1 files changed, 32 insertions, 0 deletions
diff --git a/mint/errno.h b/mint/errno.h
new file mode 100644
index 0000000000..5c19d0efa7
--- /dev/null
+++ b/mint/errno.h
@@ -0,0 +1,32 @@
+/* Wrapper around broken system errno.h.  */
+
+#ifndef _PERL_WRAPPER_AROUND_ERRNO_H
+# define _PERL_WRAPPER_AROUND_ERRNO_H 1
+
+/* First include the system file.  */
+#include_next <errno.h> 
+
+/* Now add the missing stuff.
+#ifndef EAGAIN
+# define EAGAIN EWOULDBLOCK
+#endif
+
+/* This one is problematic.  If you open() a directory with the
+   MiNTLib you can't detect from errno if it is really a directory
+   or if the file simply doesn't exist.  You'll get ENOENT 
+   ("file not found") in either case.
+   
+   Defining EISDIR as ENOENT is actually a bad idea but works fine
+   in general.  In praxi, if code checks for errno == EISDIR it
+   will attempt an opendir() call on the file in question and this
+   call will also file if the file really can't be found.  But
+   you may get compile-time errors if the errno checking is embedded
+   in a switch statement ("duplicate case value in switch").
+   
+   Anyway, here the define works alright.  */
+#ifndef EISDIR
+# define EISDIR ENOENT
+#endif
+
+#endif
+