freebsd-dev/sbin/umount/umount.c
1997-06-19 14:44:24 +00:00

385 lines
9.0 KiB
C

/*-
* 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 8.8 (Berkeley) 5/8/95";
#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;
char *nfshost;
int checkvfsname __P((const char *, char **));
char *getmntname __P((char *, mntwhat, char **));
char **makevfslist __P((char *));
int selected __P((int));
int namematch __P((struct hostent *));
int umountall __P((char **));
int umountfs __P((char *, char **));
void usage __P((void));
int xdr_dir __P((XDR *, char *));
int
main(argc, argv)
int argc;
char *argv[];
{
int all, ch, errs, mnts;
char **typelist = NULL;
struct statfs *mntbuf;
/* Start disks transferring immediately. */
sync();
all = 0;
while ((ch = getopt(argc, argv, "AaFfh:t:v")) != -1)
switch (ch) {
case 'A':
all = 2;
break;
case 'a':
all = 1;
break;
case 'F':
fake = 1;
break;
case 'f':
fflag = MNT_FORCE;
break;
case 'h': /* -h implies -A. */
all = 2;
nfshost = optarg;
break;
case 't':
if (typelist != NULL)
errx(1, "only one -t option may be specified.");
typelist = makevfslist(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))
typelist = makevfslist("nfs");
switch (all) {
case 2:
if ((mnts = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) {
warn("getmntinfo");
errs = 1;
break;
}
for (errs = 0, mnts--; mnts > 0; mnts--) {
if (checkvfsname(mntbuf[mnts].f_fstypename, typelist))
continue;
if (umountfs(mntbuf[mnts].f_mntonname, typelist) != 0)
errs = 1;
}
break;
case 1:
if (setfsent() == 0)
err(1, "%s", _PATH_FSTAB);
errs = umountall(typelist);
break;
case 0:
for (errs = 0; *argv != NULL; ++argv)
if (umountfs(*argv, typelist) != 0)
errs = 1;
break;
}
exit(errs);
}
int
umountall(typelist)
char **typelist;
{
struct fstab *fs;
int rval, type;
char *cp;
struct vfsconf vfc;
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 (getvfsbyname(fs->fs_vfstype, &vfc) < 0) {
warnx("%s: unknown mount type", fs->fs_vfstype);
continue;
}
if (checkvfsname(fs->fs_vfstype, typelist))
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(typelist);
return (umountfs(cp, typelist) || rval);
}
return (0);
}
int
umountfs(name, typelist)
char *name;
char **typelist;
{
enum clnt_stat clnt_stat;
struct hostent *hp;
struct sockaddr_in saddr;
struct stat sb;
struct timeval pertry, try;
CLIENT *clp;
int so;
char *type, *delimp, *hostp, *mntpt, rname[MAXPATHLEN];
if (realpath(name, rname) == NULL) {
/* Continue and let the system call check it... */
strcpy(rname, name);
}
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 (checkvfsname(type, typelist))
return (1);
hp = NULL;
if (!strcmp(type, "nfs")) {
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 = ':';
}
}
if (!namematch(hp))
return (1);
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;
char **type;
{
static struct statfs *mntbuf;
static int mntsize;
int i;
if (mntbuf == NULL &&
(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_fstypename;
return (mntbuf[i].f_mntonname);
}
if ((what == MNTFROM) && !strcmp(mntbuf[i].f_mntonname, name)) {
if (type)
*type = mntbuf[i].f_fstypename;
return (mntbuf[i].f_mntfromname);
}
}
return (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, "%s\n%s\n",
"usage: umount [-fv] special | node",
" umount -a | -A [-fv] [-h host] [-t type]");
exit(1);
}