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showmount.c

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
 * Reserved.  This file contains Original Code and/or Modifications of
 * Original Code as defined in and that are subject to the Apple Public
 * Source License Version 1.0 (the 'License').  You may not use this file
 * except in compliance with the License.  Please obtain a copy of the
 * License at http://www.apple.com/publicsource and read it before using
 * this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License."
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1989, 1993, 1995
 *    The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Rick Macklem at The University of Guelph.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    This product includes software developed by the University of
 *    California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */


#include <sys/types.h>
#include <sys/file.h>
#include <sys/socket.h>
#include <sys/socketvar.h>

#include <netdb.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include <rpc/pmap_prot.h>
#include <nfs/rpcv2.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "showmount.h"

struct mountlist *mntdump;
struct exportslist *exports;
int type = 0;
int rpcs = 0, mntvers = 1;

void  print_dump(struct mountlist *);
void  usage(void);
int   xdr_mntdump(XDR *, struct mountlist **);
int   xdr_exports(XDR *, struct exportslist **);
void  do_print(char *host);
extern void browse();

/*
 * This command queries the NFS mount daemon for it's mount list and/or
 * it's exports list and prints them out.
 * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A"
 * and the "Network File System Protocol XXX.."
 * for detailed information on the protocol.
 */
int
main(argc, argv)
      int argc;
      char **argv;
{
      char ch, *host;
      int do_browse = 0;

      while ((ch = getopt(argc, argv, "Aade3")) != EOF)
            switch((char)ch) {
            case 'A': do_browse = 1; break;
            case 'a':
                  if (type == 0) {
                        type = ALL;
                        rpcs |= DODUMP;
                  } else
                        usage();
                  break;
            case 'd':
                  if (type == 0) {
                        type = DIRS;
                        rpcs |= DODUMP;
                  } else
                        usage();
                  break;
            case 'e':
                  rpcs |= DOEXPORTS;
                  break;
            case '3':
                  mntvers = 3;
                  break;
            case '?':
            default:
                  usage();
            }
      argc -= optind;
      argv += optind;

      if( do_browse ) {
            browse();
            exit(0);
      }

      if (argc > 0)
            host = *argv;
      else
            host = "localhost";

      do_print(host);
      exit(0);
}

/*
 * Xdr routine for retrieving the mount dump list
 */
int
xdr_mntdump(xdrsp, mlp)
      XDR *xdrsp;
      struct mountlist **mlp;
{
      struct mountlist *mp, **otp, *tp;
      int bool, val, val2;
      char *strp;

      *mlp = (struct mountlist *)0;
      if (!xdr_bool(xdrsp, &bool))
            return (0);
      while (bool) {
            mp = (struct mountlist *)malloc(sizeof(struct mountlist));
            if (mp == NULL)
                  return (0);
            mp->ml_left = mp->ml_right = (struct mountlist *)0;
            strp = mp->ml_host;
            if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
                  return (0);
            strp = mp->ml_dirp;
            if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
                  return (0);

            /*
             * Build a binary tree on sorted order of either host or dirp.
             * Drop any duplications.
             */
            if (*mlp == NULL) {
                  *mlp = mp;
            } else {
                  tp = *mlp;
                  while (tp) {
                        val = strcmp(mp->ml_host, tp->ml_host);
                        val2 = strcmp(mp->ml_dirp, tp->ml_dirp);
                        switch (type) {
                        case ALL:
                              if (val == 0) {
                                    if (val2 == 0) {
                                          free((caddr_t)mp);
                                          goto next;
                                    }
                                    val = val2;
                              }
                              break;
                        case DIRS:
                              if (val2 == 0) {
                                    free((caddr_t)mp);
                                    goto next;
                              }
                              val = val2;
                              break;
                        default:
                              if (val == 0) {
                                    free((caddr_t)mp);
                                    goto next;
                              }
                              break;
                        };
                        if (val < 0) {
                              otp = &tp->ml_left;
                              tp = tp->ml_left;
                        } else {
                              otp = &tp->ml_right;
                              tp = tp->ml_right;
                        }
                  }
                  *otp = mp;
            }
next:
            if (!xdr_bool(xdrsp, &bool))
                  return (0);
      }
      return (1);
}

/*
 * Xdr routine to retrieve exports list
 */
int
xdr_exports(xdrsp, exp)
      XDR *xdrsp;
      struct exportslist **exp;
{
      struct exportslist *ep;
      struct grouplist *gp;
      int bool, grpbool;
      char *strp;

      *exp = (struct exportslist *)0;
      if (!xdr_bool(xdrsp, &bool))
            return (0);
      while (bool) {
            ep = (struct exportslist *)malloc(sizeof(struct exportslist));
            if (ep == NULL)
                  return (0);
            ep->ex_groups = (struct grouplist *)0;
            strp = ep->ex_dirp;
            if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
                  return (0);
            if (!xdr_bool(xdrsp, &grpbool))
                  return (0);
            while (grpbool) {
                  gp = (struct grouplist *)malloc(sizeof(struct grouplist));
                  if (gp == NULL)
                        return (0);
                  strp = gp->gr_name;
                  if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
                        return (0);
                  gp->gr_next = ep->ex_groups;
                  ep->ex_groups = gp;
                  if (!xdr_bool(xdrsp, &grpbool))
                        return (0);
            }
            ep->ex_next = *exp;
            *exp = ep;
            if (!xdr_bool(xdrsp, &bool))
                  return (0);
      }
      return (1);
}

void
usage()
{

      fprintf(stderr, "usage: showmount [-ade] host\n");
      exit(1);
}

/*
 * Print the binary tree in inorder so that output is sorted.
 */
void
print_dump(mp)
      struct mountlist *mp;
{

      if (mp == NULL)
            return;
      if (mp->ml_left)
            print_dump(mp->ml_left);
      switch (type) {
      case ALL:
            printf("%s:%s\n", mp->ml_host, mp->ml_dirp);
            break;
      case DIRS:
            printf("%s\n", mp->ml_dirp);
            break;
      default:
            printf("%s\n", mp->ml_host);
            break;
      };
      if (mp->ml_right)
            print_dump(mp->ml_right);
}

void do_print(char *host)
{
      struct exportslist *exp;
      struct grouplist *grp;
      int estat;

      if (rpcs == 0)
            rpcs = DODUMP;

      if (rpcs & DODUMP)
            if ((estat = callrpc(host, RPCPROG_MNT, mntvers,
                  RPCMNT_DUMP, xdr_void, (char *)0,
                  xdr_mntdump, (char *)&mntdump)) != 0) {
                  clnt_perrno(estat);
                  fprintf(stderr, ": Can't do Mountdump rpc\n");
                  exit(1);
            }
      if (rpcs & DOEXPORTS)
            if ((estat = callrpc(host, RPCPROG_MNT, mntvers,
                  RPCMNT_EXPORT, xdr_void, (char *)0,
                  xdr_exports, (char *)&exports)) != 0) {
                  clnt_perrno(estat);
                  fprintf(stderr, ": Can't do Exports rpc\n");
                  exit(1);
            }

      /* Now just print out the results */
      if (rpcs & DODUMP) {
            switch (type) {
            case ALL:
                  printf("All mount points on %s:\n", host);
                  break;
            case DIRS:
                  printf("Directories on %s:\n", host);
                  break;
            default:
                  printf("Hosts on %s:\n", host);
                  break;
            };
            print_dump(mntdump);
      }
      if (rpcs & DOEXPORTS) {
            printf("Exports list on %s:\n", host);
            exp = exports;
            while (exp) {
                  printf("%-35s", exp->ex_dirp);
                  grp = exp->ex_groups;
                  if (grp == NULL) {
                        printf(" Everyone\n"); // allow space
                  } else {
                        while (grp) {
                              printf("%s ", grp->gr_name);
                              grp = grp->gr_next;
                        }
                        printf("\n");
                  }
                  exp = exp->ex_next;
            }
      }

}

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