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Ok, it was some time ago, but I do not think that the $SHELL variable is reliable. look at my

$ /bin/sh -c 'echo $SHELL' /bin/bash
$ file /bin/sh /bin/sh: symbolic link to `dash'
$ file /bin/dash /bin/dash: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), d +ynamically linked (uses shared libs), for GNU/Linux 2.6.26, BuildID[s +ha1]=0x890a514bd261794a6d39da58ea2372fdf48e98d6, stripped
I don't really know why. Maybe DASH keeps the environment of the calling shell, but I do not trust $SHELL.

In reply to Re^2: how does qx select a "/bin/sh equivalent"? by gnujsa
in thread how does qx select a "/bin/sh equivalent"? by bronto

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