OpenBSD-4.6/sbin/mount_nfs/mount_nfs.c
/* $OpenBSD: mount_nfs.c,v 1.48 2009/05/12 23:25:08 thib Exp $ */
/* $NetBSD: mount_nfs.c,v 1.12.4.1 1996/05/25 22:48:05 fvdl Exp $ */
/*
* 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. 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
#if 0
static char sccsid[] = "@(#)mount_nfs.c 8.11 (Berkeley) 5/4/95";
#else
static char rcsid[] = "$NetBSD: mount_nfs.c,v 1.12.4.1 1996/05/25 22:48:05 fvdl Exp $";
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/stat.h>
#include <syslog.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include <rpc/pmap_prot.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfs/nfs.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 <string.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_NFSV3 0x20
#define ALTF_RDIRPLUS 0x40
#define ALTF_MNTUDP 0x80
#define ALTF_RESVPORT 0x100
#define ALTF_SEQPACKET 0x200
#define ALTF_SOFT 0x800
#define ALTF_TCP 0x1000
#define ALTF_PORT 0x2000
#define ALTF_NFSV2 0x4000
#define ALTF_NOAC 0x8000
#define ALTF_ACREGMIN 0x10000
#define ALTF_ACREGMAX 0x20000
#define ALTF_ACDIRMIN 0x40000
#define ALTF_ACDIRMAX 0x80000
const struct mntopt mopts[] = {
MOPT_STDOPTS,
MOPT_FORCE,
MOPT_UPDATE,
MOPT_SYNC,
{ "bg", ALTF_BG, 0 },
{ "conn", ALTF_NOCONN, MFLAG_INVERSE },
{ "dumbtimer", ALTF_DUMBTIMR, 0 },
{ "intr", ALTF_INTR, 0 },
{ "nfsv3", ALTF_NFSV3, 0 },
{ "rdirplus", ALTF_RDIRPLUS, 0 },
{ "mntudp", ALTF_MNTUDP, 0 },
{ "resvport", ALTF_RESVPORT, 0 },
{ "soft", ALTF_SOFT, 0 },
{ "tcp", ALTF_TCP, 0 },
{ "port", ALTF_PORT, MFLAG_INTVAL },
{ "nfsv2", ALTF_NFSV2, 0 },
{ "ac", ALTF_NOAC, MFLAG_INVERSE },
{ "acregmin", ALTF_ACREGMIN, MFLAG_INTVAL },
{ "acregmax", ALTF_ACREGMAX, MFLAG_INTVAL },
{ "acdirmin", ALTF_ACDIRMIN, MFLAG_INTVAL },
{ "acdirmax", ALTF_ACDIRMAX, MFLAG_INTVAL },
{ NULL }
};
struct nfs_args nfsdefargs = {
NFS_ARGSVERSION,
NULL,
sizeof (struct sockaddr_in),
SOCK_DGRAM,
0,
NULL,
0,
NFSMNT_NFSV3,
NFS_WSIZE,
NFS_RSIZE,
NFS_READDIRSIZE,
10,
NFS_RETRANS,
NFS_MAXGRPS,
NFS_DEFRAHEAD,
0,
0,
NULL,
0,
0,
0,
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;
int opflags = 0;
int nfsproto = IPPROTO_UDP;
int mnttcp_ok = 1;
u_short port_no = 0;
int force2 = 0;
int force3 = 0;
int getnfsargs(char *, struct nfs_args *);
void set_rpc_maxgrouplist(int);
__dead void usage(void);
int xdr_dir(XDR *, char *);
int xdr_fh(XDR *, struct nfhret *);
int
main(int argc, char *argv[])
{
int c;
struct nfs_args *nfsargsp;
struct nfs_args nfsargs;
int mntflags, num;
char name[MAXPATHLEN], *options = NULL, *spec;
const char *p;
union mntval value;
retrycnt = DEF_RETRY;
mntflags = 0;
nfsargs = nfsdefargs;
nfsargsp = &nfsargs;
while ((c = getopt(argc, argv,
"23a:bcdD:g:I:iL:lo:PR:r:sTt:w:x:U")) != -1)
switch (c) {
case '3':
if (force2)
errx(1, "-2 and -3 are mutually exclusive");
force3 = 1;
break;
case '2':
if (force3)
errx(1, "-2 and -3 are mutually exclusive");
force2 = 1;
nfsargsp->flags &= ~NFSMNT_NFSV3;
break;
case 'a':
num = (int) strtonum(optarg, 0, 4, &p);
if (p)
errx(1, "illegal -a value %s: %s", optarg, p);
nfsargsp->readahead = num;
nfsargsp->flags |= NFSMNT_READAHEAD;
break;
case 'b':
opflags |= BGRND;
break;
case 'c':
nfsargsp->flags |= NFSMNT_NOCONN;
break;
case 'D':
/* backward compatibility */
break;
case 'd':
nfsargsp->flags |= NFSMNT_DUMBTIMR;
break;
case 'g':
num = (int) strtonum(optarg, 1, NGROUPS_MAX, &p);
if (p)
errx(1, "illegal -g value %s: %s", optarg, p);
set_rpc_maxgrouplist(num);
nfsargsp->maxgrouplist = num;
nfsargsp->flags |= NFSMNT_MAXGRPS;
break;
case 'I':
num = (int) strtonum(optarg, 1, INT_MAX, &p);
if (p)
errx(1, "illegal -I value %s: %s", optarg, p);
nfsargsp->readdirsize = num;
nfsargsp->flags |= NFSMNT_READDIRSIZE;
break;
case 'i':
nfsargsp->flags |= NFSMNT_INT;
break;
case 'L':
/* backward compatibility */
break;
case 'l':
nfsargsp->flags |= NFSMNT_RDIRPLUS;
break;
case 'o':
options = optarg;
while (options != NULL) {
switch (getmntopt(&options, &value, mopts,
&mntflags)) {
case ALTF_BG:
opflags |= BGRND;
break;
case ALTF_NOCONN:
nfsargsp->flags |= NFSMNT_NOCONN;
break;
case ALTF_DUMBTIMR:
nfsargsp->flags |= NFSMNT_DUMBTIMR;
break;
case ALTF_INTR:
nfsargsp->flags |= NFSMNT_INT;
break;
case ALTF_NFSV3:
if (force2)
errx(1,
"conflicting version options");
force3 = 1;
break;
case ALTF_NFSV2:
if (force3)
errx(1,
"conflicting version options");
force2 = 1;
nfsargsp->flags &= ~NFSMNT_NFSV3;
break;
case ALTF_RDIRPLUS:
nfsargsp->flags |= NFSMNT_RDIRPLUS;
break;
case ALTF_MNTUDP:
mnttcp_ok = 0;
break;
case ALTF_RESVPORT:
nfsargsp->flags |= NFSMNT_RESVPORT;
break;
case ALTF_SOFT:
nfsargsp->flags |= NFSMNT_SOFT;
break;
case ALTF_TCP:
nfsargsp->sotype = SOCK_STREAM;
nfsproto = IPPROTO_TCP;
break;
case ALTF_PORT:
port_no = value.ival;
break;
case ALTF_NOAC:
nfsargsp->flags |= (NFSMNT_ACREGMIN |
NFSMNT_ACREGMAX | NFSMNT_ACDIRMIN |
NFSMNT_ACDIRMAX);
nfsargsp->acregmin = 0;
nfsargsp->acregmax = 0;
nfsargsp->acdirmin = 0;
nfsargsp->acdirmax = 0;
break;
case ALTF_ACREGMIN:
nfsargsp->flags |= NFSMNT_ACREGMIN;
nfsargsp->acregmin = value.ival;
break;
case ALTF_ACREGMAX:
nfsargsp->flags |= NFSMNT_ACREGMAX;
nfsargsp->acregmax = value.ival;
break;
case ALTF_ACDIRMIN:
nfsargsp->flags |= NFSMNT_ACDIRMIN;
nfsargsp->acdirmin = value.ival;
break;
case ALTF_ACDIRMAX:
nfsargsp->flags |= NFSMNT_ACDIRMAX;
nfsargsp->acdirmax = value.ival;
break;
}
}
break;
case 'P':
/* backward compatibility */
break;
case 'R':
num = (int) strtonum(optarg, 1, INT_MAX, &p);
if (p)
errx(1, "illegal -R value %s: %s", optarg, p);
retrycnt = num;
break;
case 'r':
num = (int) strtonum(optarg, 1, INT_MAX, &p);
if (p)
errx(1, "illegal -r value %s: %s", optarg, p);
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 = (int) strtonum(optarg, 1, INT_MAX, &p);
if (p)
errx(1, "illegal -t value %s: %s", optarg, p);
nfsargsp->timeo = num;
nfsargsp->flags |= NFSMNT_TIMEO;
break;
case 'w':
num = (int) strtonum(optarg, 1, INT_MAX, &p);
if (p)
errx(1, "illegal -w value %s: %s", optarg, p);
nfsargsp->wsize = num;
nfsargsp->flags |= NFSMNT_WSIZE;
break;
case 'x':
num = (int) strtonum(optarg, 1, INT_MAX, &p);
if (p)
errx(1, "illegal -x value %s: %s", optarg, p);
nfsargsp->retrans = num;
nfsargsp->flags |= NFSMNT_RETRANS;
break;
case 'U':
mnttcp_ok = 0;
break;
default:
usage();
/* NOTREACHED */
}
argc -= optind;
argv += optind;
if (argc != 2)
usage();
spec = *argv++;
if (realpath(*argv, name) == NULL)
err(1, "realpath %s", *argv);
if (!getnfsargs(spec, nfsargsp))
exit(1);
if (mount(MOUNT_NFS, name, mntflags, nfsargsp)) {
if (errno == EOPNOTSUPP)
errx(1, "%s: Filesystem not supported by kernel", name);
else
err(1, "%s", name);
}
exit(0);
}
int
getnfsargs(char *spec, struct nfs_args *nfsargsp)
{
CLIENT *clp;
struct hostent *hp;
static struct sockaddr_in saddr;
struct timeval pertry, try;
enum clnt_stat clnt_stat;
int so = RPC_ANYSOCK, i, nfsvers, mntvers, orgcnt;
char *hostp, *delimp;
u_short tport;
static struct nfhret nfhret;
static char nam[MNAMELEN + 1];
if (strlcpy(nam, spec, sizeof(nam)) >= sizeof(nam)) {
errx(1, "hostname too long");
}
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';
/*
* Handle an internet host address
*/
if (inet_aton(hostp, &saddr.sin_addr) == 0) {
hp = gethostbyname(hostp);
if (hp == NULL) {
warnx("can't resolve address for host %s", hostp);
return (0);
}
memcpy(&saddr.sin_addr, hp->h_addr, hp->h_length);
}
if (force2) {
nfsvers = NFS_VER2;
mntvers = RPCMNT_VER1;
} else {
nfsvers = NFS_VER3;
mntvers = RPCMNT_VER3;
}
orgcnt = retrycnt;
tryagain:
nfhret.stat = EACCES; /* Mark not yet successful */
while (retrycnt > 0) {
saddr.sin_family = AF_INET;
saddr.sin_port = htons(PMAPPORT);
if ((tport = port_no ? port_no : pmap_getport(&saddr,
RPCPROG_NFS, nfsvers, nfsargsp->sotype == SOCK_STREAM ?
IPPROTO_TCP : IPPROTO_UDP)) == 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;
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 (clnt_stat == RPC_PROGVERSMISMATCH) {
if (nfsvers == NFS_VER3 &&
!force3) {
retrycnt = orgcnt;
nfsvers = NFS_VER2;
mntvers = RPCMNT_VER1;
nfsargsp->flags &=
~NFSMNT_NFSV3;
goto tryagain;
} else {
warnx("%s",
clnt_sperror(clp,
"MNT RPC"));
}
}
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, "fork");
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);
errno = nfhret.stat;
warnx("can't access %s: %s", spec, strerror(nfhret.stat));
return (0);
}
saddr.sin_port = htons(tport);
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(XDR *xdrsp, char *dirp)
{
return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
}
int
xdr_fh(XDR *xdrsp, struct nfhret *np)
{
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)
{
extern char *__progname;
(void)fprintf(stderr,
"usage: %s [-23bcdilsTU] [-a maxreadahead] [-g maxgroups]\n"
"\t[-I readdirsize] [-o options] [-R retrycnt] [-r readsize]\n"
"\t[-t timeout] [-w writesize] [-x retrans] rhost:path node\n",
__progname);
exit(1);
}