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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2011-05-13 14:39:59 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2011-05-13 14:39:59 +0000 |
commit | 93722421fea0a6a7d5f3dbd74c0e5f7335b9f697 (patch) | |
tree | 54b8439111db7f7e0d9b7de68bc36a8c41993fc6 /nuttx/lib | |
parent | 92150c020c6ea250146d8eb82bb51fb9c1605125 (diff) | |
download | px4-nuttx-93722421fea0a6a7d5f3dbd74c0e5f7335b9f697.tar.gz px4-nuttx-93722421fea0a6a7d5f3dbd74c0e5f7335b9f697.tar.bz2 px4-nuttx-93722421fea0a6a7d5f3dbd74c0e5f7335b9f697.zip |
fclose() was not flushing buffered data
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3603 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/lib')
-rw-r--r-- | nuttx/lib/stdio/lib_fclose.c | 59 |
1 files changed, 55 insertions, 4 deletions
diff --git a/nuttx/lib/stdio/lib_fclose.c b/nuttx/lib/stdio/lib_fclose.c index 8d53b387b..06f970e11 100644 --- a/nuttx/lib/stdio/lib_fclose.c +++ b/nuttx/lib/stdio/lib_fclose.c @@ -50,14 +50,53 @@ * Global Functions ****************************************************************************/ +/**************************************************************************** + * Name: fclose + * + * Description + * The fclose() function will flush the stream pointed to by stream + * (writing any buffered output data using lib_fflush()) and close the + * underlying file descriptor. + * + * Returned Value: + * Upon successful completion 0 is returned. Otherwise, EOF is returned + * and the global variable errno is set to indicate the error. In either + * case any further access (including another call to fclose()) to the + * stream results in undefined behaviour. + * + ****************************************************************************/ + int fclose(FAR FILE *stream) { - int ret = OK; + int err = EINVAL; + int ret = ERROR; + + /* Verify that a stream was provided. */ + if (stream) { + /* Flush the stream */ + + ret = lib_fflush(stream, true); + err = errno; + + /* Close the underlying file descriptor */ + if (stream->fs_filedes > 0) { - ret = close(stream->fs_filedes); + /* Close the file and save the return status */ + + int status = close(stream->fs_filedes); + + /* If close() returns an error but flush() did not then make + * sure that we return the close() error condition. + */ + + if (ret == 0) + { + ret = status; + err = errno; + } } #if CONFIG_STDIO_BUFFER_SIZE > 0 @@ -65,7 +104,7 @@ int fclose(FAR FILE *stream) sem_destroy(&stream->fs_sem); - /* release the buffer */ + /* Release the buffer */ if (stream->fs_bufstart) { @@ -90,6 +129,18 @@ int fclose(FAR FILE *stream) stream->fs_filedes = -1; } - return ret; + /* On an error, reset the errno to the first error encountered and return + * EOF. + */ + + if (ret != OK) + { + set_errno(err); + return EOF; + } + + /* Return success */ + + return OK; } |