Add strlcpy() to the set of functions supported by src/port/ when not

available directly on the platform.  Per discussion, this function is
sufficiently widely recognized to be treated as standard.

3 files changed, 76 insertions, 2 deletions

diff --git a/src/include/pg_config.h.in b/src/include/pg_config.h.in
index 2acfac63183..7098eafb6f5 100644
--- a/src/include/pg_config.h.in
+++ b/src/include/pg_config.h.in
@@ -375,6 +375,9 @@
 /* Define to 1 if you have the <string.h> header file. */
 #undef HAVE_STRING_H
 
+/* Define to 1 if you have the `strlcpy' function. */
+#undef HAVE_STRLCPY
+
 /* Define to 1 if you have the `strtol' function. */
 #undef HAVE_STRTOL
 
diff --git a/src/include/port.h b/src/include/port.h
index ecf04941448..060981c850f 100644
--- a/src/include/port.h
+++ b/src/include/port.h
@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/port.h,v 1.99 2006/09/22 21:39:58 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/port.h,v 1.100 2006/09/27 16:29:46 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -329,7 +329,11 @@ extern int	inet_aton(const char *cp, struct in_addr * addr);
 #endif
 
 #ifndef HAVE_STRDUP
-extern char *strdup(char const *);
+extern char *strdup(const char *str);
+#endif
+
+#ifndef HAVE_STRLCPY
+extern size_t strlcpy(char *dst, const char *src, size_t siz);
 #endif
 
 #ifndef HAVE_RANDOM
diff --git a/src/port/strlcpy.c b/src/port/strlcpy.c
new file mode 100644
index 00000000000..e7e4f9ad341
--- /dev/null
+++ b/src/port/strlcpy.c
@@ -0,0 +1,67 @@
+/*-------------------------------------------------------------------------
+ *
+ * strlcpy.c
+ *	  strncpy done right
+ *
+ * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
+ *
+ *
+ * IDENTIFICATION
+ *	  $PostgreSQL: pgsql/src/port/strlcpy.c,v 1.1 2006/09/27 16:29:46 tgl Exp $
+ *
+ * This file was taken from OpenBSD and is used on platforms that don't
+ * provide strlcpy().  The OpenBSD copyright terms follow.
+ *-------------------------------------------------------------------------
+ */
+
+/*	$OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert Exp $	*/
+
+/*
+ * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "c.h"
+
+
+/*
+ * Copy src to string dst of size siz.  At most siz-1 characters
+ * will be copied.  Always NUL terminates (unless siz == 0).
+ * Returns strlen(src); if retval >= siz, truncation occurred.
+ */
+size_t
+strlcpy(char *dst, const char *src, size_t siz)
+{
+	char *d = dst;
+	const char *s = src;
+	size_t n = siz;
+
+	/* Copy as many bytes as will fit */
+	if (n != 0) {
+		while (--n != 0) {
+			if ((*d++ = *s++) == '\0')
+				break;
+		}
+	}
+
+	/* Not enough room in dst, add NUL and traverse rest of src */
+	if (n == 0) {
+		if (siz != 0)
+			*d = '\0';		/* NUL-terminate dst */
+		while (*s++)
+			;
+	}
+
+	return(s - src - 1);	/* count does not include NUL */
+}