1 /* $NetBSD: getnetconfig.c,v 1.3 2000/07/06 03:10:34 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2009, Sun Microsystems, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are met: 9 * - Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * - Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * - Neither the name of Sun Microsystems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #if defined(LIBC_SCCS) && !defined(lint) 32 static char sccsid[] = "@(#)getnetconfig.c 1.12 91/12/19 SMI"; 33 #endif 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 /* 38 * Copyright (c) 1989 by Sun Microsystems, Inc. 39 */ 40 41 #include "namespace.h" 42 #include "reentrant.h" 43 #include <stdio.h> 44 #include <errno.h> 45 #include <netconfig.h> 46 #include <stddef.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <rpc/rpc.h> 50 #include <unistd.h> 51 #include "un-namespace.h" 52 #include "rpc_com.h" 53 54 /* 55 * The five library routines in this file provide application access to the 56 * system network configuration database, /etc/netconfig. In addition to the 57 * netconfig database and the routines for accessing it, the environment 58 * variable NETPATH and its corresponding routines in getnetpath.c may also be 59 * used to specify the network transport to be used. 60 */ 61 62 63 /* 64 * netconfig errors 65 */ 66 67 #define NC_NONETCONFIG ENOENT 68 #define NC_NOMEM ENOMEM 69 #define NC_NOTINIT EINVAL /* setnetconfig was not called first */ 70 #define NC_BADFILE EBADF /* format for netconfig file is bad */ 71 #define NC_NOTFOUND ENOPROTOOPT /* specified netid was not found */ 72 73 /* 74 * semantics as strings (should be in netconfig.h) 75 */ 76 #define NC_TPI_CLTS_S "tpi_clts" 77 #define NC_TPI_COTS_S "tpi_cots" 78 #define NC_TPI_COTS_ORD_S "tpi_cots_ord" 79 #define NC_TPI_RAW_S "tpi_raw" 80 81 /* 82 * flags as characters (also should be in netconfig.h) 83 */ 84 #define NC_NOFLAG_C '-' 85 #define NC_VISIBLE_C 'v' 86 #define NC_BROADCAST_C 'b' 87 88 /* 89 * Character used to indicate there is no name-to-address lookup library 90 */ 91 #define NC_NOLOOKUP "-" 92 93 static const char * const _nc_errors[] = { 94 "Netconfig database not found", 95 "Not enough memory", 96 "Not initialized", 97 "Netconfig database has invalid format", 98 "Netid not found in netconfig database" 99 }; 100 101 struct netconfig_info { 102 int eof; /* all entries has been read */ 103 int ref; /* # of times setnetconfig() has been called */ 104 struct netconfig_list *head; /* head of the list */ 105 struct netconfig_list *tail; /* last of the list */ 106 }; 107 108 struct netconfig_list { 109 char *linep; /* hold line read from netconfig */ 110 struct netconfig *ncp; 111 struct netconfig_list *next; 112 }; 113 114 struct netconfig_vars { 115 int valid; /* token that indicates a valid netconfig_vars */ 116 int flag; /* first time flag */ 117 struct netconfig_list *nc_configs; /* pointer to the current netconfig entry */ 118 }; 119 120 #define NC_VALID 0xfeed 121 #define NC_STORAGE 0xf00d 122 #define NC_INVALID 0 123 124 125 static int *__nc_error(void); 126 static int parse_ncp(char *, struct netconfig *); 127 static struct netconfig *dup_ncp(struct netconfig *); 128 129 130 static FILE *nc_file; /* for netconfig db */ 131 static mutex_t nc_file_lock = MUTEX_INITIALIZER; 132 133 static struct netconfig_info ni = { 0, 0, NULL, NULL}; 134 static mutex_t ni_lock = MUTEX_INITIALIZER; 135 136 static thread_key_t nc_key; 137 static once_t nc_once = ONCE_INITIALIZER; 138 static int nc_key_error; 139 140 static void 141 nc_key_init(void) 142 { 143 144 nc_key_error = thr_keycreate(&nc_key, free); 145 } 146 147 #define MAXNETCONFIGLINE 1000 148 149 static int * 150 __nc_error(void) 151 { 152 static int nc_error = 0; 153 int *nc_addr; 154 155 /* 156 * Use the static `nc_error' if we are the main thread 157 * (including non-threaded programs), or if an allocation 158 * fails. 159 */ 160 if (thr_main()) 161 return (&nc_error); 162 if (thr_once(&nc_once, nc_key_init) != 0 || nc_key_error != 0) 163 return (&nc_error); 164 if ((nc_addr = (int *)thr_getspecific(nc_key)) == NULL) { 165 nc_addr = (int *)malloc(sizeof (int)); 166 if (thr_setspecific(nc_key, (void *) nc_addr) != 0) { 167 free(nc_addr); 168 return (&nc_error); 169 } 170 *nc_addr = 0; 171 } 172 return (nc_addr); 173 } 174 175 #define nc_error (*(__nc_error())) 176 /* 177 * A call to setnetconfig() establishes a /etc/netconfig "session". A session 178 * "handle" is returned on a successful call. At the start of a session (after 179 * a call to setnetconfig()) searches through the /etc/netconfig database will 180 * proceed from the start of the file. The session handle must be passed to 181 * getnetconfig() to parse the file. Each call to getnetconfig() using the 182 * current handle will process one subsequent entry in /etc/netconfig. 183 * setnetconfig() must be called before the first call to getnetconfig(). 184 * (Handles are used to allow for nested calls to setnetpath()). 185 * 186 * A new session is established with each call to setnetconfig(), with a new 187 * handle being returned on each call. Previously established sessions remain 188 * active until endnetconfig() is called with that session's handle as an 189 * argument. 190 * 191 * setnetconfig() need *not* be called before a call to getnetconfigent(). 192 * setnetconfig() returns a NULL pointer on failure (for example, if 193 * the netconfig database is not present). 194 */ 195 void * 196 setnetconfig(void) 197 { 198 struct netconfig_vars *nc_vars; 199 200 if ((nc_vars = (struct netconfig_vars *)malloc(sizeof 201 (struct netconfig_vars))) == NULL) { 202 return(NULL); 203 } 204 205 /* 206 * For multiple calls, i.e. nc_file is not NULL, we just return the 207 * handle without reopening the netconfig db. 208 */ 209 mutex_lock(&ni_lock); 210 ni.ref++; 211 mutex_unlock(&ni_lock); 212 213 mutex_lock(&nc_file_lock); 214 if ((nc_file != NULL) || (nc_file = fopen(NETCONFIG, "r")) != NULL) { 215 nc_vars->valid = NC_VALID; 216 nc_vars->flag = 0; 217 nc_vars->nc_configs = ni.head; 218 mutex_unlock(&nc_file_lock); 219 return ((void *)nc_vars); 220 } 221 mutex_unlock(&nc_file_lock); 222 223 mutex_lock(&ni_lock); 224 ni.ref--; 225 mutex_unlock(&ni_lock); 226 227 nc_error = NC_NONETCONFIG; 228 free(nc_vars); 229 return (NULL); 230 } 231 232 233 /* 234 * When first called, getnetconfig() returns a pointer to the first entry in 235 * the netconfig database, formatted as a struct netconfig. On each subsequent 236 * call, getnetconfig() returns a pointer to the next entry in the database. 237 * getnetconfig() can thus be used to search the entire netconfig file. 238 * getnetconfig() returns NULL at end of file. 239 */ 240 241 struct netconfig * 242 getnetconfig(void *handlep) 243 { 244 struct netconfig_vars *ncp = (struct netconfig_vars *)handlep; 245 char *stringp; /* tmp string pointer */ 246 struct netconfig_list *list; 247 struct netconfig *np; 248 struct netconfig *result; 249 250 /* 251 * Verify that handle is valid 252 */ 253 mutex_lock(&nc_file_lock); 254 if (ncp == NULL || nc_file == NULL) { 255 nc_error = NC_NOTINIT; 256 mutex_unlock(&nc_file_lock); 257 return (NULL); 258 } 259 mutex_unlock(&nc_file_lock); 260 261 switch (ncp->valid) { 262 case NC_VALID: 263 /* 264 * If entry has already been read into the list, 265 * we return the entry in the linked list. 266 * If this is the first time call, check if there are any entries in 267 * linked list. If no entries, we need to read the netconfig db. 268 * If we have been here and the next entry is there, we just return 269 * it. 270 */ 271 if (ncp->flag == 0) { /* first time */ 272 ncp->flag = 1; 273 mutex_lock(&ni_lock); 274 ncp->nc_configs = ni.head; 275 mutex_unlock(&ni_lock); 276 if (ncp->nc_configs != NULL) /* entry already exist */ 277 return(ncp->nc_configs->ncp); 278 } 279 else if (ncp->nc_configs != NULL && ncp->nc_configs->next != NULL) { 280 ncp->nc_configs = ncp->nc_configs->next; 281 return(ncp->nc_configs->ncp); 282 } 283 284 /* 285 * If we cannot find the entry in the list and is end of file, 286 * we give up. 287 */ 288 mutex_lock(&ni_lock); 289 if (ni.eof == 1) { 290 mutex_unlock(&ni_lock); 291 return(NULL); 292 } 293 mutex_unlock(&ni_lock); 294 295 break; 296 default: 297 nc_error = NC_NOTINIT; 298 return (NULL); 299 } 300 301 stringp = (char *) malloc(MAXNETCONFIGLINE); 302 if (stringp == NULL) 303 return (NULL); 304 305 #ifdef MEM_CHK 306 if (malloc_verify() == 0) { 307 fprintf(stderr, "memory heap corrupted in getnetconfig\n"); 308 exit(1); 309 } 310 #endif 311 312 /* 313 * Read a line from netconfig file. 314 */ 315 mutex_lock(&nc_file_lock); 316 do { 317 if (fgets(stringp, MAXNETCONFIGLINE, nc_file) == NULL) { 318 free(stringp); 319 mutex_lock(&ni_lock); 320 ni.eof = 1; 321 mutex_unlock(&ni_lock); 322 mutex_unlock(&nc_file_lock); 323 return (NULL); 324 } 325 } while (*stringp == '#'); 326 mutex_unlock(&nc_file_lock); 327 328 list = (struct netconfig_list *) malloc(sizeof (struct netconfig_list)); 329 if (list == NULL) { 330 free(stringp); 331 return(NULL); 332 } 333 np = (struct netconfig *) malloc(sizeof (struct netconfig)); 334 if (np == NULL) { 335 free(stringp); 336 free(list); 337 return(NULL); 338 } 339 list->ncp = np; 340 list->next = NULL; 341 list->ncp->nc_lookups = NULL; 342 list->linep = stringp; 343 if (parse_ncp(stringp, list->ncp) == -1) { 344 free(stringp); 345 free(np); 346 free(list); 347 return (NULL); 348 } 349 else { 350 /* 351 * If this is the first entry that's been read, it is the head of 352 * the list. If not, put the entry at the end of the list. 353 * Reposition the current pointer of the handle to the last entry 354 * in the list. 355 */ 356 mutex_lock(&ni_lock); 357 if (ni.head == NULL) { /* first entry */ 358 ni.head = ni.tail = list; 359 } 360 else { 361 ni.tail->next = list; 362 ni.tail = ni.tail->next; 363 } 364 ncp->nc_configs = ni.tail; 365 result = ni.tail->ncp; 366 mutex_unlock(&ni_lock); 367 return(result); 368 } 369 } 370 371 /* 372 * endnetconfig() may be called to "unbind" or "close" the netconfig database 373 * when processing is complete, releasing resources for reuse. endnetconfig() 374 * may not be called before setnetconfig(). endnetconfig() returns 0 on 375 * success and -1 on failure (for example, if setnetconfig() was not called 376 * previously). 377 */ 378 int 379 endnetconfig(void *handlep) 380 { 381 struct netconfig_vars *nc_handlep = (struct netconfig_vars *)handlep; 382 383 struct netconfig_list *q, *p; 384 385 /* 386 * Verify that handle is valid 387 */ 388 if (nc_handlep == NULL || (nc_handlep->valid != NC_VALID && 389 nc_handlep->valid != NC_STORAGE)) { 390 nc_error = NC_NOTINIT; 391 return (-1); 392 } 393 394 /* 395 * Return 0 if anyone still needs it. 396 */ 397 nc_handlep->valid = NC_INVALID; 398 nc_handlep->flag = 0; 399 nc_handlep->nc_configs = NULL; 400 mutex_lock(&ni_lock); 401 if (--ni.ref > 0) { 402 mutex_unlock(&ni_lock); 403 free(nc_handlep); 404 return(0); 405 } 406 407 /* 408 * No one needs these entries anymore, then frees them. 409 * Make sure all info in netconfig_info structure has been reinitialized. 410 */ 411 q = ni.head; 412 ni.eof = ni.ref = 0; 413 ni.head = NULL; 414 ni.tail = NULL; 415 mutex_unlock(&ni_lock); 416 417 while (q != NULL) { 418 p = q->next; 419 free(q->ncp->nc_lookups); 420 free(q->ncp); 421 free(q->linep); 422 free(q); 423 q = p; 424 } 425 free(nc_handlep); 426 427 mutex_lock(&nc_file_lock); 428 fclose(nc_file); 429 nc_file = NULL; 430 mutex_unlock(&nc_file_lock); 431 432 return (0); 433 } 434 435 /* 436 * getnetconfigent(netid) returns a pointer to the struct netconfig structure 437 * corresponding to netid. It returns NULL if netid is invalid (that is, does 438 * not name an entry in the netconfig database). It returns NULL and sets 439 * errno in case of failure (for example, if the netconfig database cannot be 440 * opened). 441 */ 442 443 struct netconfig * 444 getnetconfigent(const char *netid) 445 { 446 FILE *file; /* NETCONFIG db's file pointer */ 447 char *linep; /* holds current netconfig line */ 448 char *stringp; /* temporary string pointer */ 449 struct netconfig *ncp = NULL; /* returned value */ 450 struct netconfig_list *list; /* pointer to cache list */ 451 452 nc_error = NC_NOTFOUND; /* default error. */ 453 if (netid == NULL || strlen(netid) == 0) { 454 return (NULL); 455 } 456 457 /* 458 * Look up table if the entries have already been read and parsed in 459 * getnetconfig(), then copy this entry into a buffer and return it. 460 * If we cannot find the entry in the current list and there are more 461 * entries in the netconfig db that has not been read, we then read the 462 * db and try find the match netid. 463 * If all the netconfig db has been read and placed into the list and 464 * there is no match for the netid, return NULL. 465 */ 466 mutex_lock(&ni_lock); 467 if (ni.head != NULL) { 468 for (list = ni.head; list; list = list->next) { 469 if (strcmp(list->ncp->nc_netid, netid) == 0) { 470 mutex_unlock(&ni_lock); 471 return(dup_ncp(list->ncp)); 472 } 473 } 474 if (ni.eof == 1) { /* that's all the entries */ 475 mutex_unlock(&ni_lock); 476 return(NULL); 477 } 478 } 479 mutex_unlock(&ni_lock); 480 481 482 if ((file = fopen(NETCONFIG, "r")) == NULL) { 483 nc_error = NC_NONETCONFIG; 484 return (NULL); 485 } 486 487 if ((linep = malloc(MAXNETCONFIGLINE)) == NULL) { 488 fclose(file); 489 nc_error = NC_NOMEM; 490 return (NULL); 491 } 492 do { 493 ptrdiff_t len; 494 char *tmpp; /* tmp string pointer */ 495 496 do { 497 if ((stringp = fgets(linep, MAXNETCONFIGLINE, file)) == NULL) { 498 break; 499 } 500 } while (*stringp == '#'); 501 if (stringp == NULL) { /* eof */ 502 break; 503 } 504 if ((tmpp = strpbrk(stringp, "\t ")) == NULL) { /* can't parse file */ 505 nc_error = NC_BADFILE; 506 break; 507 } 508 if (strlen(netid) == (size_t) (len = tmpp - stringp) && /* a match */ 509 strncmp(stringp, netid, (size_t)len) == 0) { 510 if ((ncp = (struct netconfig *) 511 malloc(sizeof (struct netconfig))) == NULL) { 512 break; 513 } 514 ncp->nc_lookups = NULL; 515 if (parse_ncp(linep, ncp) == -1) { 516 free(ncp); 517 ncp = NULL; 518 } 519 break; 520 } 521 } while (stringp != NULL); 522 if (ncp == NULL) { 523 free(linep); 524 } 525 fclose(file); 526 return(ncp); 527 } 528 529 /* 530 * freenetconfigent(netconfigp) frees the netconfig structure pointed to by 531 * netconfigp (previously returned by getnetconfigent()). 532 */ 533 534 void 535 freenetconfigent(struct netconfig *netconfigp) 536 { 537 if (netconfigp != NULL) { 538 free(netconfigp->nc_netid); /* holds all netconfigp's strings */ 539 free(netconfigp->nc_lookups); 540 free(netconfigp); 541 } 542 return; 543 } 544 545 /* 546 * Parse line and stuff it in a struct netconfig 547 * Typical line might look like: 548 * udp tpi_cots vb inet udp /dev/udp /usr/lib/ip.so,/usr/local/ip.so 549 * 550 * We return -1 if any of the tokens don't parse, or malloc fails. 551 * 552 * Note that we modify stringp (putting NULLs after tokens) and 553 * we set the ncp's string field pointers to point to these tokens within 554 * stringp. 555 * 556 * stringp - string to parse 557 * ncp - where to put results 558 */ 559 560 static int 561 parse_ncp(char *stringp, struct netconfig *ncp) 562 { 563 char *tokenp; /* for processing tokens */ 564 char *lasts; 565 char **nc_lookups; 566 567 nc_error = NC_BADFILE; /* nearly anything that breaks is for this reason */ 568 stringp[strlen(stringp)-1] = '\0'; /* get rid of newline */ 569 /* netid */ 570 if ((ncp->nc_netid = strtok_r(stringp, "\t ", &lasts)) == NULL) { 571 return (-1); 572 } 573 574 /* semantics */ 575 if ((tokenp = strtok_r(NULL, "\t ", &lasts)) == NULL) { 576 return (-1); 577 } 578 if (strcmp(tokenp, NC_TPI_COTS_ORD_S) == 0) 579 ncp->nc_semantics = NC_TPI_COTS_ORD; 580 else if (strcmp(tokenp, NC_TPI_COTS_S) == 0) 581 ncp->nc_semantics = NC_TPI_COTS; 582 else if (strcmp(tokenp, NC_TPI_CLTS_S) == 0) 583 ncp->nc_semantics = NC_TPI_CLTS; 584 else if (strcmp(tokenp, NC_TPI_RAW_S) == 0) 585 ncp->nc_semantics = NC_TPI_RAW; 586 else 587 return (-1); 588 589 /* flags */ 590 if ((tokenp = strtok_r(NULL, "\t ", &lasts)) == NULL) { 591 return (-1); 592 } 593 for (ncp->nc_flag = NC_NOFLAG; *tokenp != '\0'; 594 tokenp++) { 595 switch (*tokenp) { 596 case NC_NOFLAG_C: 597 break; 598 case NC_VISIBLE_C: 599 ncp->nc_flag |= NC_VISIBLE; 600 break; 601 case NC_BROADCAST_C: 602 ncp->nc_flag |= NC_BROADCAST; 603 break; 604 default: 605 return (-1); 606 } 607 } 608 /* protocol family */ 609 if ((ncp->nc_protofmly = strtok_r(NULL, "\t ", &lasts)) == NULL) { 610 return (-1); 611 } 612 /* protocol name */ 613 if ((ncp->nc_proto = strtok_r(NULL, "\t ", &lasts)) == NULL) { 614 return (-1); 615 } 616 /* network device */ 617 if ((ncp->nc_device = strtok_r(NULL, "\t ", &lasts)) == NULL) { 618 return (-1); 619 } 620 if ((tokenp = strtok_r(NULL, "\t ", &lasts)) == NULL) { 621 return (-1); 622 } 623 if (strcmp(tokenp, NC_NOLOOKUP) == 0) { 624 ncp->nc_nlookups = 0; 625 ncp->nc_lookups = NULL; 626 } else { 627 char *cp; /* tmp string */ 628 629 free(ncp->nc_lookups); /* from last visit */ 630 ncp->nc_lookups = NULL; 631 ncp->nc_nlookups = 0; 632 while ((cp = tokenp) != NULL) { 633 if ((nc_lookups = reallocarray(ncp->nc_lookups, 634 ncp->nc_nlookups + 1, sizeof(*ncp->nc_lookups))) == NULL) { 635 free(ncp->nc_lookups); 636 ncp->nc_lookups = NULL; 637 return (-1); 638 } 639 tokenp = _get_next_token(cp, ','); 640 ncp->nc_lookups = nc_lookups; 641 ncp->nc_lookups[ncp->nc_nlookups++] = cp; 642 } 643 } 644 return (0); 645 } 646 647 648 /* 649 * Returns a string describing the reason for failure. 650 */ 651 char * 652 nc_sperror(void) 653 { 654 const char *message; 655 656 switch(nc_error) { 657 case NC_NONETCONFIG: 658 message = _nc_errors[0]; 659 break; 660 case NC_NOMEM: 661 message = _nc_errors[1]; 662 break; 663 case NC_NOTINIT: 664 message = _nc_errors[2]; 665 break; 666 case NC_BADFILE: 667 message = _nc_errors[3]; 668 break; 669 case NC_NOTFOUND: 670 message = _nc_errors[4]; 671 break; 672 default: 673 message = "Unknown network selection error"; 674 } 675 /* LINTED const castaway */ 676 return ((char *)message); 677 } 678 679 /* 680 * Prints a message onto standard error describing the reason for failure. 681 */ 682 void 683 nc_perror(const char *s) 684 { 685 fprintf(stderr, "%s: %s\n", s, nc_sperror()); 686 } 687 688 /* 689 * Duplicates the matched netconfig buffer. 690 */ 691 static struct netconfig * 692 dup_ncp(struct netconfig *ncp) 693 { 694 struct netconfig *p; 695 char *tmp; 696 u_int i; 697 698 if ((tmp=malloc(MAXNETCONFIGLINE)) == NULL) 699 return(NULL); 700 if ((p=(struct netconfig *)malloc(sizeof(struct netconfig))) == NULL) { 701 free(tmp); 702 return(NULL); 703 } 704 /* 705 * First we dup all the data from matched netconfig buffer. Then we 706 * adjust some of the member pointer to a pre-allocated buffer where 707 * contains part of the data. 708 * To follow the convention used in parse_ncp(), we store all the 709 * necessary information in the pre-allocated buffer and let each 710 * of the netconfig char pointer member point to the right address 711 * in the buffer. 712 */ 713 *p = *ncp; 714 p->nc_netid = (char *)strcpy(tmp,ncp->nc_netid); 715 tmp = strchr(tmp, '\0') + 1; 716 p->nc_protofmly = (char *)strcpy(tmp,ncp->nc_protofmly); 717 tmp = strchr(tmp, '\0') + 1; 718 p->nc_proto = (char *)strcpy(tmp,ncp->nc_proto); 719 tmp = strchr(tmp, '\0') + 1; 720 p->nc_device = (char *)strcpy(tmp,ncp->nc_device); 721 p->nc_lookups = (char **)malloc((size_t)(p->nc_nlookups+1) * sizeof(char *)); 722 if (p->nc_lookups == NULL) { 723 free(p->nc_netid); 724 free(p); 725 return(NULL); 726 } 727 for (i=0; i < p->nc_nlookups; i++) { 728 tmp = strchr(tmp, '\0') + 1; 729 p->nc_lookups[i] = (char *)strcpy(tmp,ncp->nc_lookups[i]); 730 } 731 return(p); 732 } 733