Makefile: Use template.

Makefile

-all: blink/blink.1 histogram/histogram.1 upsidedown/upsidedown.1 tracefile/tracefile.1 timestamp/timestamp.1 rand/rand.1 rrm/rrm.1 goodpasswd/goodpasswd.1
+CMD = blink histogram upsidedown tracefile timestamp rand rrm goodpasswd
 
-blink/blink.1: blink/blink
-	pod2man blink/blink > blink/blink.1
+all: blink/blink.1 goodpasswd/goodpasswd.1 histogram/histogram.1 rand/rand.1 rrm/rrm.1 timestamp/timestamp.1 tracefile/tracefile.1 upsidedown/upsidedown.1 wssh/wssh.1
 
-goodpasswd/goodpasswd.1: goodpasswd/goodpasswd
-	pod2man goodpasswd/goodpasswd > goodpasswd/goodpasswd.1
+%.1: %
+	pod2man $< > $@
 
-histogram/histogram.1: histogram/histogram
-	pod2man histogram/histogram > histogram/histogram.1
-
-rand/rand.1: rand/rand
-	pod2man rand/rand > rand/rand.1
-
-rrm/rrm.1: rrm/rrm
-	pod2man rrm/rrm > rrm/rrm.1
-
-timestamp/timestamp.1: timestamp/timestamp
-	pod2man timestamp/timestamp > timestamp/timestamp.1
-
-tracefile/tracefile.1: tracefile/tracefile.pod
-	pod2man tracefile/tracefile.pod > tracefile/tracefile.1
-
-upsidedown/upsidedown.1: upsidedown/upsidedown
-	pod2man upsidedown/upsidedown > upsidedown/upsidedown.1
-
-wssh/wssh.1: wssh/wssh
-	#pod2man wssh/wssh > wssh/wssh.1
 
 install:
 	mkdir -p /usr/local/bin

rrm/rclean

+#!/usr/bin/perl
+
+use Digest::MD5::File qw(dir_md5_hex file_md5_hex url_md5_hex);
+
+my $dir = shift || ".";
+
+chdir $dir;
+
+
+# Table of which files have a given size
+open(IN,"-|",'find "`pwd`" -type f -printf "%s\t%p\0"') || die;
+$/="\0";
+my %size;
+while(<IN>) {
+    chop; # Remove \0
+    my($s,$f) = split /\t/,$_;
+    push @{$size{$s}}, $f;
+}
+close IN;
+
+# Read md5sum of removed files of a given size
+my %rrm;
+my $rrmfile = find_rrm_file(".") || ".rrm";
+open(RRM,"<",$rrmfile) || die;
+while(<RRM>) {
+    my($size,$md5,$file) = split /\t/,$_;
+    $rrm{0+$size}{$md5}++;
+}
+close RRM;
+
+# Which existing files are the same size as some of the removed files?
+for my $size (keys %rrm) {
+    for my $file (@{$size{$size}}) {
+	if(-e $file) {
+	    my $md5 = Digest::MD5->new;	
+	    $md5->addpath($file);
+	    # Do they have the same md5sum?
+	    if($rrm{$size}{$md5->hexdigest}) {
+		# remove this
+		print "$file\n";
+	    }
+	}
+    }
+}
+
+sub find_rrm_file {
+    my $dir = shift;
+    if(-r "$dir/.rrm") {
+	return "$dir/.rrm";
+    }
+    if(join(" ",stat $dir) eq join(" ",stat "$dir/..")) {
+	# root
+	return undef;
+    } else {
+	return find_rrm_file("$dir/..");
+    } 
+}

rrm/rrm

+#!/usr/bin/perl
+
+=encoding utf8
+
+=head1 NAME
+
+rrm - record and remove file
+
+
+=head1 SYNOPSIS
+
+B<rrm> I<file>
+
+
+=head1 DESCRIPTION
+
+B<rrm> records a file's MD5sum before removing it. It makes it
+possible to automatically remove the file again should it ever
+reappear.
+
+This is useful for cleaning up photos where other partial backups of
+the photos are later added: Photos removed once can easily be
+identified and removed automatically if added by the backup.
+
+
+=head1 EXAMPLE
+
+B<rrm> IMG_2035.JPG
+
+Restore a backup containing I<IMG_2035.JPG>.
+
+B<rclean>
+
+B<rclean> will find B<IMG_2035.JPG> as it has the same size and MD5sum
+as an already removed file.
+
+
+=head1 FILES
+
+The file B<.rrm> contains the database of size, md5sum, and names of
+the files. It is created in current directory if it cannot be found in
+any of the (grand*)parent directories.
+
+
+=head1 SEE ALSO
+
+B<rclean>(1), B<rm>(1), B<md5sum>(1)
+
+
+=cut
+
+
+use Digest::MD5::File qw(dir_md5_hex file_md5_hex url_md5_hex);
+
+my %size;
+my %md5;
+for my $file (@ARGV) {
+    if(-s $file > 0) {
+	$size{$file} = -s $file;
+	my $md5 = Digest::MD5->new;
+	$md5->addpath($file);
+	$md5{$file} = $md5->hexdigest;
+    }    
+}
+
+$rrmfile = find_rrm_file(".") || ".rrm";
+
+open(RRM,">>",$rrmfile) || die("Cannot write to $rrmfile.");
+print RRM map { $size{$_}."\t".$md5{$_}."\t".$_."\0\n" } @ARGV;
+close RRM;
+unlink @ARGV;
+
+sub find_rrm_file {
+    my $dir = shift;
+    if(-r "$dir/.rrm") {
+	return "$dir/.rrm";
+    }
+    if(join(" ",stat $dir) eq join(" ",stat "../$dir")) {
+	# We have reached root dir (.. = .)
+	return undef;
+    } else {
+	return find_rrm_file("../$dir");
+    } 
+}

timestamp/timestamp.1

-.\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.16)
+.\" Automatically generated by Pod::Man 2.27 (Pod::Simple 3.28)
 .\"
 .\" Standard preamble:
 .\" ========================================================================
@@ -38,6 +38,8 @@
 .    ds PI \(*p
 .    ds L" ``
 .    ds R" ''
+.    ds C`
+.    ds C'
 'br\}
 .\"
 .\" Escape single quotes in literal strings from groff's Unicode transform.
@@ -48,17 +50,24 @@
 .\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
 .\" entries marked with X<> in POD.  Of course, you'll have to process the
 .\" output yourself in some meaningful fashion.
-.ie \nF \{\
-.    de IX
-.    tm Index:\\$1\t\\n%\t"\\$2"
+.\"
+.\" Avoid warning from groff about undefined register 'F'.
+.de IX
 ..
-.    nr % 0
-.    rr F
-.\}
-.el \{\
-.    de IX
+.nr rF 0
+.if \n(.g .if rF .nr rF 1
+.if (\n(rF:(\n(.g==0)) \{
+.    if \nF \{
+.        de IX
+.        tm Index:\\$1\t\\n%\t"\\$2"
 ..
+.        if !\nF==2 \{
+.            nr % 0
+.            nr F 2
+.        \}
+.    \}
 .\}
+.rr rF
 .\"
 .\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
 .\" Fear.  Run.  Save yourself.  No user-serviceable parts.
@@ -124,7 +133,7 @@
 .\" ========================================================================
 .\"
 .IX Title "TIMESTAMP 1"
-.TH TIMESTAMP 1 "2014-02-14" "perl v5.14.2" "User Contributed Perl Documentation"
+.TH TIMESTAMP 1 "2016-05-23" "perl v5.18.2" "User Contributed Perl Documentation"
 .\" For nroff, turn off justification.  Always turn off hyphenation; it makes
 .\" way too many mistakes in technical documents.
 .if n .ad l
@@ -145,10 +154,10 @@ and now.
 If \fB\-\-delta\fR is repeated: The time spent between each line.
 .IP "\fB\-\-rfc\fR" 9
 .IX Item "--rfc"
-Output time format in \s-1RFC822\s0 (E.g. Wed, 30 Jan 2013 13:57:58 \s-1GMT\s0).
+Output time format in \s-1RFC822 \s0(E.g. Wed, 30 Jan 2013 13:57:58 \s-1GMT\s0).
 .IP "\fB\-\-iso\fR" 9
 .IX Item "--iso"
-Output time format in \s-1ISO8601\s0 (E.g. 2013\-01\-30T13:57:58.322).
+Output time format in \s-1ISO8601 \s0(E.g. 2013\-01\-30T13:57:58.322).
 .IP "\fB\-\-iso\-time\fR" 9
 .IX Item "--iso-time"
 Output time format in ISO8601/time only (E.g. 13:57:58.322).
@@ -179,8 +188,8 @@ the Free Software Foundation; either version 3 of the License, or
 at your option any later version.
 .PP
 This program is distributed in the hope that it will be useful,
-but \s-1WITHOUT\s0 \s-1ANY\s0 \s-1WARRANTY\s0; without even the implied warranty of
-\&\s-1MERCHANTABILITY\s0 or \s-1FITNESS\s0 \s-1FOR\s0 A \s-1PARTICULAR\s0 \s-1PURPOSE\s0.  See the
+but \s-1WITHOUT ANY WARRANTY\s0; without even the implied warranty of
+\&\s-1MERCHANTABILITY\s0 or \s-1FITNESS FOR A PARTICULAR PURPOSE. \s0 See the
 \&\s-1GNU\s0 General Public License for more details.
 .PP
 You should have received a copy of the \s-1GNU\s0 General Public License

tracefile/tracefile

 #!/usr/bin/perl
 
+=head1 NAME
+
+tracefile - list files being accessed
+
+=head1 SYNOPSIS
+
+B<tracefile> [-aenu] I<command>
+
+B<tracefile> [-aenu] -p I<pid>
+
+=head1 DESCRIPTION
+
+B<tracefile> will print the files being accessed by the command.
+
+=head1 OPTIONS
+
+=over 9
+
+=item I<command>
+
+Command to run.
+
+
+=item B<-a>
+
+List all files.
+
+
+=item B<-e>
+
+List only existing files.
+
+
+=item B<-n>
+
+List only non-existing files.
+
+=item B<-p> I<pid>
+
+Trace process id.
+
+
+=item B<-u>
+
+List only files once.
+
+=back
+
+
+=head1 EXAMPLES
+
+=head2 EXAMPLE: Find the missing package
+
+Assume you have a program B<foo>. When it runs it fails with: I<foo:
+error: missing library>. It does not say with file is missing, but you
+have a hunch that you just need to install a package - you just do not
+know which one.
+
+    tracefile -n -u foo | apt-file -f search -
+
+Here B<ls> tries to find B</usr/include/shisa.h>. If it fails,
+B<apt-file> will search for which package it is in:
+
+    tracefile -n -u ls /usr/include/shisa.h | apt-file -f search -
+
+=head1 REPORTING BUGS
+
+Report bugs to <tange@gnu.org>.
+
+
+=head1 AUTHOR
+
+Copyright (C) 2012 Ole Tange, http://ole.tange.dk and Free
+Software Foundation, Inc.
+
+
+=head1 LICENSE
+
+Copyright (C) 2012 Free Software Foundation, Inc.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3 of the License, or
+at your option any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+=head2 Documentation license I
+
+Permission is granted to copy, distribute and/or modify this documentation
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
+Texts.  A copy of the license is included in the file fdl.txt.
+
+=head2 Documentation license II
+
+You are free:
+
+=over 9
+
+=item B<to Share>
+
+to copy, distribute and transmit the work
+
+=item B<to Remix>
+
+to adapt the work
+
+=back
+
+Under the following conditions:
+
+=over 9
+
+=item B<Attribution>
+
+You must attribute the work in the manner specified by the author or
+licensor (but not in any way that suggests that they endorse you or
+your use of the work).
+
+=item B<Share Alike>
+
+If you alter, transform, or build upon this work, you may distribute
+the resulting work only under the same, similar or a compatible
+license.
+
+=back
+
+With the understanding that:
+
+=over 9
+
+=item B<Waiver>
+
+Any of the above conditions can be waived if you get permission from
+the copyright holder.
+
+=item B<Public Domain>
+
+Where the work or any of its elements is in the public domain under
+applicable law, that status is in no way affected by the license.
+
+=item B<Other Rights>
+
+In no way are any of the following rights affected by the license:
+
+=over 2
+
+=item *
+
+Your fair dealing or fair use rights, or other applicable
+copyright exceptions and limitations;
+
+=item *
+
+The author's moral rights;
+
+=item *
+
+Rights other persons may have either in the work itself or in
+how the work is used, such as publicity or privacy rights.
+
+=back
+
+=back
+
+=over 9
+
+=item B<Notice>
+
+For any reuse or distribution, you must make clear to others the
+license terms of this work.
+
+=back
+
+A copy of the full license is included in the file as cc-by-sa.txt.
+
+=head1 DEPENDENCIES
+
+B<tracefile> uses Perl, and B<strace>.
+
+
+=head1 SEE ALSO
+
+B<strace>(1)
+
+=cut
+
 use Getopt::Long;
 
 $Global::progname = "tracefile";

tracefile/tracefile.pod

-#!/usr/bin/perl
-
-=head1 NAME
-
-tracefile - list files being accessed
-
-=head1 SYNOPSIS
-
-B<tracefile> [-aenu] I<command>
-
-B<tracefile> [-aenu] -p I<pid>
-
-=head1 DESCRIPTION
-
-B<tracefile> will print the files being accessed by the command.
-
-=head1 OPTIONS
-
-=over 9
-
-=item I<command>
-
-Command to run.
-
-
-=item B<-a>
-
-List all files.
-
-
-=item B<-e>
-
-List only existing files.
-
-
-=item B<-n>
-
-List only non-existing files.
-
-=item B<-p> I<pid>
-
-Trace process id.
-
-
-=item B<-u>
-
-List only files once.
-
-=back
-
-
-=head1 EXAMPLES
-
-=head2 EXAMPLE: Find the missing package
-
-Assume you have a program B<foo>. When it runs it fails with: I<foo:
-error: missing library>. It does not say with file is missing, but you
-have a hunch that you just need to install a package - you just do not
-know which one.
-
-    tracefile -n -u foo | apt-file -f search -
-
-Here B<ls> tries to find B</usr/include/shisa.h>. If it fails,
-B<apt-file> will search for which package it is in:
-
-    tracefile -n -u ls /usr/include/shisa.h | apt-file -f search -
-
-=head1 REPORTING BUGS
-
-Report bugs to <tange@gnu.org>.
-
-
-=head1 AUTHOR
-
-Copyright (C) 2012 Ole Tange, http://ole.tange.dk and Free
-Software Foundation, Inc.
-
-
-=head1 LICENSE
-
-Copyright (C) 2012 Free Software Foundation, Inc.
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 3 of the License, or
-at your option any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-=head2 Documentation license I
-
-Permission is granted to copy, distribute and/or modify this documentation
-under the terms of the GNU Free Documentation License, Version 1.3 or
-any later version published by the Free Software Foundation; with no
-Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
-Texts.  A copy of the license is included in the file fdl.txt.
-
-=head2 Documentation license II
-
-You are free:
-
-=over 9
-
-=item B<to Share>
-
-to copy, distribute and transmit the work
-
-=item B<to Remix>
-
-to adapt the work
-
-=back
-
-Under the following conditions:
-
-=over 9
-
-=item B<Attribution>
-
-You must attribute the work in the manner specified by the author or
-licensor (but not in any way that suggests that they endorse you or
-your use of the work).
-
-=item B<Share Alike>
-
-If you alter, transform, or build upon this work, you may distribute
-the resulting work only under the same, similar or a compatible
-license.
-
-=back
-
-With the understanding that:
-
-=over 9
-
-=item B<Waiver>
-
-Any of the above conditions can be waived if you get permission from
-the copyright holder.
-
-=item B<Public Domain>
-
-Where the work or any of its elements is in the public domain under
-applicable law, that status is in no way affected by the license.
-
-=item B<Other Rights>
-
-In no way are any of the following rights affected by the license:
-
-=over 2
-
-=item *
-
-Your fair dealing or fair use rights, or other applicable
-copyright exceptions and limitations;
-
-=item *
-
-The author's moral rights;
-
-=item *
-
-Rights other persons may have either in the work itself or in
-how the work is used, such as publicity or privacy rights.
-
-=back
-
-=back
-
-=over 9
-
-=item B<Notice>
-
-For any reuse or distribution, you must make clear to others the
-license terms of this work.
-
-=back
-
-A copy of the full license is included in the file as cc-by-sa.txt.