annoying simple Guile question

[Derek Atkins]

Neil Williams <linux at codehelp.co.uk> writes:

> When running a console application that uses guile via gnucash-env, how do I 
> abort?

You mean how do you get the program to exit?  You call exit();
in your C, or (exit) from guile.

> I free the memory I used, I call gnc_engine_shutdown() but the program hangs, 
> waiting for a Ctrl-C. I've checked and all the usual tidying up functions are 
> called without errors - it exits normally when allowed to complete the 
> program, but if there's an error or if the user simply wants to abort, I 
> can't get it to exit.
>
> exit(1); is no help.

Uh, this is how you exit from ANY C program...

> I have put error handlers at the start of every function that would be called 
> after the abort to cause the function to return if abort is set, no odds.
>
> The code itself has changed many times but this problem has remained since I 
> started using it via guile to get access to the file backend to read the 
> QofBook data from external files. It's the example code here:
> http://code.neil.williamsleesmill.me.uk/example-gncBookMerge.c
> (the new home for my code - codehelp doesn't have the space)
>
> (gdb) continue
> Continuing.
>
> Program received signal SIGINT, Interrupt.
> [Switching to Thread 16384 (LWP 30982)]
> 0x402b94fd in mallopt () from /lib/libc.so.6
> #0  0x402b94fd in mallopt () from /lib/libc.so.6
> #1  0x402b8d08 in mallopt () from /lib/libc.so.6
> #2  0x402b7ef3 in malloc () from /lib/libc.so.6
> #3  0x414ac2ee in operator new () from /usr/lib/libstdc++.so.5
> #4  0x414ac41f in operator new[] () from /usr/lib/libstdc++.so.5
> #5  0x415cd142 in OpenSP::String<char>::resize () from /usr/lib/libosp.so.4
> #6  0x415ccf8c in OpenSP::FileOutputByteStream::flush () 
>>From /usr/lib/libosp.so.4
> #7  0x415ccf09 in OpenSP::FileOutputByteStream::close () 
>>From /usr/lib/libosp.so.4
> #8  0x415ccd40 in OpenSP::FileOutputByteStream::~FileOutputByteStream () 
>>From /usr/lib/libosp.so.4
> #9  0x41583c42 in OpenSP::CmdLineApp::closeFileErrorMessage () 
>>From /usr/lib/libosp.so.4
> #10 0x40272ae2 in exit () from /lib/libc.so.6
> #11 0x4010451d in scm_init_guile () from /usr/lib/libguile.so.12
> #12 0x4010420b in scm_boot_guile () from /usr/lib/libguile.so.12
> #13 0x0804a2da in main_helper (closure=0x1, argc=1077375036, argv=0x4037703c) 
> at example-gncBookMerge.c:282
> #14 0x4025cdc6 in __libc_start_main () from /lib/libc.so.6
> #15 0x08049891 in ?? ()

Uh, how/why are you using OpenSP?  It looks like OpenSP has an exit
handler (via atexit()) which seems to be trying to flush a stream
and hanging during a malloc call.

Very odd -- you must be doing something different than GnuCash.
Strangely, none of the other test programs have this problem, so I'd
start looking at how you're being different than those.  I'd start
with the tests in the file backend.

I'll also note that you might have a dependency issue if you're trying
to "load files" from src/engine/test.

-derek
-- 
       Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
       Member, MIT Student Information Processing Board  (SIPB)
       URL: http://web.mit.edu/warlord/    PP-ASEL-IA     N1NWH
       warlord at MIT.EDU                        PGP key available