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NetBSD/sbin/newfs/newfs.c

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/* $NetBSD: newfs.c,v 1.59 2002/08/08 13:24:13 soren Exp $ */
/*
* Copyright (c) 1983, 1989, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1983, 1989, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)newfs.c 8.13 (Berkeley) 5/1/95";
#else
__RCSID("$NetBSD: newfs.c,v 1.59 2002/08/08 13:24:13 soren Exp $");
#endif
#endif /* not lint */
/*
* newfs: friendly front end to mkfs
*/
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/disklabel.h>
#include <sys/file.h>
#include <sys/mount.h>
#include <sys/sysctl.h>
#include <sys/wait.h>
#include <ufs/ufs/dir.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ffs/fs.h>
#include <ctype.h>
#include <disktab.h>
#include <err.h>
#include <errno.h>
#include <grp.h>
#include <paths.h>
#include <pwd.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include <util.h>
#include "mntopts.h"
#include "dkcksum.h"
#include "extern.h"
struct mntopt mopts[] = {
MOPT_STDOPTS,
MOPT_ASYNC,
MOPT_UPDATE,
MOPT_NOATIME,
{ NULL },
};
static struct disklabel *getdisklabel(char *, int);
static void rewritelabel(char *, int, struct disklabel *);
static gid_t mfs_group(const char *);
static uid_t mfs_user(const char *);
static int strsuftoi(const char *, const char *, int, int);
static void usage(void);
int main(int, char *[]);
#define COMPAT /* allow non-labeled disks */
/*
* The following two constants set the default block and fragment sizes.
* Both constants must be a power of 2 and meet the following constraints:
* MINBSIZE <= DESBLKSIZE <= MAXBSIZE
* sectorsize <= DESFRAGSIZE <= DESBLKSIZE
* DESBLKSIZE / DESFRAGSIZE <= 8
*/
/*
* For file systems smaller than SMALL_FSSIZE we use the S_DFL_* defaults,
* otherwise if less than MEDIUM_FSSIZE use M_DFL_*, otherwise use
* L_DFL_*.
*/
#define SMALL_FSSIZE (20*1024*2)
#define S_DFL_FRAGSIZE 512
#define S_DFL_BLKSIZE 4096
#define MEDIUM_FSSIZE (1000*1024*2)
#define M_DFL_FRAGSIZE 1024
#define M_DFL_BLKSIZE 8192
#define L_DFL_FRAGSIZE 2048
#define L_DFL_BLKSIZE 16384
/*
* Default sector size.
*/
#define DFL_SECSIZE 512
/*
* Cylinder groups may have up to many cylinders. The actual
* number used depends upon how much information can be stored
* on a single cylinder. The default is to use 16 cylinders
* per group.
*/
#define DESCPG 65536 /* desired fs_cpg ("infinity") */
/*
* ROTDELAY gives the minimum number of milliseconds to initiate
* another disk transfer on the same cylinder. It is used in
* determining the rotationally optimal layout for disk blocks
* within a file; the default of fs_rotdelay is 0ms.
*/
#define ROTDELAY 0
/*
* MAXBLKPG determines the maximum number of data blocks which are
* placed in a single cylinder group. The default is one indirect
* block worth of data blocks.
*/
#define MAXBLKPG(bsize) ((bsize) / sizeof(daddr_t))
/*
* Each file system has a number of inodes statically allocated.
* We allocate one inode slot per NFPI fragments, expecting this
* to be far more than we will ever need.
*/
#define NFPI 4
/*
* For each cylinder we keep track of the availability of blocks at different
* rotational positions, so that we can lay out the data to be picked
* up with minimum rotational latency. NRPOS is the default number of
* rotational positions that we distinguish. With NRPOS of 8 the resolution
* of our summary information is 2ms for a typical 3600 rpm drive. Caching
* and zoning pretty much defeats rotational optimization, so we now use a
* default of 1.
*/
#define NRPOS 1 /* number distinct rotational positions */
int mfs; /* run as the memory based filesystem */
int Nflag; /* run without writing file system */
int Oflag; /* format as an 4.3BSD file system */
int fssize; /* file system size */
int ntracks; /* # tracks/cylinder */
int nsectors; /* # sectors/track */
int nphyssectors; /* # sectors/track including spares */
int secpercyl; /* sectors per cylinder */
int trackspares = -1; /* spare sectors per track */
int cylspares = -1; /* spare sectors per cylinder */
int sectorsize; /* bytes/sector */
int rpm; /* revolutions/minute of drive */
int interleave; /* hardware sector interleave */
int trackskew = -1; /* sector 0 skew, per track */
int fsize = 0; /* fragment size */
int bsize = 0; /* block size */
int cpg = DESCPG; /* cylinders/cylinder group */
int cpgflg; /* cylinders/cylinder group flag was given */
int minfree = MINFREE; /* free space threshold */
int opt = DEFAULTOPT; /* optimization preference (space or time) */
int density; /* number of bytes per inode */
int maxcontig = 0; /* max contiguous blocks to allocate */
int rotdelay = ROTDELAY; /* rotational delay between blocks */
int maxbpg; /* maximum blocks per file in a cyl group */
int nrpos = NRPOS; /* # of distinguished rotational positions */
int avgfilesize = AVFILESIZ;/* expected average file size */
int avgfpdir = AFPDIR; /* expected number of files per directory */
int bbsize = BBSIZE; /* boot block size */
int sbsize = SBSIZE; /* superblock size */
int mntflags = MNT_ASYNC; /* flags to be passed to mount */
u_long memleft; /* virtual memory available */
caddr_t membase; /* start address of memory based filesystem */
int needswap; /* Filesystem not in native byte order */
#ifdef COMPAT
char *disktype;
int unlabeled;
#endif
char device[MAXPATHLEN];
int
main(int argc, char *argv[])
{
struct partition *pp;
struct disklabel *lp;
struct disklabel mfsfakelabel;
struct partition oldpartition;
struct statfs *mp;
int ch, fsi, fso, len, maxpartitions, n, Fflag, Iflag, Zflag;
char *cp, *endp, *s1, *s2, *special;
const char *opstring;
long long llsize;
int dfl_fragsize, dfl_blksize;
#ifdef MFS
char mountfromname[100];
pid_t pid, res;
struct statfs sf;
int status;
#endif
mode_t mfsmode;
uid_t mfsuid;
gid_t mfsgid;
cp = NULL;
fsi = fso = -1;
Fflag = Iflag = Zflag = 0;
if (strstr(getprogname(), "mfs")) {
mfs = 1;
mfsmode = 01777; /* default mode for a /tmp-type directory */
mfsuid = 0; /* user root */
mfsgid = 0; /* group wheel */
Nflag++;
}
maxpartitions = getmaxpartitions();
if (maxpartitions > 26)
errx(1, "insane maxpartitions value %d", maxpartitions);
opstring = mfs ?
"NT:a:b:c:d:e:f:g:h:i:m:o:p:s:u:" :
"B:FINOS:T:Za:b:c:d:e:f:g:h:i:k:l:m:n:o:p:r:s:t:u:x:";
while ((ch = getopt(argc, argv, opstring)) != -1)
switch (ch) {
case 'B':
if (strcmp(optarg, "be") == 0) {
#if BYTE_ORDER == LITTLE_ENDIAN
needswap = 1;
#endif
} else if (strcmp(optarg, "le") == 0) {
#if BYTE_ORDER == BIG_ENDIAN
needswap = 1;
#endif
} else
usage();
break;
case 'F':
Fflag = 1;
break;
case 'I':
Iflag = 1;
break;
case 'N':
Nflag = 1;
break;
case 'O':
Oflag = 1;
break;
case 'S':
sectorsize = strsuftoi("sector size",
optarg, 1, INT_MAX);
break;
#ifdef COMPAT
case 'T':
disktype = optarg;
break;
#endif
case 'Z':
Zflag = 1;
break;
case 'a':
maxcontig = strsuftoi("maximum contiguous blocks",
optarg, 1, INT_MAX);
break;
case 'b':
bsize = strsuftoi("block size",
optarg, MINBSIZE, MAXBSIZE);
break;
case 'c':
cpg = strsuftoi("cylinders per group",
optarg, 1, INT_MAX);
cpgflg++;
break;
case 'd':
rotdelay = strsuftoi("rotational delay",
optarg, 0, INT_MAX);
break;
case 'e':
maxbpg = strsuftoi(
"blocks per file in a cylinder group",
optarg, 1, INT_MAX);
break;
case 'f':
fsize = strsuftoi("fragment size",
optarg, 1, MAXBSIZE);
break;
case 'g':
if (mfs)
mfsgid = mfs_group(optarg);
else {
avgfilesize = strsuftoi("average file size",
optarg, 1, INT_MAX);
}
break;
case 'h':
avgfpdir = strsuftoi("expected files per directory",
optarg, 1, INT_MAX);
break;
case 'i':
density = strsuftoi("bytes per inode",
optarg, 1, INT_MAX);
break;
case 'k':
trackskew = strsuftoi("track skew",
optarg, 0, INT_MAX);
break;
case 'l':
interleave = strsuftoi("interleave",
optarg, 1, INT_MAX);
break;
case 'm':
minfree = strsuftoi("free space %",
optarg, 0, 99);
break;
case 'n':
nrpos = strsuftoi("rotational layout count",
optarg, 1, INT_MAX);
break;
case 'o':
if (mfs)
getmntopts(optarg, mopts, &mntflags, 0);
else {
if (strcmp(optarg, "space") == 0)
opt = FS_OPTSPACE;
else if (strcmp(optarg, "time") == 0)
opt = FS_OPTTIME;
else
errx(1, "%s %s",
"unknown optimization preference: ",
"use `space' or `time'.");
}
break;
case 'p':
if (mfs) {
if ((mfsmode = strtol(optarg, NULL, 8)) <= 0)
errx(1, "bad mode `%s'", optarg);
} else {
trackspares = strsuftoi(
"spare sectors per track", optarg, 0,
INT_MAX);
}
break;
case 'r':
rpm = strsuftoi("revolutions per minute",
optarg, 1, INT_MAX);
break;
case 's':
llsize = strtoll(optarg, &endp, 10);
if (endp[0] != '\0' && endp[1] != '\0')
llsize = -1;
else {
int ssiz;
ssiz = (sectorsize ? sectorsize : DFL_SECSIZE);
switch (tolower((unsigned char)endp[0])) {
case 'b':
llsize /= ssiz;
break;
case 'k':
llsize *= 1024 / ssiz;
break;
case 'm':
llsize *= 1024 * 1024 / ssiz;
break;
case 'g':
llsize *= 1024 * 1024 * 1024 / ssiz;
break;
case '\0':
case 's':
break;
default:
llsize = -1;
}
}
if (llsize > INT_MAX)
errx(1, "file system size `%s' is too large.",
optarg);
if (llsize <= 0)
errx(1,
"`%s' is not a valid number for file system size.",
optarg);
fssize = (int)llsize;
break;
case 't':
ntracks = strsuftoi("total tracks",
optarg, 1, INT_MAX);
break;
case 'u':
if (mfs)
mfsuid = mfs_user(optarg);
else {
nsectors = strsuftoi("sectors per track",
optarg, 1, INT_MAX);
}
break;
case 'x':
cylspares = strsuftoi("spare sectors per cylinder",
optarg, 0, INT_MAX);
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc != 2 && (mfs || argc != 1))
usage();
special = argv[0];
if (Fflag || mfs) {
/*
* it's a file system image or an MFS, so fake up a label.
* XXX
*/
if (!sectorsize)
sectorsize = DFL_SECSIZE;
if (Fflag && !Nflag) { /* creating image in a regular file */
if (fssize == 0)
errx(1, "need to specify size when using -F");
fso = open(special, O_RDWR | O_CREAT | O_TRUNC, 0777);
if (fso == -1)
err(1, "can't open file %s", special);
if ((fsi = dup(fso)) == -1)
err(1, "can't dup(2) image fd");
/* XXXLUKEM: only ftruncate() regular files ? */
if (ftruncate(fso, (off_t)fssize * sectorsize) == -1)
err(1, "can't resize %s to %d",
special, fssize);
if (Zflag) { /* pre-zero the file */
char *buf;
int bufsize, i;
off_t bufrem;
struct statfs sfs;
if (fstatfs(fso, &sfs) == -1) {
warn("can't fstatfs `%s'", special);
bufsize = 8192;
} else
bufsize = sfs.f_iosize;
if ((buf = calloc(1, bufsize)) == NULL)
err(1, "can't malloc buffer of %d",
bufsize);
bufrem = fssize * sectorsize;
printf(
"Creating file system image in `%s', size %lld bytes, in %d byte chunks.\n",
special, (long long)bufrem, bufsize);
while (bufrem > 0) {
i = write(fso, buf,
MIN(bufsize, bufrem));
if (i == -1)
err(1, "writing image");
bufrem -= i;
}
}
}
memset(&mfsfakelabel, 0, sizeof(mfsfakelabel));
mfsfakelabel.d_secsize = sectorsize;
mfsfakelabel.d_nsectors = 64; /* these 3 add up to 16MB */
mfsfakelabel.d_ntracks = 16;
mfsfakelabel.d_ncylinders = 16;
mfsfakelabel.d_secpercyl =
mfsfakelabel.d_nsectors * mfsfakelabel.d_ntracks;
mfsfakelabel.d_secperunit =
mfsfakelabel.d_ncylinders * mfsfakelabel.d_secpercyl;
mfsfakelabel.d_rpm = 10000;
mfsfakelabel.d_interleave = 1;
mfsfakelabel.d_npartitions = 1;
mfsfakelabel.d_partitions[0].p_size = mfsfakelabel.d_secperunit;
mfsfakelabel.d_partitions[0].p_fsize = 1024;
mfsfakelabel.d_partitions[0].p_frag = 8;
mfsfakelabel.d_partitions[0].p_cpg = 16;
lp = &mfsfakelabel;
pp = &mfsfakelabel.d_partitions[0];
} else { /* !Fflag && !mfs */
fsi = opendisk(special, O_RDONLY, device, sizeof(device), 0);
special = device;
if (fsi < 0)
err(1, "%s: open for read", special);
if (Nflag) {
fso = -1;
} else {
fso = open(special, O_WRONLY);
if (fso < 0)
err(1, "%s: open for write", special);
/* Bail if target special is mounted */
n = getmntinfo(&mp, MNT_NOWAIT);
if (n == 0)
err(1, "%s: getmntinfo", special);
len = sizeof(_PATH_DEV) - 1;
s1 = special;
if (strncmp(_PATH_DEV, s1, len) == 0)
s1 += len;
while (--n >= 0) {
s2 = mp->f_mntfromname;
if (strncmp(_PATH_DEV, s2, len) == 0) {
s2 += len - 1;
*s2 = 'r';
}
if (strcmp(s1, s2) == 0 ||
strcmp(s1, &s2[1]) == 0)
errx(1, "%s is mounted on %s",
special, mp->f_mntonname);
++mp;
}
}
cp = strchr(argv[0], '\0') - 1;
if (cp == 0 || ((*cp < 'a' || *cp > ('a' + maxpartitions - 1))
&& !isdigit(*cp)))
errx(1, "can't figure out file system partition");
#ifdef COMPAT
if (disktype == NULL)
disktype = argv[1];
#endif
lp = getdisklabel(special, fsi);
if (isdigit(*cp))
pp = &lp->d_partitions[0];
else
pp = &lp->d_partitions[*cp - 'a'];
if (pp->p_size == 0)
errx(1, "`%c' partition is unavailable", *cp);
if (!Iflag && pp->p_fstype != FS_BSDFFS)
errx(1, "`%c' partition type is not `4.2BSD'", *cp);
} /* !Fflag && !mfs */
if (fssize == 0)
fssize = pp->p_size;
if (fssize > pp->p_size && !mfs && !Fflag)
errx(1, "maximum file system size on the `%c' partition is %d",
*cp, pp->p_size);
if (rpm == 0) {
rpm = lp->d_rpm;
if (rpm <= 0)
rpm = 3600;
}
if (ntracks == 0) {
ntracks = lp->d_ntracks;
if (ntracks <= 0)
errx(1, "no default #tracks");
}
if (nsectors == 0) {
nsectors = lp->d_nsectors;
if (nsectors <= 0)
errx(1, "no default #sectors/track");
}
if (sectorsize == 0) {
sectorsize = lp->d_secsize;
if (sectorsize <= 0)
errx(1, "no default sector size");
}
if (trackskew == -1) {
trackskew = lp->d_trackskew;
if (trackskew < 0)
trackskew = 0;
}
if (interleave == 0) {
interleave = lp->d_interleave;
if (interleave <= 0)
interleave = 1;
}
if (fssize < SMALL_FSSIZE) {
dfl_fragsize = S_DFL_FRAGSIZE;
dfl_blksize = S_DFL_BLKSIZE;
} else if (fssize < MEDIUM_FSSIZE) {
dfl_fragsize = M_DFL_FRAGSIZE;
dfl_blksize = M_DFL_BLKSIZE;
} else {
dfl_fragsize = L_DFL_FRAGSIZE;
dfl_blksize = L_DFL_BLKSIZE;
}
if (fsize == 0) {
fsize = pp->p_fsize;
if (fsize <= 0)
fsize = MAX(dfl_fragsize, lp->d_secsize);
}
if (bsize == 0) {
bsize = pp->p_frag * pp->p_fsize;
if (bsize <= 0)
bsize = MIN(dfl_blksize, 8 * fsize);
}
/*
* Maxcontig sets the default for the maximum number of blocks
* that may be allocated sequentially. With filesystem clustering
* it is possible to allocate contiguous blocks up to the maximum
* transfer size permitted by the controller or buffering.
*/
if (maxcontig == 0)
maxcontig = MAX(1, MIN(MAXPHYS, MAXBSIZE) / bsize);
if (density == 0)
density = NFPI * fsize;
if (minfree < MINFREE && opt != FS_OPTSPACE) {
warnx("%s %s %d%%", "Warning: changing optimization to space",
"because minfree is less than", MINFREE);
opt = FS_OPTSPACE;
}
if (trackspares == -1) {
trackspares = lp->d_sparespertrack;
if (trackspares < 0)
trackspares = 0;
}
nphyssectors = nsectors + trackspares;
if (cylspares == -1) {
cylspares = lp->d_sparespercyl;
if (cylspares < 0)
cylspares = 0;
}
secpercyl = nsectors * ntracks - cylspares;
if (secpercyl != lp->d_secpercyl)
warnx("%s (%d) %s (%u)",
"Warning: calculated sectors per cylinder", secpercyl,
"disagrees with disk label", lp->d_secpercyl);
if (maxbpg == 0)
maxbpg = MAXBLKPG(bsize);
#ifdef notdef /* label may be 0 if faked up by kernel */
bbsize = lp->d_bbsize;
sbsize = lp->d_sbsize;
#endif
oldpartition = *pp;
mkfs(pp, special, fsi, fso, mfsmode, mfsuid, mfsgid);
if (!Nflag && memcmp(pp, &oldpartition, sizeof(oldpartition)) && !Fflag)
rewritelabel(special, fso, lp);
if (!Nflag)
close(fso);
close(fsi);
#ifdef MFS
if (mfs) {
struct mfs_args args;
switch (pid = fork()) {
case -1:
perror("mfs");
exit(10);
case 0:
(void)snprintf(mountfromname, sizeof(mountfromname),
"mfs:%d", getpid());
break;
default:
(void)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(argv[1], &sf) < 0)
err(88, "statfs %s", argv[1]);
if (!strcmp(sf.f_mntfromname, mountfromname) &&
!strncmp(sf.f_mntonname, argv[1],
MNAMELEN) &&
!strcmp(sf.f_fstypename, "mfs"))
exit(0);
res = waitpid(pid, &status, WNOHANG);
if (res == -1)
err(11, "waitpid");
if (res != pid)
continue;
if (WIFEXITED(status)) {
if (WEXITSTATUS(status) == 0)
exit(0);
errx(1, "%s: mount: %s", argv[1],
strerror(WEXITSTATUS(status)));
} else
errx(11, "abnormal termination");
}
/* NOTREACHED */
}
(void) setsid();
(void) close(0);
(void) close(1);
(void) close(2);
(void) chdir("/");
args.fspec = mountfromname;
args.export.ex_root = -2;
if (mntflags & MNT_RDONLY)
args.export.ex_flags = MNT_EXRDONLY;
else
args.export.ex_flags = 0;
args.base = membase;
args.size = fssize * sectorsize;
if (mount(MOUNT_MFS, argv[1], mntflags, &args) < 0)
exit(errno); /* parent prints message */
}
#endif
exit(0);
}
#ifdef COMPAT
const char lmsg[] = "%s: can't read disk label; disk type must be specified";
#else
const char lmsg[] = "%s: can't read disk label";
#endif
static struct disklabel *
getdisklabel(char *s, volatile int fd)
/* XXX why is fs volatile?! */
{
static struct disklabel lab;
if (ioctl(fd, DIOCGDINFO, &lab) < 0) {
#ifdef COMPAT
if (disktype) {
struct disklabel *lp;
unlabeled++;
lp = getdiskbyname(disktype);
if (lp == NULL)
errx(1, "%s: unknown disk type", disktype);
return (lp);
}
#endif
warn("ioctl (GDINFO)");
errx(1, lmsg, s);
}
return (&lab);
}
static void
rewritelabel(char *s, volatile int fd, struct disklabel *lp)
/* XXX why is fd volatile?! */
{
#ifdef COMPAT
if (unlabeled)
return;
#endif
lp->d_checksum = 0;
lp->d_checksum = dkcksum(lp);
if (ioctl(fd, DIOCWDINFO, (char *)lp) < 0) {
if (errno == ESRCH)
return;
warn("ioctl (WDINFO)");
errx(1, "%s: can't rewrite disk label", s);
}
#if __vax__
if (lp->d_type == DTYPE_SMD && lp->d_flags & D_BADSECT) {
int i;
int cfd;
daddr_t alt;
char specname[64];
char blk[1024];
char *cp;
/*
* Make name for 'c' partition.
*/
strcpy(specname, s);
cp = specname + strlen(specname) - 1;
if (!isdigit(*cp))
*cp = 'c';
cfd = open(specname, O_WRONLY);
if (cfd < 0)
err(1, "%s: open", specname);
memset(blk, 0, sizeof(blk));
*(struct disklabel *)(blk + LABELOFFSET) = *lp;
alt = lp->d_ncylinders * lp->d_secpercyl - lp->d_nsectors;
for (i = 1; i < 11 && i < lp->d_nsectors; i += 2) {
off_t offset;
offset = alt + i;
offset *= lp->d_secsize;
if (lseek(cfd, offset, SEEK_SET) == -1)
err(1, "lseek to badsector area: ");
if (write(cfd, blk, lp->d_secsize) < lp->d_secsize)
warn("alternate label %d write", i/2);
}
close(cfd);
}
#endif
}
static gid_t
mfs_group(const char *gname)
{
struct group *gp;
if (!(gp = getgrnam(gname)) && !isdigit((unsigned char)*gname))
errx(1, "unknown gname %s", gname);
return gp ? gp->gr_gid : atoi(gname);
}
static uid_t
mfs_user(const char *uname)
{
struct passwd *pp;
if (!(pp = getpwnam(uname)) && !isdigit((unsigned char)*uname))
errx(1, "unknown user %s", uname);
return pp ? pp->pw_uid : atoi(uname);
}
static int
strsuftoi(const char *desc, const char *arg, int min, int max)
{
long long result;
char *ep;
errno = 0;
result = strtoll(arg, &ep, 10);
if (ep[0] != '\0' && ep[1] != '\0')
errx(1, "%s `%s' is not a valid number.", desc, arg);
switch (tolower((unsigned char)ep[0])) {
case '\0':
case 'b':
break;
case 'k':
result <<= 10;
break;
case 'm':
result <<= 20;
break;
case 'g':
result <<= 30;
break;
default:
errx(1, "`%s' is not a valid suffix for %s.", ep, desc);
}
if (result < min)
errx(1, "%s `%s' (%lld) is less than minimum (%d).",
desc, arg, result, min);
if (result > max)
errx(1, "%s `%s' (%lld) is greater than maximum (%d).",
desc, arg, result, max);
return ((int)result);
}
#define NEWFS 1
#define MFS_MOUNT 2
#define BOTH NEWFS | MFS_MOUNT
struct help_strings {
int flags;
const char *str;
} const help_strings[] = {
{ NEWFS, "-B byteorder\tbyte order (`be' or `le')" },
{ NEWFS, "-F \t\tcreate file system image in regular file" },
{ NEWFS, "-I \t\tdo not check that the file system type is '4.2BSD'" },
{ BOTH, "-N \t\tdo not create file system, just print out "
"parameters" },
{ NEWFS, "-O \t\tcreate a 4.3BSD format filesystem" },
{ NEWFS, "-S secsize\tsector size" },
#ifdef COMPAT
{ NEWFS, "-T disktype\tdisk type" },
#endif
{ NEWFS, "-Z \t\tpre-zero the image file (with -F)" },
{ BOTH, "-a maxcontig\tmaximum contiguous blocks" },
{ BOTH, "-b bsize\tblock size" },
{ BOTH, "-c cpg\t\tcylinders/group" },
{ BOTH, "-d rotdelay\trotational delay between contiguous "
"blocks" },
{ BOTH, "-e maxbpg\tmaximum blocks per file in a cylinder group"
},
{ BOTH, "-f fsize\tfrag size" },
{ NEWFS, "-g avgfilesize\taverage file size" },
{ MFS_MOUNT, "-g groupname\tgroup name of mount point" },
{ BOTH, "-h avgfpdir\taverage files per directory" },
{ BOTH, "-i density\tnumber of bytes per inode" },
{ NEWFS, "-k trackskew\tsector 0 skew, per track" },
{ NEWFS, "-l interleave\thardware sector interleave" },
{ BOTH, "-m minfree\tminimum free space %%" },
{ NEWFS, "-n nrpos\tnumber of distinguished rotational "
"positions" },
{ BOTH, "-o optim\toptimization preference (`space' or `time')"
},
{ NEWFS, "-p tracksparse\tspare sectors per track" },
{ MFS_MOUNT, "-p perm\t\tpermissions (in octal)" },
{ BOTH, "-s fssize\tfile system size (sectors)" },
{ NEWFS, "-r rpm\t\trevolutions/minute" },
{ NEWFS, "-t ntracks\ttracks/cylinder" },
{ NEWFS, "-u nsectors\tsectors/track" },
{ MFS_MOUNT, "-u username\tuser name of mount point" },
{ NEWFS, "-x cylspares\tspare sectors per cylinder" },
{ 0, NULL }
};
static void
usage(void)
{
int match;
const struct help_strings *hs;
if (mfs) {
fprintf(stderr,
"usage: %s [ fsoptions ] special-device mount-point\n",
getprogname());
} else
fprintf(stderr,
"usage: %s [ fsoptions ] special-device%s\n",
getprogname(),
#ifdef COMPAT
" [device-type]");
#else
"");
#endif
fprintf(stderr, "where fsoptions are:\n");
match = mfs ? MFS_MOUNT : NEWFS;
for (hs = help_strings; hs->flags != 0; hs++)
if (hs->flags & match)
fprintf(stderr, "\t%s\n", hs->str);
exit(1);
}
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