2.11BSD/src/sbin/umount/umount.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.
*/
#if !defined(lint) && defined(DOSCCS)
static char copyright[] =
"@(#) Copyright (c) 1980, 1989, 1993\n\
The Regents of the University of California. All rights reserved.\n";
static char sccsid[] = "@(#)umount.c 8.3.1 (2.11BSD) 1996/1/16";
#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/mount.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();
char *getmntname();
void maketypelist();
int selected();
int namematch();
int umountall();
int umountfs();
void usage();
int
main(argc, argv)
int argc;
register char *argv[];
{
int all, ch, errs;
/* Start disks transferring immediately. */
sync();
all = 0;
while ((ch = getopt(argc, argv, "aFft:v")) != EOF)
switch (ch) {
case 'a':
all = 1;
break;
case 'F':
fake = 1;
break;
case 'f':
#ifdef notnow
fflag = MNT_FORCE;
#endif
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();
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()
{
register struct fstab *fs;
int rval, type;
register 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.
*/
cp = (char *)malloc((size_t)strlen(fs->fs_file) + 1);
if (cp == NULL)
err(1, NULL);
(void)strcpy(cp, fs->fs_file);
rval = umountall();
return (umountfs(cp) || rval);
}
return (0);
}
int
umountfs(name)
char *name;
{
struct stat sb;
int type;
register char *mntpt;
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 ((sb.st_mode & S_IFMT) == S_IFBLK) {
if ((mntpt = getmntname(name, MNTON, &type)) == NULL) {
warnx("%s: not currently mounted", name);
return (1);
}
} else if ((sb.st_mode & S_IFMT) == S_IFDIR) {
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 (vflag)
(void)printf("%s: unmount from %s\n", name, mntpt);
if (fake)
return (0);
if (umount(name) < 0) {
warn("%s on %s", name, mntpt);
return (1);
}
return (0);
}
char *
getmntname(name, what, type)
char *name;
mntwhat what;
int *type;
{
struct statfs *mntbuf;
register 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)
register char *fslist;
{
register 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 = (int *)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 *namelist[] = INITMOUNTNAMES;
register char **cp;
for (cp = namelist; *cp; ++cp)
if (strcmp(name, *cp) == 0)
return (cp - namelist);
return (MOUNT_NONE);
}
void
usage()
{
(void)fprintf(stderr,
"usage: %s\n %s\n",
"umount [-fv] [-t fstypelist] special | node",
"umount -a[fv] [-t fstypelist]");
exit(1);
}