FCLOSE

FCLOSE

NAME SYNOPSIS DESCRIPTION RETURN VALUE ERRORS NOTES CONFORMING TO SEE ALSO

NAME

fclose - close a stream

SYNOPSIS

#include

int fclose( FILE *stream);

DESCRIPTION

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).

RETURN VALUE

Upon successful completion 0 is returned. Otherwise, EOF is returned and the global variable errno is set to indicate the error. In either case any further access (including another call to fclose()) to the stream results in undefined behaviour.

ERRORS

EBADF

The filedescriptor underlying stream is not valid.

The fclose function may also fail and set errno for any of the errors specified for the routines close(2), write(2) or fflush(3).

NOTES

Note that fclose only flushes the user space buffers provided by the C library. To ensure that the data is physically stored on disk the kernel buffers must be flushed too, e.g. with sync(2) or fsync(2).

CONFORMING TO

The fclose function conforms to ANSI X3.159-1989 (``ANSI C'').

SEE ALSO

close(2), fcloseall(3), fflush(3), fopen(3), setbuf(3)