fclose - close a stream
Library Synopsis Description Return Values Errors Notes See Also Standards
.In stdio.h int fclose "FILE *stream"
The fclose function dissociates the named stream from its underlying file or set of functions. If the stream was being used for output, any buffered data is written first, using fflush(3).
Upon successful completion 0 is returned. Otherwise, EOF is returned and the global variable errno is set to indicate the error. In either case no further access to the stream is possible.
The fclose function may also fail and set errno for any of the errors specified for the routines close(2) or fflush(3).
The fclose function does not handle NULL arguments; they will result in a segmentation violation. This is intentional - it makes it easier to make sure programs written under .Fx are bug free. This behaviour is an implementation detail, and programs should not rely upon it.
close(2), fflush(3), fopen(3), setbuf(3)