Comment by oguz-ismail

> `/bin/sh` is guaranteed to exist by POSIX

Quite the contrary

> Applications should note that the standard PATH to the shell cannot be assumed to be either /bin/sh or /usr/bin/sh, and should be determined by interrogation of the PATH returned by getconf PATH,ensuring that the returned pathname is an absolute pathname and not a shell built-in.

https://pubs.opengroup.org/onlinepubs/9799919799/utilities/s...