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 "nfsmount.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
 108 /* Convert RPC errors into strings */
 109 int rpc_strerror(int);
 110 int rpc_strerror(int spos)
 111 {
 112         int cf_stat = rpc_createerr.cf_stat;
 113         int pos=0, cf_errno = rpc_createerr.cf_error.re_errno;
 114         char *ptr, *estr = clnt_sperrno(cf_stat);
 115         char *tmp;
 116
 117         if (estr) {
 118                 if ((ptr = index(estr, ':')))
 119                         estr = ++ptr;
 120
 121                 tmp = &errbuf[spos];
 122                 if (cf_stat == RPC_SYSTEMERROR)
 123                         pos = snprintf(tmp, (erreob - tmp),
 124                                 "System Error: %s", strerror(cf_errno));
 125                 else
 126                         pos = snprintf(tmp, (erreob - tmp), "RPC Error:%s", estr);
 127         }
 128         return (pos);
 129 }
 130 void mount_errors(char *, int, int);
 131 void mount_errors(char *server, int will_retry, int bg)
 132 {
 133         int pos = 0;
 134         char *tmp;
 135         static int onlyonce = 0;
 136
 137         tmp = &errbuf[pos];
 138         if (bg)
 139                 pos = snprintf(tmp, (erreob - tmp),
 140                         "mount to NFS server '%s' failed: ", server);
 141         else
 142                 pos = snprintf(tmp, (erreob - tmp),
 143                         "mount: mount to NFS server '%s' failed: ", server);
 144
 145         tmp = &errbuf[pos];
 146         if (rpc_createerr.cf_stat == RPC_TIMEDOUT) {
 147                 pos = snprintf(tmp, (erreob - tmp), "timed out %s",
 148                         will_retry ? "(retrying)" : "(giving up)");
 149         } else {
 150                 pos += rpc_strerror(pos);
 151                 tmp = &errbuf[pos];
 152                 if (bg) {
 153                         pos = snprintf(tmp, (erreob - tmp), " %s",
 154                                 will_retry ? "(retrying)" : "(giving up)");
 155                 }
 156         }
 157         if (bg) {
 158                 if (onlyonce++ < 1)
 159                         openlog("mount", LOG_CONS|LOG_PID, LOG_AUTH);
 160                 syslog(LOG_ERR, "%s.", errbuf);
 161         } else
 162                 fprintf(stderr, "%s.\n", errbuf);
 163 }
 164
 165 /* Define the order in which to probe for UDP/TCP services */
 166 enum plist {
 167         use_tcp = 0,
 168         udp_tcp,
 169         udp_only,
 170 };
 171 static const u_int *
 172 proto_probelist(enum plist list)
 173 {
 174         static const u_int probe_udp_tcp[] = { IPPROTO_UDP, IPPROTO_TCP, 0 };
 175         static const u_int probe_both[] = { IPPROTO_TCP, IPPROTO_UDP, 0 };
 176         static const u_int probe_udponly[] = { IPPROTO_UDP, 0 };
 177
 178         if (list == use_tcp)
 179                 return probe_both;
 180         if (list == udp_tcp)
 181                 return probe_udp_tcp;
 182         return probe_udponly;
 183 }
 184
 185 /* Define the order in which NFS versions are probed on portmapper */
 186 static const u_long *
 187 nfs_probelist(const int vers)
 188 {
 189         static const u_long nfs2_probe[] = { 2, 0};
 190         static const u_long nfs3_probe[] = { 3, 2, 0};
 191         switch (vers) {
 192         case 3:
 193                 return nfs3_probe;
 194         default:
 195                 return nfs2_probe;
 196         }
 197 }
 198
 199 /* Define the order in which Mountd versions are probed on portmapper */
 200 static const u_long *
 201 mnt_probelist(const int vers)
 202 {
 203         static const u_long mnt1_probe[] = { 1, 2, 0 };
 204         static const u_long mnt3_probe[] = { 3, 1, 2, 0 };
 205         switch (vers) {
 206         case 3:
 207                 return mnt3_probe;
 208         default:
 209                 return mnt1_probe;
 210         }
 211 }
 212
 213 static int
 214 linux_version_code(void) {
 215         struct utsname my_utsname;
 216         int p, q, r;
 217
 218         if (uname(&my_utsname) == 0) {
 219                 p = atoi(strtok(my_utsname.release, "."));
 220                 q = atoi(strtok(NULL, "."));
 221                 r = atoi(strtok(NULL, "."));
 222                 return MAKE_VERSION(p,q,r);
 223         }
 224         return 0;
 225 }
 226
 227 /*
 228  * Unfortunately, the kernel prints annoying console messages
 229  * in case of an unexpected nfs mount version (instead of
 230  * just returning some error).  Therefore we'll have to try
 231  * and figure out what version the kernel expects.
 232  *
 233  * Variables:
 234  *      NFS_MOUNT_VERSION: these nfsmount sources at compile time
 235  *      nfs_mount_version: version this source and running kernel can handle
 236  */
 237 int nfs_mount_version = NFS_MOUNT_VERSION;
 238
 239 int
 240 find_kernel_nfs_mount_version(void) {
 241         static int kernel_version = -1;
 242         int mnt_version = NFS_MOUNT_VERSION;
 243
 244         if (kernel_version == -1)
 245                 kernel_version = linux_version_code();
 246
 247         if (kernel_version) {
 248              if (kernel_version < MAKE_VERSION(2,1,32))
 249                   mnt_version = 1;
 250              else if (kernel_version < MAKE_VERSION(2,2,18))
 251                   mnt_version = 3;
 252              else if (kernel_version < MAKE_VERSION(2,3,0))
 253                   mnt_version = 4; /* since 2.2.18pre9 */
 254              else if (kernel_version < MAKE_VERSION(2,3,99))
 255                   mnt_version = 3;
 256              else if (kernel_version < MAKE_VERSION(2,6,3))
 257                   mnt_version = 4;
 258              else
 259                   mnt_version = 6;
 260         }
 261         if (mnt_version > NFS_MOUNT_VERSION)
 262              mnt_version = NFS_MOUNT_VERSION;
 263         return mnt_version;
 264 }
 265
 266 int nfs_gethostbyname(const char *, struct sockaddr_in *);
 267 int nfs_gethostbyname(const char *hostname, struct sockaddr_in *saddr)
 268 {
 269         struct hostent *hp;
 270
 271         saddr->sin_family = AF_INET;
 272         if (!inet_aton(hostname, &saddr->sin_addr)) {
 273                 if ((hp = gethostbyname(hostname)) == NULL) {
 274                         fprintf(stderr, _("mount: can't get address for %s\n"),
 275                                 hostname);
 276                         return 0;
 277                 } else {
 278                         if (hp->h_length > sizeof(*saddr)) {
 279                                 fprintf(stderr,
 280                                         _("mount: got bad hp->h_length\n"));
 281                                 hp->h_length = sizeof(*saddr);
 282                         }
 283                         memcpy(&saddr->sin_addr, hp->h_addr, hp->h_length);
 284                 }
 285         }
 286         return 1;
 287 }
 288
 289 /*
 290  * getport() is very similar to pmap_getport() with
 291  * the exception this version uses a non-reserve ports
 292  * instead of reserve ports since reserve ports
 293  * are not needed for pmap requests.
 294  */
 295 static u_short
 296 getport(
 297         struct sockaddr_in *saddr,
 298         u_long prog,
 299         u_long vers,
 300         u_int prot)
 301 {
 302         u_short port;
 303         int    socket;
 304         CLIENT *clnt = NULL;
 305         struct pmap parms;
 306         enum clnt_stat stat;
 307
 308         saddr->sin_port = htons (PMAPPORT);
 309         socket = get_socket(saddr, prot, FALSE);
 310
 311         switch (prot) {
 312         case IPPROTO_UDP:
 313                 clnt = clntudp_bufcreate(saddr,
 314                                          PMAPPROG, PMAPVERS, TIMEOUT, &socket,
 315                                          UDPMSGSIZE, UDPMSGSIZE);
 316                 break;
 317         case IPPROTO_TCP:
 318                 clnt = clnttcp_create(saddr,
 319                         PMAPPROG, PMAPVERS, &socket, 50, 500);
 320                 break;
 321         }
 322         if (clnt != NULL) {
 323                 parms.pm_prog = prog;
 324                 parms.pm_vers = vers;
 325                 parms.pm_prot = prot;
 326                 parms.pm_port = 0;    /* not needed or used */
 327
 328                 stat = clnt_call(clnt, PMAPPROC_GETPORT, (xdrproc_t)xdr_pmap,
 329                         (caddr_t)&parms, (xdrproc_t)xdr_u_short, (caddr_t)&port, TIMEOUT);
 330                 if (stat) {
 331                         clnt_geterr(clnt, &rpc_createerr.cf_error);
 332                         rpc_createerr.cf_stat = stat;
 333                 }
 334                 clnt_destroy(clnt);
 335                 if (stat != RPC_SUCCESS)
 336                         port = 0;
 337                 else if (port == 0)
 338                         rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
 339         }
 340         if (socket != 1)
 341                 close(socket);
 342
 343         return port;
 344 }
 345
 346 /*
 347  * Use the portmapper to discover whether or not the service we want is
 348  * available. The lists 'versions' and 'protos' define ordered sequences
 349  * of service versions and udp/tcp protocols to probe for.
 350  */
 351 static int
 352 probe_port(clnt_addr_t *server,
 353            const u_long *versions,
 354            const u_int *protos)
 355 {
 356         struct sockaddr_in *saddr = &server->saddr;
 357         struct pmap *pmap = &server->pmap;
 358         const u_long prog = pmap->pm_prog, *p_vers;
 359         const u_int prot = (u_int)pmap->pm_prot,
 360                 *p_prot;
 361         const u_short port = (u_short) pmap->pm_port;
 362         u_long vers = pmap->pm_vers;
 363         u_short p_port;
 364         p_prot = prot ? &prot : protos;
 365         p_vers = vers ? &vers : versions;
 366         rpc_createerr.cf_stat = 0;
 367         for (;;) {
 368                 saddr->sin_port = htons(PMAPPORT);
 369                 p_port = getport(saddr, prog, *p_vers, *p_prot);
 370                 if (p_port) {
 371                         if (!port || port == p_port) {
 372                                 saddr->sin_port = htons(p_port);
 373                                 if (verbose) {
 374                                         fprintf(stderr,
 375                                                 "mount: trying %s prog %ld vers %ld prot %s port %d\n",
 376                                                 inet_ntoa(saddr->sin_addr), prog, *p_vers,
 377                                                 *p_prot == IPPROTO_UDP ? "udp" : "tcp", p_port);
 378                                 }
 379                                 if (clnt_ping(saddr, prog, *p_vers, *p_prot, NULL))
 380                                         goto out_ok;
 381                                 if (rpc_createerr.cf_stat == RPC_TIMEDOUT)
 382                                         goto out_bad;
 383                         }
 384                 }
 385                 if (rpc_createerr.cf_stat != RPC_PROGNOTREGISTERED)
 386                         goto out_bad;
 387
 388                 if (!prot) {
 389                         if (*++p_prot)
 390                                 continue;
 391                         p_prot = protos;
 392                 }
 393                 if (vers == pmap->pm_vers) {
 394                         p_vers = versions;
 395                         vers = 0;
 396                 }
 397                 if (vers || !*++p_vers)
 398                         break;
 399         }
 400 out_bad:
 401         return 0;
 402
 403  out_ok:
 404         if (!vers)
 405                 pmap->pm_vers = *p_vers;
 406         if (!prot)
 407                 pmap->pm_prot = *p_prot;
 408         if (!port)
 409                 pmap->pm_port = p_port;
 410         rpc_createerr.cf_stat = 0;
 411         return 1;
 412 }
 413
 414 static int
 415 probe_nfsport(clnt_addr_t *nfs_server)
 416 {
 417         const struct pmap *pmap = &nfs_server->pmap;
 418         const u_long *probe_vers;
 419         const u_int *probe_prot;
 420
 421         if (pmap->pm_vers && pmap->pm_prot && pmap->pm_port)
 422                 return 1;
 423         probe_vers = nfs_probelist(MAX_NFSPROT);
 424         probe_prot = proto_probelist(HAVE_RELIABLE_TCP ? use_tcp : udp_only);
 425         return probe_port(nfs_server, probe_vers, probe_prot);
 426 }
 427
 428 int probe_mntport(clnt_addr_t *mnt_server)
 429 {
 430         const struct pmap *pmap = &mnt_server->pmap;
 431         const u_long *probe_vers;
 432         const u_int *probe_prot;
 433
 434         if (pmap->pm_vers && pmap->pm_prot && pmap->pm_port)
 435                 return 1;
 436         probe_vers = mnt_probelist(MAX_MNTPROT);
 437         probe_prot = proto_probelist(HAVE_RELIABLE_TCP ? udp_tcp : udp_only);
 438         return probe_port(mnt_server, probe_vers, probe_prot);
 439 }
 440
 441 static int
 442 probe_bothports(clnt_addr_t *mnt_server, clnt_addr_t *nfs_server)
 443 {
 444         struct pmap *nfs_pmap = &nfs_server->pmap;
 445         struct pmap *mnt_pmap = &mnt_server->pmap;
 446         struct pmap save_nfs, save_mnt;
 447         int res;
 448         const u_long *probe_vers;
 449
 450         if (mnt_pmap->pm_vers && !nfs_pmap->pm_vers)
 451                 nfs_pmap->pm_vers = mntvers_to_nfs(mnt_pmap->pm_vers);
 452         else if (nfs_pmap->pm_vers && !mnt_pmap->pm_vers)
 453                 mnt_pmap->pm_vers = nfsvers_to_mnt(nfs_pmap->pm_vers);
 454         if (nfs_pmap->pm_vers)
 455                 goto version_fixed;
 456         memcpy(&save_nfs, nfs_pmap, sizeof(save_nfs));
 457         memcpy(&save_mnt, mnt_pmap, sizeof(save_mnt));
 458         for (probe_vers = mnt_probelist(MAX_MNTPROT); *probe_vers; probe_vers++) {
 459                 nfs_pmap->pm_vers = mntvers_to_nfs(*probe_vers);
 460                 if ((res = probe_nfsport(nfs_server) != 0)) {
 461                         mnt_pmap->pm_vers = nfsvers_to_mnt(nfs_pmap->pm_vers);
 462                         if ((res = probe_mntport(mnt_server)) != 0)
 463                                 return 1;
 464                         memcpy(mnt_pmap, &save_mnt, sizeof(*mnt_pmap));
 465                 }
 466                 switch (rpc_createerr.cf_stat) {
 467                 case RPC_PROGVERSMISMATCH:
 468                 case RPC_PROGNOTREGISTERED:
 469                         break;
 470                 default:
 471                         goto out_bad;
 472                 }
 473                 memcpy(nfs_pmap, &save_nfs, sizeof(*nfs_pmap));
 474         }
 475  out_bad:
 476         return 0;
 477  version_fixed:
 478         if (!probe_nfsport(nfs_server))
 479                 goto out_bad;
 480         return probe_mntport(mnt_server);
 481 }
 482
 483 static inline enum clnt_stat
 484 nfs3_mount(CLIENT *clnt, mnt3arg_t *mnt3arg, mnt3res_t *mnt3res)
 485 {
 486         return clnt_call(clnt, MOUNTPROC3_MNT,
 487                          (xdrproc_t) xdr_dirpath, (caddr_t) mnt3arg,
 488                          (xdrproc_t) xdr_mountres3, (caddr_t) mnt3res,
 489                          TIMEOUT);
 490 }
 491
 492 static inline enum clnt_stat
 493 nfs2_mount(CLIENT *clnt, mnt2arg_t *mnt2arg, mnt2res_t *mnt2res)
 494 {
 495         return clnt_call(clnt, MOUNTPROC_MNT,
 496                          (xdrproc_t) xdr_dirpath, (caddr_t) mnt2arg,
 497                          (xdrproc_t) xdr_fhstatus, (caddr_t) mnt2res,
 498                          TIMEOUT);
 499 }
 500
 501 static int
 502 nfs_call_mount(clnt_addr_t *mnt_server, clnt_addr_t *nfs_server,
 503                mntarg_t *mntarg, mntres_t *mntres)
 504 {
 505         CLIENT *clnt;
 506         enum clnt_stat stat;
 507         int msock;
 508
 509         if (!probe_bothports(mnt_server, nfs_server))
 510                 goto out_bad;
 511
 512         clnt = mnt_openclnt(mnt_server, &msock);
 513         if (!clnt)
 514                 goto out_bad;
 515         /* make pointers in xdr_mountres3 NULL so
 516          * that xdr_array allocates memory for us
 517          */
 518         memset(mntres, 0, sizeof(*mntres));
 519         switch (mnt_server->pmap.pm_vers) {
 520         case 3:
 521                 stat = nfs3_mount(clnt, mntarg, &mntres->nfsv3);
 522                 break;
 523         case 2:
 524         case 1:
 525                 stat = nfs2_mount(clnt, mntarg, &mntres->nfsv2);
 526                 break;
 527         default:
 528                 goto out_bad;
 529         }
 530         if (stat != RPC_SUCCESS) {
 531                 clnt_geterr(clnt, &rpc_createerr.cf_error);
 532                 rpc_createerr.cf_stat = stat;
 533         }
 534         mnt_closeclnt(clnt, msock);
 535         if (stat == RPC_SUCCESS)
 536                 return 1;
 537  out_bad:
 538         return 0;
 539 }
 540
 541 static int
 542 parse_options(char *old_opts, struct nfs_mount_data *data,
 543               int *bg, int *retry, clnt_addr_t *mnt_server,
 544               clnt_addr_t *nfs_server, char *new_opts, const int opt_size)
 545 {
 546         struct sockaddr_in *mnt_saddr = &mnt_server->saddr;
 547         struct pmap *mnt_pmap = &mnt_server->pmap;
 548         struct pmap *nfs_pmap = &nfs_server->pmap;
 549         int len;
 550         char *opt, *opteq;
 551         char *mounthost = NULL;
 552         char cbuf[128];
 553
 554         data->flags = 0;
 555         *bg = 0;
 556
 557         len = strlen(new_opts);
 558         for (opt = strtok(old_opts, ","); opt; opt = strtok(NULL, ",")) {
 559                 if (strlen(opt) >= sizeof(cbuf))
 560                         goto bad_parameter;
 561                 if ((opteq = strchr(opt, '=')) && isdigit(opteq[1])) {
 562                         int val = atoi(opteq + 1);
 563                         *opteq = '\0';
 564 /* printf("opt=%s\n", opt); */
 565                         if (!strcmp(opt, "rsize"))
 566                                 data->rsize = val;
 567                         else if (!strcmp(opt, "wsize"))
 568                                 data->wsize = val;
 569                         else if (!strcmp(opt, "timeo"))
 570                                 data->timeo = val;
 571                         else if (!strcmp(opt, "retrans"))
 572                                 data->retrans = val;
 573                         else if (!strcmp(opt, "acregmin"))
 574                                 data->acregmin = val;
 575                         else if (!strcmp(opt, "acregmax"))
 576                                 data->acregmax = val;
 577                         else if (!strcmp(opt, "acdirmin"))
 578                                 data->acdirmin = val;
 579                         else if (!strcmp(opt, "acdirmax"))
 580                                 data->acdirmax = val;
 581                         else if (!strcmp(opt, "actimeo")) {
 582                                 data->acregmin = val;
 583                                 data->acregmax = val;
 584                                 data->acdirmin = val;
 585                                 data->acdirmax = val;
 586                         }
 587                         else if (!strcmp(opt, "retry"))
 588                                 *retry = val;
 589                         else if (!strcmp(opt, "port"))
 590                                 nfs_pmap->pm_port = val;
 591                         else if (!strcmp(opt, "mountport"))
 592                                 mnt_pmap->pm_port = val;
 593                         else if (!strcmp(opt, "mountprog"))
 594                                 mnt_pmap->pm_prog = val;
 595                         else if (!strcmp(opt, "mountvers"))
 596                                 mnt_pmap->pm_vers = val;
 597                         else if (!strcmp(opt, "mounthost"))
 598                                 mounthost=xstrndup(opteq+1, strcspn(opteq+1," \t\n\r,"));
 599                         else if (!strcmp(opt, "nfsprog"))
 600                                 nfs_pmap->pm_prog = val;
 601                         else if (!strcmp(opt, "nfsvers") ||
 602                                  !strcmp(opt, "vers")) {
 603                                 nfs_pmap->pm_vers = val;
 604                                 opt = "nfsvers";
 605 #if NFS_MOUNT_VERSION >= 2
 606                         } else if (!strcmp(opt, "namlen")) {
 607                                 if (nfs_mount_version >= 2)
 608                                         data->namlen = val;
 609                                 else
 610                                         goto bad_parameter;
 611 #endif
 612                         } else if (!strcmp(opt, "addr")) {
 613                                 /* ignore */;
 614                                 continue;
 615                         } else
 616                                 goto bad_parameter;
 617                         sprintf(cbuf, "%s=%s,", opt, opteq+1);
 618                 } else if (opteq) {
 619                         *opteq = '\0';
 620                         if (!strcmp(opt, "proto")) {
 621                                 if (!strcmp(opteq+1, "udp")) {
 622                                         nfs_pmap->pm_prot = IPPROTO_UDP;
 623                                         mnt_pmap->pm_prot = IPPROTO_UDP;
 624 #if NFS_MOUNT_VERSION >= 2
 625                                         data->flags &= ~NFS_MOUNT_TCP;
 626                                 } else if (!strcmp(opteq+1, "tcp") &&
 627                                            nfs_mount_version > 2) {
 628                                         nfs_pmap->pm_prot = IPPROTO_TCP;
 629                                         mnt_pmap->pm_prot = IPPROTO_TCP;
 630                                         data->flags |= NFS_MOUNT_TCP;
 631 #endif
 632                                 } else
 633                                         goto bad_parameter;
 634 #if NFS_MOUNT_VERSION >= 5
 635                         } else if (!strcmp(opt, "sec")) {
 636                                 char *secflavor = opteq+1;
 637                                 /* see RFC 2623 */
 638                                 if (nfs_mount_version < 5) {
 639                                         printf(_("Warning: ignoring sec=%s option\n"), secflavor);
 640                                         continue;
 641                                 } else if (!strcmp(secflavor, "sys"))
 642                                         data->pseudoflavor = AUTH_SYS;
 643                                 else if (!strcmp(secflavor, "krb5"))
 644                                         data->pseudoflavor = AUTH_GSS_KRB5;
 645                                 else if (!strcmp(secflavor, "krb5i"))
 646                                         data->pseudoflavor = AUTH_GSS_KRB5I;
 647                                 else if (!strcmp(secflavor, "krb5p"))
 648                                         data->pseudoflavor = AUTH_GSS_KRB5P;
 649                                 else if (!strcmp(secflavor, "lipkey"))
 650                                         data->pseudoflavor = AUTH_GSS_LKEY;
 651                                 else if (!strcmp(secflavor, "lipkey-i"))
 652                                         data->pseudoflavor = AUTH_GSS_LKEYI;
 653                                 else if (!strcmp(secflavor, "lipkey-p"))
 654                                         data->pseudoflavor = AUTH_GSS_LKEYP;
 655                                 else if (!strcmp(secflavor, "spkm3"))
 656                                         data->pseudoflavor = AUTH_GSS_SPKM;
 657                                 else if (!strcmp(secflavor, "spkm3i"))
 658                                         data->pseudoflavor = AUTH_GSS_SPKMI;
 659                                 else if (!strcmp(secflavor, "spkm3p"))
 660                                         data->pseudoflavor = AUTH_GSS_SPKMP;
 661                                 else {
 662                                         printf(_("Warning: Unrecognized security flavor %s.\n"),
 663                                                 secflavor);
 664                                         goto bad_parameter;
 665                                 }
 666                                 data->flags |= NFS_MOUNT_SECFLAVOUR;
 667 #endif
 668                         } else if (!strcmp(opt, "mounthost"))
 669                                 mounthost=xstrndup(opteq+1,
 670                                                    strcspn(opteq+1," \t\n\r,"));
 671                          else if (!strcmp(opt, "context")) {
 672                                 char *context = opteq + 1;
 673
 674                                 if (strlen(context) > NFS_MAX_CONTEXT_LEN) {
 675                                         printf(_("context parameter exceeds limit of %d\n"),
 676                                                  NFS_MAX_CONTEXT_LEN);
 677                                         goto bad_parameter;
 678                                 }
 679                                 strncpy(data->context, context, NFS_MAX_CONTEXT_LEN);
 680                         } else
 681                                 goto bad_parameter;
 682                         sprintf(cbuf, "%s=%s,", opt, opteq+1);
 683                 } else {
 684                         int val = 1;
 685                         if (!strncmp(opt, "no", 2)) {
 686                                 val = 0;
 687                                 opt += 2;
 688                         }
 689                         if (!strcmp(opt, "bg"))
 690                                 *bg = val;
 691                         else if (!strcmp(opt, "fg"))
 692                                 *bg = !val;
 693                         else if (!strcmp(opt, "soft")) {
 694                                 data->flags &= ~NFS_MOUNT_SOFT;
 695                                 if (val)
 696                                         data->flags |= NFS_MOUNT_SOFT;
 697                         } else if (!strcmp(opt, "hard")) {
 698                                 data->flags &= ~NFS_MOUNT_SOFT;
 699                                 if (!val)
 700                                         data->flags |= NFS_MOUNT_SOFT;
 701                         } else if (!strcmp(opt, "intr")) {
 702                                 data->flags &= ~NFS_MOUNT_INTR;
 703                                 if (val)
 704                                         data->flags |= NFS_MOUNT_INTR;
 705                         } else if (!strcmp(opt, "posix")) {
 706                                 data->flags &= ~NFS_MOUNT_POSIX;
 707                                 if (val)
 708                                         data->flags |= NFS_MOUNT_POSIX;
 709                         } else if (!strcmp(opt, "cto")) {
 710                                 data->flags &= ~NFS_MOUNT_NOCTO;
 711                                 if (!val)
 712                                         data->flags |= NFS_MOUNT_NOCTO;
 713                         } else if (!strcmp(opt, "ac")) {
 714                                 data->flags &= ~NFS_MOUNT_NOAC;
 715                                 if (!val)
 716                                         data->flags |= NFS_MOUNT_NOAC;
 717 #if NFS_MOUNT_VERSION >= 2
 718                         } else if (!strcmp(opt, "tcp")) {
 719                                 data->flags &= ~NFS_MOUNT_TCP;
 720                                 if (val) {
 721                                         if (nfs_mount_version < 2)
 722                                                 goto bad_option;
 723                                         nfs_pmap->pm_prot = IPPROTO_TCP;
 724                                         mnt_pmap->pm_prot = IPPROTO_TCP;
 725                                         data->flags |= NFS_MOUNT_TCP;
 726                                 } else {
 727                                         mnt_pmap->pm_prot = IPPROTO_UDP;
 728                                         nfs_pmap->pm_prot = IPPROTO_UDP;
 729                                 }
 730                         } else if (!strcmp(opt, "udp")) {
 731                                 data->flags &= ~NFS_MOUNT_TCP;
 732                                 if (!val) {
 733                                         if (nfs_mount_version < 2)
 734                                                 goto bad_option;
 735                                         nfs_pmap->pm_prot = IPPROTO_TCP;
 736                                         mnt_pmap->pm_prot = IPPROTO_TCP;
 737                                         data->flags |= NFS_MOUNT_TCP;
 738                                 } else {
 739                                         nfs_pmap->pm_prot = IPPROTO_UDP;
 740                                         mnt_pmap->pm_prot = IPPROTO_UDP;
 741                                 }
 742 #endif
 743 #if NFS_MOUNT_VERSION >= 3
 744                         } else if (!strcmp(opt, "lock")) {
 745                                 data->flags &= ~NFS_MOUNT_NONLM;
 746                                 if (!val) {
 747                                         if (nfs_mount_version < 3)
 748                                                 goto bad_option;
 749                                         data->flags |= NFS_MOUNT_NONLM;
 750                                 }
 751 #endif
 752 #if NFS_MOUNT_VERSION >= 4
 753                         } else if (!strcmp(opt, "broken_suid")) {
 754                                 data->flags &= ~NFS_MOUNT_BROKEN_SUID;
 755                                 if (val) {
 756                                         if (nfs_mount_version < 4)
 757                                                 goto bad_option;
 758                                         data->flags |= NFS_MOUNT_BROKEN_SUID;
 759                                 }
 760                         } else if (!strcmp(opt, "acl")) {
 761                                 data->flags &= ~NFS_MOUNT_NOACL;
 762                                 if (!val)
 763                                         data->flags |= NFS_MOUNT_NOACL;
 764 #endif
 765                         } else {
 766                         bad_option:
 767                                 printf(_("Unsupported nfs mount option: "
 768                                          "%s%s\n"), val ? "" : "no", opt);
 769                                 goto out_bad;
 770                         }
 771                         sprintf(cbuf, val ? "%s,":"no%s,", opt);
 772                 }
 773                 len += strlen(cbuf);
 774                 if (len >= opt_size) {
 775                         printf(_("mount: excessively long option argument\n"));
 776                         goto out_bad;
 777                 }
 778                 strcat(new_opts, cbuf);
 779         }
 780         /* See if the nfs host = mount host. */
 781         if (mounthost) {
 782                 if (!nfs_gethostbyname(mounthost, mnt_saddr))
 783                         goto out_bad;
 784                 *mnt_server->hostname = mounthost;
 785         }
 786         return 1;
 787  bad_parameter:
 788         printf(_("Bad nfs mount parameter: %s\n"), opt);
 789  out_bad:
 790         return 0;
 791 }
 792
 793 static inline int
 794 nfsmnt_check_compat(const struct pmap *nfs_pmap, const struct pmap *mnt_pmap)
 795 {
 796         if (nfs_pmap->pm_vers &&
 797                 (nfs_pmap->pm_vers > MAX_NFSPROT || nfs_pmap->pm_vers < 2)) {
 798                 if (nfs_pmap->pm_vers == 4)
 799                         fprintf(stderr, _("'vers=4' is not supported.  "
 800                                 "Use '-t nfs4' instead.\n"));
 801                 else
 802                         fprintf(stderr, _("NFS version %ld is not supported.\n"),
 803                                 nfs_pmap->pm_vers);
 804                 goto out_bad;
 805         }
 806         if (mnt_pmap->pm_vers > MAX_MNTPROT) {
 807                 fprintf(stderr, _("NFS mount version %ld s not supported.\n"),
 808                         mnt_pmap->pm_vers);
 809                 goto out_bad;
 810         }
 811         return 1;
 812  out_bad:
 813         return 0;
 814 }
 815
 816 int
 817 nfsmount(const char *spec, const char *node, int *flags,
 818          char **extra_opts, char **mount_opts, int *nfs_mount_vers,
 819          int running_bg)
 820 {
 821         static char *prev_bg_host;
 822         char hostdir[1024];
 823         char *hostname, *dirname, *old_opts, *mounthost = NULL;
 824         char new_opts[1024], cbuf[1024];
 825         static struct nfs_mount_data data;
 826         int val;
 827         static int doonce = 0;
 828
 829         clnt_addr_t mnt_server = { &mounthost, };
 830         clnt_addr_t nfs_server = { &hostname, };
 831         struct sockaddr_in *nfs_saddr = &nfs_server.saddr;
 832         struct pmap  *mnt_pmap = &mnt_server.pmap,
 833                      *nfs_pmap = &nfs_server.pmap;
 834         struct pmap  save_mnt, save_nfs;
 835
 836         int fsock;
 837
 838         mntres_t mntres;
 839
 840         struct stat statbuf;
 841         char *s;
 842         int bg, retry;
 843         int retval;
 844         time_t t;
 845         time_t prevt;
 846         time_t timeout;
 847
 848         /* The version to try is either specified or 0
 849            In case it is 0 we tell the caller what we tried */
 850         if (!*nfs_mount_vers)
 851                 *nfs_mount_vers = find_kernel_nfs_mount_version();
 852         nfs_mount_version = *nfs_mount_vers;
 853
 854         retval = EX_FAIL;
 855         fsock = -1;
 856         if (strlen(spec) >= sizeof(hostdir)) {
 857                 fprintf(stderr, _("mount: "
 858                                   "excessively long host:dir argument\n"));
 859                 goto fail;
 860         }
 861         strcpy(hostdir, spec);
 862         if ((s = strchr(hostdir, ':'))) {
 863                 hostname = hostdir;
 864                 dirname = s + 1;
 865                 *s = '\0';
 866                 /* Ignore all but first hostname in replicated mounts
 867                    until they can be fully supported. (mack@sgi.com) */
 868                 if ((s = strchr(hostdir, ','))) {
 869                         *s = '\0';
 870                         fprintf(stderr,
 871                                 _("mount: warning: "
 872                                   "multiple hostnames not supported\n"));
 873                 }
 874         } else {
 875                 fprintf(stderr,
 876                         _("mount: "
 877                           "directory to mount not in host:dir format\n"));
 878                 goto fail;
 879         }
 880
 881         if (!nfs_gethostbyname(hostname, nfs_saddr))
 882                 goto fail;
 883         mounthost = hostname;
 884         memcpy (&mnt_server.saddr, nfs_saddr, sizeof (mnt_server.saddr));
 885
 886         /* add IP address to mtab options for use when unmounting */
 887
 888         s = inet_ntoa(nfs_saddr->sin_addr);
 889         old_opts = *extra_opts;
 890         if (!old_opts)
 891                 old_opts = "";
 892
 893         /* Set default options.
 894          * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to
 895          * let the kernel decide.
 896          * timeo is filled in after we know whether it'll be TCP or UDP. */
 897         memset(&data, 0, sizeof(data));
 898         data.acregmin   = 3;
 899         data.acregmax   = 60;
 900         data.acdirmin   = 30;
 901         data.acdirmax   = 60;
 902 #if NFS_MOUNT_VERSION >= 2
 903         data.namlen     = NAME_MAX;
 904 #endif
 905         data.pseudoflavor = AUTH_SYS;
 906
 907         bg = 0;
 908         retry = 10000;          /* 10000 minutes ~ 1 week */
 909
 910         memset(mnt_pmap, 0, sizeof(*mnt_pmap));
 911         mnt_pmap->pm_prog = MOUNTPROG;
 912         memset(nfs_pmap, 0, sizeof(*nfs_pmap));
 913         nfs_pmap->pm_prog = NFS_PROGRAM;
 914
 915         /* parse options */
 916         new_opts[0] = 0;
 917         if (!parse_options(old_opts, &data, &bg, &retry, &mnt_server, &nfs_server,
 918                            new_opts, sizeof(new_opts)))
 919                 goto fail;
 920         if (!nfsmnt_check_compat(nfs_pmap, mnt_pmap))
 921                 goto fail;
 922
 923         if (retry == 10000 && !bg)
 924                 retry = 2; /* reset for fg mounts */
 925
 926
 927 #ifdef NFS_MOUNT_DEBUG
 928         printf("rsize = %d, wsize = %d, timeo = %d, retrans = %d\n",
 929                data.rsize, data.wsize, data.timeo, data.retrans);
 930         printf("acreg (min, max) = (%d, %d), acdir (min, max) = (%d, %d)\n",
 931                data.acregmin, data.acregmax, data.acdirmin, data.acdirmax);
 932         printf("port = %d, bg = %d, retry = %d, flags = %.8x\n",
 933                nfs_pmap->pm_port, bg, retry, data.flags);
 934         printf("mountprog = %d, mountvers = %d, nfsprog = %d, nfsvers = %d\n",
 935                mnt_pmap->pm_prog, mnt_pmap->pm_vers,
 936                nfs_pmap->pm_prog, nfs_pmap->pm_vers);
 937         printf("soft = %d, intr = %d, posix = %d, nocto = %d, noac = %d ",
 938                (data.flags & NFS_MOUNT_SOFT) != 0,
 939                (data.flags & NFS_MOUNT_INTR) != 0,
 940                (data.flags & NFS_MOUNT_POSIX) != 0,
 941                (data.flags & NFS_MOUNT_NOCTO) != 0,
 942                (data.flags & NFS_MOUNT_NOAC) != 0);
 943 #if NFS_MOUNT_VERSION >= 2
 944         printf("tcp = %d ",
 945                (data.flags & NFS_MOUNT_TCP) != 0);
 946 #endif
 947 #if NFS_MOUNT_VERSION >= 4
 948         printf("noacl = %d ", (data.flags & NFS_MOUNT_NOACL) != 0);
 949 #endif
 950 #if NFS_MOUNT_VERSION >= 5
 951         printf("sec = %u ", data.pseudoflavor);
 952 #endif
 953         printf("\n");
 954 #endif
 955
 956         data.version = nfs_mount_version;
 957         *mount_opts = (char *) &data;
 958
 959         if (*flags & MS_REMOUNT)
 960                 goto out_ok;
 961
 962         /*
 963          * If the previous mount operation on the same host was
 964          * backgrounded, and the "bg" for this mount is also set,
 965          * give up immediately, to avoid the initial timeout.
 966          */
 967         if (bg && !running_bg &&
 968             prev_bg_host && strcmp(hostname, prev_bg_host) == 0) {
 969                 if (retry > 0)
 970                         retval = EX_BG;
 971                 return retval;
 972         }
 973
 974         /* create mount deamon client */
 975
 976         /*
 977          * The following loop implements the mount retries. On the first
 978          * call, "running_bg" is 0. When the mount times out, and the
 979          * "bg" option is set, the exit status EX_BG will be returned.
 980          * For a backgrounded mount, there will be a second call by the
 981          * child process with "running_bg" set to 1.
 982          *
 983          * The case where the mount point is not present and the "bg"
 984          * option is set, is treated as a timeout. This is done to
 985          * support nested mounts.
 986          *
 987          * The "retry" count specified by the user is the number of
 988          * minutes to retry before giving up.
 989          *
 990          * Only the first error message will be displayed.
 991          */
 992         timeout = time(NULL) + 60 * retry;
 993         prevt = 0;
 994         t = 30;
 995         val = 1;
 996
 997         memcpy(&save_nfs, nfs_pmap, sizeof(save_nfs));
 998         memcpy(&save_mnt, mnt_pmap, sizeof(save_mnt));
 999         for (;;) {
1000                 if (bg && stat(node, &statbuf) == -1) {
1001                         /* no mount point yet - sleep */
1002                         if (running_bg) {
1003                                 sleep(val);     /* 1, 2, 4, 8, 16, 30, ... */
1004                                 val *= 2;
1005                                 if (val > 30)
1006                                         val = 30;
1007                         }
1008                 } else {
1009                         int stat;
1010                         /* be careful not to use too many CPU cycles */
1011                         if (t - prevt < 30)
1012                                 sleep(30);
1013
1014                         stat = nfs_call_mount(&mnt_server, &nfs_server,
1015                                               &dirname, &mntres);
1016                         if (stat)
1017                                 break;
1018                         memcpy(nfs_pmap, &save_nfs, sizeof(*nfs_pmap));
1019                         memcpy(mnt_pmap, &save_mnt, sizeof(*mnt_pmap));
1020                         prevt = t;
1021                 }
1022                 if (!bg) {
1023                         switch(rpc_createerr.cf_stat){
1024                         case RPC_TIMEDOUT:
1025                                 break;
1026                         case RPC_SYSTEMERROR:
1027                                 if (errno == ETIMEDOUT)
1028                                         break;
1029                         default:
1030                                 mount_errors(*nfs_server.hostname, 0, bg);
1031                         goto fail;
1032                         }
1033                         t = time(NULL);
1034                         if (t >= timeout) {
1035                                 mount_errors(*nfs_server.hostname, 0, bg);
1036                                 goto fail;
1037                         }
1038                         mount_errors(*nfs_server.hostname, 1, bg);
1039                         continue;
1040                 }
1041                 if (!running_bg) {
1042                         prev_bg_host = xstrdup(hostname);
1043                         if (retry > 0)
1044                                 retval = EX_BG;
1045                         goto fail;
1046                 }
1047                 t = time(NULL);
1048                 if (t >= timeout) {
1049                         mount_errors(*nfs_server.hostname, 0, bg);
1050                         goto fail;
1051                 }
1052                 if (doonce++ < 1)
1053                         mount_errors(*nfs_server.hostname, 1, bg);
1054         }
1055
1056         if (nfs_pmap->pm_vers == 2) {
1057                 if (mntres.nfsv2.fhs_status != 0) {
1058                         fprintf(stderr,
1059                                 _("mount: %s:%s failed, reason given by server: %s\n"),
1060                                 hostname, dirname,
1061                                 nfs_strerror(mntres.nfsv2.fhs_status));
1062                         goto fail;
1063                 }
1064                 memcpy(data.root.data,
1065                        (char *) mntres.nfsv2.fhstatus_u.fhs_fhandle,
1066                        NFS_FHSIZE);
1067 #if NFS_MOUNT_VERSION >= 4
1068                 data.root.size = NFS_FHSIZE;
1069                 memcpy(data.old_root.data,
1070                        (char *) mntres.nfsv2.fhstatus_u.fhs_fhandle,
1071                        NFS_FHSIZE);
1072 #endif
1073         } else {
1074 #if NFS_MOUNT_VERSION >= 4
1075                 mountres3_ok *mountres;
1076                 fhandle3 *fhandle;
1077                 int i, *flavor, yum = 0;
1078                 if (mntres.nfsv3.fhs_status != 0) {
1079                         fprintf(stderr,
1080                                 _("mount: %s:%s failed, reason given by server: %s\n"),
1081                                 hostname, dirname,
1082                                 nfs_strerror(mntres.nfsv3.fhs_status));
1083                         goto fail;
1084                 }
1085 #if NFS_MOUNT_VERSION >= 5
1086                 mountres = &mntres.nfsv3.mountres3_u.mountinfo;
1087                 i = mountres->auth_flavours.auth_flavours_len;
1088                 if (i <= 0)
1089                         goto noauth_flavours;
1090
1091                 flavor = mountres->auth_flavours.auth_flavours_val;
1092                 while (--i >= 0) {
1093                         if (flavor[i] == data.pseudoflavor)
1094                                 yum = 1;
1095 #ifdef NFS_MOUNT_DEBUG
1096                         printf("auth flavor %d: %d\n",
1097                                 i, flavor[i]);
1098 #endif
1099                 }
1100                 if (!yum) {
1101                         fprintf(stderr,
1102                                 "mount: %s:%s failed, "
1103                                 "security flavor not supported\n",
1104                                 hostname, dirname);
1105                         /* server has registered us in mtab, send umount */
1106                         nfs_call_umount(&mnt_server, &dirname);
1107                         goto fail;
1108                 }
1109 noauth_flavours:
1110 #endif
1111                 fhandle = &mntres.nfsv3.mountres3_u.mountinfo.fhandle;
1112                 memset(data.old_root.data, 0, NFS_FHSIZE);
1113                 memset(&data.root, 0, sizeof(data.root));
1114                 data.root.size = fhandle->fhandle3_len;
1115                 memcpy(data.root.data,
1116                        (char *) fhandle->fhandle3_val,
1117                        fhandle->fhandle3_len);
1118
1119                 data.flags |= NFS_MOUNT_VER3;
1120 #endif
1121         }
1122
1123         /* create nfs socket for kernel */
1124
1125         if (nfs_pmap->pm_prot == IPPROTO_TCP)
1126                 fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
1127         else
1128                 fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
1129         if (fsock < 0) {
1130                 perror(_("nfs socket"));
1131                 goto fail;
1132         }
1133         if (bindresvport(fsock, 0) < 0) {
1134                 perror(_("nfs bindresvport"));
1135                 goto fail;
1136         }
1137 #ifdef NFS_MOUNT_DEBUG
1138         printf(_("using port %d for nfs deamon\n"), nfs_pmap->pm_port);
1139 #endif
1140         nfs_saddr->sin_port = htons(nfs_pmap->pm_port);
1141         /*
1142          * connect() the socket for kernels 1.3.10 and below only,
1143          * to avoid problems with multihomed hosts.
1144          * --Swen
1145          */
1146         if (linux_version_code() <= 66314
1147             && connect(fsock, (struct sockaddr *) nfs_saddr,
1148                        sizeof (*nfs_saddr)) < 0) {
1149                 perror(_("nfs connect"));
1150                 goto fail;
1151         }
1152
1153 #if NFS_MOUNT_VERSION >= 2
1154         if (nfs_pmap->pm_prot == IPPROTO_TCP)
1155                 data.flags |= NFS_MOUNT_TCP;
1156         else
1157                 data.flags &= ~NFS_MOUNT_TCP;
1158 #endif
1159
1160         /* prepare data structure for kernel */
1161
1162         data.fd = fsock;
1163         memcpy((char *) &data.addr, (char *) nfs_saddr, sizeof(data.addr));
1164         strncpy(data.hostname, hostname, sizeof(data.hostname));
1165
1166  out_ok:
1167         /* Ensure we have enough padding for the following strcat()s */
1168         if (strlen(new_opts) + strlen(s) + 30 >= sizeof(new_opts)) {
1169                 fprintf(stderr, _("mount: "
1170                                   "excessively long option argument\n"));
1171                 goto fail;
1172         }
1173
1174         snprintf(cbuf, sizeof(cbuf)-1, "addr=%s", s);
1175         strcat(new_opts, cbuf);
1176
1177         *extra_opts = xstrdup(new_opts);
1178         return 0;
1179
1180         /* abort */
1181  fail:
1182         if (fsock != -1)
1183                 close(fsock);
1184         return retval;
1185 }
1186
1187 /*
1188  * We need to translate between nfs status return values and
1189  * the local errno values which may not be the same.
1190  *
1191  * Andreas Schwab <schwab@LS5.informatik.uni-dortmund.de>: change errno:
1192  * "after #include <errno.h> the symbol errno is reserved for any use,
1193  *  it cannot even be used as a struct tag or field name".
1194  */
1195
1196 #ifndef EDQUOT
1197 #define EDQUOT  ENOSPC
1198 #endif
1199
1200 static struct {
1201         enum nfsstat stat;
1202         int errnum;
1203 } nfs_errtbl[] = {
1204         { NFS_OK,               0               },
1205         { NFSERR_PERM,          EPERM           },
1206         { NFSERR_NOENT,         ENOENT          },
1207         { NFSERR_IO,            EIO             },
1208         { NFSERR_NXIO,          ENXIO           },
1209         { NFSERR_ACCES,         EACCES          },
1210         { NFSERR_EXIST,         EEXIST          },
1211         { NFSERR_NODEV,         ENODEV          },
1212         { NFSERR_NOTDIR,        ENOTDIR         },
1213         { NFSERR_ISDIR,         EISDIR          },
1214 #ifdef NFSERR_INVAL
1215         { NFSERR_INVAL,         EINVAL          },      /* that Sun forgot */
1216 #endif
1217         { NFSERR_FBIG,          EFBIG           },
1218         { NFSERR_NOSPC,         ENOSPC          },
1219         { NFSERR_ROFS,          EROFS           },
1220         { NFSERR_NAMETOOLONG,   ENAMETOOLONG    },
1221         { NFSERR_NOTEMPTY,      ENOTEMPTY       },
1222         { NFSERR_DQUOT,         EDQUOT          },
1223         { NFSERR_STALE,         ESTALE          },
1224 #ifdef EWFLUSH
1225         { NFSERR_WFLUSH,        EWFLUSH         },
1226 #endif
1227         /* Throw in some NFSv3 values for even more fun (HP returns these) */
1228         { 71,                   EREMOTE         },
1229
1230         { -1,                   EIO             }
1231 };
1232
1233 static char *nfs_strerror(int stat)
1234 {
1235         int i;
1236         static char buf[256];
1237
1238         for (i = 0; nfs_errtbl[i].stat != -1; i++) {
1239                 if (nfs_errtbl[i].stat == stat)
1240                         return strerror(nfs_errtbl[i].errnum);
1241         }
1242         sprintf(buf, _("unknown nfs status return value: %d"), stat);
1243         return buf;
1244 }