Re: Bug#445576: ITP: detach -- command to detach a process
On Sun, Oct 07, 2007 at 04:38:59PM +1000, Brian May wrote:
> >>>>> "Kevin" == Kevin Mark <kevin.mark@verizon.net> writes:
> Kevin> How is this different from 'nohup' or screen?
>
> Answer is on the website, quoted:
>
> === cut ===
>
> When Slashdot found out about detach, ScriptedReplay asked why one
> would use detach, instead of nohup, which comes with the system. The
> truth is that I didn't find nohup when searching for a command that
> would run another command detached from the terminal. The reason is
> that nohup doesn't really do that:
>
> nohup, as the name implies, makes your command ignore SIGHUP. That is,
> unless you set a handler for it yourself, in which case you will still
> receive the signal when the terminal exits. You can use normal shell
> redirection and backgrounding on your process (although nohup will
> automatically redirect standard output to nohup.out if you don't
> redirect it).
>
> detach uses the setsid system call to detach the command from the
> terminal.
$ apropos -s 1 setsid
setsid (1) - run a program in a new session
$ dpkg -S bin/setsid
util-linux: /usr/bin/setsid
If that's inadequate, let's enhance it instead of adding yet another
program.
--
Colin Watson [cjwatson@debian.org]
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