Returns a 13-element list giving the status info for a file, either
the file opened via FILEHANDLE or DIRHANDLE, or named by EXPR. If EXPR is
omitted, it stats
!). Returns the empty list if
stat fails. Typically
used as follows:
- = stat($filename);
Not all fields are supported on all filesystem types. Here are the meanings of the fields:
- 0 dev device number of filesystem
- 1 ino inode number
- 2 mode file mode (type and permissions)
- 3 nlink number of (hard) links to the file
- 4 uid numeric user ID of file's owner
- 5 gid numeric group ID of file's owner
- 6 rdev the device identifier (special files only)
- 7 size total size of file, in bytes
- 8 atime last access time in seconds since the epoch
- 9 mtime last modify time in seconds since the epoch
- 10 ctime inode change time in seconds since the epoch (*)
- 11 blksize preferred I/O size in bytes for interacting with the
- file (may vary from file to file)
- 12 blocks actual number of system-specific blocks allocated
- on disk (often, but not always, 512 bytes each)
(The epoch was at 00:00 January 1, 1970 GMT.)
(*) Not all fields are supported on all filesystem types. Notably, the ctime field is non-portable. In particular, you cannot expect it to be a "creation time"; see Files and Filesystems in perlport for details.
(This works on machines only for which the device number is negative under NFS.)
Because the mode contains both the file type and its permissions, you
should mask off the file type portion and (s)printf using a
if you want to see the real permissions.
In scalar context,
stat returns a boolean value indicating success
or failure, and, if successful, sets the information associated with
the special filehandle
The File::stat module provides a convenient, by-name access mechanism:
You can import symbolic mode constants (
) and functions
) from the Fcntl module:
You could write the last two using the
- # Permissions: read, write, execute, for user, group, others.
- S_IRWXU S_IRUSR S_IWUSR S_IXUSR
- S_IRWXG S_IRGRP S_IWGRP S_IXGRP
- S_IRWXO S_IROTH S_IWOTH S_IXOTH
- # Setuid/Setgid/Stickiness/SaveText.
- # Note that the exact meaning of these is system-dependent.
- S_ISUID S_ISGID S_ISVTX S_ISTXT
- # File types. Not all are necessarily available on
- # your system.
- S_IFREG S_IFDIR S_IFLNK S_IFBLK S_IFCHR
- S_IFIFO S_IFSOCK S_IFWHT S_ENFMT
- # The following are compatibility aliases for S_IRUSR,
- # S_IWUSR, and S_IXUSR.
- S_IREAD S_IWRITE S_IEXEC
- S_IMODE($mode) the part of $mode containing the permission
- bits and the setuid/setgid/sticky bits
- S_IFMT($mode) the part of $mode containing the file type
- which can be bit-anded with (for example)
- S_IFREG or with the following functions
- # The operators -f, -d, -l, -b, -c, -p, and -S.
- S_ISREG($mode) S_ISDIR($mode) S_ISLNK($mode)
- S_ISBLK($mode) S_ISCHR($mode) S_ISFIFO($mode) S_ISSOCK($mode)
- # No direct -X operator counterpart, but for the first one
- # the -g operator is often equivalent. The ENFMT stands for
- # record flocking enforcement, a platform-dependent feature.
- S_ISENFMT($mode) S_ISWHT($mode)
See your native chmod(2) and stat(2) documentation for more details
constants. To get status info for a symbolic link
instead of the target file behind the link, use the
Portability issues: stat in perlport.