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BSD 4_4_Lite2 release
[unix-history] / usr / src / sbin / mount_nfs / mount_nfs.c
/*
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
*
* 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.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1992, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)mount_nfs.c 8.11 (Berkeley) 5/4/95";
#endif /* not lint */
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/stat.h>
#include <sys/syslog.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include <rpc/pmap_prot.h>
#ifdef ISO
#include <netiso/iso.h>
#endif
#ifdef NFSKERB
#include <kerberosIV/des.h>
#include <kerberosIV/krb.h>
#endif
#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#define KERNEL
#include <nfs/nfs.h>
#undef KERNEL
#include <nfs/nqnfs.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <unistd.h>
#include "mntopts.h"
#define ALTF_BG 0x1
#define ALTF_NOCONN 0x2
#define ALTF_DUMBTIMR 0x4
#define ALTF_INTR 0x8
#define ALTF_KERB 0x10
#define ALTF_NFSV3 0x20
#define ALTF_RDIRPLUS 0x40
#define ALTF_MNTUDP 0x80
#define ALTF_RESVPORT 0x100
#define ALTF_SEQPACKET 0x200
#define ALTF_NQNFS 0x400
#define ALTF_SOFT 0x800
#define ALTF_TCP 0x1000
struct mntopt mopts[] = {
MOPT_STDOPTS,
MOPT_FORCE,
MOPT_UPDATE,
{ "bg", 0, ALTF_BG, 1 },
{ "conn", 1, ALTF_NOCONN, 1 },
{ "dumbtimer", 0, ALTF_DUMBTIMR, 1 },
{ "intr", 0, ALTF_INTR, 1 },
#ifdef NFSKERB
{ "kerb", 0, ALTF_KERB, 1 },
#endif
{ "nfsv3", 0, ALTF_NFSV3, 1 },
{ "rdirplus", 0, ALTF_RDIRPLUS, 1 },
{ "mntudp", 0, ALTF_MNTUDP, 1 },
{ "resvport", 0, ALTF_RESVPORT, 1 },
#ifdef ISO
{ "seqpacket", 0, ALTF_SEQPACKET, 1 },
#endif
{ "nqnfs", 0, ALTF_NQNFS, 1 },
{ "soft", 0, ALTF_SOFT, 1 },
{ "tcp", 0, ALTF_TCP, 1 },
{ NULL }
};
struct nfs_args nfsdefargs = {
NFS_ARGSVERSION,
(struct sockaddr *)0,
sizeof (struct sockaddr_in),
SOCK_DGRAM,
0,
(u_char *)0,
0,
0,
NFS_WSIZE,
NFS_RSIZE,
NFS_READDIRSIZE,
10,
NFS_RETRANS,
NFS_MAXGRPS,
NFS_DEFRAHEAD,
NQ_DEFLEASE,
NQ_DEADTHRESH,
(char *)0,
};
struct nfhret {
u_long stat;
long vers;
long auth;
long fhsize;
u_char nfh[NFSX_V3FHMAX];
};
#define DEF_RETRY 10000
#define BGRND 1
#define ISBGRND 2
int retrycnt = DEF_RETRY;
int opflags = 0;
int nfsproto = IPPROTO_UDP;
int mnttcp_ok = 1;
#ifdef NFSKERB
char inst[INST_SZ];
char realm[REALM_SZ];
struct {
u_long kind;
KTEXT_ST kt;
} ktick;
struct nfsrpc_nickverf kverf;
struct nfsrpc_fullblock kin, kout;
NFSKERBKEY_T kivec;
CREDENTIALS kcr;
struct timeval ktv;
NFSKERBKEYSCHED_T kerb_keysched;
#endif
int getnfsargs __P((char *, struct nfs_args *));
#ifdef ISO
struct iso_addr *iso_addr __P((const char *));
#endif
void set_rpc_maxgrouplist __P((int));
__dead void usage __P((void));
int xdr_dir __P((XDR *, char *));
int xdr_fh __P((XDR *, struct nfhret *));
int
main(argc, argv)
int argc;
char *argv[];
{
register int c;
register struct nfs_args *nfsargsp;
struct nfs_args nfsargs;
struct nfsd_cargs ncd;
int mntflags, altflags, i, nfssvc_flag, num;
char *name, *p, *spec;
int error = 0;
#ifdef NFSKERB
uid_t last_ruid;
last_ruid = -1;
(void)strcpy(realm, KRB_REALM);
if (sizeof (struct nfsrpc_nickverf) != RPCX_NICKVERF ||
sizeof (struct nfsrpc_fullblock) != RPCX_FULLBLOCK ||
((char *)&ktick.kt) - ((char *)&ktick) != NFSX_UNSIGNED ||
((char *)ktick.kt.dat) - ((char *)&ktick) != 2 * NFSX_UNSIGNED)
fprintf(stderr, "Yikes! NFSKERB structs not packed!!\n");
#endif /* NFSKERB */
retrycnt = DEF_RETRY;
mntflags = 0;
altflags = 0;
nfsargs = nfsdefargs;
nfsargsp = &nfsargs;
while ((c = getopt(argc, argv,
"3a:bcdD:g:I:iKL:lm:o:PpqR:r:sTt:w:x:U")) != EOF)
switch (c) {
case '3':
nfsargsp->flags |= NFSMNT_NFSV3;
break;
case 'a':
num = strtol(optarg, &p, 10);
if (*p || num < 0)
errx(1, "illegal -a value -- %s", optarg);
nfsargsp->readahead = num;
nfsargsp->flags |= NFSMNT_READAHEAD;
break;
case 'b':
opflags |= BGRND;
break;
case 'c':
nfsargsp->flags |= NFSMNT_NOCONN;
break;
case 'D':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -D value -- %s", optarg);
nfsargsp->deadthresh = num;
nfsargsp->flags |= NFSMNT_DEADTHRESH;
break;
case 'd':
nfsargsp->flags |= NFSMNT_DUMBTIMR;
break;
case 'g':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -g value -- %s", optarg);
set_rpc_maxgrouplist(num);
nfsargsp->maxgrouplist = num;
nfsargsp->flags |= NFSMNT_MAXGRPS;
break;
case 'I':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -I value -- %s", optarg);
nfsargsp->readdirsize = num;
nfsargsp->flags |= NFSMNT_READDIRSIZE;
break;
case 'i':
nfsargsp->flags |= NFSMNT_INT;
break;
#ifdef NFSKERB
case 'K':
nfsargsp->flags |= NFSMNT_KERB;
break;
#endif
case 'L':
num = strtol(optarg, &p, 10);
if (*p || num < 2)
errx(1, "illegal -L value -- %s", optarg);
nfsargsp->leaseterm = num;
nfsargsp->flags |= NFSMNT_LEASETERM;
break;
case 'l':
nfsargsp->flags |= NFSMNT_RDIRPLUS;
break;
#ifdef NFSKERB
case 'm':
(void)strncpy(realm, optarg, REALM_SZ - 1);
realm[REALM_SZ - 1] = '\0';
break;
#endif
case 'o':
getmntopts(optarg, mopts, &mntflags, &altflags);
if(altflags & ALTF_BG)
opflags |= BGRND;
if(altflags & ALTF_NOCONN)
nfsargsp->flags |= NFSMNT_NOCONN;
if(altflags & ALTF_DUMBTIMR)
nfsargsp->flags |= NFSMNT_DUMBTIMR;
if(altflags & ALTF_INTR)
nfsargsp->flags |= NFSMNT_INT;
#ifdef NFSKERB
if(altflags & ALTF_KERB)
nfsargsp->flags |= NFSMNT_KERB;
#endif
if(altflags & ALTF_NFSV3)
nfsargsp->flags |= NFSMNT_NFSV3;
if(altflags & ALTF_RDIRPLUS)
nfsargsp->flags |= NFSMNT_RDIRPLUS;
if(altflags & ALTF_MNTUDP)
mnttcp_ok = 0;
if(altflags & ALTF_RESVPORT)
nfsargsp->flags |= NFSMNT_RESVPORT;
#ifdef ISO
if(altflags & ALTF_SEQPACKET)
nfsargsp->sotype = SOCK_SEQPACKET;
#endif
if(altflags & ALTF_NQNFS)
nfsargsp->flags |= (NFSMNT_NQNFS|NFSMNT_NFSV3);
if(altflags & ALTF_SOFT)
nfsargsp->flags |= NFSMNT_SOFT;
if(altflags & ALTF_TCP) {
nfsargsp->sotype = SOCK_STREAM;
nfsproto = IPPROTO_TCP;
}
altflags = 0;
break;
case 'P':
nfsargsp->flags |= NFSMNT_RESVPORT;
break;
#ifdef ISO
case 'p':
nfsargsp->sotype = SOCK_SEQPACKET;
break;
#endif
case 'q':
nfsargsp->flags |= (NFSMNT_NQNFS | NFSMNT_NFSV3);
break;
case 'R':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -R value -- %s", optarg);
retrycnt = num;
break;
case 'r':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -r value -- %s", optarg);
nfsargsp->rsize = num;
nfsargsp->flags |= NFSMNT_RSIZE;
break;
case 's':
nfsargsp->flags |= NFSMNT_SOFT;
break;
case 'T':
nfsargsp->sotype = SOCK_STREAM;
nfsproto = IPPROTO_TCP;
break;
case 't':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -t value -- %s", optarg);
nfsargsp->timeo = num;
nfsargsp->flags |= NFSMNT_TIMEO;
break;
case 'w':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -w value -- %s", optarg);
nfsargsp->wsize = num;
nfsargsp->flags |= NFSMNT_WSIZE;
break;
case 'x':
num = strtol(optarg, &p, 10);
if (*p || num <= 0)
errx(1, "illegal -x value -- %s", optarg);
nfsargsp->retrans = num;
nfsargsp->flags |= NFSMNT_RETRANS;
break;
case 'U':
mnttcp_ok = 0;
break;
default:
usage();
break;
}
argc -= optind;
argv += optind;
if (argc != 2) {
usage();
/* NOTREACHED */
}
spec = *argv++;
name = *argv;
if (!getnfsargs(spec, nfsargsp))
exit(1);
if (mount("nfs", name, mntflags, nfsargsp))
err(1, "%s", name);
if (nfsargsp->flags & (NFSMNT_NQNFS | NFSMNT_KERB)) {
if ((opflags & ISBGRND) == 0) {
if (i = fork()) {
if (i == -1)
err(1, "nqnfs 1");
exit(0);
}
(void) setsid();
(void) close(STDIN_FILENO);
(void) close(STDOUT_FILENO);
(void) close(STDERR_FILENO);
(void) chdir("/");
}
openlog("mount_nfs:", LOG_PID, LOG_DAEMON);
nfssvc_flag = NFSSVC_MNTD;
ncd.ncd_dirp = name;
while (nfssvc(nfssvc_flag, (caddr_t)&ncd) < 0) {
if (errno != ENEEDAUTH) {
syslog(LOG_ERR, "nfssvc err %m");
continue;
}
nfssvc_flag =
NFSSVC_MNTD | NFSSVC_GOTAUTH | NFSSVC_AUTHINFAIL;
#ifdef NFSKERB
/*
* Set up as ncd_authuid for the kerberos call.
* Must set ruid to ncd_authuid and reset the
* ticket name iff ncd_authuid is not the same
* as last time, so that the right ticket file
* is found.
* Get the Kerberos credential structure so that
* we have the seesion key and get a ticket for
* this uid.
* For more info see the IETF Draft "Authentication
* in ONC RPC".
*/
if (ncd.ncd_authuid != last_ruid) {
krb_set_tkt_string("");
last_ruid = ncd.ncd_authuid;
}
setreuid(ncd.ncd_authuid, 0);
kret = krb_get_cred(NFS_KERBSRV, inst, realm, &kcr);
if (kret == RET_NOTKT) {
kret = get_ad_tkt(NFS_KERBSRV, inst, realm,
DEFAULT_TKT_LIFE);
if (kret == KSUCCESS)
kret = krb_get_cred(NFS_KERBSRV, inst, realm,
&kcr);
}
if (kret == KSUCCESS)
kret = krb_mk_req(&ktick.kt, NFS_KERBSRV, inst,
realm, 0);
/*
* Fill in the AKN_FULLNAME authenticator and verfier.
* Along with the Kerberos ticket, we need to build
* the timestamp verifier and encrypt it in CBC mode.
*/
if (kret == KSUCCESS &&
ktick.kt.length <= (RPCAUTH_MAXSIZ-3*NFSX_UNSIGNED)
&& gettimeofday(&ktv, (struct timezone *)0) == 0) {
ncd.ncd_authtype = RPCAUTH_KERB4;
ncd.ncd_authstr = (u_char *)&ktick;
ncd.ncd_authlen = nfsm_rndup(ktick.kt.length) +
3 * NFSX_UNSIGNED;
ncd.ncd_verfstr = (u_char *)&kverf;
ncd.ncd_verflen = sizeof (kverf);
memmove(ncd.ncd_key, kcr.session,
sizeof (kcr.session));
kin.t1 = htonl(ktv.tv_sec);
kin.t2 = htonl(ktv.tv_usec);
kin.w1 = htonl(NFS_KERBTTL);
kin.w2 = htonl(NFS_KERBTTL - 1);
bzero((caddr_t)kivec, sizeof (kivec));
/*
* Encrypt kin in CBC mode using the session
* key in kcr.
*/
XXX
/*
* Finally, fill the timestamp verifier into the
* authenticator and verifier.
*/
ktick.kind = htonl(RPCAKN_FULLNAME);
kverf.kind = htonl(RPCAKN_FULLNAME);
NFS_KERBW1(ktick.kt) = kout.w1;
ktick.kt.length = htonl(ktick.kt.length);
kverf.verf.t1 = kout.t1;
kverf.verf.t2 = kout.t2;
kverf.verf.w2 = kout.w2;
nfssvc_flag = NFSSVC_MNTD | NFSSVC_GOTAUTH;
}
setreuid(0, 0);
#endif /* NFSKERB */
}
}
exit(0);
}
int
getnfsargs(spec, nfsargsp)
char *spec;
struct nfs_args *nfsargsp;
{
register CLIENT *clp;
struct hostent *hp;
static struct sockaddr_in saddr;
#ifdef ISO
static struct sockaddr_iso isoaddr;
struct iso_addr *isop;
int isoflag = 0;
#endif
struct timeval pertry, try;
enum clnt_stat clnt_stat;
int so = RPC_ANYSOCK, i, nfsvers, mntvers;
char *hostp, *delimp;
#ifdef NFSKERB
char *cp;
#endif
u_short tport;
static struct nfhret nfhret;
static char nam[MNAMELEN + 1];
strncpy(nam, spec, MNAMELEN);
nam[MNAMELEN] = '\0';
if ((delimp = strchr(spec, '@')) != NULL) {
hostp = delimp + 1;
} else if ((delimp = strchr(spec, ':')) != NULL) {
hostp = spec;
spec = delimp + 1;
} else {
warnx("no <host>:<dirpath> or <dirpath>@<host> spec");
return (0);
}
*delimp = '\0';
/*
* DUMB!! Until the mount protocol works on iso transport, we must
* supply both an iso and an inet address for the host.
*/
#ifdef ISO
if (!strncmp(hostp, "iso=", 4)) {
u_short isoport;
hostp += 4;
isoflag++;
if ((delimp = strchr(hostp, '+')) == NULL) {
warnx("no iso+inet address");
return (0);
}
*delimp = '\0';
if ((isop = iso_addr(hostp)) == NULL) {
warnx("bad ISO address");
return (0);
}
memset(&isoaddr, 0, sizeof (isoaddr));
memmove(&isoaddr.siso_addr, isop, sizeof (struct iso_addr));
isoaddr.siso_len = sizeof (isoaddr);
isoaddr.siso_family = AF_ISO;
isoaddr.siso_tlen = 2;
isoport = htons(NFS_PORT);
memmove(TSEL(&isoaddr), &isoport, isoaddr.siso_tlen);
hostp = delimp + 1;
}
#endif /* ISO */
/*
* Handle an internet host address and reverse resolve it if
* doing Kerberos.
*/
if (isdigit(*hostp)) {
if ((saddr.sin_addr.s_addr = inet_addr(hostp)) == -1) {
warnx("bad net address %s", hostp);
return (0);
}
} else if ((hp = gethostbyname(hostp)) != NULL)
memmove(&saddr.sin_addr, hp->h_addr, hp->h_length);
else {
warnx("can't get net id for host");
return (0);
}
#ifdef NFSKERB
if ((nfsargsp->flags & NFSMNT_KERB)) {
if ((hp = gethostbyaddr((char *)&saddr.sin_addr.s_addr,
sizeof (u_long), AF_INET)) == (struct hostent *)0) {
warnx("can't reverse resolve net address");
return (0);
}
memmove(&saddr.sin_addr, hp->h_addr, hp->h_length);
strncpy(inst, hp->h_name, INST_SZ);
inst[INST_SZ - 1] = '\0';
if (cp = strchr(inst, '.'))
*cp = '\0';
}
#endif /* NFSKERB */
if (nfsargsp->flags & NFSMNT_NFSV3) {
nfsvers = 3;
mntvers = 3;
} else {
nfsvers = 2;
mntvers = 1;
}
nfhret.stat = EACCES; /* Mark not yet successful */
while (retrycnt > 0) {
saddr.sin_family = AF_INET;
saddr.sin_port = htons(PMAPPORT);
if ((tport = pmap_getport(&saddr, RPCPROG_NFS,
nfsvers, nfsproto)) == 0) {
if ((opflags & ISBGRND) == 0)
clnt_pcreateerror("NFS Portmap");
} else {
saddr.sin_port = 0;
pertry.tv_sec = 10;
pertry.tv_usec = 0;
if (mnttcp_ok && nfsargsp->sotype == SOCK_STREAM)
clp = clnttcp_create(&saddr, RPCPROG_MNT, mntvers,
&so, 0, 0);
else
clp = clntudp_create(&saddr, RPCPROG_MNT, mntvers,
pertry, &so);
if (clp == NULL) {
if ((opflags & ISBGRND) == 0)
clnt_pcreateerror("Cannot MNT PRC");
} else {
clp->cl_auth = authunix_create_default();
try.tv_sec = 10;
try.tv_usec = 0;
if (nfsargsp->flags & NFSMNT_KERB)
nfhret.auth = RPCAUTH_KERB4;
else
nfhret.auth = RPCAUTH_UNIX;
nfhret.vers = mntvers;
clnt_stat = clnt_call(clp, RPCMNT_MOUNT,
xdr_dir, spec, xdr_fh, &nfhret, try);
if (clnt_stat != RPC_SUCCESS) {
if ((opflags & ISBGRND) == 0)
warnx("%s", clnt_sperror(clp,
"bad MNT RPC"));
} else {
auth_destroy(clp->cl_auth);
clnt_destroy(clp);
retrycnt = 0;
}
}
}
if (--retrycnt > 0) {
if (opflags & BGRND) {
opflags &= ~BGRND;
if (i = fork()) {
if (i == -1)
err(1, "nqnfs 2");
exit(0);
}
(void) setsid();
(void) close(STDIN_FILENO);
(void) close(STDOUT_FILENO);
(void) close(STDERR_FILENO);
(void) chdir("/");
opflags |= ISBGRND;
}
sleep(60);
}
}
if (nfhret.stat) {
if (opflags & ISBGRND)
exit(1);
warnx("can't access %s: %s", spec, strerror(nfhret.stat));
return (0);
}
saddr.sin_port = htons(tport);
#ifdef ISO
if (isoflag) {
nfsargsp->addr = (struct sockaddr *) &isoaddr;
nfsargsp->addrlen = sizeof (isoaddr);
} else
#endif /* ISO */
{
nfsargsp->addr = (struct sockaddr *) &saddr;
nfsargsp->addrlen = sizeof (saddr);
}
nfsargsp->fh = nfhret.nfh;
nfsargsp->fhsize = nfhret.fhsize;
nfsargsp->hostname = nam;
return (1);
}
/*
* xdr routines for mount rpc's
*/
int
xdr_dir(xdrsp, dirp)
XDR *xdrsp;
char *dirp;
{
return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
}
int
xdr_fh(xdrsp, np)
XDR *xdrsp;
register struct nfhret *np;
{
register int i;
long auth, authcnt, authfnd = 0;
if (!xdr_u_long(xdrsp, &np->stat))
return (0);
if (np->stat)
return (1);
switch (np->vers) {
case 1:
np->fhsize = NFSX_V2FH;
return (xdr_opaque(xdrsp, (caddr_t)np->nfh, NFSX_V2FH));
case 3:
if (!xdr_long(xdrsp, &np->fhsize))
return (0);
if (np->fhsize <= 0 || np->fhsize > NFSX_V3FHMAX)
return (0);
if (!xdr_opaque(xdrsp, (caddr_t)np->nfh, np->fhsize))
return (0);
if (!xdr_long(xdrsp, &authcnt))
return (0);
for (i = 0; i < authcnt; i++) {
if (!xdr_long(xdrsp, &auth))
return (0);
if (auth == np->auth)
authfnd++;
}
/*
* Some servers, such as DEC's OSF/1 return a nil authenticator
* list to indicate RPCAUTH_UNIX.
*/
if (!authfnd && (authcnt > 0 || np->auth != RPCAUTH_UNIX))
np->stat = EAUTH;
return (1);
};
return (0);
}
__dead void
usage()
{
(void)fprintf(stderr, "usage: mount_nfs %s\n%s\n%s\n%s\n",
"[-bcdiKklMPqsT] [-a maxreadahead] [-D deadthresh]",
"\t[-g maxgroups] [-L leaseterm] [-m realm] [-o options] [-R retrycnt]",
"\t[-r readsize] [-t timeout] [-w writesize] [-x retrans]",
"\trhost:path node");
exit(1);
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.