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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-02-06 01:29:23 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-02-06 01:29:23 +0000 |
commit | a26dad80f4d004a4a0f6effedc803b3902389b39 (patch) | |
tree | 419248121e228b55362eb1b9b2b98a85e3d96c4c /nuttx/lib/lib_libflushall.c | |
parent | c58518aeb7694de1e53d17f228cb84c401e82bb4 (diff) | |
download | px4-nuttx-a26dad80f4d004a4a0f6effedc803b3902389b39.tar.gz px4-nuttx-a26dad80f4d004a4a0f6effedc803b3902389b39.tar.bz2 px4-nuttx-a26dad80f4d004a4a0f6effedc803b3902389b39.zip |
fflush(NULL) returns error
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@636 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/lib/lib_libflushall.c')
-rw-r--r-- | nuttx/lib/lib_libflushall.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/nuttx/lib/lib_libflushall.c b/nuttx/lib/lib_libflushall.c new file mode 100644 index 000000000..7ba72dc7a --- /dev/null +++ b/nuttx/lib/lib_libflushall.c @@ -0,0 +1,140 @@ +/**************************************************************************** + * lib/lib_libflushall.c + * + * Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Compilation Switches + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <sys/types.h> +#include <fcntl.h> +#include <errno.h> + +#include <nuttx/fs.h> + +#include "lib_internal.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Type Declarations + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Global Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Global Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Private Variables + ****************************************************************************/ + +/**************************************************************************** + * Global Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: lib_flushall + * + * Description: + * Called either (1) by the OS when a task exits, or (2) from fflush() + * when a NULL stream argument is provided. + * + ****************************************************************************/ + +int lib_flushall(FAR struct streamlist *list) +{ + int lasterrno = OK; + int ret; + + /* Make sure that there are streams associated with this thread */ + + if (list) + { + int i; + + /* Process each stream in the thread's stream list */ + + stream_semtake(list); + for (i = 0; i < CONFIG_NFILE_STREAMS; i++) + { + FILE *stream = &list->sl_streams[i]; + + /* If the stream is open (i.e., assigned a non-negative file + * descriptor) and opened for writing, then flush all of the pending + * write data in the stream. + */ + + if (stream->fs_filedes >= 0 && (stream->fs_oflags & O_WROK) != 0) + { + /* Flush the writable FILE */ + + if (lib_fflush(stream, TRUE) != 0) + { + /* An error occurred during the flush AND/OR we were unable + * to flush all of the buffered write data. Return EOF on failure. + */ + + lasterrno = *get_errno_ptr(); + ret = ERROR; + } + } + } + stream_semgive(list); + } + + /* If any flush failed, return that last failed flush */ + + *get_errno_ptr() = lasterrno; + return ret; +} |