lzip/tarlz
1
0
Fork 0
Code Issues Activity

Adding upstream version 0.9.

Browse source 
Signed-off-by: Daniel Baumann <daniel@debian.org>
This commit is contained in:
Daniel Baumann 2025-02-17 21:10:27 +01:00
parent 9bbbd387b8
commit 7cf0407517
Signed by: daniel
GPG key ID: FBB4F0E80A80222F
25 changed files with 1761 additions and 353 deletions
Download patch file Download diff file Expand all files Collapse all files

113
main.cc
View file

@ -1,5 +1,5 @@
/* Tarlz - Archiver with multimember lzip compression
Copyright (C) 2013-2018 Antonio Diaz Diaz.
Copyright (C) 2013-2019 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
@ -32,15 +32,16 @@
#include <string>
#include <vector>
#include <fcntl.h>
#include <pthread.h>
#include <stdint.h>
#include <unistd.h>
#include <sys/stat.h>
#include <grp.h>
#include <pwd.h>
#include <lzlib.h>
#if defined(__OS2__)
#include <io.h>
#endif
#include <lzlib.h>
#include "arg_parser.h"
#include "tarlz.h"
@ -58,21 +59,23 @@ int verbosity = 0;
namespace {
const char * const program_name = "tarlz";
const char * const program_year = "2018";
const char * const program_year = "2019";
const char * invocation_name = 0;
enum Mode { m_none, m_append, m_concatenate, m_create, m_extract, m_list };
void show_help()
void show_help( const long num_online )
{
std::printf( "Tarlz is a small and simple implementation of the tar archiver. By default\n"
"tarlz creates, lists and extracts archives in a simplified posix pax format\n"
"compressed with lzip on a per file basis. Each tar member is compressed in\n"
"its own lzip member, as well as the end-of-file blocks. This method is fully\n"
"backward compatible with standard tar tools like GNU tar, which treat the\n"
"resulting multimember tar.lz archive like any other tar.lz archive. Tarlz\n"
"can append files to the end of such compressed archives.\n"
std::printf( "Tarlz is a combined implementation of the tar archiver and the lzip\n"
"compressor. By default tarlz creates, lists and extracts archives in a\n"
"simplified posix pax format compressed with lzip on a per file basis. Each\n"
"tar member is compressed in its own lzip member, as well as the end-of-file\n"
"blocks. This method adds an indexed lzip layer on top of the tar archive,\n"
"making it possible to decode the archive safely in parallel. The resulting\n"
"multimember tar.lz archive is fully backward compatible with standard tar\n"
"tools like GNU tar, which treat it like any other tar.lz archive. Tarlz can\n"
"append files to the end of such compressed archives.\n"
"\nThe tarlz file format is a safe posix-style backup format. In case of\n"
"corruption, tarlz can extract all the undamaged members from the tar.lz\n"
"archive, skipping over the damaged members, just like the standard\n"
@ -87,6 +90,7 @@ void show_help()
" -c, --create create a new archive\n"
" -C, --directory=<dir> change to directory <dir>\n"
" -f, --file=<archive> use archive file <archive>\n"
" -n, --threads=<n> set number of decompression threads [%ld]\n"
" -q, --quiet suppress all messages\n"
" -r, --append append files to the end of an archive\n"
" -t, --list list the contents of an archive\n"
@ -103,8 +107,13 @@ void show_help()
" --keep-damaged don't delete partially extracted files\n"
" --missing-crc exit with error status if missing extended CRC\n"
// " --permissive allow repeated extended headers and records\n"
" --uncompressed don't compress the archive created\n"
"\nExit status: 0 for a normal exit, 1 for environmental problems (file\n"
" --uncompressed don't compress the archive created\n",
num_online );
if( verbosity >= 1 )
{
std::printf( " --debug=<level> (0-1) print debug statistics to stderr\n" );
}
std::printf( "\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 (eg, bug) which\n"
"caused tarlz to panic.\n"
@ -189,7 +198,8 @@ void set_owner( const char * const arg )
{
const struct passwd * const pw = getpwnam( arg );
if( pw ) cl_owner = pw->pw_uid;
else if( std::isdigit( arg[0] ) ) cl_owner = getnum( arg, 0, INT_MAX );
else if( std::isdigit( (unsigned char)arg[0] ) )
cl_owner = getnum( arg, 0, INT_MAX );
else { show_file_error( arg, "Invalid owner" ); std::exit( 1 ); }
}
@ -197,7 +207,8 @@ void set_group( const char * const arg )
{
const struct group * const gr = getgrnam( arg );
if( gr ) cl_group = gr->gr_gid;
else if( std::isdigit( arg[0] ) ) cl_group = getnum( arg, 0, INT_MAX );
else if( std::isdigit( (unsigned char)arg[0] ) )
cl_group = getnum( arg, 0, INT_MAX );
else { show_file_error( arg, "Invalid group" ); std::exit( 1 ); }
}
@ -226,43 +237,6 @@ int open_outstream( const std::string & name, const bool create )
}
/* Returns the number of bytes really read.
If (returned value < size) and (errno == 0), means EOF was reached.
*/
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;
}
/* Returns the number of bytes really written.
If (returned value < size), it is always an error.
*/
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;
}
void show_error( const char * const msg, const int errcode, const bool help )
{
if( verbosity < 0 ) return;
@ -297,8 +271,10 @@ void internal_error( const char * const msg )
int main( const int argc, const char * const argv[] )
{
std::string archive_name;
int debug_level = 0;
int num_workers = -1; // start this many worker threads
int level = 6; // compression level, < 0 means uncompressed
Mode program_mode = m_none;
int level = 6; // compression level, < 0 = uncompressed
bool keep_damaged = false;
bool missing_crc = false;
bool permissive = false;
@ -308,8 +284,8 @@ int main( const int argc, const char * const argv[] )
{ show_error( "Bad library version. At least lzlib 1.0 is required." );
return 1; }
enum { opt_ano = 256, opt_aso, opt_crc, opt_dso, opt_grp, opt_kd, opt_nso,
opt_own, opt_per, opt_sol, opt_un };
enum { opt_ano = 256, opt_aso, opt_crc, opt_dbg, opt_dso, opt_grp, opt_kd,
opt_nso, opt_own, opt_per, opt_sol, opt_un };
const Arg_parser::Option options[] =
{
{ '0', 0, Arg_parser::no },
@ -328,6 +304,7 @@ int main( const int argc, const char * const argv[] )
{ 'f', "file", Arg_parser::yes },
{ 'h', "help", Arg_parser::no },
{ 'H', "format", Arg_parser::yes },
{ 'n', "threads", Arg_parser::yes },
{ 'q', "quiet", Arg_parser::no },
{ 'r', "append", Arg_parser::no },
{ 't', "list", Arg_parser::no },
@ -336,6 +313,7 @@ int main( const int argc, const char * const argv[] )
{ 'x', "extract", Arg_parser::no },
{ opt_ano, "anonymous", Arg_parser::no },
{ opt_aso, "asolid", Arg_parser::no },
{ opt_dbg, "debug", Arg_parser::yes },
{ opt_dso, "dsolid", Arg_parser::no },
{ opt_grp, "group", Arg_parser::yes },
{ opt_kd, "keep-damaged", Arg_parser::no },
@ -351,6 +329,11 @@ int main( const int argc, const char * const argv[] )
if( parser.error().size() ) // bad option
{ show_error( parser.error().c_str(), 0, true ); return 1; }
const long num_online = std::max( 1L, sysconf( _SC_NPROCESSORS_ONLN ) );
long max_workers = sysconf( _SC_THREAD_THREADS_MAX );
if( max_workers < 1 || max_workers > INT_MAX / (int)sizeof (pthread_t) )
max_workers = INT_MAX / sizeof (pthread_t);
int filenames = 0;
for( int argind = 0; argind < parser.arguments(); ++argind )
{
@ -367,8 +350,9 @@ int main( const int argc, const char * const argv[] )
case 'c': set_mode( program_mode, m_create ); break;
case 'C': break; // skip chdir
case 'f': if( sarg != "-" ) archive_name = sarg; break;
case 'h': show_help(); return 0;
case 'h': show_help( num_online ); return 0;
case 'H': break; // ignore format
case 'n': num_workers = getnum( arg, 0, max_workers ); break;
case 'q': verbosity = -1; break;
case 'r': set_mode( program_mode, m_append ); break;
case 't': set_mode( program_mode, m_list ); break;
@ -376,15 +360,16 @@ int main( const int argc, const char * const argv[] )
case 'V': show_version(); return 0;
case 'x': set_mode( program_mode, m_extract ); break;
case opt_ano: set_owner( "root" ); set_group( "root" ); break;
case opt_aso: cl_solid = 2; break;
case opt_aso: solidity = asolid; break;
case opt_crc: missing_crc = true; break;
case opt_dso: cl_solid = 1; break;
case opt_dbg: debug_level = getnum( arg, 0, 3 ); break;
case opt_dso: solidity = dsolid; break;
case opt_grp: set_group( arg ); break;
case opt_kd: keep_damaged = true; break;
case opt_nso: cl_solid = 0; break;
case opt_nso: solidity = no_solid; break;
case opt_own: set_owner( arg ); break;
case opt_per: permissive = true; break;
case opt_sol: cl_solid = 3; break;
case opt_sol: solidity = solid; break;
case opt_un: level = -1; break;
default : internal_error( "uncaught option" );
}
@ -395,6 +380,8 @@ int main( const int argc, const char * const argv[] )
setmode( STDOUT_FILENO, O_BINARY );
#endif
if( num_workers < 0 ) num_workers = std::min( num_online, max_workers );
switch( program_mode )
{
case m_none: show_error( "Missing operation.", 0, true ); return 2;
@ -403,8 +390,8 @@ int main( const int argc, const char * const argv[] )
program_mode == m_append );
case m_concatenate: return concatenate( archive_name, parser, filenames );
case m_extract:
case m_list: return decode( archive_name, parser, filenames,
keep_damaged, program_mode == m_list,
missing_crc, permissive );
case m_list: return decode( archive_name, parser, filenames, num_workers,
debug_level, keep_damaged, program_mode == m_list,
missing_crc, permissive );
}
}