1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate * 26*0Sstevel@tonic-gate * files/gethostent.c -- "files" backend for nsswitch "hosts" database 27*0Sstevel@tonic-gate */ 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate #include <netdb.h> 32*0Sstevel@tonic-gate #include "files_common.h" 33*0Sstevel@tonic-gate #include <string.h> 34*0Sstevel@tonic-gate #include <strings.h> 35*0Sstevel@tonic-gate #include <stddef.h> 36*0Sstevel@tonic-gate #include <stdlib.h> 37*0Sstevel@tonic-gate #include <sys/types.h> 38*0Sstevel@tonic-gate #include <sys/socket.h> 39*0Sstevel@tonic-gate #include <netinet/in.h> 40*0Sstevel@tonic-gate #include <arpa/nameser.h> 41*0Sstevel@tonic-gate #include <ctype.h> 42*0Sstevel@tonic-gate 43*0Sstevel@tonic-gate static int check_name(); 44*0Sstevel@tonic-gate static char *do_aliases(); 45*0Sstevel@tonic-gate static char *strcasestr(); 46*0Sstevel@tonic-gate nss_status_t __nss_files_XY_hostbyname(); 47*0Sstevel@tonic-gate int __nss_files_2herrno(); 48*0Sstevel@tonic-gate 49*0Sstevel@tonic-gate static int 50*0Sstevel@tonic-gate check_name(host, args) 51*0Sstevel@tonic-gate struct hostent *host; 52*0Sstevel@tonic-gate nss_XbyY_args_t *args; 53*0Sstevel@tonic-gate { 54*0Sstevel@tonic-gate const char *name = args->key.name; 55*0Sstevel@tonic-gate char **aliasp; 56*0Sstevel@tonic-gate 57*0Sstevel@tonic-gate if (!host->h_name) 58*0Sstevel@tonic-gate return (0); 59*0Sstevel@tonic-gate if (strcasecmp(host->h_name, name) == 0) { 60*0Sstevel@tonic-gate return (1); 61*0Sstevel@tonic-gate } 62*0Sstevel@tonic-gate for (aliasp = host->h_aliases; *aliasp != 0; aliasp++) { 63*0Sstevel@tonic-gate if (strcasecmp(*aliasp, name) == 0) { 64*0Sstevel@tonic-gate return (1); 65*0Sstevel@tonic-gate } 66*0Sstevel@tonic-gate } 67*0Sstevel@tonic-gate return (0); 68*0Sstevel@tonic-gate } 69*0Sstevel@tonic-gate 70*0Sstevel@tonic-gate static nss_status_t 71*0Sstevel@tonic-gate getbyname(be, a) 72*0Sstevel@tonic-gate files_backend_ptr_t be; 73*0Sstevel@tonic-gate void *a; 74*0Sstevel@tonic-gate { 75*0Sstevel@tonic-gate nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a; 76*0Sstevel@tonic-gate nss_status_t res; 77*0Sstevel@tonic-gate 78*0Sstevel@tonic-gate res = __nss_files_XY_hostbyname(be, argp, argp->key.name, AF_INET); 79*0Sstevel@tonic-gate if (res != NSS_SUCCESS) 80*0Sstevel@tonic-gate argp->h_errno = __nss_files_2herrno(res); 81*0Sstevel@tonic-gate return (res); 82*0Sstevel@tonic-gate } 83*0Sstevel@tonic-gate 84*0Sstevel@tonic-gate 85*0Sstevel@tonic-gate int 86*0Sstevel@tonic-gate __nss_files_check_addr(argp) 87*0Sstevel@tonic-gate nss_XbyY_args_t *argp; 88*0Sstevel@tonic-gate { 89*0Sstevel@tonic-gate struct hostent *host = (struct hostent *)argp->returnval; 90*0Sstevel@tonic-gate 91*0Sstevel@tonic-gate /* 92*0Sstevel@tonic-gate * We know that /etc/hosts can only store one address per host, so... 93*0Sstevel@tonic-gate */ 94*0Sstevel@tonic-gate return (host->h_length == argp->key.hostaddr.len && 95*0Sstevel@tonic-gate host->h_addrtype == argp->key.hostaddr.type && 96*0Sstevel@tonic-gate memcmp(host->h_addr_list[0], argp->key.hostaddr.addr, 97*0Sstevel@tonic-gate argp->key.hostaddr.len) == 0); 98*0Sstevel@tonic-gate } 99*0Sstevel@tonic-gate 100*0Sstevel@tonic-gate 101*0Sstevel@tonic-gate static nss_status_t 102*0Sstevel@tonic-gate getbyaddr(be, a) 103*0Sstevel@tonic-gate files_backend_ptr_t be; 104*0Sstevel@tonic-gate void *a; 105*0Sstevel@tonic-gate { 106*0Sstevel@tonic-gate nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a; 107*0Sstevel@tonic-gate nss_status_t res; 108*0Sstevel@tonic-gate 109*0Sstevel@tonic-gate res = _nss_files_XY_all(be, argp, 1, 0, __nss_files_check_addr); 110*0Sstevel@tonic-gate if (res != NSS_SUCCESS) 111*0Sstevel@tonic-gate argp->h_errno = __nss_files_2herrno(res); 112*0Sstevel@tonic-gate return (res); 113*0Sstevel@tonic-gate } 114*0Sstevel@tonic-gate 115*0Sstevel@tonic-gate 116*0Sstevel@tonic-gate static files_backend_op_t host_ops[] = { 117*0Sstevel@tonic-gate _nss_files_destr, 118*0Sstevel@tonic-gate _nss_files_endent, 119*0Sstevel@tonic-gate _nss_files_setent, 120*0Sstevel@tonic-gate _nss_files_getent_netdb, 121*0Sstevel@tonic-gate getbyname, 122*0Sstevel@tonic-gate getbyaddr, 123*0Sstevel@tonic-gate }; 124*0Sstevel@tonic-gate 125*0Sstevel@tonic-gate /*ARGSUSED*/ 126*0Sstevel@tonic-gate nss_backend_t * 127*0Sstevel@tonic-gate _nss_files_hosts_constr(dummy1, dummy2, dummy3) 128*0Sstevel@tonic-gate const char *dummy1, *dummy2, *dummy3; 129*0Sstevel@tonic-gate { 130*0Sstevel@tonic-gate return (_nss_files_constr(host_ops, 131*0Sstevel@tonic-gate sizeof (host_ops) / sizeof (host_ops[0]), 132*0Sstevel@tonic-gate _PATH_HOSTS, 133*0Sstevel@tonic-gate NSS_LINELEN_HOSTS, 134*0Sstevel@tonic-gate NULL)); 135*0Sstevel@tonic-gate } 136*0Sstevel@tonic-gate 137*0Sstevel@tonic-gate 138*0Sstevel@tonic-gate /* 139*0Sstevel@tonic-gate * XXX - this duplicates code from files_common.c because we need to keep 140*0Sstevel@tonic-gate * going after we've found a match to satisfy the multihomed host case. 141*0Sstevel@tonic-gate */ 142*0Sstevel@tonic-gate nss_status_t 143*0Sstevel@tonic-gate __nss_files_XY_hostbyname(be, args, filter, type) 144*0Sstevel@tonic-gate files_backend_ptr_t be; 145*0Sstevel@tonic-gate nss_XbyY_args_t *args; 146*0Sstevel@tonic-gate const char *filter; /* hint for name string */ 147*0Sstevel@tonic-gate int type; 148*0Sstevel@tonic-gate { 149*0Sstevel@tonic-gate nss_status_t res; 150*0Sstevel@tonic-gate int parsestat; 151*0Sstevel@tonic-gate char *first; 152*0Sstevel@tonic-gate char *last; 153*0Sstevel@tonic-gate int i, nhosts = 0; 154*0Sstevel@tonic-gate struct hostent he, *hp, *thp; 155*0Sstevel@tonic-gate in_addr_t taddr[MAXADDRS]; 156*0Sstevel@tonic-gate struct in6_addr taddr6[MAXADDRS]; 157*0Sstevel@tonic-gate char *abuf = 0; /* alias buffer */ 158*0Sstevel@tonic-gate char *abuf_start = 0, *abuf_end; 159*0Sstevel@tonic-gate int (*func)(); 160*0Sstevel@tonic-gate 161*0Sstevel@tonic-gate if (be->buf == 0 && 162*0Sstevel@tonic-gate (be->buf = malloc(be->minbuf)) == 0) { 163*0Sstevel@tonic-gate return (NSS_UNAVAIL); 164*0Sstevel@tonic-gate } 165*0Sstevel@tonic-gate 166*0Sstevel@tonic-gate if (be->f == 0) { 167*0Sstevel@tonic-gate if ((res = _nss_files_setent(be, 0)) != NSS_SUCCESS) 168*0Sstevel@tonic-gate return (res); 169*0Sstevel@tonic-gate } 170*0Sstevel@tonic-gate 171*0Sstevel@tonic-gate res = NSS_NOTFOUND; 172*0Sstevel@tonic-gate args->erange = 0; 173*0Sstevel@tonic-gate args->returnval = (char *)0; 174*0Sstevel@tonic-gate hp = thp = (struct hostent *)args->buf.result; 175*0Sstevel@tonic-gate 176*0Sstevel@tonic-gate for (;;) { 177*0Sstevel@tonic-gate char *instr = be->buf; 178*0Sstevel@tonic-gate int linelen; 179*0Sstevel@tonic-gate 180*0Sstevel@tonic-gate if ((linelen = _nss_files_read_line(be->f, 181*0Sstevel@tonic-gate instr, be->minbuf)) < 0) { 182*0Sstevel@tonic-gate break; /* EOF */ 183*0Sstevel@tonic-gate } 184*0Sstevel@tonic-gate 185*0Sstevel@tonic-gate /* 186*0Sstevel@tonic-gate * This check avoids a malloc()/free() for the common 187*0Sstevel@tonic-gate * case. Also, if we're trying to match an alias and an 188*0Sstevel@tonic-gate * already matched entry doesn't share a canonical name 189*0Sstevel@tonic-gate * with the current one, bail. 190*0Sstevel@tonic-gate */ 191*0Sstevel@tonic-gate if (nhosts == 0 && strcasestr(instr, filter) == 0) { 192*0Sstevel@tonic-gate continue; 193*0Sstevel@tonic-gate } 194*0Sstevel@tonic-gate 195*0Sstevel@tonic-gate if ((last = strchr(instr, '#')) == 0) 196*0Sstevel@tonic-gate last = instr + linelen; 197*0Sstevel@tonic-gate *last-- = '\0'; 198*0Sstevel@tonic-gate for (first = instr; isspace(*first); first++) 199*0Sstevel@tonic-gate ; 200*0Sstevel@tonic-gate /* Ignore blank and comment lines */ 201*0Sstevel@tonic-gate if (*first == '\0') 202*0Sstevel@tonic-gate continue; 203*0Sstevel@tonic-gate 204*0Sstevel@tonic-gate while (isspace(*last)) 205*0Sstevel@tonic-gate --last; 206*0Sstevel@tonic-gate linelen = last - first + 1; 207*0Sstevel@tonic-gate if (first != instr) 208*0Sstevel@tonic-gate instr = first; 209*0Sstevel@tonic-gate 210*0Sstevel@tonic-gate if (nhosts && strcasestr(instr, hp->h_name) == 0) { 211*0Sstevel@tonic-gate break; 212*0Sstevel@tonic-gate } 213*0Sstevel@tonic-gate /* 214*0Sstevel@tonic-gate * If we've already matched once and have a possible match 215*0Sstevel@tonic-gate * on this line, copy the aliases where they're safe from 216*0Sstevel@tonic-gate * being overwritten when we look at the next entry. They're 217*0Sstevel@tonic-gate * saved as a string of blank separated names for the alias 218*0Sstevel@tonic-gate * parser. On errors, we return failure whether or not we 219*0Sstevel@tonic-gate * have already obtained a valid address. 220*0Sstevel@tonic-gate */ 221*0Sstevel@tonic-gate if (nhosts == 1 && !abuf) { 222*0Sstevel@tonic-gate abuf = malloc(args->buf.buflen); 223*0Sstevel@tonic-gate if (abuf == NULL) { 224*0Sstevel@tonic-gate res = NSS_UNAVAIL; 225*0Sstevel@tonic-gate break; 226*0Sstevel@tonic-gate } 227*0Sstevel@tonic-gate abuf_start = &abuf[0]; 228*0Sstevel@tonic-gate abuf_end = abuf_start + args->buf.buflen; 229*0Sstevel@tonic-gate if (abuf + strlen(hp->h_name) + 1 > abuf_end) { 230*0Sstevel@tonic-gate free(abuf_start); 231*0Sstevel@tonic-gate abuf = NULL; 232*0Sstevel@tonic-gate args->erange = 1; 233*0Sstevel@tonic-gate res = NSS_NOTFOUND; 234*0Sstevel@tonic-gate break; 235*0Sstevel@tonic-gate } 236*0Sstevel@tonic-gate (void) strcpy(abuf, hp->h_name); 237*0Sstevel@tonic-gate abuf += strlen(hp->h_name); 238*0Sstevel@tonic-gate *abuf++ = ' '; 239*0Sstevel@tonic-gate abuf = do_aliases(hp, abuf, abuf_start, abuf_end); 240*0Sstevel@tonic-gate if (abuf == NULL) { 241*0Sstevel@tonic-gate args->erange = 1; 242*0Sstevel@tonic-gate res = NSS_NOTFOUND; 243*0Sstevel@tonic-gate break; 244*0Sstevel@tonic-gate } 245*0Sstevel@tonic-gate } 246*0Sstevel@tonic-gate func = args->str2ent; 247*0Sstevel@tonic-gate parsestat = (*func)(instr, linelen, thp, 248*0Sstevel@tonic-gate args->buf.buffer, args->buf.buflen); 249*0Sstevel@tonic-gate 250*0Sstevel@tonic-gate if (parsestat != NSS_STR_PARSE_SUCCESS) { 251*0Sstevel@tonic-gate if (parsestat == NSS_STR_PARSE_ERANGE) 252*0Sstevel@tonic-gate args->erange = 1; 253*0Sstevel@tonic-gate continue; 254*0Sstevel@tonic-gate } 255*0Sstevel@tonic-gate 256*0Sstevel@tonic-gate /* 257*0Sstevel@tonic-gate * Still need to check, strcasestr() above is just a hint. 258*0Sstevel@tonic-gate */ 259*0Sstevel@tonic-gate 260*0Sstevel@tonic-gate if (type == thp->h_addrtype) 261*0Sstevel@tonic-gate if (check_name(thp, args)) { 262*0Sstevel@tonic-gate if (type == AF_INET) 263*0Sstevel@tonic-gate taddr[nhosts++] = 264*0Sstevel@tonic-gate (*(in_addr_t *)thp->h_addr_list[0]); 265*0Sstevel@tonic-gate else { 266*0Sstevel@tonic-gate memcpy(&taddr6[nhosts++], thp->h_addr_list[0], 267*0Sstevel@tonic-gate sizeof (struct in6_addr)); 268*0Sstevel@tonic-gate } 269*0Sstevel@tonic-gate 270*0Sstevel@tonic-gate 271*0Sstevel@tonic-gate if (nhosts == 1) { 272*0Sstevel@tonic-gate res = NSS_SUCCESS; 273*0Sstevel@tonic-gate args->returnval = args->buf.result; 274*0Sstevel@tonic-gate thp = &he; /* switch to tmp hostent */ 275*0Sstevel@tonic-gate continue; 276*0Sstevel@tonic-gate } 277*0Sstevel@tonic-gate if (nhosts >= MAXADDRS) 278*0Sstevel@tonic-gate break; 279*0Sstevel@tonic-gate abuf = do_aliases(thp, abuf, abuf_start, abuf_end); 280*0Sstevel@tonic-gate if (abuf == NULL) { 281*0Sstevel@tonic-gate args->erange = 1; 282*0Sstevel@tonic-gate res = NSS_NOTFOUND; 283*0Sstevel@tonic-gate break; 284*0Sstevel@tonic-gate } 285*0Sstevel@tonic-gate } else if (abuf && 286*0Sstevel@tonic-gate strcasecmp(hp->h_name, thp->h_name) == 0) { 287*0Sstevel@tonic-gate /* 288*0Sstevel@tonic-gate * This line didn't have the requested name but 289*0Sstevel@tonic-gate * is part of the same multihomed host (i.e. it 290*0Sstevel@tonic-gate * has the same canonical name as the previous 291*0Sstevel@tonic-gate * line), so march on... 292*0Sstevel@tonic-gate */ 293*0Sstevel@tonic-gate continue; 294*0Sstevel@tonic-gate } else if (nhosts) { 295*0Sstevel@tonic-gate break; 296*0Sstevel@tonic-gate } 297*0Sstevel@tonic-gate } 298*0Sstevel@tonic-gate 299*0Sstevel@tonic-gate if (abuf) { 300*0Sstevel@tonic-gate struct in_addr *addrp; 301*0Sstevel@tonic-gate struct in6_addr *addrp6; 302*0Sstevel@tonic-gate 303*0Sstevel@tonic-gate if (type == AF_INET) { 304*0Sstevel@tonic-gate addrp = (struct in_addr *)(ROUND_DOWN(args->buf.buffer + 305*0Sstevel@tonic-gate args->buf.buflen, sizeof (*addrp))); 306*0Sstevel@tonic-gate hp->h_addr_list = (char **)(ROUND_DOWN(addrp - 307*0Sstevel@tonic-gate ((nhosts + 1) * sizeof (char *) + 308*0Sstevel@tonic-gate (nhosts * sizeof (*addrp))), sizeof (char *))); 309*0Sstevel@tonic-gate for (i = 0, --addrp; i < nhosts; i++, --addrp) { 310*0Sstevel@tonic-gate (*(in_addr_t *)addrp) = taddr[i]; 311*0Sstevel@tonic-gate hp->h_addr_list[i] = (char *)addrp; 312*0Sstevel@tonic-gate } 313*0Sstevel@tonic-gate } else { 314*0Sstevel@tonic-gate addrp6 = (struct in6_addr *) 315*0Sstevel@tonic-gate (ROUND_DOWN(args->buf.buffer + args->buf.buflen, 316*0Sstevel@tonic-gate sizeof (*addrp6))); 317*0Sstevel@tonic-gate hp->h_addr_list = (char **)(ROUND_DOWN(addrp6 - 318*0Sstevel@tonic-gate ((nhosts + 1) * sizeof (char *) + 319*0Sstevel@tonic-gate (nhosts * sizeof (*addrp6))), sizeof (char *))); 320*0Sstevel@tonic-gate for (i = 0, --addrp6; i < nhosts; i++, --addrp6) { 321*0Sstevel@tonic-gate memcpy(addrp6, &taddr6[i], 322*0Sstevel@tonic-gate sizeof (struct in6_addr)); 323*0Sstevel@tonic-gate hp->h_addr_list[i] = (char *)addrp6; 324*0Sstevel@tonic-gate } 325*0Sstevel@tonic-gate } 326*0Sstevel@tonic-gate 327*0Sstevel@tonic-gate hp->h_addr_list[nhosts] = 0; 328*0Sstevel@tonic-gate hp->h_aliases = _nss_netdb_aliases(abuf_start, 329*0Sstevel@tonic-gate abuf - abuf_start, args->buf.buffer, 330*0Sstevel@tonic-gate (char *)hp->h_addr_list - args->buf.buffer); 331*0Sstevel@tonic-gate if (hp->h_aliases == 0) { 332*0Sstevel@tonic-gate args->erange = 1; 333*0Sstevel@tonic-gate res = NSS_STR_PARSE_ERANGE; 334*0Sstevel@tonic-gate } else { 335*0Sstevel@tonic-gate hp->h_name = hp->h_aliases[0]; 336*0Sstevel@tonic-gate hp->h_aliases++; 337*0Sstevel@tonic-gate } 338*0Sstevel@tonic-gate free(abuf_start); 339*0Sstevel@tonic-gate } 340*0Sstevel@tonic-gate 341*0Sstevel@tonic-gate /* 342*0Sstevel@tonic-gate * stayopen is set to 0 by default in order to close the opened 343*0Sstevel@tonic-gate * file. Some applications may break if it is set to 1. 344*0Sstevel@tonic-gate */ 345*0Sstevel@tonic-gate if (!args->stayopen) 346*0Sstevel@tonic-gate (void) _nss_files_endent(be, 0); 347*0Sstevel@tonic-gate 348*0Sstevel@tonic-gate return (res); 349*0Sstevel@tonic-gate } 350*0Sstevel@tonic-gate 351*0Sstevel@tonic-gate /* 352*0Sstevel@tonic-gate * A case-insensitive version of strstr(). 353*0Sstevel@tonic-gate */ 354*0Sstevel@tonic-gate static char * 355*0Sstevel@tonic-gate strcasestr(as1, as2) 356*0Sstevel@tonic-gate char *as1; 357*0Sstevel@tonic-gate char *as2; 358*0Sstevel@tonic-gate { 359*0Sstevel@tonic-gate int c2; 360*0Sstevel@tonic-gate register char *tptr; 361*0Sstevel@tonic-gate register char *s1, *s2; 362*0Sstevel@tonic-gate 363*0Sstevel@tonic-gate s1 = as1; 364*0Sstevel@tonic-gate s2 = as2; 365*0Sstevel@tonic-gate 366*0Sstevel@tonic-gate if (s2 == NULL || *s2 == '\0') 367*0Sstevel@tonic-gate return (0); 368*0Sstevel@tonic-gate 369*0Sstevel@tonic-gate while (*s1) { 370*0Sstevel@tonic-gate if (tolower(*s1++) == tolower(c2 = *s2)) { 371*0Sstevel@tonic-gate tptr = s1; 372*0Sstevel@tonic-gate while ((tolower(c2 = *++s2) == 373*0Sstevel@tonic-gate tolower(*s1++)) && c2 != 0) 374*0Sstevel@tonic-gate ; 375*0Sstevel@tonic-gate if (c2 == 0) 376*0Sstevel@tonic-gate return ((char *)tptr - 1); 377*0Sstevel@tonic-gate s1 = tptr; 378*0Sstevel@tonic-gate s2 = as2; 379*0Sstevel@tonic-gate } 380*0Sstevel@tonic-gate } 381*0Sstevel@tonic-gate return (0); 382*0Sstevel@tonic-gate } 383*0Sstevel@tonic-gate 384*0Sstevel@tonic-gate 385*0Sstevel@tonic-gate static char * 386*0Sstevel@tonic-gate do_aliases(hp, abuf, start, end) 387*0Sstevel@tonic-gate struct hostent *hp; 388*0Sstevel@tonic-gate char *abuf; 389*0Sstevel@tonic-gate char *start; 390*0Sstevel@tonic-gate char *end; 391*0Sstevel@tonic-gate { 392*0Sstevel@tonic-gate char **cp; 393*0Sstevel@tonic-gate 394*0Sstevel@tonic-gate for (cp = hp->h_aliases; cp && *cp && **cp; cp++) { 395*0Sstevel@tonic-gate size_t len; 396*0Sstevel@tonic-gate 397*0Sstevel@tonic-gate len = strlen(*cp); 398*0Sstevel@tonic-gate if (abuf+len+1 >= end) { 399*0Sstevel@tonic-gate free(start); 400*0Sstevel@tonic-gate return ((char *)0); 401*0Sstevel@tonic-gate } 402*0Sstevel@tonic-gate (void) strcpy(abuf, *cp); 403*0Sstevel@tonic-gate abuf += len; 404*0Sstevel@tonic-gate *abuf++ = ' '; 405*0Sstevel@tonic-gate } 406*0Sstevel@tonic-gate *abuf = '\0'; 407*0Sstevel@tonic-gate 408*0Sstevel@tonic-gate return (abuf); 409*0Sstevel@tonic-gate } 410*0Sstevel@tonic-gate 411*0Sstevel@tonic-gate 412*0Sstevel@tonic-gate /* 413*0Sstevel@tonic-gate * This is a copy of a routine in libnsl/nss/netdir_inet.c. It is 414*0Sstevel@tonic-gate * here because /etc/lib/nss_files.so.1 cannot call routines 415*0Sstevel@tonic-gate * in libnsl. Care should be taken to keep the two copies in sync. 416*0Sstevel@tonic-gate */ 417*0Sstevel@tonic-gate int 418*0Sstevel@tonic-gate __nss_files_2herrno(nsstat) 419*0Sstevel@tonic-gate nss_status_t nsstat; 420*0Sstevel@tonic-gate { 421*0Sstevel@tonic-gate switch (nsstat) { 422*0Sstevel@tonic-gate case NSS_SUCCESS: 423*0Sstevel@tonic-gate /* no macro-defined success code for h_errno */ 424*0Sstevel@tonic-gate return (0); 425*0Sstevel@tonic-gate case NSS_NOTFOUND: 426*0Sstevel@tonic-gate return (HOST_NOT_FOUND); 427*0Sstevel@tonic-gate case NSS_TRYAGAIN: 428*0Sstevel@tonic-gate return (TRY_AGAIN); 429*0Sstevel@tonic-gate case NSS_UNAVAIL: 430*0Sstevel@tonic-gate return (NO_RECOVERY); 431*0Sstevel@tonic-gate } 432*0Sstevel@tonic-gate /* anything else */ 433*0Sstevel@tonic-gate return (NO_RECOVERY); 434*0Sstevel@tonic-gate } 435