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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 $
34 #include "namespace.h"
35 #include <sys/param.h>
45 #include <stringlist.h>
53 #include <rpcsvc/ypclnt.h>
54 #include <rpcsvc/yp_prot.h>
56 #include "un-namespace.h"
59 * Local shells should NOT be added here. They should be added in
63 static const char *const okshells[] = { _PATH_BSHELL, _PATH_CSHELL, NULL };
64 static const char *const *curshell;
65 static StringList *sl;
67 static const char *const *initshells(void);
70 * Get a list of shells from "shells" nsswitch database
78 curshell = initshells();
80 ret = (char *)*curshell;
100 curshell = initshells();
104 static int _local_initshells(void *, void *, va_list);
108 _local_initshells(void *rv __unused, void *cb_data __unused,
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 __unused, void *cb_data __unused, va_list ap __unused)
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);