psig for Linux

[Eugene Teo <eugeneteo at kernel dot sg>]

Hi,

psig is a Solaris proc utility for listing the signal actions and
handlers of a process. Anyone who uses Linux would know that there is no
equivalent tool in Linux, and getting information related to the process
signals' disposition is not trivial, so I decided to write one using
SystemTap.

The version of psig I wrote looks very much like the Solarisâ psig tool
but it is not a port. It was written based on the example output of
http://developers.sun.com/solaris/articles/solaris_linux_app.html,
and it is licensed GPL.

Here is how it looks like when I run the script:

$ psig $$ | egrep ":|^HUP|^SEGV|^BUS"
5981:    bash
HUP      caught   0x0808d040  0  HUP,INT,ILL,TRAP,ABRT,BUS,FPE,USR1,SEGV,
  USR2,PIPE,ALRM,TERM,XCPU,XFSZ,VTALRM,SYS
BUS      caught   0x0808d040  0  HUP,INT,ILL,TRAP,ABRT,BUS,FPE,USR1,SEGV,
  USR2,PIPE,ALRM,TERM,XCPU,XFSZ,VTALRM,SYS
SEGV     caught   0x0808d040  0  HUP,INT,ILL,TRAP,ABRT,BUS,FPE,USR1,SEGV,
  USR2,PIPE,ALRM,TERM,XCPU,XFSZ,VTALRM,SYS

For more information, take a look at:
http://sources.redhat.com/systemtap/wiki/WSPsig

It requires a patch to tapset/signal.stp. You can refer to my email I
sent just now: [PATCH] Added new functions in tapset/signal.stp or
download it here: http://www.kernel.sg/scripts/psig/.

Enjoy!

Thanks,
Eugene