91d7ee31f
Denys Vlasenko
2010-06-19
Subject
tweak TODO file
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TODO+10 -108
| @@ -1,5 +1,8 @@ | |
| Busybox TODO | |
| + | Harvest patches from |
| + | http://git.openembedded.org/cgit.cgi/openembedded/tree/recipes/busybox/ |
| + | |
| Stuff that needs to be done. This is organized by who plans to get around to | |
| doing it eventually, but that doesn't mean they "own" the item. If you want to | |
| do one of these bounce an email off the person it's listed under to see if they | |
| @@ -9,9 +12,6 @@ between your work and theirs. But otherwise, all of these are fair game. | |
| Rob Landley suggested this: | |
| Implement bb_realpath() that can handle NULL on non-glibc. | |
| - | Remove obsolete _() wrapper crud for internationalization we don't do. |
| - | Figure out where we need utf8 support, and add it. |
| - | |
| sh | |
| The command shell situation is a mess. We have two different | |
| shells that don't really share any code, and the "standalone shell" doesn't | |
| @@ -31,7 +31,7 @@ Rob Landley suggested this: | |
| How much internationalization should we do? | |
| The low hanging fruit is UTF-8 character set support. We should do this. | |
| - | (Vodz pointed out the shell's cmdedit as needing work here. What else?) |
| + | See TODO_unicode file. |
| We also have lots of hardwired english text messages. Consolidating this | |
| into some kind of message table not only makes translation easier, but | |
| @@ -59,6 +59,7 @@ Rob Landley suggested this: | |
| Turning libbb into a real dll is another possibility, especially if libbb | |
| could export some of the other library interfaces we've already more or less | |
| got the code for (like zlib). | |
| + | |
| buildroot - Make a "dogfood" option | |
| Busybox 1.1 will be capable of replacing most gnu packages for real world | |
| use, such as developing software or in a live CD. It needs wider testing. | |
| @@ -78,22 +79,25 @@ Rob Landley suggested this: | |
| One example of an existing system that does this already is Firmware Linux: | |
| http://www.landley.net/code/firmware | |
| + | |
| initramfs | |
| Busybox should have a sample initramfs build script. This depends on | |
| bbsh, mdev, and switch_root. | |
| + | |
| mkdep | |
| Write a mkdep that doesn't segfault if there's a directory it doesn't | |
| have permission to read, isn't based on manually editing the output of | |
| lexx and yacc, doesn't make such a mess under include/config, etc. | |
| + | |
| Group globals into unions of structures. | |
| Go through and turn all the global and static variables into structures, | |
| and have all those structures be in a big union shared between processes, | |
| so busybox uses less bss. (This is a big win on nommu machines.) See | |
| sed.c and mdev.c for examples. | |
| + | |
| Go through bugs.busybox.net and close out all of that somehow. | |
| This one's open to everybody, but I'll wind up doing it... | |
| - | |
| Bernhard Reutner-Fischer <[email protected]> suggests to look at these: | |
| New debug options: | |
| -Wlarger-than-127 | |
| @@ -177,40 +181,6 @@ Memory Allocation | |
| call free might also be optimized out by the compiler if written right, so | |
| we can yank those #ifdefs too, and generally clean up the code. | |
| --- | |
| - | Switch CONFIG_SYMBOLS to ENABLE_SYMBOLS |
| - | |
| - | In busybox 1.0 and earlier, configuration was done by CONFIG_SYMBOLS |
| - | that were either defined or undefined to indicate whether the symbol was |
| - | selected in the .config file. They were used with #ifdefs, ala: |
| - | |
| - | #ifdef CONFIG_SYMBOL |
| - | if (other_test) { |
| - | do_code(); |
| - | } |
| - | #endif |
| - | |
| - | In 1.1, we have new ENABLE_SYMBOLS which are always defined (as 0 or 1), |
| - | meaning you can still use them for preprocessor tests by replacing |
| - | "#ifdef CONFIG_SYMBOL" with "#if ENABLE_SYMBOL". But more importantly, we |
| - | can use them as a true or false test in normal C code: |
| - | |
| - | if (ENABLE_SYMBOL && other_test) { |
| - | do_code(); |
| - | } |
| - | |
| - | (Optimizing away if() statements that resolve to a constant value |
| - | is known as "dead code elimination", an optimization so old and simple that |
| - | Turbo Pascal for DOS did it twenty years ago. Even modern mini-compilers |
| - | like the Tiny C Compiler (tcc) and the Small Device C Compiler (SDCC) |
| - | perform dead code elimination.) |
| - | |
| - | Right now, busybox.h is #including both "config.h" (defining the |
| - | CONFIG_SYMBOLS) and "bb_config.h" (defining the ENABLE_SYMBOLS). At some |
| - | point in the future, it would be nice to wean ourselves off of the |
| - | CONFIG versions. (Among other things, some defective build environments |
| - | leak the Linux kernel's CONFIG_SYMBOLS into the system's standard #include |
| - | files. We've experienced collisions before.) |
| - | --- |
| FEATURE_CLEAN_UP | |
| This is more an unresolved issue than a to-do item. More thought is needed. | |
| @@ -266,12 +236,7 @@ Minor stuff: | |
| --- | |
| unify progress_meter. wget, flash_eraseall, pipe_progress, fbsplash, setfiles. | |
| --- | |
| - | support start-stop-daemon -d <chdir-path> |
| - | |
| - | Code cleanup: |
| - | |
| - | Replace deprecated functions. |
| - | |
| + | support start-stop-daemon -d <chdir-path> |
| --- | |
| vdprintf() -> similar sized functionality | |
| --- | |
| @@ -296,8 +261,6 @@ vdprintf() -> similar sized functionality | |
| The first step would to generate a file/matrix what is already archived | |
| (also IPV6) | |
| - | * ntpdate/ntpd (see ntpclient and openntp for examples) |
| - | |
| * implement 'at' | |
| * rpcbind (former portmap) or equivalent | |
| @@ -311,64 +274,3 @@ vdprintf() -> similar sized functionality | |
| most likely there is more | |
| * even more support for statistics: mpstat, iostat, powertop.... | |
| - | |
| - | |
| - | Unicode work needed: |
| - | |
| - | Unicode support uses libc multibyte functions if LOCALE_SUPPORT is on |
| - | (in this case, the code will also support many more encodings), |
| - | or uses a limited subset of re-implemented multibyte functions |
| - | which only understand "one byte == one char" and unicode. |
| - | This is useful if you build against uclibc with locale support disabled. |
| - | |
| - | Unicode-dependent applets must call check_unicode_in_env() when they |
| - | begin executing. |
| - | |
| - | Applet code may conditionalize on UNICODE_SUPPORT in order to use |
| - | more efficient code if unicode support is not requested. |
| - | |
| - | Available functions (if you need more, implement them in libbb/unicode.c |
| - | so that they work without LOCALE_SUPPORT too): |
| - | |
| - | int bb_mbstrlen(str) - multibyte-aware strlen |
| - | size_t mbstowcs(wdest, src, n) |
| - | size_t wcstombs(dest, wsrc, n) |
| - | size_t wcrtomb(str, wc, wstate) |
| - | int iswspace(wc) |
| - | int iswalnum(wc) |
| - | int iswpunct(wc) |
| - | |
| - | Applets which only need to align columns on screen correctly: |
| - | |
| - | ls - already done, use source as an example |
| - | df |
| - | dumpleases |
| - | lsmod |
| - | |
| - | Applets which need to account for Unicode chars |
| - | while processing the output: |
| - | |
| - | [un]expand |
| - | fold |
| - | man |
| - | watch |
| - | cut (-b and -c are currently the same, needs fixing) |
| - | |
| - | These applets need to ensure that unicode input |
| - | is handled correctly (say, <unicode><backspace> sequence): |
| - | |
| - | getty, login |
| - | rm -i |
| - | unzip (overwrite prompt) |
| - | |
| - | Viewers/editors are more difficult (many cases to get right). |
| - | libbb/lineedit.c is an example how to do it: |
| - | |
| - | less, most, ed, vi |
| - | awk |
| - | [ef]grep |
| - | sed |
| - | |
| - | Probably needs some specialized work: |
| - | |
| - | loadkeys |