On Sun, Aug 15 2021, Claus Assmann <ca+openbsd_m...@esmtp.org> wrote: > I must misunderstand something about wait (sh command), but I'm not > sure what: why does wait return 127 for an existing process? > > $ PM=31309;kill -HUP $PM; echo $?; ps -p $PM; wait $PM; echo $?; ps -p $PM > 0 > PID TT STAT TIME COMMAND > 31309 p0 S 0:00.03 ../libpmilter/t-pmilter-1 -r m=550 > 127 > PID TT STAT TIME COMMAND > 31309 p0 S 0:00.03 ../libpmilter/t-pmilter-1 -r m=550 > $ wait $PM; echo $? > 127 > $ kill -0 $PM;echo $? > 0 > > (OpenBSD 6.8) > > I guess the (multi-threaded) process is in some "weird" state?
I think Andreas provided a good answer already, > PS: it seems I can't attach a debugger either: > $ egdb -p $PM ../libpmilter/t-pmilter-0 > GNU gdb (GDB) 7.12.1 > ... > Reading symbols from ../libpmilter/t-pmilter-0...done. > Attaching to program: /home/ca/sm-9/openbsd-111/libpmilter/t-pmilter-0, > process 31309 > ptrace: Operation not permitted. About this one: revision 1.66 date: 2014/12/12 07:45:46; author: tedu; state: Exp; lines: +9 -1; commitid: tOiu53jgNjU0V5Os; sysctl kern.global_ptrace. controls whether you can ptrace any process with appropriate privileges or only one own's children. ok deraadt -- jca | PGP : 0x1524E7EE / 5135 92C1 AD36 5293 2BDF DDCC 0DFA 74AE 1524 E7EE
