First quick stab at organizing TODO under whose TODO item it is.
This commit is contained in:
Rob Landley
parent
80b8ff07ca
commit
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197
TODO
197
TODO
@ -1,28 +1,111 @@
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Busybox TODO
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Stuff that needs to be done. All of this is fair game for 1.2.
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Stuff that needs to be done. This is organized by who plans to get around to
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doing it eventually, but that doesn't mean they "own" the item. If you want to
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do one of these bounce an email off the person it's listed under to see if they
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have any suggestions how they plan to go about it, and to minimize conflicts
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between your work and theirs. But otherwise, all of these are fair game.
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Rob Landley <rob@landley.net>:
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Migrate calloc() and bb_calloc() occurrences to bb_xzalloc().
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Remove obsolete _() wrapper crud for internationalization we don't do.
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Figure out where we need utf8 support, and add it.
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build system
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make -j is broken, -j1 is forced atm
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Make sure that the flags get pinned in e.g. Rules.mak so when expanding them
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later on you get the cached result without the need to re-evaluate them.
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----
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find
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doesn't understand (), lots of susv3 stuff.
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----
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sh
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The command shell situation is a big mess. We have three or four different
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shells that don't really share any code, and the "standalone shell" doesn't
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work all that well (especially not in a chroot environment), due to apps not
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being reentrant. Unifying the various shells and figuring out a configurable
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way of adding the minimal set of bash features a given script uses is a big
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job, but it would be a big improvement.
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being reentrant. I'm writing a new shell (bbsh) to unify the various
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shells and configurably add the minimal set of bash features people
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actually use. The hardest part is it has to configure down as small as
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lash while providing lash's features. The rest is easy in comparison.
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bzip2
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Compression-side support.
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init
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General cleanup.
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Unify base64 handling.
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There's base64 encoding and decoding going on in:
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networking/wget.c:base64enc()
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coreutils/uudecode.c:read_base64()
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coreutils/uuencode.c:tbl_base64[]
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networking/httpd.c:decodeBase64()
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And probably elsewhere. That needs to be unified into libbb functions.
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Do a SUSv3 audit
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Look at the full Single Unix Specification version 3 (available online at
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"http://www.opengroup.org/onlinepubs/009695399/nfindex.html") and
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figure out which of our apps are compliant, and what we're missing that
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we might actually care about.
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Note: Rob Landley (rob@landley.net) is working on a new unified shell called
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bbsh, but it's a low priority...
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---
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Even better would be some kind of automated compliance test harness that
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exercises each command line option and the various corner cases.
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Internationalization
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How much internationalization should we do?
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The low hanging fruit is UTF-8 character set support. We should do this.
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(Vodz pointed out the shell's cmdedit as needing work here. What else?)
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We also have lots of hardwired english text messages. Consolidating this
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into some kind of message table not only makes translation easier, but
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also allows us to consolidate redundant (or close) strings.
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We probably don't want to be bloated with locale support. (Not unless we
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can cleanly export it from our underlying C library without having to
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concern ourselves with it directly. Perhaps a few specific things like a
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config option for "date" are low hanging fruit here?)
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What level should things happen at? How much do we care about
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internationalizing the text console when X11 and xterms are so much better
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at it? (There's some infrastructure here we don't implement: The
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"unicode_start" and "unicode_stop" shell scripts need "vt-is-UTF8" and a
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--unicode option to loadkeys. That implies a real loadkeys/dumpkeys
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implementation to replace loadkmap/dumpkmap. Plus messing with console font
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loading. Is it worth it, or do we just say "use X"?)
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Individual compilation of applets.
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It would be nice if busybox had the option to compile to individual applets,
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for people who want an alternate implementation less bloated than the gnu
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utils (or simply with less political baggage), but without it being one big
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executable.
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Turning libbb into a real dll is another possibility, especially if libbb
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could export some of the other library interfaces we've already more or less
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got the code for (like zlib).
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buildroot - Make a "dogfood" option
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Busybox 1.1 will be capable of replacing most gnu packages for real world
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use, such as developing software or in a live CD. It needs wider testing.
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Busybox should now be able to replace bzip2, coreutils, e2fsprogs, file,
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findutils, gawk, grep, inetutils, less, modutils, net-tools, patch, procps,
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sed, shadow, sysklogd, sysvinit, tar, util-linux, and vim. The resulting
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system should be self-hosting (I.E. able to rebuild itself from source
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code). This means it would need (at least) binutils, gcc, and make, or
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equivalents.
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It would be a good "eating our own dogfood" test if buildroot had the option
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of using a "make allyesconfig" busybox instead of the all of the above
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packages. Anything that's wrong with the resulting system, we can fix. (It
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would be nice to be able to upgrade busybox to be able to replace bash and
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diffutils as well, but we're not there yet.)
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One example of an existing system that does this already is Firmware Linux:
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http://www.landley.net/code/firmware
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initramfs
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Busybox should have a sample initramfs build script. This depends on
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bbsh, mdev, and switch_root.
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Bernhard Fischer <rep.nop@anon.at>:
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Makefile stuff:
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make -j is broken, -j1 is forced atm
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As yet unclaimed:
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----
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find
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doesn't understand (), lots of susv3 stuff.
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----
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diff
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Also, make sure we handle empty files properly:
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Make sure we handle empty files properly:
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From the patch man page:
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you can remove a file by sending out a context diff that compares
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@ -45,18 +128,9 @@ man
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(How doclifter might work into this is anybody's guess.)
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---
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bzip2
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Compression-side support.
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---
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init
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General cleanup.
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---
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ar
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Write support?
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---
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mdev
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Micro-udev.
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---
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crond
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turn FEATURE_DEBUG_OPT into ENABLE_FEATURE_CROND_DEBUG_OPT
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@ -74,46 +148,6 @@ bb_close() with fsync()
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You need to call fsync() if you care about errors that occur after write(),
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but that can have a big performance impact. So make it a config option.
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---
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Unify base64 handling.
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There's base64 encoding and decoding going on in:
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networking/wget.c:base64enc()
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coreutils/uudecode.c:read_base64()
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coreutils/uuencode.c:tbl_base64[]
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networking/httpd.c:decodeBase64()
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And probably elsewhere. That needs to be unified into libbb functions.
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---
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Do a SUSv3 audit
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Look at the full Single Unix Specification version 3 (available online at
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"http://www.opengroup.org/onlinepubs/009695399/nfindex.html") and
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figure out which of our apps are compliant, and what we're missing that
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we might actually care about.
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Even better would be some kind of automated compliance test harness that
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exercises each command line option and the various corner cases.
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---
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Internationalization
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How much internationalization should we do?
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The low hanging fruit is UTF-8 character set support. We should do this.
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(Vodz pointed out the shell's cmdedit as needing work here. What else?)
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We also have lots of hardwired english text messages. Consolidating this
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into some kind of message table not only makes translation easier, but
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also allows us to consolidate redundant (or close) strings.
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We probably don't want to be bloated with locale support. (Not unless we can
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cleanly export it from our underlying C library without having to concern
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ourselves with it directly. Perhaps a few specific things like a config
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option for "date" are low hanging fruit here?)
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What level should things happen at? How much do we care about
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internationalizing the text console when X11 and xterms are so much better
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at it? (There's some infrastructure here we don't implement: The
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"unicode_start" and "unicode_stop" shell scripts need "vt-is-UTF8" and a
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--unicode option to loadkeys. That implies a real loadkeys/dumpkeys
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implementation to replace loadkmap/dumpkmap. Plus messing with console font
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loading. Is it worth it, or do we just say "use X"?)
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---
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Unify archivers
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Lots of archivers have the same general infrastructure. The directory
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traversal code should be factored out, and the guts of each archiver could
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@ -129,39 +163,6 @@ Text buffer support.
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a whole file into memory and act on it. There might be an opportunity
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for shared code in there that could be moved into libbb...
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---
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Individual compilation of applets.
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It would be nice if busybox had the option to compile to individual applets,
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for people who want an alternate implementation less bloated than the gnu
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utils (or simply with less political baggage), but without it being one big
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executable.
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Turning libbb into a real dll is another possibility, especially if libbb
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could export some of the other library interfaces we've already more or less
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got the code for (like zlib).
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---
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buildroot - Make a "dogfood" option
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Busybox 1.1 will be capable of replacing most gnu packages for real world use,
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such as developing software or in a live CD. It needs wider testing.
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Busybox should now be able to replace bzip2, coreutils, e2fsprogs, file,
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findutils, gawk, grep, inetutils, less, modutils, net-tools, patch, procps,
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sed, shadow, sysklogd, sysvinit, tar, util-linux, and vim. The resulting
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system should be self-hosting (I.E. able to rebuild itself from source code).
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This means it would need (at least) binutils, gcc, and make, or equivalents.
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It would be a good "eating our own dogfood" test if buildroot had the option
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of using a "make allyesconfig" busybox instead of the all of the above
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packages. Anything that's wrong with the resulting system, we can fix. (It
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would be nice to be able to upgrade busybox to be able to replace bash and
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diffutils as well, but we're not there yet.)
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One example of an existing system that does this already is Firmware Linux:
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http://www.landley.net/code/firmware
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---
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initramfs
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Busybox should have a sample initramfs build script. This depends on
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bbsh, mdev, and switch_root.
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---
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Memory Allocation
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We have a CONFIG_BUFFER mechanism that lets us select whether to do memory
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allocation on the stack or the heap. Unfortunately, we're not using it much.
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