99 lines
4 KiB
C++
99 lines
4 KiB
C++
/* Tarlz - Archiver with multimember lzip compression
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Copyright (C) 2013-2025 Antonio Diaz Diaz.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <sys/types.h> // uid_t, gid_t
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inline bool data_may_follow( const Typeflag typeflag )
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{ return typeflag == tf_regular || typeflag == tf_hiperf; }
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inline bool uid_gid_in_range( const long long uid, const long long gid )
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{ return uid == (long long)( (uid_t)uid ) &&
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gid == (long long)( (gid_t)gid ); }
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const char * const dotdot_msg = "Contains a '..' component, skipping.";
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const char * const cantln_msg = "Can't %slink '%s' to '%s'";
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const char * const mkdir_msg = "Can't create directory";
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const char * const mknod_msg = "Can't create device node";
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const char * const mkfifo_msg = "Can't create FIFO file";
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const char * const uftype_msg = "%s: Unknown file type 0x%02X, skipping.";
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const char * const chown_msg = "Can't change file owner";
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mode_t get_umask();
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struct Chdir_error {};
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class T_names // list of names in the argument of an option '-T'
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{
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char * buffer; // max 4 GiB for the whole -T file
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long file_size; // 0 for empty file
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std::vector< uint32_t > name_idx; // for each name in buffer
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std::vector< uint8_t > name_pending_; // 'uint8_t' for concurrent update
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public:
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explicit T_names( const char * const filename );
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~T_names() { if( buffer ) std::free( buffer ); buffer = 0; file_size = 0; }
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unsigned names() const { return name_idx.size(); }
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const char * name( const unsigned i ) const { return buffer + name_idx[i]; }
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bool name_pending( const unsigned i ) const { return name_pending_[i]; }
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void reset_name_pending( const unsigned i ) { name_pending_[i] = false; }
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};
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/* Lists of file names to be compared, deleted, extracted, or listed.
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name_pending_or_idx uses uint8_t instead of bool to allow concurrent
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update and provide space for 256 '-T' options. */
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struct Cl_names
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{
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// if parser.code( i ) == 'T', name_pending_or_idx[i] is the index in t_vec
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std::vector< uint8_t > name_pending_or_idx;
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std::vector< T_names * > t_vec;
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explicit Cl_names( const Arg_parser & parser );
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~Cl_names() { for( unsigned i = 0; i < t_vec.size(); ++i ) delete t_vec[i]; }
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T_names & t_names( const unsigned i )
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{ return *t_vec[name_pending_or_idx[i]]; }
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bool names_remain( const Arg_parser & parser ) const;
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};
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// defined in common_decode.cc
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bool check_skip_filename( const Cl_options & cl_opts, Cl_names & cl_names,
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const char * const filename, const int cwd_fd = -1,
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std::string * const msgp = 0 );
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bool format_member_name( const Extended & extended, const Tar_header header,
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Resizable_buffer & rbuf, const bool long_format );
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bool show_member_name( const Extended & extended, const Tar_header header,
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const int vlevel, Resizable_buffer & rbuf );
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// defined in decode_lz.cc
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struct Archive_descriptor; // forward declaration
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int decode_lz( const Cl_options & cl_opts, const Archive_descriptor & ad,
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Cl_names & cl_names );
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// defined in delete.cc
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bool safe_seek( const int fd, const long long pos );
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int tail_copy( const Arg_parser & parser, const Archive_descriptor & ad,
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Cl_names & cl_names, const long long istream_pos,
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const int outfd, int retval );
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// defined in delete_lz.cc
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int delete_members_lz( const Cl_options & cl_opts,
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const Archive_descriptor & ad,
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Cl_names & cl_names, const int outfd );
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