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xfstests: randholes: document options a bit more

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Reformat the usage message and provide a little more
information about default values and units for options
for the "randholes" command.

Signed-off-by: Alex Elder <aelder@sgi.com>
Acked-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Alex Elder
2010-10-14 14:50:00 +00:00
parent b5b95753cc
commit 803750d475
1 changed files with 21 additions and 7 deletions
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src/randholes.c
+21 -7
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@@ -16,6 +16,8 @@
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <inttypes.h>
#include "global.h"
unsigned char *valid; /* Bit-vector array showing which blocks have been written */
@@ -23,7 +25,11 @@ int nvalid; /* number of bytes in valid array */
#define SETBIT(ARRAY, N) ((ARRAY)[(N)/8] |= (1 << ((N)%8)))
#define BITVAL(ARRAY, N) ((ARRAY)[(N)/8] & (1 << ((N)%8)))
#define DEFAULT_FILESIZE ((__uint64_t) (256 * 1024 * 1024))
#define DEFAULT_BLOCKSIZE 512
__uint64_t filesize;
unsigned int blocksize;
int count;
int verbose;
@@ -31,7 +37,7 @@ int wsync;
int direct;
int alloconly;
int rt;
int extsize;
int extsize; /* used only for real-time */
int preserve;
int test;
__uint64_t fileoffset;
@@ -50,10 +56,18 @@ void
usage(char *progname)
{
fprintf(stderr,
"usage: %s [-l filesize] [-b blocksize] [-c count]"
" [-o write offset] [-s seed] [-x extentsize]"
" [-w] [-v] [-d] [-r] [-a] [-p] filename\n",
"usage: %s [-l filesize] [-b blocksize] [-c count]\n"
"\t\t[-o write_offset] [-s seed] [-r [-x extentsize]]\n"
"\t\t[-w] [-v] [-d] [-a] [-p] [-t] filename\n\n",
progname);
fprintf(stderr, "\tdefault filesize is %" PRIu64 " bytes\n",
DEFAULT_FILESIZE);
fprintf(stderr, "\tdefault blocksize is %u bytes\n",
DEFAULT_BLOCKSIZE);
fprintf(stderr, "\tdefault count is %d block-sized writes\n",
(int) (DEFAULT_FILESIZE / DEFAULT_BLOCKSIZE));
fprintf(stderr, "\tdefault write_offset is %" PRIu64 " bytes\n",
(__uint64_t) 0);
exit(1);
}
@@ -64,9 +78,9 @@ main(int argc, char *argv[])
char *filename = NULL;
int r;
filesize = ((__uint64_t)256)*1024*1024;
blocksize = 512;
count = filesize/blocksize;
filesize = DEFAULT_FILESIZE;
blocksize = DEFAULT_BLOCKSIZE;
count = (int) filesize / blocksize;
verbose = 0;
wsync = 0;
seed = time(NULL);