Merging upstream version 1.13.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1290 insertions, 0 deletions

diff --git a/minilzip.c b/minilzip.c
new file mode 100644
index 0000000..f9313b2
--- /dev/null
+++ b/minilzip.c
@@ -0,0 +1,1290 @@
+/* Minilzip - Test program for the library lzlib
+   Copyright (C) 2009-2022 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
+   the Free Software Foundation, either version 2 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/>.
+*/
+/*
+   Exit status: 0 for a normal exit, 1 for environmental problems
+   (file not found, invalid flags, I/O errors, etc), 2 to indicate a
+   corrupt or invalid input file, 3 for an internal consistency error
+   (e.g., bug) which caused minilzip to panic.
+*/
+
+#define _FILE_OFFSET_BITS 64
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <utime.h>
+#include <sys/stat.h>
+#if defined __MSVCRT__ || defined __OS2__ || defined __DJGPP__
+#include <io.h>
+#if defined __MSVCRT__
+#define fchmod(x,y) 0
+#define fchown(x,y,z) 0
+#define strtoull strtoul
+#define SIGHUP SIGTERM
+#define S_ISSOCK(x) 0
+#ifndef S_IRGRP
+#define S_IRGRP 0
+#define S_IWGRP 0
+#define S_IROTH 0
+#define S_IWOTH 0
+#endif
+#endif
+#if defined __DJGPP__
+#define S_ISSOCK(x) 0
+#define S_ISVTX 0
+#endif
+#endif
+
+#include "carg_parser.h"
+#include "lzlib.h"
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+#if CHAR_BIT != 8
+#error "Environments where CHAR_BIT != 8 are not supported."
+#endif
+
+#if ( defined  SIZE_MAX &&  SIZE_MAX < UINT_MAX ) || \
+    ( defined SSIZE_MAX && SSIZE_MAX <  INT_MAX )
+#error "Environments where 'size_t' is narrower than 'int' are not supported."
+#endif
+
+#ifndef max
+  #define max(x,y) ((x) >= (y) ? (x) : (y))
+#endif
+#ifndef min
+  #define min(x,y) ((x) <= (y) ? (x) : (y))
+#endif
+
+static void cleanup_and_fail( const int retval );
+static void show_error( const char * const msg, const int errcode,
+                        const bool help );
+static void show_file_error( const char * const filename,
+                             const char * const msg, const int errcode );
+static void internal_error( const char * const msg );
+static const char * const mem_msg = "Not enough memory.";
+
+int verbosity = 0;
+
+static const char * const program_name = "minilzip";
+static const char * const program_year = "2022";
+static const char * invocation_name = "minilzip";	/* default value */
+
+static const struct { const char * from; const char * to; } known_extensions[] = {
+  { ".lz",  ""     },
+  { ".tlz", ".tar" },
+  { 0,      0      } };
+
+struct Lzma_options
+  {
+  int dictionary_size;		/* 4 KiB .. 512 MiB */
+  int match_len_limit;		/* 5 .. 273 */
+  };
+
+enum Mode { m_compress, m_decompress, m_test };
+
+/* Variables used in signal handler context.
+   They are not declared volatile because the handler never returns. */
+static char * output_filename = 0;
+static int outfd = -1;
+static bool delete_output_on_interrupt = false;
+
+
+static void show_help( void )
+  {
+  printf( "Minilzip is a test program for the compression library lzlib, fully\n"
+          "compatible with lzip 1.4 or newer.\n"
+          "\nLzip is a lossless data compressor with a user interface similar to the one\n"
+          "of gzip or bzip2. Lzip uses a simplified form of the 'Lempel-Ziv-Markov\n"
+          "chain-Algorithm' (LZMA) stream format and provides a 3 factor integrity\n"
+          "checking to maximize interoperability and optimize safety. Lzip can compress\n"
+          "about as fast as gzip (lzip -0) or compress most files more than bzip2\n"
+          "(lzip -9). Decompression speed is intermediate between gzip and bzip2.\n"
+          "Lzip is better than gzip and bzip2 from a data recovery perspective. Lzip\n"
+          "has been designed, written, and tested with great care to replace gzip and\n"
+          "bzip2 as the standard general-purpose compressed format for unix-like\n"
+          "systems.\n"
+          "\nUsage: %s [options] [files]\n", invocation_name );
+  printf( "\nOptions:\n"
+          "  -h, --help                     display this help and exit\n"
+          "  -V, --version                  output version information and exit\n"
+          "  -a, --trailing-error           exit with error status if trailing data\n"
+          "  -b, --member-size=<bytes>      set member size limit in bytes\n"
+          "  -c, --stdout                   write to standard output, keep input files\n"
+          "  -d, --decompress               decompress\n"
+          "  -f, --force                    overwrite existing output files\n"
+          "  -F, --recompress               force re-compression of compressed files\n"
+          "  -k, --keep                     keep (don't delete) input files\n"
+          "  -m, --match-length=<bytes>     set match length limit in bytes [36]\n"
+          "  -o, --output=<file>            write to <file>, keep input files\n"
+          "  -q, --quiet                    suppress all messages\n"
+          "  -s, --dictionary-size=<bytes>  set dictionary size limit in bytes [8 MiB]\n"
+          "  -S, --volume-size=<bytes>      set volume size limit in bytes\n"
+          "  -t, --test                     test compressed file integrity\n"
+          "  -v, --verbose                  be verbose (a 2nd -v gives more)\n"
+          "  -0 .. -9                       set compression level [default 6]\n"
+          "      --fast                     alias for -0\n"
+          "      --best                     alias for -9\n"
+          "      --loose-trailing           allow trailing data seeming corrupt header\n"
+          "      --check-lib                compare version of lzlib.h with liblz.{a,so}\n"
+          "\nIf no file names are given, or if a file is '-', minilzip compresses or\n"
+          "decompresses from standard input to standard output.\n"
+          "Numbers may be followed by a multiplier: k = kB = 10^3 = 1000,\n"
+          "Ki = KiB = 2^10 = 1024, M = 10^6, Mi = 2^20, G = 10^9, Gi = 2^30, etc...\n"
+          "Dictionary sizes 12 to 29 are interpreted as powers of two, meaning 2^12\n"
+          "to 2^29 bytes.\n"
+          "\nThe bidimensional parameter space of LZMA can't be mapped to a linear\n"
+          "scale optimal for all files. If your files are large, very repetitive,\n"
+          "etc, you may need to use the options --dictionary-size and --match-length\n"
+          "directly to achieve optimal performance.\n"
+          "\nTo extract all the files from archive 'foo.tar.lz', use the commands\n"
+          "'tar -xf foo.tar.lz' or 'minilzip -cd foo.tar.lz | tar -xf -'.\n"
+          "\nExit status: 0 for a normal exit, 1 for environmental problems (file\n"
+          "not found, invalid flags, I/O errors, etc), 2 to indicate a corrupt or\n"
+          "invalid input file, 3 for an internal consistency error (e.g., bug) which\n"
+          "caused minilzip to panic.\n"
+          "\nThe ideas embodied in lzlib are due to (at least) the following people:\n"
+          "Abraham Lempel and Jacob Ziv (for the LZ algorithm), Andrey Markov (for the\n"
+          "definition of Markov chains), G.N.N. Martin (for the definition of range\n"
+          "encoding), Igor Pavlov (for putting all the above together in LZMA), and\n"
+          "Julian Seward (for bzip2's CLI).\n"
+          "\nReport bugs to lzip-bug@nongnu.org\n"
+          "Lzlib home page: http://www.nongnu.org/lzip/lzlib.html\n" );
+  }
+
+
+static void show_version( void )
+  {
+  printf( "%s %s\n", program_name, PROGVERSION );
+  printf( "Copyright (C) %s Antonio Diaz Diaz.\n", program_year );
+  printf( "Using lzlib %s\n", LZ_version() );
+  printf( "License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>\n"
+          "This is free software: you are free to change and redistribute it.\n"
+          "There is NO WARRANTY, to the extent permitted by law.\n" );
+  }
+
+
+static inline void set_retval( int * retval, const int new_val )
+  { if( *retval < new_val ) *retval = new_val; }
+
+
+static int check_lzlib_ver()	/* <major>.<minor> or <major>.<minor>[a-z.-]* */
+  {
+#if defined LZ_API_VERSION && LZ_API_VERSION >= 1012
+  const unsigned char * p = (unsigned char *)LZ_version_string;
+  unsigned major = 0, minor = 0;
+  while( major < 100000 && isdigit( *p ) )
+    { major *= 10; major += *p - '0'; ++p; }
+  if( *p == '.' ) ++p;
+  else
+out: { show_error( "Invalid LZ_version_string in lzlib.h", 0, false ); return 2; }
+  while( minor < 100 && isdigit( *p ) )
+    { minor *= 10; minor += *p - '0'; ++p; }
+  if( *p && *p != '-' && *p != '.' && !islower( *p ) ) goto out;
+  const unsigned version = major * 1000 + minor;
+  if( LZ_API_VERSION != version )
+    {
+    if( verbosity >= 0 )
+      fprintf( stderr, "%s: Version mismatch in lzlib.h: "
+               "LZ_API_VERSION = %u, should be %u.\n",
+               program_name, LZ_API_VERSION, version );
+    return 2;
+    }
+#endif
+  return 0;
+  }
+
+
+static int check_lib()
+  {
+  int retval = check_lzlib_ver();
+  if( strcmp( LZ_version_string, LZ_version() ) != 0 )
+    { set_retval( &retval, 1 );
+      if( verbosity >= 0 )
+        printf( "warning: LZ_version_string != LZ_version() (%s vs %s)\n",
+                LZ_version_string, LZ_version() ); }
+#if defined LZ_API_VERSION && LZ_API_VERSION >= 1012
+  if( LZ_API_VERSION != LZ_api_version() )
+    { set_retval( &retval, 1 );
+      if( verbosity >= 0 )
+        printf( "warning: LZ_API_VERSION != LZ_api_version() (%u vs %u)\n",
+                LZ_API_VERSION, LZ_api_version() ); }
+#endif
+  if( verbosity >= 1 )
+    {
+    printf( "Using lzlib %s\n", LZ_version() );
+#if !defined LZ_API_VERSION
+    fputs( "LZ_API_VERSION is not defined.\n", stdout );
+#elif LZ_API_VERSION >= 1012
+    printf( "Using LZ_API_VERSION = %u\n", LZ_api_version() );
+#else
+    printf( "Compiled with LZ_API_VERSION = %u. "
+            "Using an unknown LZ_API_VERSION\n", LZ_API_VERSION );
+#endif
+    }
+  return retval;
+  }
+
+
+/* assure at least a minimum size for buffer 'buf' */
+static void * resize_buffer( void * buf, const unsigned min_size )
+  {
+  if( buf ) buf = realloc( buf, min_size );
+  else buf = malloc( min_size );
+  if( !buf ) { show_error( mem_msg, 0, false ); cleanup_and_fail( 1 ); }
+  return buf;
+  }
+
+
+struct Pretty_print
+  {
+  const char * name;
+  char * padded_name;
+  const char * stdin_name;
+  unsigned longest_name;
+  bool first_post;
+  };
+
+static void Pp_init( struct Pretty_print * const pp,
+                     const char * const filenames[], const int num_filenames )
+  {
+  pp->name = 0;
+  pp->padded_name = 0;
+  pp->stdin_name = "(stdin)";
+  pp->longest_name = 0;
+  pp->first_post = false;
+
+  if( verbosity <= 0 ) return;
+  const unsigned stdin_name_len = strlen( pp->stdin_name );
+  int i;
+  for( i = 0; i < num_filenames; ++i )
+    {
+    const char * const s = filenames[i];
+    const unsigned len = (strcmp( s, "-" ) == 0) ? stdin_name_len : strlen( s );
+    if( pp->longest_name < len ) pp->longest_name = len;
+    }
+  if( pp->longest_name == 0 ) pp->longest_name = stdin_name_len;
+  }
+
+static void Pp_set_name( struct Pretty_print * const pp,
+                         const char * const filename )
+  {
+  unsigned name_len, padded_name_len, i = 0;
+
+  if( filename && filename[0] && strcmp( filename, "-" ) != 0 )
+    pp->name = filename;
+  else pp->name = pp->stdin_name;
+  name_len = strlen( pp->name );
+  padded_name_len = max( name_len, pp->longest_name ) + 4;
+  pp->padded_name = resize_buffer( pp->padded_name, padded_name_len + 1 );
+  while( i < 2 ) pp->padded_name[i++] = ' ';
+  while( i < name_len + 2 ) { pp->padded_name[i] = pp->name[i-2]; ++i; }
+  pp->padded_name[i++] = ':';
+  while( i < padded_name_len ) pp->padded_name[i++] = ' ';
+  pp->padded_name[i] = 0;
+  pp->first_post = true;
+  }
+
+static void Pp_reset( struct Pretty_print * const pp )
+  { if( pp->name && pp->name[0] ) pp->first_post = true; }
+
+static void Pp_show_msg( struct Pretty_print * const pp, const char * const msg )
+  {
+  if( verbosity < 0 ) return;
+  if( pp->first_post )
+    {
+    pp->first_post = false;
+    fputs( pp->padded_name, stderr );
+    if( !msg ) fflush( stderr );
+    }
+  if( msg ) fprintf( stderr, "%s\n", msg );
+  }
+
+
+static void show_header( const unsigned dictionary_size )
+  {
+  enum { factor = 1024 };
+  const char * const prefix[8] =
+    { "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi", "Yi" };
+  const char * p = "";
+  const char * np = "  ";
+  unsigned num = dictionary_size;
+  bool exact = ( num % factor == 0 );
+
+  int i; for( i = 0; i < 8 && ( num > 9999 || ( exact && num >= factor ) ); ++i )
+    { num /= factor; if( num % factor != 0 ) exact = false;
+      p = prefix[i]; np = ""; }
+  fprintf( stderr, "dict %s%4u %sB, ", np, num, p );
+  }
+
+
+/* separate large numbers >= 100_000 in groups of 3 digits using '_' */
+static const char * format_num3( unsigned long long num )
+  {
+  const char * const si_prefix = "kMGTPEZY";
+  const char * const binary_prefix = "KMGTPEZY";
+  enum { buffers = 8, bufsize = 4 * sizeof (long long) };
+  static char buffer[buffers][bufsize];	/* circle of static buffers for printf */
+  static int current = 0;
+  int i;
+  char * const buf = buffer[current++]; current %= buffers;
+  char * p = buf + bufsize - 1;		/* fill the buffer backwards */
+  *p = 0;	/* terminator */
+  if( num > 1024 )
+    {
+    char prefix = 0;			/* try binary first, then si */
+    for( i = 0; i < 8 && num >= 1024 && num % 1024 == 0; ++i )
+      { num /= 1024; prefix = binary_prefix[i]; }
+    if( prefix ) *(--p) = 'i';
+    else
+      for( i = 0; i < 8 && num >= 1000 && num % 1000 == 0; ++i )
+        { num /= 1000; prefix = si_prefix[i]; }
+    if( prefix ) *(--p) = prefix;
+    }
+  const bool split = num >= 100000;
+
+  for( i = 0; ; )
+    {
+    *(--p) = num % 10 + '0'; num /= 10; if( num == 0 ) break;
+    if( split && ++i >= 3 ) { i = 0; *(--p) = '_'; }
+    }
+  return p;
+  }
+
+
+static unsigned long long getnum( const char * const arg,
+                                  const char * const option_name,
+                                  const unsigned long long llimit,
+                                  const unsigned long long ulimit )
+  {
+  char * tail;
+  errno = 0;
+  unsigned long long result = strtoull( arg, &tail, 0 );
+  if( tail == arg )
+    {
+    if( verbosity >= 0 )
+      fprintf( stderr, "%s: Bad or missing numerical argument in "
+               "option '%s'.\n", program_name, option_name );
+    exit( 1 );
+    }
+
+  if( !errno && tail[0] )
+    {
+    const unsigned factor = ( tail[1] == 'i' ) ? 1024 : 1000;
+    int exponent = 0;				/* 0 = bad multiplier */
+    int i;
+    switch( tail[0] )
+      {
+      case 'Y': exponent = 8; break;
+      case 'Z': exponent = 7; break;
+      case 'E': exponent = 6; break;
+      case 'P': exponent = 5; break;
+      case 'T': exponent = 4; break;
+      case 'G': exponent = 3; break;
+      case 'M': exponent = 2; break;
+      case 'K': if( factor == 1024 ) exponent = 1; break;
+      case 'k': if( factor == 1000 ) exponent = 1; break;
+      }
+    if( exponent <= 0 )
+      {
+      if( verbosity >= 0 )
+        fprintf( stderr, "%s: Bad multiplier in numerical argument of "
+                 "option '%s'.\n", program_name, option_name );
+      exit( 1 );
+      }
+    for( i = 0; i < exponent; ++i )
+      {
+      if( ulimit / factor >= result ) result *= factor;
+      else { errno = ERANGE; break; }
+      }
+    }
+  if( !errno && ( result < llimit || result > ulimit ) ) errno = ERANGE;
+  if( errno )
+    {
+    if( verbosity >= 0 )
+      fprintf( stderr, "%s: Numerical argument out of limits [%s,%s] "
+               "in option '%s'.\n", program_name, format_num3( llimit ),
+               format_num3( ulimit ), option_name );
+    exit( 1 );
+    }
+  return result;
+  }
+
+
+static int get_dict_size( const char * const arg, const char * const option_name )
+  {
+  char * tail;
+  const long bits = strtol( arg, &tail, 0 );
+  if( bits >= LZ_min_dictionary_bits() &&
+      bits <= LZ_max_dictionary_bits() && *tail == 0 )
+    return 1 << bits;
+  int dictionary_size = getnum( arg, option_name, LZ_min_dictionary_size(),
+                                                  LZ_max_dictionary_size() );
+  if( dictionary_size == 65535 ) ++dictionary_size;	/* no fast encoder */
+  return dictionary_size;
+  }
+
+
+static void set_mode( enum Mode * const program_modep, const enum Mode new_mode )
+  {
+  if( *program_modep != m_compress && *program_modep != new_mode )
+    {
+    show_error( "Only one operation can be specified.", 0, true );
+    exit( 1 );
+    }
+  *program_modep = new_mode;
+  }
+
+
+static int extension_index( const char * const name )
+  {
+  int eindex;
+  for( eindex = 0; known_extensions[eindex].from; ++eindex )
+    {
+    const char * const ext = known_extensions[eindex].from;
+    const unsigned name_len = strlen( name );
+    const unsigned ext_len = strlen( ext );
+    if( name_len > ext_len &&
+        strncmp( name + name_len - ext_len, ext, ext_len ) == 0 )
+      return eindex;
+    }
+  return -1;
+  }
+
+
+static void set_c_outname( const char * const name, const bool force_ext,
+                           const bool multifile )
+  {
+  output_filename = resize_buffer( output_filename, strlen( name ) + 5 +
+                                   strlen( known_extensions[0].from ) + 1 );
+  strcpy( output_filename, name );
+  if( multifile ) strcat( output_filename, "00001" );
+  if( force_ext || multifile )
+    strcat( output_filename, known_extensions[0].from );
+  }
+
+
+static void set_d_outname( const char * const name, const int eindex )
+  {
+  const unsigned name_len = strlen( name );
+  if( eindex >= 0 )
+    {
+    const char * const from = known_extensions[eindex].from;
+    const unsigned from_len = strlen( from );
+    if( name_len > from_len )
+      {
+      output_filename = resize_buffer( output_filename, name_len +
+                                       strlen( known_extensions[eindex].to ) + 1 );
+      strcpy( output_filename, name );
+      strcpy( output_filename + name_len - from_len, known_extensions[eindex].to );
+      return;
+      }
+    }
+  output_filename = resize_buffer( output_filename, name_len + 4 + 1 );
+  strcpy( output_filename, name );
+  strcat( output_filename, ".out" );
+  if( verbosity >= 1 )
+    fprintf( stderr, "%s: Can't guess original name for '%s' -- using '%s'\n",
+             program_name, name, output_filename );
+  }
+
+
+static int open_instream( const char * const name, struct stat * const in_statsp,
+                          const enum Mode program_mode, const int eindex,
+                          const bool one_to_one, const bool recompress )
+  {
+  if( program_mode == m_compress && !recompress && eindex >= 0 )
+    {
+    if( verbosity >= 0 )
+      fprintf( stderr, "%s: Input file '%s' already has '%s' suffix.\n",
+               program_name, name, known_extensions[eindex].from );
+    return -1;
+    }
+  int infd = open( name, O_RDONLY | O_BINARY );
+  if( infd < 0 )
+    show_file_error( name, "Can't open input file", errno );
+  else
+    {
+    const int i = fstat( infd, in_statsp );
+    const mode_t mode = in_statsp->st_mode;
+    const bool can_read = ( i == 0 &&
+                            ( S_ISBLK( mode ) || S_ISCHR( mode ) ||
+                              S_ISFIFO( mode ) || S_ISSOCK( mode ) ) );
+    if( i != 0 || ( !S_ISREG( mode ) && ( !can_read || one_to_one ) ) )
+      {
+      if( verbosity >= 0 )
+        fprintf( stderr, "%s: Input file '%s' is not a regular file%s.\n",
+                 program_name, name, ( can_read && one_to_one ) ?
+                 ",\n          and neither '-c' nor '-o' were specified" : "" );
+      close( infd );
+      infd = -1;
+      }
+    }
+  return infd;
+  }
+
+
+static bool open_outstream( const bool force, const bool protect )
+  {
+  const mode_t usr_rw = S_IRUSR | S_IWUSR;
+  const mode_t all_rw = usr_rw | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
+  const mode_t outfd_mode = protect ? usr_rw : all_rw;
+  int flags = O_CREAT | O_WRONLY | O_BINARY;
+  if( force ) flags |= O_TRUNC; else flags |= O_EXCL;
+
+  outfd = open( output_filename, flags, outfd_mode );
+  if( outfd >= 0 ) delete_output_on_interrupt = true;
+  else if( verbosity >= 0 )
+    {
+    if( errno == EEXIST )
+      fprintf( stderr, "%s: Output file '%s' already exists, skipping.\n",
+               program_name, output_filename );
+    else
+      fprintf( stderr, "%s: Can't create output file '%s': %s\n",
+               program_name, output_filename, strerror( errno ) );
+    }
+  return ( outfd >= 0 );
+  }
+
+
+static void set_signals( void (*action)(int) )
+  {
+  signal( SIGHUP, action );
+  signal( SIGINT, action );
+  signal( SIGTERM, action );
+  }
+
+
+static void cleanup_and_fail( const int retval )
+  {
+  set_signals( SIG_IGN );			/* ignore signals */
+  if( delete_output_on_interrupt )
+    {
+    delete_output_on_interrupt = false;
+    if( verbosity >= 0 )
+      fprintf( stderr, "%s: Deleting output file '%s', if it exists.\n",
+               program_name, output_filename );
+    if( outfd >= 0 ) { close( outfd ); outfd = -1; }
+    if( remove( output_filename ) != 0 && errno != ENOENT )
+      show_error( "WARNING: deletion of output file (apparently) failed.", 0, false );
+    }
+  exit( retval );
+  }
+
+
+static void signal_handler( int sig )
+  {
+  if( sig ) {}				/* keep compiler happy */
+  show_error( "Control-C or similar caught, quitting.", 0, false );
+  cleanup_and_fail( 1 );
+  }
+
+
+static bool check_tty_in( const char * const input_filename, const int infd,
+                          const enum Mode program_mode, int * const retval )
+  {
+  if( ( program_mode == m_decompress || program_mode == m_test ) &&
+      isatty( infd ) )				/* for example /dev/tty */
+    { show_file_error( input_filename,
+                       "I won't read compressed data from a terminal.", 0 );
+      close( infd ); set_retval( retval, 2 );
+      if( program_mode != m_test ) cleanup_and_fail( *retval );
+      return false; }
+  return true;
+  }
+
+static bool check_tty_out( const enum Mode program_mode )
+  {
+  if( program_mode == m_compress && isatty( outfd ) )
+    { show_file_error( output_filename[0] ?
+                       output_filename : "(stdout)",
+                       "I won't write compressed data to a terminal.", 0 );
+      return false; }
+  return true;
+  }
+
+
+/* Set permissions, owner, and times. */
+static 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 )
+      { 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 )
+    {
+    show_error( "Error closing output file", errno, false );
+    cleanup_and_fail( 1 );
+    }
+  outfd = -1;
+  delete_output_on_interrupt = false;
+  if( in_statsp )
+    {
+    struct utimbuf t;
+    t.actime = in_statsp->st_atime;
+    t.modtime = in_statsp->st_mtime;
+    if( utime( output_filename, &t ) != 0 ) warning = true;
+    }
+  if( warning && verbosity >= 1 )
+    show_error( "Can't change output file attributes.", 0, false );
+  }
+
+
+/* Return the number of bytes really read.
+   If (value returned < size) and (errno == 0), means EOF was reached.
+*/
+static int readblock( const int fd, uint8_t * const buf, const int size )
+  {
+  int sz = 0;
+  errno = 0;
+  while( sz < size )
+    {
+    const int n = read( fd, buf + sz, size - sz );
+    if( n > 0 ) sz += n;
+    else if( n == 0 ) break;				/* EOF */
+    else if( errno != EINTR ) break;
+    errno = 0;
+    }
+  return sz;
+  }
+
+
+/* Return the number of bytes really written.
+   If (value returned < size), it is always an error.
+*/
+static int writeblock( const int fd, const uint8_t * const buf, const int size )
+  {
+  int sz = 0;
+  errno = 0;
+  while( sz < size )
+    {
+    const int n = write( fd, buf + sz, size - sz );
+    if( n > 0 ) sz += n;
+    else if( n < 0 && errno != EINTR ) break;
+    errno = 0;
+    }
+  return sz;
+  }
+
+
+static bool next_filename( void )
+  {
+  const unsigned name_len = strlen( output_filename );
+  const unsigned ext_len = strlen( known_extensions[0].from );
+  int i, j;
+  if( name_len >= ext_len + 5 )				/* "*00001.lz" */
+    for( i = name_len - ext_len - 1, j = 0; j < 5; --i, ++j )
+      {
+      if( output_filename[i] < '9' ) { ++output_filename[i]; return true; }
+      else output_filename[i] = '0';
+      }
+  return false;
+  }
+
+
+static int do_compress( struct LZ_Encoder * const encoder,
+                        const unsigned long long member_size,
+                        const unsigned long long volume_size, const int infd,
+                        struct Pretty_print * const pp,
+                        const struct stat * const in_statsp )
+  {
+  unsigned long long partial_volume_size = 0;
+  enum { buffer_size = 65536 };
+  uint8_t buffer[buffer_size];			/* read/write buffer */
+  if( verbosity >= 1 ) Pp_show_msg( pp, 0 );
+
+  while( true )
+    {
+    int in_size = 0;
+    while( LZ_compress_write_size( encoder ) > 0 )
+      {
+      const int size = min( LZ_compress_write_size( encoder ), buffer_size );
+      const int rd = readblock( infd, buffer, size );
+      if( rd != size && errno )
+        {
+        Pp_show_msg( pp, 0 ); show_error( "Read error", errno, false );
+        return 1;
+        }
+      if( rd > 0 && rd != LZ_compress_write( encoder, buffer, rd ) )
+        internal_error( "library error (LZ_compress_write)." );
+      if( rd < size ) LZ_compress_finish( encoder );
+/*      else LZ_compress_sync_flush( encoder ); */
+      in_size += rd;
+      }
+    const int out_size = LZ_compress_read( encoder, buffer, buffer_size );
+    if( out_size < 0 )
+      {
+      Pp_show_msg( pp, 0 );
+      if( verbosity >= 0 )
+        fprintf( stderr, "%s: LZ_compress_read error: %s\n",
+                 program_name, LZ_strerror( LZ_compress_errno( encoder ) ) );
+      return 1;
+      }
+    else if( out_size > 0 )
+      {
+      const int wr = writeblock( outfd, buffer, out_size );
+      if( wr != out_size )
+        {
+        Pp_show_msg( pp, 0 ); show_error( "Write error", errno, false );
+        return 1;
+        }
+      }
+    else if( in_size == 0 )
+      internal_error( "library error (LZ_compress_read)." );
+    if( LZ_compress_member_finished( encoder ) )
+      {
+      unsigned long long size;
+      if( LZ_compress_finished( encoder ) == 1 ) break;
+      if( volume_size > 0 )
+        {
+        partial_volume_size += LZ_compress_member_position( encoder );
+        if( partial_volume_size >= volume_size - LZ_min_dictionary_size() )
+          {
+          partial_volume_size = 0;
+          if( delete_output_on_interrupt )
+            {
+            close_and_set_permissions( in_statsp );
+            if( !next_filename() )
+              { Pp_show_msg( pp, "Too many volume files." ); return 1; }
+            if( !open_outstream( true, in_statsp ) ) return 1;
+            }
+          }
+        size = min( member_size, volume_size - partial_volume_size );
+        }
+      else
+        size = member_size;
+      if( LZ_compress_restart_member( encoder, size ) < 0 )
+        {
+        Pp_show_msg( pp, 0 );
+        if( verbosity >= 0 )
+          fprintf( stderr, "%s: LZ_compress_restart_member error: %s\n",
+                   program_name, LZ_strerror( LZ_compress_errno( encoder ) ) );
+        return 1;
+        }
+      }
+    }
+
+  if( verbosity >= 1 )
+    {
+    const unsigned long long in_size = LZ_compress_total_in_size( encoder );
+    const unsigned long long out_size = LZ_compress_total_out_size( encoder );
+    if( in_size == 0 || out_size == 0 )
+      fputs( " no data compressed.\n", stderr );
+    else
+      fprintf( stderr, "%6.3f:1, %5.2f%% ratio, %5.2f%% saved, "
+                       "%llu in, %llu out.\n",
+               (double)in_size / out_size,
+               ( 100.0 * out_size ) / in_size,
+               100.0 - ( ( 100.0 * out_size ) / in_size ),
+               in_size, out_size );
+    }
+  return 0;
+  }
+
+
+static int compress( const unsigned long long member_size,
+                     const unsigned long long volume_size, const int infd,
+                     const struct Lzma_options * const encoder_options,
+                     struct Pretty_print * const pp,
+                     const struct stat * const in_statsp )
+  {
+  struct LZ_Encoder * const encoder =
+    LZ_compress_open( encoder_options->dictionary_size,
+                      encoder_options->match_len_limit, ( volume_size > 0 ) ?
+                      min( member_size, volume_size ) : member_size );
+  int retval;
+
+  if( !encoder || LZ_compress_errno( encoder ) != LZ_ok )
+    {
+    if( !encoder || LZ_compress_errno( encoder ) == LZ_mem_error )
+      Pp_show_msg( pp, "Not enough memory. Try a smaller dictionary size." );
+    else
+      internal_error( "invalid argument to encoder." );
+    retval = 1;
+    }
+  else retval = do_compress( encoder, member_size, volume_size,
+                             infd, pp, in_statsp );
+  LZ_compress_close( encoder );
+  return retval;
+  }
+
+
+static int do_decompress( struct LZ_Decoder * const decoder, const int infd,
+                struct Pretty_print * const pp, const bool ignore_trailing,
+                const bool loose_trailing, const bool testing )
+  {
+  enum { buffer_size = 65536 };
+  uint8_t buffer[buffer_size];			/* read/write buffer */
+  unsigned long long total_in = 0;		/* to detect library stall */
+  bool first_member;
+
+  for( first_member = true; ; )
+    {
+    const int max_in_size =
+      min( LZ_decompress_write_size( decoder ), buffer_size );
+    int in_size = 0, out_size = 0;
+    if( max_in_size > 0 )
+      {
+      in_size = readblock( infd, buffer, max_in_size );
+      if( in_size != max_in_size && errno )
+        {
+        Pp_show_msg( pp, 0 ); show_error( "Read error", errno, false );
+        return 1;
+        }
+      if( in_size > 0 && in_size != LZ_decompress_write( decoder, buffer, in_size ) )
+        internal_error( "library error (LZ_decompress_write)." );
+      if( in_size < max_in_size ) LZ_decompress_finish( decoder );
+      }
+    while( true )
+      {
+      const int rd =
+        LZ_decompress_read( decoder, (outfd >= 0) ? buffer : 0, buffer_size );
+      if( rd > 0 )
+        {
+        out_size += rd;
+        if( outfd >= 0 )
+          {
+          const int wr = writeblock( outfd, buffer, rd );
+          if( wr != rd )
+            {
+            Pp_show_msg( pp, 0 ); show_error( "Write error", errno, false );
+            return 1;
+            }
+          }
+        }
+      else if( rd < 0 ) { out_size = rd; break; }
+      if( LZ_decompress_member_finished( decoder ) == 1 )
+        {
+        if( verbosity >= 1 )
+          {
+          const unsigned long long data_size = LZ_decompress_data_position( decoder );
+          const unsigned long long member_size = LZ_decompress_member_position( decoder );
+          if( verbosity >= 2 || ( verbosity == 1 && first_member ) )
+            Pp_show_msg( pp, 0 );
+          if( verbosity >= 2 )
+            {
+            if( verbosity >= 4 )
+              show_header( LZ_decompress_dictionary_size( decoder ) );
+            if( data_size == 0 || member_size == 0 )
+              fputs( "no data compressed. ", stderr );
+            else
+              fprintf( stderr, "%6.3f:1, %5.2f%% ratio, %5.2f%% saved. ",
+                     (double)data_size / member_size,
+                     ( 100.0 * member_size ) / data_size,
+                     100.0 - ( ( 100.0 * member_size ) / data_size ) );
+            if( verbosity >= 4 )
+              fprintf( stderr, "CRC %08X, ", LZ_decompress_data_crc( decoder ) );
+            if( verbosity >= 3 )
+              fprintf( stderr, "%9llu out, %8llu in. ", data_size, member_size );
+            fputs( testing ? "ok\n" : "done\n", stderr ); Pp_reset( pp );
+            }
+          }
+        first_member = false;		/* member decompressed successfully */
+        }
+      if( rd <= 0 ) break;
+      }
+    if( out_size < 0 || ( first_member && out_size == 0 ) )
+      {
+      const unsigned long long member_pos = LZ_decompress_member_position( decoder );
+      const enum LZ_Errno lz_errno = LZ_decompress_errno( decoder );
+      if( lz_errno == LZ_library_error )
+        internal_error( "library error (LZ_decompress_read)." );
+      if( member_pos <= 6 )
+        {
+        if( lz_errno == LZ_unexpected_eof )
+          {
+          if( first_member )
+            show_file_error( pp->name, "File ends unexpectedly at member header.", 0 );
+          else
+            Pp_show_msg( pp, "Truncated header in multimember file." );
+          return 2;
+          }
+        else if( lz_errno == LZ_data_error )
+          {
+          if( member_pos == 4 )
+            { if( verbosity >= 0 )
+              { Pp_show_msg( pp, 0 );
+                fprintf( stderr, "Version %d member format not supported.\n",
+                         LZ_decompress_member_version( decoder ) ); } }
+          else if( member_pos == 5 )
+            Pp_show_msg( pp, "Invalid dictionary size in member header." );
+          else if( first_member )	/* for lzlib older than 1.10 */
+            Pp_show_msg( pp, "Bad version or dictionary size in member header." );
+          else if( !loose_trailing )
+            Pp_show_msg( pp, "Corrupt header in multimember file." );
+          else if( !ignore_trailing )
+            Pp_show_msg( pp, "Trailing data not allowed." );
+          else break;				/* trailing data */
+          return 2;
+          }
+        }
+      if( lz_errno == LZ_header_error )
+        {
+        if( first_member )
+          show_file_error( pp->name,
+                           "Bad magic number (file not in lzip format).", 0 );
+        else if( !ignore_trailing )
+          Pp_show_msg( pp, "Trailing data not allowed." );
+        else break;				/* trailing data */
+        return 2;
+        }
+      if( lz_errno == LZ_mem_error ) { Pp_show_msg( pp, mem_msg ); return 1; }
+      if( verbosity >= 0 )
+        {
+        Pp_show_msg( pp, 0 );
+        fprintf( stderr, "%s at pos %llu\n", ( lz_errno == LZ_unexpected_eof ) ?
+                 "File ends unexpectedly" : "Decoder error",
+                 LZ_decompress_total_in_size( decoder ) );
+        }
+      return 2;
+      }
+    if( LZ_decompress_finished( decoder ) == 1 ) break;
+    if( in_size == 0 && out_size == 0 )
+      {
+      const unsigned long long size = LZ_decompress_total_in_size( decoder );
+      if( total_in == size ) internal_error( "library error (stalled)." );
+      total_in = size;
+      }
+    }
+  if( verbosity == 1 ) fputs( testing ? "ok\n" : "done\n", stderr );
+  return 0;
+  }
+
+
+static int decompress( const int infd, struct Pretty_print * const pp,
+                       const bool ignore_trailing,
+                       const bool loose_trailing, const bool testing )
+  {
+  struct LZ_Decoder * const decoder = LZ_decompress_open();
+  int retval;
+
+  if( !decoder || LZ_decompress_errno( decoder ) != LZ_ok )
+    { Pp_show_msg( pp, mem_msg ); retval = 1; }
+  else retval = do_decompress( decoder, infd, pp, ignore_trailing,
+                               loose_trailing, testing );
+  LZ_decompress_close( decoder );
+  return retval;
+  }
+
+
+static void show_error( const char * const msg, const int errcode,
+                        const bool help )
+  {
+  if( verbosity < 0 ) return;
+  if( msg && msg[0] )
+    fprintf( stderr, "%s: %s%s%s\n", program_name, msg,
+             ( errcode > 0 ) ? ": " : "",
+             ( errcode > 0 ) ? strerror( errcode ) : "" );
+  if( help )
+    fprintf( stderr, "Try '%s --help' for more information.\n",
+             invocation_name );
+  }
+
+
+static void show_file_error( const char * const filename,
+                             const char * const msg, const int errcode )
+  {
+  if( verbosity >= 0 )
+    fprintf( stderr, "%s: %s: %s%s%s\n", program_name, filename, msg,
+             ( errcode > 0 ) ? ": " : "",
+             ( errcode > 0 ) ? strerror( errcode ) : "" );
+  }
+
+
+static void internal_error( const char * const msg )
+  {
+  if( verbosity >= 0 )
+    fprintf( stderr, "%s: internal error: %s\n", program_name, msg );
+  exit( 3 );
+  }
+
+
+int main( const int argc, const char * const argv[] )
+  {
+  /* Mapping from gzip/bzip2 style 1..9 compression modes
+     to the corresponding LZMA compression modes. */
+  const struct Lzma_options option_mapping[] =
+    {
+    {   65535,  16 },		/* -0 (65535,16 chooses fast encoder) */
+    { 1 << 20,   5 },		/* -1 */
+    { 3 << 19,   6 },		/* -2 */
+    { 1 << 21,   8 },		/* -3 */
+    { 3 << 20,  12 },		/* -4 */
+    { 1 << 22,  20 },		/* -5 */
+    { 1 << 23,  36 },		/* -6 */
+    { 1 << 24,  68 },		/* -7 */
+    { 3 << 23, 132 },		/* -8 */
+    { 1 << 25, 273 } };		/* -9 */
+  struct Lzma_options encoder_options = option_mapping[6];  /* default = "-6" */
+  const unsigned long long max_member_size = 0x0008000000000000ULL; /* 2 PiB */
+  const unsigned long long max_volume_size = 0x4000000000000000ULL; /* 4 EiB */
+  unsigned long long member_size = max_member_size;
+  unsigned long long volume_size = 0;
+  const char * default_output_filename = "";
+  enum Mode program_mode = m_compress;
+  int i;
+  bool force = false;
+  bool ignore_trailing = true;
+  bool keep_input_files = false;
+  bool loose_trailing = false;
+  bool recompress = false;
+  bool to_stdout = false;
+  if( argc > 0 ) invocation_name = argv[0];
+
+  enum { opt_chk = 256, opt_lt };
+  const struct ap_Option options[] =
+    {
+    { '0', "fast",              ap_no  },
+    { '1', 0,                   ap_no  },
+    { '2', 0,                   ap_no  },
+    { '3', 0,                   ap_no  },
+    { '4', 0,                   ap_no  },
+    { '5', 0,                   ap_no  },
+    { '6', 0,                   ap_no  },
+    { '7', 0,                   ap_no  },
+    { '8', 0,                   ap_no  },
+    { '9', "best",              ap_no  },
+    { 'a', "trailing-error",    ap_no  },
+    { 'b', "member-size",       ap_yes },
+    { 'c', "stdout",            ap_no  },
+    { 'd', "decompress",        ap_no  },
+    { 'f', "force",             ap_no  },
+    { 'F', "recompress",        ap_no  },
+    { 'h', "help",              ap_no  },
+    { 'k', "keep",              ap_no  },
+    { 'm', "match-length",      ap_yes },
+    { 'n', "threads",           ap_yes },
+    { 'o', "output",            ap_yes },
+    { 'q', "quiet",             ap_no  },
+    { 's', "dictionary-size",   ap_yes },
+    { 'S', "volume-size",       ap_yes },
+    { 't', "test",              ap_no  },
+    { 'v', "verbose",           ap_no  },
+    { 'V', "version",           ap_no  },
+    { opt_chk, "check-lib",     ap_no  },
+    { opt_lt, "loose-trailing", ap_no  },
+    {  0, 0,                    ap_no  } };
+
+  /* static because valgrind complains and memory management in C sucks */
+  static struct Arg_parser parser;
+  if( !ap_init( &parser, argc, argv, options, 0 ) )
+    { show_error( mem_msg, 0, false ); return 1; }
+  if( ap_error( &parser ) )				/* bad option */
+    { show_error( ap_error( &parser ), 0, true ); return 1; }
+
+  int argind = 0;
+  for( ; argind < ap_arguments( &parser ); ++argind )
+    {
+    const int code = ap_code( &parser, argind );
+    if( !code ) break;					/* no more options */
+    const char * const pn = ap_parsed_name( &parser, argind );
+    const char * const arg = ap_argument( &parser, argind );
+    switch( code )
+      {
+      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 'a': ignore_trailing = false; break;
+      case 'b': member_size = getnum( arg, pn, 100000, max_member_size ); break;
+      case 'c': to_stdout = true; break;
+      case 'd': set_mode( &program_mode, m_decompress ); break;
+      case 'f': force = true; break;
+      case 'F': recompress = true; break;
+      case 'h': show_help(); return 0;
+      case 'k': keep_input_files = true; break;
+      case 'm': encoder_options.match_len_limit =
+                  getnum( arg, pn, LZ_min_match_len_limit(),
+                                   LZ_max_match_len_limit() ); break;
+      case 'n': break;
+      case 'o': if( strcmp( arg, "-" ) == 0 ) to_stdout = true;
+                else { default_output_filename = arg; } break;
+      case 'q': verbosity = -1; break;
+      case 's': encoder_options.dictionary_size = get_dict_size( arg, pn );
+                break;
+      case 'S': volume_size = getnum( arg, pn, 100000, max_volume_size ); break;
+      case 't': set_mode( &program_mode, m_test ); break;
+      case 'v': if( verbosity < 4 ) ++verbosity; break;
+      case 'V': show_version(); return 0;
+      case opt_chk: return check_lib();
+      case opt_lt: loose_trailing = true; break;
+      default : internal_error( "uncaught option." );
+      }
+    } /* end process options */
+
+  if( strcmp( PROGVERSION, LZ_version_string ) != 0 )
+    internal_error( "wrong PROGVERSION." );
+#if !defined LZ_API_VERSION || LZ_API_VERSION < 1012
+#error "lzlib 1.12 or newer needed."
+#else
+  if( LZ_api_version() < 1012 )	/* minilzip passes null to LZ_decompress_read */
+    { show_error( "lzlib 1.12 or newer needed. Try --check-lib.", 0, false );
+      return 1; }
+  if( LZ_api_version() != LZ_API_VERSION ) show_error(
+    "warning: wrong library API version. Try --check-lib.", 0, false );
+  else
+#endif
+  if( strcmp( LZ_version_string, LZ_version() ) != 0 ) show_error(
+    "warning: wrong library version_string. Try --check-lib.", 0, false );
+
+#if defined __MSVCRT__ || defined __OS2__ || defined __DJGPP__
+  setmode( STDIN_FILENO, O_BINARY );
+  setmode( STDOUT_FILENO, O_BINARY );
+#endif
+
+  static const char ** filenames = 0;
+  int num_filenames = max( 1, ap_arguments( &parser ) - argind );
+  filenames = resize_buffer( filenames, num_filenames * sizeof filenames[0] );
+  filenames[0] = "-";
+
+  bool filenames_given = false;
+  for( i = 0; argind + i < ap_arguments( &parser ); ++i )
+    {
+    filenames[i] = ap_argument( &parser, argind + i );
+    if( strcmp( filenames[i], "-" ) != 0 ) filenames_given = true;
+    }
+
+  if( program_mode == m_compress )
+    {
+    if( volume_size > 0 && !to_stdout && default_output_filename[0] &&
+        num_filenames > 1 )
+      { show_error( "Only can compress one file when using '-o' and '-S'.",
+                    0, true ); return 1; }
+    }
+  else volume_size = 0;
+  if( program_mode == m_test ) to_stdout = false;	/* apply overrides */
+  if( program_mode == m_test || to_stdout ) default_output_filename = "";
+
+  output_filename = resize_buffer( output_filename, 1 );
+  output_filename[0] = 0;
+  if( to_stdout && program_mode != m_test )	/* check tty only once */
+    { outfd = STDOUT_FILENO; if( !check_tty_out( program_mode ) ) return 1; }
+  else outfd = -1;
+
+  const bool to_file = !to_stdout && program_mode != m_test &&
+                       default_output_filename[0];
+  if( !to_stdout && program_mode != m_test && ( filenames_given || to_file ) )
+    set_signals( signal_handler );
+
+  static struct Pretty_print pp;
+  Pp_init( &pp, filenames, num_filenames );
+
+  int failed_tests = 0;
+  int retval = 0;
+  const bool one_to_one = !to_stdout && program_mode != m_test && !to_file;
+  bool stdin_used = false;
+  for( i = 0; i < num_filenames; ++i )
+    {
+    const char * input_filename = "";
+    int infd;
+    struct stat in_stats;
+
+    Pp_set_name( &pp, filenames[i] );
+    if( strcmp( filenames[i], "-" ) == 0 )
+      {
+      if( stdin_used ) continue; else stdin_used = true;
+      infd = STDIN_FILENO;
+      if( !check_tty_in( pp.name, infd, program_mode, &retval ) ) continue;
+      if( one_to_one ) { outfd = STDOUT_FILENO; output_filename[0] = 0; }
+      }
+    else
+      {
+      const int eindex = extension_index( input_filename = filenames[i] );
+      infd = open_instream( input_filename, &in_stats, program_mode,
+                            eindex, one_to_one, recompress );
+      if( infd < 0 ) { set_retval( &retval, 1 ); continue; }
+      if( !check_tty_in( pp.name, infd, program_mode, &retval ) ) continue;
+      if( one_to_one )			/* open outfd after verifying infd */
+        {
+        if( program_mode == m_compress )
+          set_c_outname( input_filename, true, volume_size > 0 );
+        else set_d_outname( input_filename, eindex );
+        if( !open_outstream( force, true ) )
+          { close( infd ); set_retval( &retval, 1 ); continue; }
+        }
+      }
+
+    if( one_to_one && !check_tty_out( program_mode ) )
+      { set_retval( &retval, 1 ); return retval; }	/* don't delete a tty */
+
+    if( to_file && outfd < 0 )		/* open outfd after verifying infd */
+      {
+      if( program_mode == m_compress ) set_c_outname( default_output_filename,
+                                       false, volume_size > 0 );
+      else
+        { output_filename = resize_buffer( output_filename,
+                            strlen( default_output_filename ) + 1 );
+          strcpy( output_filename, default_output_filename ); }
+      if( !open_outstream( force, false ) || !check_tty_out( program_mode ) )
+        return 1;	/* check tty only once and don't try to delete a tty */
+      }
+
+    const struct stat * const in_statsp =
+      ( input_filename[0] && one_to_one ) ? &in_stats : 0;
+    int tmp;
+    if( program_mode == m_compress )
+      tmp = compress( member_size, volume_size, infd, &encoder_options, &pp,
+                      in_statsp );
+    else
+      tmp = decompress( infd, &pp, ignore_trailing,
+                        loose_trailing, program_mode == m_test );
+    if( close( infd ) != 0 )
+      { show_file_error( pp.name, "Error closing input file", errno );
+        set_retval( &tmp, 1 ); }
+    set_retval( &retval, tmp );
+    if( tmp )
+      { if( program_mode != m_test ) cleanup_and_fail( retval );
+        else ++failed_tests; }
+
+    if( delete_output_on_interrupt && one_to_one )
+      close_and_set_permissions( in_statsp );
+    if( input_filename[0] && !keep_input_files && one_to_one &&
+        ( program_mode != m_compress || volume_size == 0 ) )
+      remove( input_filename );
+    }
+  if( delete_output_on_interrupt ) close_and_set_permissions( 0 );	/* -o */
+  else if( outfd >= 0 && close( outfd ) != 0 )				/* -c */
+    {
+    show_error( "Error closing stdout", errno, false );
+    set_retval( &retval, 1 );
+    }
+  if( failed_tests > 0 && verbosity >= 1 && num_filenames > 1 )
+    fprintf( stderr, "%s: warning: %d %s failed the test.\n",
+             program_name, failed_tests,
+             ( failed_tests == 1 ) ? "file" : "files" );
+  free( output_filename );
+  free( filenames );
+  ap_free( &parser );
+  return retval;
+  }