1 files changed, 21 insertions, 0 deletions
diff --git a/kernel/libc/string/strlcpy.c b/kernel/libc/string/strlcpy.c
new file mode 100644
index 0000000..43d0e58
--- /dev/null
+++ b/kernel/libc/string/strlcpy.c
@@ -0,0 +1,21 @@
+#include <stddef.h>
+#include <string.h>
+
+// Copy string src to buffer dst of size dsize.  At most dsize-1
+// chars will be copied.  Always NUL terminates (unless dsize == 0).
+// Returns strlen(src); if retval >= dsize, truncation occurred.
+size_t strlcpy(char *dst, const char *src, size_t dsize) {
+  size_t n = dsize;
+  const char *osrc = src;
+  for (; n; n--) {
+    if ((*dst++ = *src++) == '\0')
+      break;
+  }
+  if (n == 0) {
+    if (dsize != 0)
+      *dst = '\0'; /* NUL-terminate dst */
+    while (*src++)
+      ;
+  }
+  return src - osrc - 1;
+}