ref: 6b8bae6a7e94bbbfb15f8c344ac5beee0bc08eda 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 uid) { errno = EPERM; return -1; }