[Aboriginal] Merry christmas, I have found two bugs
rob at landley.net
Wed Dec 26 17:43:08 PST 2012
On 12/26/2012 05:02:53 PM, Bjørn Forsman wrote:
> (gdb) bt
> #0 0xb6edbd34 in raise () from mnt_rootfs/lib/libc.so.0
> #1 0x00028d84 in __div0 () at
> #2 0x000280c8 in __udivsi3 () at
> #3 0x0001a1d0 in next_column (ul=0, dtlen=16, columns=0,
Ah. It's the -C support (which is now the default behavior, new change
last release). Which implies terminal_size() is setting TT.screen_width
to an insane value (either 0 or 1), since columns is capped at
TT.screen_width/2 and then we do a modulus on columns to find our rows
and there's the division by zero error.
Right. And since 0 is filtered out in terminal_size() in lib/lib.c,
this implies that ioctl(TIOCGWINSZ) is setting the screen width to 1.
(Or something is setting COLUMNS=0 which would override the check.)
Not sure that's the proper fix but it'll do for now. (I may need to
tweak the library function to never return insane values, but I need to
add ascii probe logic ot it anyway.)
Thanks. I'm back poking at the other segfault now...
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