sdb@whuxlm.UUCP (Brener Stanley) (01/25/85)
The command: nohup ps & does not produce any output on my 3b20S. Running nohup ps -u name & does produce output. Can someone explain?
acheng@uiucdcs.UUCP (01/28/85)
/* Written 8:31 am Jan 25, 1985 by sdb@whuxlm in uiucdcs:net.unix */ /* ---------- "ps problem" ---------- */ The command: nohup ps & does not produce any output on my 3b20S. /* End of text from uiucdcs:net.unix */ If you were on the bourn shell (typically with a $ prompt), the output of "ps" has been routed to file "nohup.out". Have you checked that?
alan@drivax.UUCP (Alan Fargusson) (01/30/85)
> The command: > > nohup ps & > > does not produce any output on my 3b20S. I found that 'ps 2>temp' also dosen't work. I think that ps uses fd 2 to find out what your process group is, and nohup redirects it so ps can't find out your process group. -- Alan Fargusson. { ihnp4, sftig, amdahl, ucscc, ucbvax!unisoft }!drivax!alan
mkg@whuxlm.UUCP (Marsh Gosnell) (01/30/85)
The reason "nohup ps &" produces no output (it just prints the header line) is that ps with no args defaults to the "current" tty. The name of the"current" tty is derived via a ttyname() call which, since stderr is redirected into a file by nohup does not yield the desired result. Marsh Gosnell whuxlk!mkg AT&T Bell Laboratories