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
check_name(nss_XbyY_args_t * argp,const char * line,int linelen)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
_nss_files_XY_printer(be,args,filter,check)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
getent(be,a)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
getbyname(be,a)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 *
_nss_files_printers_constr(dummy1,dummy2,dummy3)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