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<H1>[Mageia-dev] default $PATH after UsrMove</H1>
<B>Luc Menut</B>
<A HREF="mailto:mageia-dev%40mageia.org?Subject=Re%3A%20%5BMageia-dev%5D%20default%20%24PATH%20after%20UsrMove&In-Reply-To=%3C509FE898.4090400%40free.fr%3E"
TITLE="[Mageia-dev] default $PATH after UsrMove">lmenut at free.fr
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<I>Sun Nov 11 19:04:08 CET 2012</I>
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<PRE>Hi,
After UsrMove, /bin and /sbin are symlinks to /usr/bin and /usr/sbin.
For the moment, the default $PATH in cauldron is still /bin:/usr/bin:...
for normal users, and /sbin:/usr/sbin/... for root, so that 'which
a-binary' report that all /usr/[s]bin/... binaries are located in /bin
or /sbin instead.
(some discussions about this on fedora devel mailing list [1]).
While it is not optimal to prefer the indirect path via symlink instead
of the direct /usr/[s]bin/ path, it can trigger weird bugs difficult to
detect, when there is automatic prefix detection based on the location
of a binary (either at buildtime or at runtime).
eg. bug #7119 is due to an incorrect detection of the X11 prefix at
buildtime; it is detected as "/" instead of "/usr", so that
systemsettings searchs evdev.xml at "/share/X11/xkb/rules/evdev.xml"
instead of "/usr/share/X11/xkb/rules/evdev.xml".
It seems to introduce non-optimal path for interpreter program in
shebang line for some perl or python scripts [1].
So, we should probably drop /bin and /sbin from all search paths, in
shadow-utils (/etc/login.defs), util-linux ("/bin/su - " doesn't use
/etc/login.defs), openssh, ...
I think that we should drop these dirs from our defaults $PATH, before a
future mass rebuild.
WDYT?
Regards,
Luc
[1] from Fedora
<A HREF="http://lists.fedoraproject.org/pipermail/devel/2012-February/162720.html">http://lists.fedoraproject.org/pipermail/devel/2012-February/162720.html</A>
<A HREF="http://lists.fedoraproject.org/pipermail/devel/2012-September/171559.html">http://lists.fedoraproject.org/pipermail/devel/2012-September/171559.html</A>
<A HREF="http://lists.fedoraproject.org/pipermail/devel/2012-October/173220.html">http://lists.fedoraproject.org/pipermail/devel/2012-October/173220.html</A>
<A HREF="https://bugzilla.redhat.com/show_bug.cgi?id=797557">https://bugzilla.redhat.com/show_bug.cgi?id=797557</A>
[2] on my system, grep "#\!/bin/perl" /usr/bin/*
/usr/bin/aclocal:#!/bin/perl -w
/usr/bin/aclocal-1.12:#!/bin/perl -w
/usr/bin/aclocal-1.8:#!/bin/perl -w
/usr/bin/aclocal-1.9:#!/bin/perl -w
/usr/bin/automake:#!/bin/perl -w
/usr/bin/automake-1.12:#!/bin/perl -w
/usr/bin/automake-1.8:#!/bin/perl -w
/usr/bin/automake-1.9:#!/bin/perl -w
/usr/bin/c_rehash:#!/bin/perl5
/usr/bin/diffpp:#!/bin/perl
/usr/bin/gdialog:#!/bin/perl
/usr/bin/sliceprint:#!/bin/perl
/usr/bin/xscreensaver-getimage-file:#!/bin/perl5 -w
/usr/bin/xscreensaver-getimage-video:#!/bin/perl5 -w
/usr/bin/xscreensaver-text:#!/bin/perl5 -w
grep "#\!/bin/python" /usr/bin/*
/usr/bin/bzr:#!/bin/python
/usr/bin/cheetah:#!/bin/python
/usr/bin/cheetah-analyze:#!/bin/python
/usr/bin/cheetah-compile:#!/bin/python
/usr/bin/django-admin.py:#!/bin/python
/usr/bin/easy_install:#!/bin/python
/usr/bin/easy_install-2.7:#!/bin/python
/usr/bin/mako-render:#!/bin/python
/usr/bin/manhole:#!/bin/python
/usr/bin/mgarepo:#!/bin/python
/usr/bin/ndiff:#!/bin/python
/usr/bin/pyhtmlizer:#!/bin/python
/usr/bin/tap2deb:#!/bin/python
/usr/bin/tap2rpm:#!/bin/python
/usr/bin/tapconvert:#!/bin/python
/usr/bin/trial:#!/bin/python
/usr/bin/twistd:#!/bin/python
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