perl 2.0 (no announcement message available)perl-2.0

Some of the enhancements from Perl1 included:

    * New regexp routines derived from Henry Spencer's.
          o Support for /(foo|bar)/.
          o Support for /(foo)*/ and /(foo)+/.
          o \s for whitespace, \S for non-, \d for digit, \D nondigit 
    * Local variables in blocks, subroutines and evals.
    * Recursive subroutine calls are now supported.
    * Array values may now be interpolated into lists: unlink 'foo', 'bar', @trashcan, 'tmp';
    * File globbing.
    * Use of <> in array contexts returns the whole file or glob list.
    * New iterator for normal arrays, foreach, that allows both read and write.
    * Ability to open pipe to a forked off script for secure pipes in setuid scripts.
    * File inclusion via do 'foo.pl';
    * More file tests, including -t to see if, for instance, stdin is a terminal. File tests now behave in a more correct manner. You can do file tests on filehandles as well as filenames. The special filetests -T and -B test a file to see if it's text or binary.
    * An eof can now be used on each file of the <> input for such purposes as resetting the line numbers or appending to each file of an inplace edit.
    * Assignments can now function as lvalues, so you can say things like ($HOST = $host) =~ tr/a-z/A-Z/; ($obj = $src) =~ s/\.c$/.o/;
    * You can now do certain file operations with a variable which holds the name of a filehandle, e.g. open(++$incl,$includefilename); $foo = <$incl>;
    * Warnings are now available (with -w) on use of uninitialized variables and on identifiers that are mentioned only once, and on reference to various undefined things.
    * There is now a wait operator.
    * There is now a sort operator.
    * The manual is now not lying when it says that perl is generally faster than sed. I hope.

1 files changed, 87 insertions, 0 deletions

diff --git a/eg/scan/scanner b/eg/scan/scanner
new file mode 100644
index 0000000000..25e953d402
--- /dev/null
+++ b/eg/scan/scanner
@@ -0,0 +1,87 @@
+#!/usr/bin/perl
+
+# $Header: scanner,v 2.0 88/06/05 00:17:42 root Exp $
+
+# This runs all the scan_* routines on all the machines in /etc/ghosts.
+# We run this every morning at about 6 am:
+
+#	!/bin/sh
+#	cd /usr/adm/private
+#	decrypt scanner | perl >scan.out 2>&1
+#	mail admin <scan.out
+
+# Note that the scan_* files should be encrypted with the key "-inquire", and
+# scanner should be encrypted somehow so that people can't find that key.
+# I leave it up to you to figure out how to unencrypt it before executing.
+
+$ENV{'PATH'} = '/bin:/usr/bin:/usr/local/bin:/usr/ucb:.';
+
+$| = 1;		# command buffering on stdout
+
+print "Subject: bizarre happenings\n\n";
+
+(chdir '/usr/adm/private') || die "Can't cd.";
+
+if ($#ARGV >= 0) {
+    @scanlist = @ARGV;
+} else {
+    @scanlist = split(/[ \t\n]+/,`echo scan_*`);
+}
+
+scan: while ($scan = shift(@scanlist)) {
+    print "\n********** $scan **********\n";
+    $showhost++;
+
+    $systype = 'all';
+
+    open(ghosts, '/etc/ghosts') || die 'No /etc/ghosts file';
+
+    $one_of_these = ":$systype:";
+    if ($systype =~ s/\+/[+]/g) {
+	$one_of_these =~ s/\+/:/g;
+    }
+
+    line: while (<ghosts>) {
+	s/[ \t]*\n//;
+	if (!$_ || /^#/) {
+	    next line;
+	}
+	if (/^([a-zA-Z_0-9]+)=(.+)/) {
+	    $name = $1; $repl = $2;
+	    $repl =~ s/\+/:/g;
+	    $one_of_these =~ s/:$name:/:$repl:/;
+	    next line;
+	}
+	@gh = split;
+	$host = $gh[0];
+	if ($showhost) { $showhost = "$host:\t"; }
+	class: while ($class = pop(gh)) {
+	    if (index($one_of_these,":$class:") >=0) {
+		$iter = 0;
+		`exec crypt -inquire <$scan >.x 2>/dev/null`;
+		unless (open(scan,'.x')) {
+		    print "Can't run $scan.";
+		    next scan;
+		}
+		$cmd = <scan>;
+		unless ($cmd =~ s/#!(.*)\n/$1/) {
+		    $cmd = '/usr/bin/perl';
+		}
+		close(scan);
+		if (open(pipe,"exec rsh $host '$cmd' <.x|")) {
+		    sleep(5);
+		    unlink '.x';
+		    while (<pipe>) {
+			last if $iter++ > 1000;		# must be looping
+			next if /^[0-9.]+u [0-9.]+s/;
+			print $showhost,$_;
+		    }
+		    close(pipe);
+		} else {
+		    print "(Can't execute rsh.)\n";
+		}
+		last class;
+	    }
+	}
+    }
+}