initial import of NetBSD tree

1 files changed, 417 insertions, 0 deletions

diff --git a/sbin/umount/umount.c b/sbin/umount/umount.c
new file mode 100644
index 00000000000..403a09377ed
--- /dev/null
+++ b/sbin/umount/umount.c
@@ -0,0 +1,417 @@
+/*	$NetBSD: umount.c,v 1.15 1995/09/22 02:03:48 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. 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.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1980, 1989, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)umount.c	8.3 (Berkeley) 2/20/94";
+#else
+static char rcsid[] = "$NetBSD: umount.c,v 1.15 1995/09/22 02:03:48 mycroft Exp $";
+#endif
+#endif /* not lint */
+
+#include <sys/param.h>
+#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 <fstab.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+typedef enum { MNTON, MNTFROM } mntwhat;
+
+int	fake, fflag, verbose;
+char	**typelist = NULL;
+char	*nfshost;
+
+char	*getmntname __P((char *, mntwhat, char *));
+void	 maketypelist __P((char *));
+int	 selected __P((const char *));
+int	 namematch __P((struct hostent *));
+int	 umountall __P((void));
+int	 umountfs __P((char *));
+void	 usage __P((void));
+int	 xdr_dir __P((XDR *, char *));
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	int all, ch, errs;
+
+	/* Start disks transferring immediately. */
+	sync();
+
+	all = 0;
+	while ((ch = getopt(argc, argv, "aFfh:t:v")) != EOF)
+		switch (ch) {
+		case 'a':
+			all = 1;
+			break;
+		case 'F':
+			fake = 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("nfs");
+		
+	if (all) {
+		if (setfsent() == 0)
+			err(1, "%s", _PATH_FSTAB);
+		errs = umountall();
+	} else
+		for (errs = 0; *argv != NULL; ++argv)
+			if (umountfs(*argv) != 0)
+				errs = 1;
+	exit(errs);
+}
+
+int
+umountall()
+{
+	struct fstab *fs;
+	int rval;
+	char *cp;
+
+	while ((fs = getfsent()) != NULL) {
+		/* Ignore the root. */
+		if (strcmp(fs->fs_file, "/") == 0)
+			continue;
+		/*
+		 * !!!
+		 * Historic practice: ignore unknown FSTAB_* fields.
+		 */
+		if (strcmp(fs->fs_type, FSTAB_RW) &&
+		    strcmp(fs->fs_type, FSTAB_RO) &&
+		    strcmp(fs->fs_type, FSTAB_RQ))
+			continue;
+
+		if (!selected(fs->fs_vfstype))
+			continue;
+
+		/* 
+		 * We want to unmount the file systems in the reverse order
+		 * that they were mounted.  So, we save off the file name
+		 * in some allocated memory, and then call recursively.
+		 */
+		if ((cp = malloc((size_t)strlen(fs->fs_file) + 1)) == NULL)
+			err(1, NULL);
+		(void)strcpy(cp, fs->fs_file);
+		rval = umountall();
+		return (umountfs(cp) || rval);
+	}
+	return (0);
+}
+
+int
+umountfs(name)
+	char *name;
+{
+	enum clnt_stat clnt_stat;
+	struct hostent *hp;
+	struct sockaddr_in saddr;
+	struct stat sb;
+	struct timeval pertry, try;
+	CLIENT *clp;
+	int so;
+	char *delimp, *hostp, *mntpt, rname[MAXPATHLEN], type[MFSNAMELEN];
+
+	if (realpath(name, rname) == NULL) {
+		warn("%s", rname);
+		return (1);
+	}
+
+	mntpt = name = rname;
+
+	if (stat(name, &sb) < 0) {
+		if ((name = getmntname(mntpt, MNTFROM, type)) == NULL) {
+			name = rname;
+			if ((mntpt = getmntname(name, MNTON, type)) == NULL) {
+				warnx("%s: not currently mounted", name);
+				return (1);
+			}
+		}
+	} else 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)) {
+		if ((name = getmntname(mntpt, MNTFROM, type)) == NULL) {
+			warnx("%s: not currently mounted", mntpt);
+			return (1);
+		}
+	} else {
+		warnx("%s: not a directory or special device", name);
+		return (1);
+	}
+
+	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)
+		(void)printf("%s: unmount from %s\n", name, mntpt);
+	if (fake)
+		return (0);
+
+	if (unmount(mntpt, fflag) < 0) {
+		warn("%s", mntpt);
+		return (1);
+	}
+
+	if (!strncmp(type, MOUNT_NFS, MFSNAMELEN) &&
+	    (hp != NULL) && !(fflag & MNT_FORCE)) {
+		*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 PRC");
+			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);
+	}
+	return (0);
+}
+
+char *
+getmntname(name, what, type)
+	char *name;
+	mntwhat what;
+	char *type;
+{
+	struct statfs *mntbuf;
+	int i, mntsize;
+
+	if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) {
+		warn("getmntinfo");
+		return (NULL);
+	}
+	for (i = 0; i < mntsize; i++) {
+		if ((what == MNTON) && !strcmp(mntbuf[i].f_mntfromname, name)) {
+			if (type)
+				memcpy(type, mntbuf[i].f_fstypename,
+				    sizeof(mntbuf[i].f_fstypename));
+			return (mntbuf[i].f_mntonname);
+		}
+		if ((what == MNTFROM) && !strcmp(mntbuf[i].f_mntonname, name)) {
+			if (type)
+				memcpy(type, mntbuf[i].f_fstypename,
+				    sizeof(mntbuf[i].f_fstypename));
+			return (mntbuf[i].f_mntfromname);
+		}
+	}
+	return (NULL);
+}
+
+static enum { IN_LIST, NOT_IN_LIST } which;
+
+int
+selected(type)
+	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(fslist)
+	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 "noyyy,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 = malloc((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(hp)
+	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);
+}
+
+/*
+ * xdr routines for mount rpc's
+ */
+int
+xdr_dir(xdrsp, dirp)
+	XDR *xdrsp;
+	char *dirp;
+{
+	return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
+}
+
+void
+usage()
+{
+	(void)fprintf(stderr,
+	    "usage: %s\n       %s\n",
+	    "umount [-fv] [-t fstypelist] special | node",
+	    "umount -a[fv] [-h host] [-t fstypelist]");
+	exit(1);
+}