nuttx

History

Gregory Nutt 67ec3d7926 Remove CONFIG_CAN_PASS_STRUCT This commit resolves issue #620: Remove CONFIG_CAN_PASS_STRUCTS #620 The configuration option CONFIG_CAN_PASS_STRUCTS was added many years ago to support an old version of the SDCC compiler. That compiler is currently used only with the Z80 and Z180 targets. The limitation of that old compiler was that it could not pass structures or unions as either inputs or outputs. For example: #ifdef CONFIG_CAN_PASS_STRUCTS struct mallinfo mallinfo(void); #else int mallinfo(FAR struct mallinfo info); #endif And even leads to violation of a few POSIX interfaces like: #ifdef CONFIG_CAN_PASS_STRUCTS int sigqueue(int pid, int signo, union sigval value); #else int sigqueue(int pid, int signo, FAR void sival_ptr); #endif This breaks the 1st INVIOLABLES rule: Strict POSIX compliance ----------------------- o Strict conformance to the portable standard OS interface as defined at OpenGroup.org. o A deeply embedded system requires some special support. Special support must be minimized. o The portable interface must never be compromised only for the sake of expediency. o Expediency or even improved performance are not justifications for violation of the strict POSIX interface Also, it appears that the current SDCC compilers have resolve this issue and so, perhaps, this is no longer a problem: z88dk/z88dk#1132 NOTE: This commit cannot pass the PR checks because it depends on matching changes to the apps/ directory.		2020-04-11 21:19:47 +01:00
..
fs_procfs.c	Run codespell -w with the latest dictonary again	2020-02-23 22:27:46 +01:00
fs_procfscpuload.c	tools/nxstyle.c: Fix a rare false alarm that could occur if a variable or function name begins with the sub-string 'union' or 'struct'. misc fixes under fs/ and sched/ from application of current version of nxstyle.	2019-12-01 13:01:16 -06:00
fs_procfscritmon.c
fs_procfsiobinfo.c	Make the read ahead buffer unselectable	2020-01-11 08:24:49 -06:00
fs_procfsmeminfo.c	Remove CONFIG_CAN_PASS_STRUCT	2020-04-11 21:19:47 +01:00
fs_procfsproc.c	Fix wait loop and void cast (#24 )	2020-01-02 10:54:43 -06:00
fs_procfsuptime.c	tools/nxstyle.c: Fix a rare false alarm that could occur if a variable or function name begins with the sub-string 'union' or 'struct'. misc fixes under fs/ and sched/ from application of current version of nxstyle.	2019-12-01 13:01:16 -06:00
fs_procfsutil.c
fs_procfsversion.c	Remove exra whitespace from files (#189 )	2020-01-31 09:24:49 -06:00
fs_skeleton.c	Run codespell -w with the latest dictonary again	2020-02-23 22:27:46 +01:00
Kconfig	fs/: Remove support for CONFIG_FS_READABLE	2020-03-22 08:24:07 -05:00
Make.defs	Merged in antmerlino/nuttx/iobinstrumentation (pull request #1001 )	2019-08-16 22:42:25 +00:00
README.txt	Remove 'executable' bit on several files	2019-08-01 14:13:55 -06:00

README.txt

fs/procfs README
================

  This is a tiny procfs file system that allows read-only access to a few
  attributes of a task or thread.  This tiny procfs fs file system can be
  built into the system by enabling:

    CONFIG_FS_PROCFS=y

  It can then be mounted from the NSH command like like:

    nsh> mount -t procfs /proc

Example
=======

  NuttShell (NSH) NuttX-6.31
  nsh> mount -t procfs /proc

  nsh> ls /proc
  /proc:
   0/
   1/

  nsh> ls /proc/1
  /proc/1:
   status
   cmdline

  nsh> cat /proc/1/status
  Name:       init
  Type:       Task
  State:      Running
  Priority:   100
  Scheduler:  SCHED_FIFO
  SigMask:    00000000

  nsh> cat /proc/1/cmdline
  init

  nsh> sleep 100 &
  sleep [2:100]
  nsh> ls /proc
  ls /proc
  /proc:
   0/
   1/
   2/

  nsh> cat /proc/2/cmdline
  <pthread> 0x527420