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 static const char *printers = "/etc/printers.conf"; 30 31 #pragma weak _nss_files__printers_constr = _nss_files_printers_constr 32 33 #include "files_common.h" 34 #include <stdlib.h> 35 #include <strings.h> 36 #include <ctype.h> 37 38 static int 39 check_name(nss_XbyY_args_t *argp, const char *line, int linelen) 40 { 41 42 const char *limit, *linep; 43 const char *keyp = argp->key.name; 44 int klen = strlen(keyp); 45 46 linep = line; 47 limit = line + linelen; 48 49 /* 50 * find the name in the namelist a|b|c...: 51 */ 52 while (linep+klen < limit && *linep != '|' && *linep != ':') { 53 if ((strncmp(linep, keyp, klen) == 0) && 54 ((*(linep + klen) == '|') || (*(linep + klen) == ':'))) { 55 return (1); 56 } else { 57 while (linep < limit && *linep != '|' && *linep != ':') 58 linep++; 59 if (linep >= limit || *linep == ':') 60 return (0); 61 if (*linep == '|') 62 linep++; 63 } 64 } 65 return (0); 66 } 67 68 nss_status_t 69 _nss_files_XY_printer(be, args, filter, check) 70 files_backend_ptr_t be; 71 nss_XbyY_args_t *args; 72 const char *filter; /* advisory, to speed up */ 73 /* string search */ 74 files_XY_check_func check; /* NULL means one-shot, for getXXent */ 75 { 76 nss_status_t res; 77 int parsestat; 78 int (*func)(); 79 80 if (filter != NULL && *filter == '\0') 81 return (NSS_NOTFOUND); 82 if (be->buf == 0 && 83 (be->buf = malloc(be->minbuf)) == 0) { 84 return (NSS_UNAVAIL); /* really panic, malloc failed */ 85 } 86 87 if (check != 0 || be->f == 0) { 88 if ((res = _nss_files_setent(be, 0)) != NSS_SUCCESS) { 89 return (res); 90 } 91 } 92 93 res = NSS_NOTFOUND; 94 95 /*CONSTCOND*/ 96 while (1) { 97 char *instr = be->buf; 98 int linelen; 99 100 if ((linelen = _nss_files_read_line(be->f, instr, 101 be->minbuf)) < 0) { 102 /* End of file */ 103 args->returnval = 0; 104 args->returnlen = 0; 105 break; 106 } 107 108 /* begin at the first non-blank character */ 109 while (isspace(*instr)) { 110 instr++; 111 linelen--; 112 } 113 114 /* comment line, skip it. */ 115 if (*instr == '#') 116 continue; 117 118 /* blank line, skip it */ 119 if ((*instr == '\n') || (*instr == '\0')) 120 continue; 121 122 if (filter != 0 && strstr(instr, filter) == 0) { 123 /* 124 * Optimization: if the entry doesn't contain the 125 * filter string then it can't be the entry we want, 126 * so don't bother looking more closely at it. 127 */ 128 continue; 129 } 130 131 args->returnval = 0; 132 args->returnlen = 0; 133 134 if (check != NULL && (*check)(args, instr, linelen) == 0) 135 continue; 136 137 func = args->str2ent; 138 parsestat = (*func)(instr, linelen, args->buf.result, 139 args->buf.buffer, args->buf.buflen); 140 141 if (parsestat == NSS_STR_PARSE_SUCCESS) { 142 args->returnval = (args->buf.result != NULL)? 143 args->buf.result : args->buf.buffer; 144 args->returnlen = linelen; 145 res = NSS_SUCCESS; 146 break; 147 } else if (parsestat == NSS_STR_PARSE_ERANGE) { 148 args->erange = 1; 149 break; 150 } else if (parsestat == NSS_STR_PARSE_PARSE) 151 continue; 152 } 153 154 /* 155 * stayopen is set to 0 by default in order to close the opened 156 * file. Some applications may break if it is set to 1. 157 */ 158 if (check != 0 && !args->stayopen) { 159 (void) _nss_files_endent(be, 0); 160 } 161 162 return (res); 163 } 164 165 static nss_status_t 166 getent(be, a) 167 files_backend_ptr_t be; 168 void *a; 169 { 170 nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a; 171 172 return (_nss_files_XY_printer(be, argp, (const char *)0, 173 (files_XY_check_func)0)); 174 } 175 176 static nss_status_t 177 getbyname(be, a) 178 files_backend_ptr_t be; 179 void *a; 180 { 181 nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a; 182 183 return (_nss_files_XY_printer(be, argp, argp->key.name, check_name)); 184 } 185 186 static files_backend_op_t printers_ops[] = { 187 _nss_files_destr, 188 _nss_files_endent, 189 _nss_files_setent, 190 getent, 191 getbyname 192 }; 193 194 /*ARGSUSED*/ 195 nss_backend_t * 196 _nss_files_printers_constr(dummy1, dummy2, dummy3) 197 const char *dummy1, *dummy2, *dummy3; 198 { 199 return (_nss_files_constr(printers_ops, 200 sizeof (printers_ops) / sizeof (printers_ops[0]), 201 printers, 202 NSS_LINELEN_PRINTERS, 203 NULL)); 204 } 205