1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 * 25 * files/bootparams_getbyname.c -- "files" backend for 26 * nsswitch "bootparams" database. 27 */ 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 static const char *bootparams = "/etc/bootparams"; 32 33 #include "files_common.h" 34 #include <stdlib.h> 35 #include <ctype.h> 36 #include <strings.h> 37 38 static nss_status_t _nss_files_XY_bootparams(files_backend_ptr_t, 39 nss_XbyY_args_t *, const char *); 40 41 static nss_status_t 42 getbyname(be, a) 43 files_backend_ptr_t be; 44 void *a; 45 { 46 nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a; 47 nss_status_t res; 48 49 /* bootparams_getbyname() has not set/endent; rewind on each call */ 50 if ((res = _nss_files_setent(be, 0)) != NSS_SUCCESS) { 51 return (res); 52 } 53 return (_nss_files_XY_bootparams(be, argp, argp->key.name)); 54 } 55 56 static files_backend_op_t bootparams_ops[] = { 57 _nss_files_destr, 58 getbyname 59 }; 60 61 /*ARGSUSED*/ 62 nss_backend_t * 63 _nss_files_bootparams_constr(dummy1, dummy2, dummy3) 64 const char *dummy1, *dummy2, *dummy3; 65 { 66 return (_nss_files_constr(bootparams_ops, 67 sizeof (bootparams_ops) / sizeof (bootparams_ops[0]), 68 bootparams, 69 NSS_LINELEN_BOOTPARAMS, 70 NULL)); 71 } 72 73 /* 74 * bootparams has the hostname as part of the data in the file, but the other 75 * backends don't include it in the data passed to the backend. For this 76 * reason, we process everything here and don't bother calling the backend. 77 */ 78 /*ARGSUSED*/ 79 static nss_status_t 80 _nss_files_XY_bootparams(be, args, filter) 81 files_backend_ptr_t be; 82 nss_XbyY_args_t *args; 83 const char *filter; 84 /* 85 * filter not useful here since the key 86 * we are looking for is the first "word" 87 * on the line and we can be fast enough. 88 */ 89 { 90 nss_status_t res; 91 92 if (be->buf == 0 && 93 (be->buf = (char *)malloc(be->minbuf)) == 0) { 94 (void) _nss_files_endent(be, 0); 95 return (NSS_UNAVAIL); /* really panic, malloc failed */ 96 } 97 98 res = NSS_NOTFOUND; 99 100 /*CONSTCOND*/ 101 while (1) { 102 char *instr = be->buf; 103 char *p, *host, *limit; 104 int linelen; 105 106 /* 107 * _nss_files_read_line does process the '\' that are used 108 * in /etc/bootparams for continuation and gives one long 109 * buffer. 110 * 111 * linelen counts the characters up to but excluding the '\n' 112 */ 113 if ((linelen = _nss_files_read_line(be->f, instr, 114 be->minbuf)) < 0) { 115 /* End of file */ 116 args->returnval = 0; 117 args->returnlen = 0; 118 break; 119 } 120 121 /* 122 * we need to strip off the host name before returning it. 123 */ 124 p = instr; 125 limit = p + linelen; 126 127 /* Skip over leading whitespace */ 128 while (p < limit && isspace(*p)) { 129 p++; 130 } 131 host = p; 132 133 /* Skip over the hostname */ 134 while (p < limit && !isspace(*p)) { 135 p++; 136 } 137 *p++ = '\0'; 138 139 if (strcasecmp(args->key.name, host) != 0) { 140 continue; 141 } 142 143 /* Skip over whitespace between name and first datum */ 144 while (p < limit && isspace(*p)) { 145 p++; 146 } 147 if (p >= limit) { 148 /* Syntax error -- no data! Just skip it. */ 149 continue; 150 } 151 152 linelen -= (p - instr); 153 if (args->buf.buflen <= linelen) { /* not enough buffer */ 154 args->erange = 1; 155 break; 156 } 157 (void) memcpy(args->buf.buffer, p, linelen); 158 args->buf.buffer[linelen] = '\0'; 159 args->returnval = args->buf.result; 160 args->returnlen = linelen; 161 res = NSS_SUCCESS; 162 break; 163 } 164 (void) _nss_files_endent(be, 0); 165 return (res); 166 } 167