pull strlcpy.c from OpenBSD libc sources

diff --git a/Makefile b/Makefile
index 72f59b1338500ef4798c0e2c33ab635134842d43..8f77e23fd893995bf25119b934d95c99d1822d54 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@
 PROG=   pax
 SRCS=  ar_io.c ar_subs.c buf_subs.c cache.c cpio.c file_subs.c ftree.c\
        gen_subs.c getoldopt.c options.c pat_rep.c pax.c sel_subs.c tables.c\
-       tar.c tty_subs.c fgetln.c strmode.c
+       tar.c tty_subs.c fgetln.c strmode.c strlcpy.o
 OBJS=  $(SRCS:.c=.o)
 MAN=   pax.1
 

diff --git a/strlcpy.c b/strlcpy.c
new file mode 100644 (file)
index 0000000..d32b659
--- /dev/null
+++ b/strlcpy.c
@@ -0,0 +1,51 @@
+/*     $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 <sys/types.h>
+#include <string.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 */
+}