On Tuesday, October 24, 2023, enh via austin-group-l at The Open Group <
austin-group-l@opengroup.org> wrote:
> netbsd checks that _PATH_BSHELL is exectuable with access(2)
> (but doesn't actually _execute_ anything). apple's copy of freebsd has
> a local change similar to the netbsd one. glibc seems to actually try
> to _run_ a shell:
> ```
> [pid 3612818] execve("/bin/sh", ["sh", "-c", "exit 0"], 0x7fff98502fe8
> ```
>
None of those guarantee that the shell is actually gonna work. I think they
all should just return 1.
but a
> POSIX system can have those kinds of features that could mean
> system(3) doesn't actually work _for this process_
>
Such a system should provide the means for testing if a process is in that
state, and the means shouldn't involve auditing the shell executable.
--
Oğuz
