/*
* 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);
}
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);
}
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);
}
