2 * Copyright (c) 1985, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#)getusershell.c 8.1 (Berkeley) 6/4/93
30 * $NetBSD: getusershell.c,v 1.17 1999/01/25 01:09:34 lukem Exp $
31 * $FreeBSD: src/lib/libc/gen/getusershell.c,v 1.10 2007/01/09 00:27:54 imp Exp $
32 * $DragonFly: src/lib/libc/gen/getusershell.c,v 1.4 2005/11/13 00:07:42 swildner Exp $
35 #include "namespace.h"
36 #include <sys/param.h>
46 #include <stringlist.h>
54 #include <rpcsvc/ypclnt.h>
55 #include <rpcsvc/yp_prot.h>
57 #include "un-namespace.h"
60 * Local shells should NOT be added here. They should be added in
64 static const char *const okshells
[] = { _PATH_BSHELL
, _PATH_CSHELL
, NULL
};
65 static const char *const *curshell
;
66 static StringList
*sl
;
68 static const char *const *initshells(void);
71 * Get a list of shells from "shells" nsswitch database
79 curshell
= initshells();
81 ret
= (char *)*curshell
;
101 curshell
= initshells();
105 static int _local_initshells(void *, void *, va_list);
109 _local_initshells(void *rv
, void *cb_data
, va_list ap
)
113 char line
[MAXPATHLEN
+ 2];
119 if ((fp
= fopen(_PATH_SHELLS
, "r")) == NULL
)
123 while (fgets(cp
, MAXPATHLEN
+ 1, fp
) != NULL
) {
124 while (*cp
!= '#' && *cp
!= '/' && *cp
!= '\0')
126 if (*cp
== '#' || *cp
== '\0')
129 while (!isspace(*cp
) && *cp
!= '#' && *cp
!= '\0')
132 sl_add(sl
, strdup(sp
));
139 static int _dns_initshells(void *, void *, va_list);
143 _dns_initshells(void *rv
, void *cb_data
, va_list ap
)
145 char shellname
[] = "shells-XXXXX";
154 if (hesiod_init(&context
) == -1)
157 for (hsindex
= 0; ; hsindex
++) {
158 snprintf(shellname
, sizeof(shellname
)-1, "shells-%d", hsindex
);
159 hp
= hesiod_resolve(context
, shellname
, "shells");
161 if (errno
== ENOENT
) {
169 for (hpi
= 0; hp
[hpi
]; hpi
++)
180 static int _nis_initshells(void *, void *, va_list);
184 _nis_initshells(void *rv
, void *cb_data
, va_list ap
)
186 static char *ypdomain
;
196 if (ypdomain
== NULL
) {
197 switch (yp_get_default_domain(&ypdomain
)) {
208 * `key' and `data' point to strings dynamically allocated by
209 * the yp_... functions.
210 * `data' is directly put into the stringlist of shells.
213 if (yp_first(ypdomain
, "shells", &key
, &keylen
, &data
, &datalen
))
216 data
[datalen
] = '\0'; /* clear trailing \n */
220 r
= yp_next(ypdomain
, "shells", lastkey
, keylen
,
221 &key
, &keylen
, &data
, &datalen
);
225 if (r
== YPERR_NOMORE
) {
227 * `data' and `key' ought to be NULL - do not try to free them.
236 static const char *const *
239 static const ns_dtab dtab
[] = {
240 NS_FILES_CB(_local_initshells
, NULL
)
241 NS_DNS_CB(_dns_initshells
, NULL
)
242 NS_NIS_CB(_nis_initshells
, NULL
)
249 if (_nsdispatch(NULL
, dtab
, NSDB_SHELLS
, "initshells", __nsdefaultsrc
)
258 return (const char *const *)(sl
->sl_str
);