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Command: fclose | Section: 3 | Source: FreeBSD | File: fclose.3.gz
FCLOSE(3) FreeBSD Library Functions Manual FCLOSE(3)
NAME
fclose, fdclose, fcloseall - close a stream
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <stdio.h>
int
fclose(FILE *stream);
int
fdclose(FILE *stream, int *fdp);
void
fcloseall(void);
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).
The fdclose() function is equivalent to fclose() except that it does not
close the underlying file descriptor. If fdp is not NULL, the file
descriptor will be written to it. If the fdp argument will be different
then NULL the file descriptor will be returned in it, If the stream does
not have an associated file descriptor, fdp will be set to -1. This type
of stream is created with functions such as fmemopen(3), funopen(3), or
open_memstream(3).
The fcloseall() function calls fclose() on all open streams.
RETURN VALUES
fcloseall() does not return a value.
Upon successful completion the fclose() and fdclose() functions return 0.
Otherwise, EOF is returned and the global variable errno is set to
indicate the error.
ERRORS
fdclose() fails if:
[EOPNOTSUPP] The stream does not have an associated file
descriptor.
The fclose() and fdclose() functions may also fail and set errno for any
of the errors specified for fflush(3).
The fclose() function may also fail and set errno for any of the errors
specified for close(2).
NOTES
The fclose() and fdclose() functions do not handle NULL arguments in the
stream variable; this will result in a segmentation violation. This is
intentional. It makes it easier to make sure programs written under
FreeBSD are bug free. This behaviour is an implementation detail, and
programs should not rely upon it.
SEE ALSO
close(2), fflush(3), fopen(3), setbuf(3)
STANDARDS
The fclose() function conforms to ISO/IEC 9899:1990 ("ISO C90").
HISTORY
The fcloseall() function first appeared in FreeBSD 7.0.
The fdclose() function first appeared in FreeBSD 11.0.
FreeBSD 14.1-RELEASE-p8 July 4, 2015 FreeBSD 14.1-RELEASE-p8