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 static const char *bootparams = "/etc/bootparams"; 30 31 #include "files_common.h" 32 #include <stdlib.h> 33 #include <ctype.h> 34 #include <strings.h> 35 36 static nss_status_t _nss_files_XY_bootparams(files_backend_ptr_t, 37 nss_XbyY_args_t *, const char *); 38 39 static nss_status_t 40 getbyname(be, a) 41 files_backend_ptr_t be; 42 void *a; 43 { 44 nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a; 45 nss_status_t res; 46 47 /* bootparams_getbyname() has not set/endent; rewind on each call */ 48 if ((res = _nss_files_setent(be, 0)) != NSS_SUCCESS) { 49 return (res); 50 } 51 return (_nss_files_XY_bootparams(be, argp, argp->key.name)); 52 } 53 54 static files_backend_op_t bootparams_ops[] = { 55 _nss_files_destr, 56 getbyname 57 }; 58 59 /*ARGSUSED*/ 60 nss_backend_t * 61 _nss_files_bootparams_constr(dummy1, dummy2, dummy3) 62 const char *dummy1, *dummy2, *dummy3; 63 { 64 return (_nss_files_constr(bootparams_ops, 65 sizeof (bootparams_ops) / sizeof (bootparams_ops[0]), 66 bootparams, 67 NSS_LINELEN_BOOTPARAMS, 68 NULL)); 69 } 70 71 /* 72 * bootparams has the hostname as part of the data in the file, but the other 73 * backends don't include it in the data passed to the backend. For this 74 * reason, we process everything here and don't bother calling the backend. 75 */ 76 /*ARGSUSED*/ 77 static nss_status_t 78 _nss_files_XY_bootparams(be, args, filter) 79 files_backend_ptr_t be; 80 nss_XbyY_args_t *args; 81 const char *filter; 82 /* 83 * filter not useful here since the key 84 * we are looking for is the first "word" 85 * on the line and we can be fast enough. 86 */ 87 { 88 nss_status_t res; 89 90 if (be->buf == 0 && 91 (be->buf = (char *)malloc(be->minbuf)) == 0) { 92 (void) _nss_files_endent(be, 0); 93 return (NSS_UNAVAIL); /* really panic, malloc failed */ 94 } 95 96 res = NSS_NOTFOUND; 97 98 /*CONSTCOND*/ 99 while (1) { 100 char *instr = be->buf; 101 char *p, *host, *limit; 102 int linelen; 103 104 /* 105 * _nss_files_read_line does process the '\' that are used 106 * in /etc/bootparams for continuation and gives one long 107 * buffer. 108 * 109 * linelen counts the characters up to but excluding the '\n' 110 */ 111 if ((linelen = _nss_files_read_line(be->f, instr, 112 be->minbuf)) < 0) { 113 /* End of file */ 114 args->returnval = 0; 115 args->returnlen = 0; 116 break; 117 } 118 119 /* 120 * we need to strip off the host name before returning it. 121 */ 122 p = instr; 123 limit = p + linelen; 124 125 /* Skip over leading whitespace */ 126 while (p < limit && isspace(*p)) { 127 p++; 128 } 129 host = p; 130 131 /* Skip over the hostname */ 132 while (p < limit && !isspace(*p)) { 133 p++; 134 } 135 *p++ = '\0'; 136 137 if (strcasecmp(args->key.name, host) != 0) { 138 continue; 139 } 140 141 /* Skip over whitespace between name and first datum */ 142 while (p < limit && isspace(*p)) { 143 p++; 144 } 145 if (p >= limit) { 146 /* Syntax error -- no data! Just skip it. */ 147 continue; 148 } 149 150 linelen -= (p - instr); 151 if (args->buf.buflen <= linelen) { /* not enough buffer */ 152 args->erange = 1; 153 break; 154 } 155 (void) memcpy(args->buf.buffer, p, linelen); 156 args->buf.buffer[linelen] = '\0'; 157 args->returnval = args->buf.result; 158 args->returnlen = linelen; 159 res = NSS_SUCCESS; 160 break; 161 } 162 (void) _nss_files_endent(be, 0); 163 return (res); 164 } 165