826 lines
21 KiB
C
826 lines
21 KiB
C
/* $OpenBSD: newfs.c,v 1.118 2024/01/09 03:16:00 guenther Exp $ */
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/* $NetBSD: newfs.c,v 1.20 1996/05/16 07:13:03 thorpej Exp $ */
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/*
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* Copyright (c) 2002 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by Marshall
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* Kirk McKusick and Network Associates Laboratories, the Security
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* Research Division of Network Associates, Inc. under DARPA/SPAWAR
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* contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
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* research program.
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*
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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. 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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#include <sys/param.h> /* DEV_BSIZE MAXBSIZE */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/dkio.h>
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#include <sys/disklabel.h>
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#include <sys/mount.h>
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#include <sys/resource.h>
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#include <sys/sysctl.h>
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#include <sys/wait.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ufs/dir.h>
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#include <ufs/ffs/fs.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 <fcntl.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 <limits.h>
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#include <signal.h>
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#include <util.h>
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#include "mntopts.h"
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#include "pathnames.h"
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#define MINIMUM(a, b) (((a) < (b)) ? (a) : (b))
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#define MAXIMUM(a, b) (((a) > (b)) ? (a) : (b))
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struct mntopt mopts[] = {
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MOPT_STDOPTS,
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MOPT_WXALLOWED,
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MOPT_NOPERM,
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MOPT_ASYNC,
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MOPT_UPDATE,
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MOPT_FORCE,
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{ NULL },
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};
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void fatal(const char *fmt, ...)
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__attribute__((__format__ (printf, 1, 2)))
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__attribute__((__nonnull__ (1)));
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__dead void usage(void);
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void mkfs(struct partition *, char *, int, int, mode_t, uid_t, gid_t);
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void getphysmem(void);
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void rewritelabel(char *, int, struct disklabel *);
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u_short dkcksum(struct disklabel *);
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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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* 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_FFS1(bsize) ((bsize) / sizeof(int32_t))
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#define MAXBLKPG_FFS2(bsize) ((bsize) / sizeof(int64_t))
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/*
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* Each file system 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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int mfs; /* run as the memory based filesystem */
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int Nflag; /* run without writing file system */
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int Oflag = 2; /* 1 = 4.4BSD ffs, 2 = ffs2 */
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daddr_t fssize; /* file system size in 512-byte blocks */
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long long sectorsize; /* bytes/sector */
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int fsize = 0; /* fragment size */
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int bsize = 0; /* block size */
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int maxfrgspercg = INT_MAX; /* maximum fragments per cylinder group */
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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 reqopt = -1; /* opt preference has not been specified */
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int density; /* number of bytes per inode */
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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 mntflags = MNT_ASYNC; /* flags to be passed to mount */
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int quiet = 0; /* quiet flag */
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caddr_t membase; /* start address of memory based filesystem */
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char *disktype;
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int unlabeled;
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extern char *__progname;
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struct disklabel *getdisklabel(char *, int);
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#ifdef MFS
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static void waitformount(char *, pid_t);
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static int do_exec(const char *, const char *, char *const[]);
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static int isdir(const char *);
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static void copy(char *, char *);
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static int gettmpmnt(char *, size_t);
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#endif
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int64_t physmem;
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void
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getphysmem(void)
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{
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int mib[] = { CTL_HW, HW_PHYSMEM64 };
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size_t len = sizeof(physmem);
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if (sysctl(mib, 2, &physmem, &len, NULL, 0) != 0)
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err(1, "can't get physmem");
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}
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int
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main(int argc, char *argv[])
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{
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int ch;
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struct partition *pp;
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struct disklabel *lp;
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struct disklabel mfsfakelabel;
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struct partition oldpartition;
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struct stat st;
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struct statfs *mp;
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struct rlimit rl;
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int fsi = -1, oflagset = 0, fso, len, n, maxpartitions;
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char *cp = NULL, *s1, *s2, *special, *opstring, *realdev;
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#ifdef MFS
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char mountfromname[BUFSIZ];
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char *pop = NULL, node[PATH_MAX];
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pid_t pid;
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struct stat mountpoint;
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#endif
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uid_t mfsuid = 0;
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gid_t mfsgid = 0;
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mode_t mfsmode = 0;
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char *fstype = NULL;
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char **saveargv = argv;
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int ffsflag = 1;
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const char *errstr;
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long long fssize_input = 0;
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int fssize_usebytes = 0;
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int defaultfsize;
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u_int64_t nsecs;
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if (strstr(__progname, "mfs"))
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mfs = Nflag = quiet = Oflag = 1;
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getphysmem();
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maxpartitions = getmaxpartitions();
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if (maxpartitions > 26)
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fatal("insane maxpartitions value %d", maxpartitions);
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opstring = mfs ?
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"O:P:T:b:c:e:f:i:m:o:s:" :
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"NO:S:T:b:c:e:f:g:h:i:m:o:qs:t:";
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while ((ch = getopt(argc, argv, opstring)) != -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 'O':
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Oflag = strtonum(optarg, 1, 2, &errstr);
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if (errstr)
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fatal("%s: invalid ffs version", optarg);
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oflagset = 1;
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break;
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case 'S':
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if (scan_scaled(optarg, §orsize) == -1 ||
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sectorsize <= 0 || (sectorsize % DEV_BSIZE))
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fatal("sector size invalid: %s", 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 'b':
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bsize = strtonum(optarg, MINBSIZE, MAXBSIZE, &errstr);
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if (errstr)
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fatal("block size is %s: %s", errstr, optarg);
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break;
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case 'c':
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maxfrgspercg = strtonum(optarg, 1, INT_MAX, &errstr);
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if (errstr)
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fatal("fragments per cylinder group is %s: %s",
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errstr, optarg);
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break;
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case 'e':
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maxbpg = strtonum(optarg, 1, INT_MAX, &errstr);
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if (errstr)
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fatal("blocks per file in a cylinder group is"
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" %s: %s", errstr, optarg);
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break;
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case 'f':
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fsize = strtonum(optarg, MINBSIZE / MAXFRAG, MAXBSIZE,
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&errstr);
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if (errstr)
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fatal("fragment size is %s: %s",
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errstr, optarg);
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break;
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case 'g':
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avgfilesize = strtonum(optarg, 1, INT_MAX, &errstr);
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if (errstr)
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fatal("average file size is %s: %s",
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errstr, optarg);
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break;
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case 'h':
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avgfilesperdir = strtonum(optarg, 1, INT_MAX, &errstr);
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if (errstr)
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fatal("average files per dir is %s: %s",
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errstr, optarg);
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break;
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case 'i':
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density = strtonum(optarg, 1, INT_MAX, &errstr);
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if (errstr)
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fatal("bytes per inode is %s: %s",
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errstr, optarg);
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break;
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case 'm':
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minfree = strtonum(optarg, 0, 99, &errstr);
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if (errstr)
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fatal("free space %% is %s: %s",
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errstr, optarg);
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break;
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case 'o':
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if (mfs)
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getmntopts(optarg, mopts, &mntflags);
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else {
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if (strcmp(optarg, "space") == 0)
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reqopt = opt = FS_OPTSPACE;
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else if (strcmp(optarg, "time") == 0)
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reqopt = opt = FS_OPTTIME;
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else
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fatal("%s: unknown optimization "
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"preference: use `space' or `time'.",
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optarg);
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}
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break;
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case 'q':
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quiet = 1;
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break;
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case 's':
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if (scan_scaled(optarg, &fssize_input) == -1 ||
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fssize_input <= 0)
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fatal("file system size invalid: %s", optarg);
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fssize_usebytes = 0; /* in case of multiple -s */
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for (s1 = optarg; *s1 != '\0'; s1++)
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if (isalpha((unsigned char)*s1)) {
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fssize_usebytes = 1;
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break;
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}
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break;
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case 't':
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fstype = optarg;
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if (strcmp(fstype, "ffs"))
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ffsflag = 0;
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break;
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#ifdef MFS
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case 'P':
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pop = optarg;
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break;
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#endif
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default:
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usage();
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}
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if (!ffsflag)
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break;
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}
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argc -= optind;
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argv += optind;
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if (ffsflag && argc - mfs != 1)
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usage();
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if (mfs) {
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/* Increase our data size to the max */
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if (getrlimit(RLIMIT_DATA, &rl) == 0) {
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rl.rlim_cur = rl.rlim_max;
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(void)setrlimit(RLIMIT_DATA, &rl);
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}
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}
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special = argv[0];
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if (!mfs) {
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char execname[PATH_MAX], name[PATH_MAX];
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if (fstype == NULL)
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fstype = readlabelfs(special, 0);
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if (fstype != NULL && strcmp(fstype, "ffs")) {
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snprintf(name, sizeof name, "newfs_%s", fstype);
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saveargv[0] = name;
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snprintf(execname, sizeof execname, "%s/newfs_%s",
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_PATH_SBIN, fstype);
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(void)execv(execname, saveargv);
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snprintf(execname, sizeof execname, "%s/newfs_%s",
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_PATH_USRSBIN, fstype);
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(void)execv(execname, saveargv);
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err(1, "%s not found", name);
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}
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}
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if (mfs && !strcmp(special, "swap")) {
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/*
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* it's an MFS, mounted on "swap." fake up a label.
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* XXX XXX XXX
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*/
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fso = -1; /* XXX; normally done below. */
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memset(&mfsfakelabel, 0, sizeof(mfsfakelabel));
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mfsfakelabel.d_secsize = 512;
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mfsfakelabel.d_nsectors = 64;
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mfsfakelabel.d_ntracks = 16;
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mfsfakelabel.d_ncylinders = 16;
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mfsfakelabel.d_secpercyl = 1024;
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DL_SETDSIZE(&mfsfakelabel, 16384);
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mfsfakelabel.d_npartitions = 1;
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mfsfakelabel.d_version = 1;
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DL_SETPSIZE(&mfsfakelabel.d_partitions[0], 16384);
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mfsfakelabel.d_partitions[0].p_fragblock =
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DISKLABELV1_FFS_FRAGBLOCK(1024, 8);
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mfsfakelabel.d_partitions[0].p_cpg = 16;
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lp = &mfsfakelabel;
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pp = &mfsfakelabel.d_partitions[0];
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goto havelabel;
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}
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if (Nflag) {
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fso = -1;
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} else {
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fso = opendev(special, O_WRONLY, 0, &realdev);
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if (fso == -1)
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fatal("%s: %s", special, strerror(errno));
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special = realdev;
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/* Bail if target special is mounted */
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n = getmntinfo(&mp, MNT_NOWAIT);
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if (n == 0)
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fatal("%s: getmntinfo: %s", special, strerror(errno));
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len = sizeof(_PATH_DEV) - 1;
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s1 = special;
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if (strncmp(_PATH_DEV, s1, len) == 0)
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s1 += len;
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while (--n >= 0) {
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s2 = mp->f_mntfromname;
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if (strncmp(_PATH_DEV, s2, len) == 0) {
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s2 += len - 1;
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*s2 = 'r';
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}
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if (strcmp(s1, s2) == 0 || strcmp(s1, &s2[1]) == 0)
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fatal("%s is mounted on %s",
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special, mp->f_mntonname);
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++mp;
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}
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}
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if (mfs && disktype != NULL) {
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lp = (struct disklabel *)getdiskbyname(disktype);
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if (lp == NULL)
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fatal("%s: unknown disk type", disktype);
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pp = &lp->d_partitions[1];
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} else {
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fsi = opendev(special, O_RDONLY, 0, NULL);
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if (fsi == -1)
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fatal("%s: %s", special, strerror(errno));
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if (fstat(fsi, &st) == -1)
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fatal("%s: %s", special, strerror(errno));
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if (!mfs) {
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if (S_ISBLK(st.st_mode))
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fatal("%s: block device", special);
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if (!S_ISCHR(st.st_mode))
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warnx("%s: not a character-special device",
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special);
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}
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if (*argv[0] == '\0')
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fatal("empty partition name supplied");
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cp = argv[0] + strlen(argv[0]) - 1;
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if ((*cp < 'a' || *cp > ('a' + maxpartitions - 1))
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&& !isdigit((unsigned char)*cp))
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fatal("%s: can't figure out file system partition",
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argv[0]);
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lp = getdisklabel(special, fsi);
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if (!mfs) {
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if (pledge("stdio disklabel tty", NULL) == -1)
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err(1, "pledge");
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}
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if (isdigit((unsigned char)*cp))
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pp = &lp->d_partitions[0];
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else
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pp = &lp->d_partitions[*cp - 'a'];
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if (DL_GETPSIZE(pp) == 0)
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fatal("%s: `%c' partition is unavailable",
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argv[0], *cp);
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}
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havelabel:
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if (sectorsize == 0) {
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sectorsize = lp->d_secsize;
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if (sectorsize <= 0)
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fatal("%s: no default sector size", argv[0]);
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}
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if (fssize_usebytes) {
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nsecs = fssize_input / sectorsize;
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if (fssize_input % sectorsize != 0)
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nsecs++;
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} else if (fssize_input == 0)
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nsecs = DL_GETPSIZE(pp);
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else
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nsecs = fssize_input;
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|
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if (nsecs > DL_GETPSIZE(pp) && !mfs)
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fatal("%s: maximum file system size on the `%c' partition is "
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"%llu sectors", argv[0], *cp, DL_GETPSIZE(pp));
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|
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/* Can't use DL_SECTOBLK() because sectorsize may not be from label! */
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fssize = nsecs * (sectorsize / DEV_BSIZE);
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if (oflagset == 0 && fssize >= INT_MAX)
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Oflag = 2; /* FFS2 */
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defaultfsize = fsize == 0;
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if (fsize == 0) {
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fsize = DISKLABELV1_FFS_FSIZE(pp->p_fragblock);
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if (fsize <= 0)
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fsize = MAXIMUM(DFL_FRAGSIZE, lp->d_secsize);
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}
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if (bsize == 0) {
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bsize = DISKLABELV1_FFS_BSIZE(pp->p_fragblock);
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if (bsize <= 0)
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bsize = MINIMUM(DFL_BLKSIZE, 8 * fsize);
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}
|
|
if (density == 0) {
|
|
density = NFPI * fsize;
|
|
/* large sectors lead to fewer inodes due to large fsize,
|
|
compensate */
|
|
if (defaultfsize && sectorsize > DEV_BSIZE)
|
|
density /= 2;
|
|
}
|
|
if (minfree < MINFREE && opt != FS_OPTSPACE && reqopt == -1) {
|
|
warnx("warning: changing optimization to space "
|
|
"because minfree is less than %d%%\n", MINFREE);
|
|
opt = FS_OPTSPACE;
|
|
}
|
|
if (maxbpg == 0) {
|
|
if (Oflag <= 1)
|
|
maxbpg = MAXBLKPG_FFS1(bsize);
|
|
else
|
|
maxbpg = MAXBLKPG_FFS2(bsize);
|
|
}
|
|
oldpartition = *pp;
|
|
#ifdef MFS
|
|
if (mfs) {
|
|
if (realpath(argv[1], node) == NULL)
|
|
err(1, "realpath %s", argv[1]);
|
|
if (stat(node, &mountpoint) == -1)
|
|
err(ECANCELED, "stat %s", node);
|
|
mfsuid = mountpoint.st_uid;
|
|
mfsgid = mountpoint.st_gid;
|
|
mfsmode = mountpoint.st_mode & ALLPERMS;
|
|
}
|
|
#endif
|
|
|
|
mkfs(pp, special, fsi, fso, mfsmode, mfsuid, mfsgid);
|
|
if (!Nflag && memcmp(pp, &oldpartition, sizeof(oldpartition)))
|
|
rewritelabel(special, fso, lp);
|
|
if (!Nflag)
|
|
close(fso);
|
|
if (fsi != -1)
|
|
close(fsi);
|
|
#ifdef MFS
|
|
if (mfs) {
|
|
struct mfs_args args;
|
|
char tmpnode[PATH_MAX];
|
|
|
|
if (pop != NULL && gettmpmnt(tmpnode, sizeof(tmpnode)) == 0)
|
|
errx(1, "Cannot create tmp mountpoint for -P");
|
|
memset(&args, 0, sizeof(args));
|
|
args.base = membase;
|
|
args.size = fssize * DEV_BSIZE;
|
|
args.export_info.ex_root = -2;
|
|
if (mntflags & MNT_RDONLY)
|
|
args.export_info.ex_flags = MNT_EXRDONLY;
|
|
if (mntflags & MNT_NOPERM)
|
|
mntflags |= MNT_NODEV | MNT_NOEXEC;
|
|
|
|
switch (pid = fork()) {
|
|
case -1:
|
|
err(10, "mfs");
|
|
case 0:
|
|
snprintf(mountfromname, sizeof(mountfromname),
|
|
"mfs:%d", getpid());
|
|
break;
|
|
default:
|
|
if (pop != NULL) {
|
|
waitformount(tmpnode, pid);
|
|
copy(pop, tmpnode);
|
|
unmount(tmpnode, 0);
|
|
rmdir(tmpnode);
|
|
}
|
|
waitformount(node, pid);
|
|
exit(0);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
(void) setsid();
|
|
(void) close(0);
|
|
(void) close(1);
|
|
(void) close(2);
|
|
(void) chdir("/");
|
|
|
|
args.fspec = mountfromname;
|
|
if (pop != NULL) {
|
|
int tmpflags = mntflags & ~MNT_RDONLY;
|
|
if (mount(MOUNT_MFS, tmpnode, tmpflags, &args) == -1)
|
|
exit(errno); /* parent prints message */
|
|
}
|
|
if (mount(MOUNT_MFS, node, mntflags, &args) == -1)
|
|
exit(errno); /* parent prints message */
|
|
}
|
|
#endif
|
|
exit(0);
|
|
}
|
|
|
|
struct disklabel *
|
|
getdisklabel(char *s, int fd)
|
|
{
|
|
static struct disklabel lab;
|
|
|
|
if (ioctl(fd, DIOCGDINFO, (char *)&lab) == -1) {
|
|
if (disktype != NULL) {
|
|
struct disklabel *lp;
|
|
|
|
unlabeled++;
|
|
lp = getdiskbyname(disktype);
|
|
if (lp == NULL)
|
|
fatal("%s: unknown disk type", disktype);
|
|
return (lp);
|
|
}
|
|
warn("ioctl (GDINFO)");
|
|
fatal("%s: can't read disk label; disk type must be specified",
|
|
s);
|
|
}
|
|
return (&lab);
|
|
}
|
|
|
|
void
|
|
rewritelabel(char *s, int fd, struct disklabel *lp)
|
|
{
|
|
if (unlabeled)
|
|
return;
|
|
|
|
lp->d_checksum = 0;
|
|
lp->d_checksum = dkcksum(lp);
|
|
if (ioctl(fd, DIOCWDINFO, (char *)lp) == -1) {
|
|
warn("ioctl (WDINFO)");
|
|
fatal("%s: can't rewrite disk label", s);
|
|
}
|
|
}
|
|
|
|
void
|
|
fatal(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
if (fcntl(STDERR_FILENO, F_GETFL) == -1) {
|
|
openlog(__progname, LOG_CONS, LOG_DAEMON);
|
|
vsyslog(LOG_ERR, fmt, ap);
|
|
closelog();
|
|
} else {
|
|
vwarnx(fmt, ap);
|
|
}
|
|
va_end(ap);
|
|
exit(1);
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
__dead void
|
|
usage(void)
|
|
{
|
|
extern char *__progname;
|
|
|
|
if (mfs) {
|
|
fprintf(stderr,
|
|
"usage: %s [-b block-size] [-c fragments-per-cylinder-group] "
|
|
"[-e maxbpg]\n"
|
|
"\t[-f frag-size] [-i bytes] [-m free-space] [-o options] "
|
|
"[-P file]\n"
|
|
"\t[-s size] special node\n",
|
|
__progname);
|
|
} else {
|
|
fprintf(stderr,
|
|
"usage: %s [-Nq] [-b block-size] "
|
|
"[-c fragments-per-cylinder-group] [-e maxbpg]\n"
|
|
"\t[-f frag-size] [-g avgfilesize] [-h avgfpdir] [-i bytes]\n"
|
|
"\t[-m free-space] [-O filesystem-format] [-o optimization]\n"
|
|
"\t[-S sector-size] [-s size] [-T disktype] [-t fstype] "
|
|
"special\n",
|
|
__progname);
|
|
}
|
|
|
|
exit(1);
|
|
}
|
|
|
|
#ifdef MFS
|
|
|
|
static void
|
|
waitformount(char *node, pid_t pid)
|
|
{
|
|
char mountfromname[BUFSIZ];
|
|
struct statfs sf;
|
|
int status;
|
|
pid_t res;
|
|
|
|
snprintf(mountfromname, sizeof(mountfromname), "mfs:%d", pid);
|
|
for (;;) {
|
|
/*
|
|
* spin until the mount succeeds
|
|
* or the child exits
|
|
*/
|
|
usleep(1);
|
|
|
|
/*
|
|
* XXX Here is a race condition: another process
|
|
* can mount a filesystem which hides our
|
|
* ramdisk before we see the success.
|
|
*/
|
|
if (statfs(node, &sf) == -1)
|
|
err(ECANCELED, "statfs %s", node);
|
|
if (!strcmp(sf.f_mntfromname, mountfromname) &&
|
|
!strncmp(sf.f_mntonname, node,
|
|
MNAMELEN) &&
|
|
!strcmp(sf.f_fstypename, "mfs")) {
|
|
return;
|
|
}
|
|
res = waitpid(pid, &status, WNOHANG);
|
|
if (res == -1)
|
|
err(EDEADLK, "waitpid");
|
|
if (res != pid)
|
|
continue;
|
|
if (WIFEXITED(status)) {
|
|
if (WEXITSTATUS(status) == 0)
|
|
exit(0);
|
|
errx(1, "%s: mount: %s", node,
|
|
strerror(WEXITSTATUS(status)));
|
|
} else
|
|
errx(EDEADLK, "abnormal termination");
|
|
}
|
|
}
|
|
|
|
static int
|
|
do_exec(const char *dir, const char *cmd, char *const argv[])
|
|
{
|
|
pid_t pid;
|
|
int ret, status;
|
|
sig_t intsave, quitsave;
|
|
|
|
switch (pid = fork()) {
|
|
case -1:
|
|
err(1, "fork");
|
|
case 0:
|
|
if (dir != NULL && chdir(dir) != 0)
|
|
err(1, "chdir");
|
|
if (execv(cmd, argv) != 0)
|
|
err(1, "%s", cmd);
|
|
break;
|
|
default:
|
|
intsave = signal(SIGINT, SIG_IGN);
|
|
quitsave = signal(SIGQUIT, SIG_IGN);
|
|
for (;;) {
|
|
ret = waitpid(pid, &status, 0);
|
|
if (ret == -1)
|
|
err(11, "waitpid");
|
|
if (WIFEXITED(status)) {
|
|
status = WEXITSTATUS(status);
|
|
if (status != 0)
|
|
warnx("%s: exited", cmd);
|
|
break;
|
|
} else if (WIFSIGNALED(status)) {
|
|
warnx("%s: %s", cmd,
|
|
strsignal(WTERMSIG(status)));
|
|
status = 1;
|
|
break;
|
|
}
|
|
}
|
|
signal(SIGINT, intsave);
|
|
signal(SIGQUIT, quitsave);
|
|
return (status);
|
|
}
|
|
/* NOTREACHED */
|
|
return (-1);
|
|
}
|
|
|
|
static int
|
|
isdir(const char *path)
|
|
{
|
|
struct stat st;
|
|
|
|
if (stat(path, &st) != 0)
|
|
err(1, "cannot stat %s", path);
|
|
if (!S_ISDIR(st.st_mode) && !S_ISBLK(st.st_mode))
|
|
errx(1, "%s: not a dir or a block device", path);
|
|
return (S_ISDIR(st.st_mode));
|
|
}
|
|
|
|
static void
|
|
copy(char *src, char *dst)
|
|
{
|
|
int ret, dir, created = 0;
|
|
struct ufs_args mount_args;
|
|
char mountpoint[MNAMELEN];
|
|
char *const argv[] = { "pax", "-rw", "-pe", ".", dst, NULL } ;
|
|
|
|
dir = isdir(src);
|
|
if (dir)
|
|
strlcpy(mountpoint, src, sizeof(mountpoint));
|
|
else {
|
|
created = gettmpmnt(mountpoint, sizeof(mountpoint));
|
|
memset(&mount_args, 0, sizeof(mount_args));
|
|
mount_args.fspec = src;
|
|
ret = mount(MOUNT_FFS, mountpoint, MNT_RDONLY, &mount_args);
|
|
if (ret != 0) {
|
|
int saved_errno = errno;
|
|
if (created && rmdir(mountpoint) != 0)
|
|
warn("rmdir %s", mountpoint);
|
|
if (unmount(dst, 0) != 0)
|
|
warn("unmount %s", dst);
|
|
errc(1, saved_errno, "mount %s %s", src, mountpoint);
|
|
}
|
|
}
|
|
ret = do_exec(mountpoint, "/bin/pax", argv);
|
|
if (!dir && unmount(mountpoint, 0) != 0)
|
|
warn("unmount %s", mountpoint);
|
|
if (created && rmdir(mountpoint) != 0)
|
|
warn("rmdir %s", mountpoint);
|
|
if (ret != 0) {
|
|
if (unmount(dst, 0) != 0)
|
|
warn("unmount %s", dst);
|
|
errx(1, "copy %s to %s failed", mountpoint, dst);
|
|
}
|
|
}
|
|
|
|
static int
|
|
gettmpmnt(char *mountpoint, size_t len)
|
|
{
|
|
const char *tmp = _PATH_TMP;
|
|
const char *mnt = _PATH_MNT;
|
|
struct statfs fs;
|
|
size_t n;
|
|
|
|
if (statfs(tmp, &fs) != 0)
|
|
err(1, "statfs %s", tmp);
|
|
if (fs.f_flags & MNT_RDONLY) {
|
|
if (statfs(mnt, &fs) != 0)
|
|
err(1, "statfs %s", mnt);
|
|
if (strcmp(fs.f_mntonname, "/") != 0)
|
|
errx(1, "tmp mountpoint %s busy", mnt);
|
|
if (strlcpy(mountpoint, mnt, len) >= len)
|
|
errx(1, "tmp mountpoint %s too long", mnt);
|
|
return (0);
|
|
}
|
|
n = strlcpy(mountpoint, tmp, len);
|
|
if (n >= len)
|
|
errx(1, "tmp mount point too long");
|
|
if (mountpoint[n - 1] != '/')
|
|
strlcat(mountpoint, "/", len);
|
|
n = strlcat(mountpoint, "mntXXXXXXXXXX", len);
|
|
if (n >= len)
|
|
errx(1, "tmp mount point too long");
|
|
if (mkdtemp(mountpoint) == NULL)
|
|
err(1, "mkdtemp %s", mountpoint);
|
|
return (1);
|
|
}
|
|
|
|
#endif /* MFS */
|