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-rw-r--r--sbin/umount/umount.c421
1 files changed, 421 insertions, 0 deletions
diff --git a/sbin/umount/umount.c b/sbin/umount/umount.c
new file mode 100644
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--- /dev/null
+++ b/sbin/umount/umount.c
@@ -0,0 +1,421 @@
+/*-
+ * 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
+static char sccsid[] = "@(#)umount.c 8.3 (Berkeley) 2/20/94";
+#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, vflag, *typelist;
+char *nfshost;
+
+int fsnametotype __P((char *));
+char *getmntname __P((char *, mntwhat, int *));
+void maketypelist __P((char *));
+int selected __P((int));
+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':
+ maketypelist(optarg);
+ break;
+ case 'v':
+ vflag = 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, type;
+ 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 an unknown file system type, complain. */
+ if ((type = fsnametotype(fs->fs_vfstype)) == MOUNT_NONE) {
+ warnx("%s: unknown mount type", fs->fs_vfstype);
+ continue;
+ }
+ if (!selected(type))
+ 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, type;
+ char *delimp, *hostp, *mntpt, rname[MAXPATHLEN];
+
+ if (realpath(name, rname) == NULL) {
+ warn("%s", rname);
+ return (0);
+ }
+
+ name = rname;
+
+ if (stat(name, &sb) < 0) {
+ if (((mntpt = getmntname(name, MNTFROM, &type)) == NULL) &&
+ ((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)) {
+ mntpt = name;
+ 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 (0);
+
+ 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 (0);
+
+ if (vflag)
+ (void)printf("%s: unmount from %s\n", name, mntpt);
+ if (fake)
+ return (0);
+
+ if (unmount(mntpt, fflag) < 0) {
+ warn("%s", mntpt);
+ return (1);
+ }
+
+ if ((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;
+ int *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)
+ *type = mntbuf[i].f_type;
+ return (mntbuf[i].f_mntonname);
+ }
+ if ((what == MNTFROM) && !strcmp(mntbuf[i].f_mntonname, name)) {
+ if (type)
+ *type = mntbuf[i].f_type;
+ return (mntbuf[i].f_mntfromname);
+ }
+ }
+ return (NULL);
+}
+
+static enum { IN_LIST, NOT_IN_LIST } which;
+
+int
+selected(type)
+ int type;
+{
+ /* If no type specified, it's always selected. */
+ if (typelist == NULL)
+ return (1);
+ for (; *typelist != MOUNT_NONE; ++typelist)
+ if (type == *typelist)
+ return (which == IN_LIST ? 1 : 0);
+ return (which == IN_LIST ? 0 : 1);
+}
+
+void
+maketypelist(fslist)
+ char *fslist;
+{
+ int *av, i;
+ char *nextcp;
+
+ 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 = 0, nextcp = fslist; *nextcp != NULL; ++nextcp)
+ if (*nextcp == ',')
+ i++;
+
+ /* Build an array of that many types. */
+ if ((av = typelist = malloc((i + 2) * sizeof(int))) == NULL)
+ err(1, NULL);
+ for (i = 0; fslist != NULL; fslist = nextcp, ++i) {
+ if ((nextcp = strchr(fslist, ',')) != NULL)
+ *nextcp++ = '\0';
+ av[i] = fsnametotype(fslist);
+ if (av[i] == MOUNT_NONE)
+ errx(1, "%s: unknown mount type", fslist);
+ }
+ /* Terminate the array. */
+ av[i++] = MOUNT_NONE;
+}
+
+int
+fsnametotype(name)
+ char *name;
+{
+ static char const *namelist[] = INITMOUNTNAMES;
+ char const **cp;
+
+ for (cp = namelist; *cp; ++cp)
+ if (strcmp(name, *cp) == 0)
+ return (cp - namelist);
+ return (MOUNT_NONE);
+}
+
+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);
+}
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