Add stpcpy() and stpncpy(), pointless crap that made it into POSIX.

Includes friendly linker warning to wake up those dumb enough to use it.

Committing for kettenis@, who ran away to the hills after writing it

1 files changed, 44 insertions, 0 deletions

diff --git a/src/lib/libc/string/stpcpy.c b/src/lib/libc/string/stpcpy.c
new file mode 100644
index 0000000000..d3d61e0f14
--- /dev/null
+++ b/src/lib/libc/string/stpcpy.c
@@ -0,0 +1,44 @@
+/*      $OpenBSD: stpcpy.c,v 1.1 2012/01/17 02:48:01 guenther Exp $     */
+
+/*
+ * Copyright (c) 1988 Regents of the University of California.
+ * 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 University 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 REGENTS 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 REGENTS 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.
+ */
+
+#include <string.h>
+
+#if defined(APIWARN)
+__warn_references(stpcpy,
+    "warning: stpcpy() is dangerous GNU crap; don't use it");
+#endif
+
+char *
+stpcpy(char *to, const char *from)
+{
+        for (; (*to = *from) != '\0'; ++from, ++to);
+        return(to);
+}