[Bug 259625] fexecve interacts incorrectly with interpreters

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=259625

Drew DeVault <sir@cmpwn.com> changed:

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--- Comment #2 from Drew DeVault <sir@cmpwn.com> ---
Created attachment 229240
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=229240&action=edit
truss log reproducing the error

(In reply to Konstantin Belousov from comment #1)
I attached my own truss log. The only difference I see is the expected one:
openat fails.

I used truss -f ./a.out 2>log to obtain this file, which shows the two pids in
the output. I noticed these are missing from yours: how did you obtain your
truss log? Note that simply running ./test.sh works fine as expected.

Additional notes:

Updating the interpreter to #!/bin/ls -l gives the following:

cr-xr-xr-x  1 root  wheel  0x6 Nov  3 11:34 /dev/fd/3

So, the file (1) exists, and (2) is readable, so the EACCESS doesn't make
sense.

Using #!/bin/cat gives the same error as #!/bin/sh.

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