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 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 *
25 * files/bootparams_getbyname.c -- "files" backend for
26 * nsswitch "bootparams" database.
27 */
28
29 #pragma ident "%Z%%M% %I% %E% SMI"
30
31 static const char *bootparams = "/etc/bootparams";
32
33 #include "files_common.h"
34 #include <stdlib.h>
35 #include <ctype.h>
36 #include <strings.h>
37
38 static nss_status_t _nss_files_XY_bootparams(files_backend_ptr_t,
39 nss_XbyY_args_t *, const char *);
40
41 static nss_status_t
getbyname(be,a)42 getbyname(be, a)
43 files_backend_ptr_t be;
44 void *a;
45 {
46 nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a;
47 nss_status_t res;
48
49 /* bootparams_getbyname() has not set/endent; rewind on each call */
50 if ((res = _nss_files_setent(be, 0)) != NSS_SUCCESS) {
51 return (res);
52 }
53 return (_nss_files_XY_bootparams(be, argp, argp->key.name));
54 }
55
56 static files_backend_op_t bootparams_ops[] = {
57 _nss_files_destr,
58 getbyname
59 };
60
61 /*ARGSUSED*/
62 nss_backend_t *
_nss_files_bootparams_constr(dummy1,dummy2,dummy3)63 _nss_files_bootparams_constr(dummy1, dummy2, dummy3)
64 const char *dummy1, *dummy2, *dummy3;
65 {
66 return (_nss_files_constr(bootparams_ops,
67 sizeof (bootparams_ops) / sizeof (bootparams_ops[0]),
68 bootparams,
69 NSS_LINELEN_BOOTPARAMS,
70 NULL));
71 }
72
73 /*
74 * bootparams has the hostname as part of the data in the file, but the other
75 * backends don't include it in the data passed to the backend. For this
76 * reason, we process everything here and don't bother calling the backend.
77 */
78 /*ARGSUSED*/
79 static nss_status_t
_nss_files_XY_bootparams(be,args,filter)80 _nss_files_XY_bootparams(be, args, filter)
81 files_backend_ptr_t be;
82 nss_XbyY_args_t *args;
83 const char *filter;
84 /*
85 * filter not useful here since the key
86 * we are looking for is the first "word"
87 * on the line and we can be fast enough.
88 */
89 {
90 nss_status_t res;
91
92 if (be->buf == 0 &&
93 (be->buf = (char *)malloc(be->minbuf)) == 0) {
94 (void) _nss_files_endent(be, 0);
95 return (NSS_UNAVAIL); /* really panic, malloc failed */
96 }
97
98 res = NSS_NOTFOUND;
99
100 /*CONSTCOND*/
101 while (1) {
102 char *instr = be->buf;
103 char *p, *host, *limit;
104 int linelen;
105
106 /*
107 * _nss_files_read_line does process the '\' that are used
108 * in /etc/bootparams for continuation and gives one long
109 * buffer.
110 *
111 * linelen counts the characters up to but excluding the '\n'
112 */
113 if ((linelen = _nss_files_read_line(be->f, instr,
114 be->minbuf)) < 0) {
115 /* End of file */
116 args->returnval = 0;
117 args->returnlen = 0;
118 break;
119 }
120
121 /*
122 * we need to strip off the host name before returning it.
123 */
124 p = instr;
125 limit = p + linelen;
126
127 /* Skip over leading whitespace */
128 while (p < limit && isspace(*p)) {
129 p++;
130 }
131 host = p;
132
133 /* Skip over the hostname */
134 while (p < limit && !isspace(*p)) {
135 p++;
136 }
137 *p++ = '\0';
138
139 if (strcasecmp(args->key.name, host) != 0) {
140 continue;
141 }
142
143 /* Skip over whitespace between name and first datum */
144 while (p < limit && isspace(*p)) {
145 p++;
146 }
147 if (p >= limit) {
148 /* Syntax error -- no data! Just skip it. */
149 continue;
150 }
151
152 linelen -= (p - instr);
153 if (args->buf.buflen <= linelen) { /* not enough buffer */
154 args->erange = 1;
155 break;
156 }
157 (void) memcpy(args->buf.buffer, p, linelen);
158 args->buf.buffer[linelen] = '\0';
159 args->returnval = args->buf.result;
160 args->returnlen = linelen;
161 res = NSS_SUCCESS;
162 break;
163 }
164 (void) _nss_files_endent(be, 0);
165 return (res);
166 }
167