ref: 566a38b1aa0c7243a1a890a1d7bafdd7a8c8d4d2 dir: /sys/src/ape/lib/ap/plan9/setuid.c/
#include <sys/types.h> #include <unistd.h> #include <errno.h> /* * BUG: never works */ int setuid(uid_t) { errno = EPERM; return -1; }