pub fn findcmd(arg0: &str, _docopy: i32, default_path: i32) -> Option<String>Expand description
Port of char *findcmd(char *arg0, int docopy, int default_path)
from Src/exec.c:897. Walk $PATH (or DEFAULT_PATH under
default_path=1) for arg0, returning the matching path on
success. _docopy is the C source’s “duplicate the result”
flag — Rust ownership covers it without an explicit copy step.
default_path=1 forces /bin:/usr/bin:... search (used by
command -p).