Adding upstream version 3.4.23.upstream/3.4.23upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 247 insertions, 0 deletions

diff --git a/src/util/dict_nis.c b/src/util/dict_nis.c
new file mode 100644
index 0000000..357011f
--- /dev/null
+++ b/src/util/dict_nis.c
@@ -0,0 +1,247 @@
+/*++
+/* NAME
+/*	dict_nis 3
+/* SUMMARY
+/*	dictionary manager interface to NIS maps
+/* SYNOPSIS
+/*	#include <dict_nis.h>
+/*
+/*	DICT	*dict_nis_open(map, open_flags, dict_flags)
+/*	const char *map;
+/*	int	open_flags;
+/*	int	dict_flags;
+/* DESCRIPTION
+/*	dict_nis_open() makes the specified NIS map accessible via
+/*	the generic dictionary operations described in dict_open(3).
+/* SEE ALSO
+/*	dict(3) generic dictionary manager
+/* DIAGNOSTICS
+/*	Fatal errors: out of memory, attempt to update NIS map.
+/* LICENSE
+/* .ad
+/* .fi
+/*	The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/*	Wietse Venema
+/*	IBM T.J. Watson Research
+/*	P.O. Box 704
+/*	Yorktown Heights, NY 10598, USA
+/*--*/
+
+/* System library. */
+
+#include "sys_defs.h"
+#include <string.h>
+
+#ifdef STRCASECMP_IN_STRINGS_H
+#include <strings.h>
+#endif
+
+#ifdef HAS_NIS
+
+#include <rpcsvc/ypclnt.h>
+#ifndef YPERR_BUSY
+#define YPERR_BUSY  16
+#endif
+#ifndef YPERR_ACCESS
+#define YPERR_ACCESS  15
+#endif
+
+#endif
+
+/* Utility library. */
+
+#include "msg.h"
+#include "mymalloc.h"
+#include "vstring.h"
+#include "stringops.h"
+#include "dict.h"
+#include "dict_nis.h"
+
+#ifdef HAS_NIS
+
+/* Application-specific. */
+
+typedef struct {
+    DICT    dict;			/* generic members */
+} DICT_NIS;
+
+ /*
+  * Class variables, so that multiple maps can share this info.
+  */
+static char dict_nis_disabled[1];
+static char *dict_nis_domain;
+
+/* dict_nis_init - NIS binding */
+
+static void dict_nis_init(void)
+{
+    const char *myname = "dict_nis_init";
+
+    if (yp_get_default_domain(&dict_nis_domain) != 0
+	|| dict_nis_domain == 0 || *dict_nis_domain == 0
+	|| strcasecmp(dict_nis_domain, "(none)") == 0) {
+	dict_nis_domain = dict_nis_disabled;
+	msg_warn("%s: NIS domain name not set - NIS lookups disabled", myname);
+    }
+    if (msg_verbose)
+	msg_info("%s: NIS domain %s", myname, dict_nis_domain);
+}
+
+/* dict_nis_strerror - map error number to string */
+
+static char *dict_nis_strerror(int err)
+{
+
+    /*
+     * Grr. There should be a standard function for this.
+     */
+    switch (err) {
+	case YPERR_BADARGS:
+	return ("args to function are bad");
+    case YPERR_RPC:
+	return ("RPC failure - domain has been unbound");
+    case YPERR_DOMAIN:
+	return ("can't bind to server on this domain");
+    case YPERR_MAP:
+	return ("no such map in server's domain");
+    case YPERR_KEY:
+	return ("no such key in map");
+    case YPERR_YPERR:
+	return ("internal yp server or client error");
+    case YPERR_RESRC:
+	return ("resource allocation failure");
+    case YPERR_NOMORE:
+	return ("no more records in map database");
+    case YPERR_PMAP:
+	return ("can't communicate with portmapper");
+    case YPERR_YPBIND:
+	return ("can't communicate with ypbind");
+    case YPERR_YPSERV:
+	return ("can't communicate with ypserv");
+    case YPERR_NODOM:
+	return ("local domain name not set");
+    case YPERR_BADDB:
+	return ("yp database is bad");
+    case YPERR_VERS:
+	return ("yp version mismatch");
+    case YPERR_ACCESS:
+	return ("access violation");
+    case YPERR_BUSY:
+	return ("database busy");
+    default:
+	return ("unknown NIS lookup error");
+    }
+}
+
+/* dict_nis_lookup - find table entry */
+
+static const char *dict_nis_lookup(DICT *dict, const char *key)
+{
+    DICT_NIS *dict_nis = (DICT_NIS *) dict;
+    static char *result;
+    int     result_len;
+    int     err;
+    static VSTRING *buf;
+
+    dict->error = 0;
+
+    /*
+     * Sanity check.
+     */
+    if ((dict->flags & (DICT_FLAG_TRY1NULL | DICT_FLAG_TRY0NULL)) == 0)
+	msg_panic("dict_nis_lookup: no DICT_FLAG_TRY1NULL | DICT_FLAG_TRY0NULL flag");
+
+    if (dict_nis_domain == dict_nis_disabled)
+	return (0);
+
+    /*
+     * Optionally fold the key.
+     */
+    if (dict->flags & DICT_FLAG_FOLD_FIX) {
+	if (dict->fold_buf == 0)
+	    dict->fold_buf = vstring_alloc(10);
+	vstring_strcpy(dict->fold_buf, key);
+	key = lowercase(vstring_str(dict->fold_buf));
+    }
+
+    /*
+     * See if this NIS map was written with one null byte appended to key and
+     * value.
+     */
+    if (dict->flags & DICT_FLAG_TRY1NULL) {
+	err = yp_match(dict_nis_domain, dict_nis->dict.name,
+		       (void *) key, strlen(key) + 1,
+		       &result, &result_len);
+	if (err == 0) {
+	    dict->flags &= ~DICT_FLAG_TRY0NULL;
+	    return (result);
+	}
+    }
+
+    /*
+     * See if this NIS map was written with no null byte appended to key and
+     * value. This should never be the case, but better play safe.
+     */
+    if (dict->flags & DICT_FLAG_TRY0NULL) {
+	err = yp_match(dict_nis_domain, dict_nis->dict.name,
+		       (void *) key, strlen(key),
+		       &result, &result_len);
+	if (err == 0) {
+	    dict->flags &= ~DICT_FLAG_TRY1NULL;
+	    if (buf == 0)
+		buf = vstring_alloc(10);
+	    vstring_strncpy(buf, result, result_len);
+	    return (vstring_str(buf));
+	}
+    }
+
+    /*
+     * When the NIS lookup fails for reasons other than "key not found", keep
+     * logging warnings, and hope that someone will eventually notice the
+     * problem and fix it.
+     */
+    if (err != YPERR_KEY) {
+	msg_warn("lookup %s, NIS domain %s, map %s: %s",
+		 key, dict_nis_domain, dict_nis->dict.name,
+		 dict_nis_strerror(err));
+	dict->error = DICT_ERR_RETRY;
+    }
+    return (0);
+}
+
+/* dict_nis_close - close NIS map */
+
+static void dict_nis_close(DICT *dict)
+{
+    if (dict->fold_buf)
+	vstring_free(dict->fold_buf);
+    dict_free(dict);
+}
+
+/* dict_nis_open - open NIS map */
+
+DICT   *dict_nis_open(const char *map, int open_flags, int dict_flags)
+{
+    DICT_NIS *dict_nis;
+
+    if (open_flags != O_RDONLY)
+	return (dict_surrogate(DICT_TYPE_NIS, map, open_flags, dict_flags,
+			       "%s:%s map requires O_RDONLY access mode",
+			       DICT_TYPE_NIS, map));
+
+    dict_nis = (DICT_NIS *) dict_alloc(DICT_TYPE_NIS, map, sizeof(*dict_nis));
+    dict_nis->dict.lookup = dict_nis_lookup;
+    dict_nis->dict.close = dict_nis_close;
+    dict_nis->dict.flags = dict_flags | DICT_FLAG_FIXED;
+    if ((dict_flags & (DICT_FLAG_TRY1NULL | DICT_FLAG_TRY0NULL)) == 0)
+	dict_nis->dict.flags |= (DICT_FLAG_TRY1NULL | DICT_FLAG_TRY0NULL);
+    if (dict_flags & DICT_FLAG_FOLD_FIX)
+	dict_nis->dict.fold_buf = vstring_alloc(10);
+    if (dict_nis_domain == 0)
+	dict_nis_init();
+    dict_nis->dict.owner.status = DICT_OWNER_TRUSTED;
+    return (DICT_DEBUG (&dict_nis->dict));
+}
+
+#endif