Yes, using RTMIN and RTMIN+1, rather than USR1/2 seems to work with that version as well as Version JMP 93t+ 2009-05-01. So it seems that the regression may be related to only a few signals - not as horrible as it initially seemed.
Thanks for the perspective. GM ----- Original Message ----- From: [email protected] To: GORDON MARLER (BLOOMBERG/ 731 LEXIN) Cc: [email protected] At: 10/23 6:32:29 Version JMP 93t+ 2009-10-12 on Solaris 11 I get: 1. ksh93 -c 'trap "print SCHILD" CHLD ; trap "print USR1" USR1 ; sleep 0.1 ; kill -USR1 $$ ; sleep 1' result: no output 2. ksh93 -c 'trap "print USR1" USR1 ; sleep 0.1 ; kill -USR1 $$ ; sleep 1' result: USR1 3. ksh93 -c 'trap "print SCHILD" CHLD ; trap "print SRT" RTMIN ; sleep 0.1 ; kill -RTMIN $$ ; sleep 1' result: SRT IMO the real time signals (RTMIN...RTMAX) can be used as workaround. On 10/20/09, GORDON MARLER, BLOOMBERG/ 731 LEXIN <[email protected]> wrote: > This appears to have been introduced after 2008-11-04. > > If you set a trap on SIGCHLD, all other previously set traps are ignored > from ksh 2009-05-05 up through ksh 2009-10-14. > > Setting traps on SIGUSR1 and SIGUSR2 works as expected: > ksh93 -c 'trap "print got_USR1" SIGUSR1 ; trap "print got_USR2" SIGUSR2 ; > sleep 2 & for (( i = 0; i < 5; i++ )) ; do print $i ; sleep 1 ; kill -USR1 $$ > ; kill -USR2 $$ ; done ; wait ; print " done"' > > Output follows: > 0 > got_USR1 > got_USR2 > 1 > got_USR1 > got_USR2 > 2 > got_USR1 > got_USR2 > 3 > got_USR1 > got_USR2 > 4 > got_USR1 > got_USR2 > done > > Adding a trap on SIGCHLD to the mix gives this unexpected output: > ksh93 -c 'trap "print got_CHLD" SIGCHLD ; trap "print got_USR1" SIGUSR1 ; > trap "print got_USR2" SIGUSR2 ; sleep 2 & for (( i = 0; i < 5; i++ )) ; do > print $i ; sleep 1 ; kill -USR1 $$ ; kill -USR2 $$ ; done ; wait ; print " > done"' > > Output follows: > 0 > 1 > got_CHLD > 2 > 3 > 4 > done > > Running the same script above under ksh93 2008-11-04 gives the expected > output: > 0 > got_USR1 > got_USR2 > 1 > got_CHLD > got_USR1 > got_USR2 > 2 > got_USR1 > got_USR2 > 3 > got_USR1 > got_USR2 > 4 > got_USR1 > got_USR2 > done > > Gordon > > _______________________________________________ > ast-users mailing list > [email protected] > https://mailman.research.att.com/mailman/listinfo/ast-users > -- , _ _ , { \/`o;====- Olga Kryzhanovska -====;o`\/ } .----'-/`-/ [email protected] \-`\-'----. `'-..-| / Solaris/BSD//C/C++ programmer \ |-..-'` /\/\ /\/\ `--` `--` _______________________________________________ ast-users mailing list [email protected] https://mailman.research.att.com/mailman/listinfo/ast-users
