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-rw-r--r--main.c213
1 files changed, 123 insertions, 90 deletions
diff --git a/main.c b/main.c
index 8737fed..47a72d6 100644
--- a/main.c
+++ b/main.c
@@ -1,5 +1,5 @@
/* Lunzip - Decompressor for the lzip format
- Copyright (C) 2010-2016 Antonio Diaz Diaz.
+ Copyright (C) 2010-2017 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
@@ -67,14 +67,16 @@ int verbosity = 0;
const char * const Program_name = "Lunzip";
const char * const program_name = "lunzip";
-const char * const program_year = "2016";
+const char * const program_year = "2017";
const char * invocation_name = 0;
-struct { const char * from; const char * to; } const known_extensions[] = {
+const struct { const char * from; const char * to; } known_extensions[] = {
{ ".lz", "" },
{ ".tlz", ".tar" },
{ 0, 0 } };
+enum Mode { m_compress, m_decompress, m_list, m_test };
+
char * output_filename = 0;
int outfd = -1;
bool delete_output_on_interrupt = false;
@@ -105,6 +107,7 @@ static void show_help( void )
" -d, --decompress decompress (this is the default)\n"
" -f, --force overwrite existing output files\n"
" -k, --keep keep (don't delete) input files\n"
+ " -l, --list print (un)compressed file sizes\n"
" -o, --output=<file> if reading standard input, write to <file>\n"
" -q, --quiet suppress all messages\n"
" -t, --test test compressed file integrity\n"
@@ -114,6 +117,8 @@ static void show_help( void )
"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"
+ "Buffer sizes 12 to 29 are interpreted as powers of two, meaning 2^12\n"
+ "to 2^29 bytes.\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 (eg, bug) which\n"
@@ -133,23 +138,38 @@ static void show_version( void )
}
+const char * bad_version( const unsigned version )
+ {
+ static char buf[80];
+ snprintf( buf, sizeof buf, "Version %u member format not supported.",
+ version );
+ return buf;
+ }
+
+
+const char * format_ds( const unsigned dictionary_size )
+ {
+ enum { bufsize = 16, factor = 1024 };
+ static char buf[bufsize];
+ const char * const prefix[8] =
+ { "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi", "Yi" };
+ const char * p = "";
+ const char * np = " ";
+ unsigned num = dictionary_size, i;
+ bool exact = ( num % factor == 0 );
+
+ for( i = 0; i < 8 && ( num > 9999 || ( exact && num >= factor ) ); ++i )
+ { num /= factor; if( num % factor != 0 ) exact = false;
+ p = prefix[i]; np = ""; }
+ snprintf( buf, bufsize, "%s%4u %sB", np, num, p );
+ return buf;
+ }
+
+
static void show_header( const unsigned dictionary_size )
{
if( verbosity >= 3 )
- {
- const char * const prefix[8] =
- { "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi", "Yi" };
- enum { factor = 1024 };
- const char * p = "";
- const char * np = " ";
- unsigned num = dictionary_size, i;
- bool exact = ( num % factor == 0 );
-
- 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, "dictionary size %s%4u %sB. ", np, num, p );
- }
+ fprintf( stderr, "dictionary %s. ", format_ds( dictionary_size ) );
}
@@ -169,7 +189,7 @@ static unsigned long getnum( const char * const ptr,
if( !errno && tail[0] )
{
- const int factor = ( tail[1] == 'i' ) ? 1024 : 1000;
+ const unsigned factor = ( tail[1] == 'i' ) ? 1024 : 1000;
int exponent = 0; /* 0 = bad multiplier */
int i;
switch( tail[0] )
@@ -208,7 +228,7 @@ static unsigned long getnum( const char * const ptr,
static int get_dict_size( const char * const arg )
{
char * tail;
- const int bits = strtol( arg, &tail, 0 );
+ const long bits = strtol( arg, &tail, 0 );
if( bits >= min_dictionary_bits &&
bits <= max_dictionary_bits && *tail == 0 )
return ( 1 << bits );
@@ -216,37 +236,44 @@ static int get_dict_size( const char * const arg )
}
+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 i;
- for( i = 0; known_extensions[i].from; ++i )
+ int eindex;
+ for( eindex = 0; known_extensions[eindex].from; ++eindex )
{
- const char * const ext = known_extensions[i].from;
+ 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 i;
+ return eindex;
}
return -1;
}
-static int open_instream( const char * const name, struct stat * const in_statsp,
- const bool no_ofile )
+int open_instream( const char * const name, struct stat * const in_statsp,
+ const bool no_ofile, const bool reg_only )
{
int infd = open( name, O_RDONLY | O_BINARY );
if( infd < 0 )
- {
- if( verbosity >= 0 )
- fprintf( stderr, "%s: Can't open input file '%s': %s\n",
- program_name, name, strerror( errno ) );
- }
+ 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 &&
+ const bool can_read = ( i == 0 && !reg_only &&
( S_ISBLK( mode ) || S_ISCHR( mode ) ||
S_ISFIFO( mode ) || S_ISSOCK( mode ) ) );
if( i != 0 || ( !S_ISREG( mode ) && ( !can_read || !no_ofile ) ) )
@@ -265,7 +292,7 @@ static int open_instream( const char * const name, struct stat * const in_statsp
/* assure at least a minimum size for buffer 'buf' */
-static void * resize_buffer( void * buf, const int min_size )
+void * resize_buffer( void * buf, const unsigned min_size )
{
if( buf ) buf = realloc( buf, min_size );
else buf = malloc( min_size );
@@ -278,19 +305,19 @@ static void * resize_buffer( void * buf, const int min_size )
}
-static void set_d_outname( const char * const name, const int i )
+static void set_d_outname( const char * const name, const int eindex )
{
const unsigned name_len = strlen( name );
- if( i >= 0 )
+ if( eindex >= 0 )
{
- const char * const from = known_extensions[i].from;
+ 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[0].to ) + 1 );
+ strlen( known_extensions[eindex].to ) + 1 );
strcpy( output_filename, name );
- strcpy( output_filename + name_len - from_len, known_extensions[i].to );
+ strcpy( output_filename + name_len - from_len, known_extensions[eindex].to );
return;
}
}
@@ -376,10 +403,10 @@ static void close_and_set_permissions( const struct stat * const in_statsp )
}
-static unsigned char xdigit( const int value )
+static unsigned char xdigit( const unsigned value )
{
- if( value >= 0 && value <= 9 ) return '0' + value;
- if( value >= 10 && value <= 15 ) return 'A' + value - 10;
+ if( value <= 9 ) return '0' + value;
+ if( value <= 15 ) return 'A' + value - 10;
return 0;
}
@@ -392,35 +419,28 @@ static bool show_trailing_data( const uint8_t * const data, const int size,
{
int i;
char buf[80];
- int len = snprintf( buf, sizeof buf, "%strailing data = ",
- all ? "" : "first bytes of " );
- bool text = true;
- for( i = 0; i < size; ++i )
- if( !isprint( data[i] ) ) { text = false; break; }
- if( text )
+ unsigned len = max( 0, snprintf( buf, sizeof buf, "%strailing data = ",
+ all ? "" : "first bytes of " ) );
+ for( i = 0; i < size && len + 2 < sizeof buf; ++i )
{
- if( len > 0 && len < (int)sizeof buf )
- snprintf( buf + len, sizeof buf - len, "'%.*s'", size, (const char *)data );
- }
- else
- {
- for( i = 0; i < size && len > 0 && len + 3 < (int)sizeof buf; ++i )
- {
- if( i > 0 ) buf[len++] = ' ';
- buf[len++] = xdigit( data[i] >> 4 );
- buf[len++] = xdigit( data[i] & 0x0F );
- buf[len] = 0;
- }
+ buf[len++] = xdigit( data[i] >> 4 );
+ buf[len++] = xdigit( data[i] & 0x0F );
+ buf[len++] = ' ';
}
+ if( len < sizeof buf ) buf[len++] = '\'';
+ for( i = 0; i < size && len < sizeof buf; ++i )
+ { if( isprint( data[i] ) ) buf[len++] = data[i]; else buf[len++] = '.'; }
+ if( len < sizeof buf ) buf[len++] = '\'';
+ if( len < sizeof buf ) buf[len] = 0; else buf[sizeof buf - 1] = 0;
Pp_show_msg( pp, buf );
- if( !ignore_trailing ) show_error( "Trailing data not allowed.", 0, false );
+ if( !ignore_trailing ) show_file_error( pp->name, trailing_msg, 0 );
}
return ignore_trailing;
}
static int decompress( const int infd, struct Pretty_print * const pp,
- const int buffer_size,
+ const unsigned buffer_size,
const bool ignore_trailing, const bool testing )
{
unsigned long long partial_file_pos = 0;
@@ -454,25 +474,19 @@ static int decompress( const int infd, struct Pretty_print * const pp,
if( !Fh_verify_magic( header ) )
{
if( first_member )
- { Pp_show_msg( pp, "Bad magic number (file not in lzip format)." );
- retval = 2; }
+ { show_file_error( pp->name, bad_magic_msg, 0 ); retval = 2; }
else if( !show_trailing_data( header, size, pp, false, ignore_trailing ) )
retval = 2;
break;
}
if( !Fh_verify_version( header ) )
{
- if( verbosity >= 0 )
- { Pp_show_msg( pp, 0 );
- fprintf( stderr, "Version %d member format not supported.\n",
- Fh_version( header ) ); }
+ Pp_show_msg( pp, bad_version( Fh_version( header ) ) );
retval = 2; break;
}
dictionary_size = Fh_get_dictionary_size( header );
- if( dictionary_size < min_dictionary_size ||
- dictionary_size > max_dictionary_size )
- { Pp_show_msg( pp, "Invalid dictionary size in member header." );
- retval = 2; break; }
+ if( !isvalid_ds( dictionary_size ) )
+ { Pp_show_msg( pp, bad_dict_msg ); retval = 2; break; }
if( verbosity >= 2 || ( verbosity == 1 && first_member ) )
{ Pp_show_msg( pp, 0 ); show_header( dictionary_size ); }
@@ -536,6 +550,16 @@ void show_error( const char * const msg, const int errcode, const bool help )
}
+void show_file_error( const char * const filename, const char * const msg,
+ const int errcode )
+ {
+ if( verbosity < 0 ) return;
+ fprintf( stderr, "%s: %s: %s", program_name, filename, msg );
+ if( errcode > 0 ) fprintf( stderr, ": %s", strerror( errcode ) );
+ fputc( '\n', stderr );
+ }
+
+
void internal_error( const char * const msg )
{
if( verbosity >= 0 )
@@ -546,12 +570,12 @@ void internal_error( const char * const msg )
int main( const int argc, const char * const argv[] )
{
- const char * input_filename = "";
const char * default_output_filename = "";
const char ** filenames = 0;
int num_filenames = 0;
- int buffer_size = max_dictionary_size;
+ unsigned buffer_size = max_dictionary_size;
int infd = -1;
+ enum Mode program_mode = m_compress;
int argind = 0;
int retval = 0;
int i;
@@ -560,7 +584,6 @@ int main( const int argc, const char * const argv[] )
bool ignore_trailing = true;
bool keep_input_files = false;
bool stdin_used = false;
- bool testing = false;
bool to_stdout = false;
struct Pretty_print pp;
@@ -572,6 +595,7 @@ int main( const int argc, const char * const argv[] )
{ 'f', "force", ap_no },
{ 'h', "help", ap_no },
{ 'k', "keep", ap_no },
+ { 'l', "list", ap_no },
{ 'n', "threads", ap_yes },
{ 'o', "output", ap_yes },
{ 'q', "quiet", ap_no },
@@ -600,14 +624,15 @@ int main( const int argc, const char * const argv[] )
{
case 'a': ignore_trailing = false; break;
case 'c': to_stdout = true; break;
- case 'd': testing = false; break;
+ case 'd': set_mode( &program_mode, m_decompress ); break;
case 'f': force = true; break;
case 'h': show_help(); return 0;
case 'k': keep_input_files = true; break;
+ case 'l': set_mode( &program_mode, m_list ); break;
case 'n': break;
case 'o': default_output_filename = arg; break;
case 'q': verbosity = -1; break;
- case 't': testing = true; break;
+ case 't': set_mode( &program_mode, m_test ); break;
case 'u': buffer_size = get_dict_size( arg ); break;
case 'v': if( verbosity < 4 ) ++verbosity; break;
case 'V': show_version(); return 0;
@@ -620,9 +645,6 @@ int main( const int argc, const char * const argv[] )
setmode( STDOUT_FILENO, O_BINARY );
#endif
- if( testing )
- outfd = -1;
-
num_filenames = max( 1, ap_arguments( &parser ) - argind );
filenames = resize_buffer( filenames, num_filenames * sizeof filenames[0] );
filenames[0] = "-";
@@ -633,10 +655,18 @@ int main( const int argc, const char * const argv[] )
if( strcmp( filenames[i], "-" ) != 0 ) filenames_given = true;
}
+ if( program_mode == m_list )
+ return list_files( filenames, num_filenames, ignore_trailing );
+
+ if( program_mode == m_test )
+ outfd = -1;
+ else if( program_mode == m_compress )
+ program_mode = m_decompress; /* default mode */
+
if( buffer_size < max_dictionary_size )
{
bool from_stdin = false;
- if( to_stdout || testing )
+ if( to_stdout || program_mode == m_test )
{ show_error( "'--buffer-size' is incompatible with '--stdout' and '--test'.", 0, false );
return 1; }
for( i = 0; i < num_filenames; ++i )
@@ -647,7 +677,7 @@ int main( const int argc, const char * const argv[] )
" with a reduced buffer size.", 0, false ); return 1; }
}
- if( !to_stdout && !testing &&
+ if( !to_stdout && program_mode != m_test &&
( filenames_given || default_output_filename[0] ) )
set_signals();
@@ -656,6 +686,7 @@ int main( const int argc, const char * const argv[] )
output_filename = resize_buffer( output_filename, 1 );
for( i = 0; i < num_filenames; ++i )
{
+ const char * input_filename = "";
int tmp;
struct stat in_stats;
const struct stat * in_statsp;
@@ -664,16 +695,15 @@ int main( const int argc, const char * const argv[] )
if( !filenames[i][0] || strcmp( filenames[i], "-" ) == 0 )
{
if( stdin_used ) continue; else stdin_used = true;
- input_filename = "";
infd = STDIN_FILENO;
- if( !testing )
+ if( program_mode != m_test )
{
if( to_stdout || !default_output_filename[0] )
outfd = STDOUT_FILENO;
else
{
output_filename = resize_buffer( output_filename,
- strlen( default_output_filename ) + 1 );
+ strlen( default_output_filename ) + 1 );
strcpy( output_filename, default_output_filename );
if( !open_outstream( force, true ) )
{
@@ -687,9 +717,10 @@ int main( const int argc, const char * const argv[] )
else
{
input_filename = filenames[i];
- infd = open_instream( input_filename, &in_stats, to_stdout || testing );
+ infd = open_instream( input_filename, &in_stats,
+ to_stdout || program_mode == m_test, false );
if( infd < 0 ) { if( retval < 1 ) retval = 1; continue; }
- if( !testing )
+ if( program_mode != m_test )
{
if( to_stdout ) outfd = STDOUT_FILENO;
else
@@ -705,10 +736,13 @@ int main( const int argc, const char * const argv[] )
}
}
+ Pp_set_name( &pp, input_filename );
if( isatty( infd ) )
{
- show_error( "I won't read compressed data from a terminal.", 0, true );
+ show_file_error( pp.name,
+ "I won't read compressed data from a terminal.", 0 );
if( retval < 1 ) retval = 1;
+ if( program_mode == m_test ) { close( infd ); infd = -1; continue; }
cleanup_and_fail( retval );
}
@@ -727,17 +761,16 @@ int main( const int argc, const char * const argv[] )
}
in_statsp = input_filename[0] ? &in_stats : 0;
- Pp_set_name( &pp, input_filename );
- tmp = decompress( infd, &pp, buffer_size, ignore_trailing, testing );
+ tmp = decompress( infd, &pp, buffer_size, ignore_trailing, program_mode == m_test );
if( tmp > retval ) retval = tmp;
- if( tmp && !testing ) cleanup_and_fail( retval );
+ if( tmp && program_mode != m_test ) cleanup_and_fail( retval );
if( delete_output_on_interrupt )
close_and_set_permissions( in_statsp );
if( input_filename[0] )
{
close( infd ); infd = -1;
- if( !keep_input_files && !to_stdout && !testing )
+ if( !keep_input_files && !to_stdout && program_mode != m_test )
remove( input_filename );
}
}