- Changed how error conditions raised by dos.library file I/O functions

are detected.

- Modified function return values of 0 and -1 to use macros like OK,
  ERROR/SEEK_ERROR instead, to better convey what the purpose of these
  values is.


git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@14922 87f5fb63-7c3d-0410-a384-fd976d0f7a62

library/fcntl_write.c

@@ -1,5 +1,5 @@
 /*
- * $Id: fcntl_write.c,v 1.7 2005-02-28 10:07:30 obarthel Exp $
+ * $Id: fcntl_write.c,v 1.8 2005-04-24 08:46:37 obarthel Exp $
  *
  * :ts=4
  *
@@ -51,7 +51,7 @@ ssize_t
 write(int file_descriptor, const void * buffer, size_t num_bytes)
 {
 	ssize_t num_bytes_written;
-	ssize_t result = -1;
+	ssize_t result = EOF;
 	struct fd * fd;
 
 	ENTER();
@@ -110,7 +110,7 @@ write(int file_descriptor, const void * buffer, size_t num_bytes)
 		assert( fd->fd_Action != NULL );
 
 		num_bytes_written = (*fd->fd_Action)(fd,&fam);
-		if(num_bytes_written < 0)
+		if(num_bytes_written == EOF)
 		{
 			__set_errno(fam.fam_Error);
 			goto out;