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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include "file_common.h"
#include <libgen.h>
#include <string.h>
#include <inttypes.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <time.h>
#include <stdint.h>
static unsigned char bigbuffer[BIGBUFFERSIZE];
/*
* Writes (or appends) a given value to a file repeatedly.
* See header file for defaults.
*/
static void usage(char *);
/*
* pseudo-randomize the buffer
*/
static void randomize_buffer(int block_size) {
int i;
char rnd = rand() & 0xff;
for (i = 0; i < block_size; i++)
bigbuffer[i] ^= rnd;
}
int
main(int argc, char **argv)
{
int bigfd;
int c;
int oflag = 0;
int err = 0;
int k;
long i;
int64_t good_writes = 0;
uchar_t nxtfillchar;
char *prog = argv[0];
/*
* Default Parameters
*/
int write_count = BIGFILESIZE;
uchar_t fillchar = DATA;
int block_size = BLOCKSZ;
char *filename = NULL;
char *operation = NULL;
offset_t noffset, offset = 0;
int verbose = 0;
int rsync = 0;
int wsync = 0;
/*
* Process Arguments
*/
while ((c = getopt(argc, argv, "b:c:d:s:f:o:vwr")) != -1) {
switch (c) {
case 'b':
block_size = atoi(optarg);
break;
case 'c':
write_count = atoi(optarg);
break;
case 'd':
if (optarg[0] == 'R')
fillchar = 'R'; /* R = random data */
else
fillchar = atoi(optarg);
break;
case 's':
offset = atoll(optarg);
break;
case 'f':
filename = optarg;
break;
case 'o':
operation = optarg;
break;
case 'v':
verbose = 1;
break;
case 'w':
wsync = 1;
break;
case 'r':
rsync = 1;
break;
case '?':
(void) printf("unknown arg %c\n", optopt);
usage(prog);
break;
}
}
/*
* Validate Parameters
*/
if (!filename) {
(void) printf("Filename not specified (-f <file>)\n");
err++;
}
if (!operation) {
(void) printf("Operation not specified (-o <operation>).\n");
err++;
}
if (block_size > BIGBUFFERSIZE) {
(void) printf("block_size is too large max==%d.\n",
BIGBUFFERSIZE);
err++;
}
if (err) {
usage(prog); /* no return */
return (1);
}
/*
* Prepare the buffer and determine the requested operation
*/
nxtfillchar = fillchar;
k = 0;
if (fillchar == 'R')
srand(time(NULL));
for (i = 0; i < block_size; i++) {
bigbuffer[i] = nxtfillchar;
if (fillchar == 0) {
if ((k % DATA_RANGE) == 0) {
k = 0;
}
nxtfillchar = k++;
} else if (fillchar == 'R') {
nxtfillchar = rand() & 0xff;
}
}
/*
* using the strncmp of operation will make the operation match the
* first shortest match - as the operations are unique from the first
* character this means that we match single character operations
*/
if ((strncmp(operation, "create", strlen(operation) + 1)) == 0 ||
(strncmp(operation, "overwrite", strlen(operation) + 1)) == 0) {
oflag = (O_RDWR|O_CREAT);
} else if ((strncmp(operation, "append", strlen(operation) + 1)) == 0) {
oflag = (O_RDWR|O_APPEND);
} else {
(void) printf("valid operations are <create|append> not '%s'\n",
operation);
usage(prog);
}
if (rsync) {
oflag = oflag | O_RSYNC;
}
if (wsync) {
oflag = oflag | O_SYNC;
}
/*
* Given an operation (create/overwrite/append), open the file
* accordingly and perform a write of the appropriate type.
*/
if ((bigfd = open(filename, oflag, 0666)) == -1) {
(void) printf("open %s: failed [%s]%d. Aborting!\n", filename,
strerror(errno), errno);
exit(errno);
}
noffset = lseek64(bigfd, offset, SEEK_SET);
if (noffset != offset) {
(void) printf("llseek %s (%lld/%lld) failed [%s]%d.Aborting!\n",
filename, offset, noffset, strerror(errno), errno);
exit(errno);
}
if (verbose) {
(void) printf("%s: block_size = %d, write_count = %d, "
"offset = %lld, ", filename, block_size,
write_count, offset);
if (fillchar == 'R') {
(void) printf("data = [random]\n");
} else {
(void) printf("data = %s%d\n",
(fillchar == 0) ? "0->" : "",
(fillchar == 0) ? DATA_RANGE : fillchar);
}
}
for (i = 0; i < write_count; i++) {
ssize_t n;
if (fillchar == 'R')
randomize_buffer(block_size);
if ((n = write(bigfd, &bigbuffer, block_size)) == -1) {
(void) printf("write failed (%ld), good_writes = %"
PRId64 ", " "error: %s[%d]\n",
(long)n, good_writes,
strerror(errno),
errno);
exit(errno);
}
good_writes++;
}
if (verbose) {
(void) printf("Success: good_writes = %" PRId64 "(%"
PRId64 ")\n", good_writes, (good_writes * block_size));
}
return (0);
}
static void
usage(char *prog)
{
(void) printf("Usage: %s [-v] -o {create,overwrite,append} -f file_name"
" [-b block_size]\n"
"\t[-s offset] [-c write_count] [-d data]\n\n"
"Where [data] equal to zero causes chars "
"0->%d to be repeated throughout, or [data]\n"
"equal to 'R' for pseudorandom data.\n",
prog, DATA_RANGE);
exit(1);
}
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