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/* Zutils - Utilities dealing with compressed files
Copyright (C) 2009, 2010, 2011, 2012, 2013 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 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
const char * const Program_name = "Zutils";
const char * const program_name = "zutils";
const char * const program_year = "2013";
extern const char * invocation_name;
extern const char * util_name;
extern int verbosity;
enum { fmt_bz2, fmt_gz, fmt_lz, fmt_xz, num_formats };
const char * const format_names[num_formats] = { "bz2", "gz", "lz", "xz" };
const char * const simple_extensions[num_formats] =
{ ".bz2", ".gz", ".lz", ".xz" };
const char * const decompressor_names[num_formats] =
{ "bzip2", "gzip", "lzip", "xz" };
const int8_t format_order[num_formats] =
{ fmt_gz, fmt_lz, fmt_bz2, fmt_xz }; // search order
// first magic byte must be different among formats
enum { bzip2_magic_size = 3,
gzip_magic_size = 2,
lzip_magic_size = 4,
xz_magic_size = 5 };
const uint8_t bzip2_magic[bzip2_magic_size] =
{ 0x42, 0x5A, 0x68 }; // "BZh"
const uint8_t gzip_magic[gzip_magic_size] =
{ 0x1F, 0x8B };
const uint8_t lzip_magic[lzip_magic_size] =
{ 0x4C, 0x5A, 0x49, 0x50 }; // "LZIP"
const uint8_t xz_magic[xz_magic_size] =
{ 0xFD, 0x37, 0x7A, 0x58, 0x5A }; // 0xFD, "7zXZ"
int get_format_type( const std::string & arg );
int readblock( const int fd, uint8_t * const buf, const int size );
int writeblock( const int fd, const uint8_t * const buf, const int size );
bool feed_data( const int infd, const int outfd,
const uint8_t * magic_data, const int magic_size );
bool set_data_feeder( int * const infdp, pid_t * const pidp,
const int format_type );
void show_help_addr();
void show_version( const char * const Util_name = 0 );
void show_error( const char * const msg, const int errcode = 0,
const bool help = false );
void show_error2( const char * const msg, const char * const name );
void show_close_error( const char * const prog_name );
void show_exec_error( const char * const prog_name );
void show_fork_error( const char * const prog_name );
void internal_error( const char * const msg );
const char * test_format( const int infd,
const uint8_t ** const magic_datap,
int * const magic_sizep );
// Returns exit status of child process 'pid', or 'eretval' in case of error.
//
int wait_for_child( const pid_t pid, const char * const name,
const int eretval = 2 );
// Returns -1 if child not terminated, 'eretval' in case of error, or
// exit status of child process 'pid'.
//
int child_status( const pid_t pid, const char * const name,
const int eretval = 2 );
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