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 #include <ctype.h>
39
40 static int
check_name(nss_XbyY_args_t * argp,const char * line,int linelen)41 check_name(nss_XbyY_args_t *argp, const char *line, int linelen)
42 {
43
44 const char *limit, *linep;
45 const char *keyp = argp->key.name;
46 int klen = strlen(keyp);
47
48 linep = line;
49 limit = line + linelen;
50
51 /*
52 * find the name in the namelist a|b|c...:
53 */
54 while (linep+klen < limit && *linep != '|' && *linep != ':') {
55 if ((strncmp(linep, keyp, klen) == 0) &&
56 ((*(linep + klen) == '|') || (*(linep + klen) == ':'))) {
57 return (1);
58 } else {
59 while (linep < limit && *linep != '|' && *linep != ':')
60 linep++;
61 if (linep >= limit || *linep == ':')
62 return (0);
63 if (*linep == '|')
64 linep++;
65 }
66 }
67 return (0);
68 }
69
70 nss_status_t
_nss_files_XY_printer(be,args,filter,check)71 _nss_files_XY_printer(be, args, filter, check)
72 files_backend_ptr_t be;
73 nss_XbyY_args_t *args;
74 const char *filter; /* advisory, to speed up */
75 /* string search */
76 files_XY_check_func check; /* NULL means one-shot, for getXXent */
77 {
78 nss_status_t res;
79 int parsestat;
80 int (*func)();
81
82 if (filter != NULL && *filter == '\0')
83 return (NSS_NOTFOUND);
84 if (be->buf == 0 &&
85 (be->buf = malloc(be->minbuf)) == 0) {
86 return (NSS_UNAVAIL); /* really panic, malloc failed */
87 }
88
89 if (check != 0 || be->f == 0) {
90 if ((res = _nss_files_setent(be, 0)) != NSS_SUCCESS) {
91 return (res);
92 }
93 }
94
95 res = NSS_NOTFOUND;
96
97 /*CONSTCOND*/
98 while (1) {
99 char *instr = be->buf;
100 int linelen;
101
102 if ((linelen = _nss_files_read_line(be->f, instr,
103 be->minbuf)) < 0) {
104 /* End of file */
105 args->returnval = 0;
106 args->returnlen = 0;
107 break;
108 }
109
110 /* begin at the first non-blank character */
111 while (isspace(*instr)) {
112 instr++;
113 linelen--;
114 }
115
116 /* comment line, skip it. */
117 if (*instr == '#')
118 continue;
119
120 /* blank line, skip it */
121 if ((*instr == '\n') || (*instr == '\0'))
122 continue;
123
124 if (filter != 0 && strstr(instr, filter) == 0) {
125 /*
126 * Optimization: if the entry doesn't contain the
127 * filter string then it can't be the entry we want,
128 * so don't bother looking more closely at it.
129 */
130 continue;
131 }
132
133 args->returnval = 0;
134 args->returnlen = 0;
135
136 if (check != NULL && (*check)(args, instr, linelen) == 0)
137 continue;
138
139 func = args->str2ent;
140 parsestat = (*func)(instr, linelen, args->buf.result,
141 args->buf.buffer, args->buf.buflen);
142
143 if (parsestat == NSS_STR_PARSE_SUCCESS) {
144 args->returnval = (args->buf.result != NULL)?
145 args->buf.result : args->buf.buffer;
146 args->returnlen = linelen;
147 res = NSS_SUCCESS;
148 break;
149 } else if (parsestat == NSS_STR_PARSE_ERANGE) {
150 args->erange = 1;
151 break;
152 } else if (parsestat == NSS_STR_PARSE_PARSE)
153 continue;
154 }
155
156 /*
157 * stayopen is set to 0 by default in order to close the opened
158 * file. Some applications may break if it is set to 1.
159 */
160 if (check != 0 && !args->stayopen) {
161 (void) _nss_files_endent(be, 0);
162 }
163
164 return (res);
165 }
166
167 static nss_status_t
getent(be,a)168 getent(be, a)
169 files_backend_ptr_t be;
170 void *a;
171 {
172 nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a;
173
174 return (_nss_files_XY_printer(be, argp, (const char *)0,
175 (files_XY_check_func)0));
176 }
177
178 static nss_status_t
getbyname(be,a)179 getbyname(be, a)
180 files_backend_ptr_t be;
181 void *a;
182 {
183 nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a;
184
185 return (_nss_files_XY_printer(be, argp, argp->key.name, check_name));
186 }
187
188 static files_backend_op_t printers_ops[] = {
189 _nss_files_destr,
190 _nss_files_endent,
191 _nss_files_setent,
192 getent,
193 getbyname
194 };
195
196 /*ARGSUSED*/
197 nss_backend_t *
_nss_files_printers_constr(dummy1,dummy2,dummy3)198 _nss_files_printers_constr(dummy1, dummy2, dummy3)
199 const char *dummy1, *dummy2, *dummy3;
200 {
201 return (_nss_files_constr(printers_ops,
202 sizeof (printers_ops) / sizeof (printers_ops[0]),
203 printers,
204 NSS_LINELEN_PRINTERS,
205 NULL));
206 }
207