From: Nick Bowler <nbowler@draconx.ca>
Date: Tue, 9 Mar 2021 03:36:50 +0000 (-0500)
Subject: Fix DX_COMMAND_OUTPUT backslash-newline on heirloom-sh.
X-Git-Url: https://git.draconx.ca/gitweb/dxcommon.git/commitdiff_plain/c01bc8e8ea99252f4249434e432896c8f2ae1199?hp=c01bc8e8ea99252f4249434e432896c8f2ae1199

Fix DX_COMMAND_OUTPUT backslash-newline on heirloom-sh.

It seems that heirloom-sh (and presumably Solaris /bin/sh) read just
silently eats backslash-newlines, and escaping the backslash does
nothing useful, the shell just eats both backslashes and the newline.

Attempt to avoid this problem by appending a magic string to
troublesome lines, and stripping it after reading.  This will
obviously fail if the input _actually_ has this sequence but
hopefully that will not be an issue in practice.
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