1FCLOSE(P) POSIX Programmer's Manual FCLOSE(P)
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6 fclose - close a stream
7
9 #include <stdio.h>
10 int fclose(FILE *stream);
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15 The fclose() function shall cause the stream pointed to by stream to be
16 flushed and the associated file to be closed. Any unwritten buffered
17 data for the stream shall be written to the file; any unread buffered
18 data shall be discarded. Whether or not the call succeeds, the stream
19 shall be disassociated from the file and any buffer set by the setbuf()
20 or setvbuf() function shall be disassociated from the stream. If the
21 associated buffer was automatically allocated, it shall be deallocated.
22 The fclose() function shall mark for update the st_ctime and st_mtime
24 fields of the underlying file, if the stream was writable, and if
25 buffered data remains that has not yet been written to the file. The
26 fclose() function shall perform the equivalent of a close() on the file
27 descriptor that is associated with the stream pointed to by stream.
28 After the call to fclose(), any use of stream results in undefined
30 behavior.
31
33 Upon successful completion, fclose() shall return 0; otherwise, it
34 shall return EOF and set errno to indicate the error.
35
37 The fclose() function shall fail if:
38 EAGAIN The O_NONBLOCK flag is set for the file descriptor underlying
40 stream and the process would be delayed in the write operation.
41 EBADF The file descriptor underlying stream is not valid.
43 EFBIG An attempt was made to write a file that exceeds the maximum
45 file size.
46 EFBIG An attempt was made to write a file that exceeds the process'
48 file size limit.
49 EFBIG The file is a regular file and an attempt was made to write at
51 or beyond the offset maximum associated with the corresponding
52 stream.
53 EINTR The fclose() function was interrupted by a signal.
55 EIO The process is a member of a background process group attempting
57 to write to its controlling terminal, TOSTOP is set, the process
58 is neither ignoring nor blocking SIGTTOU, and the process group
59 of the process is orphaned. This error may also be returned
60 under implementation-defined conditions.
61 ENOSPC There was no free space remaining on the device containing the
63 file.
64 EPIPE An attempt is made to write to a pipe or FIFO that is not open
66 for reading by any process. A SIGPIPE signal shall also be sent
67 to the thread.
68 The fclose() function may fail if:
71 ENXIO A request was made of a nonexistent device, or the request was
73 outside the capabilities of the device.
74 The following sections are informative.
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79 None.
80
82 None.
83
85 None.
86
88 None.
89
91 close() , fopen() , getrlimit() , ulimit() , the Base Definitions vol‐
92 ume of IEEE Std 1003.1-2001, <stdio.h>
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95 Portions of this text are reprinted and reproduced in electronic form
96 from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
97 -- Portable Operating System Interface (POSIX), The Open Group Base
98 Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
99 Electrical and Electronics Engineers, Inc and The Open Group. In the
100 event of any discrepancy between this version and the original IEEE and
101 The Open Group Standard, the original IEEE and The Open Group Standard
102 is the referee document. The original Standard can be obtained online
103 at http://www.opengroup.org/unix/online.html .
104IEEE/The Open Group 2003 FCLOSE(P)