurred while reading from or writing to the file system.
246 is not a valid open file descriptor.
249 points to an invalid address.
251 An I/O error occurred while reading from or writing to the file system.
262 to a socket (and thus to a pipe)
263 returns a zeroed buffer,
264 except for the blocksize field,
265 and a unique device and inode number.
271 function calls are expected to conform to
278 function call appeared in
282 function call appeared in