ref: 38d3a8a38b0cd7b2b4c159c1fb68c3c0622f00c0 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; }