Why we didn't take a watchdog.c suggestion this time 'round, in case anybody

comes up with a fix...
This commit is contained in:
Rob Landley 2006-01-09 00:54:46 +00:00
parent e87ae0bd4f
commit 8bcc6e964b

45
TODO
View File

@ -1,6 +1,6 @@
Busybox TODO Busybox TODO
Stuff that needs to be done Stuff that needs to be done. All of this is fair game for 1.2.
find find
doesn't understand (), lots of susv3 stuff. doesn't understand (), lots of susv3 stuff.
@ -13,11 +13,20 @@ sh
way of adding the minimal set of bash features a given script uses is a big way of adding the minimal set of bash features a given script uses is a big
job, but it would be a big improvement. job, but it would be a big improvement.
Note: Rob Landley (rob@landley.net) is working on this one, but very slowly... Note: Rob Landley (rob@landley.net) is working on a new unified shell called
bbsh, but it's a low priority...
--- ---
diff diff
We should have a diff -u command. We have patch, we should have diff We should have a diff -u command. We have patch, we should have diff
(we only need to support unified diffs though). (we only need to support unified diffs though).
Also, make sure we handle empty files properly:
From the patch man page:
   you can remove a file by sending out a context diff that compares
   the file to be deleted with an empty file dated the Epoch.  The
   file will be removed unless patch is conforming to POSIX and the
   -E or --remove-empty-files option is not given.
--- ---
patch patch
Should have simple fuzz factor support to apply patches at an offset which Should have simple fuzz factor support to apply patches at an offset which
@ -31,12 +40,20 @@ man
anything, just one that can handle preformatted ascii man pages, possibly anything, just one that can handle preformatted ascii man pages, possibly
compressed. This could probably be a script in the extras directory that compressed. This could probably be a script in the extras directory that
calls cat/zcat/bzcat | less calls cat/zcat/bzcat | less
(How doclifter might work into this is anybody's guess.)
--- ---
bzip2 bzip2
Compression-side support. Compression-side support.
--- ---
init init
General cleanup. General cleanup.
---
ar
Write support?
---
mdev
Micro-udev.
Architectural issues: Architectural issues:
@ -44,9 +61,11 @@ bb_close() with fsync()
We should have a bb_close() in place of normal close, with a CONFIG_ option We should have a bb_close() in place of normal close, with a CONFIG_ option
to not just check the return value of close() for an error, but fsync(). to not just check the return value of close() for an error, but fsync().
Close can't reliably report anything useful because if write() accepted the Close can't reliably report anything useful because if write() accepted the
data then it either went out or it's in cache or a pipe buffer. Either way, data then it either went out to the network or it's in cache or a pipe
there's no guarantee it'll make it to its final destination before close() buffer. Either way, there's no guarantee it'll make it to its final
gets called, so there's no guarantee that any error will be reported. destination before close() gets called, so there's no guarantee that any
error will be reported.
You need to call fsync() if you care about errors that occur after write(), You need to call fsync() if you care about errors that occur after write(),
but that can have a big performance impact. So make it a config option. but that can have a big performance impact. So make it a config option.
--- ---
@ -89,8 +108,8 @@ Unify archivers
"add this directory", "add this symlink" and so on. "add this directory", "add this symlink" and so on.
This could clean up tar and zip, and make it cheaper to add cpio and ar This could clean up tar and zip, and make it cheaper to add cpio and ar
write support, and possibly even cheaply add things like mkisofs someday, write support, and possibly even cheaply add things like mkisofs or
if it becomes relevant. mksquashfs someday, if they become relevant.
--- ---
Text buffer support. Text buffer support.
Several existing applets (sort, vi, less...) read Several existing applets (sort, vi, less...) read
@ -126,6 +145,10 @@ buildroot - Make a "dogfood" option
One example of an existing system that does this already is Firmware Linux: One example of an existing system that does this already is Firmware Linux:
http://www.landley.net/code/firmware http://www.landley.net/code/firmware
--- ---
initramfs
Busybox should have a sample initramfs build script. This depends on
involves bbsh, mdev, and switch_root.
---
Memory Allocation Memory Allocation
We have a CONFIG_BUFFER mechanism that lets us select whether to do memory We have a CONFIG_BUFFER mechanism that lets us select whether to do memory
allocation on the stack or the heap. Unfortunately, we're not using it much. allocation on the stack or the heap. Unfortunately, we're not using it much.
@ -202,3 +225,11 @@ FEATURE_CLEAN_UP
render the existing FEATURE_CLEAN_UP code redundant. render the existing FEATURE_CLEAN_UP code redundant.
For right now, exit() handles it just fine. For right now, exit() handles it just fine.
Minor stuff:
watchdog.c could autodetect the timer duration via:
if(!ioctl (fd, WDIOC_GETTIMEOUT, &tmo)) timer_duration = 1 + (tmo / 2);
Unfortunately, that needs linux/watchdog.h and that contains unfiltered
kernel types on some distros, which breaks the build.