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/* this is a very simple test tool for reading any file in an archive, just give the name as argument.
* This tool is not meant to be correct or a good example, it is pretty much only useful for debugging
* avfs.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <virtual.h>
#include <errno.h>
#include <string.h>
int main( int argc, char **argv )
{
int fd;
ssize_t len;
char buf[128*1024];
if ( argc < 2 ) {
return 0;
}
struct stat stat_buf;
if ( virt_stat( argv[1], &stat_buf ) != 0 ) {
printf( "Could not stat %s (%s)\n", argv[1], strerror( errno ) );
} else {
printf( "Size: %lu\n", stat_buf.st_size );
}
fd = virt_open( argv[1], O_RDONLY, 0 );
if ( fd >= 0 ) {
ssize_t total_len = 0;
for (;;) {
len = virt_read( fd, buf, sizeof( buf ) );
total_len += len;
printf( "Bytes read: %lu\n", len );
if ( len == 0 ) break;
else if ( len < 0 ) {
printf( "Error: %s\n", strerror( errno ) );
break;
}
}
printf( "Total len:%lu\n", total_len );
if ( total_len >= sizeof( buf ) ) {
for (;;) {
total_len -= sizeof( buf );
virt_lseek( fd, total_len, 0 );
len = virt_read( fd, buf, sizeof( buf ) );
printf( "Bytes read by seeking to %lu: %lu\n", total_len, len );
if ( total_len < sizeof( buf ) ) break;
}
}
virt_close( fd );
} else {
printf( "Could not open %s (%s)\n", argv[1], strerror( errno ) );
}
return 0;
}
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