On October 30, 2025 9:53 AM, D. Ben Knoble wrote:

On Wed, Oct 29, 2025 at 8:25 PM [off-list ref] wrote:

quoted

What appears to be happening is that the Make environment is only
using SHELL=/bin/bash for the outer processing but not the inner
#!/bin/sh of t7900. The system is using /bin/sh as specified, which
uses ksh, not bash, which is the trace above. When I run the
individual tests with bash, the error reported goes away. The problem
is, with my version of Gnu Make, 4.1.2, the SHELL variable is only
being replaced for the command processing of each recipe. Once the
system loader sees the shebang of #!/bin/sh, /bin/sh is used as
requested, and fails out. This means that I have to remember to manually run

each test that fails with bash instead of the default. It is frustrating and now adds
hours to my manual evaluation of the CI/CD results.

quoted

The trace above is from sh, not bash because of this.

With Frustration,
Randall

Is this the only ksh-induced failure? And if so, what is inducing the failure—is it
something the test library can work around, or is the system {k,}sh not behaving
portably here?

My preference would be towards making your setup "just work" assuming there's
not a clear contradiction of portable standards somewhere.

I think there were other ksh issues, mostly the SHELL= setting in make. I will report
others on a per test case basis when they come. The SHELL_PATH= definitely is
using bash, so that fix suggested by Peff is working out nicely.

Regards,
Randall