422 lines
12 KiB
C
422 lines
12 KiB
C
/*
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* Copyright (c) 1983, 1989, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1983, 1989, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)newfs.c 8.13 (Berkeley) 5/1/95";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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/*
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* newfs: friendly front end to mkfs
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*/
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/disk.h>
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#include <sys/disklabel.h>
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#include <sys/file.h>
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#include <sys/mount.h>
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#include <ufs/ufs/dir.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.h>
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#include <ufs/ufs/ufsmount.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <paths.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include <unistd.h>
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#include "newfs.h"
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/*
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* The following two constants set the default block and fragment sizes.
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* Both constants must be a power of 2 and meet the following constraints:
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* MINBSIZE <= DESBLKSIZE <= MAXBSIZE
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* sectorsize <= DESFRAGSIZE <= DESBLKSIZE
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* DESBLKSIZE / DESFRAGSIZE <= 8
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*/
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#define DFL_FRAGSIZE 2048
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#define DFL_BLKSIZE 16384
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/*
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* Cylinder groups may have up to many cylinders. The actual
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* number used depends upon how much information can be stored
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* on a single cylinder. The default is to use as many as possible
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* cylinders per group.
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*/
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#define DESCPG 65536 /* desired fs_cpg ("infinity") */
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/*
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* MAXBLKPG determines the maximum number of data blocks which are
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* placed in a single cylinder group. The default is one indirect
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* block worth of data blocks.
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*/
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#define MAXBLKPG(bsize) ((bsize) / sizeof(daddr_t))
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/*
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* Each filesystem has a number of inodes statically allocated.
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* We allocate one inode slot per NFPI fragments, expecting this
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* to be far more than we will ever need.
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*/
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#define NFPI 4
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/*
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* About the same time as the above, we knew what went where on the disks.
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* no longer so, so kill the code which finds the different platters too...
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* We do this by saying one head, with a lot of sectors on it.
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* The number of sectors are used to determine the size of a cyl-group.
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* Kirk suggested one or two meg per "cylinder" so we say two.
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*/
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#define NSECTORS 4096 /* number of sectors */
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int Nflag; /* run without writing filesystem */
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int Rflag; /* regression test */
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int Uflag; /* enable soft updates for filesystem */
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u_int fssize; /* filesystem size */
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u_int secpercyl = NSECTORS; /* sectors per cylinder */
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u_int sectorsize; /* bytes/sector */
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int realsectorsize; /* bytes/sector in hardware */
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int fsize = 0; /* fragment size */
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int bsize = 0; /* block size */
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int cpg = DESCPG; /* cylinders/cylinder group */
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int cpgflg; /* cylinders/cylinder group flag was given */
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int minfree = MINFREE; /* free space threshold */
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int opt = DEFAULTOPT; /* optimization preference (space or time) */
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int density; /* number of bytes per inode */
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int maxcontig = 0; /* max contiguous blocks to allocate */
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int maxbpg; /* maximum blocks per file in a cyl group */
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int avgfilesize = AVFILESIZ;/* expected average file size */
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int avgfilesperdir = AFPDIR;/* expected number of files per directory */
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int fso; /* filedescriptor to device */
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static char device[MAXPATHLEN];
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static char *disktype;
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static int t_or_u_flag; /* user has specified -t or -u */
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static int unlabeled;
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static struct disklabel *getdisklabel(char *s);
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static void rewritelabel(char *s, struct disklabel *lp);
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static void usage(void);
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int
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main(int argc, char *argv[])
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{
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struct partition *pp;
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struct disklabel *lp;
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struct partition oldpartition;
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struct stat st;
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char *cp, *special;
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int ch, n;
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off_t mediasize;
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while ((ch = getopt(argc, argv,
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"NRS:T:Ua:b:c:e:f:g:h:i:m:o:s:u:")) != -1)
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switch (ch) {
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case 'N':
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Nflag = 1;
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break;
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case 'R':
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Rflag = 1;
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break;
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case 'S':
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if ((sectorsize = atoi(optarg)) <= 0)
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errx(1, "%s: bad sector size", optarg);
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break;
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case 'T':
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disktype = optarg;
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break;
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case 'U':
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Uflag = 1;
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break;
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case 'a':
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if ((maxcontig = atoi(optarg)) <= 0)
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errx(1, "%s: bad maximum contiguous blocks",
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optarg);
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break;
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case 'b':
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if ((bsize = atoi(optarg)) < MINBSIZE)
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errx(1, "%s: bad block size", optarg);
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break;
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case 'c':
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if ((cpg = atoi(optarg)) <= 0)
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errx(1, "%s: bad cylinders/group", optarg);
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cpgflg++;
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break;
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case 'e':
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if ((maxbpg = atoi(optarg)) <= 0)
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errx(1, "%s: bad blocks per file in a cylinder group",
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optarg);
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break;
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case 'f':
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if ((fsize = atoi(optarg)) <= 0)
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errx(1, "%s: bad fragment size", optarg);
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break;
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case 'g':
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if ((avgfilesize = atoi(optarg)) <= 0)
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errx(1, "%s: bad average file size", optarg);
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break;
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case 'h':
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if ((avgfilesperdir = atoi(optarg)) <= 0)
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errx(1, "%s: bad average files per dir", optarg);
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break;
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case 'i':
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if ((density = atoi(optarg)) <= 0)
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errx(1, "%s: bad bytes per inode", optarg);
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break;
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case 'm':
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if ((minfree = atoi(optarg)) < 0 || minfree > 99)
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errx(1, "%s: bad free space %%", optarg);
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break;
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case 'o':
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if (strcmp(optarg, "space") == 0)
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opt = FS_OPTSPACE;
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else if (strcmp(optarg, "time") == 0)
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opt = FS_OPTTIME;
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else
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errx(1,
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"%s: unknown optimization preference: use `space' or `time'",
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optarg);
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break;
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case 's':
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if ((fssize = atoi(optarg)) <= 0)
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errx(1, "%s: bad filesystem size", optarg);
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break;
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case 'u':
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t_or_u_flag++;
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if ((n = atoi(optarg)) < 0)
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errx(1, "%s: bad sectors/track", optarg);
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secpercyl = n;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc != 1)
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usage();
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special = argv[0];
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cp = strrchr(special, '/');
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if (cp == 0) {
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/*
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* No path prefix; try prefixing _PATH_DEV.
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*/
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snprintf(device, sizeof(device), "%s%s", _PATH_DEV, special);
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special = device;
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}
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fso = open(special, Nflag ? O_RDONLY : O_RDWR);
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if (fso < 0)
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err(1, "%s", special);
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if (fstat(fso, &st) < 0)
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err(1, "%s", special);
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if ((st.st_mode & S_IFMT) != S_IFCHR)
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errx(1, "%s: not a character-special device", special);
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if (sectorsize == 0)
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ioctl(fso, DIOCGSECTORSIZE, §orsize);
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if (sectorsize && !ioctl(fso, DIOCGMEDIASIZE, &mediasize)) {
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if (fssize == 0)
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fssize = mediasize / sectorsize;
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else if (fssize > mediasize / sectorsize)
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errx(1, "%s: maximum filesystem size is %u",
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special, (u_int)(mediasize / sectorsize));
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}
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pp = NULL;
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lp = getdisklabel(special);
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if (lp != NULL) {
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cp = strchr(special, '\0');
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cp--;
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if ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))
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errx(1, "%s: can't figure out filesystem partition",
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special);
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if (isdigit(*cp))
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pp = &lp->d_partitions[RAW_PART];
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else
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pp = &lp->d_partitions[*cp - 'a'];
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oldpartition = *pp;
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if (pp->p_size == 0)
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errx(1, "%s: `%c' partition is unavailable",
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special, *cp);
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if (pp->p_fstype == FS_BOOT)
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errx(1, "%s: `%c' partition overlaps boot program",
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special, *cp);
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if (fssize == 0)
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fssize = pp->p_size;
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if (fssize > pp->p_size)
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errx(1,
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"%s: maximum filesystem size %d", special, pp->p_size);
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if (secpercyl == 0)
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secpercyl = lp->d_nsectors;
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if (sectorsize == 0)
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sectorsize = lp->d_secsize;
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if (fsize == 0)
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fsize = pp->p_fsize;
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if (bsize == 0)
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bsize = pp->p_frag * pp->p_fsize;
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}
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if (sectorsize <= 0)
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errx(1, "%s: no default sector size", special);
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if (fsize <= 0)
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fsize = MAX(DFL_FRAGSIZE, sectorsize);
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if (bsize <= 0)
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bsize = MIN(DFL_BLKSIZE, 8 * fsize);
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if (secpercyl <= 0)
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errx(1, "%s: no default #sectors/track", special);
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/*
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* Maxcontig sets the default for the maximum number of blocks
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* that may be allocated sequentially. With filesystem clustering
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* it is possible to allocate contiguous blocks up to the maximum
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* transfer size permitted by the controller or buffering.
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*/
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if (maxcontig == 0)
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maxcontig = MAX(1, MAXPHYS / bsize - 1);
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if (density == 0)
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density = NFPI * fsize;
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if (minfree < MINFREE && opt != FS_OPTSPACE) {
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fprintf(stderr, "Warning: changing optimization to space ");
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fprintf(stderr, "because minfree is less than %d%%\n", MINFREE);
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opt = FS_OPTSPACE;
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}
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/*
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* Only complain if -t or -u have been specified; the default
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* case (4096 sectors per cylinder) is intended to disagree
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* with the disklabel.
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*/
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if (t_or_u_flag && lp != NULL && secpercyl != lp->d_secpercyl)
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fprintf(stderr, "%s (%d) %s (%lu)\n",
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"Warning: calculated sectors per cylinder", secpercyl,
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"disagrees with disk label", (u_long)lp->d_secpercyl);
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if (maxbpg == 0)
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maxbpg = MAXBLKPG(bsize);
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realsectorsize = sectorsize;
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if (sectorsize != DEV_BSIZE) { /* XXX */
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int secperblk = sectorsize / DEV_BSIZE;
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sectorsize = DEV_BSIZE;
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secpercyl *= secperblk;
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fssize *= secperblk;
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if (pp != NULL);
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pp->p_size *= secperblk;
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}
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mkfs(pp, special);
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if (!unlabeled) {
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if (realsectorsize != DEV_BSIZE)
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pp->p_size /= realsectorsize /DEV_BSIZE;
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if (!Nflag && bcmp(pp, &oldpartition, sizeof(oldpartition)))
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rewritelabel(special, lp);
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}
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close(fso);
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exit(0);
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}
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const char lmsg[] = "%s: can't read disk label; disk type must be specified";
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struct disklabel *
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getdisklabel(char *s)
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{
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static struct disklabel lab;
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struct disklabel *lp;
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if (!ioctl(fso, DIOCGDINFO, (char *)&lab))
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return (&lab);
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unlabeled++;
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if (disktype) {
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lp = getdiskbyname(disktype);
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if (lp != NULL)
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return (lp);
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}
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return (NULL);
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}
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void
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rewritelabel(char *s, struct disklabel *lp)
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{
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if (unlabeled)
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return;
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lp->d_checksum = 0;
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lp->d_checksum = dkcksum(lp);
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if (ioctl(fso, DIOCWDINFO, (char *)lp) < 0) {
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warn("ioctl (WDINFO)");
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errx(1, "%s: can't rewrite disk label", s);
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}
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}
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static void
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usage()
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{
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fprintf(stderr,
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"usage: %s [ -fsoptions ] special-device%s\n",
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getprogname(),
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" [device-type]");
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fprintf(stderr, "where fsoptions are:\n");
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fprintf(stderr,
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"\t-N do not create filesystem, just print out parameters\n");
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fprintf(stderr, "\t-R regression test, supress random factors\n");
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fprintf(stderr, "\t-S sector size\n");
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fprintf(stderr, "\t-T disktype\n");
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fprintf(stderr, "\t-U enable soft updates\n");
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fprintf(stderr, "\t-a maximum contiguous blocks\n");
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fprintf(stderr, "\t-b block size\n");
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fprintf(stderr, "\t-c cylinders/group\n");
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fprintf(stderr, "\t-e maximum blocks per file in a cylinder group\n");
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fprintf(stderr, "\t-f frag size\n");
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fprintf(stderr, "\t-g average file size\n");
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fprintf(stderr, "\t-h average files per directory\n");
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fprintf(stderr, "\t-i number of bytes per inode\n");
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fprintf(stderr, "\t-m minimum free space %%\n");
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fprintf(stderr, "\t-o optimization preference (`space' or `time')\n");
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fprintf(stderr, "\t-s filesystem size (sectors)\n");
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fprintf(stderr, "\t-u sectors/cylinder\n");
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fprintf(stderr,
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"\t-v do not attempt to determine partition name from device name\n");
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exit(1);
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}
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