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Rick Macklem notes that NFS should get MNT_RDONLY and MNT_UPDATE
[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.
*
* %sccs.include.redist.c%
*/
#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 8.3 (Berkeley) %G%";
#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 KERBEROS
#include <kerberosIV/des.h>
#include <kerberosIV/krb.h>
#endif
#include <nfs/rpcv2.h>
#include <nfs/nfsv2.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"
struct mntopt mopts[] = {
MOPT_STDOPTS,
MOPT_FORCE,
MOPT_UPDATE,
{ NULL }
};
struct nfs_args nfsdefargs = {
(struct sockaddr *)0,
sizeof (struct sockaddr_in),
SOCK_DGRAM,
0,
(nfsv2fh_t *)0,
0,
NFS_WSIZE,
NFS_RSIZE,
NFS_TIMEO,
NFS_RETRANS,
NFS_MAXGRPS,
NFS_DEFRAHEAD,
NQ_DEFLEASE,
NQ_DEADTHRESH,
(char *)0,
};
struct nfhret {
u_long stat;
nfsv2fh_t nfh;
};
#define DEF_RETRY 10000
#define BGRND 1
#define ISBGRND 2
int retrycnt = DEF_RETRY;
int opflags = 0;
#ifdef KERBEROS
char inst[INST_SZ];
char realm[REALM_SZ];
KTEXT_ST kt;
#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, i, nfssvc_flag, num;
char *name, *p, *spec;
int error = 0;
#ifdef KERBEROS
uid_t last_ruid;
#endif
#ifdef KERBEROS
last_ruid = -1;
(void)strcpy(realm, KRB_REALM);
#endif
retrycnt = DEF_RETRY;
mntflags = 0;
nfsargs = nfsdefargs;
nfsargsp = &nfsargs;
while ((c = getopt(argc, argv,
"a:bcdD:g:iKklL:Mm:o:PpqR:r:sTt:w:x:")) != EOF)
switch (c) {
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':
nfsargsp->flags |= NFSMNT_INT;
break;
#ifdef KERBEROS
case 'K':
nfsargsp->flags |= NFSMNT_KERB;
break;
#endif
case 'k':
nfsargsp->flags |= NFSMNT_NQLOOKLEASE;
break;
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_RDIRALOOK;
break;
case 'M':
nfsargsp->flags |= NFSMNT_MYWRITE;
break;
#ifdef KERBEROS
case 'm':
(void)strncpy(realm, optarg, REALM_SZ - 1);
realm[REALM_SZ - 1] = '\0';
break;
#endif
case 'o':
getmntopts(optarg, mopts, &mntflags);
break;
case 'P':
nfsargsp->flags |= NFSMNT_RESVPORT;
break;
#ifdef ISO
case 'p':
nfsargsp->sotype = SOCK_SEQPACKET;
break;
#endif
case 'q':
nfsargsp->flags |= NFSMNT_NQNFS;
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;
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;
default:
usage();
break;
}
argc -= optind;
argv += optind;
if (argc != 2)
error = 1;
spec = *argv++;
name = *argv;
if (!getnfsargs(spec, nfsargsp))
exit(1);
if (mount(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 KERBEROS
/*
* 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.
*/
if (ncd.ncd_authuid != last_ruid) {
krb_set_tkt_string("");
last_ruid = ncd.ncd_authuid;
}
setreuid(ncd.ncd_authuid, 0);
if (krb_mk_req(&kt, "rcmd", inst, realm, 0) ==
KSUCCESS &&
kt.length <= (RPCAUTH_MAXSIZ - 2 * NFSX_UNSIGNED)) {
ncd.ncd_authtype = RPCAUTH_NQNFS;
ncd.ncd_authlen = kt.length;
ncd.ncd_authstr = (char *)kt.dat;
nfssvc_flag = NFSSVC_MNTD | NFSSVC_GOTAUTH;
}
setreuid(0, 0);
#endif /* KERBEROS */
}
}
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;
char *hostp, *delimp;
#ifdef KERBEROS
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);
}
bzero((caddr_t)&isoaddr, sizeof (isoaddr));
bcopy((caddr_t)isop, (caddr_t)&isoaddr.siso_addr,
sizeof (struct iso_addr));
isoaddr.siso_len = sizeof (isoaddr);
isoaddr.siso_family = AF_ISO;
isoaddr.siso_tlen = 2;
isoport = htons(NFS_PORT);
bcopy((caddr_t)&isoport, TSEL(&isoaddr), 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);
}
if ((nfsargsp->flags & NFSMNT_KERB) &&
(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);
}
} else if ((hp = gethostbyname(hostp)) == NULL) {
warnx("can't get net id for host");
return (0);
}
#ifdef KERBEROS
if (nfsargsp->flags & NFSMNT_KERB) {
strncpy(inst, hp->h_name, INST_SZ);
inst[INST_SZ - 1] = '\0';
if (cp = strchr(inst, '.'))
*cp = '\0';
}
#endif /* KERBEROS */
bcopy(hp->h_addr, (caddr_t)&saddr.sin_addr, hp->h_length);
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,
NFS_VER2, 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 ((clp = clntudp_create(&saddr, RPCPROG_MNT,
RPCMNT_VER1, pertry, &so)) == 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;
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);
warn("can't access %s", spec);
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->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;
struct nfhret *np;
{
if (!xdr_u_long(xdrsp, &(np->stat)))
return (0);
if (np->stat)
return (1);
return (xdr_opaque(xdrsp, (caddr_t)&(np->nfh), NFSX_FH));
}
__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.