[EMAIL PROTECTED] (Ryan M. Golbeck) writes (on debian-hurd):
> [EMAIL PROTECTED] (Ryan M. Golbeck) writes (on debian-hurd):
>
>> I'm trying to get gnumach to start a login shell on the serial port.
>>
>> I have uncommented the line in /etc/ttys that reads:
>> com0 "/libexec/getty 9600" dialup on secure
>>
>> On reboot, runsystem segfaulted with the following error:
>> /libexec/runsystem: line 140: 90 Segmentation fault ${RUNTTYS}
>>
>> I have tried changing dialup to vt100 with the same results. From
>> gnumach's startup messages, it appear as though my serial port at com0
>> is detected fine and the link works fine because grub is properly
>> putting itself onto the serial port during boot up.
>
> I have tried commenting out the console line in /etc/ttys (this idea
> is from a thread from about a year and a half back in this list), and
> it doesn't segfault but neither does it sent anything out onto the
> serial port.
Okay, well that's what I'm trying to do.
If I only have one terminal mentioned in /etc/ttys (no matter which
one) it works, so I can have a login shell on the serial port, or on
the console but not both at once or I will get the segmentation fault.
The backtrace of the segfault:
#0 0x010bc618 in free () from /lib/libc.so.0.2
#1 0x010bc31a in malloc () from /lib/libc.so.0.2
#2 0x010bbb53 in malloc () from /lib/libc.so.0.2
#3 0x010b63c8 in vasprintf () from /lib/libc.so.0.2
#4 0x010ae119 in asprintf () from /lib/libc.so.0.2
#5 0x08048eb6 in setup_terminal (t=0x804af50, tt=0x1190be0)
at ../../../hurd/daemons/runttys.c:101
#6 0x08049013 in add_terminal (tt=0x1190be0)
at ../../../hurd/daemons/runttys.c:129
#7 0x080490b6 in init_ttys () at ../../../hurd/daemons/runttys.c:157
#8 0x0804970a in main () at ../../../hurd/daemons/runttys.c:405
#9 0x0107220b in __libc_start_main () from /lib/libc.so.0.2
This this looked a little weird to me, I played around with it a bit.
The first pass over asprintf never segfaults. The second pass, I
checked that all the arguments passed to it were in order (null
terminated, etc) and everything looked fine but it still segfaulted.
I tried replacing the asprint (line 101 of hurd/daemons/runttys.c) with
the following:
char *line = malloc(100);
sprintf( line, "%s %s", tt->ty_getty, tt->ty_name );
When I did this it segfaults at a different location, the backtrace is:
#0 0x010bc618 in free () from /lib/libc.so.0.2
#1 0x010bc31a in malloc () from /lib/libc.so.0.2
#2 0x010bbb53 in malloc () from /lib/libc.so.0.2
#3 0x08048eab in setup_terminal (t=0x804af50, tt=0x1190be0)
at ../../../hurd/daemons/runttys.c:100
#4 0x0804901b in add_terminal (tt=0x1190be0)
at ../../../hurd/daemons/runttys.c:130
#5 0x080490be in init_ttys () at ../../../hurd/daemons/runttys.c:158
#6 0x0804971a in main () at ../../../hurd/daemons/runttys.c:406
#7 0x0107220b in __libc_start_main () from /lib/libc.so.0.2
I have stepped through the code line by line and follow what it's doing
but I can't figure out what's going wrong up to the point where it starts
calling asprintf() or malloc().
-Ryan
--
Ryan Golbeck <[EMAIL PROTECTED]>
Computer Science
University Of Waterloo
GPG: 1024D/78916B84
1B1B 2A87 3F00 A7FB 40F3 526D 36CF BA44 7891 6B84
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