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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * files/printers_getbyname.c -- "files" backend for 24 * nsswitch "printers" database. 25 * 26 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 */ 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 static const char *printers = "/etc/printers.conf"; 33 34 #pragma weak _nss_files__printers_constr = _nss_files_printers_constr 35 36 #include "files_common.h" 37 #include <stdlib.h> 38 #include <strings.h> 39 40 static nss_status_t _nss_files_XY_printers(files_backend_ptr_t, 41 nss_XbyY_args_t *, const char *); 42 43 44 static nss_status_t 45 getent(be, a) 46 files_backend_ptr_t be; 47 void *a; 48 { 49 nss_XbyY_args_t *args = (nss_XbyY_args_t *)a; 50 51 return (_nss_files_XY_all(be, args, 1, 0, 0)); 52 } 53 54 55 static nss_status_t 56 getbyname(be, a) 57 files_backend_ptr_t be; 58 void *a; 59 { 60 nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a; 61 nss_status_t res; 62 63 /* printers_getbyname() has not set/endent; rewind on each call */ 64 if ((res = _nss_files_setent(be, 0)) != NSS_SUCCESS) { 65 return (res); 66 } 67 return (_nss_files_XY_printers(be, argp, argp->key.name)); 68 } 69 70 static files_backend_op_t printers_ops[] = { 71 _nss_files_destr, 72 _nss_files_endent, 73 _nss_files_setent, 74 getent, 75 getbyname 76 }; 77 78 nss_backend_t * 79 _nss_files_printers_constr(dummy1, dummy2, dummy3) 80 const char *dummy1, *dummy2, *dummy3; 81 { 82 return (_nss_files_constr(printers_ops, 83 sizeof (printers_ops) / sizeof (printers_ops[0]), 84 printers, 85 NSS_LINELEN_PRINTERS, 86 NULL)); 87 } 88 89 /* 90 * printers has the hostname as part of the data in the file, but the other 91 * backends don't include it in the data passed to the backend. For this 92 * reason, we process everything here and don't bother calling the backend. 93 */ 94 static nss_status_t 95 _nss_files_XY_printers(be, args, filter) 96 files_backend_ptr_t be; 97 nss_XbyY_args_t *args; 98 const char *filter; 99 /* 100 * filter not useful here since the key 101 * we are looking for is the first "word" 102 * on the line and we can be fast enough. 103 */ 104 { 105 nss_status_t res; 106 int parsestat; 107 int namelen; 108 109 if (be->buf == 0 && 110 (be->buf = (char *)malloc(be->minbuf)) == 0) { 111 (void) _nss_files_endent(be, 0); 112 return (NSS_UNAVAIL); /* really panic, malloc failed */ 113 } 114 115 res = NSS_NOTFOUND; 116 namelen = strlen(args->key.name); 117 118 while (1) { 119 char *instr = be->buf; 120 char *p, *limit; 121 int linelen; 122 int found = 0; 123 124 /* 125 * _nss_files_read_line does process the '\' that are used 126 * in /etc/printers.conf for continuation and gives one long 127 * buffer. 128 * 129 * linelen counts the characters up to but excluding the '\n' 130 */ 131 if ((linelen = _nss_files_read_line(be->f, instr, 132 be->minbuf)) < 0) { 133 /* End of file */ 134 args->returnval = 0; 135 args->erange = 0; 136 break; 137 } 138 p = instr; 139 140 if (*p == '#') /* comment */ 141 continue; 142 143 /* 144 * find the name in the namelist a|b|c...: 145 */ 146 if ((limit = strchr(instr, ':')) == NULL) /* bad line */ 147 continue; 148 while ((p < limit) && (found == 0)) { 149 if ((strncmp(p, args->key.name, namelen) == 0) && 150 ((*(p+namelen) == '|') || (*(p+namelen) == ':'))) 151 found++; 152 else { 153 if ((p = strchr(p, '|')) == NULL) 154 p = limit; 155 else /* skip the '|' */ 156 p++; 157 } 158 } 159 if (found == 0) 160 continue; 161 162 p = instr; 163 164 if (args->buf.buflen <= linelen) { /* not enough buffer */ 165 args->erange = 1; 166 break; 167 } 168 (void) memcpy(args->buf.buffer, p, linelen); 169 args->buf.buffer[linelen] = '\0'; 170 args->returnval = args->buf.result; 171 res = NSS_SUCCESS; 172 break; 173 } 174 (void) _nss_files_endent(be, 0); 175 return (res); 176 } 177