Messages in this thread | | | From | David Laight <> | Subject | RE: [PATCH v2] selftests/lkdtm: Use /bin/sh not $SHELL | Date | Thu, 24 Jun 2021 07:21:15 +0000 |
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From: Kees Cook > Sent: 23 June 2021 23:47 > > On Wed, Jun 23, 2021 at 04:27:47PM +0000, David Laight wrote: ... > > You can probably even do: > > > > echo "$test" | /bin/sh -c cat >$TRIGGER || true > > > > (moving the redirect to the outer shell). > > Actually, it looks like the "write" is already happening in the exec'd > process, so this can just be: > > echo "$test" | cat >$TRIGGER || true > > But it still can't be: > > echo "$test" >$TRIGGER > > which is what I had over-engineered a solution to. :)
That one fails because echo is the shell builtin. But: /bin/echo "$test" >$TRIGGER should be fine.
Quite where the original came from I not sure I want to find out.
David
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