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Merging upstream version 1.9.

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Signed-off-by: Daniel Baumann <daniel@debian.org>
This commit is contained in:
Daniel Baumann 2025-02-24 05:59:37 +01:00
parent 3e7d50525b
commit 13941d3cbe
Signed by: daniel
GPG key ID: FBB4F0E80A80222F
30 changed files with 1188 additions and 1060 deletions
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83
zdiff.cc
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@ -1,18 +1,18 @@
/* Zdiff - decompress and compare two files line by line
Copyright (C) 2010-2019 Antonio Diaz Diaz.
/* Zdiff - decompress and compare two files line by line
Copyright (C) 2010-2020 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 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.
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/>.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define _FILE_OFFSET_BITS 64
@ -39,6 +39,7 @@
#include "rc.h"
#include "zutils.h"
// 'verbosity' is always 0 in zdiff; no --verbose or --quiet available.
namespace {
@ -48,23 +49,23 @@ std::string fifonames[2]; // names of the two fifos passed to diff
void show_help()
{
std::printf( "Zdiff compares two files ('-' means standard input), and if they\n"
"differ, shows the differences line by line. If any given file is\n"
"compressed, its decompressed content is used. Zdiff is a front end to\n"
"the diff program and has the limitation that messages from diff refer to\n"
"temporary filenames instead of those specified.\n"
"\nThe formats supported are bzip2, gzip, lzip and xz.\n"
std::printf( "zdiff compares two files and, if they differ, writes to standard output the\n"
"differences line by line. A hyphen '-' used as a file argument means standard\n"
"input. If any file given is compressed, its decompressed content is used.\n"
"zdiff is a front end to the program diff and has the limitation that messages\n"
"from diff refer to temporary file names instead of those specified.\n"
"\nThe formats supported are bzip2, gzip, lzip, and xz.\n"
"\nUsage: zdiff [options] file1 [file2]\n"
"\nZdiff compares file1 to file2. If file2 is omitted zdiff tries the\n"
"\nzdiff compares file1 to file2. The standard input is used only if file1 or\n"
"file2 refers to standard input. If file2 is omitted zdiff tries the\n"
"following:\n"
"\n 1. If file1 is compressed, compares its decompressed contents with\n"
"\n - If file1 is compressed, compares its decompressed contents with\n"
" the corresponding uncompressed file (the name of file1 with the\n"
" extension removed).\n"
"\n 2. If file1 is uncompressed, compares it with the decompressed\n"
"\n - If file1 is uncompressed, compares it with the decompressed\n"
" contents of file1.[lz|bz2|gz|xz] (the first one that is found).\n"
"\n 3. If no suitable file is found, compares file1 with data read from\n"
" standard input.\n"
"\nExit status is 0 if inputs are identical, 1 if different, 2 if trouble.\n"
"Some options only work if the diff program used supports them.\n"
"\nOptions:\n"
" -h, --help display this help and exit\n"
" -V, --version output version information and exit\n"
@ -78,7 +79,7 @@ void show_help()
" -i, --ignore-case ignore case differences in file contents\n"
" -M, --format=<list> process only the formats in <list>\n"
" -N, --no-rcfile don't read runtime configuration file\n"
" -O, --force-format=[<f1>][,<f2>] force given formats (bz2, gz, lz, xz)\n"
" -O, --force-format=[<f1>][,<f2>] force the formats given (bz2, gz, lz, xz)\n"
" -p, --show-c-function show which C function each change is in\n"
" -q, --brief output only whether files differ\n"
" -s, --report-identical-files report when two files are identical\n"
@ -87,6 +88,8 @@ void show_help()
" -u use the unified output format\n"
" -U, --unified=<n> same as -u but use <n> lines of context\n"
" -w, --ignore-all-space ignore all white space\n"
" -W, --width=<n> output at most <n> print columns\n"
" -y, --side-by-side output in two columns\n"
" --bz2=<command> set compressor and options for bzip2 format\n"
" --gz=<command> set compressor and options for gzip format\n"
" --lz=<command> set compressor and options for lzip format\n"
@ -112,8 +115,8 @@ extern "C" void remove_fifos()
}
// Set fifonames[i] to "${TMPDIR}/<coded_pid>[_-]<basename(filenames[i])>"
// and create FIFOs.
/* Set fifonames[i] to "${TMPDIR}/<coded_pid>[_-]<basename(filenames[i])>"
and create FIFOs. */
bool set_fifonames( const std::string filenames[2] )
{
enum { num_codes = 36 };
@ -152,10 +155,10 @@ bool set_data_feeder( const std::string & filename,
const std::string & fifoname, const int infd,
Children & children, int format_index )
{
const uint8_t * magic_data = 0;
uint8_t magic_data[magic_buf_size];
int magic_size = 0;
if( format_index < 0 )
format_index = test_format( infd, &magic_data, &magic_size );
format_index = test_format( infd, magic_data, &magic_size );
children.compressor_name = get_compressor_name( format_index );
if( children.compressor_name ) // compressed
@ -264,8 +267,8 @@ int main( const int argc, const char * const argv[] )
enum { bz2_opt = 256, gz_opt, lz_opt, xz_opt };
std::vector< const char * > diff_args; // args to diff, maybe empty
int format_types[2] = { -1, -1 };
invocation_name = argv[0];
program_name = "zdiff";
invocation_name = ( argc > 0 ) ? argv[0] : program_name;
const Arg_parser::Option options[] =
{
@ -290,6 +293,8 @@ int main( const int argc, const char * const argv[] )
{ 'U', "unified", Arg_parser::yes },
{ 'V', "version", Arg_parser::no },
{ 'w', "ignore-all-space", Arg_parser::no },
{ 'W', "width", Arg_parser::yes },
{ 'y', "side-by-side", Arg_parser::no },
{ bz2_opt, "bz2", Arg_parser::yes },
{ gz_opt, "gz", Arg_parser::yes },
{ lz_opt, "lz", Arg_parser::yes },
@ -333,6 +338,9 @@ int main( const int argc, const char * const argv[] )
diff_args.push_back( arg.c_str() ); break;
case 'V': show_version(); return 0;
case 'w': diff_args.push_back( "-w" ); break;
case 'W': diff_args.push_back( "-W" );
diff_args.push_back( arg.c_str() ); break;
case 'y': diff_args.push_back( "-y" ); break;
case bz2_opt: parse_compressor( arg, fmt_bz2 ); break;
case gz_opt: parse_compressor( arg, fmt_gz ); break;
case lz_opt: parse_compressor( arg, fmt_lz ); break;
@ -361,25 +369,30 @@ int main( const int argc, const char * const argv[] )
STDIN_FILENO : open_instream( filenames[0] );
if( infd[0] < 0 ) return 2;
if( ( files == 1 && filenames[0] == "-" ) ||
( files == 2 && check_identical( filenames[0].c_str(),
filenames[1].c_str() ) ) )
return 0;
if( files == 2 )
{
if( check_identical( filenames[0].c_str(), filenames[1].c_str() ) )
return 0;
infd[1] = ( filenames[1] == "-" ) ?
STDIN_FILENO : open_instream( filenames[1] );
if( infd[1] < 0 ) return 2;
}
else
{
if( filenames[0] == "-" )
{ show_error( "Missing operand after '-'.", 0, true ); return 2; }
if( format_types[0] >= 0 || format_types[1] >= 0 )
{ show_error( "Two files must be given when format is specified.", 0, true );
return 2; }
filenames[1] = filenames[0];
infd[1] = open_other_instream( filenames[1] );
if( infd[1] < 0 ) { infd[1] = STDIN_FILENO; filenames[1] = "-"; }
if( infd[1] < 0 )
{
if( verbosity >= 0 )
std::fprintf( stderr, "%s: Can't find file to compare with '%s'.\n",
program_name, filenames[0].c_str() );
show_error( 0, 0, true ); return 2;
}
}
std::atexit( remove_fifos );