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1.24 ! guenther 1: /* $OpenBSD: showmount.c,v 1.23 2018/04/26 12:42:51 guenther Exp $ */
1.3 deraadt 2: /* $NetBSD: showmount.c,v 1.7 1996/05/01 18:14:10 cgd Exp $ */
1.1 deraadt 3:
4: /*
5: * Copyright (c) 1989, 1993, 1995
6: * The Regents of the University of California. All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * Rick Macklem at The University of Guelph.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
1.12 millert 19: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
36: #include <sys/socket.h>
37:
38: #include <netdb.h>
39: #include <rpc/rpc.h>
40: #include <rpc/pmap_clnt.h>
41: #include <rpc/pmap_prot.h>
42: #include <nfs/rpcv2.h>
43:
44: #include <stdio.h>
45: #include <stdlib.h>
46: #include <string.h>
47: #include <unistd.h>
1.5 deraadt 48: #include <vis.h>
1.19 deraadt 49: #include <err.h>
1.1 deraadt 50:
51: /* Constant defs */
52: #define ALL 1
53: #define DIRS 2
54:
55: #define DODUMP 0x1
56: #define DOEXPORTS 0x2
57:
58: struct mountlist {
59: struct mountlist *ml_left;
60: struct mountlist *ml_right;
61: char ml_host[RPCMNT_NAMELEN+1];
62: char ml_dirp[RPCMNT_PATHLEN+1];
63: };
64:
65: struct grouplist {
66: struct grouplist *gr_next;
67: char gr_name[RPCMNT_NAMELEN+1];
68: };
69:
70: struct exportslist {
71: struct exportslist *ex_next;
72: struct grouplist *ex_groups;
73: char ex_dirp[RPCMNT_PATHLEN+1];
74: };
75:
76: static struct mountlist *mntdump;
77: static struct exportslist *exports;
78: static int type = 0;
79:
1.10 millert 80: void print_dump(struct mountlist *);
81: void usage(void);
82: int xdr_mntdump(XDR *, struct mountlist **);
83: int xdr_exports(XDR *, struct exportslist **);
1.1 deraadt 84:
85: /*
1.24 ! guenther 86: * This command queries the NFS mount daemon for its mount list and/or
! 87: * its exports list and prints them out.
1.1 deraadt 88: * See "NFS: Network File System Protocol Specification, RFC1094, Appendix A"
89: * and the "Network File System Protocol XXX.."
90: * for detailed information on the protocol.
91: */
92: int
1.13 deraadt 93: main(int argc, char *argv[])
1.1 deraadt 94: {
95: struct exportslist *exp;
96: struct grouplist *grp;
1.6 deraadt 97: struct sockaddr_in clnt_sin;
98: struct hostent *hp;
99: struct timeval timeout;
100: int rpcs = 0, mntvers = 1;
101: enum clnt_stat estat;
102: CLIENT *client;
1.2 deraadt 103: char *host;
1.6 deraadt 104: int ch, clnt_sock;
1.1 deraadt 105:
1.19 deraadt 106: if (pledge("stdio rpath inet dns", NULL) == -1)
107: err(1, "pledge");
108:
1.2 deraadt 109: while ((ch = getopt(argc, argv, "ade3")) != -1)
1.14 deraadt 110: switch (ch) {
1.1 deraadt 111: case 'a':
112: if (type == 0) {
113: type = ALL;
114: rpcs |= DODUMP;
115: } else
116: usage();
117: break;
118: case 'd':
119: if (type == 0) {
120: type = DIRS;
121: rpcs |= DODUMP;
122: } else
123: usage();
124: break;
125: case 'e':
126: rpcs |= DOEXPORTS;
127: break;
128: case '3':
129: mntvers = 3;
130: break;
131: default:
132: usage();
133: }
134: argc -= optind;
135: argv += optind;
136:
137: if (argc > 0)
138: host = *argv;
139: else
140: host = "localhost";
141:
142: if (rpcs == 0)
143: rpcs = DODUMP;
144:
1.6 deraadt 145: if ((hp = gethostbyname(host)) == NULL) {
146: fprintf(stderr, "showmount: unknown host %s\n", host);
147: exit(1);
148: }
149: bzero(&clnt_sin, sizeof clnt_sin);
150: clnt_sin.sin_family = AF_INET;
151: bcopy(hp->h_addr, (char *)&clnt_sin.sin_addr, hp->h_length);
152: clnt_sock = RPC_ANYSOCK;
153: client = clnttcp_create(&clnt_sin, RPCPROG_MNT, mntvers,
154: &clnt_sock, 0, 0);
155: if (client == NULL) {
156: clnt_pcreateerror("showmount: clnttcp_create");
157: exit(1);
158: }
159: timeout.tv_sec = 30;
160: timeout.tv_usec = 0;
1.19 deraadt 161:
162: if (pledge("stdio rpath", NULL) == -1)
163: err(1, "pledge");
1.6 deraadt 164:
165: if (rpcs & DODUMP) {
1.20 krw 166: estat = clnt_call(client, RPCMNT_DUMP, xdr_void, NULL,
1.6 deraadt 167: xdr_mntdump, (char *)&mntdump, timeout);
168: if (estat != RPC_SUCCESS) {
1.3 deraadt 169: fprintf(stderr, "showmount: Can't do Mountdump rpc: ");
1.1 deraadt 170: clnt_perrno(estat);
171: exit(1);
172: }
1.6 deraadt 173: }
174: if (rpcs & DOEXPORTS) {
1.20 krw 175: estat = clnt_call(client, RPCMNT_EXPORT, xdr_void, NULL,
1.6 deraadt 176: xdr_exports, (char *)&exports, timeout);
177: if (estat != RPC_SUCCESS) {
1.3 deraadt 178: fprintf(stderr, "showmount: Can't do Exports rpc: ");
1.1 deraadt 179: clnt_perrno(estat);
180: exit(1);
181: }
1.6 deraadt 182: }
1.1 deraadt 183:
184: /* Now just print out the results */
185: if (rpcs & DODUMP) {
186: switch (type) {
187: case ALL:
188: printf("All mount points on %s:\n", host);
189: break;
190: case DIRS:
191: printf("Directories on %s:\n", host);
192: break;
193: default:
194: printf("Hosts on %s:\n", host);
195: break;
1.9 deraadt 196: }
1.1 deraadt 197: print_dump(mntdump);
198: }
199: if (rpcs & DOEXPORTS) {
1.5 deraadt 200: char vp[(RPCMNT_PATHLEN+1)*4];
201: char vn[(RPCMNT_NAMELEN+1)*4];
202:
1.1 deraadt 203: printf("Exports list on %s:\n", host);
204: exp = exports;
205: while (exp) {
1.11 vincent 206: strnvis(vp, exp->ex_dirp, sizeof vp, VIS_CSTYLE);
1.15 deraadt 207: printf("%-34s ", vp);
1.1 deraadt 208: grp = exp->ex_groups;
209: if (grp == NULL) {
210: printf("Everyone\n");
211: } else {
212: while (grp) {
1.11 vincent 213: strnvis(vn, grp->gr_name, sizeof vn,
214: VIS_CSTYLE);
1.5 deraadt 215: printf("%s ", vn);
1.1 deraadt 216: grp = grp->gr_next;
217: }
218: printf("\n");
219: }
220: exp = exp->ex_next;
221: }
222: }
223:
224: exit(0);
225: }
226:
227: /*
228: * Xdr routine for retrieving the mount dump list
229: */
230: int
1.13 deraadt 231: xdr_mntdump(XDR *xdrsp, struct mountlist **mlp)
1.1 deraadt 232: {
1.7 deraadt 233: struct mountlist *mp, **otp = NULL, *tp;
1.1 deraadt 234: int bool, val, val2;
235: char *strp;
236:
1.20 krw 237: *mlp = NULL;
1.1 deraadt 238: if (!xdr_bool(xdrsp, &bool))
239: return (0);
240: while (bool) {
1.18 deraadt 241: mp = malloc(sizeof(struct mountlist));
1.1 deraadt 242: if (mp == NULL)
243: return (0);
1.20 krw 244: mp->ml_left = mp->ml_right = NULL;
1.1 deraadt 245: strp = mp->ml_host;
246: if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
247: return (0);
248: strp = mp->ml_dirp;
249: if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
250: return (0);
251:
252: /*
253: * Build a binary tree on sorted order of either host or dirp.
254: * Drop any duplications.
255: */
256: if (*mlp == NULL) {
257: *mlp = mp;
258: } else {
259: tp = *mlp;
260: while (tp) {
261: val = strcmp(mp->ml_host, tp->ml_host);
262: val2 = strcmp(mp->ml_dirp, tp->ml_dirp);
263: switch (type) {
264: case ALL:
265: if (val == 0) {
266: if (val2 == 0) {
267: free((caddr_t)mp);
268: goto next;
269: }
270: val = val2;
271: }
272: break;
273: case DIRS:
274: if (val2 == 0) {
275: free((caddr_t)mp);
276: goto next;
277: }
278: val = val2;
279: break;
280: default:
281: if (val == 0) {
282: free((caddr_t)mp);
283: goto next;
284: }
285: break;
1.7 deraadt 286: }
1.1 deraadt 287: if (val < 0) {
288: otp = &tp->ml_left;
289: tp = tp->ml_left;
290: } else {
291: otp = &tp->ml_right;
292: tp = tp->ml_right;
293: }
294: }
295: *otp = mp;
296: }
297: next:
298: if (!xdr_bool(xdrsp, &bool))
299: return (0);
300: }
301: return (1);
302: }
303:
304: /*
305: * Xdr routine to retrieve exports list
306: */
307: int
1.13 deraadt 308: xdr_exports(XDR *xdrsp, struct exportslist **exp)
1.1 deraadt 309: {
310: struct exportslist *ep;
311: struct grouplist *gp;
312: int bool, grpbool;
313: char *strp;
314:
1.20 krw 315: *exp = NULL;
1.1 deraadt 316: if (!xdr_bool(xdrsp, &bool))
317: return (0);
318: while (bool) {
1.18 deraadt 319: ep = malloc(sizeof(struct exportslist));
1.1 deraadt 320: if (ep == NULL)
321: return (0);
1.20 krw 322: ep->ex_groups = NULL;
1.1 deraadt 323: strp = ep->ex_dirp;
324: if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN))
325: return (0);
326: if (!xdr_bool(xdrsp, &grpbool))
327: return (0);
328: while (grpbool) {
1.18 deraadt 329: gp = malloc(sizeof(struct grouplist));
1.1 deraadt 330: if (gp == NULL)
331: return (0);
332: strp = gp->gr_name;
333: if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN))
334: return (0);
335: gp->gr_next = ep->ex_groups;
336: ep->ex_groups = gp;
337: if (!xdr_bool(xdrsp, &grpbool))
338: return (0);
339: }
340: ep->ex_next = *exp;
341: *exp = ep;
342: if (!xdr_bool(xdrsp, &bool))
343: return (0);
344: }
345: return (1);
346: }
347:
348: void
1.13 deraadt 349: usage(void)
1.1 deraadt 350: {
351:
1.16 jmc 352: fprintf(stderr, "usage: showmount [-3ade] [host]\n");
1.1 deraadt 353: exit(1);
354: }
355:
356: /*
357: * Print the binary tree in inorder so that output is sorted.
358: */
359: void
1.13 deraadt 360: print_dump(struct mountlist *mp)
1.1 deraadt 361: {
1.5 deraadt 362: char vn[(RPCMNT_NAMELEN+1)*4];
363: char vp[(RPCMNT_PATHLEN+1)*4];
1.1 deraadt 364:
365: if (mp == NULL)
366: return;
367: if (mp->ml_left)
368: print_dump(mp->ml_left);
369: switch (type) {
370: case ALL:
1.5 deraadt 371: strvis(vn, mp->ml_host, VIS_CSTYLE);
372: strvis(vp, mp->ml_dirp, VIS_CSTYLE);
373: printf("%s:%s\n", vn, vp);
1.1 deraadt 374: break;
375: case DIRS:
1.5 deraadt 376: strvis(vp, mp->ml_dirp, VIS_CSTYLE);
377: printf("%s\n", vp);
1.1 deraadt 378: break;
379: default:
1.5 deraadt 380: strvis(vn, mp->ml_host, VIS_CSTYLE);
381: printf("%s\n", vn);
1.1 deraadt 382: break;
1.9 deraadt 383: }
1.1 deraadt 384: if (mp->ml_right)
385: print_dump(mp->ml_right);
386: }