[Bug 224270] Get exit status of process that's piped to another: set -o pipefail is missing for /bin/sh

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=224270

Wolfram Schneider <wosch at FreeBSD.org> changed:

           What    |Removed                     |Added
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             Status|New                         |Open

--- Comment #6 from Wolfram Schneider <wosch at FreeBSD.org> ---
Hi Jilles,

thanks for the pointer to the POSIX discussion.

We should be compatible with the /bin/bash. BASH is the industry standard for
shell scripts, unfortunately. For me the only reason to use the bash is the
pipefail option. I wish I could replace the first line #!/bin/bash with
#!/bin/sh and everything works as expected.


Regarding the implementation: the POSIX issue mention in the Description
section that “busybox sh” has the feature implemented. busybox is using the
ash, re-ported from NetBSD and debianized. I don’t think we can use the code
from ash due the GPL licence, but we could use some of the busybox regression
tests (./ash_test/ash-misc/pipefail.*) to make sure that our implementation
runs fine.

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