1 files changed, 141 insertions, 0 deletions
diff --git a/src/lookups/nis.c b/src/lookups/nis.c
new file mode 100644
index 0000000..0024f44
--- /dev/null
+++ b/src/lookups/nis.c
@@ -0,0 +1,141 @@
+/*************************************************
+*     Exim - an Internet mail transport agent    *
+*************************************************/
+
+/* Copyright (c) The Exim Maintainers 2020 - 2022 */
+/* Copyright (c) University of Cambridge 1995 - 2015 */
+/* See the file NOTICE for conditions of use and distribution. */
+
+#include "../exim.h"
+#include "lf_functions.h"
+
+#include <rpcsvc/ypclnt.h>
+
+
+/*************************************************
+*              Open entry point                  *
+*************************************************/
+
+/* See local README for interface description. This serves for both
+the "nis" and "nis0" lookup types. */
+
+static void *
+nis_open(const uschar * filename, uschar ** errmsg)
+{
+char *nis_domain;
+if (yp_get_default_domain(&nis_domain) != 0)
+  {
+  *errmsg = US"failed to get default NIS domain";
+  return NULL;
+  }
+return nis_domain;
+}
+
+
+
+/*************************************************
+*           Find entry point for nis             *
+*************************************************/
+
+/* See local README for interface description. A separate function is used
+for nis0 because they are so short it isn't worth trying to use any common
+code. */
+
+static int
+nis_find(void * handle, const uschar * filename, const uschar * keystring,
+  int length, uschar ** result, uschar ** errmsg, uint * do_cache,
+  const uschar * opts)
+{
+int rc;
+uschar *nis_data;
+int nis_data_length;
+do_cache = do_cache;   /* Placate picky compilers */
+if ((rc = yp_match(CCS handle, CCS filename, CCS keystring, length,
+    CSS &nis_data, &nis_data_length)) == 0)
+  {
+  *result = string_copy(nis_data);
+  (*result)[nis_data_length] = 0;    /* remove final '\n' */
+  return OK;
+  }
+return (rc == YPERR_KEY || rc == YPERR_MAP)? FAIL : DEFER;
+}
+
+
+
+/*************************************************
+*           Find entry point for nis0            *
+*************************************************/
+
+/* See local README for interface description. */
+
+static int
+nis0_find(void * handle, const uschar * filename, const uschar * keystring,
+  int length, uschar ** result, uschar ** errmsg, uint * do_cache,
+  const uschar * opts)
+{
+int rc;
+uschar *nis_data;
+int nis_data_length;
+do_cache = do_cache;   /* Placate picky compilers */
+if ((rc = yp_match(CCS handle, CCS filename, CCS keystring, length + 1,
+    CSS &nis_data, &nis_data_length)) == 0)
+  {
+  *result = string_copy(nis_data);
+  (*result)[nis_data_length] = 0;    /* remove final '\n' */
+  return OK;
+  }
+return (rc == YPERR_KEY || rc == YPERR_MAP)? FAIL : DEFER;
+}
+
+
+
+/*************************************************
+*         Version reporting entry point          *
+*************************************************/
+
+/* See local README for interface description. */
+
+#include "../version.h"
+
+gstring *
+nis_version_report(gstring * g)
+{
+#ifdef DYNLOOKUP
+g = string_fmt_append(g, "Library version: NIS: Exim version %s\n", EXIM_VERSION_STR);
+#endif
+return g;
+}
+
+
+static lookup_info nis_lookup_info = {
+  .name = US"nis",			/* lookup name */
+  .type = 0,				/* not abs file, not query style*/
+  .open = nis_open,			/* open function */
+  .check = NULL,			/* check function */
+  .find = nis_find,			/* find function */
+  .close = NULL,			/* no close function */
+  .tidy = NULL,				/* no tidy function */
+  .quote = NULL,			/* no quoting function */
+  .version_report = nis_version_report             /* version reporting */
+};
+
+static lookup_info nis0_lookup_info = {
+  .name = US"nis0",			/* lookup name */
+  .type = 0,				/* not absfile, not query style */
+  .open = nis_open,			/* sic */         /* open function */
+  .check = NULL,			/* check function */
+  .find = nis0_find,			/* find function */
+  .close = NULL,			/* no close function */
+  .tidy = NULL,				/* no tidy function */
+  .quote = NULL,			/* no quoting function */
+  .version_report = NULL                           /* no version reporting (redundant) */
+};
+
+#ifdef DYNLOOKUP
+#define nis_lookup_module_info _lookup_module_info
+#endif
+
+static lookup_info *_lookup_list[] = { &nis_lookup_info, &nis0_lookup_info };
+lookup_module_info nis_lookup_module_info = { LOOKUP_MODULE_INFO_MAGIC, _lookup_list, 2 };
+
+/* End of lookups/nis.c */