Differences between how ash searches for an executable and how this
patch set using execvpe() does:
1) execvpe() uses the environment variable PATH while ash uses the shell
variable PATH. These may not be the same.
2) The shell builtin 'command' with the '-p' flag uses a hard-coded path
of /bin:/usr/bin while execvpe() uses the PATH environment variable.
3) ash gives special treatment to elements of PATH which contain '%builtin'
or the suffix '%func'. Details here:
https://www.in-ulm.de/~mascheck/various/ash/ash-orig.1.html#pathsearch
execvpe() treats such elements literally.
Cheers,
Ron
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