Added test for interactive streams (_IOLBF / _IOFBF)

[pdclib] / internals / _PDCLIB_glue.h

diff --git a/internals/_PDCLIB_glue.h b/internals/_PDCLIB_glue.h
index f390dfaa84bf773169b516a89596e46133fa603b..02ba7f9e40af87b38b7a8dc0b60ffab8a51c648e 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 );
 
@@ -60,3 +61,9 @@ int _PDCLIB_remove( const char * filename );
    must still be accessible by old name.
 */
 int _PDCLIB_rename( const char * old, const char * new );
+
+/* A system call that returns one if the given file descriptor refers to an
+   interactive device, and zero otherwise.
+ */
+int _PDCLIB_isinteractive( _PDCLIB_fd_t fd );
+