[Toybox] macOS sitrep

[enh]

(they asked for the loaner mac back on monday, so i did a quick test that
bwk's one-true-awk builds out of the box and then returned it. i'll come
back to the mac when linux is all squared away.)

On Sat, Dec 8, 2018 at 5:18 PM enh <enh at google.com> wrote:

>
>
> On Fri, Dec 7, 2018, 19:36 Rob Landley <rob at landley.net wrote:
>
>>
>>
>> On 12/7/18 8:28 PM, enh wrote:
>> > On Tue, Dec 4, 2018 at 8:05 PM Rob Landley <rob at landley.net> wrote:
>> >>
>> >> On 12/4/18 7:06 PM, enh wrote:
>> >>> okay, so now toybox builds out of the box (with a custom .config) i
>> >>> added a bunch more stuff to my .config. the following were all
>> >>> painless:
>> >>>
>> >>> ascii base64 basename cal cat catv chgrp chmod chown cksum clear cmp
>> >>> comm count cpio crc32 cut dirname dos2unix du echo egrep env expand
>> >>> factor false fgrep file flock fmt ftpget ftpput grep groups head help
>> >>> hexedit hostname iconv id kill killall5 link ln logname md5sum
>> microcom
>> >>> mkdir mkfifo mktemp nc netcat nice nl nohup od paste patch printenv
>> >>> printf pwd pwdx readlink realpath renice rev rm rmdir sed seq setsid
>> >>> sha1sum sha224sum sha256sum sha384sum sha512sum sleep sort split
>> strings
>> >>> tac tee timeout true truncate tty uname uniq unix2dos unlink usleep
>> >>> uudecode uuencode uuidgen w watch wc which who whoami xargs xxd yes
>> >>
>> >> Could you send me your .config? I can check in a "make
>> macos_defconfig".
>> >
>> > with the two extra patches i just sent to the list, you can build a
>> > whole bunch of stuff:
>>
>> Applied.
>>
>> > ascii base64 basename cal cat catv chgrp chmod chown cksum clear cmp
>> > comm count cpio crc32 cut date dirname dos2unix du echo egrep env
>> > expand factor false fgrep file find flock fmt ftpget ftpput getconf
>> > grep groups head help hexedit hostname iconv id kill killall5 link
>> > ln logger logname ls md5sum microcom mkdir mkfifo nc netcat nice nl
>> > nohup od paste patch printenv printf pwd pwdx readlink realpath renice
>> > rev rm rmdir sed seq setsid sha1sum sha224sum sha256sum sha384sum
>> > sha512sum sleep sort split strings tac tee time timeout touch tr true
>> > truncate tty uname uniq unix2dos unlink usleep uudecode uuencode uuidgen
>> > w watch wc which who whoami xargs xxd yes
>>
>> Which means it's _not_ building.... (rummage rummage)
>>
>> acpi blkid blockdev bunzip2 bzcat chattr chroot chrt chvt cp df dmesg
>> eject
>> fallocate free freeramdisk fsfreeze fstype fsync halt hwclock i2cdetect
>> i2cdump
>> i2cget i2cset ifconfig inotifyd insmod install ionice iorenice iotop
>> killall
>> login losetup lsattr lsmod lspci lsusb makedevs mix mknod mkpasswd mkswap
>> mktemp
>> modinfo mount mountpoint mv nbd-client netstat nproc oneit partprobe
>> passwd
>> pgrep pidof ping ping6 pivot_root pkill pmap poweroff prlimit ps readahead
>> reboot reset rfkill rmmod setfattr shred stat su swapoff swapon
>> switch_root sync
>> sysctl tail taskset test top tunctl ulimit umount uptime vconfig vmstat
>>
>>
>> Hmmm... bunzip2 and bzcat are easy, reset, sync, mktemp, and test might
>> already
>>
>
> mktemp was disabled here only because ToT was broken. iirc I've built it
> before.
>
> work, shred is trivial but silly on journaled filesystems (it was a
>> request),
>> dunno how much work stat is, tail has two codepaths and one's probably
>> easy...
>>
>> The cp/install/mktemp/mv cluser... dunno what's missing? IN theory the
>> openat()
>> stuff is posix-2008?
>>
>
> I explained in my mail *and* had a TODO comment in .config explaining it
> :-P
>
> Basically, BSD has a different API for xattrs.
>
> ps/top/iotop/pkill/pgrep are probably a nightmare because of the /proc
>> stuff and
>> I have no idea what a macos equivalent would look like.
>>
>
> Yeah, one of the build guys tells me he's actually looked at this recently
> and found that there doesn't seem to be an official API. Meh... We can
> worry about these if we ever have real macOS users.
>
> Most of the rest probably doesn't apply conceptually. (I mean... maaaaaybe
>> blkid? Dunno what macos does for mount...)
>>
>> > i've basically ignored pending for now, because i was only originally
>> > hoping to answer the question "is this feasible?" and i think we have
>> > a pretty strong "yes" that includes most of the things we'd need for a
>> > mac AOSP build already.
>>
>> Cool.
>>
>
> (You'll see I did build tr, even though it's in pending. That was because
> the build guy specifically asked. But I don't plan on using anything in
> pending in the build. I'm concerned enough about stability as it is,
> without relying on things that are going to get major rewrites.)
>
> > i might try to get the xattr portability wrapper done before i have to
>> > give the mac back, but otherwise i'm hanging the "mission
>> > accomplished" banner for now and will worry about actually, you know,
>> > _using_ this stuff some other day. probably after i've finished
>> > getting linux AOSP builds switched over, which is much more
>> > interesting to me anyway (and especially in the short term).
>>
>> I wonder how horrible building this subset under https://midipix.org
>> and/or the
>> Windows linux binary running thingy interface is?
>>
>> > i've attached my config. note that i've included TODOs explaining why
>> > a few of the main failures don't build. tail's inotify is
>> > interesting/annoying.
>>
>> It's all for FLAG_f. I could add a compile-time probe with a config
>> symbol and a
>> portability.h stub? (Or move the sys/inotify.h #include into
>> portability.h so
>> #ifdef APPLE could #else it...)
>>
>
> Yeah, that works for tail. I suggested the ON_BSD/ON_LINUX for general use
> because it seemed like that would be a better way to have the config stuff
> work. I was thinking more of things like insmod. But maybe there aren't
> actually many cases where the whole command is meaningless (as opposed to
> just some specific option).
>
> Like I say, I'll try to have a look at the last few POSIX toys before I
> return the loaner Mac. (And I'll borrow another when I've finished
> switching AOSP over for Linux and I'm ready to think seriously about macOS.)
>
> >>> (i haven't even bothered trying anything from pending.)
>> >>
>> >> If you get the urge for specific commands out of there, lemme know. I
>> just
>> >> finished redoing test.c and I'm squinting at tftpd.c now (using a
>> dhcp/bootp
>> >> thing at $DAYJOB)...
>> >
>> > of the stuff in pending, AOSP builds would use dd, diff, egrep, grep,
>> > tar, and tr.
>>
>> grep isn't in pending, but I need to add --color support.
>>
>
> Yes, to me that's conceptually still in pending because I think it's going
> to be a pretty big rewrite 😀
>
> > all of which were on your "non-trivial" list. (we're
>> > _building_ toybox's grep family, but we're still using the BSD ones.
>> > Q/master is currently using toybox dd [P had BSD dd].)
>>
>> Lemme see what I can get done on grep --color this weekend...
>>
>
> If you're quick I might even risk switching Android over for Q... December
> is when I stop making drastic changes. My notes only really mention --color:
>
> grep --- missing --color. compare performance with BSD grep before
> switching; BSD grep has workarounds for performance in the BSD regex
> implementation (if we find anything we should see if we can fix bionic
> instead).
>
> The macos regex() implementation is still a bit different from any of the
>> linuxes, might still cause a problem there...
>>
>
> But probably similar to bionic, I'd imagine...
>
> Rob
>>
>
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