UNIX for Advanced & Expert Users

/usr/lib/perl5/5.8.0/i386-linux-thread-multi/auto/POSIX/umask.al
/usr/share/man/man1/umask.1.gz
/usr/share/man/man2/umask.2.gz
/usr/share/man/man3/getumask.3.gz

[root@maverickds POSIX]# cat umask.al
# NOTE: Derived from ../../lib/POSIX.pm.
# Changes made here will be lost when autosplit is run again.
# See AutoSplit.pm.
package POSIX;

#line 581 "../../lib/POSIX.pm (autosplit into ../../lib/auto/POSIX/umask.al)"
sub umask {
    usage "umask(mask)" if @_ != 1;
    CORE::umask($_[0]);
}

# end of POSIX::umask
1;

sub chmod {
    usage "chmod(mode, filename)" if @_ != 2;
    CORE::chmod($_[0], $_[1]);
}
and
sub umask {
    usage "umask(mask)" if @_ != 1;
    CORE::umask($_[0]);
}

     chmod LIST
             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 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

             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.