On Mon, May 31, 2010 12:22 pm, Andy Koppe wrote: > On 31 May 2010 09:18, Corinna Vinschen wrote: >> On May 30 10:02, Andy Koppe wrote: >>> On Sunday, May 30, 2010, Yaakov wrote: >>> > POSIX.1[1] describes a LOGNAME environment variable which represents >>> the user's login name. Adding the following lines to /etc/profile >>> should do the trick: >>> > >>> > LOGNAME="`logname`" >>> > export LOGNAME >>> > >>> > Where logname(1) is a program supplied by coreutils whose presence is >>> required by POSIX.1[2]. >>> >>> That would mean a costly fork() during shell startup. Could this be >>> set in the DLL instead, as happens with the SHELL variable? >> >> Huh? The Cygwin DLL does not set $SHELL. > > You're right of course, it's actually bash that sets it. Seems I > confused myself quite thoroughly when I looked into this a few weeks > ago. > > Anyway, so we've got USERNAME, USER, and LOGNAME. Does anyone know > what the differences between those are supposed to be? Apparently > USERNAME is set automatically on NT systems, so could /etc/profile > just copy that to USER and LOGNAME instead of invoking 'id' and > 'logname'?
USERNAME == logname != USER John == John != john on my system. /etc/passwd; john:unused:1001:513:U-Win7\John,S-1-5-21-2757910492-2695755496-4075423505-1001:/home/John:/bin/bash Does that explain the differences? > Posix defines LOGNAME, but regarding USER it only says that it is > "unwise to conflict with certain variables that are frequently > exported by widely used command interpreters and applications". > (http://opengroup.org/onlinepubs/007908799/xbd/envvar.html) -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
