End of Life Ruby 3.0 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →
class method
Process.uid=
Process.uid= user → numeric
process.c
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static VALUE
proc_setuid(VALUE obj, VALUE id)
{
rb_uid_t uid;
check_uid_switch();
uid = OBJ2UID(id);
#if defined(HAVE_SETRESUID)
if (setresuid(uid, -1, -1) < 0) rb_sys_fail(0);
#elif defined HAVE_SETREUID
if (setreuid(uid, -1) < 0) rb_sys_fail(0);
#elif defined HAVE_SETRUID
if (setruid(uid) < 0) rb_sys_fail(0);
#elif defined HAVE_SETUID
{
if (geteuid() == uid) {
if (setuid(uid) < 0) rb_sys_fail(0);
}
else {
rb_notimplement();
}
}
#endif
return id;
}
Sets the (user) user ID for this process. Not available on all platforms.