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Code Issues

b2sum: Support a BSD-style checksum and improve the --help message

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This commit is contained in:
Artem Chudinov 2015-10-30 21:42:01 +05:00
parent 918e39086b
commit 70acf250b9
1 changed files with 31 additions and 8 deletions
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39
b2sum/b2sum.c
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@ -20,6 +20,7 @@
#include <ctype.h>
#include <unistd.h>
#include <getopt.h>
#include <stdbool.h>
#include "blake2.h"
@ -231,9 +232,14 @@ typedef int ( *blake2fn )( FILE *, void * );
static void usage( char **argv, int errcode )
{
FILE *out = errcode ? stderr : stdout;
fprintf( out, "Usage: %s [-a HASH] [FILE]...\n", argv[0] );
fprintf( out, "\tHASH in blake2b blake2s blake2bp blake2sp\n" );
fprintf( out, "\tWith no FILE, or when FILE is -, read standard input.\n" );
fprintf( out, "Usage: %s [OPTION]... [FILE]...\n", argv[0] );
fprintf( out, "\n" );
fprintf( out, "With no FILE, or when FILE is -, read standard input.\n" );
fprintf( out, "\n" );
fprintf( out, " -a <hash> hash algorithm (blake2b is default): \n"
" [blake2b|blake2s|blake2bp|blake2sp]\n" );
fprintf( out, " --tag create a BSD-style checksum\n" );
fprintf( out, " --help display this help and exit\n" );
exit( errcode );
}
@ -243,6 +249,7 @@ int main( int argc, char **argv )
blake2fn blake2_stream = blake2b_stream;
size_t outlen = BLAKE2B_OUTBYTES;
unsigned char hash[BLAKE2B_OUTBYTES] = {0};
bool bsdstyle = false;
int c;
opterr = 1;
@ -252,16 +259,13 @@ int main( int argc, char **argv )
int option_index = 0;
static struct option long_options[] = {
{ "help", no_argument, 0, 0 },
{ "tag", no_argument, 0, 0 },
{ NULL, 0, NULL, 0 }
};
c = getopt_long( argc, argv, "a:", long_options, &option_index );
if( c == -1 ) break;
switch( c )
{
case 0:
if( 0 == strcmp( "help", long_options[option_index].name ) )
usage( argv, 0 );
break;
case 'a':
if( 0 == strcmp( optarg, "blake2b" ) )
{
@ -291,6 +295,13 @@ int main( int argc, char **argv )
break;
case 0:
if( 0 == strcmp( "help", long_options[option_index].name ) )
usage( argv, 0 );
else if( 0 == strcmp( "tag", long_options[option_index].name ) )
bsdstyle = true;
break;
case '?':
usage( argv, 1 );
break;
@ -320,10 +331,22 @@ int main( int argc, char **argv )
goto end1;
}
if( bsdstyle )
{
if( blake2_stream == blake2b_stream ) printf( "BLAKE2b" );
else if( blake2_stream == blake2bp_stream ) printf( "BLAKE2bp" );
else if( blake2_stream == blake2s_stream ) printf( "BLAKE2s" );
else if( blake2_stream == blake2sp_stream ) printf( "BLAKE2sp" );
printf( " (%s) = ", argv[i] );
}
for( int j = 0; j < outlen; ++j )
printf( "%02x", hash[j] );
printf( " %s\n", argv[i] );
if( bsdstyle )
printf( "\n" );
else
printf( " %s\n", argv[i] );
end1:
if( f != stdin ) fclose( f );
end0: ;