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NetBSD/usr.sbin/amd/fixmount/fixmount.c

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/* $NetBSD: fixmount.c,v 1.3 1997/10/26 00:25:34 christos Exp $ */
/*
* Copyright (c) 1997 Erez Zadok
* Copyright (c) 1990 Jan-Simon Pendry
* Copyright (c) 1990 Imperial College of Science, Technology & Medicine
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry at Imperial College, London.
*
* 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.
*
* %W% (Berkeley) %G%
*
* Id: fixmount.c,v 5.2.2.2 1992/05/31 16:35:45 jsp Exp
*
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <am_defs.h>
#define CREATE_TIMEOUT 2 /* seconds */
#define CALL_TIMEOUT 5 /* seconds */
#ifndef INADDR_NONE
# define INADDR_NONE 0xffffffff
#endif /* not INADDR_NONE */
/* Constant defs */
#define ALL 1
#define DIRS 2
#define DODUMP 0x1
#define DOEXPORTS 0x2
#define DOREMOVE 0x4
#define DOVERIFY 0x8
#define DOREMALL 0x10
extern int fixmount_check_mount(char *host, struct in_addr hostaddr, char *path);
static char dir_path[NFS_MAXPATHLEN];
static char thishost[MAXHOSTNAMELEN] = "";
static exports mntexports;
static int quiet = 0;
static int type = 0;
static jmp_buf before_rpc;
static mountlist mntdump;
static struct in_addr thisaddr;
static CLIENT *clnt_create_timeout(char *, struct timeval *);
RETSIGTYPE create_timeout(int);
int is_same_host(char *, char *, struct in_addr);
int main(int, char *[]);
int remove_all(CLIENT *, char *);
int remove_mount(CLIENT *, char *, mountlist, int);
void fix_rmtab(CLIENT *, char *, mountlist, int, int);
void print_dump(mountlist);
void usage(void);
/* dummy variables */
char *progname;
char hostname[MAXHOSTNAMELEN];
int orig_umask, foreground, debug_flags;
pid_t mypid;
serv_state amd_state;
void
usage(void)
{
fprintf(stderr, "usage: fixmount [-adervAqf] [-h hostname] host ...\n");
exit(1);
}
/*
* Check hostname against other name and its IP address
*/
int
is_same_host(char *name1, char *name2, struct in_addr addr2)
{
if (strcasecmp(name1, name2) == 0) {
return 1;
} else if (addr2.s_addr == INADDR_NONE) {
return 0;
} else {
static char lasthost[MAXHOSTNAMELEN] = "";
static struct in_addr addr1;
struct hostent *he;
/*
* To save nameserver lookups, and because this function
* is typically called repeatedly on the same names,
* cache the last lookup result and reuse it if possible.
*/
if (strcasecmp(name1, lasthost) == 0) {
return (addr1.s_addr == addr2.s_addr);
} else if (!(he = gethostbyname(name1))) {
return 0;
} else {
strncpy(lasthost, name1, sizeof(lasthost) - 1);
memcpy(&addr1, he->h_addr, sizeof(addr1));
return (addr1.s_addr == addr2.s_addr);
}
}
}
/*
* Print the binary tree in inorder so that output is sorted.
*/
void
print_dump(mountlist mp)
{
if (mp == NULL)
return;
if (is_same_host(mp->ml_hostname, thishost, thisaddr)) {
switch (type) {
case ALL:
printf("%s:%s\n", mp->ml_hostname, mp->ml_directory);
break;
case DIRS:
printf("%s\n", mp->ml_directory);
break;
default:
printf("%s\n", mp->ml_hostname);
break;
};
}
if (mp->ml_next)
print_dump(mp->ml_next);
}
/*
* remove entry from remote rmtab
*/
int
remove_mount(CLIENT *client, char *host, mountlist ml, int fixit)
{
enum clnt_stat estat;
struct timeval tv;
char *pathp = dir_path;
strncpy(dir_path, ml->ml_directory, sizeof(dir_path));
if (!fixit) {
printf("%s: bogus mount %s:%s\n", host, ml->ml_hostname, ml->ml_directory);
fflush(stdout);
} else {
printf("%s: removing %s:%s\n", host, ml->ml_hostname, ml->ml_directory);
fflush(stdout);
tv.tv_sec = CALL_TIMEOUT;
tv.tv_usec = 0;
if ((estat = clnt_call(client,
MOUNTPROC_UMNT,
(XDRPROC_T_TYPE) xdr_dirpath,
(char *) &pathp,
(XDRPROC_T_TYPE) xdr_void,
(char *) 0,
tv)) != RPC_SUCCESS) {
fprintf(stderr, "%s:%s MOUNTPROC_UMNT: ",
host, ml->ml_directory);
clnt_perrno(estat);
fflush(stderr);
return -1;
}
}
return 0;
}
/*
* fix mount list on remote host
*/
void
fix_rmtab(CLIENT *client, char *host, mountlist mp, int fixit, int force)
{
mountlist p;
struct hostent *he;
struct in_addr hostaddr;
/*
* Obtain remote address for comparisons
*/
if ((he = gethostbyname(host))) {
memcpy(&hostaddr, he->h_addr, sizeof(hostaddr));
} else {
hostaddr.s_addr = INADDR_NONE;
}
for (p = mp; p; p = p->ml_next) {
if (is_same_host(p->ml_hostname, thishost, thisaddr)) {
if (force || !fixmount_check_mount(host, hostaddr, p->ml_directory))
remove_mount(client, host, p, fixit);
}
}
}
/*
* remove all entries from remote rmtab
*/
int
remove_all(CLIENT *client, char *host)
{
enum clnt_stat estat;
struct timeval tv;
printf("%s: removing ALL\n", host);
fflush(stdout);
tv.tv_sec = CALL_TIMEOUT;
tv.tv_usec = 0;
if ((estat = clnt_call(client,
MOUNTPROC_UMNTALL,
(XDRPROC_T_TYPE) xdr_void,
(char *) 0,
(XDRPROC_T_TYPE) xdr_void,
(char *) 0,
tv)) != RPC_SUCCESS) {
/*
* RPC_SYSTEMERROR is returned even if all went well
*/
if (estat != RPC_SYSTEMERROR) {
fprintf(stderr, "%s MOUNTPROC_UMNTALL: ", host);
clnt_perrno(estat);
fflush(stderr);
return -1;
}
}
return 0;
}
/*
* This command queries the NFS mount daemon for it's mount list and/or
* it's exports list and prints them out.
* See "NFS: Network File System Protocol Specification, RFC1094, Appendix A"
* for detailed information on the protocol.
*/
int
main(int argc, char *argv[])
{
AUTH *auth;
CLIENT *client;
char *host;
enum clnt_stat estat;
exports exp;
extern char *optarg;
extern int optind;
groups grp;
int ch;
int force = 0;
int morethanone;
register int rpcs = 0;
struct timeval tv;
while ((ch = getopt(argc, argv, "adervAqfh:")) != -1)
switch ((char) ch) {
case 'a':
if (type == 0) {
type = ALL;
rpcs |= DODUMP;
} else
usage();
break;
case 'd':
if (type == 0) {
type = DIRS;
rpcs |= DODUMP;
} else
usage();
break;
case 'e':
rpcs |= DOEXPORTS;
break;
case 'r':
rpcs |= DOREMOVE;
break;
case 'A':
rpcs |= DOREMALL;
break;
case 'v':
rpcs |= DOVERIFY;
break;
case 'q':
quiet = 1;
break;
case 'f':
force = 1;
break;
case 'h':
strncpy(thishost, optarg, sizeof(thishost));
thishost[sizeof(thishost) - 1] = '\0';
break;
case '?':
default:
usage();
}
if (optind == argc)
usage();
if (rpcs == 0)
rpcs = DODUMP;
if (!*thishost) {
struct hostent *he;
if (gethostname(thishost, sizeof(thishost)) < 0) {
perror("gethostname");
exit(1);
}
/*
* We need the hostname as it appears to the other side's
* mountd, so get our own hostname by reverse address
* resolution.
*/
if (!(he = gethostbyname(thishost))) {
fprintf(stderr, "gethostbyname failed on %s\n",
thishost);
exit(1);
}
memcpy(&thisaddr, he->h_addr, sizeof(thisaddr));
if (!(he = gethostbyaddr((char *) &thisaddr, sizeof(thisaddr),
he->h_addrtype))) {
fprintf(stderr, "gethostbyaddr failed on %s\n",
inet_ntoa(thisaddr));
exit(1);
}
strncpy(thishost, he->h_name, sizeof(thishost));
thishost[sizeof(thishost) - 1] = '\0';
} else {
thisaddr.s_addr = INADDR_NONE;
}
if (!(auth = authunix_create_default())) {
fprintf(stderr, "couldn't create authentication handle\n");
exit(1);
}
morethanone = (optind + 1 < argc);
for (; optind < argc; optind++) {
host = argv[optind];
tv.tv_sec = CREATE_TIMEOUT;
tv.tv_usec = 0;
if (!(client = clnt_create_timeout(host, &tv)))
continue;
client->cl_auth = auth;
tv.tv_sec = CALL_TIMEOUT;
tv.tv_usec = 0;
if (rpcs & (DODUMP | DOREMOVE | DOVERIFY))
if ((estat = clnt_call(client,
MOUNTPROC_DUMP,
(XDRPROC_T_TYPE) xdr_void,
(char *) 0,
(XDRPROC_T_TYPE) xdr_mountlist,
(char *) &mntdump,
tv)) != RPC_SUCCESS) {
fprintf(stderr, "%s: MOUNTPROC_DUMP: ", host);
clnt_perrno(estat);
fflush(stderr);
mntdump = NULL;
goto next;
}
if (rpcs & DOEXPORTS)
if ((estat = clnt_call(client,
MOUNTPROC_EXPORT,
(XDRPROC_T_TYPE) xdr_void,
(char *) 0,
(XDRPROC_T_TYPE) xdr_exports,
(char *) &mntexports,
tv)) != RPC_SUCCESS) {
fprintf(stderr, "%s: MOUNTPROC_EXPORT: ", host);
clnt_perrno(estat);
fflush(stderr);
mntexports = NULL;
goto next;
}
/* Now just print out the results */
if ((rpcs & (DODUMP | DOEXPORTS)) &&
morethanone) {
printf(">>> %s <<<\n", host);
fflush(stdout);
}
if (rpcs & DODUMP) {
print_dump(mntdump);
}
if (rpcs & DOEXPORTS) {
exp = mntexports;
while (exp) {
printf("%-35s", exp->ex_dir);
grp = exp->ex_groups;
if (grp == NULL) {
printf("Everyone\n");
} else {
while (grp) {
printf("%s ", grp->gr_name);
grp = grp->gr_next;
}
printf("\n");
}
exp = exp->ex_next;
}
}
if (rpcs & DOVERIFY)
fix_rmtab(client, host, mntdump, 0, force);
if (rpcs & DOREMOVE)
fix_rmtab(client, host, mntdump, 1, force);
if (rpcs & DOREMALL)
remove_all(client, host);
next:
if (mntdump)
(void) clnt_freeres(client,
(XDRPROC_T_TYPE) xdr_mountlist,
(char *) &mntdump);
if (mntexports)
(void) clnt_freeres(client,
(XDRPROC_T_TYPE) xdr_exports,
(char *) &mntexports);
clnt_destroy(client);
}
exit(0);
return 0; /* should never reach here */
}
RETSIGTYPE
create_timeout(int sig)
{
signal(SIGALRM, SIG_DFL);
longjmp(before_rpc, 1);
}
static CLIENT *
clnt_create_timeout(char *host, struct timeval *to)
{
CLIENT *client;
if (setjmp(before_rpc)) {
if (!quiet) {
fprintf(stderr, "%s: ", host);
clnt_perrno(RPC_TIMEDOUT);
fprintf(stderr, "\n");
fflush(stderr);
}
return NULL;
}
signal(SIGALRM, create_timeout);
ualarm(to->tv_sec * 1000000 + to->tv_usec, 0);
/*
* Try TCP first (in case return data is large), then UDP
*/
if (!(client = clnt_create(host, MOUNTPROG, MOUNTVERS, "tcp")) &&
! (client = clnt_create(host, MOUNTPROG, MOUNTVERS, "udp"))) {
ualarm(0, 0);
if (!quiet) {
clnt_pcreateerror(host);
fflush(stderr);
}
return NULL;
}
ualarm(0, 0);
return client;
}
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