vanish

UNIX下perl实现代码

#!/usr/bin/perl

# $RCSfile: vanish,v $$Revision: 4.1 $$Date: 92/08/07 17:20:54 $

sub it {
    if ($olddir ne '.') {
	chop($pwd = `pwd`) if $pwd eq '';
	(chdir $olddir) || die "Directory $olddir is not accesible";
    }
    if (!-d .deleted) {
	print `mkdir .deleted; chmod 775 .deleted`;
	die "You can't remove files from $olddir" if $?;
    }
    $filelist =~ s/ $//;
    $filelist =~ s/#/\\#/g;
    if ($filelist !~ /^[ \t]*$/) {
	open(lastcmd,'>.deleted/.lastcmd');
	print lastcmd $filelist,"\n";
	close(lastcmd);
	print `/bin/mv $startfiles$filelist .deleted$force`;
    }
    if ($olddir ne '.') {
	(chdir $pwd) || die "Can't get back to original directory $pwd: $!\n";
    }
}

while ($ARGV[0] =~ /^-/) {
    $_ = shift;
    /^-f/ && ($force = ' >/dev/null 2>&1');
    /^-i/ && ($interactive = 1);
    if (/^-+$/) {
	$startfiles = '- ';
	last;
    }
}

chop($pwd = `pwd`);

while ($file = shift) {
    if ($file =~ s|^(.*)/||) {
	$dir = $1;
    }
    else {
	$dir = '.';
    }

    if ($interactive) {
	print "vanish: remove $dir/$file? ";
	next unless <stdin> =~ /^y/i;
    }

    if ($file eq '.deleted') {
	print stderr "To delete .deleted (the trashcan) use the 'empty' command.\n";
	next;
    }

    if ($dir ne $olddir) {
	do it() if $olddir;
	$olddir = $dir;
    }

    $filelist .= $file; $filelist .= ' ';
}

do it() if $olddir;