1fclose(3C) Standard C Library Functions fclose(3C)
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6 fclose - close a stream
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9 #include <stdio.h>
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11 int fclose(FILE *stream);
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15 The fclose() function causes 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 is written to the file; any unread buffered data is
18 discarded. The stream is disassociated from the file. If the associated
19 buffer was automatically allocated, it is deallocated.
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22 The fclose() function marks for update the st_ctime and st_mtime fields
23 of the underlying file if the stream is writable and if buffered data
24 has not yet been written to the file. It will perform a close(2) oper‐
25 ation on the file descriptor that is associated with the stream pointed
26 to by stream.
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29 After the call to fclose(), any use of stream causes undefined behav‐
30 ior.
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33 The fclose() function is performed automatically for all open files
34 upon calling exit(2).
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37 Upon successful completion, fclose() returns 0. Otherwise, it returns
38 EOF and sets errno to indicate the error.
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41 The fclose() function will fail if:
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43 EAGAIN The O_NONBLOCK flag is set for the file descriptor underlying
44 stream and the process would be delayed in the write opera‐
45 tion.
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48 EBADF The file descriptor underlying stream is not valid.
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51 EFBIG An attempt was made to write a file that exceeds the maximum
52 file size or the process's file size limit; or the file is a
53 regular file and an attempt was made to write at or beyond
54 the offset maximum associated with the corresponding stream.
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57 EINTR The fclose() function was interrupted by a signal.
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60 EIO The process is a member of a background process group
61 attempting to write to its controlling terminal, TOSTOP is
62 set, the process is neither ignoring nor blocking SIGTTOU and
63 the process group of the process is orphaned.
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66 ENOSPC There was no free space remaining on the device containing
67 the file.
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70 EPIPE An attempt is made to write to a pipe or FIFO that is not
71 open for reading by any process. A SIGPIPE signal will also
72 be sent to the calling thread.
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76 The fclose() function may fail if:
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78 ENXIO A request was made of a non-existent device, or the request
79 was beyond the limits of the device.
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83 See attributes(5) for descriptions of the following attributes:
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88 ┌─────────────────────────────┬─────────────────────────────┐
89 │ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
90 ├─────────────────────────────┼─────────────────────────────┤
91 │Interface Stability │Standard │
92 ├─────────────────────────────┼─────────────────────────────┤
93 │MT-Level │MT-Safe │
94 └─────────────────────────────┴─────────────────────────────┘
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97 close(2), exit(2), getrlimit(2), ulimit(2), fopen(3C), stdio(3C),
98 attributes(5), standards(5)
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102SunOS 5.11 1 Nov 2003 fclose(3C)