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The sprintf() call, while technically valid (17 bytes fits in an 18
byte allocation) trips Alpine fortify-headers due to checking for
allocations that could potentially overrun.
The call is pointless anyway -- as we are appending a constant to
another constant, it is better to just let the compiler do so and
calculate the size. This is supported by ISO C89 and later, and
thus any compiler that would be used to compile toybox.
Signed-off-by: Ariadne Conill <ariadne@dereferenced.org>
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The glibc headers also provide that member, but s6_addr is the portable way.
This fixes compilation on musl libc.
Signed-off-by: Ariadne Conill <ariadne@dereferenced.org>
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(Also fix -v output going to stderr when it shouldn't.)
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This let me compare against the host for #225.
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(Apologies for the length of this commit message, but it's not entirely
clear how we arrived at our present state, and right now all three of
toybox, busybox, and util-linux differ from each other. And it took a
week of arguments behind the scenes to agree on what we thought was the
right behavior, which seemed worth capturing for posterity.)
This reverts my change ef0546d4f536f42a57af4c32bd37f7fd752d10c2 from
2015. The commit message back then claimed:
For systems using /dev/rtcN, /dev/rtc0 isn't necessarily the RTC
that's used to provide the system time at boot time. We need to
search for the RTC whose /sys/class/rtc/rtcN/hctosys contains "1".
A few things to note here:
1. I can't find any historical motivation for this change. There's no
bug, there's no internal email thread, and I can't even find anything
referring to devices using anything other than /dev/rtc0.
2. It turns out (though this wasn't true at the time) that the kernel
since 4.19 interprets hctosys as the RTC that *did* set the clock,
not the RTC that *should* set the clock.
3. That's not an academic difference. If you have a cheap RTC that isn't
battery-backed, or you have an RTC whose battery died, and you're
using Linux 4.19 or later, you will boot with no RTC having hctosys=1.
4. An actual SoC vendor has hit this in practice.
My original toybox patch appears to be equivalent to code in the Android
frameworks, which -- under the auspices of the SoC vendor's bug --
I'm about to replace with code that checks "/dev/rtc" first, then
"/dev/rtc0", then fails hard. (Strictly, it's this copy of the search
that's causing the SoC vendor issues. AFAIK no-one's using
hwclock/rtcwake except interactively. And even if they are, Android
devices ship with [at least] two copies of toybox, so code/scripts on
the vendor partition will continue to run the vendor copy of toybox they
were developed against, and a newer toybox elsewhere on the system won't
affect them.)
All Android devices (and emulators) available to me at the moment use
/dev/rtc0, but supporting /dev/rtc gives a workaround for anyone who
really insists on using an RTC other than /dev/rtc0. That said, the
Generic Kernel Image (GKI) always assumes /dev/rtc0, so going forward
/dev/rtc0 is always the right choice.
I did consider making toybox hwclock try /dev/rtc, /dev/rtc0, and
/dev/misc/rtc -- and even wrote the code for that first -- but strace
shows that busybox and util-linux's hwclock implementations differ in
the order in which they try these (busybox tries /dev/rtc first,
util-linux tries /dev/rtc0 first). Given that util-linux seems like the
more canonical precedent, trying /dev/rtc0 and then falling back to
/dev/rtc would offer no advantage to Android users (and would seem to be
just another stumbling block in getting everyone to a world where
/dev/rtc0 is "the" system RTC).
Note that rtcwake is unaffected by all this, because the toybox and
util-linux implementations both default to only trying /dev/rtc0 already.
Bug: https://issuetracker.google.com/158051176
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Found trying to run the libc++ tests.
For coreutils, `info chmod` says:
'chmod' ignores symbolic links encountered during recursive directory
traversals.
Bug: http://b/155809792
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pointing to end of current block so we don't have to search for it later.
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Add presumably intended conversion specifier for gconfig.valid_lifetime
as it is an argument to error_msg despite the format string having no
conversion specifiers.
Remove always true false inverse check for address of array
gstate.rcvd.rcvd_pkt6.transaction_id.
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slightly more elaborate debug output.
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Yeah, this limits 32 bit support, but that's a "fix it properly in lib/args.c
or don't care" issue. Why work around it here when truncate -s doesn't?
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Increase memory:swpd,free,cache to 7 characters
Increase swap:si,so to 5 characters
Increase system:in,cs to 5 characters
Sample output from Pixel 4 phone:
procs ------------memory------------ ----swap--- -----io---- ---system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
4 0 1111676 87896 6328 2268596 8152 11896 10712 14280 0 25712 31 21 46 3
17 0 1082788 224292 5972 2213996 73220 68908 2432 3948 1 26611 41 38 22 0
6 0 1127316 203196 5972 2225164 8980 53996 11796 788 0 25200 33 22 45 1
0 0 1133072 200984 5972 2225280 416 6260 52 88 0 8543 10 6 84 0
2 0 1128976 196976 5972 2225692 3588 0 340 800 0 5243 5 4 91 0
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