pSOSystem System Calls - Read

fflush pREPC+ System Calls
fflush Flushes the buffer associated with an open stream.
#include
#include
int fflush(
FILE *stream /* stream pointer */
)
Description
Arguments
Return Value
Error Codes
Notes
The fflush() function writes any unwritten, buffered data associated with the
stream pointed to by stream to the file or I/O device. An error is returned if the
stream has not been opened for write or update. If stream is a null pointer, the
fflush() function performs the flushing action on all the streams open for write or
update.
stream Points to an open pREPC+ stream.
This function returns 0 if successful or EOF on error. If an error occurs, errno is
set.
Refer to Appendix B.
1. If the write is to an I/O device, fflush() calls the pSOS+ I/O call
de_write().
2. If the write is to a disk file, fflush() calls the pHILE+ call write_f().
Callable From
■ Task
3-34 pSOSystem System Calls