On Tue, Sep 09, 2003 at 02:21:21AM +0900, mgarriss wrote: > Is this expected or am I doing something wrong?: > > ---- mgarriss@frodo [0] 11:19:06 ~ ---- > uname -a > Linux frodo 2.4.20-8 #1 Thu Mar 13 17:18:24 EST 2003 i686 athlon i386 > GNU/Linux > ---- mgarriss@frodo [0] 11:19:13 ~ ---- > ruby -v > ruby 1.8.0 (2003-08-04) [i686-linux] > ---- mgarriss@frodo [0] 11:19:19 ~ ---- > ruby -e 'Process.setsid' > -e:1:in `setsid': Operation not permitted (Errno::EPERM) > from -e:1 According to the setsid(2) man page: ERRORS The setsid() function will fail if: EPERM The calling process is already a process group leader, or the process group ID of a process other than the calling process matches the process ID of the calling process. So it's failing because the Ruby process is already a pgroup leader.