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).
| Interface |
Attribute |
Value |
| fclose () |
Thread safety |
MT-Safe |
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)