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author | Gregory Nutt <gnutt@nuttx.org> | 2014-11-27 19:05:40 -0600 |
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committer | Gregory Nutt <gnutt@nuttx.org> | 2014-11-27 19:05:40 -0600 |
commit | cf7f554cb05f58e45e0fd9a013dd9b2ff170e000 (patch) | |
tree | 998c676cbe3aa9c4950c62dddeebe9ff1d29c0e0 /nuttx | |
parent | 6546300d9e248ebdc870d7e8d51badc3eb60e4b0 (diff) | |
download | px4-nuttx-cf7f554cb05f58e45e0fd9a013dd9b2ff170e000.tar.gz px4-nuttx-cf7f554cb05f58e45e0fd9a013dd9b2ff170e000.tar.bz2 px4-nuttx-cf7f554cb05f58e45e0fd9a013dd9b2ff170e000.zip |
Update TODO
Diffstat (limited to 'nuttx')
-rw-r--r-- | nuttx/TODO | 42 |
1 files changed, 40 insertions, 2 deletions
diff --git a/nuttx/TODO b/nuttx/TODO index 5475370f6..56f555da3 100644 --- a/nuttx/TODO +++ b/nuttx/TODO @@ -1,4 +1,4 @@ -NuttX TODO List (Last updated November 23, 2014) +NuttX TODO List (Last updated November 27, 2014) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ This file summarizes known NuttX bugs, limitations, inconsistencies with @@ -18,7 +18,7 @@ nuttx/ (13) Network (net/, drivers/net) (4) USB (drivers/usbdev, drivers/usbhost) (10) Libraries (libc/, ) - (11) File system/Generic drivers (fs/, drivers/) + (12) File system/Generic drivers (fs/, drivers/) (8) Graphics subystem (graphics/) (1) Pascal add-on (pcode/) (1) Documentation (Documentation/) @@ -1172,6 +1172,44 @@ o File system / Generic drivers (fs/, drivers/) Status: Open Priority: Medium + Title: IOCTL() IS NO LONGER STANDARD + Description: The function prototype for ioctl() is no longer standard. It + was more-or-less standard at one time. The NuttX ioctl is the + historic System 7 Unix, three-parameter version. + + int ioctl(int fd, int req, unsigned long arg); + + Current definitions now allow for the third parameter to be + optional (and, I suppose, could accept additional arguments). + For example, OpenGroup + (http://pubs.opengroup.org/onlinepubs/009695399/functions/ioctl.html): + + int ioctl(int fildes, int request, ... /* arg */); + + Linux man page: + + int ioctl(int d, unsigned long request, ...); + + FreeBSD: + + int ioctl(int fd, unsigned long request, ...); + + I imagine that making the thread argument variadic, the logic + is rescued for the case with modern 64-bit computers where + sizeof(long) < sizeof(pointer). + + Since NuttX relies on OpenGroup for interface definitions, the + current NuttX definition is incompatible with the standard in + any event. + + Unfortunately, the change would be very extensive. If the + type of the argument depends on the 'request', then the third + argument would have to be decoded by every device device + driver. That would be an enormous job and will not happen soon. + Status: Open + Priority: Very low until I run into a machine with sizeof(long) < + sizeof(pointer) + o Graphics subsystem (graphics/) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |