1 files changed, 80 insertions, 0 deletions
diff --git a/crypto/heimdal/lib/roken/get_default_username.c b/crypto/heimdal/lib/roken/get_default_username.c
new file mode 100644
index 0000000..10b0863
--- /dev/null
+++ b/crypto/heimdal/lib/roken/get_default_username.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 1997 - 1999 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden). 
+ * All rights reserved. 
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions 
+ * are met: 
+ *
+ * 1. Redistributions of source code must retain the above copyright 
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright 
+ *    notice, this list of conditions and the following disclaimer in the 
+ *    documentation and/or other materials provided with the distribution. 
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software 
+ *    without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+ * SUCH DAMAGE. 
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+RCSID("$Id: get_default_username.c,v 1.3 1999/12/02 16:58:46 joda Exp $");
+#endif /* HAVE_CONFIG_H */
+
+#include "roken.h"
+
+/*
+ * Try to return what should be considered the default username or
+ * NULL if we can't guess at all.
+ */
+
+const char *
+get_default_username (void)
+{
+    const char *user;
+
+    user = getenv ("USER");
+    if (user == NULL)
+	user = getenv ("LOGNAME");
+    if (user == NULL)
+	user = getenv ("USERNAME");
+
+#if defined(HAVE_GETLOGIN) && !defined(POSIX_GETLOGIN)
+    if (user == NULL) {
+	user = (const char *)getlogin ();
+	if (user != NULL)
+	    return user;
+    }
+#endif
+#ifdef HAVE_PWD_H
+    {
+	uid_t uid = getuid ();
+	struct passwd *pwd;
+
+	if (user != NULL) {
+	    pwd = k_getpwnam (user);
+	    if (pwd != NULL && pwd->pw_uid == uid)
+		return user;
+	}
+	pwd = k_getpwuid (uid);
+	if (pwd != NULL)
+	    return pwd->pw_name;
+    }
+#endif
+    return user;
+}