[ILUG] ksh: What signal did trap trap?

[Brian Foster]

  | Date: Thu, 31 Mar 2005 12:26:34 +0100 (IST)
  | From: Éibhear Ó hAnluain <eibhear.geo at yahoo.com>
  | 
  | I am looking at a ksh script which has the following command:
  | 
  | trap "clean_up; report_error $ERR_CLOSE_DOWN; exit" 1 2 3 4 5 6 7 8 9 10 \
  |     11 12 13 14 15
  | 
  | where clean_up() and report_error() are ksh functions also defined in the
  | script.
  | 
  | Is there a way (e.g. an environment variable?) for me to determine what
  | signal was trapped so that I can report it in report_error()?

 as far as I can recall, No.
 so do something like (there are many variations on this theme):

   trap "clean_up; report_error $ERR_CLOSE_DOWN  1; exit"  1
   trap "clean_up; report_error $ERR_CLOSE_DOWN  2; exit"  2
    ...
   trap "clean_up; report_error $ERR_CLOSE_DOWN 15; exit" 15

 b.t.w., signal 9 is nominally SIGKILL, which cannot be caught,
 so `trap'ping it is pointless.   also, note that the exit(2)
 status will be the return value of `report_error', which may
 not be what you intend?

cheers!
	-blf-
-- 
Experienced (20+ yrs) kernel/software Eng: | Brian Foster   Montpellier,
 • Unix, embedded, &tc;  • Linux;  • doc;  | blf at utvinternet.ie   FRANCE
 • IDL, automated testing, process, &tc.   |  Stop E$$o (ExxonMobile)!
Résumé (CV) http://www.blf.utvinternet.ie  |     http://www.stopesso.com