Merging upstream version 1.2~pre1.

Signed-off-by: Daniel Baumann <mail@daniel-baumann.ch>

20 files changed, 280 insertions, 243 deletions

diff --git a/ChangeLog b/ChangeLog
index 34149ef..571f232 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2014-01-20  Antonio Diaz Diaz  <antonio@gnu.org>
+
+	* Version 1.2-pre1 released.
+	* main.cc (close_and_set_permissions): Behave like 'cp -p'.
+	* dec_stdout.cc dec_stream.cc: Make 'slot_av' a vector to limit
+	  the number of packets produced by each worker individually.
+	* plzip.texinfo: Renamed to plzip.texi.
+
 2013-09-17  Antonio Diaz Diaz  <antonio@gnu.org>
 
 	* Version 1.1 released.
@@ -102,7 +110,7 @@
             until something better appears on the net.
 
 
-Copyright (C) 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz.
+Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Antonio Diaz Diaz.
 
 This file is a collection of facts, and thus it is not copyrightable,
 but just in case, you have unlimited permission to copy, distribute and
diff --git a/INSTALL b/INSTALL
index fc2e724..187dc73 100644
--- a/INSTALL
+++ b/INSTALL
@@ -60,7 +60,7 @@ After running 'configure', you can run 'make' and 'make install' as
 explained above.
 
 
-Copyright (C) 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz.
+Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Antonio Diaz Diaz.
 
 This file is free documentation: you have unlimited permission to copy,
 distribute and modify it.
diff --git a/Makefile.in b/Makefile.in
index f072079..d653a1c 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -1,8 +1,8 @@
 
 DISTNAME = $(pkgname)-$(pkgversion)
 INSTALL = install
-INSTALL_PROGRAM = $(INSTALL) -p -m 755
-INSTALL_DATA = $(INSTALL) -p -m 644
+INSTALL_PROGRAM = $(INSTALL) -m 755
+INSTALL_DATA = $(INSTALL) -m 644
 INSTALL_DIR = $(INSTALL) -d -m 755
 LIBS = -llz -lpthread
 SHELL = /bin/sh
@@ -43,8 +43,8 @@ doc : info man
 
 info : $(VPATH)/doc/$(pkgname).info
 
-$(VPATH)/doc/$(pkgname).info : $(VPATH)/doc/$(pkgname).texinfo
-	cd $(VPATH)/doc && makeinfo $(pkgname).texinfo
+$(VPATH)/doc/$(pkgname).info : $(VPATH)/doc/$(pkgname).texi
+	cd $(VPATH)/doc && makeinfo $(pkgname).texi
 
 man : $(VPATH)/doc/$(progname).1
 
@@ -93,7 +93,7 @@ uninstall-man :
 
 dist : doc
 	ln -sf $(VPATH) $(DISTNAME)
-	tar -cvf $(DISTNAME).tar \
+	tar -Hustar --owner=root --group=root -cvf $(DISTNAME).tar \
 	  $(DISTNAME)/AUTHORS \
 	  $(DISTNAME)/COPYING \
 	  $(DISTNAME)/ChangeLog \
@@ -104,7 +104,7 @@ dist : doc
 	  $(DISTNAME)/configure \
 	  $(DISTNAME)/doc/$(progname).1 \
 	  $(DISTNAME)/doc/$(pkgname).info \
-	  $(DISTNAME)/doc/$(pkgname).texinfo \
+	  $(DISTNAME)/doc/$(pkgname).texi \
 	  $(DISTNAME)/testsuite/check.sh \
 	  $(DISTNAME)/testsuite/test.txt \
 	  $(DISTNAME)/testsuite/test.txt.lz \
diff --git a/NEWS b/NEWS
index e5c7c14..6922675 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,11 @@
-Changes in version 1.1:
+Changes in version 1.2:
 
-Plzip now shows the progress of compression at verbosity level 2 (-vv).
+Copying of file dates, permissions, and ownership now behaves like "cp -p".
+(If the user ID or the group ID can't be duplicated, the file permission
+bits S_ISUID and S_ISGID are cleared).
 
-Signals "SIGUSR1" and "SIGUSR2" are no more used to signal a fatal error.
+Individual limits have been set on the number of packets produced by
+each decompresor worker thread to limit the amount of memory used in all
+cases.
+
+"plzip.texinfo" has been renamed to "plzip.texi".
diff --git a/README b/README
index 7a02327..e89b25f 100644
--- a/README
+++ b/README
@@ -6,12 +6,9 @@ the one of lzip, bzip2 or gzip.
 
 Plzip can compress/decompress large files on multiprocessor machines
 much faster than lzip, at the cost of a slightly reduced compression
-ratio. On files large enough (several GB), plzip can use hundreds of
-processors. On files of only a few MB it is better to use lzip.
-
-Plzip uses the same well-defined exit status values used by lzip and
-bzip2, which makes it safer when used in pipes or scripts than
-compressors returning ambiguous warning values, like gzip.
+ratio. Note that the number of usable threads is limited by file size,
+so on files larger than a few GB plzip can use hundreds of processors,
+but on files of only a few MB plzip is no faster than lzip.
 
 Plzip uses the lzip file format; the files produced by plzip are fully
 compatible with lzip-1.4 or newer, and can be rescued with lziprecover.
@@ -35,12 +32,27 @@ lziprecover program. Lziprecover makes lzip files resistant to bit-flip
 recovery capabilities, including error-checked merging of damaged copies
 of a file.
 
-Plzip replaces every file given in the command line with a compressed
-version of itself, with the name "original_name.lz". Each compressed
-file has the same modification date, permissions, and, when possible,
-ownership as the corresponding original, so that these properties can be
-correctly restored at decompression time. Plzip is able to read from some
-types of non regular files if the "--stdout" option is specified.
+Plzip uses the same well-defined exit status values used by lzip and
+bzip2, which makes it safer than compressors returning ambiguous warning
+values (like gzip) when it is used as a back end for tar or zutils.
+
+When compressing, plzip replaces every file given in the command line
+with a compressed version of itself, with the name "original_name.lz".
+When decompressing, plzip attempts to guess the name for the decompressed
+file from that of the compressed file as follows:
+
+filename.lz    becomes   filename
+filename.tlz   becomes   filename.tar
+anyothername   becomes   anyothername.out
+
+(De)compressing a file is much like copying or moving it; therefore plzip
+preserves the access and modification dates, permissions, and, when
+possible, ownership of the file just as "cp -p" does. (If the user ID or
+the group ID can't be duplicated, the file permission bits S_ISUID and
+S_ISGID are cleared).
+
+Plzip is able to read from some types of non regular files if the
+"--stdout" option is specified.
 
 If no file names are specified, plzip compresses (or decompresses) from
 standard input to standard output. In this case, plzip will decline to
@@ -53,7 +65,7 @@ corresponding uncompressed files. Integrity testing of concatenated
 compressed files is also supported.
 
 
-Copyright (C) 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz.
+Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Antonio Diaz Diaz.
 
 This file is free documentation: you have unlimited permission to copy,
 distribute and modify it.
diff --git a/arg_parser.cc b/arg_parser.cc
index 5cb98a9..7d98ffe 100644
--- a/arg_parser.cc
+++ b/arg_parser.cc
@@ -1,5 +1,5 @@
 /*  Arg_parser - POSIX/GNU command line argument parser. (C++ version)
-    Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
+    Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014
     Antonio Diaz Diaz.
 
     This library is free software: you can redistribute it and/or modify
diff --git a/arg_parser.h b/arg_parser.h
index 5248cb1..8d0d5b3 100644
--- a/arg_parser.h
+++ b/arg_parser.h
@@ -1,5 +1,5 @@
 /*  Arg_parser - POSIX/GNU command line argument parser. (C++ version)
-    Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
+    Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014
     Antonio Diaz Diaz.
 
     This library is free software: you can redistribute it and/or modify
diff --git a/compress.cc b/compress.cc
index 050fdc1..942f1d3 100644
--- a/compress.cc
+++ b/compress.cc
@@ -1,6 +1,6 @@
 /*  Plzip - Parallel compressor compatible with lzip
     Copyright (C) 2009 Laszlo Ersek.
-    Copyright (C) 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz.
+    Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Antonio Diaz Diaz.
 
     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
@@ -248,7 +248,7 @@ public:
   // collect a packet from a worker
   void collect_packet( const Packet * const opacket )
     {
-    const int i = opacket->id%num_slots;
+    const int i = opacket->id % num_slots;
     xlock( &omutex );
     // id collision shouldn't happen
     if( circular_buffer[i] != 0 )
diff --git a/configure b/configure
index cb38aa1..8dbf2d3 100755
--- a/configure
+++ b/configure
@@ -1,14 +1,14 @@
 #! /bin/sh
 # configure script for Plzip - Parallel compressor compatible with lzip
-# Copyright (C) 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz.
+# Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Antonio Diaz Diaz.
 #
 # This configure script is free software: you have unlimited permission
 # to copy, distribute and modify it.
 
 pkgname=plzip
-pkgversion=1.1
+pkgversion=1.2-pre1
 progname=plzip
-srctrigger=doc/${pkgname}.texinfo
+srctrigger=doc/${pkgname}.texi
 
 # clear some things potentially inherited from environment.
 LC_ALL=C
@@ -165,7 +165,7 @@ echo "LDFLAGS = ${LDFLAGS}"
 rm -f Makefile
 cat > Makefile << EOF
 # Makefile for Plzip - Parallel compressor compatible with lzip
-# Copyright (C) 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz.
+# Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Antonio Diaz Diaz.
 # This file was generated automatically by configure. Do not edit.
 #
 # This Makefile is free software: you have unlimited permission
diff --git a/dec_stdout.cc b/dec_stdout.cc
index fda4e9e..6c750c6 100644
--- a/dec_stdout.cc
+++ b/dec_stdout.cc
@@ -1,6 +1,6 @@
 /*  Plzip - Parallel compressor compatible with lzip
     Copyright (C) 2009 Laszlo Ersek.
-    Copyright (C) 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz.
+    Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Antonio Diaz Diaz.
 
     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
@@ -59,11 +59,10 @@ private:
   std::vector< std::queue< Packet * > > opacket_queues;
   int num_working;			// number of workers still running
   const int num_workers;		// number of workers
-  const int num_slots;			// max output packets in circulation
-  int num_free;				// remaining free output slots
+  const unsigned out_slots;		// max output packets per queue
   pthread_mutex_t omutex;
   pthread_cond_t oav_or_exit;	// output packet available or all workers exited
-  pthread_cond_t slot_av;		// free output slot available
+  std::vector< pthread_cond_t > slot_av;	// output slot available
 
   Packet_courier( const Packet_courier & );	// declared as private
   void operator=( const Packet_courier & );	// declared as private
@@ -73,11 +72,17 @@ public:
     : ocheck_counter( 0 ), owait_counter( 0 ),
       deliver_worker_id( 0 ),
       opacket_queues( workers ), num_working( workers ),
-      num_workers( workers ), num_slots( 8 * slots ), num_free( num_slots )
-    { xinit( &omutex ); xinit( &oav_or_exit ); xinit( &slot_av ); }
+      num_workers( workers ), out_slots( slots ), slot_av( workers )
+    {
+    xinit( &omutex ); xinit( &oav_or_exit );
+    for( unsigned i = 0; i < slot_av.size(); ++i ) xinit( &slot_av[i] );
+    }
 
   ~Packet_courier()
-    { xdestroy( &slot_av ); xdestroy( &oav_or_exit ); xdestroy( &omutex ); }
+    {
+    for( unsigned i = 0; i < slot_av.size(); ++i ) xdestroy( &slot_av[i] );
+    xdestroy( &oav_or_exit ); xdestroy( &omutex );
+    }
 
   void worker_finished()
     {
@@ -93,9 +98,8 @@ public:
     xlock( &omutex );
     if( opacket->data )
       {
-      while( worker_id != deliver_worker_id && num_free <= 0 )
-        xwait( &slot_av, &omutex );
-      --num_free;
+      while( opacket_queues[worker_id].size() >= out_slots )
+        xwait( &slot_av[worker_id], &omutex );
       }
     opacket_queues[worker_id].push( opacket );
     if( worker_id == deliver_worker_id ) xsignal( &oav_or_exit );
@@ -119,13 +123,10 @@ public:
       if( opacket_queues[deliver_worker_id].empty() ) break;
       opacket = opacket_queues[deliver_worker_id].front();
       opacket_queues[deliver_worker_id].pop();
-      if( opacket->data )
-        {
-        if( ++num_free == 1 ) xsignal( &slot_av );
-        break;
-        }
+      if( opacket_queues[deliver_worker_id].size() + 1 == out_slots )
+        xsignal( &slot_av[deliver_worker_id] );
+      if( opacket->data ) break;
       if( ++deliver_worker_id >= num_workers ) deliver_worker_id = 0;
-      xbroadcast( &slot_av );		// restart deliver_worker_id thread
       delete opacket; opacket = 0;
       }
     xunlock( &omutex );
@@ -134,7 +135,7 @@ public:
 
   bool finished()		// all packets delivered to muxer
     {
-    if( num_free != num_slots || num_working != 0 ) return false;
+    if( num_working != 0 ) return false;
     for( int i = 0; i < num_workers; ++i )
       if( !opacket_queues[i].empty() ) return false;
     return true;
@@ -271,11 +272,8 @@ int dec_stdout( const int num_workers, const int infd, const int outfd,
                 const Pretty_print & pp, const int debug_level,
                 const File_index & file_index )
   {
-  const int slots_per_worker = 2;
-  const int num_slots = ( ( INT_MAX / num_workers >= slots_per_worker ) ?
-                          num_workers * slots_per_worker : INT_MAX );
-
-  Packet_courier courier( num_workers, num_slots );
+  const int out_slots = 32;
+  Packet_courier courier( num_workers, out_slots );
 
   Worker_arg * worker_args = new( std::nothrow ) Worker_arg[num_workers];
   pthread_t * worker_threads = new( std::nothrow ) pthread_t[num_workers];
diff --git a/dec_stream.cc b/dec_stream.cc
index 64dcce3..2897002 100644
--- a/dec_stream.cc
+++ b/dec_stream.cc
@@ -1,6 +1,6 @@
 /*  Plzip - Parallel compressor compatible with lzip
     Copyright (C) 2009 Laszlo Ersek.
-    Copyright (C) 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz.
+    Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Antonio Diaz Diaz.
 
     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
@@ -65,35 +65,36 @@ private:
   std::vector< std::queue< Packet * > > opacket_queues;
   int num_working;			// number of workers still running
   const int num_workers;		// number of workers
-  const int num_slots;			// max output packets in circulation
-  int num_free;				// remaining free output slots
+  const unsigned out_slots;		// max output packets per queue
   pthread_mutex_t imutex;
   pthread_cond_t iav_or_eof;	// input packet available or splitter done
   pthread_mutex_t omutex;
   pthread_cond_t oav_or_exit;	// output packet available or all workers exited
-  pthread_cond_t slot_av;		// free output slot available
-  bool eof;				// splitter done
+  std::vector< pthread_cond_t > slot_av;	// output slot available
+  bool eof;					// splitter done
 
   Packet_courier( const Packet_courier & );	// declared as private
   void operator=( const Packet_courier & );	// declared as private
 
 public:
-  Packet_courier( const int workers, const int slots )
+  Packet_courier( const int workers, const int in_slots, const int oslots )
     : icheck_counter( 0 ), iwait_counter( 0 ),
       ocheck_counter( 0 ), owait_counter( 0 ),
       receive_worker_id( 0 ), deliver_worker_id( 0 ),
-      slot_tally( slots ), ipacket_queues( workers ),
+      slot_tally( in_slots ), ipacket_queues( workers ),
       opacket_queues( workers ), num_working( workers ),
-      num_workers( workers ), num_slots( 8 * slots ), num_free( num_slots ),
+      num_workers( workers ), out_slots( oslots ), slot_av( workers ),
       eof( false )
     {
     xinit( &imutex ); xinit( &iav_or_eof );
-    xinit( &omutex ); xinit( &oav_or_exit ); xinit( &slot_av );
+    xinit( &omutex ); xinit( &oav_or_exit );
+    for( unsigned i = 0; i < slot_av.size(); ++i ) xinit( &slot_av[i] );
     }
 
   ~Packet_courier()
     {
-    xdestroy( &slot_av ); xdestroy( &oav_or_exit ); xdestroy( &omutex );
+    for( unsigned i = 0; i < slot_av.size(); ++i ) xdestroy( &slot_av[i] );
+    xdestroy( &oav_or_exit ); xdestroy( &omutex );
     xdestroy( &iav_or_eof ); xdestroy( &imutex );
     }
 
@@ -149,9 +150,8 @@ public:
     xlock( &omutex );
     if( opacket->data )
       {
-      while( worker_id != deliver_worker_id && num_free <= 0 )
-        xwait( &slot_av, &omutex );
-      --num_free;
+      while( opacket_queues[worker_id].size() >= out_slots )
+        xwait( &slot_av[worker_id], &omutex );
       }
     opacket_queues[worker_id].push( opacket );
     if( worker_id == deliver_worker_id ) xsignal( &oav_or_exit );
@@ -175,13 +175,10 @@ public:
       if( opacket_queues[deliver_worker_id].empty() ) break;
       opacket = opacket_queues[deliver_worker_id].front();
       opacket_queues[deliver_worker_id].pop();
-      if( opacket->data )
-        {
-        if( ++num_free == 1 ) xsignal( &slot_av );
-        break;
-        }
+      if( opacket_queues[deliver_worker_id].size() + 1 == out_slots )
+        xsignal( &slot_av[deliver_worker_id] );
+      if( opacket->data ) break;
       if( ++deliver_worker_id >= num_workers ) deliver_worker_id = 0;
-      xbroadcast( &slot_av );		// restart deliver_worker_id thread
       delete opacket; opacket = 0;
       }
     xunlock( &omutex );
@@ -198,8 +195,7 @@ public:
 
   bool finished()		// all packets delivered to muxer
     {
-    if( !slot_tally.all_free() ||
-        num_free != num_slots || !eof || num_working != 0 ) return false;
+    if( !slot_tally.all_free() || !eof || num_working != 0 ) return false;
     for( int i = 0; i < num_workers; ++i )
       if( !ipacket_queues[i].empty() ) return false;
     for( int i = 0; i < num_workers; ++i )
@@ -408,7 +404,7 @@ extern "C" void * dworker_s( void * arg )
           if( trailing_garbage_found ||
               LZ_decompress_finished( decoder ) == 1 )
             {
-            LZ_decompress_reset( decoder );	// prepare for new ipacket
+            LZ_decompress_reset( decoder );	// prepare for new member
             Packet * opacket = new Packet;	// end of member token
             opacket->data = 0;
             opacket->size = 0;
@@ -464,12 +460,13 @@ int dec_stream( const int num_workers, const int infd, const int outfd,
                 const Pretty_print & pp, const int debug_level,
                 const bool testing )
   {
-  const int slots_per_worker = 2;
-  const int num_slots = ( ( INT_MAX / num_workers >= slots_per_worker ) ?
-                          num_workers * slots_per_worker : INT_MAX );
+  const int in_slots_per_worker = 2;
+  const int out_slots = 32;
+  const int in_slots = ( INT_MAX / num_workers >= in_slots_per_worker ) ?
+                       num_workers * in_slots_per_worker : INT_MAX;
   in_size = 0;
   out_size = 0;
-  Packet_courier courier( num_workers, num_slots );
+  Packet_courier courier( num_workers, in_slots, out_slots );
 
   Splitter_arg splitter_arg;
   splitter_arg.courier = &courier;
diff --git a/decompress.cc b/decompress.cc
index d008d1c..b174bcd 100644
--- a/decompress.cc
+++ b/decompress.cc
@@ -1,6 +1,6 @@
 /*  Plzip - Parallel compressor compatible with lzip
     Copyright (C) 2009 Laszlo Ersek.
-    Copyright (C) 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz.
+    Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Antonio Diaz Diaz.
 
     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
diff --git a/doc/plzip.1 b/doc/plzip.1
index 291a67f..11bd052 100644
--- a/doc/plzip.1
+++ b/doc/plzip.1
@@ -1,5 +1,5 @@
 .\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.37.1.
-.TH PLZIP "1" "September 2013" "Plzip 1.1" "User Commands"
+.TH PLZIP "1" "January 2014" "Plzip 1.2-pre1" "User Commands"
 .SH NAME
 Plzip \- reduces the size of files
 .SH SYNOPSIS
@@ -84,8 +84,8 @@ Plzip home page: http://www.nongnu.org/lzip/plzip.html
 .SH COPYRIGHT
 Copyright \(co 2009 Laszlo Ersek.
 .br
-Copyright \(co 2013 Antonio Diaz Diaz.
-Using Lzlib 1.5
+Copyright \(co 2014 Antonio Diaz Diaz.
+Using Lzlib 1.6\-pre1
 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
 .br
 This is free software: you are free to change and redistribute it.
diff --git a/doc/plzip.info b/doc/plzip.info
index 7461e06..717471c 100644
--- a/doc/plzip.info
+++ b/doc/plzip.info
@@ -1,5 +1,4 @@
-This is plzip.info, produced by makeinfo version 4.13 from
-plzip.texinfo.
+This is plzip.info, produced by makeinfo version 4.13+ from plzip.texi.
 
 INFO-DIR-SECTION Data Compression
 START-INFO-DIR-ENTRY
@@ -12,7 +11,7 @@ File: plzip.info,  Node: Top,  Next: Introduction,  Up: (dir)
 Plzip Manual
 ************
 
-This manual is for Plzip (version 1.1, 17 September 2013).
+This manual is for Plzip (version 1.2-pre1, 20 January 2014).
 
 * Menu:
 
@@ -24,7 +23,7 @@ This manual is for Plzip (version 1.1, 17 September 2013).
 * Concept index::          Index of concepts
 
 
-   Copyright (C) 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz.
+   Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Antonio Diaz Diaz.
 
    This manual is free documentation: you have unlimited permission to
 copy, distribute and modify it.
@@ -41,12 +40,9 @@ the one of lzip, bzip2 or gzip.
 
    Plzip can compress/decompress large files on multiprocessor machines
 much faster than lzip, at the cost of a slightly reduced compression
-ratio. On files large enough (several GB), plzip can use hundreds of
-processors. On files of only a few MB it is better to use lzip.
-
-   Plzip uses the same well-defined exit status values used by lzip and
-bzip2, which makes it safer when used in pipes or scripts than
-compressors returning ambiguous warning values, like gzip.
+ratio. Note that the number of usable threads is limited by file size,
+so on files larger than a few GB plzip can use hundreds of processors,
+but on files of only a few MB plzip is no faster than lzip.
 
    Plzip uses the lzip file format; the files produced by plzip are
 fully compatible with lzip-1.4 or newer, and can be rescued with
@@ -71,12 +67,27 @@ lziprecover program. Lziprecover makes lzip files resistant to bit-flip
 recovery capabilities, including error-checked merging of damaged copies
 of a file.
 
-   Plzip replaces every file given in the command line with a compressed
-version of itself, with the name "original_name.lz". Each compressed
-file has the same modification date, permissions, and, when possible,
-ownership as the corresponding original, so that these properties can be
-correctly restored at decompression time. Plzip is able to read from
-some types of non regular files if the `--stdout' option is specified.
+   Plzip uses the same well-defined exit status values used by lzip and
+bzip2, which makes it safer than compressors returning ambiguous warning
+values (like gzip) when it is used as a back end for tar or zutils.
+
+   When compressing, plzip replaces every file given in the command line
+with a compressed version of itself, with the name "original_name.lz".
+When decompressing, plzip attempts to guess the name for the
+decompressed file from that of the compressed file as follows:
+
+filename.lz    becomes   filename
+filename.tlz   becomes   filename.tar
+anyothername   becomes   anyothername.out
+
+   (De)compressing a file is much like copying or moving it; therefore
+plzip preserves the access and modification dates, permissions, and,
+when possible, ownership of the file just as "cp -p" does. (If the user
+ID or the group ID can't be duplicated, the file permission bits
+S_ISUID and S_ISGID are cleared).
+
+   Plzip is able to read from some types of non regular files if the
+'--stdout' option is specified.
 
    If no file names are specified, plzip compresses (or decompresses)
 from standard input to standard output. In this case, plzip will
@@ -88,19 +99,12 @@ two or more compressed files. The result is the concatenation of the
 corresponding uncompressed files. Integrity testing of concatenated
 compressed files is also supported.
 
-   When decompressing, plzip attempts to guess the name for the
-decompressed file from that of the compressed file as follows:
-
-filename.lz    becomes   filename
-filename.tlz   becomes   filename.tar
-anyothername   becomes   anyothername.out
-
    WARNING! Even if plzip is bug-free, other causes may result in a
 corrupt compressed file (bugs in the system libraries, memory errors,
 etc).  Therefore, if the data you are going to compress is important,
-give the `--keep' option to plzip and do not remove the original file
+give the '--keep' option to plzip and do not remove the original file
 until you verify the compressed file with a command like
-`plzip -cd file.lz | cmp file -'.
+'plzip -cd file.lz | cmp file -'.
 
 
 File: plzip.info,  Node: Program design,  Next: Invoking plzip,  Prev: Introduction,  Up: Top
@@ -137,73 +141,78 @@ The format for running plzip is:
 
    Plzip supports the following options:
 
-`-h'
-`--help'
+'-h'
+'--help'
      Print an informative help message describing the options and exit.
 
-`-V'
-`--version'
+'-V'
+'--version'
      Print the version number of plzip on the standard output and exit.
 
-`-B BYTES'
-`--data-size=BYTES'
+'-B BYTES'
+'--data-size=BYTES'
      Set the input data block size in bytes. The input file will be
      divided in chunks of this size before compression is performed.
      Valid values range from 8 KiB to 1 GiB. Default value is two times
      the dictionary size. Plzip will reduce the dictionary size if it
      is larger than the chosen data size.
 
-`-c'
-`--stdout'
+'-c'
+'--stdout'
      Compress or decompress to standard output. Needed when reading
      from a named pipe (fifo) or from a device.
 
-`-d'
-`--decompress'
+'-d'
+'--decompress'
      Decompress.
 
-`-f'
-`--force'
+'-f'
+'--force'
      Force overwrite of output files.
 
-`-F'
-`--recompress'
-     Force recompression of files whose name already has the `.lz' or
-     `.tlz' suffix.
+'-F'
+'--recompress'
+     Force recompression of files whose name already has the '.lz' or
+     '.tlz' suffix.
 
-`-k'
-`--keep'
+'-k'
+'--keep'
      Keep (don't delete) input files during compression or
      decompression.
 
-`-m BYTES'
-`--match-length=BYTES'
+'-m BYTES'
+'--match-length=BYTES'
      Set the match length limit in bytes. After a match this long is
      found, the search is finished. Valid values range from 5 to 273.
      Larger values usually give better compression ratios but longer
      compression times.
 
-`-n N'
-`--threads=N'
+'-n N'
+'--threads=N'
      Set the number of worker threads. Valid values range from 1 to "as
      many as your system can support". If this option is not used,
      plzip tries to detect the number of processors in the system and
-     use it as default value. `plzip --help' shows the system's default
+     use it as default value. 'plzip --help' shows the system's default
      value.
 
-`-o FILE'
-`--output=FILE'
-     When reading from standard input and `--stdout' has not been
-     specified, use `FILE' as the virtual name of the uncompressed
-     file. This produces a file named `FILE' when decompressing, and a
-     file named `FILE.lz' when compressing.
+     Note that the number of usable threads is limited to
+     ceil( file_size / data_size ) during compression (*note
+     --data-size::), and to the number of members in the input during
+     decompression.
+
+'-o FILE'
+'--output=FILE'
+     When reading from standard input and '--stdout' has not been
+     specified, use 'FILE' as the virtual name of the uncompressed
+     file. This produces a file named 'FILE' when decompressing, and a
+     file named 'FILE.lz' when compressing.
 
-`-q'
-`--quiet'
+'-q'
+'--quiet'
      Quiet operation. Suppress all messages.
 
-`-s BYTES'
-`--dictionary-size=BYTES'
+'-s BYTES'
+'--dictionary-size=BYTES'
      Set the dictionary size limit in bytes. Valid values range from 4
      KiB to 512 MiB. Plzip will use the smallest possible dictionary
      size for each member without exceeding this limit. Note that
@@ -216,33 +225,33 @@ The format for running plzip is:
      requirement is affected at compression time by the choice of
      dictionary size limit.
 
-`-t'
-`--test'
+'-t'
+'--test'
      Check integrity of the specified file(s), but don't decompress
      them.  This really performs a trial decompression and throws away
-     the result.  Use it together with `-v' to see information about
+     the result.  Use it together with '-v' to see information about
      the file.
 
-`-v'
-`--verbose'
+'-v'
+'--verbose'
      Verbose mode.
      When compressing, show the compression ratio for each file
-     processed. A second -v shows the progress of compression.
+     processed. A second '-v' shows the progress of compression.
      When decompressing or testing, further -v's (up to 4) increase the
      verbosity level, showing status, compression ratio, decompressed
      size, and compressed size.
 
-`-1 .. -9'
+'-1 .. -9'
      Set the compression parameters (dictionary size and match length
-     limit) as shown in the table below. Note that `-9' can be much
-     slower than `-1'. These options have no effect when decompressing.
+     limit) as shown in the table below. Note that '-9' can be much
+     slower than '-1'. These options have no effect when decompressing.
 
      The bidimensional parameter space of LZMA can't be mapped to a
      linear scale optimal for all files. If your files are large, very
-     repetitive, etc, you may need to use the `--match-length' and
-     `--dictionary-size' options directly to achieve optimal
-     performance. For example, `-9m64' usually compresses executables
-     more (and faster) than `-9'.
+     repetitive, etc, you may need to use the '--match-length' and
+     '--dictionary-size' options directly to achieve optimal
+     performance. For example, '-9m64' usually compresses executables
+     more (and faster) than '-9'.
 
      Level   Dictionary size   Match length limit
      -1      1 MiB             5 bytes
@@ -255,13 +264,13 @@ The format for running plzip is:
      -8      24 MiB            132 bytes
      -9      32 MiB            273 bytes
 
-`--fast'
-`--best'
+'--fast'
+'--best'
      Aliases for GNU gzip compatibility.
 
 
    Numbers given as arguments to options may be followed by a multiplier
-and an optional `B' for "byte".
+and an optional 'B' for "byte".
 
    Table of SI and binary prefixes (unit multipliers):
 
@@ -316,15 +325,15 @@ additional information before, between, or after them.
 
    All multibyte values are stored in little endian order.
 
-`ID string'
+'ID string'
      A four byte string, identifying the lzip format, with the value
      "LZIP" (0x4C, 0x5A, 0x49, 0x50).
 
-`VN (version number, 1 byte)'
+'VN (version number, 1 byte)'
      Just in case something needs to be modified in the future. 1 for
      now.
 
-`DS (coded dictionary size, 1 byte)'
+'DS (coded dictionary size, 1 byte)'
      Lzip divides the distance between any two powers of 2 into 8
      equally spaced intervals, named "wedges". The dictionary size is
      calculated by taking a power of 2 (the base size) and substracting
@@ -336,18 +345,18 @@ additional information before, between, or after them.
      Example: 0xD3 = 2^19 - 6 * 2^15 = 512 KiB - 6 * 32 KiB = 320 KiB
      Valid values for dictionary size range from 4 KiB to 512 MiB.
 
-`Lzma stream'
+'Lzma stream'
      The lzma stream, finished by an end of stream marker. Uses default
      values for encoder properties. See the lzip manual for a full
      description.
 
-`CRC32 (4 bytes)'
+'CRC32 (4 bytes)'
      CRC of the uncompressed original data.
 
-`Data size (8 bytes)'
+'Data size (8 bytes)'
      Size of the uncompressed original data.
 
-`Member size (8 bytes)'
+'Member size (8 bytes)'
      Total size of the member, including header and trailer. This field
      acts as a distributed index, allows the verification of stream
      integrity, and facilitates safe recovery of undamaged members from
@@ -367,7 +376,7 @@ for all eternity, if not longer.
 
    If you find a bug in plzip, please send electronic mail to
 <lzip-bug@nongnu.org>. Include the version number, which you can find
-by running `plzip --version'.
+by running 'plzip --version'.
 
 
 File: plzip.info,  Node: Concept index,  Prev: Problems,  Up: Top
@@ -391,13 +400,14 @@ Concept index
 
 
 Tag Table:
-Node: Top223
-Node: Introduction871
-Node: Program design4426
-Node: Invoking plzip5480
-Node: File format10864
-Node: Problems13369
-Node: Concept index13898
+Node: Top221
+Node: Introduction878
+Node: Program design4650
+Node: Invoking plzip5704
+Ref: --data-size6149
+Node: File format11300
+Node: Problems13805
+Node: Concept index14334
 
 End Tag Table
 
diff --git a/doc/plzip.texinfo b/doc/plzip.texi
index 0370677..413a9e3 100644
--- a/doc/plzip.texinfo
+++ b/doc/plzip.texi
@@ -6,8 +6,8 @@
 @finalout
 @c %**end of header
 
-@set UPDATED 17 September 2013
-@set VERSION 1.1
+@set UPDATED 20 January 2014
+@set VERSION 1.2-pre1
 
 @dircategory Data Compression
 @direntry
@@ -44,7 +44,8 @@ This manual is for Plzip (version @value{VERSION}, @value{UPDATED}).
 @end menu
 
 @sp 1
-Copyright @copyright{} 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz.
+Copyright @copyright{} 2009, 2010, 2011, 2012, 2013, 2014
+Antonio Diaz Diaz.
 
 This manual is free documentation: you have unlimited permission
 to copy, distribute and modify it.
@@ -60,12 +61,9 @@ the one of lzip, bzip2 or gzip.
 
 Plzip can compress/decompress large files on multiprocessor machines
 much faster than lzip, at the cost of a slightly reduced compression
-ratio. On files large enough (several GB), plzip can use hundreds of
-processors. On files of only a few MB it is better to use lzip.
-
-Plzip uses the same well-defined exit status values used by lzip and
-bzip2, which makes it safer when used in pipes or scripts than
-compressors returning ambiguous warning values, like gzip.
+ratio. Note that the number of usable threads is limited by file size,
+so on files larger than a few GB plzip can use hundreds of processors,
+but on files of only a few MB plzip is no faster than lzip.
 
 Plzip uses the lzip file format; the files produced by plzip are fully
 compatible with lzip-1.4 or newer, and can be rescued with lziprecover.
@@ -89,12 +87,29 @@ lziprecover program. Lziprecover makes lzip files resistant to bit-flip
 recovery capabilities, including error-checked merging of damaged copies
 of a file.
 
-Plzip replaces every file given in the command line with a compressed
-version of itself, with the name "original_name.lz". Each compressed
-file has the same modification date, permissions, and, when possible,
-ownership as the corresponding original, so that these properties can be
-correctly restored at decompression time. Plzip is able to read from some
-types of non regular files if the @samp{--stdout} option is specified.
+Plzip uses the same well-defined exit status values used by lzip and
+bzip2, which makes it safer than compressors returning ambiguous warning
+values (like gzip) when it is used as a back end for tar or zutils.
+
+When compressing, plzip replaces every file given in the command line
+with a compressed version of itself, with the name "original_name.lz".
+When decompressing, plzip attempts to guess the name for the decompressed
+file from that of the compressed file as follows:
+
+@multitable {anyothername} {becomes} {anyothername.out}
+@item filename.lz  @tab becomes @tab filename
+@item filename.tlz @tab becomes @tab filename.tar
+@item anyothername @tab becomes @tab anyothername.out
+@end multitable
+
+(De)compressing a file is much like copying or moving it; therefore plzip
+preserves the access and modification dates, permissions, and, when
+possible, ownership of the file just as "cp -p" does. (If the user ID or
+the group ID can't be duplicated, the file permission bits S_ISUID and
+S_ISGID are cleared).
+
+Plzip is able to read from some types of non regular files if the
+@samp{--stdout} option is specified.
 
 If no file names are specified, plzip compresses (or decompresses) from
 standard input to standard output. In this case, plzip will decline to
@@ -106,15 +121,6 @@ or more compressed files. The result is the concatenation of the
 corresponding uncompressed files. Integrity testing of concatenated
 compressed files is also supported.
 
-When decompressing, plzip attempts to guess the name for the decompressed
-file from that of the compressed file as follows:
-
-@multitable {anyothername} {becomes} {anyothername.out}
-@item filename.lz  @tab becomes @tab filename
-@item filename.tlz @tab becomes @tab filename.tar
-@item anyothername @tab becomes @tab anyothername.out
-@end multitable
-
 WARNING! Even if plzip is bug-free, other causes may result in a corrupt
 compressed file (bugs in the system libraries, memory errors, etc).
 Therefore, if the data you are going to compress is important, give the
@@ -171,6 +177,7 @@ Print the version number of plzip on the standard output and exit.
 
 @item -B @var{bytes}
 @itemx --data-size=@var{bytes}
+@anchor{--data-size}
 Set the input data block size in bytes. The input file will be divided
 in chunks of this size before compression is performed. Valid values
 range from 8 KiB to 1 GiB. Default value is two times the dictionary
@@ -212,6 +219,10 @@ as your system can support". If this option is not used, plzip tries to
 detect the number of processors in the system and use it as default
 value. @w{@samp{plzip --help}} shows the system's default value.
 
+Note that the number of usable threads is limited to @w{ceil( file_size
+/ data_size )} during compression (@pxref{--data-size}), and to the
+number of members in the input during decompression.
+
 @item -o @var{file}
 @itemx --output=@var{file}
 When reading from standard input and @samp{--stdout} has not been
@@ -245,7 +256,7 @@ Use it together with @samp{-v} to see information about the file.
 @itemx --verbose
 Verbose mode.@*
 When compressing, show the compression ratio for each file processed. A
-second -v shows the progress of compression.@*
+second @samp{-v} shows the progress of compression.@*
 When decompressing or testing, further -v's (up to 4) increase the
 verbosity level, showing status, compression ratio, decompressed size,
 and compressed size.
diff --git a/file_index.cc b/file_index.cc
index 452d0ab..f6250bd 100644
--- a/file_index.cc
+++ b/file_index.cc
@@ -1,5 +1,5 @@
 /*  Plzip - Parallel compressor compatible with lzip
-    Copyright (C) 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz.
+    Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Antonio Diaz Diaz.
 
     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
@@ -21,6 +21,7 @@
 #include <cstring>
 #include <string>
 #include <vector>
+#include <pthread.h>
 #include <stdint.h>
 #include <unistd.h>
 
diff --git a/file_index.h b/file_index.h
index 5493ffa..bba86b8 100644
--- a/file_index.h
+++ b/file_index.h
@@ -1,5 +1,5 @@
 /*  Plzip - Parallel compressor compatible with lzip
-    Copyright (C) 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz.
+    Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Antonio Diaz Diaz.
 
     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
diff --git a/lzip.h b/lzip.h
index dfb28ee..f39d270 100644
--- a/lzip.h
+++ b/lzip.h
@@ -1,5 +1,5 @@
 /*  Plzip - Parallel compressor compatible with lzip
-    Copyright (C) 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz.
+    Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Antonio Diaz Diaz.
 
     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
@@ -38,7 +38,7 @@ public:
     for( unsigned i = 0; i < filenames.size(); ++i )
       {
       const std::string & s = filenames[i];
-      const unsigned len = ( ( s == "-" ) ? stdin_name_len : s.size() );
+      const unsigned len = ( s == "-" ) ? stdin_name_len : s.size();
       if( len > longest_name ) longest_name = len;
       }
     if( longest_name == 0 ) longest_name = stdin_name_len;
@@ -135,9 +135,7 @@ struct File_trailer
     }
 
   void data_size( unsigned long long sz )
-    {
-    for( int i = 4; i <= 11; ++i ) { data[i] = (uint8_t)sz; sz >>= 8; }
-    }
+    { for( int i = 4; i <= 11; ++i ) { data[i] = (uint8_t)sz; sz >>= 8; } }
 
   unsigned long long member_size() const
     {
@@ -147,9 +145,7 @@ struct File_trailer
     }
 
   void member_size( unsigned long long sz )
-    {
-    for( int i = 12; i <= 19; ++i ) { data[i] = (uint8_t)sz; sz >>= 8; }
-    }
+    { for( int i = 12; i <= 19; ++i ) { data[i] = (uint8_t)sz; sz >>= 8; } }
   };
 
 
@@ -202,7 +198,7 @@ void show_error( const char * const msg, const int errcode = 0,
 void internal_error( const char * const msg );
 void show_progress( const int packet_size,
                     const Pretty_print * const p = 0,
-                    const struct stat * const in_statsp = 0 );
+                    const unsigned long long cfile_size = 0 );
 
 
 class Slot_tally
@@ -210,7 +206,7 @@ class Slot_tally
   const int num_slots;				// total slots
   int num_free;					// remaining free slots
   pthread_mutex_t mutex;
-  pthread_cond_t slot_av;			// free slot available
+  pthread_cond_t slot_av;			// slot available
 
   Slot_tally( const Slot_tally & );		// declared as private
   void operator=( const Slot_tally & );		// declared as private
diff --git a/main.cc b/main.cc
index 4998633..598731b 100644
--- a/main.cc
+++ b/main.cc
@@ -1,6 +1,6 @@
 /*  Plzip - Parallel compressor compatible with lzip
     Copyright (C) 2009 Laszlo Ersek.
-    Copyright (C) 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz.
+    Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Antonio Diaz Diaz.
 
     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
@@ -59,6 +59,10 @@
 #include "arg_parser.h"
 #include "lzip.h"
 
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
 #if CHAR_BIT != 8
 #error "Environments where CHAR_BIT != 8 are not supported."
 #endif
@@ -68,15 +72,9 @@ namespace {
 
 const char * const Program_name = "Plzip";
 const char * const program_name = "plzip";
-const char * const program_year = "2013";
+const char * const program_year = "2014";
 const char * invocation_name = 0;
 
-#ifdef O_BINARY
-const int o_binary = O_BINARY;
-#else
-const int o_binary = 0;
-#endif
-
 struct { const char * from; const char * to; } const known_extensions[] = {
   { ".lz",  ""     },
   { ".tlz", ".tar" },
@@ -247,7 +245,8 @@ int open_instream( const char * const name, struct stat * const in_statsp,
     }
   else
     {
-    infd = open( name, O_RDONLY | o_binary );
+    do infd = open( name, O_RDONLY | O_BINARY );
+    while( infd < 0 && errno == EINTR );
     if( infd < 0 )
       {
       if( verbosity >= 0 )
@@ -306,10 +305,11 @@ void set_d_outname( const std::string & name, const int i )
 
 bool open_outstream( const bool force )
   {
-  int flags = O_CREAT | O_WRONLY | o_binary;
+  int flags = O_CREAT | O_WRONLY | O_BINARY;
   if( force ) flags |= O_TRUNC; else flags |= O_EXCL;
 
-  outfd = open( output_filename.c_str(), flags, outfd_mode );
+  do outfd = open( output_filename.c_str(), flags, outfd_mode );
+  while( outfd < 0 && errno == EINTR );
   if( outfd < 0 && verbosity >= 0 )
     {
     if( errno == EEXIST )
@@ -346,10 +346,14 @@ void close_and_set_permissions( const struct stat * const in_statsp )
   bool warning = false;
   if( in_statsp )
     {
+    const mode_t mode = in_statsp->st_mode;
     // fchown will in many cases return with EPERM, which can be safely ignored.
-    if( ( fchown( outfd, in_statsp->st_uid, in_statsp->st_gid ) != 0 &&
-          errno != EPERM ) ||
-        fchmod( outfd, in_statsp->st_mode ) != 0 ) warning = true;
+    if( fchown( outfd, in_statsp->st_uid, in_statsp->st_gid ) == 0 )
+      { if( fchmod( outfd, mode ) != 0 ) warning = true; }
+    else
+      if( errno != EPERM ||
+          fchmod( outfd, mode & ~( S_ISUID | S_ISGID | S_ISVTX ) ) != 0 )
+        warning = true;
     }
   if( close( outfd ) != 0 ) cleanup_and_fail( 1 );
   outfd = -1;
@@ -455,27 +459,21 @@ void cleanup_and_fail( const int retval )
 
 void show_progress( const int packet_size,
                     const Pretty_print * const p,
-                    const struct stat * const in_statsp )
+                    const unsigned long long cfile_size )
   {
-  static unsigned long long cfile_size = 0;	// file_size / 100
+  static unsigned long long csize = 0;		// file_size / 100
   static unsigned long long pos = 0;
   static const Pretty_print * pp = 0;
-  static pthread_mutex_t mutex;
+  static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
 
   if( p )					// initialize static vars
-    {
-    if( !pp ) xinit( &mutex );			// init mutex only once
-    pos = 0; pp = p;
-    cfile_size = ( in_statsp && S_ISREG( in_statsp->st_mode ) ) ?
-                 in_statsp->st_size / 100 : 0;
-    return;
-    }
+    { csize = cfile_size; pos = 0; pp = p; return; }
   if( pp )
     {
     xlock( &mutex );
     pos += packet_size;
-    if( cfile_size > 0 )
-      std::fprintf( stderr, "%4llu%%", pos / cfile_size );
+    if( csize > 0 )
+      std::fprintf( stderr, "%4llu%%", pos / csize );
     std::fprintf( stderr, "  %.1f MB\r", pos / 1000000.0 );
     pp->reset(); (*pp)();			// restore cursor position
     xunlock( &mutex );
@@ -485,8 +483,8 @@ void show_progress( const int packet_size,
 
 int main( const int argc, const char * const argv[] )
   {
-  // Mapping from gzip/bzip2 style 1..9 compression modes
-  // to the corresponding LZMA compression modes.
+  /* Mapping from gzip/bzip2 style 1..9 compression modes
+     to the corresponding LZMA compression modes. */
   const Lzma_options option_mapping[] =
     {
     { 1 << 20,   5 },		// -0
@@ -566,8 +564,7 @@ int main( const int argc, const char * const argv[] )
     const char * const arg = parser.argument( argind ).c_str();
     switch( code )
       {
-      case '0':
-      case '1': case '2': case '3': case '4':
+      case '0': case '1': case '2': case '3': case '4':
       case '5': case '6': case '7': case '8': case '9':
                 encoder_options = option_mapping[code-'0']; break;
       case 'b': break;
@@ -692,8 +689,9 @@ int main( const int argc, const char * const argv[] )
     int tmp;
     if( program_mode == m_compress )
       {
-      show_progress( 0, &pp, in_statsp );	// initialize static vars
-      if( verbosity >= 2 ) show_progress( 0 );	// show initial zero size
+      if( verbosity >= 2 )
+        show_progress( 0, &pp, ( in_statsp && S_ISREG( in_statsp->st_mode ) ) ?
+                                 in_statsp->st_size / 100 : 0 );	// init
       tmp = compress( data_size, encoder_options.dictionary_size,
                       encoder_options.match_len_limit,
                       num_workers, infd, outfd, pp, debug_level );
diff --git a/testsuite/check.sh b/testsuite/check.sh
index 500636c..16676d4 100755
--- a/testsuite/check.sh
+++ b/testsuite/check.sh
@@ -1,6 +1,6 @@
 #! /bin/sh
 # check script for Plzip - Parallel compressor compatible with lzip
-# Copyright (C) 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz.
+# Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Antonio Diaz Diaz.
 #
 # This script is free software: you have unlimited permission
 # to copy, distribute and modify it.