Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	sbin/umount/umount.c	Lines:	53	164	32.3 %
Date:	2017-11-13	Branches:	37	132	28.0 %


/*	$OpenBSD: umount.c,v 1.27 2016/12/16 17:44:59 krw Exp $	*/
/*	$NetBSD: umount.c,v 1.16 1996/05/11 14:13:55 mycroft Exp $	*/

/*-
 * Copyright (c) 1980, 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * 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.
 */

#include <sys/stat.h>
#include <sys/mount.h>
#include <sys/time.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 <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include <util.h>

typedef enum { MNTON, MNTFROM } mntwhat;

int	fflag, verbose;
char	**typelist = NULL;
char	*nfshost;

char	*getmntname(char *, mntwhat, char *);
void	 maketypelist(char *);
int	 selected(const char *);
int	 namematch(struct hostent *);
int	 umountall(void);
int	 umountfs(char *);
void	 usage(void);
int	 xdr_dir(XDR *, char *);

int
main(int argc, char *argv[])
{
	int all, ch, errs;

	/* Start disks transferring immediately. */
	sync();

	all = 0;
	while ((ch = getopt(argc, argv, "afh:t:v")) != -1)
		switch (ch) {
		case 'a':
			all = 1;
			break;
		case 'f':
			fflag = MNT_FORCE;
			break;
		case 'h':	/* -h implies -a. */
			all = 1;
			nfshost = optarg;
			break;
		case 't':
			if (typelist != NULL)
				errx(1, "only one -t option may be specified.");
			maketypelist(optarg);
			break;
		case 'v':
			verbose = 1;
			break;
		default:
			usage();
			/* NOTREACHED */
		}
	argc -= optind;
	argv += optind;

	if ((argc == 0 && !all) || (argc != 0 && all))
		usage();

	/* -h implies "-t nfs" if no -t flag. */
	if ((nfshost != NULL) && (typelist == NULL))
		maketypelist(MOUNT_NFS);

	if (all)
		errs = umountall();
	else
		for (errs = 0; *argv != NULL; ++argv)
			if (umountfs(*argv) != 0)
				errs = 1;
	return (errs);
}

int
umountall(void)
{
	struct statfs *fs;
	int n;
	int rval;

	n = getmntinfo(&fs, MNT_NOWAIT);
	if (n == 0)
		err(1, NULL);

	rval = 0;
	while (--n >= 0) {
		/* Ignore the root. */
		if (strncmp(fs[n].f_mntonname, "/", MNAMELEN) == 0)
			continue;
		if (!selected(fs[n].f_fstypename))
			continue;
		if (umountfs(fs[n].f_mntonname))
			rval = 1;
	}
	return (rval);
}

int
umountfs(char *oname)
{
	struct hostent *hp;
#ifndef NO_NFS
	struct sockaddr_in saddr;
	struct timeval pertry, try;
	CLIENT *clp;
	int so;
#endif
	struct stat sb;
	char *delimp, *hostp, *mntpt;
	char *name, *newname, rname[PATH_MAX], type[MFSNAMELEN];

	if (isduid(oname, 0) || realpath(oname, rname) == NULL)
		mntpt = name = oname;
	else
		mntpt = name = rname;
	newname = NULL;

	/* If we can stat the file, check to see if it is a device or non-dir */
	if (stat(name, &sb) == 0) {
	    if (S_ISBLK(sb.st_mode)) {
		if ((mntpt = getmntname(name, MNTON, type)) == NULL) {
			warnx("%s: not currently mounted", name);
			return (1);
		}
	    } else if (!S_ISDIR(sb.st_mode)) {
		warnx("%s: not a directory or special device", name);
		return (1);
	    }
	}

	/*
	 * Look up the name in the mount table.
	 * 99.9% of the time the path in the kernel is the one
	 * realpath() returns but check the original just in case...
	 */
	if (!(newname = getmntname(name, MNTFROM, type)) &&
	    !(mntpt = getmntname(name, MNTON, type)) ) {
		mntpt = oname;
		if (!(newname = getmntname(oname, MNTFROM, type)) &&
		    !(mntpt = getmntname(oname, MNTON, type))) {
			warnx("%s: not currently mounted", oname);
			return (1);
		}
	}
	if (newname)
		name = newname;

	if (!selected(type))
		return (1);

	if (!strncmp(type, MOUNT_NFS, MFSNAMELEN)) {
		if ((delimp = strchr(name, '@')) != NULL) {
			hostp = delimp + 1;
			*delimp = '\0';
			hp = gethostbyname(hostp);
			*delimp = '@';
		} else if ((delimp = strchr(name, ':')) != NULL) {
			*delimp = '\0';
			hostp = name;
			hp = gethostbyname(hostp);
			name = delimp + 1;
			*delimp = ':';
		} else
			hp = NULL;
		if (!namematch(hp))
			return (1);
	}

	if (verbose)
		printf("%s: unmount from %s\n", name, mntpt);

	if (unmount(mntpt, fflag) < 0) {
		warn("%s", mntpt);
		return (1);
	}

#ifndef NO_NFS
	if (!strncmp(type, MOUNT_NFS, MFSNAMELEN) &&
	    (hp != NULL) && !(fflag & MNT_FORCE)) {
		enum clnt_stat clnt_stat;

		*delimp = '\0';
		memset(&saddr, 0, sizeof(saddr));
		saddr.sin_family = AF_INET;
		saddr.sin_port = 0;
		memmove(&saddr.sin_addr, hp->h_addr, hp->h_length);
		pertry.tv_sec = 3;
		pertry.tv_usec = 0;
		so = RPC_ANYSOCK;
		if ((clp = clntudp_create(&saddr,
		    RPCPROG_MNT, RPCMNT_VER1, pertry, &so)) == NULL) {
			clnt_pcreateerror("Cannot MNT RPC");
			return (1);
		}
		clp->cl_auth = authunix_create_default();
		try.tv_sec = 20;
		try.tv_usec = 0;
		clnt_stat = clnt_call(clp,
		    RPCMNT_UMOUNT, xdr_dir, name, xdr_void, (caddr_t)0, try);
		if (clnt_stat != RPC_SUCCESS) {
			clnt_perror(clp, "Bad MNT RPC");
			return (1);
		}
		auth_destroy(clp->cl_auth);
		clnt_destroy(clp);
	}
#endif
	return (0);
}

char *
getmntname(char *name, mntwhat what, char *type)
{
	struct statfs *mntbuf;
	int n;

	if ((n = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) {
		warn("getmntinfo");
		return (NULL);
	}
	while (--n >= 0) {
		if ((what == MNTON) &&
		    (strncmp(mntbuf[n].f_mntfromname, name, MNAMELEN) == 0 ||
		     strncmp(mntbuf[n].f_mntfromspec, name, MNAMELEN) == 0)) {
			if (type)
				memcpy(type, mntbuf[n].f_fstypename,
				    sizeof(mntbuf[n].f_fstypename));
			return (mntbuf[n].f_mntonname);
		}
		if ((what == MNTFROM) &&
		    (strncmp(mntbuf[n].f_mntonname, name, MNAMELEN) == 0)) {
			if (type)
				memcpy(type, mntbuf[n].f_fstypename,
				    sizeof(mntbuf[n].f_fstypename));
			return (mntbuf[n].f_mntfromname);
		}
	}
	return (NULL);
}

static enum { IN_LIST, NOT_IN_LIST } which;

int
selected(const char *type)
{
	char **av;

	/* If no type specified, it's always selected. */
	if (typelist == NULL)
		return (1);
	for (av = typelist; *av != NULL; ++av)
		if (!strncmp(type, *av, MFSNAMELEN))
			return (which == IN_LIST ? 1 : 0);
	return (which == IN_LIST ? 0 : 1);
}

void
maketypelist(char *fslist)
{
	int i;
	char *nextcp, **av;

	if ((fslist == NULL) || (fslist[0] == '\0'))
		errx(1, "empty type list");

	/*
	 * XXX
	 * Note: the syntax is "noxxx,yyy" for no xxx's and
	 * no yyy's, not the more intuitive "noxxx,noyyy".
	 */
	if (fslist[0] == 'n' && fslist[1] == 'o') {
		fslist += 2;
		which = NOT_IN_LIST;
	} else
		which = IN_LIST;

	/* Count the number of types. */
	for (i = 1, nextcp = fslist; (nextcp = strchr(nextcp, ',')); i++)
		++nextcp;

	/* Build an array of that many types. */
	if ((av = typelist = calloc(i + 1, sizeof(char *))) == NULL)
		err(1, NULL);
	av[0] = fslist;
	for (i = 1, nextcp = fslist; (nextcp = strchr(nextcp, ',')); i++) {
		*nextcp = '\0';
		av[i] = ++nextcp;
	}
	/* Terminate the array. */
	av[i] = NULL;
}

int
namematch(struct hostent *hp)
{
	char *cp, **np;

	if ((hp == NULL) || (nfshost == NULL))
		return (1);

	if (strcasecmp(nfshost, hp->h_name) == 0)
		return (1);

	if ((cp = strchr(hp->h_name, '.')) != NULL) {
		*cp = '\0';
		if (strcasecmp(nfshost, hp->h_name) == 0)
			return (1);
	}
	for (np = hp->h_aliases; *np; np++) {
		if (strcasecmp(nfshost, *np) == 0)
			return (1);
		if ((cp = strchr(*np, '.')) != NULL) {
			*cp = '\0';
			if (strcasecmp(nfshost, *np) == 0)
				return (1);
		}
	}
	return (0);
}

#ifndef NO_NFS
/*
 * xdr routines for mount rpc's
 */
int
xdr_dir(XDR *xdrsp, char *dirp)
{
	return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
}
#endif

void
usage(void)
{
	fprintf(stderr,
	    "usage: %s\n       %s\n",
	    "umount [-fv] special | node",
	    "umount -a [-fv] [-h host] [-t type]");
	exit(1);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: umount.c,v 1.27 2016/12/16 17:44:59 krw Exp $ */
2			/* $NetBSD: umount.c,v 1.16 1996/05/11 14:13:55 mycroft Exp $ */
3
4			/*-
5			* Copyright (c) 1980, 1989, 1993
6			* The Regents of the University of California. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			* 1. Redistributions of source code must retain the above copyright
12			* notice, this list of conditions and the following disclaimer.
13			* 2. Redistributions in binary form must reproduce the above copyright
14			* notice, this list of conditions and the following disclaimer in the
15			* documentation and/or other materials provided with the distribution.
16			* 3. Neither the name of the University nor the names of its contributors
17			* may be used to endorse or promote products derived from this software
18			* without specific prior written permission.
19			*
20			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30			* SUCH DAMAGE.
31			*/
32
33			#include <sys/stat.h>
34			#include <sys/mount.h>
35			#include <sys/time.h>
36			#include <sys/socket.h>
37			#include <sys/socketvar.h>
38
39			#include <netdb.h>
40			#include <rpc/rpc.h>
41			#include <rpc/pmap_clnt.h>
42			#include <rpc/pmap_prot.h>
43			#include <nfs/rpcv2.h>
44
45			#include <err.h>
46			#include <stdio.h>
47			#include <stdlib.h>
48			#include <string.h>
49			#include <unistd.h>
50			#include <limits.h>
51			#include <util.h>
52
53			typedef enum { MNTON, MNTFROM } mntwhat;
54
55			int fflag, verbose;
56			char **typelist = NULL;
57			char *nfshost;
58
59			char getmntname(char , mntwhat, char *);
60			void maketypelist(char *);
61			int selected(const char *);
62			int namematch(struct hostent *);
63			int umountall(void);
64			int umountfs(char *);
65			void usage(void);
66			int xdr_dir(XDR , char );
67
68			int
69			main(int argc, char *argv[])
70			{
71			int all, ch, errs;
72
73			/* Start disks transferring immediately. */
74		24	sync();
75
76			all = 0;
77	✓✓	40	while ((ch = getopt(argc, argv, "afh:t:v")) != -1)
78	✗✓✗✗ ✗✗	8	switch (ch) {
79			case 'a':
80			all = 1;
81			break;
82			case 'f':
83		8	fflag = MNT_FORCE;
84		8	break;
85			case 'h': /* -h implies -a. */
86			all = 1;
87			nfshost = optarg;
88			break;
89			case 't':
90			if (typelist != NULL)
91			errx(1, "only one -t option may be specified.");
92			maketypelist(optarg);
93			break;
94			case 'v':
95			verbose = 1;
96			break;
97			default:
98			usage();
99			/* NOTREACHED */
100			}
101		12	argc -= optind;
102		12	argv += optind;
103
104	✓✗✗✓	24	if ((argc == 0 && !all) \|\| (argc != 0 && all))
105			usage();
106
107			/* -h implies "-t nfs" if no -t flag. */
108	✗✓	12	if ((nfshost != NULL) && (typelist == NULL))
109			maketypelist(MOUNT_NFS);
110
111	✗✓	12	if (all)
112			errs = umountall();
113			else
114	✓✓	48	for (errs = 0; *argv != NULL; ++argv)
115	✓✓	12	if (umountfs(*argv) != 0)
116		8	errs = 1;
117		12	return (errs);
118			}
119
120			int
121			umountall(void)
122			{
123			struct statfs *fs;
124			int n;
125			int rval;
126
127			n = getmntinfo(&fs, MNT_NOWAIT);
128			if (n == 0)
129			err(1, NULL);
130
131			rval = 0;
132			while (--n >= 0) {
133			/* Ignore the root. */
134			if (strncmp(fs[n].f_mntonname, "/", MNAMELEN) == 0)
135			continue;
136			if (!selected(fs[n].f_fstypename))
137			continue;
138			if (umountfs(fs[n].f_mntonname))
139			rval = 1;
140			}
141			return (rval);
142			}
143
144			int
145			umountfs(char *oname)
146			{
147			struct hostent *hp;
148			#ifndef NO_NFS
149		24	struct sockaddr_in saddr;
150		12	struct timeval pertry, try;
151			CLIENT *clp;
152		12	int so;
153			#endif
154		12	struct stat sb;
155			char delimp, hostp, *mntpt;
156		12	char name, newname, rname[PATH_MAX], type[MFSNAMELEN];
157
158	✓✗✗✓	24	if (isduid(oname, 0) \|\| realpath(oname, rname) == NULL)
159			mntpt = name = oname;
160			else
161			mntpt = name = rname;
162			newname = NULL;
163
164			/* If we can stat the file, check to see if it is a device or non-dir */
165	✓✗	12	if (stat(name, &sb) == 0) {
166	✓✓	12	if (S_ISBLK(sb.st_mode)) {
167	✓✗	8	if ((mntpt = getmntname(name, MNTON, type)) == NULL) {
168		8	warnx("%s: not currently mounted", name);
169		8	return (1);
170			}
171	✗✓	4	} else if (!S_ISDIR(sb.st_mode)) {
172			warnx("%s: not a directory or special device", name);
173			return (1);
174			}
175			}
176
177			/*
178			* Look up the name in the mount table.
179			* 99.9% of the time the path in the kernel is the one
180			* realpath() returns but check the original just in case...
181			*/
182	✗✓✗✗	4	if (!(newname = getmntname(name, MNTFROM, type)) &&
183			!(mntpt = getmntname(name, MNTON, type)) ) {
184			mntpt = oname;
185			if (!(newname = getmntname(oname, MNTFROM, type)) &&
186			!(mntpt = getmntname(oname, MNTON, type))) {
187			warnx("%s: not currently mounted", oname);
188			return (1);
189			}
190			}
191	✓✗	4	if (newname)
192		4	name = newname;
193
194	✗✓	4	if (!selected(type))
195			return (1);
196
197	✗✓	4	if (!strncmp(type, MOUNT_NFS, MFSNAMELEN)) {
198			if ((delimp = strchr(name, '@')) != NULL) {
199			hostp = delimp + 1;
200			*delimp = '\0';
201			hp = gethostbyname(hostp);
202			*delimp = '@';
203			} else if ((delimp = strchr(name, ':')) != NULL) {
204			*delimp = '\0';
205			hostp = name;
206			hp = gethostbyname(hostp);
207			name = delimp + 1;
208			*delimp = ':';
209			} else
210			hp = NULL;
211			if (!namematch(hp))
212			return (1);
213			}
214
215	✗✓	4	if (verbose)
216			printf("%s: unmount from %s\n", name, mntpt);
217
218	✗✓	4	if (unmount(mntpt, fflag) < 0) {
219			warn("%s", mntpt);
220			return (1);
221			}
222
223			#ifndef NO_NFS
224	✗✓✗✗	8	if (!strncmp(type, MOUNT_NFS, MFSNAMELEN) &&
225		4	(hp != NULL) && !(fflag & MNT_FORCE)) {
226			enum clnt_stat clnt_stat;
227
228			*delimp = '\0';
229			memset(&saddr, 0, sizeof(saddr));
230			saddr.sin_family = AF_INET;
231			saddr.sin_port = 0;
232			memmove(&saddr.sin_addr, hp->h_addr, hp->h_length);
233			pertry.tv_sec = 3;
234			pertry.tv_usec = 0;
235			so = RPC_ANYSOCK;
236			if ((clp = clntudp_create(&saddr,
237			RPCPROG_MNT, RPCMNT_VER1, pertry, &so)) == NULL) {
238			clnt_pcreateerror("Cannot MNT RPC");
239			return (1);
240			}
241			clp->cl_auth = authunix_create_default();
242			try.tv_sec = 20;
243			try.tv_usec = 0;
244			clnt_stat = clnt_call(clp,
245			RPCMNT_UMOUNT, xdr_dir, name, xdr_void, (caddr_t)0, try);
246			if (clnt_stat != RPC_SUCCESS) {
247			clnt_perror(clp, "Bad MNT RPC");
248			return (1);
249			}
250			auth_destroy(clp->cl_auth);
251			clnt_destroy(clp);
252			}
253			#endif
254		4	return (0);
255		12	}
256
257			char *
258			getmntname(char name, mntwhat what, char type)
259			{
260		24	struct statfs *mntbuf;
261			int n;
262
263	✗✓	12	if ((n = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) {
264			warn("getmntinfo");
265			return (NULL);
266			}
267	✓✓	168	while (--n >= 0) {
268	✓✓✗✓	148	if ((what == MNTON) &&
269	✓✗	72	(strncmp(mntbuf[n].f_mntfromname, name, MNAMELEN) == 0 \|\|
270		72	strncmp(mntbuf[n].f_mntfromspec, name, MNAMELEN) == 0)) {
271			if (type)
272			memcpy(type, mntbuf[n].f_fstypename,
273			sizeof(mntbuf[n].f_fstypename));
274			return (mntbuf[n].f_mntonname);
275			}
276	✓✓✓✗	80	if ((what == MNTFROM) &&
277		4	(strncmp(mntbuf[n].f_mntonname, name, MNAMELEN) == 0)) {
278	✓✗	4	if (type)
279		4	memcpy(type, mntbuf[n].f_fstypename,
280			sizeof(mntbuf[n].f_fstypename));
281		4	return (mntbuf[n].f_mntfromname);
282			}
283			}
284		8	return (NULL);
285		12	}
286
287			static enum { IN_LIST, NOT_IN_LIST } which;
288
289			int
290			selected(const char *type)
291			{
292			char **av;
293
294			/* If no type specified, it's always selected. */
295	✓✗	8	if (typelist == NULL)
296		4	return (1);
297			for (av = typelist; *av != NULL; ++av)
298			if (!strncmp(type, *av, MFSNAMELEN))
299			return (which == IN_LIST ? 1 : 0);
300			return (which == IN_LIST ? 0 : 1);
301		4	}
302
303			void
304			maketypelist(char *fslist)
305			{
306			int i;
307			char nextcp, *av;
308
309			if ((fslist == NULL) \|\| (fslist[0] == '\0'))
310			errx(1, "empty type list");
311
312			/*
313			* XXX
314			* Note: the syntax is "noxxx,yyy" for no xxx's and
315			* no yyy's, not the more intuitive "noxxx,noyyy".
316			*/
317			if (fslist[0] == 'n' && fslist[1] == 'o') {
318			fslist += 2;
319			which = NOT_IN_LIST;
320			} else
321			which = IN_LIST;
322
323			/* Count the number of types. */
324			for (i = 1, nextcp = fslist; (nextcp = strchr(nextcp, ',')); i++)
325			++nextcp;
326
327			/* Build an array of that many types. */
328			if ((av = typelist = calloc(i + 1, sizeof(char *))) == NULL)
329			err(1, NULL);
330			av[0] = fslist;
331			for (i = 1, nextcp = fslist; (nextcp = strchr(nextcp, ',')); i++) {
332			*nextcp = '\0';
333			av[i] = ++nextcp;
334			}
335			/* Terminate the array. */
336			av[i] = NULL;
337			}
338
339			int
340			namematch(struct hostent *hp)
341			{
342			char cp, *np;
343
344			if ((hp == NULL) \|\| (nfshost == NULL))
345			return (1);
346
347			if (strcasecmp(nfshost, hp->h_name) == 0)
348			return (1);
349
350			if ((cp = strchr(hp->h_name, '.')) != NULL) {
351			*cp = '\0';
352			if (strcasecmp(nfshost, hp->h_name) == 0)
353			return (1);
354			}
355			for (np = hp->h_aliases; *np; np++) {
356			if (strcasecmp(nfshost, *np) == 0)
357			return (1);
358			if ((cp = strchr(*np, '.')) != NULL) {
359			*cp = '\0';
360			if (strcasecmp(nfshost, *np) == 0)
361			return (1);
362			}
363			}
364			return (0);
365			}
366
367			#ifndef NO_NFS
368			/*
369			* xdr routines for mount rpc's
370			*/
371			int
372			xdr_dir(XDR xdrsp, char dirp)
373			{
374			return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
375			}
376			#endif
377
378			void
379			usage(void)
380			{
381			fprintf(stderr,
382			"usage: %s\n %s\n",
383			"umount [-fv] special \| node",
384			"umount -a [-fv] [-h host] [-t type]");
385			exit(1);
386			}