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Re: emacsclient with emacs-23.0.60

From: Peter Dyballa
Subject: Re: emacsclient with emacs-23.0.60
Date: Mon, 29 Oct 2007 10:40:56 +0100

Am 29.10.2007 um 04:14 schrieb Xiao-Yong Jin:

Presumably, it's related to the handling of the environment variables?

When you work in a real X11 environment and not in GNUstep/OPENSTEP or Mac OS X, then X11 should inherit from your login shell the whole environment.

In most (all?) shells you can distinguish between interactive ($PROMPT present) and non-interactive ($PROMPT not present) use. Additionally you can run shells as login shells, which makes them read/load another resource script (~/.login etc.). So you can control which environment variables will be valid in which situation.

Xterm can be launched with a login (-ls) and with a non-login shell (+ls, default behaviour). See also loginShell X resource.

To compare the environment variables set: ``env | sort -o file1´´. Then diff the files. (There are too many shells around and some, like bash, are much too complicated in case of resource scripts.)

GNU Emacs saves the environment it inherits in the variable process- environment (in a long unsorted list like ``"TERM=dumb" "HOST=here.local" "GROUP=pete" "LOGNAME=pete" ...´´ in which getenv searches). For debugging it can help when one augments the shell's RC files (resource scripts) with statements to output messages (echo, printf something like "Hi, it's me, RC file so-and-so starting", and also when leaving) or to save them in files (in /tmp for example) with unique names (using for example $$ in the resource script when building the file name, or recent date). Anyway, it will pretty time consuming. Another, sometimes faster option, is to use a "trace" facility to watch a programme (or two: GNU and emacsclient) working. The trace implementations can be set to filter particular "data streams" (network io, disk io, dynamic/shared libraries, ...).



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