fclose(3)

1FCLOSE(3)                  Linux Programmer's Manual                 FCLOSE(3)
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NAME

6       fclose - close a stream
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SYNOPSIS

9       #include <stdio.h>
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11       int fclose(FILE *fp);
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DESCRIPTION

14       The  fclose()  function will flush the stream pointed to by fp (writing
15       any buffered output data using fflush(3)) and close the underlying file
16       descriptor.
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RETURN VALUE

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

25       EBADF  The file descriptor underlying fp is not valid.
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27       The fclose() function may also fail and set errno for any of the errors
28       specified for the routines close(2), write(2) or fflush(3).
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NOTES

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

36       C89, C99.
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