Manpages - fclose.3

fclose - close a stream

  #include <stdio.h>

  int fclose(FILE *stream);

The *fclose*() function flushes the stream pointed to by stream (writing any buffered output data using *fflush*(3)) and closes the underlying file descriptor.

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

EBADF

The file descriptor 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).

For an explanation of the terms used in this section, see *attributes*(7).

POSIX.1-2001, POSIX.1-2008, C89, C99.

Note that *fclose*() flushes only 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, for example, with *sync*(2) or *fsync*(2).

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

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