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Finish dup logic for open files; fix bug in sigtimedwait(), would return wrong signo value if the signal was already pending

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5517 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
2013-01-14 19:22:32 +00:00
parent 555e3fe1f5
commit 5a2eda210b
17 changed files with 333 additions and 102 deletions
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fs/nxffs/nxffs_open.c
+60 -2
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@@ -1,7 +1,7 @@
/****************************************************************************
* fs/nxffs/nxffs_open.c
*
* Copyright (C) 2011 Gregory Nutt. All rights reserved.
* Copyright (C) 2011, 2013 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* References: Linux/Documentation/filesystems/romfs.txt
@@ -1023,7 +1023,7 @@ int nxffs_open(FAR struct file *filep, FAR const char *relpath,
#endif
/* Limitation: A file must be opened for reading or writing, but not both.
* There is no general for extending the size of of a file. Extending the
* There is no general way of extending the size of a file. Extending the
* file size of possible if the file to be extended is the last in the
* sequence on FLASH, but since that case is not the general case, no file
* extension is supported.
@@ -1058,6 +1058,64 @@ int nxffs_open(FAR struct file *filep, FAR const char *relpath,
return ret;
}
/****************************************************************************
* Name: binfs_dup
*
* Description:
* Duplicate open file data in the new file structure.
*
****************************************************************************/
int nxffs_dup(FAR const struct file *oldp, FAR struct file *newp)
{
#ifdef CONFIG_DEBUG
FAR struct nxffs_volume_s *volume;
#endif
FAR struct nxffs_ofile_s *ofile;
fvdbg("Dup %p->%p\n", oldp, newp);
/* Sanity checks */
#ifdef CONFIG_DEBUG
DEBUGASSERT(oldp->f_priv == NULL && oldp->f_inode != NULL);
/* Get the mountpoint private data from the NuttX inode reference in the
* file structure
*/
volume = (FAR struct nxffs_volume_s*)oldp->f_inode->i_private;
DEBUGASSERT(volume != NULL);
#endif
/* Recover the open file state from the struct file instance */
ofile = (FAR struct nxffs_ofile_s *)oldp->f_priv;
/* I do not think we need exclusive access to the volume to do this.
* The volume exclsem protects the open file list and, hence, would
* assure that the ofile is stable. However, it is assumed that the
* caller holds a value file descriptor associated with this ofile,
* so it should be stable throughout the life of this function.
*/
/* Limitations: I do not think we have to be concerned about the
* usual NXFFS file limitations here: dup'ing cannot resulting
* in mixed reading and writing to the same file, or multiple
* writer to different file.
*
* I notice that nxffs_wropen will prohibit multiple opens for
* writing. But I do not thing that dup'ing a file already opened
* for writing suffers from any of these issues.
*/
/* Just increment the reference count on the ofile */
ofile->crefs++;
newp->f_priv = (FAR void *)ofile;
return OK;
}
/****************************************************************************
* Name: nxffs_close
*