420 lines
9.6 KiB
C
420 lines
9.6 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1989, 1993, 1995
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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. 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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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1989, 1993, 1995\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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#if 0
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static char sccsid[] = "@(#)showmount.c 8.3 (Berkeley) 3/29/95";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <sys/file.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <err.h>
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#include <netdb.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 <rpcsvc/mount.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 <unistd.h>
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#include <vis.h>
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/* Constant defs */
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#define ALL 1
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#define DIRS 2
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#define DODUMP 0x1
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#define DOEXPORTS 0x2
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#define DOPARSABLEEXPORTS 0x4
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struct mountlist {
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struct mountlist *ml_left;
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struct mountlist *ml_right;
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char ml_host[MNTNAMLEN+1];
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char ml_dirp[MNTPATHLEN+1];
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};
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struct grouplist {
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struct grouplist *gr_next;
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char gr_name[MNTNAMLEN+1];
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};
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struct exportslist {
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struct exportslist *ex_next;
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struct grouplist *ex_groups;
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char ex_dirp[MNTPATHLEN+1];
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};
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static struct mountlist *mntdump;
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static struct exportslist *exportslist;
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static int type = 0;
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void print_dump(struct mountlist *);
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static void usage(void);
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int xdr_mntdump(XDR *, struct mountlist **);
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int xdr_exportslist(XDR *, struct exportslist **);
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int tcp_callrpc(const char *host, int prognum, int versnum, int procnum,
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xdrproc_t inproc, char *in, xdrproc_t outproc, char *out);
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/*
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* This command queries the NFS mount daemon for it's mount list and/or
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* it's exports list and prints them out.
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* See "NFS: Network File System Protocol Specification, RFC1094, Appendix A"
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* and the "Network File System Protocol XXX.."
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* for detailed information on the protocol.
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*/
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int
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main(int argc, char **argv)
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{
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char strvised[MNTPATHLEN * 4 + 1];
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register struct exportslist *exp;
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register struct grouplist *grp;
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register int rpcs = 0, mntvers = 3;
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const char *host;
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int ch, estat, nbytes;
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while ((ch = getopt(argc, argv, "adEe13")) != -1)
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switch (ch) {
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case 'a':
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if (type == 0) {
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type = ALL;
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rpcs |= DODUMP;
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} else
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usage();
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break;
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case 'd':
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if (type == 0) {
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type = DIRS;
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rpcs |= DODUMP;
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} else
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usage();
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break;
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case 'E':
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rpcs |= DOPARSABLEEXPORTS;
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break;
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case 'e':
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rpcs |= DOEXPORTS;
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break;
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case '1':
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mntvers = 1;
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break;
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case '3':
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mntvers = 3;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if ((rpcs & DOPARSABLEEXPORTS) != 0) {
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if ((rpcs & DOEXPORTS) != 0)
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errx(1, "-E cannot be used with -e");
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if ((rpcs & DODUMP) != 0)
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errx(1, "-E cannot be used with -a or -d");
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}
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if (argc > 0)
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host = *argv;
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else
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host = "localhost";
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if (rpcs == 0)
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rpcs = DODUMP;
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if (rpcs & DODUMP)
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if ((estat = tcp_callrpc(host, MOUNTPROG, mntvers,
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MOUNTPROC_DUMP, (xdrproc_t)xdr_void, (char *)0,
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(xdrproc_t)xdr_mntdump, (char *)&mntdump)) != 0) {
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clnt_perrno(estat);
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errx(1, "can't do mountdump rpc");
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}
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if (rpcs & (DOEXPORTS | DOPARSABLEEXPORTS))
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if ((estat = tcp_callrpc(host, MOUNTPROG, mntvers,
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MOUNTPROC_EXPORT, (xdrproc_t)xdr_void, (char *)0,
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(xdrproc_t)xdr_exportslist, (char *)&exportslist)) != 0) {
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clnt_perrno(estat);
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errx(1, "can't do exports rpc");
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}
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/* Now just print out the results */
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if (rpcs & DODUMP) {
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switch (type) {
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case ALL:
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printf("All mount points on %s:\n", host);
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break;
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case DIRS:
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printf("Directories on %s:\n", host);
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break;
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default:
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printf("Hosts on %s:\n", host);
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break;
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}
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print_dump(mntdump);
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}
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if (rpcs & DOEXPORTS) {
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printf("Exports list on %s:\n", host);
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exp = exportslist;
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while (exp) {
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printf("%-34s ", exp->ex_dirp);
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grp = exp->ex_groups;
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if (grp == NULL) {
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printf("Everyone\n");
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} else {
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while (grp) {
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printf("%s ", grp->gr_name);
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grp = grp->gr_next;
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}
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printf("\n");
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}
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exp = exp->ex_next;
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}
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}
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if (rpcs & DOPARSABLEEXPORTS) {
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exp = exportslist;
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while (exp) {
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nbytes = strsnvis(strvised, sizeof(strvised),
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exp->ex_dirp, VIS_GLOB | VIS_NL, "\"'$");
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if (nbytes == -1)
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err(1, "strsnvis");
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printf("%s\n", strvised);
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exp = exp->ex_next;
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}
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}
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exit(0);
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}
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/*
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* tcp_callrpc has the same interface as callrpc, but tries to
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* use tcp as transport method in order to handle large replies.
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*/
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int
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tcp_callrpc(const char *host, int prognum, int versnum, int procnum,
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xdrproc_t inproc, char *in, xdrproc_t outproc, char *out)
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{
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CLIENT *client;
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struct timeval timeout;
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int rval;
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if ((client = clnt_create(host, prognum, versnum, "tcp")) == NULL &&
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(client = clnt_create(host, prognum, versnum, "udp")) == NULL)
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return ((int) rpc_createerr.cf_stat);
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timeout.tv_sec = 25;
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timeout.tv_usec = 0;
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rval = (int) clnt_call(client, procnum,
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inproc, in,
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outproc, out,
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timeout);
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clnt_destroy(client);
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return rval;
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}
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/*
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* Xdr routine for retrieving the mount dump list
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*/
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int
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xdr_mntdump(XDR *xdrsp, struct mountlist **mlp)
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{
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register struct mountlist *mp;
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register struct mountlist *tp;
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register struct mountlist **otp;
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int val, val2;
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int bool;
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char *strp;
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*mlp = (struct mountlist *)0;
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if (!xdr_bool(xdrsp, &bool))
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return (0);
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while (bool) {
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mp = (struct mountlist *)malloc(sizeof(struct mountlist));
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if (mp == NULL)
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return (0);
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mp->ml_left = mp->ml_right = (struct mountlist *)0;
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strp = mp->ml_host;
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if (!xdr_string(xdrsp, &strp, MNTNAMLEN)) {
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free(mp);
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return (0);
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}
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strp = mp->ml_dirp;
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if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) {
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free(mp);
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return (0);
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}
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/*
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* Build a binary tree on sorted order of either host or dirp.
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* Drop any duplications.
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*/
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if (*mlp == NULL) {
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*mlp = mp;
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} else {
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tp = *mlp;
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while (tp) {
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val = strcmp(mp->ml_host, tp->ml_host);
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val2 = strcmp(mp->ml_dirp, tp->ml_dirp);
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switch (type) {
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case ALL:
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if (val == 0) {
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if (val2 == 0) {
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free((caddr_t)mp);
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goto next;
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}
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val = val2;
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}
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break;
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case DIRS:
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if (val2 == 0) {
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free((caddr_t)mp);
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goto next;
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}
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val = val2;
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break;
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default:
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if (val == 0) {
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free((caddr_t)mp);
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goto next;
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}
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break;
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}
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if (val < 0) {
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otp = &tp->ml_left;
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tp = tp->ml_left;
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} else {
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otp = &tp->ml_right;
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tp = tp->ml_right;
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}
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}
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*otp = mp;
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}
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next:
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if (!xdr_bool(xdrsp, &bool))
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return (0);
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}
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return (1);
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}
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/*
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* Xdr routine to retrieve exports list
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*/
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int
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xdr_exportslist(XDR *xdrsp, struct exportslist **exp)
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{
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register struct exportslist *ep;
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register struct grouplist *gp;
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int bool, grpbool;
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char *strp;
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*exp = (struct exportslist *)0;
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if (!xdr_bool(xdrsp, &bool))
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return (0);
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while (bool) {
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ep = (struct exportslist *)malloc(sizeof(struct exportslist));
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if (ep == NULL)
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return (0);
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ep->ex_groups = (struct grouplist *)0;
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strp = ep->ex_dirp;
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if (!xdr_string(xdrsp, &strp, MNTPATHLEN))
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return (0);
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if (!xdr_bool(xdrsp, &grpbool))
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return (0);
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while (grpbool) {
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gp = (struct grouplist *)malloc(sizeof(struct grouplist));
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if (gp == NULL)
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return (0);
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strp = gp->gr_name;
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if (!xdr_string(xdrsp, &strp, MNTNAMLEN))
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return (0);
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gp->gr_next = ep->ex_groups;
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ep->ex_groups = gp;
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if (!xdr_bool(xdrsp, &grpbool))
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return (0);
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}
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ep->ex_next = *exp;
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*exp = ep;
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if (!xdr_bool(xdrsp, &bool))
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return (0);
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}
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return (1);
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}
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static void
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usage(void)
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{
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fprintf(stderr, "usage: showmount [-a | -d] [-e3] [host]\n");
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exit(1);
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}
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/*
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* Print the binary tree in inorder so that output is sorted.
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*/
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void
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print_dump(struct mountlist *mp)
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{
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if (mp == NULL)
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return;
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if (mp->ml_left)
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print_dump(mp->ml_left);
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switch (type) {
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case ALL:
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printf("%s:%s\n", mp->ml_host, mp->ml_dirp);
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break;
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case DIRS:
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printf("%s\n", mp->ml_dirp);
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break;
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default:
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printf("%s\n", mp->ml_host);
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break;
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}
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if (mp->ml_right)
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print_dump(mp->ml_right);
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}
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