/*

* Copyright (c) 1998-2001 Apple Computer, Inc. All rights reserved.

*

* @APPLE_LICENSE_HEADER_START@

*

* The contents of this file constitute Original Code as defined in and

* are subject to the Apple Public Source License Version 2.0 (the

* "License"). You may not use this file except in compliance with the

* License. Please obtain a copy of the License at

* http://www.opensource.apple.com/apsl/ and read it before using this file.

*

* This Original Code and all software distributed under the License are

* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER

* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,

* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,

* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the

* License for the specific language governing rights and limitations

* under the License.

*

* @APPLE_LICENSE_HEADER_END@

*

* File: fsx.c

* Author: Avadis Tevanian, Jr.

*

* File system exerciser.

*

* Rewrite and enhancements 1998-2001 Conrad Minshall -- conrad@mac.com

*

* Various features from Joe Sokol, Pat Dirks, and Clark Warner.

*

* Small changes to work under Linux -- davej@suse.de

*

* Sundry porting patches from Guy Harris 12/2001

*

* Checks for mmap last-page zero fill.

*

* Updated license to APSL 2.0, 2004/7/27 - Jordan Hubbard

*

* $FreeBSD: src/tools/regression/fsx/fsx.c,v 1.6 2008/02/19 07:09:18 ru Exp $

*

*/

#include <sys/types.h>

#include <sys/stat.h>

#ifdef _UWIN

# include <sys/param.h>

# include <limits.h>

# include <time.h>

# include <strings.h>

#endif

#include <fcntl.h>

#include <sys/mman.h>

#ifndef MAP_FILE

# define MAP_FILE 0

#endif

#include <limits.h>

#include <signal.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#include <stdarg.h>

#include <errno.h>

#define NUMPRINTCOLUMNS 32 /* # columns of data to print on each line */

/*

* A log entry is an operation and a bunch of arguments.

*/

struct log_entry {

int operation;

int args[3];

};

#define LOGSIZE 1000

struct log_entry oplog[LOGSIZE]; /* the log */

int logptr = 0; /* current position in log */

int logcount = 0; /* total ops */

/*

* Define operations

*/

#define OP_READ 1

#define OP_WRITE 2

#define OP_TRUNCATE 3

#define OP_CLOSEOPEN 4

#define OP_MAPREAD 5

#define OP_MAPWRITE 6

#define OP_SKIPPED 7

int page_size;

int page_mask;

char *original_buf; /* a pointer to the original data */

char *good_buf; /* a pointer to the correct data */

char *temp_buf; /* a pointer to the current data */

char *fname; /* name of our test file */

int fd; /* fd for our test file */

off_t file_size = 0;

off_t biggest = 0;

char state[256];

unsigned long testcalls = 0; /* calls to function "test" */

unsigned long simulatedopcount = 0; /* -b flag */

int closeprob = 0; /* -c flag */

int debug = 0; /* -d flag */

unsigned long debugstart = 0; /* -D flag */

unsigned long maxfilelen = 256 * 1024; /* -l flag */

int sizechecks = 1; /* -n flag disables them */

int maxoplen = 64 * 1024; /* -o flag */

int quiet = 0; /* -q flag */

unsigned long progressinterval = 0; /* -p flag */

int readbdy = 1; /* -r flag */

int style = 0; /* -s flag */

int truncbdy = 1; /* -t flag */

int writebdy = 1; /* -w flag */

long monitorstart = -1; /* -m flag */

long monitorend = -1; /* -m flag */

int lite = 0; /* -L flag */

long numops = -1; /* -N flag */

int randomoplen = 1; /* -O flag disables it */

int seed = 1; /* -S flag */

int mapped_writes = 1; /* -W flag disables */

int mapped_reads = 1; /* -R flag disables it */

int fsxgoodfd = 0;

FILE * fsxlogf = NULL;

int badoff = -1;

int closeopen = 0;

void

vwarnc(code, fmt, ap)

int code;

const char *fmt;

va_list ap;

{

fprintf(stderr, "fsx: ");

if (fmt != NULL) {

vfprintf(stderr, fmt, ap);

fprintf(stderr, ": ");

}

fprintf(stderr, "%s\n", strerror(code));

}

void

warn(const char * fmt, ...)

{

va_list ap;

va_start(ap, fmt);

vwarnc(errno, fmt, ap);

va_end(ap);

}

void

prt(char *fmt, ...)

{

va_list args;

va_start(args, fmt);

vfprintf(stdout, fmt, args);

va_end(args);

if (fsxlogf) {

va_start(args, fmt);

vfprintf(fsxlogf, fmt, args);

va_end(args);

}

}

void

prterr(char *prefix)

{

prt("%s%s%s\n", prefix, prefix ? ": " : "", strerror(errno));

}

void

log4(int operation, int arg0, int arg1, int arg2)

{

struct log_entry *le;

le = &oplog[logptr];

le->operation = operation;

if (closeopen)

le->operation = ~ le->operation;

le->args[0] = arg0;

le->args[1] = arg1;

le->args[2] = arg2;

logptr++;

logcount++;

if (logptr >= LOGSIZE)

logptr = 0;

}

void

logdump(void)

{

int i, count, down;

struct log_entry *lp;

prt("LOG DUMP (%d total operations):\n", logcount);

if (logcount < LOGSIZE) {

i = 0;

count = logcount;

} else {

i = logptr;

count = LOGSIZE;

}

for ( ; count > 0; count--) {

int opnum;

opnum = i+1 + (logcount/LOGSIZE)*LOGSIZE;

prt("%d(%d mod 256): ", opnum, opnum%256);

lp = &oplog[i];

if ((closeopen = lp->operation < 0))

lp->operation = ~ lp->operation;

switch (lp->operation) {

case OP_MAPREAD:

prt("MAPREAD\t0x%x thru 0x%x\t(0x%x bytes)",

lp->args[0], lp->args[0] + lp->args[1] - 1,

lp->args[1]);

if (badoff >= lp->args[0] && badoff <

lp->args[0] + lp->args[1])

prt("\t***RRRR***");

break;

case OP_MAPWRITE:

prt("MAPWRITE 0x%x thru 0x%x\t(0x%x bytes)",

lp->args[0], lp->args[0] + lp->args[1] - 1,

lp->args[1]);

if (badoff >= lp->args[0] && badoff <

lp->args[0] + lp->args[1])

prt("\t******WWWW");

break;

case OP_READ:

prt("READ\t0x%x thru 0x%x\t(0x%x bytes)",

lp->args[0], lp->args[0] + lp->args[1] - 1,

lp->args[1]);

if (badoff >= lp->args[0] &&

badoff < lp->args[0] + lp->args[1])

prt("\t***RRRR***");

break;

case OP_WRITE:

prt("WRITE\t0x%x thru 0x%x\t(0x%x bytes)",

lp->args[0], lp->args[0] + lp->args[1] - 1,

lp->args[1]);

if (lp->args[0] > lp->args[2])

prt(" HOLE");

else if (lp->args[0] + lp->args[1] > lp->args[2])

prt(" EXTEND");

if ((badoff >= lp->args[0] || badoff >=lp->args[2]) &&

badoff < lp->args[0] + lp->args[1])

prt("\t***WWWW");

break;

case OP_TRUNCATE:

down = lp->args[0] < lp->args[1];

prt("TRUNCATE %s\tfrom 0x%x to 0x%x",

down ? "DOWN" : "UP", lp->args[1], lp->args[0]);

if (badoff >= lp->args[!down] &&

badoff < lp->args[!!down])

prt("\t******WWWW");

break;

case OP_SKIPPED:

prt("SKIPPED (no operation)");

break;

default:

prt("BOGUS LOG ENTRY (operation code = %d)!",

lp->operation);

}

if (closeopen)

prt("\n\t\tCLOSE/OPEN");

prt("\n");

i++;

if (i == LOGSIZE)

i = 0;

}

}

void

save_buffer(char *buffer, off_t bufferlength, int fd)

{

off_t ret;

ssize_t byteswritten;

if (fd <= 0 || bufferlength == 0)

return;

if (bufferlength > SSIZE_MAX) {

prt("fsx flaw: overflow in save_buffer\n");

exit(67);

}

if (lite) {

off_t size_by_seek = lseek(fd, (off_t)0, SEEK_END);

if (size_by_seek == (off_t)-1)

prterr("save_buffer: lseek eof");

else if (bufferlength > size_by_seek) {

warn("save_buffer: .fsxgood file too short... will save 0x%llx bytes instead of 0x%llx\n", (unsigned long long)size_by_seek,

(unsigned long long)bufferlength);

bufferlength = size_by_seek;

}

}

ret = lseek(fd, (off_t)0, SEEK_SET);

if (ret == (off_t)-1)

prterr("save_buffer: lseek 0");

byteswritten = write(fd, buffer, (size_t)bufferlength);

if (byteswritten != bufferlength) {

if (byteswritten == -1)

prterr("save_buffer write");

else

warn("save_buffer: short write, 0x%x bytes instead of 0x%llx\n",

(unsigned)byteswritten,

(unsigned long long)bufferlength);

}

}

void

report_failure(int status)

{

logdump();

if (fsxgoodfd) {

if (good_buf) {

save_buffer(good_buf, file_size, fsxgoodfd);

prt("Correct content saved for comparison\n");

prt("(maybe hexdump \"%s\" vs \"%s.fsxgood\")\n",

fname, fname);

}

close(fsxgoodfd);

}

exit(status);

}

#define short_at(cp) ((unsigned short)((*((unsigned char *)(cp)) << 8) | \

*(((unsigned char *)(cp)) + 1)))

void

check_buffers(unsigned offset, unsigned size)

{

unsigned char c, t;

unsigned i = 0;

unsigned n = 0;

unsigned op = 0;

unsigned bad = 0;

if (memcmp(good_buf + offset, temp_buf, size) != 0) {

prt("READ BAD DATA: offset = 0x%x, size = 0x%x\n",

offset, size);

prt("OFFSET\tGOOD\tBAD\tRANGE\n");

while (size > 0) {

c = good_buf[offset];

t = temp_buf[i];

if (c != t) {

if (n == 0) {

bad = short_at(&temp_buf[i]);

prt("0x%5x\t0x%04x\t0x%04x", offset,

short_at(&good_buf[offset]), bad);

op = temp_buf[offset & 1 ? i+1 : i];

}

n++;

badoff = offset;

}

offset++;

i++;

size--;

}

if (n) {

prt("\t0x%5x\n", n);

if (bad)

prt("operation# (mod 256) for the bad data may be %u\n", ((unsigned)op & 0xff));

else

prt("operation# (mod 256) for the bad data unknown, check HOLE and EXTEND ops\n");

} else

prt("????????????????\n");

report_failure(110);

}

}

void

check_size(void)

{

struct stat statbuf;

off_t size_by_seek;

if (fstat(fd, &statbuf)) {

prterr("check_size: fstat");

statbuf.st_size = -1;

}

size_by_seek = lseek(fd, (off_t)0, SEEK_END);

if (file_size != statbuf.st_size || file_size != size_by_seek) {

prt("Size error: expected 0x%llx stat 0x%llx seek 0x%llx\n",

(unsigned long long)file_size,

(unsigned long long)statbuf.st_size,

(unsigned long long)size_by_seek);

report_failure(120);

}

}

void

check_trunc_hack(void)

{

struct stat statbuf;

ftruncate(fd, (off_t)0);

ftruncate(fd, (off_t)100000);

fstat(fd, &statbuf);

if (statbuf.st_size != (off_t)100000) {

prt("no extend on truncate! not posix!\n");

exit(130);

}

ftruncate(fd, (off_t)0);

}

void

doread(unsigned offset, unsigned size)

{

off_t ret;

unsigned iret;

offset -= offset % readbdy;

if (size == 0) {

if (!quiet && testcalls > simulatedopcount)

prt("skipping zero size read\n");

log4(OP_SKIPPED, OP_READ, offset, size);

return;

}

if (size + offset > file_size) {

if (!quiet && testcalls > simulatedopcount)

prt("skipping seek/read past end of file\n");

log4(OP_SKIPPED, OP_READ, offset, size);

return;

}

log4(OP_READ, offset, size, 0);

if (testcalls <= simulatedopcount)

return;

if (!quiet && ((progressinterval &&

testcalls % progressinterval == 0) ||

(debug &&

(monitorstart == -1 ||

(offset + size > monitorstart &&

(monitorend == -1 || offset <= monitorend))))))

prt("%lu read\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,

offset, offset + size - 1, size);

ret = lseek(fd, (off_t)offset, SEEK_SET);

if (ret == (off_t)-1) {

prterr("doread: lseek");

report_failure(140);

}

iret = read(fd, temp_buf, size);

if (iret != size) {

if (iret == -1)

prterr("doread: read");

else

prt("short read: 0x%x bytes instead of 0x%x\n",

iret, size);

report_failure(141);

}

check_buffers(offset, size);

}

typedef long uintptr_t;

void

check_eofpage(char *s, unsigned offset, char *p, int size)

{

uintptr_t last_page, should_be_zero;

if (offset + size <= (file_size & ~page_mask))

return;

/*

* we landed in the last page of the file

* test to make sure the VM system provided 0's

* beyond the true end of the file mapping

* (as required by mmap def in 1996 posix 1003.1)

*/

last_page = ((uintptr_t)p + (offset & page_mask) + size) & ~page_mask;

for (should_be_zero = last_page + (file_size & page_mask);

should_be_zero < last_page + page_size;

should_be_zero++)

if (*(char *)should_be_zero) {

prt("Mapped %s: non-zero data past EOF (0x%llx) page offset 0x%x is 0x%04x\n",

s, file_size - 1, should_be_zero & page_mask,

short_at(should_be_zero));

report_failure(205);

}

}

void

domapread(unsigned offset, unsigned size)

{

unsigned pg_offset;

unsigned map_size;

char *p;

offset -= offset % readbdy;

if (size == 0) {

if (!quiet && testcalls > simulatedopcount)

prt("skipping zero size read\n");

log4(OP_SKIPPED, OP_MAPREAD, offset, size);

return;

}

if (size + offset > file_size) {

if (!quiet && testcalls > simulatedopcount)

prt("skipping seek/read past end of file\n");

log4(OP_SKIPPED, OP_MAPREAD, offset, size);

return;

}

log4(OP_MAPREAD, offset, size, 0);

if (testcalls <= simulatedopcount)

return;

if (!quiet && ((progressinterval &&

testcalls % progressinterval == 0) ||

(debug &&

(monitorstart == -1 ||

(offset + size > monitorstart &&

(monitorend == -1 || offset <= monitorend))))))

prt("%lu mapread\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,

offset, offset + size - 1, size);

pg_offset = offset & page_mask;

map_size = pg_offset + size;

if ((p = (char *)mmap(0, map_size, PROT_READ, MAP_FILE | MAP_SHARED, fd,

(off_t)(offset - pg_offset))) == (char *)-1) {

prterr("domapread: mmap");

report_failure(190);

}

memcpy(temp_buf, p + pg_offset, size);

check_eofpage("Read", offset, p, size);

if (munmap(p, map_size) != 0) {

prterr("domapread: munmap");

report_failure(191);

}

check_buffers(offset, size);

}

void

gendata(char *original_buf, char *good_buf, unsigned offset, unsigned size)

{

while (size--) {

good_buf[offset] = testcalls % 256;

if (offset % 2)

good_buf[offset] += original_buf[offset];

offset++;

}

}

void

dowrite(unsigned offset, unsigned size)

{

off_t ret;

unsigned iret;

offset -= offset % writebdy;

if (size == 0) {

if (!quiet && testcalls > simulatedopcount)

prt("skipping zero size write\n");

log4(OP_SKIPPED, OP_WRITE, offset, size);

return;

}

log4(OP_WRITE, offset, size, file_size);

gendata(original_buf, good_buf, offset, size);

if (file_size < offset + size) {

if (file_size < offset)

memset(good_buf + file_size, '\0', offset - file_size);

file_size = offset + size;

if (lite) {

warn("Lite file size bug in fsx!");

report_failure(149);

}

}

if (testcalls <= simulatedopcount)

return;

if (!quiet && ((progressinterval &&

testcalls % progressinterval == 0) ||

(debug &&

(monitorstart == -1 ||

(offset + size > monitorstart &&

(monitorend == -1 || offset <= monitorend))))))

prt("%lu write\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,

offset, offset + size - 1, size);

ret = lseek(fd, (off_t)offset, SEEK_SET);

if (ret == (off_t)-1) {

prterr("dowrite: lseek");

report_failure(150);

}

iret = write(fd, good_buf + offset, size);

if (iret != size) {

if (iret == -1)

prterr("dowrite: write");

else

prt("short write: 0x%x bytes instead of 0x%x\n",

iret, size);

report_failure(151);

}

}

void

domapwrite(unsigned offset, unsigned size)

{

unsigned pg_offset;

unsigned map_size;

off_t cur_filesize;

char *p;

offset -= offset % writebdy;

if (size == 0) {

if (!quiet && testcalls > simulatedopcount)

prt("skipping zero size write\n");

log4(OP_SKIPPED, OP_MAPWRITE, offset, size);

return;

}

cur_filesize = file_size;

log4(OP_MAPWRITE, offset, size, 0);

gendata(original_buf, good_buf, offset, size);

if (file_size < offset + size) {

if (file_size < offset)

memset(good_buf + file_size, '\0', offset - file_size);

file_size = offset + size;

if (lite) {

warn("Lite file size bug in fsx!");

report_failure(200);

}

}

if (testcalls <= simulatedopcount)

return;

if (!quiet && ((progressinterval &&

testcalls % progressinterval == 0) ||

(debug &&

(monitorstart == -1 ||

(offset + size > monitorstart &&

(monitorend == -1 || offset <= monitorend))))))

prt("%lu mapwrite\t0x%x thru\t0x%x\t(0x%x bytes)\n", testcalls,

offset, offset + size - 1, size);

if (file_size > cur_filesize) {

if (ftruncate(fd, file_size) == -1) {

prterr("domapwrite: ftruncate");

exit(201);

}

}

pg_offset = offset & page_mask;

map_size = pg_offset + size;

if ((p = (char *)mmap(0, map_size, PROT_READ | PROT_WRITE,

MAP_FILE | MAP_SHARED, fd,

(off_t)(offset - pg_offset))) == (char *)-1) {

prterr("domapwrite: mmap");

report_failure(202);

}

memcpy(p + pg_offset, good_buf + offset, size);

if (msync(p, map_size, 0) != 0) {

prterr("domapwrite: msync");

report_failure(203);

}

check_eofpage("Write", offset, p, size);

if (munmap(p, map_size) != 0) {

prterr("domapwrite: munmap");

report_failure(204);

}

}

void

dotruncate(unsigned size)

{

int oldsize = file_size;

size -= size % truncbdy;

if (size > biggest) {

biggest = size;

if (!quiet && testcalls > simulatedopcount)

prt("truncating to largest ever: 0x%x\n", size);

}

log4(OP_TRUNCATE, size, (unsigned)file_size, 0);

if (size > file_size)

memset(good_buf + file_size, '\0', size - file_size);

file_size = size;

if (testcalls <= simulatedopcount)

return;

if ((progressinterval && testcalls % progressinterval == 0) ||

(debug && (monitorstart == -1 || monitorend == -1 ||

size <= monitorend)))

prt("%lu trunc\tfrom 0x%x to 0x%x\n", testcalls, oldsize, size);

if (ftruncate(fd, (off_t)size) == -1) {

prt("ftruncate1: %x\n", size);

prterr("dotruncate: ftruncate");

report_failure(160);

}

}

void

writefileimage()

{

ssize_t iret;

if (lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) {

prterr("writefileimage: lseek");

report_failure(171);

}

iret = write(fd, good_buf, file_size);

if ((off_t)iret != file_size) {

if (iret == -1)

prterr("writefileimage: write");

else

prt("short write: 0x%x bytes instead of 0x%llx\n",

iret, (unsigned long long)file_size);

report_failure(172);

}

if (lite ? 0 : ftruncate(fd, file_size) == -1) {

prt("ftruncate2: %llx\n", (unsigned long long)file_size);

prterr("writefileimage: ftruncate");

report_failure(173);

}

}

void

docloseopen(void)

{

if (testcalls <= simulatedopcount)

return;

if (debug)

prt("%lu close/open\n", testcalls);

if (close(fd)) {

prterr("docloseopen: close");

report_failure(180);

}

fd = open(fname, O_RDWR, 0);

if (fd < 0) {

prterr("docloseopen: open");

report_failure(181);

}

}

void

test(void)

{

unsigned long offset;

unsigned long size = maxoplen;

unsigned long rv = random();

unsigned long op = rv % (3 + !lite + mapped_writes);

/* turn off the map read if necessary */

if (op == 2 && !mapped_reads)

op = 0;

if (simulatedopcount > 0 && testcalls == simulatedopcount)

writefileimage();

testcalls++;

if (closeprob)

closeopen = (rv >> 3) < (1 << 28) / closeprob;

if (debugstart > 0 && testcalls >= debugstart)

debug = 1;

if (!quiet && testcalls < simulatedopcount && testcalls % 100000 == 0)

prt("%lu...\n", testcalls);

/*

* READ: op = 0

* WRITE: op = 1

* MAPREAD: op = 2

* TRUNCATE: op = 3

* MAPWRITE: op = 3 or 4

*/

if (lite ? 0 : op == 3 && style == 0) /* vanilla truncate? */

dotruncate(random() % maxfilelen);

else {

if (randomoplen)

size = random() % (maxoplen+1);

if (lite ? 0 : op == 3)

dotruncate(size);

else {

offset = random();

if (op == 1 || op == (lite ? 3 : 4)) {

offset %= maxfilelen;

if (offset + size > maxfilelen)

size = maxfilelen - offset;

if (op != 1)

domapwrite(offset, size);

else

dowrite(offset, size);

} else {

if (file_size)

offset %= file_size;

else

offset = 0;

if (offset + size > file_size)

size = file_size - offset;

if (op != 0)

domapread(offset, size);

else

doread(offset, size);

}

}

}

if (sizechecks && testcalls > simulatedopcount)

check_size();

if (closeopen)

docloseopen();

}

void

cleanup(sig)

int sig;

{

if (sig)

prt("signal %d\n", sig);

prt("testcalls = %lu\n", testcalls);

exit(sig);

}

void

usage(void)

{

fprintf(stdout, "usage: %s",

"fsx [-dnqLOW] [-b opnum] [-c Prob] [-l flen] [-m start:end] [-o oplen] [-p progressinterval] [-r readbdy] [-s style] [-t truncbdy] [-w writebdy] [-D startingop] [-N numops] [-P dirpath] [-S seed] fname\n\

-b opnum: beginning operation number (default 1)\n\

-c P: 1 in P chance of file close+open at each op (default infinity)\n\

-d: debug output for all operations\n\

-l flen: the upper bound on file size (default 262144)\n\

-m startop:endop: monitor (print debug output) specified byte range (default 0:infinity)\n\

-n: no verifications of file size\n\

-o oplen: the upper bound on operation size (default 65536)\n\

-p progressinterval: debug output at specified operation interval\n\

-q: quieter operation\n\

-r readbdy: 4096 would make reads page aligned (default 1)\n\

-s style: 1 gives smaller truncates (default 0)\n\

-t truncbdy: 4096 would make truncates page aligned (default 1)\n\

-w writebdy: 4096 would make writes page aligned (default 1)\n\

-D startingop: debug output starting at specified operation\n\

-L: fsxLite - no file creations & no file size changes\n\

-N numops: total # operations to do (default infinity)\n\

-O: use oplen (see -o flag) for every op (default random)\n\

-P dirpath: save .fsxlog and .fsxgood files in dirpath (default ./)\n\

-S seed: for random # generator (default 1) 0 gets timestamp\n\

-W: mapped write operations DISabled\n\

-R: mapped read operations DISabled)\n\

fname: this filename is REQUIRED (no default)\n");

exit(90);

}

int

getnum(char *s, char **e)

{

int ret = -1;

*e = (char *) 0;

ret = strtol(s, e, 0);

if (*e)

switch (**e) {

case 'b':

case 'B':

ret *= 512;

*e = *e + 1;

break;

case 'k':

case 'K':

ret *= 1024;

*e = *e + 1;

break;

case 'm':

case 'M':

ret *= 1024*1024;

*e = *e + 1;

break;

case 'w':

case 'W':

ret *= 4;

*e = *e + 1;

break;

}

return (ret);

}

int

main(int argc, char **argv)

{

int i, ch;

char *endp;

char goodfile[1024];

char logfile[1024];

goodfile[0] = 0;

logfile[0] = 0;

page_size = getpagesize();

page_mask = page_size - 1;

setvbuf(stdout, (char *)0, _IOLBF, 0); /* line buffered stdout */

while ((ch = getopt(argc, argv, "b:c:dl:m:no:p:qr:s:t:w:D:LN:OP:RS:W"))

!= -1)

switch (ch) {

case 'b':

simulatedopcount = getnum(optarg, &endp);

if (!quiet)

fprintf(stdout, "Will begin at operation %ld\n",

simulatedopcount);

if (simulatedopcount == 0)

usage();

simulatedopcount -= 1;

break;

case 'c':

closeprob = getnum(optarg, &endp);

if (!quiet)

fprintf(stdout,

"Chance of close/open is 1 in %d\n",

closeprob);

if (closeprob <= 0)

usage();

break;

case 'd':

debug = 1;

break;

case 'l':

maxfilelen = getnum(optarg, &endp);

if (maxfilelen <= 0)

usage();

break;

case 'm':

monitorstart = getnum(optarg, &endp);

if (monitorstart < 0)

usage();

if (!endp || *endp++ != ':')

usage();

monitorend = getnum(endp, &endp);

if (monitorend < 0)

usage();

if (monitorend == 0)

monitorend = -1; /* aka infinity */

debug = 1;

case 'n':

sizechecks = 0;

break;

case 'o':

maxoplen = getnum(optarg, &endp);

if (maxoplen <= 0)

usage();

break;

case 'p':

progressinterval = getnum(optarg, &endp);

if (progressinterval < 0)

usage();

break;

case 'q':

quiet = 1;