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File::stat(3pm) Perl Programmers Reference Guide File::stat(3pm)
NAME
File::stat - by-name interface to Perl's built-in stat() functions
SYNOPSIS
use File::stat;
$st = stat($file) or die "No $file: $!";
if ( ($st->mode & 0111) && $st->nlink > 1) ) {
print "$file is executable with lotsa links\n";
}
if ( -x $st ) {
print "$file is executable\n";
}
use Fcntl "S_IRUSR";
if ( $st->cando(S_IRUSR, 1) ) {
print "My effective uid can read $file\n";
}
use File::stat qw(:FIELDS);
stat($file) or die "No $file: $!";
if ( ($st_mode & 0111) && ($st_nlink > 1) ) {
print "$file is executable with lotsa links\n";
}
DESCRIPTION
This module's default exports override the core stat() and lstat() functions, replacing
them with versions that return "File::stat" objects. This object has methods that return
the similarly named structure field name from the stat(2) function; namely, dev, ino,
mode, nlink, uid, gid, rdev, size, atime, mtime, ctime, blksize, and blocks.
As of version 1.02 (provided with perl 5.12) the object provides "-X" overloading, so you
can call filetest operators ("-f", "-x", and so on) on it. It also provides a "->cando"
method, called like
$st->cando( ACCESS, EFFECTIVE )
where ACCESS is one of "S_IRUSR", "S_IWUSR" or "S_IXUSR" from the Fcntl module, and
EFFECTIVE indicates whether to use effective (true) or real (false) ids. The method
interprets the "mode", "uid" and "gid" fields, and returns whether or not the current
process would be allowed the specified access.
If you don't want to use the objects, you may import the "->cando" method into your
namespace as a regular function called "stat_cando". This takes an arrayref containing
the return values of "stat" or "lstat" as its first argument, and interprets it for you.
You may also import all the structure fields directly into your namespace as regular
variables using the :FIELDS import tag. (Note that this still overrides your stat() and
lstat() functions.) Access these fields as variables named with a preceding "st_" in
front their method names. Thus, "$stat_obj->dev()" corresponds to $st_dev if you import
the fields.
To access this functionality without the core overrides, pass the "use" an empty import
list, and then access function functions with their full qualified names. On the other
hand, the built-ins are still available via the "CORE::" pseudo-package.
BUGS
As of Perl 5.8.0 after using this module you cannot use the implicit $_ or the special
filehandle "_" with stat() or lstat(), trying to do so leads into strange errors. The
workaround is for $_ to be explicit
my $stat_obj = stat $_;
and for "_" to explicitly populate the object using the unexported and undocumented
populate() function with CORE::stat():
my $stat_obj = File::stat::populate(CORE::stat(_));
ERRORS
-%s is not implemented on a File::stat object
The filetest operators "-t", "-T" and "-B" are not implemented, as they require more
information than just a stat buffer.
WARNINGS
These can all be disabled with
no warnings "File::stat";
File::stat ignores use filetest 'access'
You have tried to use one of the "-rwxRWX" filetests with "use filetest 'access'" in
effect. "File::stat" will ignore the pragma, and just use the information in the
"mode" member as usual.
File::stat ignores VMS ACLs
VMS systems have a permissions structure that cannot be completely represented in a
stat buffer, and unlike on other systems the builtin filetest operators respect this.
The "File::stat" overloads, however, do not, since the information required is not
available.
NOTE
While this class is currently implemented using the Class::Struct module to build a
struct-like class, you shouldn't rely upon this.
AUTHOR
Tom Christiansen
perl v5.16.3 2013-03-04 File::stat(3pm)
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2024-11-23 06:30 @3.147.86.143 CrawledBy Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)