Find installed Perl interpreters (shell script!)

Category:	CGI Programming
Author/Contact Info	Christian Renz <crenz at web42.com>
Description:	Okay -- this is a shell script, so there's not much to be learned in terms of perl programming. However, I think it can be very helpful if you have an account at one of those cheap providers that allow CGI, but no shell, and you have trouble finding all the perl interpreters and their library paths. See a demo at http://www.web42.com/software/findperl/findperl.cgi (Note to Editor: If you deem it inappropriate for perlmonks.com, please feel free to delete).
#!/bin/sh # (c) Christian Renz <crenz@web42.com? # http://www.web42.com/software/findperl/ ### Configuration ### # Add a path here (e.g. /usr/bin/locate) if you run into problems LOCATE=locate WHICH=which UNAME=uname GREP=grep # Shell-Expression for perl interpreter filenames (for locate) PERLSHEX='perl' # Regex for perl interpreter filenames (for grep) PERLREGEX='/perl[0-9.]*$' # perl interpreter filenames (for which and manual search) PERLNAMES='perl perl5 perl4' # Fallback paths if locate and which fail FALLBACK='/usr/bin /usr/local/bin /bin /opt/bin' # Error formatting RED='<font color="#C00000"><b>' NORED='</font></b>' ### Main Program ### # echo nice HTML layout echo 'Content-Type: text/html <html> <head> <title>findPerl</title> </head> <p> </p> <blockquote> <h2>findPerl</h2> <hr size="1" width="100%"> ' # find out some system information SYSINFO=`$UNAME -a` if [ -z "$SYSINFO" ]; then echo "<p>$RED No system information found: $UNAME failed $NORED </ +p>" else echo "<p><b>System information (retrieved using <tt>$UNAME</tt>)</ +b>: $SYSINFO</p>" fi ### Searching for Perl ### echo "<p>Searching for perl interpreters installed on your system. This may take a few seconds.</p><p>" # Using locate... METHOD="<tt>$LOCATE</tt> / <tt>$GREP</tt>" PERLFOUND=`$LOCATE "$PERLSHEX" \| $GREP "$PERLREGEX"` # Using which... if [ -z "$PERLFOUND" ]; then echo "<p>$RED $METHOD failed. $NORED Using <tt>$WHICH</tt> instead +.<p>" METHOD="<tt>$WHICH</tt>" for i in $PERLNAMES; do # echo "Searching for '$i'...<br>" THISFOUND=`$WHICH $i` if [ "$THISFOUND" ]; then PERLFOUND="$PERLFOUND $THISFOUND" fi done fi # Using fallback paths... if [ -z "$PERLFOUND" ]; then echo "<p>$RED $METHOD failed. $NORED Using search in <tt>$FALLBACK +</tt> instead.</p>" METHOD="search in <tt>$FALLBACK</tt>" for i in $FALLBACK; do for j in $PERLNAMES; do PERLFOUND="$PERLFOUND $i/$j" done done fi ### Find real perl interpreters ### REALPERL='' # $PERLFOUND probably contains some paths, man pages etc. # We are only interested in those files which are standard # files and executable for i in $PERLFOUND; do if [ -f "$i" -a -x "$i" ]; then REALPERL="$REALPERL $i" fi done ### Output information about perl interpreters ### if [ -z "$REALPERL" ]; then echo "<p>$RED Sorry, I was unable to find any perl interpreter.$NORED Probably something went horribly wrong. Contact you +r server administrator for assistance.</p>" else echo "<p><b>perl interpreters found using $METHOD:</b><ul>" for i in $REALPERL; do if [ -f "$i" -a -x "$i" ]; then p=`$i -e 'print "$]<br>Library paths:<br> <font size=\"-1\"><tt>" . join("<br>", @INC) . "</font></tt>"'` echo "<li><b><tt>$i</tt></b><br>Version: $p</li>" fi done echo "</ul></p>" fi echo '<hr size="1" width="100%"> <font size="-1">findPerl 0.1 beta - Copyright © 2001 Christian R +enz - <a href="http://www.web42.com/software/findperl/">findPerl Homepage</a +></font> </blockquote>' ### eof ###

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