Changes the permissions of a list of files. The first element of the list must be the numerical mode, which should probably be an octal number, and which definitely should not be a string of octal digits:
0644 is okay,
'0644' is not. Returns the number of files successfully changed. See also "oct", if all you have is a string.
$cnt = chmod 0755, 'foo', 'bar'; chmod 0755, @executables; $mode = '0644'; chmod $mode, 'foo'; # !!! sets mode to # --w----r-T $mode = '0644'; chmod oct($mode), 'foo'; # this is better $mode = 0644; chmod $mode, 'foo'; # this is best
On systems that support fchmod, you might pass file handles among the files. On systems that don't support fchmod, passing file handles produces a fatal error at run time.
open(my $fh, "<", "foo"); my $perm = (stat $fh) & 07777; chmod($perm | 0600, $fh);
You can also import the symbolic
S_I* constants from the Fcntl module:
use Fcntl ':mode'; chmod S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH, @executables; # This is identical to the chmod 0755 of the above example.