gzip/sample/ztouch

#! /usr/local/bin/perl
# Set the timestamp of a gzip'ed file from that stored in the file.
# usage: ztouch files...

foreach $file (@ARGV) {
    open (FILE, $file);
    read (FILE, $_, 8);
    ($magic, $method, $flags, $time) = unpack ("A2C2V", $_);
    if ($magic eq "\037\213") {
        utime ($time, $time, $file);
    }
    else {
        warn "$file is not compressed with gzip!\n";
    }
}