/* $NetBSD: fixmount.c,v 1.1.1.3 2015/01/17 16:34:16 christos Exp $ */ /* * Copyright (c) 1997-2014 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. 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. * * * File: am-utils/fixmount/fixmount.c * */ #ifdef HAVE_CONFIG_H # include #endif /* HAVE_CONFIG_H */ #include #define CREATE_TIMEOUT 2 /* seconds */ #define CALL_TIMEOUT 5 /* seconds */ /* 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 localhost[] = "localhost"; static char thishost[MAXHOSTNAMELEN + 1] = ""; 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); 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 { xstrlcpy(lasthost, name1, sizeof(lasthost)); 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; xstrlcpy(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 *) NULL, 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 *) NULL, (XDRPROC_T_TYPE) xdr_void, (char *) NULL, 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': xstrlcpy(thishost, optarg, sizeof(thishost)); 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); } thishost[sizeof(thishost) - 1] = '\0'; /* * 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); } xstrlcpy(thishost, he->h_name, sizeof(thishost)); } 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 *) NULL, (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 *) NULL, (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); } #ifndef HAVE_TRANSPORT_TYPE_TLI /* * inetresport creates a datagram socket and attempts to bind it to a * secure port. * returns: The bound socket, or -1 to indicate an error. */ static int inetresport(int ty) { int alport; struct sockaddr_in addr; int fd; memset(&addr, 0, sizeof(addr)); /* as per POSIX, sin_len need not be set (used internally by kernel) */ addr.sin_family = AF_INET; /* use internet address family */ addr.sin_addr.s_addr = INADDR_ANY; if ((fd = socket(AF_INET, ty, 0)) < 0) return -1; for (alport = IPPORT_RESERVED - 1; alport > IPPORT_RESERVED / 2 + 1; alport--) { addr.sin_port = htons((u_short) alport); if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) >= 0) return fd; if (errno != EADDRINUSE) { close(fd); return -1; } } close(fd); errno = EAGAIN; return -1; } /* * Privsock() calls inetresport() to attempt to bind a socket to a secure * port. If inetresport() fails, privsock returns a magic socket number which * indicates to RPC that it should make its own socket. * returns: A privileged socket # or RPC_ANYSOCK. */ static int privsock(int ty) { int sock = inetresport(ty); if (sock < 0) { errno = 0; /* Couldn't get a secure port, let RPC make an insecure one */ sock = RPC_ANYSOCK; } return sock; } #endif /* not HAVE_TRANSPORT_TYPE_TLI */ static CLIENT * clnt_create_timeout(char *host, struct timeval *tvp) { CLIENT *clnt; struct sockaddr_in host_addr; struct hostent *hp; #ifndef HAVE_TRANSPORT_TYPE_TLI int s; #endif /* not HAVE_TRANSPORT_TYPE_TLI */ 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(tvp->tv_sec * 1000000 + tvp->tv_usec, 0); /* * Get address of host */ if ((hp = gethostbyname(host)) == 0 && !STREQ(host, localhost)) { fprintf(stderr, "can't get address of %s\n", host); return NULL; } memset(&host_addr, 0, sizeof(host_addr)); /* as per POSIX, sin_len need not be set (used internally by kernel) */ host_addr.sin_family = AF_INET; if (hp) { memmove((voidp) &host_addr.sin_addr, (voidp) hp->h_addr, sizeof(host_addr.sin_addr)); } else { /* fake "localhost" */ host_addr.sin_addr.s_addr = htonl(0x7f000001); } #ifdef HAVE_TRANSPORT_TYPE_TLI /* try TCP first (in case return data is large), then UDP */ clnt = clnt_create(host, MOUNTPROG, MOUNTVERS, "tcp"); if (!clnt) clnt = clnt_create(host, MOUNTPROG, MOUNTVERS, "udp"); #else /* not HAVE_TRANSPORT_TYPE_TLI */ s = RPC_ANYSOCK; clnt = clnttcp_create(&host_addr, MOUNTPROG, MOUNTVERS, &s, 0, 0); if (!clnt) { /* XXX: do we need to close(s) ? */ s = privsock(SOCK_DGRAM); clnt = clntudp_create(&host_addr, MOUNTPROG, MOUNTVERS, *tvp, &s); } #endif /* not HAVE_TRANSPORT_TYPE_TLI */ if (!clnt) { ualarm(0, 0); if (!quiet) { clnt_pcreateerror(host); fflush(stderr); } return NULL; } ualarm(0, 0); return clnt; }