OpenBSD-4.6/sbin/newfs/newfs.c
/* $OpenBSD: newfs.c,v 1.81 2008/08/08 23:49:53 krw Exp $ */
/* $NetBSD: newfs.c,v 1.20 1996/05/16 07:13:03 thorpej Exp $ */
/*
* Copyright (c) 2002 Networks Associates Technology, Inc.
* All rights reserved.
*
* This software was developed for the FreeBSD Project by Marshall
* Kirk McKusick and Network Associates Laboratories, the Security
* Research Division of Network Associates, Inc. under DARPA/SPAWAR
* contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
* research program.
*
* 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. 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/param.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/disklabel.h>
#include <sys/mount.h>
#include <sys/resource.h>
#include <sys/sysctl.h>
#include <sys/wait.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ufs/dir.h>
#include <ufs/ffs/fs.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include <signal.h>
#include <util.h>
#include "mntopts.h"
#include "pathnames.h"
struct mntopt mopts[] = {
MOPT_STDOPTS,
MOPT_ASYNC,
MOPT_UPDATE,
{ NULL },
};
void fatal(const char *fmt, ...);
__dead void usage(void);
void mkfs(struct partition *, char *, int, int, mode_t, uid_t, gid_t);
void rewritelabel(char *, int, struct disklabel *);
u_short dkcksum(struct disklabel *);
/*
* 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
*/
#define DFL_FRAGSIZE 2048
#define DFL_BLKSIZE 16384
/*
* 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_FFS1(bsize) ((bsize) / sizeof(int32_t))
#define MAXBLKPG_FFS2(bsize) ((bsize) / sizeof(int64_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
int mfs; /* run as the memory based filesystem */
int Nflag; /* run without writing file system */
int Oflag = 1; /* 0 = 4.3BSD ffs, 1 = 4.4BSD ffs, 2 = ffs2 */
daddr64_t fssize; /* file system size */
int sectorsize; /* bytes/sector */
int fsize = 0; /* fragment size */
int bsize = 0; /* block size */
int maxfrgspercg = INT_MAX; /* maximum fragments per cylinder group */
int minfree = MINFREE; /* free space threshold */
int opt = DEFAULTOPT; /* optimization preference (space or time) */
int reqopt = -1; /* opt preference has not been specified */
int density; /* number of bytes per inode */
int maxbpg; /* maximum blocks per file in a cyl group */
int avgfilesize = AVFILESIZ;/* expected average file size */
int avgfilesperdir = AFPDIR;/* expected number of files per directory */
int mntflags = MNT_ASYNC; /* flags to be passed to mount */
int quiet = 0; /* quiet flag */
u_long memleft; /* virtual memory available */
caddr_t membase; /* start address of memory based filesystem */
char *disktype;
int unlabeled;
char device[MAXPATHLEN];
extern char *__progname;
struct disklabel *getdisklabel(char *, int);
#ifdef MFS
static int do_exec(const char *, const char *, char *const[]);
static int isdir(const char *);
static void copy(char *, char *, struct mfs_args *);
static int gettmpmnt(char *, size_t);
#endif
int
main(int argc, char *argv[])
{
int ch;
struct partition *pp;
struct disklabel *lp;
struct disklabel mfsfakelabel;
struct partition oldpartition;
struct stat st;
struct statfs *mp;
struct rlimit rl;
int fsi = -1, fso, len, n, maxpartitions;
char *cp = NULL, *s1, *s2, *special, *opstring;
#ifdef MFS
char mountfromname[BUFSIZ];
char *pop = NULL, node[MAXPATHLEN];
pid_t pid, res;
struct statfs sf;
struct stat mountpoint;
int status;
#endif
uid_t mfsuid = 0;
gid_t mfsgid = 0;
mode_t mfsmode = 0;
char *fstype = NULL;
char **saveargv = argv;
int ffsflag = 1;
const char *errstr;
if (strstr(__progname, "mfs"))
mfs = Nflag = quiet = 1;
maxpartitions = getmaxpartitions();
if (maxpartitions > 26)
fatal("insane maxpartitions value %d", maxpartitions);
opstring = mfs ?
"P:T:b:c:e:f:i:m:o:s:" :
"NO:S:T:b:c:e:f:g:h:i:m:o:qs:t:";
while ((ch = getopt(argc, argv, opstring)) != -1) {
switch (ch) {
case 'N':
Nflag = 1;
break;
case 'O':
Oflag = strtonum(optarg, 0, 2, &errstr);
if (errstr)
fatal("%s: invalid ffs version", optarg);
break;
case 'S':
sectorsize = strtonum(optarg, 1, INT_MAX, &errstr);
if (errstr)
fatal("sector size is %s: %s", errstr, optarg);
break;
case 'T':
disktype = optarg;
break;
case 'b':
bsize = strtonum(optarg, MINBSIZE, MAXBSIZE, &errstr);
if (errstr)
fatal("block size is %s: %s", errstr, optarg);
break;
case 'c':
maxfrgspercg = strtonum(optarg, 1, INT_MAX, &errstr);
if (errstr)
fatal("fragments per cylinder group is %s: %s",
errstr, optarg);
break;
case 'e':
maxbpg = strtonum(optarg, 1, INT_MAX, &errstr);
if (errstr)
fatal("blocks per file in a cylinder group is"
" %s: %s", errstr, optarg);
break;
case 'f':
fsize = strtonum(optarg, MINBSIZE / MAXFRAG, MAXBSIZE,
&errstr);
if (errstr)
fatal("fragment size is %s: %s",
errstr, optarg);
break;
case 'g':
avgfilesize = strtonum(optarg, 1, INT_MAX, &errstr);
if (errstr)
fatal("average file size is %s: %s",
errstr, optarg);
break;
case 'h':
avgfilesperdir = strtonum(optarg, 1, INT_MAX, &errstr);
if (errstr)
fatal("average files per dir is %s: %s",
errstr, optarg);
break;
case 'i':
density = strtonum(optarg, 1, INT_MAX, &errstr);
if (errstr)
fatal("bytes per inode is %s: %s",
errstr, optarg);
break;
case 'm':
minfree = strtonum(optarg, 0, 99, &errstr);
if (errstr)
fatal("free space %% is %s: %s",
errstr, optarg);
break;
case 'o':
if (mfs)
getmntopts(optarg, mopts, &mntflags);
else {
if (strcmp(optarg, "space") == 0)
reqopt = opt = FS_OPTSPACE;
else if (strcmp(optarg, "time") == 0)
reqopt = opt = FS_OPTTIME;
else
fatal("%s: unknown optimization "
"preference: use `space' or `time'.",
optarg);
}
break;
case 'q':
quiet = 1;
break;
case 's':
fssize = strtonum(optarg, 1, LLONG_MAX, &errstr);
if (errstr)
fatal("file system size is %s: %s",
errstr, optarg);
break;
case 't':
fstype = optarg;
if (strcmp(fstype, "ffs"))
ffsflag = 0;
break;
#ifdef MFS
case 'P':
pop = optarg;
break;
#endif
case '?':
default:
usage();
}
if (!ffsflag)
break;
}
argc -= optind;
argv += optind;
if (ffsflag && argc - mfs != 1)
usage();
/* Increase our data size to the max */
if (getrlimit(RLIMIT_DATA, &rl) == 0) {
rl.rlim_cur = rl.rlim_max;
(void)setrlimit(RLIMIT_DATA, &rl);
}
special = argv[0];
if (!mfs) {
char execname[MAXPATHLEN], name[MAXPATHLEN];
if (fstype == NULL)
fstype = readlabelfs(special, 0);
if (fstype != NULL && strcmp(fstype, "ffs")) {
snprintf(name, sizeof name, "newfs_%s", fstype);
saveargv[0] = name;
snprintf(execname, sizeof execname, "%s/newfs_%s",
_PATH_SBIN, fstype);
(void)execv(execname, saveargv);
snprintf(execname, sizeof execname, "%s/newfs_%s",
_PATH_USRSBIN, fstype);
(void)execv(execname, saveargv);
err(1, "%s not found", name);
}
}
if (mfs && !strcmp(special, "swap")) {
/*
* it's an MFS, mounted on "swap." fake up a label.
* XXX XXX XXX
*/
fso = -1; /* XXX; normally done below. */
memset(&mfsfakelabel, 0, sizeof(mfsfakelabel));
mfsfakelabel.d_secsize = 512;
mfsfakelabel.d_nsectors = 64;
mfsfakelabel.d_ntracks = 16;
mfsfakelabel.d_ncylinders = 16;
mfsfakelabel.d_secpercyl = 1024;
mfsfakelabel.d_secperunit = 16384;
mfsfakelabel.d_rpm = 3600;
mfsfakelabel.d_interleave = 1;
mfsfakelabel.d_npartitions = 1;
mfsfakelabel.d_version = 1;
DL_SETPSIZE(&mfsfakelabel.d_partitions[0], 16384);
mfsfakelabel.d_partitions[0].p_fragblock =
DISKLABELV1_FFS_FRAGBLOCK(1024, 8);
mfsfakelabel.d_partitions[0].p_cpg = 16;
lp = &mfsfakelabel;
pp = &mfsfakelabel.d_partitions[0];
goto havelabel;
}
cp = strrchr(special, '/');
if (cp == NULL) {
/*
* No path prefix; try /dev/r%s then /dev/%s.
*/
(void)snprintf(device, sizeof(device), "%sr%s",
_PATH_DEV, special);
if (stat(device, &st) == -1)
(void)snprintf(device, sizeof(device), "%s%s",
_PATH_DEV, special);
special = device;
}
if (Nflag) {
fso = -1;
} else {
fso = open(special, O_WRONLY);
if (fso < 0)
fatal("%s: %s", special, strerror(errno));
/* Bail if target special is mounted */
n = getmntinfo(&mp, MNT_NOWAIT);
if (n == 0)
fatal("%s: getmntinfo: %s", special, strerror(errno));
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)
fatal("%s is mounted on %s",
special, mp->f_mntonname);
++mp;
}
}
if (mfs && disktype != NULL) {
lp = (struct disklabel *)getdiskbyname(disktype);
if (lp == NULL)
fatal("%s: unknown disk type", disktype);
pp = &lp->d_partitions[1];
} else {
fsi = open(special, O_RDONLY);
if (fsi < 0)
fatal("%s: %s", special, strerror(errno));
if (fstat(fsi, &st) < 0)
fatal("%s: %s", special, strerror(errno));
if (!mfs) {
if (S_ISBLK(st.st_mode))
fatal("%s: block device", special);
if (!S_ISCHR(st.st_mode))
warnx("%s: not a character-special device",
special);
}
cp = strchr(argv[0], '\0') - 1;
if (cp == NULL || ((*cp < 'a' || *cp > ('a' + maxpartitions - 1))
&& !isdigit(*cp)))
fatal("%s: can't figure out file system partition",
argv[0]);
lp = getdisklabel(special, fsi);
if (isdigit(*cp))
pp = &lp->d_partitions[0];
else
pp = &lp->d_partitions[*cp - 'a'];
if (DL_GETPSIZE(pp) == 0)
fatal("%s: `%c' partition is unavailable",
argv[0], *cp);
if (pp->p_fstype == FS_BOOT)
fatal("%s: `%c' partition overlaps boot program",
argv[0], *cp);
}
havelabel:
if (fssize == 0)
fssize = DL_GETPSIZE(pp);
if (fssize > DL_GETPSIZE(pp) && !mfs)
fatal("%s: maximum file system size on the `%c' partition is %lld",
argv[0], *cp, DL_GETPSIZE(pp));
if (sectorsize == 0) {
sectorsize = lp->d_secsize;
if (sectorsize <= 0)
fatal("%s: no default sector size", argv[0]);
}
fssize *= sectorsize / DEV_BSIZE;
if (fsize == 0) {
fsize = DISKLABELV1_FFS_FSIZE(pp->p_fragblock);
if (fsize <= 0)
fsize = MAX(DFL_FRAGSIZE, lp->d_secsize);
}
if (bsize == 0) {
bsize = DISKLABELV1_FFS_BSIZE(pp->p_fragblock);
if (bsize <= 0)
bsize = MIN(DFL_BLKSIZE, 8 * fsize);
}
if (density == 0)
density = NFPI * fsize;
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) < 0)
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);
close(fsi);
#ifdef MFS
if (mfs) {
struct mfs_args args;
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;
switch (pid = fork()) {
case -1:
err(10, "mfs");
case 0:
snprintf(mountfromname, sizeof(mountfromname),
"mfs:%d", getpid());
break;
default:
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) < 0)
err(ECANCELED, "statfs %s", node);
if (!strcmp(sf.f_mntfromname, mountfromname) &&
!strncmp(sf.f_mntonname, node,
MNAMELEN) &&
!strcmp(sf.f_fstypename, "mfs")) {
if (pop != NULL)
copy(pop, node, &args);
exit(0);
}
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");
}
/* NOTREACHED */
}
(void) setsid();
(void) close(0);
(void) close(1);
(void) close(2);
(void) chdir("/");
args.fspec = mountfromname;
if (mntflags & MNT_RDONLY && pop != NULL)
mntflags &= ~MNT_RDONLY;
if (mount(MOUNT_MFS, node, mntflags, &args) < 0)
exit(errno); /* parent prints message */
}
#endif
exit(0);
}
char lmsg[] = "%s: can't read disk label; disk type must be specified";
struct disklabel *
getdisklabel(char *s, int fd)
{
static struct disklabel lab;
if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) {
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(lmsg, 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) < 0) {
warn("ioctl (WDINFO)");
fatal("%s: can't rewrite disk label", s);
}
#ifdef __vax__
if (lp->d_type == DTYPE_SMD && lp->d_flags & D_BADSECT) {
int i;
int cfd;
daddr64_t alt;
char specname[64];
char blk[1024];
char *cp;
/*
* Make name for 'c' partition.
*/
strncpy(specname, s, sizeof(specname) - 1);
specname[sizeof(specname) - 1] = '\0';
cp = specname + strlen(specname) - 1;
if (!isdigit(*cp))
*cp = 'c';
cfd = open(specname, O_WRONLY);
if (cfd < 0)
fatal("%s: %s", specname, strerror(errno));
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)
fatal("lseek to badsector area: %s",
strerror(errno));
if (write(cfd, blk, lp->d_secsize) != lp->d_secsize)
warn("alternate label %d write", i/2);
}
close(cfd);
}
#endif /*__vax__*/
}
/*VARARGS*/
void
fatal(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
if (fcntl(STDERR_FILENO, F_GETFL) < 0) {
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 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, struct mfs_args *args)
{
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) {
if (created && rmdir(mountpoint) != 0)
warn("rmdir %s", mountpoint);
if (unmount(dst, 0) != 0)
warn("unmount %s", dst);
err(1, "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);
}
if (mntflags & MNT_RDONLY) {
mntflags |= MNT_UPDATE;
if (mount(MOUNT_MFS, dst, mntflags, args) < 0) {
warn("%s: mount (update, rdonly)", dst);
if (unmount(dst, 0) != 0)
warn("unmount %s", dst);
exit(1);
}
}
}
static int
gettmpmnt(char *mountpoint, size_t len)
{
const char *tmp;
const char *mnt = _PATH_MNT;
struct statfs fs;
size_t n;
tmp = getenv("TMPDIR");
if (tmp == NULL || *tmp == '\0')
tmp = _PATH_TMP;
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 */