Sweden-Number/tools/ipcl

#!/usr/bin/perl

#
# Copyright 1995. Michael Veksler.
#

$IPC_RMID=0;
$USER=$ENV{USER};

do open_pipe(IPCS,"ipcs");

#
# The following part is OS dependant, it works under linux only.
# To make it work under other OS 
# You should fill in @shm, @sem, @msq lists, with the relevent IPC
# keys.

#
# This code was written to be as much as possible generic, but...
# It works for Linux and ALPHA. I had no BSD machine to test it.
# (As I remember, AIX will work also).

while(<IPCS>) {
    split;

    # try to find out the IPC-ID, assume it is the first number.
    foreach (@_) {
	$_ ne int($_) && next;	# not a decimal number
	$num=$_;
	last;
    }
    if (/mem/i .. /^\s*$/ ) {
	index($_,$USER)>=0 || next;
	push(@shm,$num);
    }
    if (/sem/i .. /^\s*$/ ) {
	index($_,$USER)>=0 || next;
	push(@sem,$num);
    }
    if (/mes/i .. /^\s*$/ ) {
	index($_,$USER)>=0 || next;
	push(@msq,$num);
    }
}


#
# This is the end of OS dependant code.
#

@shm && print "shmid ", join(":",@shm),"\n";
@sem && print "semid ", join(":",@sem),"\n";
@msq && print "msqid ", join(":",@msq),"\n";
foreach (@shm) {
    shmctl($_, $IPC_RMID,0);
}
foreach (@sem) {
    semctl($_, 0, $IPC_RMID,0);
}
foreach (@msq) {
    msgctl($_, $IPC_RMID,0);
}

exit(0);





sub open_pipe {
    local($pid);
    local($handle,@params)=@_;
    pipe($handle,WRITE) || die "can't pipe";

    $pid=fork();

    die "can't fork" if ($pid<0);
    if ($pid>0) {
	# whe are in the parent
	close(WRITE);
	waitpid($pid,0) || print "$params[0] exits status=$? ",$? >> 8, "\n";
    } else {
	# we are in the son.
	open(STDOUT,">&WRITE");
	open(STDERR, ">&WRITE");
	close($handle);
	close(WRITE);
	exec(@params);
	exit(-1);
    }
    
}