utils/mount/nfsmount.c

   1 /*
   2  * nfsmount.c -- Linux NFS mount
   3  * Copyright (C) 1993 Rick Sladkey <jrs@world.std.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2, or (at your option)
   8  * any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * Wed Feb  8 12:51:48 1995, biro@yggdrasil.com (Ross Biro): allow all port
  16  * numbers to be specified on the command line.
  17  *
  18  * Fri, 8 Mar 1996 18:01:39, Swen Thuemmler <swen@uni-paderborn.de>:
  19  * Omit the call to connect() for Linux version 1.3.11 or later.
  20  *
  21  * Wed Oct  1 23:55:28 1997: Dick Streefland <dick_streefland@tasking.com>
  22  * Implemented the "bg", "fg" and "retry" mount options for NFS.
  23  *
  24  * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
  25  * - added Native Language Support
  26  *
  27  * Modified by Olaf Kirch and Trond Myklebust for new NFS code,
  28  * plus NFSv3 stuff.
  29  *
  30  * 2006-06-06 Amit Gud <agud@redhat.com>
  31  * - Moved with modifcations to nfs-utils/utils/mount from util-linux/mount.
  32  */
  33
  34 /*
  35  * nfsmount.c,v 1.1.1.1 1993/11/18 08:40:51 jrs Exp
  36  */
  37
  38 #include <ctype.h>
  39 #include <unistd.h>
  40 #include <stdio.h>
  41 #include <string.h>
  42 #include <stdlib.h>
  43 #include <errno.h>
  44 #include <netdb.h>
  45 #include <time.h>
  46 #include <rpc/rpc.h>
  47 #include <rpc/pmap_prot.h>
  48 #include <rpc/pmap_clnt.h>
  49 #include <sys/socket.h>
  50 #include <sys/time.h>
  51 #include <sys/utsname.h>
  52 #include <sys/stat.h>
  53 #include <netinet/in.h>
  54 #include <arpa/inet.h>
  55 #include <mntent.h>
  56 #include <sys/mount.h>
  57 #include <paths.h>
  58 #include <syslog.h>
  59
  60 #include "conn.h"
  61 #include "xcommon.h"
  62 #include "mount.h"
  63 #include "nfsumount.h"
  64 #include "nfs_mount.h"
  65 #include "mount_constants.h"
  66 #include "nls.h"
  67
  68 #ifdef HAVE_RPCSVC_NFS_PROT_H
  69 #include <rpcsvc/nfs_prot.h>
  70 #else
  71 #include <linux/nfs.h>
  72 #define nfsstat nfs_stat
  73 #endif
  74
  75 #ifndef NFS_PORT
  76 #define NFS_PORT 2049
  77 #endif
  78 #ifndef NFS_FHSIZE
  79 #define NFS_FHSIZE 32
  80 #endif
  81
  82 static char *nfs_strerror(int stat);
  83
  84 #define MAKE_VERSION(p,q,r)     (65536*(p) + 256*(q) + (r))
  85 #define MAX_NFSPROT ((nfs_mount_version >= 4) ? 3 : 2)
  86 #define MAX_MNTPROT ((nfs_mount_version >= 4) ? 3 : 2)
  87 #define HAVE_RELIABLE_TCP (nfs_mount_version >= 4)
  88
  89 #ifndef HAVE_INET_ATON
  90 #define inet_aton(a,b) (0)
  91 #endif
  92
  93 typedef dirpath mnt2arg_t;
  94 typedef dirpath mnt3arg_t;
  95 typedef dirpath mntarg_t;
  96
  97 typedef struct fhstatus  mnt2res_t;
  98 typedef struct mountres3 mnt3res_t;
  99 typedef union {
 100         mnt2res_t nfsv2;
 101         mnt3res_t nfsv3;
 102 } mntres_t;
 103
 104 static char errbuf[BUFSIZ];
 105 static char *erreob = &errbuf[BUFSIZ];
 106 extern int verbose;
 107 extern int sloppy;
 108
 109 /* Convert RPC errors into strings */
 110 int rpc_strerror(int);
 111 int rpc_strerror(int spos)
 112 {
 113         int cf_stat = rpc_createerr.cf_stat;
 114         int pos=0, cf_errno = rpc_createerr.cf_error.re_errno;
 115         char *ptr, *estr = clnt_sperrno(cf_stat);
 116         char *tmp;
 117
 118         if (estr) {
 119                 if ((ptr = index(estr, ':')))
 120                         estr = ++ptr;
 121
 122                 tmp = &errbuf[spos];
 123                 if (cf_stat == RPC_SYSTEMERROR)
 124                         pos = snprintf(tmp, (erreob - tmp),
 125                                 "System Error: %s", strerror(cf_errno));
 126                 else
 127                         pos = snprintf(tmp, (erreob - tmp), "RPC Error:%s", estr);
 128         }
 129         return (pos);
 130 }
 131 void mount_errors(char *, int, int);
 132 void mount_errors(char *server, int will_retry, int bg)
 133 {
 134         int pos = 0;
 135         char *tmp;
 136         static int onlyonce = 0;
 137
 138         tmp = &errbuf[pos];
 139         if (bg)
 140                 pos = snprintf(tmp, (erreob - tmp),
 141                         "mount to NFS server '%s' failed: ", server);
 142         else
 143                 pos = snprintf(tmp, (erreob - tmp),
 144                         "mount: mount to NFS server '%s' failed: ", server);
 145
 146         tmp = &errbuf[pos];
 147         if (rpc_createerr.cf_stat == RPC_TIMEDOUT) {
 148                 pos = snprintf(tmp, (erreob - tmp), "timed out %s",
 149                         will_retry ? "(retrying)" : "(giving up)");
 150         } else {
 151                 pos += rpc_strerror(pos);
 152                 tmp = &errbuf[pos];
 153                 if (bg) {
 154                         pos = snprintf(tmp, (erreob - tmp), " %s",
 155                                 will_retry ? "(retrying)" : "(giving up)");
 156                 }
 157         }
 158         if (bg) {
 159                 if (onlyonce++ < 1)
 160                         openlog("mount", LOG_CONS|LOG_PID, LOG_AUTH);
 161                 syslog(LOG_ERR, "%s.", errbuf);
 162         } else
 163                 fprintf(stderr, "%s.\n", errbuf);
 164 }
 165
 166 /* Define the order in which to probe for UDP/TCP services */
 167 enum plist {
 168         use_tcp = 0,
 169         udp_tcp,
 170         udp_only,
 171 };
 172 static const u_int *
 173 proto_probelist(enum plist list)
 174 {
 175         static const u_int probe_udp_tcp[] = { IPPROTO_UDP, IPPROTO_TCP, 0 };
 176         static const u_int probe_both[] = { IPPROTO_TCP, IPPROTO_UDP, 0 };
 177         static const u_int probe_udponly[] = { IPPROTO_UDP, 0 };
 178
 179         if (list == use_tcp)
 180                 return probe_both;
 181         if (list == udp_tcp)
 182                 return probe_udp_tcp;
 183         return probe_udponly;
 184 }
 185
 186 /* Define the order in which NFS versions are probed on portmapper */
 187 static const u_long *
 188 nfs_probelist(const int vers)
 189 {
 190         static const u_long nfs2_probe[] = { 2, 0};
 191         static const u_long nfs3_probe[] = { 3, 2, 0};
 192         switch (vers) {
 193         case 3:
 194                 return nfs3_probe;
 195         default:
 196                 return nfs2_probe;
 197         }
 198 }
 199
 200 /* Define the order in which Mountd versions are probed on portmapper */
 201 static const u_long *
 202 mnt_probelist(const int vers)
 203 {
 204         static const u_long mnt1_probe[] = { 1, 2, 0 };
 205         static const u_long mnt3_probe[] = { 3, 1, 2, 0 };
 206         switch (vers) {
 207         case 3:
 208                 return mnt3_probe;
 209         default:
 210                 return mnt1_probe;
 211         }
 212 }
 213
 214 static int
 215 linux_version_code(void) {
 216         struct utsname my_utsname;
 217         int p, q, r;
 218
 219         if (uname(&my_utsname) == 0) {
 220                 p = atoi(strtok(my_utsname.release, "."));
 221                 q = atoi(strtok(NULL, "."));
 222                 r = atoi(strtok(NULL, "."));
 223                 return MAKE_VERSION(p,q,r);
 224         }
 225         return 0;
 226 }
 227
 228 /*
 229  * Unfortunately, the kernel prints annoying console messages
 230  * in case of an unexpected nfs mount version (instead of
 231  * just returning some error).  Therefore we'll have to try
 232  * and figure out what version the kernel expects.
 233  *
 234  * Variables:
 235  *      NFS_MOUNT_VERSION: these nfsmount sources at compile time
 236  *      nfs_mount_version: version this source and running kernel can handle
 237  */
 238 int nfs_mount_version = NFS_MOUNT_VERSION;
 239
 240 int
 241 find_kernel_nfs_mount_version(void) {
 242         static int kernel_version = -1;
 243         int mnt_version = NFS_MOUNT_VERSION;
 244
 245         if (kernel_version == -1)
 246                 kernel_version = linux_version_code();
 247
 248         if (kernel_version) {
 249              if (kernel_version < MAKE_VERSION(2,1,32))
 250                   mnt_version = 1;
 251              else if (kernel_version < MAKE_VERSION(2,2,18))
 252                   mnt_version = 3;
 253              else if (kernel_version < MAKE_VERSION(2,3,0))
 254                   mnt_version = 4; /* since 2.2.18pre9 */
 255              else if (kernel_version < MAKE_VERSION(2,3,99))
 256                   mnt_version = 3;
 257              else if (kernel_version < MAKE_VERSION(2,6,3))
 258                   mnt_version = 4;
 259              else
 260                   mnt_version = 6;
 261         }
 262         if (mnt_version > NFS_MOUNT_VERSION)
 263              mnt_version = NFS_MOUNT_VERSION;
 264         return mnt_version;
 265 }
 266
 267 int nfs_gethostbyname(const char *, struct sockaddr_in *);
 268 int nfs_gethostbyname(const char *hostname, struct sockaddr_in *saddr)
 269 {
 270         struct hostent *hp;
 271
 272         saddr->sin_family = AF_INET;
 273         if (!inet_aton(hostname, &saddr->sin_addr)) {
 274                 if ((hp = gethostbyname(hostname)) == NULL) {
 275                         fprintf(stderr, _("mount: can't get address for %s\n"),
 276                                 hostname);
 277                         return 0;
 278                 } else {
 279                         if (hp->h_length > sizeof(*saddr)) {
 280                                 fprintf(stderr,
 281                                         _("mount: got bad hp->h_length\n"));
 282                                 hp->h_length = sizeof(*saddr);
 283                         }
 284                         memcpy(&saddr->sin_addr, hp->h_addr, hp->h_length);
 285                 }
 286         }
 287         return 1;
 288 }
 289
 290 /*
 291  * getport() is very similar to pmap_getport() with
 292  * the exception this version uses a non-reserve ports
 293  * instead of reserve ports since reserve ports
 294  * are not needed for pmap requests.
 295  */
 296 static u_short
 297 getport(
 298         struct sockaddr_in *saddr,
 299         u_long prog,
 300         u_long vers,
 301         u_int prot)
 302 {
 303         u_short port;
 304         int    socket;
 305         CLIENT *clnt = NULL;
 306         struct pmap parms;
 307         enum clnt_stat stat;
 308
 309         saddr->sin_port = htons (PMAPPORT);
 310         socket = get_socket(saddr, prot, FALSE, FALSE);
 311
 312         switch (prot) {
 313         case IPPROTO_UDP:
 314                 clnt = clntudp_bufcreate(saddr,
 315                                          PMAPPROG, PMAPVERS, TIMEOUT, &socket,
 316                                          UDPMSGSIZE, UDPMSGSIZE);
 317                 break;
 318         case IPPROTO_TCP:
 319                 clnt = clnttcp_create(saddr,
 320                         PMAPPROG, PMAPVERS, &socket, 50, 500);
 321                 break;
 322         }
 323         if (clnt != NULL) {
 324                 parms.pm_prog = prog;
 325                 parms.pm_vers = vers;
 326                 parms.pm_prot = prot;
 327                 parms.pm_port = 0;    /* not needed or used */
 328
 329                 stat = clnt_call(clnt, PMAPPROC_GETPORT, (xdrproc_t)xdr_pmap,
 330                         (caddr_t)&parms, (xdrproc_t)xdr_u_short, (caddr_t)&port, TIMEOUT);
 331                 if (stat) {
 332                         clnt_geterr(clnt, &rpc_createerr.cf_error);
 333                         rpc_createerr.cf_stat = stat;
 334                 }
 335                 clnt_destroy(clnt);
 336                 if (stat != RPC_SUCCESS)
 337                         port = 0;
 338                 else if (port == 0)
 339                         rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
 340         }
 341         if (socket != 1)
 342                 close(socket);
 343
 344         return port;
 345 }
 346
 347 /*
 348  * Use the portmapper to discover whether or not the service we want is
 349  * available. The lists 'versions' and 'protos' define ordered sequences
 350  * of service versions and udp/tcp protocols to probe for.
 351  */
 352 static int
 353 probe_port(clnt_addr_t *server,
 354            const u_long *versions,
 355            const u_int *protos)
 356 {
 357         struct sockaddr_in *saddr = &server->saddr;
 358         struct pmap *pmap = &server->pmap;
 359         const u_long prog = pmap->pm_prog, *p_vers;
 360         const u_int prot = (u_int)pmap->pm_prot,
 361                 *p_prot;
 362         const u_short port = (u_short) pmap->pm_port;
 363         u_long vers = pmap->pm_vers;
 364         u_short p_port;
 365         p_prot = prot ? &prot : protos;
 366         p_vers = vers ? &vers : versions;
 367         rpc_createerr.cf_stat = 0;
 368         for (;;) {
 369                 saddr->sin_port = htons(PMAPPORT);
 370                 p_port = getport(saddr, prog, *p_vers, *p_prot);
 371                 if (p_port) {
 372                         if (!port || port == p_port) {
 373                                 saddr->sin_port = htons(p_port);
 374                                 if (verbose) {
 375                                         fprintf(stderr,
 376                                                 "mount: trying %s prog %ld vers %ld prot %s port %d\n",
 377                                                 inet_ntoa(saddr->sin_addr), prog, *p_vers,
 378                                                 *p_prot == IPPROTO_UDP ? "udp" : "tcp", p_port);
 379                                 }
 380                                 if (clnt_ping(saddr, prog, *p_vers, *p_prot, NULL))
 381                                         goto out_ok;
 382                                 if (rpc_createerr.cf_stat == RPC_TIMEDOUT)
 383                                         goto out_bad;
 384                         }
 385                 }
 386                 if (rpc_createerr.cf_stat != RPC_PROGNOTREGISTERED)
 387                         goto out_bad;
 388
 389                 if (!prot) {
 390                         if (*++p_prot)
 391                                 continue;
 392                         p_prot = protos;
 393                 }
 394                 if (vers == pmap->pm_vers) {
 395                         p_vers = versions;
 396                         vers = 0;
 397                 }
 398                 if (vers || !*++p_vers)
 399                         break;
 400         }
 401 out_bad:
 402         return 0;
 403
 404  out_ok:
 405         if (!vers)
 406                 pmap->pm_vers = *p_vers;
 407         if (!prot)
 408                 pmap->pm_prot = *p_prot;
 409         if (!port)
 410                 pmap->pm_port = p_port;
 411         rpc_createerr.cf_stat = 0;
 412         return 1;
 413 }
 414
 415 static int
 416 probe_nfsport(clnt_addr_t *nfs_server)
 417 {
 418         const struct pmap *pmap = &nfs_server->pmap;
 419         const u_long *probe_vers;
 420         const u_int *probe_prot;
 421
 422         if (pmap->pm_vers && pmap->pm_prot && pmap->pm_port)
 423                 return 1;
 424         probe_vers = nfs_probelist(MAX_NFSPROT);
 425         probe_prot = proto_probelist(HAVE_RELIABLE_TCP ? use_tcp : udp_only);
 426         return probe_port(nfs_server, probe_vers, probe_prot);
 427 }
 428
 429 int probe_mntport(clnt_addr_t *mnt_server)
 430 {
 431         const struct pmap *pmap = &mnt_server->pmap;
 432         const u_long *probe_vers;
 433         const u_int *probe_prot;
 434
 435         if (pmap->pm_vers && pmap->pm_prot && pmap->pm_port)
 436                 return 1;
 437         probe_vers = mnt_probelist(MAX_MNTPROT);
 438         probe_prot = proto_probelist(HAVE_RELIABLE_TCP ? udp_tcp : udp_only);
 439         return probe_port(mnt_server, probe_vers, probe_prot);
 440 }
 441
 442 static int
 443 probe_bothports(clnt_addr_t *mnt_server, clnt_addr_t *nfs_server)
 444 {
 445         struct pmap *nfs_pmap = &nfs_server->pmap;
 446         struct pmap *mnt_pmap = &mnt_server->pmap;
 447         struct pmap save_nfs, save_mnt;
 448         int res;
 449         const u_long *probe_vers;
 450
 451         if (mnt_pmap->pm_vers && !nfs_pmap->pm_vers)
 452                 nfs_pmap->pm_vers = mntvers_to_nfs(mnt_pmap->pm_vers);
 453         else if (nfs_pmap->pm_vers && !mnt_pmap->pm_vers)
 454                 mnt_pmap->pm_vers = nfsvers_to_mnt(nfs_pmap->pm_vers);
 455         if (nfs_pmap->pm_vers)
 456                 goto version_fixed;
 457         memcpy(&save_nfs, nfs_pmap, sizeof(save_nfs));
 458         memcpy(&save_mnt, mnt_pmap, sizeof(save_mnt));
 459         for (probe_vers = mnt_probelist(MAX_MNTPROT); *probe_vers; probe_vers++) {
 460                 nfs_pmap->pm_vers = mntvers_to_nfs(*probe_vers);
 461                 if ((res = probe_nfsport(nfs_server) != 0)) {
 462                         mnt_pmap->pm_vers = nfsvers_to_mnt(nfs_pmap->pm_vers);
 463                         if ((res = probe_mntport(mnt_server)) != 0)
 464                                 return 1;
 465                         memcpy(mnt_pmap, &save_mnt, sizeof(*mnt_pmap));
 466                 }
 467                 switch (rpc_createerr.cf_stat) {
 468                 case RPC_PROGVERSMISMATCH:
 469                 case RPC_PROGNOTREGISTERED:
 470                         break;
 471                 default:
 472                         goto out_bad;
 473                 }
 474                 memcpy(nfs_pmap, &save_nfs, sizeof(*nfs_pmap));
 475         }
 476  out_bad:
 477         return 0;
 478  version_fixed:
 479         if (!probe_nfsport(nfs_server))
 480                 goto out_bad;
 481         return probe_mntport(mnt_server);
 482 }
 483
 484 static inline enum clnt_stat
 485 nfs3_mount(CLIENT *clnt, mnt3arg_t *mnt3arg, mnt3res_t *mnt3res)
 486 {
 487         return clnt_call(clnt, MOUNTPROC3_MNT,
 488                          (xdrproc_t) xdr_dirpath, (caddr_t) mnt3arg,
 489                          (xdrproc_t) xdr_mountres3, (caddr_t) mnt3res,
 490                          TIMEOUT);
 491 }
 492
 493 static inline enum clnt_stat
 494 nfs2_mount(CLIENT *clnt, mnt2arg_t *mnt2arg, mnt2res_t *mnt2res)
 495 {
 496         return clnt_call(clnt, MOUNTPROC_MNT,
 497                          (xdrproc_t) xdr_dirpath, (caddr_t) mnt2arg,
 498                          (xdrproc_t) xdr_fhstatus, (caddr_t) mnt2res,
 499                          TIMEOUT);
 500 }
 501
 502 static int
 503 nfs_call_mount(clnt_addr_t *mnt_server, clnt_addr_t *nfs_server,
 504                mntarg_t *mntarg, mntres_t *mntres)
 505 {
 506         CLIENT *clnt;
 507         enum clnt_stat stat;
 508         int msock;
 509
 510         if (!probe_bothports(mnt_server, nfs_server))
 511                 goto out_bad;
 512
 513         clnt = mnt_openclnt(mnt_server, &msock);
 514         if (!clnt)
 515                 goto out_bad;
 516         /* make pointers in xdr_mountres3 NULL so
 517          * that xdr_array allocates memory for us
 518          */
 519         memset(mntres, 0, sizeof(*mntres));
 520         switch (mnt_server->pmap.pm_vers) {
 521         case 3:
 522                 stat = nfs3_mount(clnt, mntarg, &mntres->nfsv3);
 523                 break;
 524         case 2:
 525         case 1:
 526                 stat = nfs2_mount(clnt, mntarg, &mntres->nfsv2);
 527                 break;
 528         default:
 529                 goto out_bad;
 530         }
 531         if (stat != RPC_SUCCESS) {
 532                 clnt_geterr(clnt, &rpc_createerr.cf_error);
 533                 rpc_createerr.cf_stat = stat;
 534         }
 535         mnt_closeclnt(clnt, msock);
 536         if (stat == RPC_SUCCESS)
 537                 return 1;
 538  out_bad:
 539         return 0;
 540 }
 541
 542 static int
 543 parse_options(char *old_opts, struct nfs_mount_data *data,
 544               int *bg, int *retry, clnt_addr_t *mnt_server,
 545               clnt_addr_t *nfs_server, char *new_opts, const int opt_size)
 546 {
 547         struct sockaddr_in *mnt_saddr = &mnt_server->saddr;
 548         struct pmap *mnt_pmap = &mnt_server->pmap;
 549         struct pmap *nfs_pmap = &nfs_server->pmap;
 550         int len;
 551         char *opt, *opteq;
 552         char *mounthost = NULL;
 553         char cbuf[128];
 554
 555         data->flags = 0;
 556         *bg = 0;
 557
 558         len = strlen(new_opts);
 559         for (opt = strtok(old_opts, ","); opt; opt = strtok(NULL, ",")) {
 560                 if (strlen(opt) >= sizeof(cbuf))
 561                         goto bad_parameter;
 562                 if ((opteq = strchr(opt, '=')) && isdigit(opteq[1])) {
 563                         int val = atoi(opteq + 1);
 564                         *opteq = '\0';
 565 /* printf("opt=%s\n", opt); */
 566                         if (!strcmp(opt, "rsize"))
 567                                 data->rsize = val;
 568                         else if (!strcmp(opt, "wsize"))
 569                                 data->wsize = val;
 570                         else if (!strcmp(opt, "timeo"))
 571                                 data->timeo = val;
 572                         else if (!strcmp(opt, "retrans"))
 573                                 data->retrans = val;
 574                         else if (!strcmp(opt, "acregmin"))
 575                                 data->acregmin = val;
 576                         else if (!strcmp(opt, "acregmax"))
 577                                 data->acregmax = val;
 578                         else if (!strcmp(opt, "acdirmin"))
 579                                 data->acdirmin = val;
 580                         else if (!strcmp(opt, "acdirmax"))
 581                                 data->acdirmax = val;
 582                         else if (!strcmp(opt, "actimeo")) {
 583                                 data->acregmin = val;
 584                                 data->acregmax = val;
 585                                 data->acdirmin = val;
 586                                 data->acdirmax = val;
 587                         }
 588                         else if (!strcmp(opt, "retry"))
 589                                 *retry = val;
 590                         else if (!strcmp(opt, "port"))
 591                                 nfs_pmap->pm_port = val;
 592                         else if (!strcmp(opt, "mountport"))
 593                                 mnt_pmap->pm_port = val;
 594                         else if (!strcmp(opt, "mountprog"))
 595                                 mnt_pmap->pm_prog = val;
 596                         else if (!strcmp(opt, "mountvers"))
 597                                 mnt_pmap->pm_vers = val;
 598                         else if (!strcmp(opt, "mounthost"))
 599                                 mounthost=xstrndup(opteq+1, strcspn(opteq+1," \t\n\r,"));
 600                         else if (!strcmp(opt, "nfsprog"))
 601                                 nfs_pmap->pm_prog = val;
 602                         else if (!strcmp(opt, "nfsvers") ||
 603                                  !strcmp(opt, "vers")) {
 604                                 nfs_pmap->pm_vers = val;
 605                                 opt = "nfsvers";
 606 #if NFS_MOUNT_VERSION >= 2
 607                         } else if (!strcmp(opt, "namlen")) {
 608                                 if (nfs_mount_version >= 2)
 609                                         data->namlen = val;
 610                                 else if (sloppy)
 611                                         continue;
 612                                 else
 613                                         goto bad_parameter;
 614 #endif
 615                         } else if (!strcmp(opt, "addr")) {
 616                                 /* ignore */;
 617                                 continue;
 618                         } else if (sloppy)
 619                                 continue;
 620                         else
 621                                 goto bad_parameter;
 622                         sprintf(cbuf, "%s=%s,", opt, opteq+1);
 623                 } else if (opteq) {
 624                         *opteq = '\0';
 625                         if (!strcmp(opt, "proto")) {
 626                                 if (!strcmp(opteq+1, "udp")) {
 627                                         nfs_pmap->pm_prot = IPPROTO_UDP;
 628                                         mnt_pmap->pm_prot = IPPROTO_UDP;
 629 #if NFS_MOUNT_VERSION >= 2
 630                                         data->flags &= ~NFS_MOUNT_TCP;
 631                                 } else if (!strcmp(opteq+1, "tcp") &&
 632                                            nfs_mount_version > 2) {
 633                                         nfs_pmap->pm_prot = IPPROTO_TCP;
 634                                         mnt_pmap->pm_prot = IPPROTO_TCP;
 635                                         data->flags |= NFS_MOUNT_TCP;
 636 #endif
 637                                 } else if (sloppy)
 638                                         continue;
 639                                 else
 640                                         goto bad_parameter;
 641 #if NFS_MOUNT_VERSION >= 5
 642                         } else if (!strcmp(opt, "sec")) {
 643                                 char *secflavor = opteq+1;
 644                                 /* see RFC 2623 */
 645                                 if (nfs_mount_version < 5) {
 646                                         printf(_("Warning: ignoring sec=%s option\n"), secflavor);
 647                                         continue;
 648                                 } else if (!strcmp(secflavor, "none"))
 649                                         data->pseudoflavor = AUTH_NONE;
 650                                 else if (!strcmp(secflavor, "sys"))
 651                                         data->pseudoflavor = AUTH_SYS;
 652                                 else if (!strcmp(secflavor, "krb5"))
 653                                         data->pseudoflavor = AUTH_GSS_KRB5;
 654                                 else if (!strcmp(secflavor, "krb5i"))
 655                                         data->pseudoflavor = AUTH_GSS_KRB5I;
 656                                 else if (!strcmp(secflavor, "krb5p"))
 657                                         data->pseudoflavor = AUTH_GSS_KRB5P;
 658                                 else if (!strcmp(secflavor, "lipkey"))
 659                                         data->pseudoflavor = AUTH_GSS_LKEY;
 660                                 else if (!strcmp(secflavor, "lipkey-i"))
 661                                         data->pseudoflavor = AUTH_GSS_LKEYI;
 662                                 else if (!strcmp(secflavor, "lipkey-p"))
 663                                         data->pseudoflavor = AUTH_GSS_LKEYP;
 664                                 else if (!strcmp(secflavor, "spkm3"))
 665                                         data->pseudoflavor = AUTH_GSS_SPKM;
 666                                 else if (!strcmp(secflavor, "spkm3i"))
 667                                         data->pseudoflavor = AUTH_GSS_SPKMI;
 668                                 else if (!strcmp(secflavor, "spkm3p"))
 669                                         data->pseudoflavor = AUTH_GSS_SPKMP;
 670                                 else if (sloppy)
 671                                         continue;
 672                                 else {
 673                                         printf(_("Warning: Unrecognized security flavor %s.\n"),
 674                                                 secflavor);
 675                                         goto bad_parameter;
 676                                 }
 677                                 data->flags |= NFS_MOUNT_SECFLAVOUR;
 678 #endif
 679                         } else if (!strcmp(opt, "mounthost"))
 680                                 mounthost=xstrndup(opteq+1,
 681                                                    strcspn(opteq+1," \t\n\r,"));
 682                          else if (!strcmp(opt, "context")) {
 683                                 char *context = opteq + 1;
 684
 685                                 if (strlen(context) > NFS_MAX_CONTEXT_LEN) {
 686                                         printf(_("context parameter exceeds limit of %d\n"),
 687                                                  NFS_MAX_CONTEXT_LEN);
 688                                         goto bad_parameter;
 689                                 }
 690                                 strncpy(data->context, context, NFS_MAX_CONTEXT_LEN);
 691                         } else if (sloppy)
 692                                 continue;
 693                         else
 694                                 goto bad_parameter;
 695                         sprintf(cbuf, "%s=%s,", opt, opteq+1);
 696                 } else {
 697                         int val = 1;
 698                         if (!strncmp(opt, "no", 2)) {
 699                                 val = 0;
 700                                 opt += 2;
 701                         }
 702                         if (!strcmp(opt, "bg"))
 703                                 *bg = val;
 704                         else if (!strcmp(opt, "fg"))
 705                                 *bg = !val;
 706                         else if (!strcmp(opt, "soft")) {
 707                                 data->flags &= ~NFS_MOUNT_SOFT;
 708                                 if (val)
 709                                         data->flags |= NFS_MOUNT_SOFT;
 710                         } else if (!strcmp(opt, "hard")) {
 711                                 data->flags &= ~NFS_MOUNT_SOFT;
 712                                 if (!val)
 713                                         data->flags |= NFS_MOUNT_SOFT;
 714                         } else if (!strcmp(opt, "intr")) {
 715                                 data->flags &= ~NFS_MOUNT_INTR;
 716                                 if (val)
 717                                         data->flags |= NFS_MOUNT_INTR;
 718                         } else if (!strcmp(opt, "posix")) {
 719                                 data->flags &= ~NFS_MOUNT_POSIX;
 720                                 if (val)
 721                                         data->flags |= NFS_MOUNT_POSIX;
 722                         } else if (!strcmp(opt, "cto")) {
 723                                 data->flags &= ~NFS_MOUNT_NOCTO;
 724                                 if (!val)
 725                                         data->flags |= NFS_MOUNT_NOCTO;
 726                         } else if (!strcmp(opt, "ac")) {
 727                                 data->flags &= ~NFS_MOUNT_NOAC;
 728                                 if (!val)
 729                                         data->flags |= NFS_MOUNT_NOAC;
 730 #if NFS_MOUNT_VERSION >= 2
 731                         } else if (!strcmp(opt, "tcp")) {
 732                                 data->flags &= ~NFS_MOUNT_TCP;
 733                                 if (val) {
 734                                         if (nfs_mount_version < 2)
 735                                                 goto bad_option;
 736                                         nfs_pmap->pm_prot = IPPROTO_TCP;
 737                                         mnt_pmap->pm_prot = IPPROTO_TCP;
 738                                         data->flags |= NFS_MOUNT_TCP;
 739                                 } else {
 740                                         mnt_pmap->pm_prot = IPPROTO_UDP;
 741                                         nfs_pmap->pm_prot = IPPROTO_UDP;
 742                                 }
 743                         } else if (!strcmp(opt, "udp")) {
 744                                 data->flags &= ~NFS_MOUNT_TCP;
 745                                 if (!val) {
 746                                         if (nfs_mount_version < 2)
 747                                                 goto bad_option;
 748                                         nfs_pmap->pm_prot = IPPROTO_TCP;
 749                                         mnt_pmap->pm_prot = IPPROTO_TCP;
 750                                         data->flags |= NFS_MOUNT_TCP;
 751                                 } else {
 752                                         nfs_pmap->pm_prot = IPPROTO_UDP;
 753                                         mnt_pmap->pm_prot = IPPROTO_UDP;
 754                                 }
 755 #endif
 756 #if NFS_MOUNT_VERSION >= 3
 757                         } else if (!strcmp(opt, "lock")) {
 758                                 data->flags &= ~NFS_MOUNT_NONLM;
 759                                 if (!val) {
 760                                         if (nfs_mount_version < 3)
 761                                                 goto bad_option;
 762                                         data->flags |= NFS_MOUNT_NONLM;
 763                                 }
 764 #endif
 765 #if NFS_MOUNT_VERSION >= 4
 766                         } else if (!strcmp(opt, "broken_suid")) {
 767                                 data->flags &= ~NFS_MOUNT_BROKEN_SUID;
 768                                 if (val) {
 769                                         if (nfs_mount_version < 4)
 770                                                 goto bad_option;
 771                                         data->flags |= NFS_MOUNT_BROKEN_SUID;
 772                                 }
 773                         } else if (!strcmp(opt, "acl")) {
 774                                 data->flags &= ~NFS_MOUNT_NOACL;
 775                                 if (!val)
 776                                         data->flags |= NFS_MOUNT_NOACL;
 777 #endif
 778                         } else {
 779                         bad_option:
 780                                 if (sloppy)
 781                                         continue;
 782                                 printf(_("Unsupported nfs mount option: "
 783                                          "%s%s\n"), val ? "" : "no", opt);
 784                                 goto out_bad;
 785                         }
 786                         sprintf(cbuf, val ? "%s,":"no%s,", opt);
 787                 }
 788                 len += strlen(cbuf);
 789                 if (len >= opt_size) {
 790                         printf(_("mount: excessively long option argument\n"));
 791                         goto out_bad;
 792                 }
 793                 strcat(new_opts, cbuf);
 794         }
 795         /* See if the nfs host = mount host. */
 796         if (mounthost) {
 797                 if (!nfs_gethostbyname(mounthost, mnt_saddr))
 798                         goto out_bad;
 799                 *mnt_server->hostname = mounthost;
 800         }
 801         return 1;
 802  bad_parameter:
 803         printf(_("Bad nfs mount parameter: %s\n"), opt);
 804  out_bad:
 805         return 0;
 806 }
 807
 808 static inline int
 809 nfsmnt_check_compat(const struct pmap *nfs_pmap, const struct pmap *mnt_pmap)
 810 {
 811         if (nfs_pmap->pm_vers &&
 812                 (nfs_pmap->pm_vers > MAX_NFSPROT || nfs_pmap->pm_vers < 2)) {
 813                 if (nfs_pmap->pm_vers == 4)
 814                         fprintf(stderr, _("'vers=4' is not supported.  "
 815                                 "Use '-t nfs4' instead.\n"));
 816                 else
 817                         fprintf(stderr, _("NFS version %ld is not supported.\n"),
 818                                 nfs_pmap->pm_vers);
 819                 goto out_bad;
 820         }
 821         if (mnt_pmap->pm_vers > MAX_MNTPROT) {
 822                 fprintf(stderr, _("NFS mount version %ld s not supported.\n"),
 823                         mnt_pmap->pm_vers);
 824                 goto out_bad;
 825         }
 826         return 1;
 827  out_bad:
 828         return 0;
 829 }
 830
 831 int
 832 nfsmount(const char *spec, const char *node, int *flags,
 833          char **extra_opts, char **mount_opts, int *nfs_mount_vers,
 834          int running_bg, int *need_statd)
 835 {
 836         static char *prev_bg_host;
 837         char hostdir[1024];
 838         char *hostname, *dirname, *old_opts, *mounthost = NULL;
 839         char new_opts[1024], cbuf[1024];
 840         static struct nfs_mount_data data;
 841         int val;
 842         static int doonce = 0;
 843
 844         clnt_addr_t mnt_server = { &mounthost, };
 845         clnt_addr_t nfs_server = { &hostname, };
 846         struct sockaddr_in *nfs_saddr = &nfs_server.saddr;
 847         struct pmap  *mnt_pmap = &mnt_server.pmap,
 848                      *nfs_pmap = &nfs_server.pmap;
 849         struct pmap  save_mnt, save_nfs;
 850
 851         int fsock = -1;
 852
 853         mntres_t mntres;
 854
 855         struct stat statbuf;
 856         char *s;
 857         int bg, retry;
 858         int retval = EX_FAIL;
 859         time_t t;
 860         time_t prevt;
 861         time_t timeout;
 862
 863         /* The version to try is either specified or 0
 864            In case it is 0 we tell the caller what we tried */
 865         if (!*nfs_mount_vers)
 866                 *nfs_mount_vers = find_kernel_nfs_mount_version();
 867         nfs_mount_version = *nfs_mount_vers;
 868
 869         if (strlen(spec) >= sizeof(hostdir)) {
 870                 fprintf(stderr, _("mount: "
 871                                   "excessively long host:dir argument\n"));
 872                 goto fail;
 873         }
 874         strcpy(hostdir, spec);
 875         if ((s = strchr(hostdir, ':'))) {
 876                 hostname = hostdir;
 877                 dirname = s + 1;
 878                 *s = '\0';
 879                 /* Ignore all but first hostname in replicated mounts
 880                    until they can be fully supported. (mack@sgi.com) */
 881                 if ((s = strchr(hostdir, ','))) {
 882                         *s = '\0';
 883                         fprintf(stderr,
 884                                 _("mount: warning: "
 885                                   "multiple hostnames not supported\n"));
 886                 }
 887         } else {
 888                 fprintf(stderr,
 889                         _("mount: "
 890                           "directory to mount not in host:dir format\n"));
 891                 goto fail;
 892         }
 893
 894         if (!nfs_gethostbyname(hostname, nfs_saddr))
 895                 goto fail;
 896         mounthost = hostname;
 897         memcpy (&mnt_server.saddr, nfs_saddr, sizeof (mnt_server.saddr));
 898
 899         /* add IP address to mtab options for use when unmounting */
 900
 901         s = inet_ntoa(nfs_saddr->sin_addr);
 902         old_opts = *extra_opts;
 903         if (!old_opts)
 904                 old_opts = "";
 905
 906         /* Set default options.
 907          * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to
 908          * let the kernel decide.
 909          * timeo is filled in after we know whether it'll be TCP or UDP. */
 910         memset(&data, 0, sizeof(data));
 911         data.acregmin   = 3;
 912         data.acregmax   = 60;
 913         data.acdirmin   = 30;
 914         data.acdirmax   = 60;
 915 #if NFS_MOUNT_VERSION >= 2
 916         data.namlen     = NAME_MAX;
 917 #endif
 918
 919         bg = 0;
 920         retry = 10000;          /* 10000 minutes ~ 1 week */
 921
 922         memset(mnt_pmap, 0, sizeof(*mnt_pmap));
 923         mnt_pmap->pm_prog = MOUNTPROG;
 924         memset(nfs_pmap, 0, sizeof(*nfs_pmap));
 925         nfs_pmap->pm_prog = NFS_PROGRAM;
 926
 927         /* parse options */
 928         new_opts[0] = 0;
 929         if (!parse_options(old_opts, &data, &bg, &retry, &mnt_server, &nfs_server,
 930                            new_opts, sizeof(new_opts)))
 931                 goto fail;
 932         if (!nfsmnt_check_compat(nfs_pmap, mnt_pmap))
 933                 goto fail;
 934
 935         if (retry == 10000 && !bg)
 936                 retry = 2; /* reset for fg mounts */
 937
 938
 939 #ifdef NFS_MOUNT_DEBUG
 940         printf("rsize = %d, wsize = %d, timeo = %d, retrans = %d\n",
 941                data.rsize, data.wsize, data.timeo, data.retrans);
 942         printf("acreg (min, max) = (%d, %d), acdir (min, max) = (%d, %d)\n",
 943                data.acregmin, data.acregmax, data.acdirmin, data.acdirmax);
 944         printf("port = %d, bg = %d, retry = %d, flags = %.8x\n",
 945                nfs_pmap->pm_port, bg, retry, data.flags);
 946         printf("mountprog = %d, mountvers = %d, nfsprog = %d, nfsvers = %d\n",
 947                mnt_pmap->pm_prog, mnt_pmap->pm_vers,
 948                nfs_pmap->pm_prog, nfs_pmap->pm_vers);
 949         printf("soft = %d, intr = %d, posix = %d, nocto = %d, noac = %d ",
 950                (data.flags & NFS_MOUNT_SOFT) != 0,
 951                (data.flags & NFS_MOUNT_INTR) != 0,
 952                (data.flags & NFS_MOUNT_POSIX) != 0,
 953                (data.flags & NFS_MOUNT_NOCTO) != 0,
 954                (data.flags & NFS_MOUNT_NOAC) != 0);
 955 #if NFS_MOUNT_VERSION >= 2
 956         printf("tcp = %d ",
 957                (data.flags & NFS_MOUNT_TCP) != 0);
 958 #endif
 959 #if NFS_MOUNT_VERSION >= 4
 960         printf("noacl = %d ", (data.flags & NFS_MOUNT_NOACL) != 0);
 961 #endif
 962 #if NFS_MOUNT_VERSION >= 5
 963         printf("sec = %u ", data.pseudoflavor);
 964 #endif
 965         printf("\n");
 966 #endif
 967
 968         data.version = nfs_mount_version;
 969         *mount_opts = (char *) &data;
 970
 971         if (*flags & MS_REMOUNT)
 972                 goto out_ok;
 973
 974         /*
 975          * If the previous mount operation on the same host was
 976          * backgrounded, and the "bg" for this mount is also set,
 977          * give up immediately, to avoid the initial timeout.
 978          */
 979         if (bg && !running_bg &&
 980             prev_bg_host && strcmp(hostname, prev_bg_host) == 0) {
 981                 if (retry > 0)
 982                         retval = EX_BG;
 983                 return retval;
 984         }
 985
 986         /* create mount deamon client */
 987
 988         /*
 989          * The following loop implements the mount retries. On the first
 990          * call, "running_bg" is 0. When the mount times out, and the
 991          * "bg" option is set, the exit status EX_BG will be returned.
 992          * For a backgrounded mount, there will be a second call by the
 993          * child process with "running_bg" set to 1.
 994          *
 995          * The case where the mount point is not present and the "bg"
 996          * option is set, is treated as a timeout. This is done to
 997          * support nested mounts.
 998          *
 999          * The "retry" count specified by the user is the number of
1000          * minutes to retry before giving up.
1001          *
1002          * Only the first error message will be displayed.
1003          */
1004         timeout = time(NULL) + 60 * retry;
1005         prevt = 0;
1006         t = 30;
1007         val = 1;
1008
1009         memcpy(&save_nfs, nfs_pmap, sizeof(save_nfs));
1010         memcpy(&save_mnt, mnt_pmap, sizeof(save_mnt));
1011         for (;;) {
1012                 if (bg && stat(node, &statbuf) == -1) {
1013                         /* no mount point yet - sleep */
1014                         if (running_bg) {
1015                                 sleep(val);     /* 1, 2, 4, 8, 16, 30, ... */
1016                                 val *= 2;
1017                                 if (val > 30)
1018                                         val = 30;
1019                         }
1020                 } else {
1021                         int stat;
1022                         /* be careful not to use too many CPU cycles */
1023                         if (t - prevt < 30)
1024                                 sleep(30);
1025
1026                         stat = nfs_call_mount(&mnt_server, &nfs_server,
1027                                               &dirname, &mntres);
1028                         if (stat)
1029                                 break;
1030                         memcpy(nfs_pmap, &save_nfs, sizeof(*nfs_pmap));
1031                         memcpy(mnt_pmap, &save_mnt, sizeof(*mnt_pmap));
1032                         prevt = t;
1033                 }
1034                 if (!bg) {
1035                         switch(rpc_createerr.cf_stat){
1036                         case RPC_TIMEDOUT:
1037                                 break;
1038                         case RPC_SYSTEMERROR:
1039                                 if (errno == ETIMEDOUT)
1040                                         break;
1041                         default:
1042                                 mount_errors(*nfs_server.hostname, 0, bg);
1043                         goto fail;
1044                         }
1045                         t = time(NULL);
1046                         if (t >= timeout) {
1047                                 mount_errors(*nfs_server.hostname, 0, bg);
1048                                 goto fail;
1049                         }
1050                         mount_errors(*nfs_server.hostname, 1, bg);
1051                         continue;
1052                 }
1053                 if (!running_bg) {
1054                         prev_bg_host = xstrdup(hostname);
1055                         if (retry > 0)
1056                                 retval = EX_BG;
1057                         goto fail;
1058                 }
1059                 t = time(NULL);
1060                 if (t >= timeout) {
1061                         mount_errors(*nfs_server.hostname, 0, bg);
1062                         goto fail;
1063                 }
1064                 if (doonce++ < 1)
1065                         mount_errors(*nfs_server.hostname, 1, bg);
1066         }
1067
1068         if (nfs_pmap->pm_vers == 2) {
1069                 if (mntres.nfsv2.fhs_status != 0) {
1070                         fprintf(stderr,
1071                                 _("mount: %s:%s failed, reason given by server: %s\n"),
1072                                 hostname, dirname,
1073                                 nfs_strerror(mntres.nfsv2.fhs_status));
1074                         goto fail;
1075                 }
1076                 memcpy(data.root.data,
1077                        (char *) mntres.nfsv2.fhstatus_u.fhs_fhandle,
1078                        NFS_FHSIZE);
1079 #if NFS_MOUNT_VERSION >= 4
1080                 data.root.size = NFS_FHSIZE;
1081                 memcpy(data.old_root.data,
1082                        (char *) mntres.nfsv2.fhstatus_u.fhs_fhandle,
1083                        NFS_FHSIZE);
1084 #endif
1085         } else {
1086 #if NFS_MOUNT_VERSION >= 4
1087                 mountres3_ok *mountres;
1088                 fhandle3 *fhandle;
1089                 int i, *flavor, yum = 0;
1090                 if (mntres.nfsv3.fhs_status != 0) {
1091                         fprintf(stderr,
1092                                 _("mount: %s:%s failed, reason given by server: %s\n"),
1093                                 hostname, dirname,
1094                                 nfs_strerror(mntres.nfsv3.fhs_status));
1095                         goto fail;
1096                 }
1097 #if NFS_MOUNT_VERSION >= 5
1098                 mountres = &mntres.nfsv3.mountres3_u.mountinfo;
1099                 i = mountres->auth_flavors.auth_flavors_len;
1100                 if (i <= 0)
1101                         goto noauth_flavors;
1102
1103                 flavor = mountres->auth_flavors.auth_flavors_val;
1104                 while (--i >= 0) {
1105                         /* If no flavour requested, use first simple
1106                          * flavour that is offered.
1107                          */
1108                         if (! (data.flags & NFS_MOUNT_SECFLAVOUR) &&
1109                             (flavor[i] == AUTH_SYS ||
1110                              flavor[i] == AUTH_NONE)) {
1111                                 data.pseudoflavor = flavor[i];
1112                                 data.flags |= NFS_MOUNT_SECFLAVOUR;
1113                         }
1114                         if (flavor[i] == data.pseudoflavor)
1115                                 yum = 1;
1116 #ifdef NFS_MOUNT_DEBUG
1117                         printf("auth flavor %d: %d\n",
1118                                 i, flavor[i]);
1119 #endif
1120                 }
1121                 if (!yum) {
1122                         fprintf(stderr,
1123                                 "mount: %s:%s failed, "
1124                                 "security flavor not supported\n",
1125                                 hostname, dirname);
1126                         /* server has registered us in rmtab, send umount */
1127                         nfs_call_umount(&mnt_server, &dirname);
1128                         goto fail;
1129                 }
1130 noauth_flavors:
1131 #endif
1132                 fhandle = &mntres.nfsv3.mountres3_u.mountinfo.fhandle;
1133                 memset(data.old_root.data, 0, NFS_FHSIZE);
1134                 memset(&data.root, 0, sizeof(data.root));
1135                 data.root.size = fhandle->fhandle3_len;
1136                 memcpy(data.root.data,
1137                        (char *) fhandle->fhandle3_val,
1138                        fhandle->fhandle3_len);
1139
1140                 data.flags |= NFS_MOUNT_VER3;
1141 #endif
1142         }
1143
1144         if (nfs_mount_version == 1) {
1145                 /* create nfs socket for kernel */
1146                 if (nfs_pmap->pm_prot == IPPROTO_TCP)
1147                         fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
1148                 else
1149                         fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
1150                 if (fsock < 0) {
1151                         perror(_("nfs socket"));
1152                         goto fail;
1153                 }
1154                 if (bindresvport(fsock, 0) < 0) {
1155                         perror(_("nfs bindresvport"));
1156                         goto fail;
1157                 }
1158         }
1159
1160 #ifdef NFS_MOUNT_DEBUG
1161         printf(_("using port %d for nfs deamon\n"), nfs_pmap->pm_port);
1162 #endif
1163         nfs_saddr->sin_port = htons(nfs_pmap->pm_port);
1164         /*
1165          * connect() the socket for kernels 1.3.10 and below only,
1166          * to avoid problems with multihomed hosts.
1167          * --Swen
1168          */
1169         if (linux_version_code() <= 0x01030a && fsock != -1
1170             && connect(fsock, (struct sockaddr *) nfs_saddr,
1171                        sizeof (*nfs_saddr)) < 0) {
1172                 perror(_("nfs connect"));
1173                 goto fail;
1174         }
1175
1176 #if NFS_MOUNT_VERSION >= 2
1177         if (nfs_pmap->pm_prot == IPPROTO_TCP)
1178                 data.flags |= NFS_MOUNT_TCP;
1179         else
1180                 data.flags &= ~NFS_MOUNT_TCP;
1181 #endif
1182
1183         /* prepare data structure for kernel */
1184
1185         data.fd = fsock;
1186         memcpy((char *) &data.addr, (char *) nfs_saddr, sizeof(data.addr));
1187         strncpy(data.hostname, hostname, sizeof(data.hostname));
1188
1189  out_ok:
1190         /* Ensure we have enough padding for the following strcat()s */
1191         if (strlen(new_opts) + strlen(s) + 30 >= sizeof(new_opts)) {
1192                 fprintf(stderr, _("mount: "
1193                                   "excessively long option argument\n"));
1194                 goto fail;
1195         }
1196
1197         snprintf(cbuf, sizeof(cbuf)-1, "addr=%s", s);
1198         strcat(new_opts, cbuf);
1199
1200         *extra_opts = xstrdup(new_opts);
1201         *need_statd = ! (data.flags & NFS_MOUNT_NONLM);
1202         return 0;
1203
1204         /* abort */
1205  fail:
1206         if (fsock != -1)
1207                 close(fsock);
1208         return retval;
1209 }
1210
1211 /*
1212  * We need to translate between nfs status return values and
1213  * the local errno values which may not be the same.
1214  *
1215  * Andreas Schwab <schwab@LS5.informatik.uni-dortmund.de>: change errno:
1216  * "after #include <errno.h> the symbol errno is reserved for any use,
1217  *  it cannot even be used as a struct tag or field name".
1218  */
1219
1220 #ifndef EDQUOT
1221 #define EDQUOT  ENOSPC
1222 #endif
1223
1224 static struct {
1225         enum nfsstat stat;
1226         int errnum;
1227 } nfs_errtbl[] = {
1228         { NFS_OK,               0               },
1229         { NFSERR_PERM,          EPERM           },
1230         { NFSERR_NOENT,         ENOENT          },
1231         { NFSERR_IO,            EIO             },
1232         { NFSERR_NXIO,          ENXIO           },
1233         { NFSERR_ACCES,         EACCES          },
1234         { NFSERR_EXIST,         EEXIST          },
1235         { NFSERR_NODEV,         ENODEV          },
1236         { NFSERR_NOTDIR,        ENOTDIR         },
1237         { NFSERR_ISDIR,         EISDIR          },
1238 #ifdef NFSERR_INVAL
1239         { NFSERR_INVAL,         EINVAL          },      /* that Sun forgot */
1240 #endif
1241         { NFSERR_FBIG,          EFBIG           },
1242         { NFSERR_NOSPC,         ENOSPC          },
1243         { NFSERR_ROFS,          EROFS           },
1244         { NFSERR_NAMETOOLONG,   ENAMETOOLONG    },
1245         { NFSERR_NOTEMPTY,      ENOTEMPTY       },
1246         { NFSERR_DQUOT,         EDQUOT          },
1247         { NFSERR_STALE,         ESTALE          },
1248 #ifdef EWFLUSH
1249         { NFSERR_WFLUSH,        EWFLUSH         },
1250 #endif
1251         /* Throw in some NFSv3 values for even more fun (HP returns these) */
1252         { 71,                   EREMOTE         },
1253
1254         { -1,                   EIO             }
1255 };
1256
1257 static char *nfs_strerror(int stat)
1258 {
1259         int i;
1260         static char buf[256];
1261
1262         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
1263                 if (nfs_errtbl[i].stat == stat)
1264                         return strerror(nfs_errtbl[i].errnum);
1265         }
1266         sprintf(buf, _("unknown nfs status return value: %d"), stat);
1267         return buf;
1268 }