New errno.h standard header

Use standard errno codes. This change also adds strerror to string.h.

1 files changed, 3 insertions, 32 deletions

diff --git a/kern/error.c b/kern/error.c
index f5d43e4..10d6954 100644
--- a/kern/error.c
+++ b/kern/error.c
@@ -15,42 +15,13 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <errno.h>
 #include <stddef.h>
+#include <string.h>
 
 #include <kern/error.h>
 #include <kern/panic.h>
 
-const char *
-error_str(int error)
-{
-    switch (error) {
-    case 0:
-        return "success";
-    case ERROR_NOMEM:
-        return "out of memory";
-    case ERROR_AGAIN:
-        return "resource temporarily unavailable";
-    case ERROR_INVAL:
-        return "invalid argument";
-    case ERROR_BUSY:
-        return "device or resource busy";
-    case ERROR_FAULT:
-        return "bad address";
-    case ERROR_NODEV:
-        return "no such device";
-    case ERROR_EXIST:
-        return "entry exists";
-    case ERROR_IO:
-        return "input/output error";
-    case ERROR_SRCH:
-        return "no such process";
-    case ERROR_TIMEDOUT:
-        return "timeout error";
-    default:
-        return "unknown error";
-    }
-}
-
 void
 error_check(int error, const char *prefix)
 {
@@ -61,5 +32,5 @@ error_check(int error, const char *prefix)
     panic("%s%s%s",
           (prefix == NULL) ? "" : prefix,
           (prefix == NULL) ? "" : ": ",
-          error_str(error));
+          strerror(error));
 }