As you decide.
Debian (working), subshell syscall trace on receiving sigterm:
| $ strace -p 1436
| strace: Process 1436 attached
| wait4(-1, 0x7ffd49d66b90, 0, NULL) = ? ERESTARTSYS (To be restarted if
SA_RESTART is set)
| --- SIGTERM {si_signo=SIGTERM, si_code=SI_USER, si_pid=1461, si_uid=1000} ---
| rt_sigreturn({mask=[CHLD]}) = -1 EINTR (Interrupted system call)
| rt_sigprocmask(SIG_BLOCK, NULL, [CHLD], 8) = 0
| getpid() = 1436
| write(1, "int exit trap in 1436\n", 22) = 22
| rt_sigaction(SIGTERM, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER,
sa_restorer=0x7f3bbdc8b940}, {sa_handler=0x5644f7bf6f40, sa_mask=[HUP INT ILL
TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS],
sa_flags=SA_RESTORER, sa_restorer=0x7f3bbdc8b940}, 8) = 0
| getpid() = 1436
| kill(1436, SIGTERM) = 0
| --- SIGTERM {si_signo=SIGTERM, si_code=SI_USER, si_pid=1436, si_uid=1000} ---
| +++ killed by SIGTERM +++
Centos (not working):
| $ strace -p 90700
| Process 90700 attached
| wait4(-1, 0x7ffd77995430, 0, NULL) = ? ERESTARTSYS (To be restarted if
SA_RESTART is set)
| --- SIGTERM {si_signo=SIGTERM, si_code=SI_USER, si_pid=90617, si_uid=1000} ---
| +++ killed by SIGTERM +++
Regards, Konstantin.
Chet Ramey, 26 Mar 2019 21:16 MSK:
Run a system call tracer, I suppose. That will tell you the order in which
things happen when the processes are traced, at least.
Chet
Konstantin Andreev, 26 Mar 2019 19:44 MSK:
bash-5.0.3,
Just built and tested it. The systems are x86-64.
+ Debian GNU/Linux buster/sid (pre-10): works (both exit traps are invoked)
- CentOS Linux 7.2.1511: NOT work (subshell exit trap is NOT invoked)
- Oracle Solaris 11.3: NOT work (subshell exit trap is NOT invoked)
What can I do to help you isolate this issue?
