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propagating environment variable via internal command

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  propagating environment variable via internal command Tomáš Čech <sleep_walker@gnu.org> - 2018-06-20 15:25 +0200

#14252 — propagating environment variable via internal command

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Hi,


when comparing strange behaviors of different shell implementations Tomas Janousek found this bug

When using BASH as sh shell...

  $ ls -l /bin/sh
  lrwxrwxrwx 1 root root 4 Jun 13 16:25 /bin/sh -> bash

...internal shell command `set' propagates environment variable to the process its running:

  $ /bin/sh
  sh-4.4$ VARIABLE=value set -o noglob
  sh-4.4$ env | grep VARIABLE
  VARIABLE=value
  sh-4.4$

The problem doesn't occur if BASH is not running in POSIX mode

  $ /bin/bash
  bash-4.4$ VARIABLE=value set -o noglob
  bash-4.4$ env | grep VARIABLE
  bash-4.4$


This seems to be inconsistent with other shells but mainly it looks wrong.

Best regards,

S_W

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