FCLOSE Section: Linux Programmer's Manual (3) Updated: 29 November 2025 Index   NAME fclose - close a stream   SYNOPSIS #include <stdio.h> 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   RETURN VALUES 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 argument stream is not an open stream. The fclose function may also fail and set errno for any of the errors specified for the routines or   SEE ALSO   STANDARDS The fclose function conforms to ANSI C3.159-1989 (``ANSI C'').   Index NAME SYNOPSIS DESCRIPTION RETURN VALUES ERRORS SEE ALSO STANDARDS This document was created by using the manual pages. Time: 11:58:03 GMT, March 24, 2025