1 files changed, 112 insertions, 0 deletions
diff --git a/src/util/dict_env.c b/src/util/dict_env.c
new file mode 100644
index 0000000..1635b8d
--- /dev/null
+++ b/src/util/dict_env.c
@@ -0,0 +1,112 @@
+/*++
+/* NAME
+/*	dict_env 3
+/* SUMMARY
+/*	dictionary manager interface to environment variables
+/* SYNOPSIS
+/*	#include <dict_env.h>
+/*
+/*	DICT	*dict_env_open(name, dummy, dict_flags)
+/*	const char *name;
+/*	int	dummy;
+/*	int	dict_flags;
+/* DESCRIPTION
+/*	dict_env_open() opens the environment variable array and
+/*	makes it accessible via the generic operations documented
+/*	in dict_open(3). The \fIname\fR and \fIdummy\fR arguments
+/*	are ignored.
+/* SEE ALSO
+/*	dict(3) generic dictionary manager
+/*	safe_getenv(3) safe getenv() interface
+/* 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 <stdio.h>			/* sprintf() prototype */
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+/* Utility library. */
+
+#include "mymalloc.h"
+#include "msg.h"
+#include "safe.h"
+#include "stringops.h"
+#include "dict.h"
+#include "dict_env.h"
+
+/* dict_env_update - update environment array */
+
+static int dict_env_update(DICT *dict, const char *name, const char *value)
+{
+    dict->error = 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, name);
+	name = lowercase(vstring_str(dict->fold_buf));
+    }
+    if (setenv(name, value, 1))
+	msg_fatal("setenv: %m");
+
+    return (DICT_STAT_SUCCESS);
+}
+
+/* dict_env_lookup - access environment array */
+
+static const char *dict_env_lookup(DICT *dict, const char *name)
+{
+    dict->error = 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, name);
+	name = lowercase(vstring_str(dict->fold_buf));
+    }
+    return (safe_getenv(name));
+}
+
+/* dict_env_close - close environment dictionary */
+
+static void dict_env_close(DICT *dict)
+{
+    if (dict->fold_buf)
+	vstring_free(dict->fold_buf);
+    dict_free(dict);
+}
+
+/* dict_env_open - make association with environment array */
+
+DICT   *dict_env_open(const char *name, int unused_flags, int dict_flags)
+{
+    DICT   *dict;
+
+    dict = dict_alloc(DICT_TYPE_ENVIRON, name, sizeof(*dict));
+    dict->lookup = dict_env_lookup;
+    dict->update = dict_env_update;
+    dict->close = dict_env_close;
+    dict->flags = dict_flags | DICT_FLAG_FIXED;
+    if (dict_flags & DICT_FLAG_FOLD_FIX)
+	dict->fold_buf = vstring_alloc(10);
+    dict->owner.status = DICT_OWNER_TRUSTED;
+    return (DICT_DEBUG (dict));
+}