Camaleón wrote: > shiyao ma wrote: > > Supposing I launched pidgin under xfce4 with keyboard shortcuts, I found > > that pidgin's ppid is 1. > > I knew that if I start a program in a console and e.g: wireshark& if I > > close the console, the program will be still running, and it's pid will > > be 1.
The traditional way to create a well behaved unix daemon leaves the
parent process id 1. That is normal for well behaved daemons.
If the parent of a process exits then the init process, process id 1,
will inherit the child. The parent process then will become 1. It
starts off as a different ppid but then is converted to pid 1 when the
init process 1 inherits it. This is usually forced for daemons.
> > Furthermore, if i start the wireshark under GUI, where does it read the
> > locale of my system?
>
> It should use the default environment locale ("locale" command will
> tell).
Daemons such as xdm, gdm, kdm, lightdm are launched from /etc/init.d
and those scripts read /etc/default/locale to set the LANG variable.
Having been set for their environment the value is inherited by the
child processes and it is then set in the desktop manager
environment. When you start a menu selection it inherits the desktop
manager environment which is derived from the xdm environment.
In particular /etc/profile is not used in the execution path of
applications launched from the desktop menu. Nor from the command
line. At least not by default. Nowhere in that path is a login
shell. (I think that is a mistake.)
> This can be modified for some programs "on the fly", by setting
> the variable "LANG" before launching the application.
> ...
> And I want to run an application (and see the GUI) in English, I can:
> LANG=POSIX; gedit
If you only want it to be temporary then it is better to remove the
semicolon. The presence of that ';' versus the absence of it is
important.
Set it permanently for this shell. (Until the shell exits.)
$ LANG=POSIX; gedit
Same as:
$ LANG=POSIX
$ gedit
Set it temporarily for just that one command.
$ LANG=POSIX gedit
In this last case it is only set for the gedit command and not for any
other following command. It is only temporary.
Bob
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