2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1985, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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32 #if defined(LIBC_SCCS) && !defined(lint)
33 static char sccsid[] = "@(#)getusershell.c 8.1 (Berkeley) 6/4/93";
34 #endif /* LIBC_SCCS and not lint */
35 /* $NetBSD: getusershell.c,v 1.17 1999/01/25 01:09:34 lukem Exp $ */
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
39 #include "namespace.h"
40 #include <sys/param.h>
50 #include <stringlist.h>
58 #include <rpcsvc/ypclnt.h>
59 #include <rpcsvc/yp_prot.h>
61 #include "un-namespace.h"
63 static const char *const *curshell;
64 static StringList *sl;
66 static const char *const *initshells(void);
69 * Get a list of shells from "shells" nsswitch database
77 curshell = initshells();
79 ret = (char *)*curshell;
99 curshell = initshells();
103 static int _local_initshells(void *, void *, va_list);
107 _local_initshells(void *rv, void *cb_data, va_list ap)
111 char line[MAXPATHLEN + 2];
117 if ((fp = fopen(_PATH_SHELLS, "re")) == NULL)
120 while (fgets(line, MAXPATHLEN + 1, fp) != NULL) {
122 while (*cp != '#' && *cp != '/' && *cp != '\0')
124 if (*cp == '#' || *cp == '\0')
127 while (!isspace(*cp) && *cp != '#' && *cp != '\0')
130 sl_add(sl, strdup(sp));
137 static int _dns_initshells(void *, void *, va_list);
141 _dns_initshells(void *rv, void *cb_data, va_list ap)
143 char shellname[] = "shells-XXXXX";
152 if (hesiod_init(&context) == -1)
155 for (hsindex = 0; ; hsindex++) {
156 snprintf(shellname, sizeof(shellname)-1, "shells-%d", hsindex);
157 hp = hesiod_resolve(context, shellname, "shells");
159 if (errno == ENOENT) {
167 for (hpi = 0; hp[hpi]; hpi++)
178 static int _nis_initshells(void *, void *, va_list);
182 _nis_initshells(void *rv, void *cb_data, va_list ap)
184 static char *ypdomain;
194 if (ypdomain == NULL) {
195 switch (yp_get_default_domain(&ypdomain)) {
206 * `key' and `data' point to strings dynamically allocated by
207 * the yp_... functions.
208 * `data' is directly put into the stringlist of shells.
211 if (yp_first(ypdomain, "shells", &key, &keylen, &data, &datalen))
214 data[datalen] = '\0'; /* clear trailing \n */
218 r = yp_next(ypdomain, "shells", lastkey, keylen,
219 &key, &keylen, &data, &datalen);
223 if (r == YPERR_NOMORE) {
225 * `data' and `key' ought to be NULL - do not try to free them.
234 static const char *const *
237 static const ns_dtab dtab[] = {
238 NS_FILES_CB(_local_initshells, NULL)
239 NS_DNS_CB(_dns_initshells, NULL)
240 NS_NIS_CB(_nis_initshells, NULL)
247 if (_nsdispatch(NULL, dtab, NSDB_SHELLS, "initshells", __nsdefaultsrc)
253 * Local shells should NOT be added here. They should be
254 * added in /etc/shells.
256 sl_add(sl, strdup(_PATH_BSHELL));
257 sl_add(sl, strdup(_PATH_CSHELL));
261 return (const char *const *)(sl->sl_str);