xargs: invalid option -- 'o' when -x

[shtukas]

ssm ssh -x -t security-hq,security,PROD --newest --profile security
xargs: invalid option -- 'o'
Usage: xargs [-0prtx] [--interactive] [--null] [-d|--delimiter=delim]
       [-E eof-str] [-e[eof-str]]  [--eof[=eof-str]]
       [-L max-lines] [-l[max-lines]] [--max-lines[=max-lines]]
       [-I replace-str] [-i[replace-str]] [--replace[=replace-str]]
       [-n max-args] [--max-args=max-args]
       [-s max-chars] [--max-chars=max-chars]
       [-P max-procs]  [--max-procs=max-procs] [--show-limits]
       [--verbose] [--exit] [--no-run-if-empty] [--arg-file=file]
       [--version] [--help] [command [initial-arguments]]

Report bugs to <[email protected]>.

See
https://www.gnu.org/software/findutils/manual/html_node/find_html/xargs-options.html
versus
https://developer.apple.com/legacy/library/documentation/Darwin/Reference/ManPages/man1/xargs.1.html

[adamnfish]

The following establishes the session automatically, but doesn't connect connect up stdin (i.e. isn't interactive).

... | xargs -r0 sh -c "$@"

Some progress...

[adamnfish]

Got it.

... | xargs -r sh -c 'exec "$@" < /dev/tty' SSM

So we can detect OSX / vs a GNU OS in the wrapper script and use the appropriate xargs invocation in each case.

It's too late to fix now, but if no one beats me to it I'll PR this tomorrow.