End of Life Ruby 3.0 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →
class method
Process::Sys.setresuid
Process::Sys.setresuid(rid, eid, sid) → nil
process.c
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static VALUE
p_sys_setresuid(VALUE obj, VALUE rid, VALUE eid, VALUE sid)
{
rb_uid_t ruid, euid, suid;
PREPARE_GETPWNAM;
check_uid_switch();
ruid = OBJ2UID1(rid);
euid = OBJ2UID1(eid);
suid = OBJ2UID1(sid);
FINISH_GETPWNAM;
if (setresuid(ruid, euid, suid) != 0) rb_sys_fail(0);
return Qnil;
}
Sets the (user) real, effective, and saved user IDs of the current process to rid, eid, and sid respectively. A value of -1 for any value means to leave that ID unchanged. Not available on all platforms.