OpenBSD-4.6/usr.bin/showmount/showmount.c
/* $OpenBSD: showmount.c,v 1.16 2007/03/29 11:27:33 jmc Exp $ */
/* $NetBSD: showmount.c,v 1.7 1996/05/01 18:14:10 cgd Exp $ */
/*
* 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1989, 1993, 1995\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)showmount.c 8.3 (Berkeley) 3/29/95";
#endif
static char rcsid[] = "$OpenBSD: showmount.c,v 1.16 2007/03/29 11:27:33 jmc Exp $";
#endif /* not lint */
#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 <vis.h>
/* Constant defs */
#define ALL 1
#define DIRS 2
#define DODUMP 0x1
#define DOEXPORTS 0x2
struct mountlist {
struct mountlist *ml_left;
struct mountlist *ml_right;
char ml_host[RPCMNT_NAMELEN+1];
char ml_dirp[RPCMNT_PATHLEN+1];
};
struct grouplist {
struct grouplist *gr_next;
char gr_name[RPCMNT_NAMELEN+1];
};
struct exportslist {
struct exportslist *ex_next;
struct grouplist *ex_groups;
char ex_dirp[RPCMNT_PATHLEN+1];
};
static struct mountlist *mntdump;
static struct exportslist *exports;
static int type = 0;
void print_dump(struct mountlist *);
void usage(void);
int xdr_mntdump(XDR *, struct mountlist **);
int xdr_exports(XDR *, struct exportslist **);
/*
* 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(int argc, char *argv[])
{
struct exportslist *exp;
struct grouplist *grp;
struct sockaddr_in clnt_sin;
struct hostent *hp;
struct timeval timeout;
int rpcs = 0, mntvers = 1;
enum clnt_stat estat;
CLIENT *client;
char *host;
int ch, clnt_sock;
while ((ch = getopt(argc, argv, "ade3")) != -1)
switch (ch) {
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;
default:
usage();
}
argc -= optind;
argv += optind;
if (argc > 0)
host = *argv;
else
host = "localhost";
if (rpcs == 0)
rpcs = DODUMP;
if ((hp = gethostbyname(host)) == NULL) {
fprintf(stderr, "showmount: unknown host %s\n", host);
exit(1);
}
bzero(&clnt_sin, sizeof clnt_sin);
clnt_sin.sin_len = sizeof clnt_sin;
clnt_sin.sin_family = AF_INET;
bcopy(hp->h_addr, (char *)&clnt_sin.sin_addr, hp->h_length);
clnt_sock = RPC_ANYSOCK;
client = clnttcp_create(&clnt_sin, RPCPROG_MNT, mntvers,
&clnt_sock, 0, 0);
if (client == NULL) {
clnt_pcreateerror("showmount: clnttcp_create");
exit(1);
}
timeout.tv_sec = 30;
timeout.tv_usec = 0;
if (rpcs & DODUMP) {
estat = clnt_call(client, RPCMNT_DUMP, xdr_void, (char *)0,
xdr_mntdump, (char *)&mntdump, timeout);
if (estat != RPC_SUCCESS) {
fprintf(stderr, "showmount: Can't do Mountdump rpc: ");
clnt_perrno(estat);
exit(1);
}
}
if (rpcs & DOEXPORTS) {
estat = clnt_call(client, RPCMNT_EXPORT, xdr_void, (char *)0,
xdr_exports, (char *)&exports, timeout);
if (estat != RPC_SUCCESS) {
fprintf(stderr, "showmount: Can't do Exports rpc: ");
clnt_perrno(estat);
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) {
char vp[(RPCMNT_PATHLEN+1)*4];
char vn[(RPCMNT_NAMELEN+1)*4];
printf("Exports list on %s:\n", host);
exp = exports;
while (exp) {
strnvis(vp, exp->ex_dirp, sizeof vp, VIS_CSTYLE);
printf("%-34s ", vp);
grp = exp->ex_groups;
if (grp == NULL) {
printf("Everyone\n");
} else {
while (grp) {
strnvis(vn, grp->gr_name, sizeof vn,
VIS_CSTYLE);
printf("%s ", vn);
grp = grp->gr_next;
}
printf("\n");
}
exp = exp->ex_next;
}
}
exit(0);
}
/*
* Xdr routine for retrieving the mount dump list
*/
int
xdr_mntdump(XDR *xdrsp, struct mountlist **mlp)
{
struct mountlist *mp, **otp = NULL, *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(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(void)
{
fprintf(stderr, "usage: showmount [-3ade] [host]\n");
exit(1);
}
/*
* Print the binary tree in inorder so that output is sorted.
*/
void
print_dump(struct mountlist *mp)
{
char vn[(RPCMNT_NAMELEN+1)*4];
char vp[(RPCMNT_PATHLEN+1)*4];
if (mp == NULL)
return;
if (mp->ml_left)
print_dump(mp->ml_left);
switch (type) {
case ALL:
strvis(vn, mp->ml_host, VIS_CSTYLE);
strvis(vp, mp->ml_dirp, VIS_CSTYLE);
printf("%s:%s\n", vn, vp);
break;
case DIRS:
strvis(vp, mp->ml_dirp, VIS_CSTYLE);
printf("%s\n", vp);
break;
default:
strvis(vn, mp->ml_host, VIS_CSTYLE);
printf("%s\n", vn);
break;
}
if (mp->ml_right)
print_dump(mp->ml_right);
}