svn commit: trunk/busybox/libbb

[vda at busybox.net]

Author: vda
Date: 2008-03-19 16:15:55 -0700 (Wed, 19 Mar 2008)
New Revision: 21405

Log:
...and actually adding new file now...



Added:
   trunk/busybox/libbb/die_if_bad_username.c


Changeset:
Added: trunk/busybox/libbb/die_if_bad_username.c
===================================================================
--- trunk/busybox/libbb/die_if_bad_username.c	                        (rev 0)
+++ trunk/busybox/libbb/die_if_bad_username.c	2008-03-19 23:15:55 UTC (rev 21405)
@@ -0,0 +1,34 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Ckeck user and group names for illegal characters
+ *
+ * Copyright (C) 2008 Tito Ragusa <farmatito at tiscali.it>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+#include "libbb.h"
+
+/* To avoid problems, the username should consist only of
+ * letters, digits, underscores, periods, at signs and dashes,
+ * and not start with a dash (as defined by IEEE Std 1003.1-2001).
+ * For compatibility with Samba machine accounts $ is also supported
+ * at the end of the username.
+ */
+
+void die_if_bad_username(const char *name)
+{
+	int i = 0;
+
+	do {
+		if (!isalnum(*name)
+		 && !(*name == '_')
+		 && !(*name == '.')
+		 && !(*name == '@')
+		 && !(*name == '-' && i)
+		 && !(*name == '$' && !*(name + 1))
+		)
+			bb_error_msg_and_die("illegal character '%c'", *name);
+		i++;
+	} while (*++name);
+}