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This makes it possible to use samba_runcmd_send() in processes like smbd
that install a SIGCHLD handler that reaps all terminated children.
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
This reverts commit 292e46ab12d8ec172c9d3b26330d8d6028a1d5a5.
Processes run by tfork will have a parent pid of 1, they won't be childs
of the caller anymore.
When the source4 samba process uses samba_runcmd_send() to launch smbd
and winbindd the resulting process hierarchy becomes:
PPID PID PGID SID TTY TPGID STAT UID TIME COMMAND
1 516 510 510 ? -1 S 111 0:02 avahi-daemon: running [samba-ad.local]
1 29209 29209 29209 ? -1 Ss 0 0:00 ./bin/samba
29209 29210 29209 29209 ? -1 S 0 0:00 \_ ./bin/samba
29209 29211 29209 29209 ? -1 S 0 0:00 \_ ./bin/samba
29209 29213 29209 29209 ? -1 S 0 0:00 \_ ./bin/samba
29209 29215 29209 29209 ? -1 S 0 0:00 \_ ./bin/samba
29209 29216 29209 29209 ? -1 R 0 0:00 \_ ./bin/samba
29209 29217 29209 29209 ? -1 S 0 0:00 \_ ./bin/samba
29209 29218 29209 29209 ? -1 S 0 0:00 \_ ./bin/samba
29209 29220 29209 29209 ? -1 S 0 0:00 \_ ./bin/samba
29209 29221 29209 29209 ? -1 S 0 0:00 \_ ./bin/samba
29209 29222 29209 29209 ? -1 S 0 0:00 \_ ./bin/samba
29209 29223 29209 29209 ? -1 S 0 0:00 \_ ./bin/samba
29209 29224 29209 29209 ? -1 S 0 0:00 \_ ./bin/samba
29209 29225 29209 29209 ? -1 S 0 0:00 \_ ./bin/samba
1 29214 29209 29209 ? -1 S 0 0:00 ./bin/samba
29214 29219 29219 29219 ? -1 Ss 0 0:00 \_ /home/slow/git/samba/scratch/bin/smbd -D --option=server role check:inhibit=yes --foreground
29219 29236 29219 29219 ? -1 S 0 0:00 \_ /home/slow/git/samba/scratch/bin/smbd -D --option=server role check:inhibit=yes --foreground
29219 29237 29219 29219 ? -1 S 0 0:00 \_ /home/slow/git/samba/scratch/bin/smbd -D --option=server role check:inhibit=yes --foreground
29219 29238 29219 29219 ? -1 S 0 0:00 \_ /home/slow/git/samba/scratch/bin/smbd -D --option=server role check:inhibit=yes --foreground
1 29228 29209 29209 ? -1 S 0 0:00 ./bin/samba
29228 29230 29230 29230 ? -1 Ss 0 0:00 \_ /home/slow/git/samba/scratch/bin/winbindd -D --option=server role check:inhibit=yes --foreground
29230 29239 29230 29230 ? -1 S 0 0:00 \_ /home/slow/git/samba/scratch/bin/winbindd -D --option=server role check:inhibit=yes --foreground
They will still be in the same process group and session, but just not
be a child or subchild. For childs of the source4 samba process this
might be non desirable.
killing all processes by sending a signal to the main samba process
still works, because a pipe is used between the samba process and the
smbd and winbindd childs. Both watch for EOF on the pipe.
In the output above smbd and winbindd are in their own process group ans
session because they call become_daemon().
See also the discussion in this mailthread:
<https://lists.samba.org/archive/samba-technical/2017-April/120257.html>
Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Sun Apr 30 17:21:05 CEST 2017 on sn-devel-144
In contrast to source3, this is run as root and without substitution.
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
