[issue1821] DFBSD v2.7.3.835.g6abace - tcsh hangs on exit under tmux

[Antonio Huete Jimenez (via DragonFly issue tracker)]

Antonio Huete Jimenez <tuxillo at quantumachine.net> added the comment:

Just some more discoverings. When you login via ssh, and you issue:

[vmware] ~> ps axl | grep tcsh
 1000   959   958   8 152   0  3688 1720 ppwait DLs    0    0:00.04 -tcsh (tcsh)
 1000   965   959   8 157   0  3688 1720 -      RVL    0    0:00.00 -tcsh (tcsh)

See that tcsh in ppwait wchan is child of sshd:

 1000   958   956   0 152   0  7904 2452 kqread SL    ??    0:00.02 sshd:
antonioh at pts/0 (sshd)

And the tcsh process in RVL state is child of the other tcsh. If you issue
several ps command again and again, you'll see that tcsh process PID changes.

[vmware] ~> ps axl | grep tcsh
 1000   959   958   8 152   0  3688 1720 ppwait DLs    0    0:00.06 -tcsh (tcsh)
 1000   974   959   8 157   0  3688 1720 -      RVL    0    0:00.00 -tcsh (tcsh)
[vmware] ~> ps axl | grep tcsh
 1000   959   958   9 152   0  3688 1720 ppwait DLs    0    0:00.06 -tcsh (tcsh)
 1000   976   959   9 157   0  3688 1720 -      RVL    0    0:00.00 -tcsh (tcsh)
[vmware] ~> ps axl | grep tcsh
 1000   959   958   9 152   0  3688 1720 ppwait DLs    0    0:00.06 -tcsh (tcsh)
 1000   978   959   9 157   0  3688 1720 -      RVL    0    0:00.00 -tcsh (tcsh)
[vmware] ~> ps axl | grep tcsh
 1000   959   958  10 153   0  3688 1720 ppwait DLs    0    0:00.06 -tcsh (tcsh)
 1000   980   959  10 158   0  3688 1720 -      RVL    0    0:00.00 -tcsh (tcsh)

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status: unread -> chatting

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