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 * files/printers_getbyname.c -- "files" backend for 23 * nsswitch "printers" database. 24 * 25 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 26 * Use is subject to license terms. 27 */ 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 static const char *printers = "/etc/printers.conf"; 32 33 #pragma weak _nss_files__printers_constr = _nss_files_printers_constr 34 35 #include "files_common.h" 36 #include <stdlib.h> 37 #include <strings.h> 38 39 static nss_status_t _nss_files_XY_printers(files_backend_ptr_t, 40 nss_XbyY_args_t *, const char *); 41 42 43 static nss_status_t 44 getent(be, a) 45 files_backend_ptr_t be; 46 void *a; 47 { 48 nss_XbyY_args_t *args = (nss_XbyY_args_t *)a; 49 50 return (_nss_files_XY_all(be, args, 0, 0, 0)); 51 } 52 53 54 static nss_status_t 55 getbyname(be, a) 56 files_backend_ptr_t be; 57 void *a; 58 { 59 nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a; 60 nss_status_t res; 61 62 /* printers_getbyname() has not set/endent; rewind on each call */ 63 if ((res = _nss_files_setent(be, 0)) != NSS_SUCCESS) { 64 return (res); 65 } 66 return (_nss_files_XY_printers(be, argp, argp->key.name)); 67 } 68 69 static files_backend_op_t printers_ops[] = { 70 _nss_files_destr, 71 _nss_files_endent, 72 _nss_files_setent, 73 getent, 74 getbyname 75 }; 76 77 nss_backend_t * 78 _nss_files_printers_constr(dummy1, dummy2, dummy3) 79 const char *dummy1, *dummy2, *dummy3; 80 { 81 return (_nss_files_constr(printers_ops, 82 sizeof (printers_ops) / sizeof (printers_ops[0]), 83 printers, 84 NSS_LINELEN_PRINTERS, 85 NULL)); 86 } 87 88 /* 89 * printers has the hostname as part of the data in the file, but the other 90 * backends don't include it in the data passed to the backend. For this 91 * reason, we process everything here and don't bother calling the backend. 92 */ 93 static nss_status_t 94 _nss_files_XY_printers(be, args, filter) 95 files_backend_ptr_t be; 96 nss_XbyY_args_t *args; 97 const char *filter; 98 /* 99 * filter not useful here since the key 100 * we are looking for is the first "word" 101 * on the line and we can be fast enough. 102 */ 103 { 104 nss_status_t res; 105 int parsestat; 106 int namelen; 107 108 if (be->buf == 0 && 109 (be->buf = (char *)malloc(be->minbuf)) == 0) { 110 (void) _nss_files_endent(be, 0); 111 return (NSS_UNAVAIL); /* really panic, malloc failed */ 112 } 113 114 res = NSS_NOTFOUND; 115 namelen = strlen(args->key.name); 116 117 while (1) { 118 char *instr = be->buf; 119 char *p, *limit; 120 int linelen; 121 int found = 0; 122 123 /* 124 * _nss_files_read_line does process the '\' that are used 125 * in /etc/printers.conf for continuation and gives one long 126 * buffer. 127 * 128 * linelen counts the characters up to but excluding the '\n' 129 */ 130 if ((linelen = _nss_files_read_line(be->f, instr, 131 be->minbuf)) < 0) { 132 /* End of file */ 133 args->returnval = 0; 134 args->erange = 0; 135 break; 136 } 137 p = instr; 138 139 if (*p == '#') /* comment */ 140 continue; 141 142 /* 143 * find the name in the namelist a|b|c...: 144 */ 145 if ((limit = strchr(instr, ':')) == NULL) /* bad line */ 146 continue; 147 while ((p < limit) && (found == 0)) { 148 if ((strncmp(p, args->key.name, namelen) == 0) && 149 ((*(p+namelen) == '|') || (*(p+namelen) == ':'))) 150 found++; 151 else { 152 if ((p = strchr(p, '|')) == NULL) 153 p = limit; 154 else /* skip the '|' */ 155 p++; 156 } 157 } 158 if (found == 0) 159 continue; 160 161 p = instr; 162 163 if (args->buf.buflen <= linelen) { /* not enough buffer */ 164 args->erange = 1; 165 break; 166 } 167 (void) memcpy(args->buf.buffer, p, linelen); 168 args->buf.buffer[linelen] = '\0'; 169 args->returnval = args->buf.result; 170 res = NSS_SUCCESS; 171 break; 172 } 173 (void) _nss_files_endent(be, 0); 174 return (res); 175 } 176