libc testsuite + fixes

git-svn-id: svn://kolibrios.org@6433 a494cfbc-eb01-0410-851d-a64ba20cac60

programs/develop/ktcc/trunk/libc/stdio/clearerr.c

@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <string.h>
+
+void clearerr ( FILE * stream )
+{
+    errno = 0;
+}
+
+int ferror ( FILE * stream )
+{
+    return errno;
+}
+
+void perror ( const char * str )
+{
+    char *msg = strerror(errno);
+
+    if (str)
+        fprintf(stderr, "%s:%s\n", str, msg);
+    else
+        fprintf(stderr, "%s\n", msg);
+}