737 lines
19 KiB
C
737 lines
19 KiB
C
/* $Id: mount_nfs.c,v 1.5 2003/11/05 14:58:58 rees Exp $ */
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/*
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* copyright (c) 2003
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* the regents of the university of michigan
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* all rights reserved
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*
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* permission is granted to use, copy, create derivative works and redistribute
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* this software and such derivative works for any purpose, so long as the name
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* of the university of michigan is not used in any advertising or publicity
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* pertaining to the use or distribution of this software without specific,
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* written prior authorization. if the above copyright notice or any other
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* identification of the university of michigan is included in any copy of any
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* portion of this software, then the disclaimer below must also be included.
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*
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* this software is provided as is, without representation from the university
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* of michigan as to its fitness for any purpose, and without warranty by the
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* university of michigan of any kind, either express or implied, including
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* without limitation the implied warranties of merchantability and fitness for
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* a particular purpose. the regents of the university of michigan shall not be
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* liable for any damages, including special, indirect, incidental, or
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* consequential damages, with respect to any claim arising out of or in
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* connection with the use of the software, even if it has been or is hereafter
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* advised of the possibility of such damages.
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*/
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/*
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* Copyright (c) 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Rick Macklem at The University of Guelph.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1992, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)mount_nfs.c 8.11 (Berkeley) 5/4/95";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/syslog.h>
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#include <rpc/rpc.h>
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#include <rpc/pmap_clnt.h>
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#include <rpc/pmap_prot.h>
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#include <nfs/rpcv2.h>
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#include <nfs/nfsproto.h>
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#include <nfsclient/nfs.h>
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#include <nfsclient/nfsargs.h>
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#include <arpa/inet.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <strings.h>
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#include <sysexits.h>
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#include <unistd.h>
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#include "mntopts.h"
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#include "mounttab.h"
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#define ALTF_BG 0x1
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#define ALTF_NOCONN 0x2
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#define ALTF_DUMBTIMR 0x4
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#define ALTF_INTR 0x8
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#define ALTF_NFSV3 0x20
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#define ALTF_RDIRPLUS 0x40
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#define ALTF_MNTUDP 0x80
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#define ALTF_RESVPORT 0x100
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#define ALTF_SEQPACKET 0x200
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#define ALTF_SOFT 0x800
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#define ALTF_TCP 0x1000
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#define ALTF_PORT 0x2000
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#define ALTF_NFSV2 0x4000
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#define ALTF_ACREGMIN 0x8000
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#define ALTF_ACREGMAX 0x10000
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#define ALTF_ACDIRMIN 0x20000
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#define ALTF_ACDIRMAX 0x40000
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#define ALTF_NOLOCKD 0x80000
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#define ALTF_NOINET4 0x100000
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#define ALTF_NOINET6 0x200000
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struct mntopt mopts[] = {
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MOPT_STDOPTS,
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MOPT_FORCE,
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MOPT_UPDATE,
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MOPT_ASYNC,
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{ "bg", 0, ALTF_BG, 1 },
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{ "conn", 1, ALTF_NOCONN, 1 },
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{ "dumbtimer", 0, ALTF_DUMBTIMR, 1 },
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{ "intr", 0, ALTF_INTR, 1 },
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{ "nfsv3", 0, ALTF_NFSV3, 1 },
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{ "rdirplus", 0, ALTF_RDIRPLUS, 1 },
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{ "mntudp", 0, ALTF_MNTUDP, 1 },
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{ "resvport", 0, ALTF_RESVPORT, 1 },
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{ "soft", 0, ALTF_SOFT, 1 },
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{ "tcp", 0, ALTF_TCP, 1 },
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{ "port=", 0, ALTF_PORT, 1 },
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{ "nfsv2", 0, ALTF_NFSV2, 1 },
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{ "acregmin=", 0, ALTF_ACREGMIN, 1 },
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{ "acregmax=", 0, ALTF_ACREGMAX, 1 },
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{ "acdirmin=", 0, ALTF_ACDIRMIN, 1 },
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{ "acdirmax=", 0, ALTF_ACDIRMAX, 1 },
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{ "lockd", 1, ALTF_NOLOCKD, 1 },
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{ "inet4", 1, ALTF_NOINET4, 1 },
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{ "inet6", 1, ALTF_NOINET6, 1 },
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{ NULL }
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};
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struct nfs_args nfsdefargs = {
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NFS_ARGSVERSION,
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NULL,
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sizeof (struct sockaddr_in),
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SOCK_STREAM,
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0,
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NULL,
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0,
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NFSMNT_RESVPORT,
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NFS_WSIZE,
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NFS_RSIZE,
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NFS_READDIRSIZE,
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10,
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NFS_RETRANS,
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NFS_MAXGRPS,
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NFS_DEFRAHEAD,
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0, /* was: NQ_DEFLEASE */
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NFS_MAXDEADTHRESH, /* was: NQ_DEADTHRESH */
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NULL,
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/* args version 4 */
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NFS_MINATTRTIMO,
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NFS_MAXATTRTIMO,
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NFS_MINDIRATTRTIMO,
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NFS_MAXDIRATTRTIMO,
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};
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/* Table for af,sotype -> netid conversions. */
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struct nc_protos {
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char *netid;
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int af;
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int sotype;
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} nc_protos[] = {
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{"udp", AF_INET, SOCK_DGRAM},
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{"tcp", AF_INET, SOCK_STREAM},
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{"udp6", AF_INET6, SOCK_DGRAM},
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{"tcp6", AF_INET6, SOCK_STREAM},
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{NULL}
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};
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struct nfhret {
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u_long stat;
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long vers;
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long auth;
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long fhsize;
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u_char nfh[NFSX_V3FHMAX];
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};
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#define BGRND 1
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#define ISBGRND 2
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#define OF_NOINET4 4
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#define OF_NOINET6 8
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int retrycnt = -1;
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int opflags = 0;
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int nfsproto = IPPROTO_TCP;
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char *portspec = "2049"; /* Server nfs port; "0" means look up via rpcbind. */
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enum mountmode {
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ANY,
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V2,
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V3
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} mountmode = ANY;
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/* Return codes for nfs_tryproto. */
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enum tryret {
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TRYRET_SUCCESS,
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TRYRET_TIMEOUT, /* No response received. */
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TRYRET_REMOTEERR, /* Error received from remote server. */
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TRYRET_LOCALERR /* Local failure. */
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};
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int getnfsargs(char *, struct nfs_args *);
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/* void set_rpc_maxgrouplist(int); */
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struct netconfig *getnetconf_cached(const char *netid);
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char *netidbytype(int af, int sotype);
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void usage(void) __dead2;
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int xdr_dir(XDR *, char *);
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int xdr_fh(XDR *, struct nfhret *);
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enum tryret nfs_tryproto(struct nfs_args *nfsargsp, struct addrinfo *ai,
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char *hostp, char *spec, char **errstr);
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enum tryret returncode(enum clnt_stat stat, struct rpc_err *rpcerr);
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/*
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* Used to set mount flags with getmntopts. Call with dir=TRUE to
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* initialize altflags from the current mount flags. Call with
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* dir=FALSE to update mount flags with the new value of altflags after
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* the call to getmntopts.
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*/
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static void
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set_flags(int* altflags, int* nfsflags, int dir)
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{
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#define F2(af, nf) \
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if (dir) { \
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if (*nfsflags & NFSMNT_##nf) \
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*altflags |= ALTF_##af; \
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else \
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*altflags &= ~ALTF_##af; \
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} else { \
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if (*altflags & ALTF_##af) \
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*nfsflags |= NFSMNT_##nf; \
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else \
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*nfsflags &= ~NFSMNT_##nf; \
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}
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#define F(f) F2(f,f)
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F(NOCONN);
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F(DUMBTIMR);
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F2(INTR, INT);
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F(RDIRPLUS);
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F(RESVPORT);
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F(SOFT);
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F(ACREGMIN);
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F(ACREGMAX);
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F(ACDIRMIN);
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F(ACDIRMAX);
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F(NOLOCKD);
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#undef F
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#undef F2
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}
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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int c;
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struct nfs_args *nfsargsp;
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struct nfs_args nfsargs;
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int mntflags, altflags, num;
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char *name, *p, *spec;
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char mntpath[MAXPATHLEN];
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mntflags = 0;
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altflags = 0;
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nfsargs = nfsdefargs;
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nfsargsp = &nfsargs;
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while ((c = getopt(argc, argv,
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"a:bcdD:I:iNo:PR:sTt:x:U")) != -1)
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switch (c) {
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case 'a':
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num = strtol(optarg, &p, 10);
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if (*p || num < 0)
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errx(1, "illegal -a value -- %s", optarg);
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nfsargsp->readahead = num;
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nfsargsp->flags |= NFSMNT_READAHEAD;
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break;
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case 'b':
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opflags |= BGRND;
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break;
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case 'D':
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num = strtol(optarg, &p, 10);
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if (*p || num <= 0)
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errx(1, "illegal -D value -- %s", optarg);
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nfsargsp->deadthresh = num;
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nfsargsp->flags |= NFSMNT_DEADTHRESH;
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break;
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case 'I':
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num = strtol(optarg, &p, 10);
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if (*p || num <= 0)
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errx(1, "illegal -I value -- %s", optarg);
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nfsargsp->readdirsize = num;
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nfsargsp->flags |= NFSMNT_READDIRSIZE;
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break;
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case 'i':
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nfsargsp->flags |= NFSMNT_INT;
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break;
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case 'N':
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nfsargsp->flags &= ~NFSMNT_RESVPORT;
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break;
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case 'o':
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altflags = 0;
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set_flags(&altflags, &nfsargsp->flags, TRUE);
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if (mountmode == V2)
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altflags |= ALTF_NFSV2;
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else if (mountmode == V3)
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altflags |= ALTF_NFSV3;
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getmntopts(optarg, mopts, &mntflags, &altflags);
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set_flags(&altflags, &nfsargsp->flags, FALSE);
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/*
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* Handle altflags which don't map directly to
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* mount flags.
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*/
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if (altflags & ALTF_BG)
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opflags |= BGRND;
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if (altflags & ALTF_NOINET4)
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opflags |= OF_NOINET4;
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if (altflags & ALTF_NOINET6)
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opflags |= OF_NOINET6;
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if (altflags & ALTF_MNTUDP) {
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nfsargsp->sotype = SOCK_DGRAM;
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nfsproto = IPPROTO_UDP;
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}
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if (altflags & ALTF_PORT) {
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/*
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* XXX Converting from a string to an int
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* and back again is silly, and we should
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* allow /etc/services names.
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*/
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p = strstr(optarg, "port=");
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if (p) {
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asprintf(&portspec, "%d",
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atoi(p + 5));
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if (portspec == NULL)
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err(1, "asprintf");
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}
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}
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mountmode = ANY;
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if (altflags & ALTF_NFSV2)
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mountmode = V2;
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if (altflags & ALTF_NFSV3)
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mountmode = V3;
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if (altflags & ALTF_ACREGMIN) {
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p = strstr(optarg, "acregmin=");
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if (p)
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nfsargsp->acregmin = atoi(p + 9);
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}
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if (altflags & ALTF_ACREGMAX) {
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p = strstr(optarg, "acregmax=");
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if (p)
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nfsargsp->acregmax = atoi(p + 9);
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}
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if (altflags & ALTF_ACDIRMIN) {
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p = strstr(optarg, "acdirmin=");
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if (p)
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nfsargsp->acdirmin = atoi(p + 9);
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}
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if (altflags & ALTF_ACDIRMAX) {
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p = strstr(optarg, "acdirmax=");
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if (p)
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nfsargsp->acdirmax = atoi(p + 9);
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}
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break;
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case 'P':
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/* obsolete for NFSMNT_RESVPORT, now default */
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break;
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case 'R':
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num = strtol(optarg, &p, 10);
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if (*p || num < 0)
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errx(1, "illegal -R value -- %s", optarg);
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retrycnt = num;
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break;
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case 's':
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nfsargsp->flags |= NFSMNT_SOFT;
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break;
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case 'T':
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nfsargsp->sotype = SOCK_STREAM;
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nfsproto = IPPROTO_TCP;
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break;
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case 't':
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num = strtol(optarg, &p, 10);
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if (*p || num <= 0)
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errx(1, "illegal -t value -- %s", optarg);
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nfsargsp->timeo = num;
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nfsargsp->flags |= NFSMNT_TIMEO;
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break;
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case 'x':
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num = strtol(optarg, &p, 10);
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if (*p || num <= 0)
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errx(1, "illegal -x value -- %s", optarg);
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nfsargsp->retrans = num;
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nfsargsp->flags |= NFSMNT_RETRANS;
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break;
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case 'U':
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nfsargsp->sotype = SOCK_DGRAM;
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nfsproto = IPPROTO_UDP;
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break;
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default:
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usage();
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break;
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}
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argc -= optind;
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argv += optind;
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if (argc != 2) {
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usage();
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/* NOTREACHED */
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}
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spec = *argv++;
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name = *argv;
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if (retrycnt == -1)
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/* The default is to keep retrying forever. */
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retrycnt = 0;
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if (!getnfsargs(spec, nfsargsp))
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exit(1);
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/* resolve the mountpoint with realpath(3) */
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(void)checkpath(name, mntpath);
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if (mount("nfs4", mntpath, mntflags, nfsargsp))
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err(1, "%s", mntpath);
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exit(0);
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}
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int
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getnfsargs(spec, nfsargsp)
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char *spec;
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struct nfs_args *nfsargsp;
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{
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struct addrinfo hints, *ai_nfs, *ai;
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enum tryret ret;
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int ecode, speclen, remoteerr;
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char *hostp, *delimp, *errstr;
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size_t len;
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static char nam[MNAMELEN + 1];
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if ((delimp = strrchr(spec, ':')) != NULL) {
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hostp = spec;
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spec = delimp + 1;
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} else if ((delimp = strrchr(spec, '@')) != NULL) {
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warnx("path@server syntax is deprecated, use server:path");
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hostp = delimp + 1;
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} else {
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warnx("no <host>:<dirpath> nfs-name");
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return (0);
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}
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*delimp = '\0';
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/*
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* If there has been a trailing slash at mounttime it seems
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* that some mountd implementations fail to remove the mount
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* entries from their mountlist while unmounting.
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*/
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for (speclen = strlen(spec);
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speclen > 1 && spec[speclen - 1] == '/';
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speclen--)
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spec[speclen - 1] = '\0';
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if (strlen(hostp) + strlen(spec) + 1 > MNAMELEN) {
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warnx("%s:%s: %s", hostp, spec, strerror(ENAMETOOLONG));
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return (0);
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}
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/* Make both '@' and ':' notations equal */
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if (*hostp != '\0') {
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len = strlen(hostp);
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memmove(nam, hostp, len);
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nam[len] = ':';
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memmove(nam + len + 1, spec, speclen);
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|
nam[len + speclen + 1] = '\0';
|
|
}
|
|
|
|
/*
|
|
* Handle an internet host address.
|
|
*/
|
|
memset(&hints, 0, sizeof hints);
|
|
hints.ai_flags = AI_NUMERICHOST;
|
|
hints.ai_socktype = nfsargsp->sotype;
|
|
if (getaddrinfo(hostp, portspec, &hints, &ai_nfs) != 0) {
|
|
hints.ai_flags = 0;
|
|
if ((ecode = getaddrinfo(hostp, portspec, &hints, &ai_nfs))
|
|
!= 0) {
|
|
if (portspec == NULL)
|
|
errx(1, "%s: %s", hostp, gai_strerror(ecode));
|
|
else
|
|
errx(1, "%s:%s: %s", hostp, portspec,
|
|
gai_strerror(ecode));
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
ret = TRYRET_LOCALERR;
|
|
for (;;) {
|
|
/*
|
|
* Try each entry returned by getaddrinfo(). Note the
|
|
* occurence of remote errors by setting `remoteerr'.
|
|
*/
|
|
remoteerr = 0;
|
|
for (ai = ai_nfs; ai != NULL; ai = ai->ai_next) {
|
|
if ((ai->ai_family == AF_INET6) &&
|
|
(opflags & OF_NOINET6))
|
|
continue;
|
|
if ((ai->ai_family == AF_INET) &&
|
|
(opflags & OF_NOINET4))
|
|
continue;
|
|
ret = nfs_tryproto(nfsargsp, ai, hostp, spec, &errstr);
|
|
if (ret == TRYRET_SUCCESS)
|
|
break;
|
|
if (ret != TRYRET_LOCALERR)
|
|
remoteerr = 1;
|
|
if ((opflags & ISBGRND) == 0)
|
|
fprintf(stderr, "%s\n", errstr);
|
|
}
|
|
if (ret == TRYRET_SUCCESS)
|
|
break;
|
|
|
|
/* Exit if all errors were local. */
|
|
if (!remoteerr)
|
|
exit(1);
|
|
|
|
/*
|
|
* If retrycnt == 0, we are to keep retrying forever.
|
|
* Otherwise decrement it, and exit if it hits zero.
|
|
*/
|
|
if (retrycnt != 0 && --retrycnt == 0)
|
|
exit(1);
|
|
|
|
if ((opflags & (BGRND | ISBGRND)) == BGRND) {
|
|
warnx("Cannot immediately mount %s:%s, backgrounding",
|
|
hostp, spec);
|
|
opflags |= ISBGRND;
|
|
if (daemon(0, 0) != 0)
|
|
err(1, "daemon");
|
|
}
|
|
sleep(60);
|
|
}
|
|
freeaddrinfo(ai_nfs);
|
|
nfsargsp->hostname = nam;
|
|
/* Add mounted file system to PATH_MOUNTTAB */
|
|
if (!add_mtab(hostp, spec))
|
|
warnx("can't update %s for %s:%s", PATH_MOUNTTAB, hostp, spec);
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Try to set up the NFS arguments according to the address
|
|
* family, protocol (and possibly port) specified in `ai'.
|
|
*
|
|
* Returns TRYRET_SUCCESS if successful, or:
|
|
* TRYRET_TIMEOUT The server did not respond.
|
|
* TRYRET_REMOTEERR The server reported an error.
|
|
* TRYRET_LOCALERR Local failure.
|
|
*
|
|
* In all error cases, *errstr will be set to a statically-allocated string
|
|
* describing the error.
|
|
*/
|
|
enum tryret
|
|
nfs_tryproto(struct nfs_args *nfsargsp, struct addrinfo *ai, char *hostp,
|
|
char *spec, char **errstr)
|
|
{
|
|
static char errbuf[256];
|
|
struct sockaddr_storage nfs_ss;
|
|
struct netbuf nfs_nb;
|
|
struct netconfig *nconf;
|
|
char *netid;
|
|
int nfsvers;
|
|
|
|
errbuf[0] = '\0';
|
|
*errstr = errbuf;
|
|
|
|
if ((netid = netidbytype(ai->ai_family, nfsargsp->sotype)) == NULL) {
|
|
snprintf(errbuf, sizeof errbuf,
|
|
"af %d sotype %d not supported", ai->ai_family,
|
|
nfsargsp->sotype);
|
|
return (TRYRET_LOCALERR);
|
|
}
|
|
if ((nconf = getnetconf_cached(netid)) == NULL) {
|
|
snprintf(errbuf, sizeof errbuf, "%s: %s", netid, nc_sperror());
|
|
return (TRYRET_LOCALERR);
|
|
}
|
|
|
|
nfsvers = 4;
|
|
|
|
if (portspec != NULL && atoi(portspec) != 0) {
|
|
/* `ai' contains the complete nfsd sockaddr. */
|
|
nfs_nb.buf = ai->ai_addr;
|
|
nfs_nb.len = nfs_nb.maxlen = ai->ai_addrlen;
|
|
} else {
|
|
/* Ask the remote rpcbind. */
|
|
nfs_nb.buf = &nfs_ss;
|
|
nfs_nb.len = nfs_nb.maxlen = sizeof nfs_ss;
|
|
|
|
if (!rpcb_getaddr(RPCPROG_NFS, nfsvers, nconf, &nfs_nb,
|
|
hostp)) {
|
|
snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s",
|
|
netid, hostp, spec,
|
|
clnt_spcreateerror("RPCPROG_NFS"));
|
|
return (returncode(rpc_createerr.cf_stat,
|
|
&rpc_createerr.cf_error));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Store the filehandle and server address in nfsargsp, making
|
|
* sure to copy any locally allocated structures.
|
|
*/
|
|
nfsargsp->addrlen = nfs_nb.len;
|
|
nfsargsp->addr = malloc(nfsargsp->addrlen);
|
|
|
|
if (nfsargsp->addr == NULL)
|
|
err(1, "malloc");
|
|
bcopy(nfs_nb.buf, nfsargsp->addr, nfsargsp->addrlen);
|
|
|
|
/* XXX hack */
|
|
nfsargsp->flags |= (NFSMNT_NFSV3 | NFSMNT_NFSV4);
|
|
|
|
return (TRYRET_SUCCESS);
|
|
}
|
|
|
|
|
|
/*
|
|
* Catagorise a RPC return status and error into an `enum tryret'
|
|
* return code.
|
|
*/
|
|
enum tryret
|
|
returncode(enum clnt_stat stat, struct rpc_err *rpcerr)
|
|
{
|
|
switch (stat) {
|
|
case RPC_TIMEDOUT:
|
|
return (TRYRET_TIMEOUT);
|
|
case RPC_PMAPFAILURE:
|
|
case RPC_PROGNOTREGISTERED:
|
|
case RPC_PROGVERSMISMATCH:
|
|
/* XXX, these can be local or remote. */
|
|
case RPC_CANTSEND:
|
|
case RPC_CANTRECV:
|
|
return (TRYRET_REMOTEERR);
|
|
case RPC_SYSTEMERROR:
|
|
switch (rpcerr->re_errno) {
|
|
case ETIMEDOUT:
|
|
return (TRYRET_TIMEOUT);
|
|
case ENOMEM:
|
|
break;
|
|
default:
|
|
return (TRYRET_REMOTEERR);
|
|
}
|
|
/* FALLTHROUGH */
|
|
default:
|
|
break;
|
|
}
|
|
return (TRYRET_LOCALERR);
|
|
}
|
|
|
|
/*
|
|
* Look up a netid based on an address family and socket type.
|
|
* `af' is the address family, and `sotype' is SOCK_DGRAM or SOCK_STREAM.
|
|
*
|
|
* XXX there should be a library function for this.
|
|
*/
|
|
char *
|
|
netidbytype(int af, int sotype) {
|
|
struct nc_protos *p;
|
|
|
|
for (p = nc_protos; p->netid != NULL; p++) {
|
|
if (af != p->af || sotype != p->sotype)
|
|
continue;
|
|
return (p->netid);
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Look up a netconfig entry based on a netid, and cache the result so
|
|
* that we don't need to remember to call freenetconfigent().
|
|
*
|
|
* Otherwise it behaves just like getnetconfigent(), so nc_*error()
|
|
* work on failure.
|
|
*/
|
|
struct netconfig *
|
|
getnetconf_cached(const char *netid) {
|
|
static struct nc_entry {
|
|
struct netconfig *nconf;
|
|
struct nc_entry *next;
|
|
} *head;
|
|
struct nc_entry *p;
|
|
struct netconfig *nconf;
|
|
|
|
for (p = head; p != NULL; p = p->next)
|
|
if (strcmp(netid, p->nconf->nc_netid) == 0)
|
|
return (p->nconf);
|
|
|
|
if ((nconf = getnetconfigent(netid)) == NULL)
|
|
return (NULL);
|
|
if ((p = malloc(sizeof(*p))) == NULL)
|
|
err(1, "malloc");
|
|
p->nconf = nconf;
|
|
p->next = head;
|
|
head = p;
|
|
|
|
return (p->nconf);
|
|
}
|
|
|
|
void
|
|
usage()
|
|
{
|
|
(void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
|
|
"usage: mount_nfs [-KNPTUbiqs] [-D deadthresh] [-I readdirsize]",
|
|
" [-R retrycnt] [-a maxreadahead]",
|
|
" [-m realm] [-o options]",
|
|
" [-t timeout] [-x retrans] rhost:path node");
|
|
exit(1);
|
|
}
|