4.3BSD-Reno/src/sbin/umount/umount.c
/*-
* Copyright (c) 1980, 1989 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that: (1) source distributions retain this entire copyright
* notice and comment, and (2) distributions including binaries display
* the following acknowledgement: ``This product includes software
* developed by the University of California, Berkeley and its contributors''
* in the documentation or other materials provided with the distribution
* and in all advertising materials mentioning features or use of this
* software. 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980, 1989 The Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)umount.c 5.14 (Berkeley) 6/1/90";
#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/mount.h>
#ifdef NFS
#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>
#endif
#include <fstab.h>
#include <stdio.h>
#include <string.h>
#ifdef NFS
int xdr_dir();
char *nfshost;
#endif
int vflag, all, errs, fake;
int fflag = MNT_NOFORCE;
char *getmntname();
#define MNTON 1
#define MNTFROM 2
#define MNTTYPE 3
int *typelist, *maketypelist();
main(argc, argv)
int argc;
char **argv;
{
extern char *optarg;
extern int optind;
int ch;
sync();
while ((ch = getopt(argc, argv, "afFh:t:v")) != EOF)
switch((char)ch) {
case 'v':
vflag++;
break;
case 'f':
fflag = MNT_FORCE;
break;
case 'F':
fake++;
break;
case 'a':
all++;
break;
case 't':
typelist = maketypelist(optarg);
break;
#ifdef NFS
case 'h':
/* -h flag implies -a, and "-t nfs" if no -t flag */
nfshost = optarg;
all++;
if (typelist == NULL)
typelist = maketypelist("nfs");
break;
#endif /* NFS */
case '?':
default:
usage();
/* NOTREACHED */
}
argc -= optind;
argv += optind;
if (argc == 0 && !all)
usage();
if (all) {
if (argc > 0)
usage();
if (setfsent() == 0)
perror(FSTAB), exit(1);
umountall(typelist);
exit(0);
} else
setfsent();
while (argc > 0) {
if (umountfs(*argv++, 0) == 0)
errs++;
argc--;
}
exit(errs);
}
usage()
{
fprintf(stderr,
"%s\n%s\n",
"Usage: umount [-fv] special | node",
#ifndef NFS
" or umount -a[fv] [-t fstypelist]"
#else
" or umount -a[fv] [-h host] [-t fstypelist]"
#endif
);
exit(1);
}
umountall(typelist)
char **typelist;
{
register struct fstab *fs;
struct fstab *allocfsent();
if ((fs = getfsent()) == (struct fstab *)0)
return;
fs = allocfsent(fs);
umountall(typelist);
if (strcmp(fs->fs_file, "/") == 0) {
freefsent(fs);
return;
}
if (strcmp(fs->fs_type, FSTAB_RW) &&
strcmp(fs->fs_type, FSTAB_RO) &&
strcmp(fs->fs_type, FSTAB_RQ)) {
freefsent(fs);
return;
}
(void) umountfs(fs->fs_file, typelist);
freefsent(fs);
}
struct fstab *
allocfsent(fs)
register struct fstab *fs;
{
register struct fstab *new;
register char *cp;
char *malloc();
new = (struct fstab *)malloc((unsigned)sizeof (*fs));
cp = malloc((unsigned)strlen(fs->fs_file) + 1);
strcpy(cp, fs->fs_file);
new->fs_file = cp;
cp = malloc((unsigned)strlen(fs->fs_type) + 1);
strcpy(cp, fs->fs_type);
new->fs_type = cp;
cp = malloc((unsigned)strlen(fs->fs_spec) + 1);
strcpy(cp, fs->fs_spec);
new->fs_spec = cp;
new->fs_passno = fs->fs_passno;
new->fs_freq = fs->fs_freq;
return (new);
}
freefsent(fs)
register struct fstab *fs;
{
if (fs->fs_file)
free(fs->fs_file);
if (fs->fs_spec)
free(fs->fs_spec);
if (fs->fs_type)
free(fs->fs_type);
free((char *)fs);
}
umountfs(name, typelist)
char *name;
int *typelist;
{
char *mntpt;
struct stat stbuf;
int type;
#ifdef NFS
register CLIENT *clp;
struct hostent *hp = 0;
struct sockaddr_in saddr;
struct timeval pertry, try;
enum clnt_stat clnt_stat;
int so = RPC_ANYSOCK;
char *hostp, *delimp;
#endif /* NFS */
if (stat(name, &stbuf) < 0) {
if ((mntpt = getmntname(name, MNTON, &type)) == 0)
return (0);
} else if ((stbuf.st_mode & S_IFMT) == S_IFBLK) {
if ((mntpt = getmntname(name, MNTON, &type)) == 0)
return (0);
} else if ((stbuf.st_mode & S_IFMT) == S_IFDIR) {
mntpt = name;
if ((name = getmntname(mntpt, MNTFROM, &type)) == 0)
return (0);
} else {
fprintf(stderr, "%s: not a directory or special device\n",
name);
return (0);
}
if (badtype(type, typelist))
return(1);
#ifdef NFS
if ((delimp = index(name, '@')) != NULL) {
hostp = delimp + 1;
*delimp = '\0';
hp = gethostbyname(hostp);
*delimp = '@';
} else if ((delimp = index(name, ':')) != NULL) {
*delimp = '\0';
hostp = name;
hp = gethostbyname(hostp);
name = delimp+1;
*delimp = ':';
}
if (!namematch(hp, nfshost))
return(1);
#endif /* NFS */
if (!fake && unmount(mntpt, fflag) < 0) {
perror(mntpt);
return (0);
}
if (vflag)
fprintf(stderr, "%s: Unmounted from %s\n", name, mntpt);
#ifdef NFS
if (!fake && hp != NULL && (fflag & MNT_FORCE) == 0) {
*delimp = '\0';
bcopy(hp->h_addr,(caddr_t)&saddr.sin_addr,hp->h_length);
saddr.sin_family = AF_INET;
saddr.sin_port = 0;
pertry.tv_sec = 3;
pertry.tv_usec = 0;
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);
}
#endif /* NFS */
return (1);
}
char *
getmntname(name, what, type)
char *name;
int what;
int *type;
{
int mntsize, i;
struct statfs *mntbuf;
if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) {
perror("umount");
return (0);
}
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);
}
}
fprintf(stderr, "%s: not currently mounted\n", name);
return (0);
}
static int skipvfs;
badtype(type, typelist)
int type;
int *typelist;
{
if (typelist == 0)
return(0);
while (*typelist) {
if (type == *typelist)
return(skipvfs);
typelist++;
}
return(!skipvfs);
}
int *
maketypelist(fslist)
char *fslist;
{
register char *nextcp;
register int *av, i;
char *malloc();
if (fslist == NULL)
return(NULL);
if (fslist[0] == 'n' && fslist[1] == 'o') {
fslist += 2;
skipvfs = 1;
} else
skipvfs = 0;
for (i = 0, nextcp = fslist; *nextcp; nextcp++)
if (*nextcp == ',')
i++;
av = (int *)malloc((i+2) * sizeof(int));
if (av == NULL)
return(NULL);
for (i = 0; fslist; fslist = nextcp) {
if (nextcp = index(fslist, ','))
*nextcp++ = '\0';
if (strcmp(fslist, "ufs") == 0)
av[i++] = MOUNT_UFS;
else if (strcmp(fslist, "nfs") == 0)
av[i++] = MOUNT_NFS;
else if (strcmp(fslist, "mfs") == 0)
av[i++] = MOUNT_MFS;
else if (strcmp(fslist, "pc") == 0)
av[i++] = MOUNT_PC;
}
av[i++] = 0;
return(av);
}
#ifdef NFS
namematch(hp, nfshost)
struct hostent *hp;
char *nfshost;
{
register char *cp;
register char **np;
if (hp == NULL || nfshost == NULL)
return(1);
if (strcasecmp(nfshost, hp->h_name) == 0)
return(1);
if (cp = index(hp->h_name, '.')) {
*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 = index(*np, '.')) {
*cp = '\0';
if (strcasecmp(nfshost, *np) == 0)
return(1);
}
}
return(0);
}
/*
* xdr routines for mount rpc's
*/
xdr_dir(xdrsp, dirp)
XDR *xdrsp;
char *dirp;
{
return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN));
}
#endif /* NFS */