kern: os: Add copyinstr()

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/sys/include/os/systm.h b/src/sys/include/os/systm.h
index 33de08a..24f21db 100644
--- a/src/sys/include/os/systm.h
+++ b/src/sys/include/os/systm.h
@@ -33,6 +33,18 @@
 #include <sys/types.h>
 
 /*
+ * Copy userland string to kernel space safely
+ *
+ * @uaddr: Userspace source address to copy from
+ * @kaddr: Kernel address dest address to copy to
+ * @len: Length of buffer
+ *
+ * Returns 0 on success, otherwise a less than zero value
+ * on failure.
+ */
+int copyinstr(const void *uaddr, char *kaddr, size_t len);
+
+/*
  * Copy userland data to kernel space safely
  *
  * @uaddr: Userspace source address to copy from