Usage of ptrace

[Badri Lokanathan]

I want to write some code that prints out the call stack on demand (eg
during a segmentation fault.) The goal is to achieve something similar
to the "trace" command on a sun (which is limited to system calls only,)
except that I require user-defined functions as well.
Is it possible to use ptrace to do this? Could someone mail me a
snippet of code to show me how?

Thanks.
-- 
,------------------------.    "O! the beautiful bombs falling!
| Badri Lokanathan       |     Children leap as deer to catch them.
| sdl!badri at uunet.uu.net |     Mothers burst open like flowers.
`------------------------'     Fathers spin away into orange air."  -Dick Bakken