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|
#! /bin/perl
########################################################################
#
# /u/sonmi/bin/path_uniq
#
# this script makes components of a PATH like string unique cand prints
# it to stdout
#
# parameters
# ----------
# PATH
#
# options
# -------
# -d delimiter - default :
#
# usefull enhancements: in the usage part, try to guess what was meant as
# a path and echo it to stdout to not break for PATHs with blanks
#
########################################################################
sub usage {
print STDERR "usage $0 [-d <delimiter>] PATH\n";
print STDERR " this script makes components of the PATH unique, if you\n";
print STDERR " pass in a searchpath A:B:C:A:B:E it will print A:B:C:E to\n";
print STDERR " the stdout\n";
print STDERR " the parameters you gave were: ";
for ( $i = 0; $i <= $#ARGV; $i++ ) {
print STDERR " $ARGV[$i]\n";
}
exit ;
}
$i = 0;
$j = 0;
$delimiter = ":";
$searchpath = "";
@pathcomponents;
$found=0;
$newpath="";
if ( $ARGV[0] eq '-d' ) {
if ( $#ARGV != 2 ) {
usage;
}
$delimiter = $ARGV[1];
$searchpath = $ARGV[2];
} else {
if ( $#ARGV != 0 ) {
usage;
}
$searchpath = $ARGV[0];
}
@pathcomponents=split($delimiter, $searchpath);
for ( $i = 0; $i <= $#pathcomponents; $i++ ) {
$found=0;
for ( $j = 0; $j < $i; $j++ ) {
if ( $pathcomponents[$j] eq $pathcomponents[$i] ) {
#print "$i and $j match - $pathcomponents[$i] - $pathcomponents[$j]\n";
$found=1;
last;
}
}
if ( $found == 0 ) {
#print "$pathcomponents[$i]:";
if ($i == 0) {
$newpath = $pathcomponents[$i];
} else {
$newpath=join($delimiter, $newpath,$pathcomponents[$i]);
}
}
}
print "$newpath\n";
exit;
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