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fclose(3c)
Standard C Library Functions fclose(3C)
NAME
fclose, fcloseall - close a stream
SYNOPSIS
#include <stdio.h>
int fclose(FILE *stream);
int fcloseall(void);
DESCRIPTION
The fclose() function causes the stream pointed to by stream to be
flushed and the associated file to be closed. Any unwritten buffered
data for the stream is written to the file; any unread buffered data is
discarded. The stream is disassociated from the file. If the associated
buffer was automatically allocated, it is deallocated.
The fclose() function marks for update the st_ctime and st_mtime fields
of the underlying file if the stream is writable and if buffered data
has not yet been written to the file. It will perform a close(2) opera‐
tion on the file descriptor that is associated with the stream pointed
to by stream.
After the call to fclose(), any use of stream causes undefined behav‐
ior.
The fclose() function is performed automatically for all open files
upon calling exit(2).
The fcloseall() function calls fclose() on all open streams.
RETURN VALUES
Upon successful completion, 0 is returned. Otherwise, EOF is returned
and errno is set to indicate the error.
ERRORS
The fclose() function will fail if:
EAGAIN The O_NONBLOCK flag is set for the file descriptor underlying
stream and the process would be delayed in the write opera‐
tion.
EBADF The file descriptor underlying stream is not valid.
EFBIG An attempt was made to write a file that exceeds the maximum
file size or the process's file size limit; or the file is a
regular file and an attempt was made to write at or beyond
the offset maximum associated with the corresponding stream.
EINTR The fclose() function was interrupted by a signal.
EIO The process is a member of a background process group
attempting to write to its controlling terminal, TOSTOP is
set, the process is neither ignoring nor blocking SIGTTOU and
the process group of the process is orphaned.
ENOSPC There was no free space remaining on the device containing
the file.
EPIPE An attempt is made to write to a pipe or FIFO that is not
open for reading by any process. A SIGPIPE signal will also
be sent to the calling thread.
The fclose() function may fail if:
ENXIO A request was made of a non-existent device, or the request
was beyond the limits of the device.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ Interface StabilityCommitted _ MT-LevelMT-Safe _ Stan‐
dardSee standards(7).
SEE ALSO
close(2), exit(2), getrlimit(2), ulimit(2), fopen(3C), stdio(3C),
attributes(7), standards(7)
Oracle Solaris 11.4 22 Feb 2021 fclose(3C)