diff options
Diffstat (limited to 'sbin/umount')
| -rw-r--r-- | sbin/umount/Makefile | 7 | ||||
| -rw-r--r-- | sbin/umount/umount.8 | 123 | ||||
| -rw-r--r-- | sbin/umount/umount.c | 421 |
3 files changed, 551 insertions, 0 deletions
diff --git a/sbin/umount/Makefile b/sbin/umount/Makefile new file mode 100644 index 0000000..9665a59 --- /dev/null +++ b/sbin/umount/Makefile @@ -0,0 +1,7 @@ +# @(#)Makefile 8.2 (Berkeley) 2/20/94 + +PROG= umount +DPADD= ${LIBRPC} +LDADD= -lrpc + +.include <bsd.prog.mk> diff --git a/sbin/umount/umount.8 b/sbin/umount/umount.8 new file mode 100644 index 0000000..234eb8f --- /dev/null +++ b/sbin/umount/umount.8 @@ -0,0 +1,123 @@ +.\" Copyright (c) 1980, 1989, 1991, 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. +.\" +.\" @(#)umount.8 8.1 (Berkeley) 2/20/94 +.\" +.Dd February 20, 1994 +.Dt UMOUNT 8 +.Os BSD 4 +.Sh NAME +.Nm umount +.Nd unmount file systems +.Sh SYNOPSIS +.Nm umount +.Op Fl fv +.Ar special | node +.Nm umount +.Fl a +.Op Fl fv +.Op Fl h Ar host +.Op Fl t Ar ufs | lfs | external_type +.Sh DESCRIPTION +The +.Nm umount +command +calls the +.Xr unmount 2 +system call to remove a +.Ar "special device" +or the remote node (rhost:path) from the file system tree at the point +.Ar node . +If either +.Ar special +or +.Ar node +are not provided, the appropriate information is taken from the +.Xr fstab 5 +file. +.Pp +The options are as follows: +.Bl -tag -width indent +.It Fl a +All of the file systems described in +.Xr fstab 5 +are unmounted. +.It Fl f +The file system is forcibly unmounted. +Active special devices continue to work, +but all other files return errors if further accesses are attempted. +The root file system cannot be forcibly unmounted. +.It Fl h Ar host +Only filesystems mounted from the specified host will be +unmounted. +This option is implies the +.Fl a +option and, unless otherwise specified with the +.Fl t +option, will only unmount NFS filesystems. +.It Fl t Ar "ufs \\*(Ba lfs \\*(Ba external type" +Is used to indicate the actions should only be taken on +filesystems of the specified type. +More than one type may be specified in a comma separated list. +The list of filesystem types can be prefixed with +.Dq no +to specify the filesystem types for which action should +.Em not +be taken. +For example, the +.Nm umount +command: +.Bd -literal -offset indent +umount -a -t nfs,mfs +.Ed +.Pp +umounts all filesystems of the type +.Tn NFS +and +.Tn MFS . +.It Fl v +Verbose, additional information is printed out as each file system +is unmounted. +.El +.Sh FILES +.Bl -tag -width /etc/fstab -compact +.It Pa /etc/fstab +file system table +.El +.Sh SEE ALSO +.Xr unmount 2 , +.Xr fstab 5 , +.Xr mount 8 +.Sh HISTORY +A +.Nm umount +command appeared in +.At v6 . diff --git a/sbin/umount/umount.c b/sbin/umount/umount.c new file mode 100644 index 0000000..56660de --- /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); +} |
