示例#1
0
/*
 * NFS stuff and unmount(2) call
 */
int
umountfs(struct statfs *sfs)
{
	char fsidbuf[64];
	enum clnt_stat clnt_stat;
	struct timeval try;
	struct addrinfo *ai, hints;
	int do_rpc;
	CLIENT *clp;
	char *nfsdirname, *orignfsdirname;
	char *hostp, *delimp;

	ai = NULL;
	do_rpc = 0;
	hostp = NULL;
	nfsdirname = delimp = orignfsdirname = NULL;
	memset(&hints, 0, sizeof hints);

	if (strcmp(sfs->f_fstypename, "nfs") == 0) {
		if ((nfsdirname = strdup(sfs->f_mntfromname)) == NULL)
			err(1, "strdup");
		orignfsdirname = nfsdirname;
		if (*nfsdirname == '[' &&
		    (delimp = strchr(nfsdirname + 1, ']')) != NULL &&
		    *(delimp + 1) == ':') {
			hostp = nfsdirname + 1;
			nfsdirname = delimp + 2;
		} else if ((delimp = strrchr(nfsdirname, ':')) != NULL) {
			hostp = nfsdirname;
			nfsdirname = delimp + 1;
		}
		if (hostp != NULL) {
			*delimp = '\0';
			getaddrinfo(hostp, NULL, &hints, &ai);
			if (ai == NULL) {
				warnx("can't get net id for host");
			}
		}

		/*
		 * Check if we have to start the rpc-call later.
		 * If there are still identical nfs-names mounted,
		 * we skip the rpc-call. Obviously this has to
		 * happen before unmount(2), but it should happen
		 * after the previous namecheck.
		 * A non-NULL return means that this is the last
		 * mount from mntfromname that is still mounted.
		 */
		if (getmntentry(sfs->f_mntfromname, NULL, NULL,
		    CHECKUNIQUE) != NULL)
			do_rpc = 1;
	}

	if (!namematch(ai)) {
		free(orignfsdirname);
		return (1);
	}
	/* First try to unmount using the file system ID. */
	snprintf(fsidbuf, sizeof(fsidbuf), "FSID:%d:%d", sfs->f_fsid.val[0],
	    sfs->f_fsid.val[1]);
	if (unmount(fsidbuf, fflag | MNT_BYFSID) != 0) {
		/* XXX, non-root users get a zero fsid, so don't warn. */
		if (errno != ENOENT || sfs->f_fsid.val[0] != 0 ||
		    sfs->f_fsid.val[1] != 0)
			warn("unmount of %s failed", sfs->f_mntonname);
		if (errno != ENOENT) {
			free(orignfsdirname);
			return (1);
		}
		/* Compatibility for old kernels. */
		if (sfs->f_fsid.val[0] != 0 || sfs->f_fsid.val[1] != 0)
			warnx("retrying using path instead of file system ID");
		if (unmount(sfs->f_mntonname, fflag) != 0) {
			warn("unmount of %s failed", sfs->f_mntonname);
			free(orignfsdirname);
			return (1);
		}
	}
	/* Mark this this file system as unmounted. */
	getmntentry(NULL, NULL, &sfs->f_fsid, REMOVE);
	if (vflag)
		(void)printf("%s: unmount from %s\n", sfs->f_mntfromname,
		    sfs->f_mntonname);
	/*
	 * Report to mountd-server which nfsname
	 * has been unmounted.
	 */
	if (ai != NULL && !(fflag & MNT_FORCE) && do_rpc) {
		clp = clnt_create(hostp, MOUNTPROG, MOUNTVERS, "udp");
		if (clp  == NULL) {
			warnx("%s: %s", hostp,
			    clnt_spcreateerror("MOUNTPROG"));
			free(orignfsdirname);
			return (1);
		}
		clp->cl_auth = authsys_create_default();
		try.tv_sec = 20;
		try.tv_usec = 0;
		clnt_stat = clnt_call(clp, MOUNTPROC_UMNT, (xdrproc_t)xdr_dir,
		    nfsdirname, (xdrproc_t)xdr_void, (caddr_t)0, try);
		if (clnt_stat != RPC_SUCCESS) {
			warnx("%s: %s", hostp,
			    clnt_sperror(clp, "RPCMNT_UMOUNT"));
			free(orignfsdirname);
			return (1);
		}
		/*
		 * Remove the unmounted entry from /var/db/mounttab.
		 */
		if (read_mtab()) {
			clean_mtab(hostp, nfsdirname, vflag);
			if(!write_mtab(vflag))
				warnx("cannot remove mounttab entry %s:%s",
				    hostp, nfsdirname);
			free_mtab();
		}
		auth_destroy(clp->cl_auth);
		clnt_destroy(clp);
	}
示例#2
0
int
main(int argc, char **argv) {
	int ch, keep, success, pathlen;
	time_t expire, now;
	char *host, *path;
	struct mtablist *mtab;

	expire = 0;
	host = path = NULL;
	success = keep = verbose = 0;
	while ((ch = getopt(argc, argv, "h:kp:ve:")) != -1)
		switch (ch) {
		case 'h':
			host = optarg;
			break;
		case 'e':
			expire = atoi(optarg);
			break;
		case 'k':
			keep = 1;
			break;
		case 'p':
			path = optarg;
			break;
		case 'v':
			verbose = 1;
			break;
		case '?':
			usage();
		default:
			break;
		}
	argc -= optind;
	argv += optind;

	/* Default expiretime is one day */
	if (expire == 0)
		expire = 86400;
	time(&now);

	/* Read PATH_MOUNTTAB. */
	if (!read_mtab()) {
		if (verbose)
			warnx("no mounttab entries (%s does not exist)",
			    PATH_MOUNTTAB);
		mtabhead = NULL;
	}

	if (host == NULL && path == NULL) {
		/* Check each entry and do any necessary unmount RPCs. */
		for (mtab = mtabhead; mtab != NULL; mtab = mtab->mtab_next) {
			if (*mtab->mtab_host == '\0')
				continue;
			if (mtab->mtab_time + expire < now) {
				/* Clear expired entry. */
				if (verbose)
					warnx("remove expired entry %s:%s",
					    mtab->mtab_host, mtab->mtab_dirp);
				bzero(mtab->mtab_host,
				    sizeof(mtab->mtab_host));
				continue;
			}
			if (keep && is_mounted(mtab->mtab_host,
			    mtab->mtab_dirp)) {
				if (verbose)
					warnx("skip entry %s:%s",
					    mtab->mtab_host, mtab->mtab_dirp);
				continue;
			}
			if (do_umount(mtab->mtab_host, mtab->mtab_dirp)) {
				if (verbose)
					warnx("umount RPC for %s:%s succeeded",
					    mtab->mtab_host, mtab->mtab_dirp);
				/* Remove all entries for this host + path. */
				clean_mtab(mtab->mtab_host, mtab->mtab_dirp,
				    verbose);
			}
		}
		success = 1;
	} else {
		if (host == NULL && path != NULL)
			/* Missing hostname. */
			usage();
		if (path == NULL) {
			/* Do a RPC UMNTALL for this specific host */
			success = do_umntall(host);
			if (verbose && success)
				warnx("umntall RPC for %s succeeded", host);
		} else {
			/* Do a RPC UMNTALL for this specific mount */
			for (pathlen = strlen(path);
			    pathlen > 1 && path[pathlen - 1] == '/'; pathlen--)
				path[pathlen - 1] = '\0';
			success = do_umount(host, path);
			if (verbose && success)
				warnx("umount RPC for %s:%s succeeded", host,
				    path);
		}
		/* If successful, remove any corresponding mounttab entries. */
		if (success)
			clean_mtab(host, path, verbose);
	}
	/* Write and unlink PATH_MOUNTTAB if necessary */
	if (success)
		success = write_mtab(verbose);
	free_mtab();
	exit (success ? 0 : 1);
}
示例#3
0
int
umountfs(char *name, char **typelist)
{
	enum clnt_stat clnt_stat;
	struct hostent *hp;
	struct mtablist *mtab;
	struct sockaddr_in saddr;
	struct timeval pertry, try;
	CLIENT *clp;
	size_t len;
	int so, speclen, do_rpc;
	char *mntonname, *mntfromname;
	char *mntfromnamerev;
	char *nfsdirname, *orignfsdirname;
	char *resolved, realname[MAXPATHLEN];
	char *type, *delimp, *hostp, *origname;

	len = 0;
	mtab = NULL;
	mntfromname = mntonname = delimp = hostp = orignfsdirname = NULL;

	/*
	 * 1. Check if the name exists in the mounttable.
	 */
	(void)checkmntlist(name, &mntfromname, &mntonname, &type);
	/*
	 * 2. Remove trailing slashes if there are any. After that
	 * we look up the name in the mounttable again.
	 */
	if (mntfromname == NULL && mntonname == NULL) {
		speclen = strlen(name);
		for (speclen = strlen(name); 
		    speclen > 1 && name[speclen - 1] == '/';
		    speclen--)
			name[speclen - 1] = '\0';
		(void)checkmntlist(name, &mntfromname, &mntonname, &type);
		resolved = name;
		/* Save off original name in origname */
		if ((origname = strdup(name)) == NULL)
			err(1, "strdup");
		/*
		 * 3. Check if the deprecated nfs-syntax with an '@'
		 * has been used and translate it to the ':' syntax.
		 * Look up the name in the mounttable again.
		 */
		if (mntfromname == NULL && mntonname == NULL) {
			if ((delimp = strrchr(name, '@')) != NULL) {
				hostp = delimp + 1;
				if (*hostp != '\0') {
					/*
					 * Make both '@' and ':'
					 * notations equal 
					 */
					char *host = strdup(hostp);
					len = strlen(hostp);
					if (host == NULL)
						err(1, "strdup");
					memmove(name + len + 1, name,
					    (size_t)(delimp - name));
					name[len] = ':';
					memmove(name, host, len);
					free(host);
				}
				for (speclen = strlen(name); 
				    speclen > 1 && name[speclen - 1] == '/';
				    speclen--)
					name[speclen - 1] = '\0';
				name[len + speclen + 1] = '\0';
				(void)checkmntlist(name, &mntfromname,
				    &mntonname, &type);
				resolved = name;
			}
			/*
			 * 4. Check if a relative mountpoint has been
			 * specified. This should happen as last check,
			 * the order is important. To prevent possible
			 * nfs-hangs, we just call realpath(3) on the
			 * basedir of mountpoint and add the dirname again.
			 * Check the name in mounttable one last time.
			 */
			if (mntfromname == NULL && mntonname == NULL) {
				(void)strcpy(name, origname);
				if ((getrealname(name, realname)) != NULL) {
					(void)checkmntlist(realname,
					    &mntfromname, &mntonname, &type);
					resolved = realname;
				}
				/*
				 * All tests failed, return to main()
				 */
				if (mntfromname == NULL && mntonname == NULL) {
					(void)strcpy(name, origname);
					warnx("%s: not currently mounted",
					    origname);
					free(origname);
					return (1);
				}
			}
		}
		free(origname);
	} else
		resolved = name;

	if (checkvfsname(type, typelist))
		return (1);

	hp = NULL;
	nfsdirname = NULL;
	if (!strcmp(type, "nfs")) {
		if ((nfsdirname = strdup(mntfromname)) == NULL)
			err(1, "strdup");
		orignfsdirname = nfsdirname;
		if ((delimp = strchr(nfsdirname, ':')) != NULL) {
			*delimp = '\0';
			hostp = nfsdirname;
			if ((hp = gethostbyname(hostp)) == NULL) {
				warnx("can't get net id for host");
			}
			nfsdirname = delimp + 1;
		}
	}
	/*
	 * Check if the reverse entrys of the mounttable are really the
	 * same as the normal ones.
	 */
	if ((mntfromnamerev = strdup(getmntname(getmntname(mntfromname,
	    NULL, MNTON, &type, NAME), NULL, MNTFROM, &type, NAME))) == NULL)
		err(1, "strdup");
	/*
	 * Mark the uppermost mount as unmounted.
	 */
	(void)getmntname(mntfromname, mntonname, NOTHING, &type, MARK);
	/*
	 * If several equal mounts are in the mounttable, check the order
	 * and warn the user if necessary.
	 */
	if (strcmp(mntfromnamerev, mntfromname ) != 0 &&
	    strcmp(resolved, mntonname) != 0) {
		warnx("cannot umount %s, %s\n        "
		    "is mounted there, umount it first",
		    mntonname, mntfromnamerev);

		/* call getmntname again to set mntcheck[i] to 0 */
		(void)getmntname(mntfromname, mntonname,
		    NOTHING, &type, UNMARK);
		return (1);
	}
	free(mntfromnamerev);
	/*
	 * Check if we have to start the rpc-call later.
	 * If there are still identical nfs-names mounted,
	 * we skip the rpc-call. Obviously this has to
	 * happen before unmount(2), but it should happen
	 * after the previous namecheck.
	 */
	if (strcmp(type, "nfs") == 0 && getmntname(mntfromname, NULL, NOTHING,
	    &type, COUNT) != NULL)
		do_rpc = 1;
	else
		do_rpc = 0;
	if (!namematch(hp))
		return (1);
	if (unmount(mntonname, fflag) != 0 ) {
		warn("unmount of %s failed", mntonname);
		return (1);
	}
	if (vflag)
		(void)printf("%s: unmount from %s\n", mntfromname, mntonname);
	/*
	 * Report to mountd-server which nfsname
	 * has been unmounted.
	 */
	if (hp != NULL && !(fflag & MNT_FORCE) && do_rpc) {
		memset(&saddr, 0, sizeof(saddr));
		saddr.sin_family = AF_INET;
		saddr.sin_port = 0;
		memmove(&saddr.sin_addr, hp->h_addr, 
		    MIN(hp->h_length, sizeof(saddr.sin_addr)));
		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,
		    nfsdirname, xdr_void, (caddr_t)0, try);
		if (clnt_stat != RPC_SUCCESS) {
			clnt_perror(clp, "Bad MNT RPC");
			return (1);
		}
		/*
		 * Remove the unmounted entry from /var/db/mounttab.
		 */
		if (read_mtab(mtab)) {
			mtab = mtabhead;
			clean_mtab(hostp, nfsdirname);
			if(!write_mtab())
				warnx("cannot remove entry %s:%s",
				    hostp, nfsdirname);
			free_mtab();
		}
		free(orignfsdirname);
		auth_destroy(clp->cl_auth);
		clnt_destroy(clp);
	}