Re: dash 0.5.11.2, busybox sh 1.32.0, FreeBSD 12.2 sh: spring TTOU but should not i think

[Steffen Nurpmeso <steffen@xxxxxxxxxx>]

Jilles Tjoelker wrote in
 <20201221162442.GA26001@xxxxxxxx>:
 |On Sat, Dec 19, 2020 at 11:52:31PM +0000, Harald van Dijk wrote:
 |> On 19/12/2020 22:21, Steffen Nurpmeso wrote:
 |>> Steffen Nurpmeso wrote in
 |>>   <20201219172838.1B-WB%steffen@xxxxxxxxxx>:
 |>>|Long story short, after falsely accusing BSD make of not working
 |
 |>> After dinner i shortened it a bit more, and attach it again, ok?
 |>> It is terrible, but now less redundant than before.
 |>> Sorry for being so terse, that problem crosses my head for about
 |>> a week, and i was totally mislead and if you bang your head
 |>> against the wall so many hours bugs or misbehaviours in a handful
 |>> of other programs is not the expected outcome.
 |
 |> I think a minimal test case is simply
 |
 |> all:
 |>         $(SHELL) -c 'trap "echo TTOU" TTOU; set -m; echo all good'
 |
 |> unless I accidentally oversimplified.
 |
 |Yes, and it can be simplified a bit more to remove make from the
 |picture:
 |    (SHELL -c 'trap "echo TTOU" TTOU; set -m; echo all good'; :)

Cool, .. but it all seems to depend on the outer shell

  #$ bash -c  "( /bin/dash -c 'trap echo\ TTOU TTOU; set -m; echo all good' )"
  /bin/dash: 1: set: Cannot set tty process group (Interrupted system call)
  #$ mksh -c  "( /bin/dash -c 'trap echo\ TTOU TTOU; set -m; echo all good' )"
  /bin/dash: 1: set: Cannot set tty process group (Interrupted system call)
  #$ dash -c  "( /bin/dash -c 'trap echo\ TTOU TTOU; set -m; echo all good' )"
  all good

which results in the funny experience

  #?0|kent:tmp$ smake -f t.mk SHELL=/bin/bash
  .../bin/bash -c 'trap "echo TTOU" TTOU; set -m; echo all good'
  all good
  #?0|kent:tmp$ smake -f t.mk SHELL=/bin/mksh
  .../bin/mksh -c 'trap "echo TTOU" TTOU; set -m; echo all good'
  all good
  #?0|kent:tmp$ smake -f t.mk SHELL=/bin/dash
  .../bin/dash -c 'trap "echo TTOU" TTOU; set -m; echo all good'
  /bin/dash: 1: set: Cannot set tty process group (Interrupted system call)
  smake: *** Code 2 (No such file or directory) from command line for target 'all'.
  smake: Couldn't make 'all'.

Ah, it is a Monday ..

--steffen
|
|Der Kragenbaer,                The moon bear,
|der holt sich munter           he cheerfully and one by one
|einen nach dem anderen runter  wa.ks himself off
|(By Robert Gernhardt)