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
30 #if defined(LIBC_SCCS) && !defined(lint)
31 static char sccsid[] = "@(#)getusershell.c 8.1 (Berkeley) 6/4/93";
32 #endif /* LIBC_SCCS and not lint */
33 /* $NetBSD: getusershell.c,v 1.17 1999/01/25 01:09:34 lukem Exp $ */
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
37 #include "namespace.h"
38 #include <sys/param.h>
48 #include <stringlist.h>
56 #include <rpcsvc/ypclnt.h>
57 #include <rpcsvc/yp_prot.h>
59 #include "un-namespace.h"
61 static const char *const *curshell;
62 static StringList *sl;
64 static const char *const *initshells(void);
67 * Get a list of shells from "shells" nsswitch database
75 curshell = initshells();
77 ret = (char *)*curshell;
97 curshell = initshells();
101 static int _local_initshells(void *, void *, va_list);
105 _local_initshells(void *rv, void *cb_data, va_list ap)
109 char line[MAXPATHLEN + 2];
115 if ((fp = fopen(_PATH_SHELLS, "re")) == NULL)
119 while (fgets(cp, MAXPATHLEN + 1, fp) != NULL) {
120 while (*cp != '#' && *cp != '/' && *cp != '\0')
122 if (*cp == '#' || *cp == '\0')
125 while (!isspace(*cp) && *cp != '#' && *cp != '\0')
128 sl_add(sl, strdup(sp));
135 static int _dns_initshells(void *, void *, va_list);
139 _dns_initshells(void *rv, void *cb_data, va_list ap)
141 char shellname[] = "shells-XXXXX";
150 if (hesiod_init(&context) == -1)
153 for (hsindex = 0; ; hsindex++) {
154 snprintf(shellname, sizeof(shellname)-1, "shells-%d", hsindex);
155 hp = hesiod_resolve(context, shellname, "shells");
157 if (errno == ENOENT) {
165 for (hpi = 0; hp[hpi]; hpi++)
176 static int _nis_initshells(void *, void *, va_list);
180 _nis_initshells(void *rv, void *cb_data, va_list ap)
182 static char *ypdomain;
192 if (ypdomain == NULL) {
193 switch (yp_get_default_domain(&ypdomain)) {
204 * `key' and `data' point to strings dynamically allocated by
205 * the yp_... functions.
206 * `data' is directly put into the stringlist of shells.
209 if (yp_first(ypdomain, "shells", &key, &keylen, &data, &datalen))
212 data[datalen] = '\0'; /* clear trailing \n */
216 r = yp_next(ypdomain, "shells", lastkey, keylen,
217 &key, &keylen, &data, &datalen);
221 if (r == YPERR_NOMORE) {
223 * `data' and `key' ought to be NULL - do not try to free them.
232 static const char *const *
235 static const ns_dtab dtab[] = {
236 NS_FILES_CB(_local_initshells, NULL)
237 NS_DNS_CB(_dns_initshells, NULL)
238 NS_NIS_CB(_nis_initshells, NULL)
245 if (_nsdispatch(NULL, dtab, NSDB_SHELLS, "initshells", __nsdefaultsrc)
251 * Local shells should NOT be added here. They should be
252 * added in /etc/shells.
254 sl_add(sl, strdup(_PATH_BSHELL));
255 sl_add(sl, strdup(_PATH_CSHELL));
259 return (const char *const *)(sl->sl_str);