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|
#! /usr/bin/perl
# -*- Mode: Perl -*-
# debian.postrm ---
# Author : Manoj Srivastava ( srivasta@pilgrim.umass.edu )
# Created On : Sat Apr 27 05:44:16 1996
# Created On Node : melkor.pilgrim.umass.edu
# Last Modified By : Manoj Srivastava
# Last Modified On : Wed Feb 18 15:43:38 1998
# Last Machine Used: tiamat.datasync.com
# Update Count : 18
# Status : Unknown, Use with caution!
# HISTORY :
# Description :
#
#
#
# $Id: include.postrm,v 1.5 1998/02/18 22:25:05 srivasta Exp $
#
$|=1;
# Predefined values:
my $package="=P";
my $version="=V";
my $LastVersion = '';
my $AnotherVersion = '';
# Ignore all invocations uxcept when called on to configure.
exit 0 unless ($ARGV[0] && $ARGV[0] =~ /remove/);
# most of our work is done in /usr/src.
chdir '/usr/src' or die "Could not chdir to /usr/src:$!";
# let us make sure that if the file .linux-versions exists, and that
# we can read and write to it.
if (-f '.linux-versions') {
my $found = 0;
my @Versions = ();
$LastVersion = '';
if (open(REGISTRY,"/usr/src/.linux-versions")) {
while (<REGISTRY>) {
chop;
$found = 1, next if /^\s*$package\s*$/o;
push @Versions, $_ ;
s/\s+//;
next if /^\s*$/;
next if /^\#/o;
$LastVersion = $_ ;
# See if there is a package with the same version
if (/\-$version$/o) { # Aha!
$AnotherVersion = $_;
}
}
close (REGISTRY);
}
else {
warn "Could not read /usr/src/.linux-versions: $!";
}
if ($found && open(REGISTRY,">/usr/src/.linux-versions")) {
foreach (@Versions) {
print REGISTRY "$_\n";
}
close(REGISTRY);
}
else {
warn "Could not write /usr/src/.linux-versions: $!" if $found;
}
}
# Test if we need to do anything at all. This test and exit make us
# idempotent.
if (-l 'linux') {
my $old_target = readlink('linux');
die "could not read link /usr/src/linux:$!" unless defined $old_target;
if ("$old_target" eq "$package") {
unlink 'linux' or do {
print STDERR <<"ERR";
Could not remove /usr/src/linux ($!)
Please remove manually.
ERR
;
exit 1;
} ;
unlink "linux-$version" or do {
print STDERR <<"ERR";
Could not remove /usr/src/linux-$version ($!)
Please remove manually.
ERR
;
exit 1;
} ;
if ($AnotherVersion) {
if (-d "$AnotherVersion") {
symlink $AnotherVersion, "linux-$version" or
die
"Error linking /usr/src/$AnotherVersion to /usr/src/linux-$version: $!";
}
}
}
else {
exit 0;
}
}
exit 0
__END__
|
