Minor cleanups.

[pdclib] / internals / _PDCLIB_glue.h

diff --git a/internals/_PDCLIB_glue.h b/internals/_PDCLIB_glue.h
index 0ffbebc7eb6b97a1fa0d89e488ff5f6dde826931..505b91930cd78ade1a12f127ea445bf7070d9b62 100644 (file)
--- a/internals/_PDCLIB_glue.h
+++ b/internals/_PDCLIB_glue.h
@@ -36,7 +36,8 @@ void * _PDCLIB_allocpages( int n );
 _PDCLIB_fd_t _PDCLIB_open( char const * const filename, unsigned int mode );
 
 /* A system call that writes n characters to a file identified by given file
-   descriptor. Return the number of characters written.
+   descriptor. Return the number of characters actually written, or zero if
+   an error occured.
 */
 _PDCLIB_size_t _PDCLIB_write( _PDCLIB_fd_t fd, char const * buffer, _PDCLIB_size_t n );
 
@@ -45,8 +46,10 @@ _PDCLIB_size_t _PDCLIB_write( _PDCLIB_fd_t fd, char const * buffer, _PDCLIB_size
 */
 _PDCLIB_size_t _PDCLIB_read( _PDCLIB_fd_t fd, char * buffer, _PDCLIB_size_t n );
 
-/* A system call that closes a file identified by given file descriptor. */
-void _PDCLIB_close( _PDCLIB_fd_t fd );
+/* A system call that closes a file identified by given file descriptor. Return
+   zero on success, non-zero otherwise.
+*/
+int _PDCLIB_close( _PDCLIB_fd_t fd );
 
 /* A system call that removes a file identified by name. Return zero on success,
    non-zero otherwise.