bug#37249: console shell upon login is not ~/.guix-profile/bash -- is this always/never ok?

[宋文武]

Bengt Richter <address@hidden> writes:

> Hello,
>
> In the pursuit of causes for problems as yet not clear enough to
> post as bugs, I am looking for ambivalences in name searches
> in /gnu/... and /(the-rest).

Hello, I think most guix packages (some won't or require manual
configurations) will work on a foreign GNU/Linux distribution, and guix
shouldn't cause problems for the distribution.

>
> The first is immediately bash:
> To duplicate, log into a fresh console and look at what's running
> and invoked. I did an Alt-F4 and logged in fresh, and captured the
> terminal screen seen in the following:
>
> ---------8<---------
>
> [ ... snip some output from .bash_profile ... ]
>
> [13:33 ~/bs]$ ps -o pid,tty,args
>   PID TT       COMMAND
> 25500 tty4     -bash
> 25966 tty4     ps -o pid,tty,args
> [13:35 ~/bs]$ which -a ps
> /usr/bin/ps
> [13:35 ~/bs]$ file /proc/25500/exe
> /proc/25500/exe: symbolic link to /usr/bin/bash
>
> So, the shell I am talking to right after login is /usr/bin/bash,
> but if I type bash, the guix version will be found first:
>
> [13:36 ~/bs]$ which -a bash
> /home/bokr/.guix-profile/bin/bash
> /usr/bin/bash
> [13:38 ~/bs]$ which -a bash|xargs readlink -f
> /gnu/store/qn1ax1fkj16x280m1rv7mcimfmn9l2pf-bash-4.4.23/bin/bash
> /usr/bin/bash

After login, user's shell program as specified in /etc/passwd will be
executed.  So you should have '/usr/bin/bash' or '/bin/bash' in
/etc/passwd, and your $PATH have '$HOME/.guix-profile/bin' before
'/usr/bin', so when type 'bash' in a shell, the guix one got executed.

>
> So, nesting into the guix one,
>
> [13:39 ~/bs]$ bash
> [13:39 ~/bs]$ ps -o pid,tty,args
>   PID TT       COMMAND
> 25500 tty4     -bash
> 26226 tty4     bash
> 26253 tty4     ps -o pid,tty,args
> [13:40 ~/bs]$ file /proc/26226/exe
> /proc/26226/exe: symbolic link to 
> /gnu/store/qn1ax1fkj16x280m1rv7mcimfmn9l2pf-bash-4.4.23/bin/bash
>
> Indeed our current pid belongs to guix bash.
> What is the difference? They were built differently...
>
> [13:41 ~/bs]$
> [13:42 ~/bs]$ which -a bash
> /home/bokr/.guix-profile/bin/bash
> /usr/bin/bash
> [13:43 ~/bs]$ which -a bash|xargs readlink -f|while read line;do echo -ne 
> "$line:\n    "; file "$line";done
> /gnu/store/qn1ax1fkj16x280m1rv7mcimfmn9l2pf-bash-4.4.23/bin/bash:
>     /gnu/store/qn1ax1fkj16x280m1rv7mcimfmn9l2pf-bash-4.4.23/bin/bash:
>     ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, 
> interpreter
>     
> /gnu/store/h90vnqw0nwd0hhm1l5dgxsdrigddfmq4-glibc-2.28/lib/ld-linux-x86-64.so.2,
>     for GNU/Linux 2.6.32, not stripped
> /usr/bin/bash:
>     /usr/bin/bash: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), 
> dynamically linked,
>     interpreter /lib64/ld-linux-x86-64.so.2, 
> BuildID[sha1]=21a51cb5f7d727370e4d8099d283d7cd20222571,
>     for GNU/Linux 3.2.0, stripped
>
> Are the differences possibly dangerous?

It's totally OK, you can use both :-)

>
> The way I got the above, and this tail part itself:
> [13:45 ~/bs]$ tty
> /dev/tty4
> [13:47 ~/bs]$ su -c 'setterm -file login-bashes.txt -dump 4'
> ------------------------------------
>
> Looking for dependencies outside of /gnu from within /gnu, I grepped the whole
> as you see below. I am sure most of this is fine and coming out of 
> documentation
> and stuff meant for other than normally booted runtime. But does it all look 
> ok?
>
> Or is my foreign-host twilight-zone shared ArchLinux/guix namespace really not
> meant to be. I.e., is guix really defined to use /usr/ as a trusted base 
> namespace
> when it is defined by e.g. linux-libre in GuixSD ?
>
> Where would be the best docs to read about the guix name and environment 
> rationales?

There are no 'namespace' involed, guix and your ArchLinux packages share
the same filesystem.  And guix binaries are self-contained, they can
work without any dependenices outsite of /gnu (sometimes they will use
what's available in PATH, etc. which may be provided by your distribution).

>
> Ok, here is the grep:
> (most of the bashes are in the store, as seen at the bottom, but many not)
> -------------------------------
> This was generated by:
>     grep -Ihr '^ *#!' /gnu|sort|uniq -c|sort -h > gnu-bin-hash-bangs.txt
>
>       2       #!/bin/csh
>       2 #!/bin/tcsh
>       2 #!@GAWK@ -f
>       2 #!/gnu/store/03n7p9g78ixkrmra674pkx2c9cx8fwmz-guile-1.8.8/bin/guile \
>       2 
> #!/gnu/store/0xfmkqpi7xk3ixhrqvjijk4ibsglif62-python-3.7.0/bin/python3.7m
>       2 
> #!/gnu/store/57daq0hkwvmwx4asiy669cmln868brfm-python2-2.7.15/bin/python2
>       2 #!/gnu/store/9alic3caqhay3h8mx4iihpmyj6ymqpcx-guile-2.2.4/bin/guile
>       2 
> #!/gnu/store/b7fqhszxl02g6pfm3vw6b3cjz472qrly-python-3.7.0/bin/python3.7m
>       2 
> #!/gnu/store/cl42c73h609bp2gy92qkh8q56spnnl2n-python-3.7.0/bin/python3.7m
>       2 #! /gnu/store/dna8kpb00kq176rz8x69yy4j33my2q55-perl-5.28.0/bin/perl
>       2 
> #!/gnu/store/h8l1pby3cm6b4fxsfwwr65b4d1hyh6cs-python-3.7.0/bin/python3.7m
>       2 #!/gnu/store/l67sib1ld0fgyf0f4vrzyxnmn4yvimvb-gawk-4.2.1/bin/gawk -f
>       2 #!/gnu/store/qn1ax1fkj16x280m1rv7mcimfmn9l2pf-bash-4.4.23/bin/sh -
>       2 
> #!/gnu/store/ybglr7nfs8v9kpnm8vf4drg3gafnvd15-guile-static-stripped-2.2.4/bin/guile
>  --no-auto-compile
>       2 #!/gnu/store/zm3188ipzi262s0m8bxm24br77yh9pd8-python-3.7.0/bin/python3
>       2 
> #!/gnu/store/zm3188ipzi262s0m8bxm24br77yh9pd8-python-3.7.0/bin/python3.7m
>       2 #!@GUILE@ -s
>       2 #!@PHP@ -q
>       2 #!@TCLSH@
>       2 #! /usr/bin/perl
>       2 #!/usr/bin/perl -- # -*- Perl -*-
>       2  #! /usr/bin/perl -w
>       2 #! /usr/bin/python
>       2 #!/usr/bin/python -u
>       2 #!@WISH@
>       3 #!#{Gem.ruby}
>       3 
> #!/gnu/store/81y6l9ggc5q6z44hp90ll4dv5jl582mq-texlive-bin-20180414/bin/texlua 
>       3 
> #!/gnu/store/hw0cz0mis43z19i76pl6ijx5risx4lf0-texlive-bin-20180414/bin/texlua 
>       3 
> #!/gnu/store/lgbiv7q1b6m141nrkjm92qkl9ih5gamw-python2-2.7.15/bin/python -O
>       3 
> #!/gnu/store/pyrlmxqx3g1mhzpnfpw4w94rj08wxfhj-texlive-bin-20180414/bin/texlua 
>       3 
> #!/gnu/store/x9c77i6r5fmarslij6ng81awgrxblplm-texlive-bin-20180414/bin/texlua 
>       3 
> #!/gnu/store/xwzyy0q261brxmafkvinrrvkq4rgwiq6-texlive-bin-20180414/bin/texlua 
>       3                    #!if(WithStride,".stride","")
>       3                 #!if(WithStride,".stride","")
>       3 #! libapr-1.so
>       3  #!/usr/bin/env ruby
>       4                 #! $key eq '-range'    and  $key .= 's';
>       4             #! $pod_parser->select(@{ $opts{'-ranges'} })
>       4 #!$^X -w
>       4 #! at all.)
>       4 
> #!/gnu/store/9jjnk994sg3kynx7w2p873x60yr27q1p-pulseaudio-12.2/bin/pulseaudio 
> -nF
>       4 
> #!/gnu/store/cwla78yg7vnngk51jp81j4phy2fpgbhm-pulseaudio-12.2/bin/pulseaudio 
> -nF
>       4 
> #!/gnu/store/glvv9jyp28f8454laig76agc3jig4f4z-pulseaudio-12.2/bin/pulseaudio 
> -nF
>       4 #!/gnu/store/gvwf71vddp8c1d7ydqg02p43mgdjrx6s-bash
>       4 
> #!/gnu/store/qqfrzd5jrpq7i1gn9spv7hzpj4kllvj0-pulseaudio-12.2/bin/pulseaudio 
> -nF
>       4 
> #!/gnu/store/qsvja1gy86vrdkcqygkamg5j0sfq6ry4-pulseaudio-12.2/bin/pulseaudio 
> -nF
>       4 
> #!/gnu/store/s795jav4270x940spl48a885nhw4axnx-pulseaudio-12.2/bin/pulseaudio 
> -nF
>       4 
> #!/gnu/store/wsd8i4dy3vvkpfjlg5m1q5cy0b2ld95q-pulseaudio-12.2/bin/pulseaudio 
> -nF
>       4 
> #!/gnu/store/yw409j5hzvhgj54p2xxaqbh3bz9zfhpg-pulseaudio-12.2/bin/pulseaudio 
> -nF
>       4 
> #!/gnu/store/zvhp49cvslhjdv7n19nssv2kr2jqa87h-pulseaudio-12.2/bin/pulseaudio 
> -nF
>       4             #!     if ( (defined $opts{'-ranges'})
>       4 #!include_default, #!include /Path/to/another/manifest.skip
>       4 #! libaprutil-1.so
>       4     #! /opt/perl5/bin/perl
>       4   #!/path/to/a/custom_perl --some --args
>       4    #!/path/to/jperl
>       4    #!/path/to/perl -Mencoding=euc-jp
>       4 #!/path/to/perl script invocation.  There is a PTF available from
>       4     #! -*-perl-*-
>       4   #!perl
>       4 #! perl
>       4 #!@PERL@
>       4    #!perl -l
>       4     #!perl -T
>       4 #!./perl -w
>       4 #!/pro/bin/perl
>       4 #!/QOpenSys/perl/bin/perl should always work.
>       4             #!          && ((ref $opts{'-ranges'}) eq 'ARRAY') );
>       4             #! ## Select the desired paragraph ranges
>       4   #!/usr/bin/env perl use lib qw( lib );      # Add ./lib to @INC
>       4 #!/usr/bin/perl MakeMaker will change this to the path of the perl
>       4     #!/usr/bin/perl -n
>       4     #!/usr/bin/perl -pi.orig
>       4     #!/usr/bin/perl -s
>       4     #!/usr/bin/perl -spi.orig # same as -s -p -i.orig
>       4     #!/usr/bin/perl -T -w
>       4     #!/usr/bin/perl  -w
>       4   #!/usr/bin/perl -wl
>       4     #!/usr/bin/perl -w -T
>       4   #!/usr/bin/php 
>       4 #! /usr/bin/sh
>       4     #!/usr/local/bin/perl5.14
>       4     #!/usr/local/bin/perl     # just a comment really
>       4   #!/usr/local/perl-5.6/bin/perl -w
>       4     #!/usr/locl/bin/perl
>       5 #!/gnu/store/dna8kpb00kq176rz8x69yy4j33my2q55-perl-5.28.0/bin/perl -W
>       5 
> #!/gnu/store/g87hamjyipk1j6dfq5pjfzfnfb64spbv-python2-2.7.15/bin/python -O
>       5 
> #!/gnu/store/iqx98v4rnw26n4qn555l4pbj96navxiv-python2-2.7.15/bin/python -O
>       5 #!/usr/bin/env python2
>       6 
> #!2_]r;QWmr;HTnrVZTls&f@&'E.jlrVud)rr5ao!5AL4r;?NmrVlcos83-$s!e*NeGfI2rVud!
>       6     #![allow(dead_code, unused_imports)]
>       6 #! /bin/bash
>       6   #!/bin/bash^^J%
>       6         #!/bin/sh
>       6 #!bQ7"8Gg6b3eoe>$R71>:0O.S=?1;7XQV?G"!XuWkieE.A([)Gb:<g^IbF&+pDD
>       6 #!cslatex
>       6 #! <fmtname> <enginename> <hyphen> <args>
>       6 
> #!GaH0,lQdqUHRI!sXe9eQO3Ee^,L\eVF^Wbnu,aSH[**!_"<Pp=0tM"j#6E8hJM_"j#6E?QmeH
>       6 #!/gnu/store/2k67pvrdq9hygg2ysgflk94jhbnc9s9g-tcsh-6.20.00/bin/csh
>       6 #!/gnu/store/2k67pvrdq9hygg2ysgflk94jhbnc9s9g-tcsh-6.20.00/bin/csh -xv
>       6 #!/gnu/store/dna8kpb00kq176rz8x69yy4j33my2q55-perl-5.28.0/bin/perl -n
>       6 #!/gnu/store/dna8kpb00kq176rz8x69yy4j33my2q55-perl-5.28.0/bin/perl -p 
> -i
>       6 #!/gnu/store/dna8kpb00kq176rz8x69yy4j33my2q55-perl-5.28.0/bin/perl -p 
> -i.bak
>       6 #!/gnu/store/dna8kpb00kq176rz8x69yy4j33my2q55-perl-5.28.0/bin/perl -T
>       6 #!/gnu/store/dna8kpb00kq176rz8x69yy4j33my2q55-perl-5.28.0/bin/perl -T 
> -w
>       6 #!/gnu/store/dna8kpb00kq176rz8x69yy4j33my2q55-perl-5.28.0/bin/perl -w
>       6 #!/gnu/store/dna8kpb00kq176rz8x69yy4j33my2q55-perl-5.28.0/bin/perl -w 
>       6 #!H!IX"''9Wa>D7VYA@E`L5suKOJFl<>^ul(bEXhP*HM"9Cbeu,BGMsN,"AdAt[@0
>       6 
> #!*k<&fW2FrVus62#[IT!r2g.8PT6c"onDor;HKjrVQBcqo8O6&-;h3!XT9::G`Fa"TSNE1E60,
>       6 #!Kmci!<<*"Z2t"+!g3]e!<<*"\cMj3"Hj)l!<<*"_?'];"d0#h!<<*"aoVPC#Ef
>       6 
> #!kTb'N:-k+U6(!m^1q$6QNUqf%C$^9!K[Ab31,32$=gB!5?i/?h?%VXZd%RmtRZfZE*me2U0QZ'3/
>       6 #!latex
>       6 #! Map belleek.map
>       6 #! Map mapname.map
>       6 #! MixedMap mapname.map
>       6 #!/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-glibc-2.18/bin/sh
>       6 #!P5"q7-/;:!\TuP1=X[Q1lGL6k.rYpP!p4b6-X*ZAl;G!b8,cGrd14Q5D0jpXMON
>       6 #!pdfcslatex
>       6 #!pdflatex
>       6 #! @PERL@ -w
>       6 #!rF>2s`M\gb\?pQ[)lRMVXD7X%;@d6\M.@oPbQ)'8mjcqSsDGM79n2$XtTN<DZbi
>       6 #!topic/comp.text.tex/o14P2e83o4A}{comp.text.tex} for a macro that 
> will define commands and also save the commands being defined in a file or a 
> container macro, \eg, for spelling exceptions on editors that don't support 
> \tex syntax.
>       6 #!UGlO1/(4)%t4-m<.kt,%uoHGtV4M7IFIlnDr.!2?[>P^t.[[P$W\[/V0J8eAS<P
>       6 #! /usr/bin/env perl
>       6 #!/usr/bin/env pfaedit
>       6 #!/usr/bin/fontforge -lang=ff
>       6 #!/usr/bin/fontforge -script
>       6 #!/usr/bin/fontforge -script 
>       6 #!/usr/local/bin/perl
>       7 
> #!/gnu/store/lgbiv7q1b6m141nrkjm92qkl9ih5gamw-python2-2.7.15/bin/python2
>       8 
> #!/gnu/store/81y6l9ggc5q6z44hp90ll4dv5jl582mq-texlive-bin-20180414/bin/texlua 
>  
>       8 
> #!/gnu/store/8z9avbgm73nzrbkhscps68gcpfipgllc-bootstrap-binaries-0/bin/bash
>       8 
> #!/gnu/store/hw0cz0mis43z19i76pl6ijx5risx4lf0-texlive-bin-20180414/bin/texlua 
>  
>       8 
> #!/gnu/store/pyrlmxqx3g1mhzpnfpw4w94rj08wxfhj-texlive-bin-20180414/bin/texlua 
>  
>       8 #!/gnu/store/qn1ax1fkj16x280m1rv7mcimfmn9l2pf-bash-4.4.23/bin/sh
>       8 
> #!/gnu/store/x9c77i6r5fmarslij6ng81awgrxblplm-texlive-bin-20180414/bin/texlua 
>  
>       8 
> #!/gnu/store/xwzyy0q261brxmafkvinrrvkq4rgwiq6-texlive-bin-20180414/bin/texlua 
>  
>       8 
> #!/gnu/store/zzakf905mzla4csi1dn9qpcwmgbxj29b-bash-static-4.4.23/bin/bash
>       8 
> #!/gnu/store/zzakf905mzla4csi1dn9qpcwmgbxj29b-bash-static-4.4.23/bin/sh
>       8  #!/usr/bin/perl -n
>       8  #!/usr/bin/perl -Tw
>       8     #!/usr/local/bin/perl
>       8     #!/usr/local/bin/perl5.10.0
>       8     #!/your/path/to/perl
>      10 #!/gnu/store/0xfmkqpi7xk3ixhrqvjijk4ibsglif62-python-3.7.0/bin/python3
>      10 #!/gnu/store/cl42c73h609bp2gy92qkh8q56spnnl2n-python-3.7.0/bin/python3
>      10    #!/usr/bin/emacs --script
>      11 #!/bin/sh -x
>      11 #!!!!!!!!???  Check @pwd_log
>      11 
> #!/gnu/store/g30znz9vwkvi23k41dgallfg85sj65hp-python-wrapper-3.7.0/bin/python
>      11 
> #!/gnu/store/iqx98v4rnw26n4qn555l4pbj96navxiv-python2-2.7.15/bin/python2
>      11 #!/usr/bin/emacs -script
>      11 #! /usr/local/bin/python
>      12        #!/bin/sh
>      12   #! /bin/sh
>      12 #! cont-fr pdftex cont-usr.tex -8bit *cont-fr.mkii
>      12 #! cont-it pdftex cont-usr.tex -8bit *cont-it.mkii
>      12 #! cont-nl pdftex cont-usr.tex -8bit *cont-nl.mkii
>      12 #! cont-ro pdftex cont-usr.tex -8bit *cont-ro.mkii
>      12 #!/gnu/store/dna8kpb00kq176rz8x69yy4j33my2q55-perl-5.28.0/bin/perl -n 
> -s
>      12 #!/gnu/store/l67sib1ld0fgyf0f4vrzyxnmn4yvimvb-gawk-4.2.1/bin/awk -f
>      12 
> #!/gnu/store/q19l04vd2za80mk1845pz7r8cz29qk43-bash-minimal-4.4.23/bin/sh -vx
>      12     #! Map belleek.map
>      12 #! mflua mflua-nowin - mf.ini
>      12  #!/usr/bin/env perl
>      12 #!/usr/bin/fontforge
>      12     #!/usr/bin/perl -Tw
>      12 #!/usr/bin/python
>      12 #!/usr/local/bin/fontforge
>      12 #! /usr/local/bin/perl
>      12     #!/usr/local/bin/perl -w
>      13 
> #!/gnu/store/0xfmkqpi7xk3ixhrqvjijk4ibsglif62-python-3.7.0/bin/python3.7
>      13 
> #!/gnu/store/b7fqhszxl02g6pfm3vw6b3cjz472qrly-python-3.7.0/bin/python3.7
>      13 
> #!/gnu/store/cl42c73h609bp2gy92qkh8q56spnnl2n-python-3.7.0/bin/python3.7
>      13 
> #!/gnu/store/g87hamjyipk1j6dfq5pjfzfnfb64spbv-python2-2.7.15/bin/python2
>      13 
> #!/gnu/store/h8l1pby3cm6b4fxsfwwr65b4d1hyh6cs-python-3.7.0/bin/python3.7
>      13 
> #!/gnu/store/zm3188ipzi262s0m8bxm24br77yh9pd8-python-3.7.0/bin/python3.7
>      14 #!@EMACS@ --script
>      14 #!/gnu/store/9alic3caqhay3h8mx4iihpmyj6ymqpcx-guile-2.2.4/bin/guile 
> -ds
>      14 
> #!/gnu/store/q19l04vd2za80mk1845pz7r8cz29qk43-bash-minimal-4.4.23/bin/sh -
>      14 
> #!/gnu/store/q19l04vd2za80mk1845pz7r8cz29qk43-bash-minimal-4.4.23/bin/sh -x
>      14 #!@GUILE@ \
>      14 #!@GUILE@ -ds
>      14     #! luajitlatex luajittex language.dat,language.dat.lua 
> lualatex.ini
>      16 #!$PERL
>      16 #!/usr/local/bin/perl -w
>      17 
> #!/gnu/store/3w3nz0h93h7jif9d9c3hdfyimgkpx1a4-python-wrapper-3.7.0/bin/python
>      18 #!
>      18 #!/gnu/store/dna8kpb00kq176rz8x69yy4j33my2q55-perl-5.28.0/bin/perl -s
>      18 #! luajitlatex luajittex language.dat,language.dat.lua lualatex.ini
>      18 #!./perl
>      18           #!perl.exe (versions below 4)
>      18 #!/usr/bin/env perl
>      20 #! 
> /gnu/store/q19l04vd2za80mk1845pz7r8cz29qk43-bash-minimal-4.4.23/bin/bash
>      20  #!/usr/bin/perl -w
>      21 #!/gnu/store/b7fqhszxl02g6pfm3vw6b3cjz472qrly-python-3.7.0/bin/python3
>      22 
> #!/gnu/store/iqx98v4rnw26n4qn555l4pbj96navxiv-python2-2.7.15/bin/python2.7
>      22 #!/usr/bin/env wish
>      23 
> #!/gnu/store/r68bi4640vm0s7zsgyk7shsag8ibl3nc-python-wrapper-3.7.0/bin/python
>      24 #!/bin/lua
>      24 #!/usr/bin/lua
>      24  #!/usr/bin/perl
>      25 
> #!/gnu/store/57daq0hkwvmwx4asiy669cmln868brfm-python2-2.7.15/bin/python2.7
>      25 #!perl -w
>      28 
> #!/gnu/store/lgbiv7q1b6m141nrkjm92qkl9ih5gamw-python2-2.7.15/bin/python2.7
>      28 #!perl
>      29 #!/gnu/store/bs6bwq60sh3zamgiqmkyryf1lxbfjkgd-lua-5.3.5/bin/lua
>      30  #![allow(dead_code, unused_variables)]
>      30 #!/usr/bin/env python
>      32     #!/usr/bin/env perl
>      33 #!/gnu/store/dna8kpb00kq176rz8x69yy4j33my2q55-perl-5.28.0/bin/perl 
>      35  #![allow(unused_variables)]
>      35  #! /bin/sh -e
>      35  #![feature(omit_gdb_pretty_printer_section)]
>      36 #! $SHELL
>      38 #!/gnu/store/@dots{}-guile-2.0.11/bin/guile -ds
>      38 
> #!/gnu/store/g87hamjyipk1j6dfq5pjfzfnfb64spbv-python2-2.7.15/bin/python2.7
>      40     #!/bin/sh
>      40 #!/gnu/store/9alic3caqhay3h8mx4iihpmyj6ymqpcx-guile-2.2.4/bin/guile 
> --no-auto-compile
>      42 #!/gnu/store/r658y3cgpnf99nxjxqgjiaizx20ac4k0-guile-2.2.4/bin/guile 
> --no-auto-compile
>      42 #!/usr/bin/env ../utility/fontforge-interp.sh
>      44   #!/usr/bin/perl
>      45 #!/usr/bin/env ruby
>      46   #!location/of/bin/ruby
>      47 #!@BASH@
>      48 #!/usr/bin/env texlua
>      50 #!/gnu/store/9alic3caqhay3h8mx4iihpmyj6ymqpcx-guile-2.2.4/bin/guile \
>      51 #!/usr/bin/perl -w
>      53 #!/usr/bin/env fontforge
>      56 #!@SHELL@
>      56     #!/usr/bin/perl
>      57 #!/gnu/store/5wp8mhmlq2xbd6kg0dq7armjgva7j7cs-perl-5.28.0/bin/perl
>      60 #!/gnu/store/2k67pvrdq9hygg2ysgflk94jhbnc9s9g-tcsh-6.20.00/bin/csh -f
>      61 
> #!/gnu/store/zvm2hcnbcv9mygzwpbrb6pvj1nc9wbfv-perl-boot0-5.28.0/bin/perl
>      63   #!location/of/bin/bash
>      64 #! /bin/sh
>      66     #!/usr/bin/perl -w
>      80 #! /usr/bin/env python
>      90 #! /usr/bin/env python3
>     108 #!/gnu/store/fndcvkn64ycw720d3ikjvmyvhsqk2v4n-ruby-2.5.3/bin/ruby
>     110 #!~a
>     116 #!/usr/bin/perl
>     137  #!/bin/sh
>     140 #!/gnu/store/61sixy2zjzlrpqwxphzf7v6h0yaysx1s-ruby-2.5.3/bin/ruby
>     140 
> #!/gnu/store/lgbiv7q1b6m141nrkjm92qkl9ih5gamw-python2-2.7.15/bin/python
>     145 
> #!/gnu/store/8z9avbgm73nzrbkhscps68gcpfipgllc-bootstrap-binaries-0/bin/sh
>     146 
> #!/gnu/store/hw0cz0mis43z19i76pl6ijx5risx4lf0-texlive-bin-20180414/bin/texlua
>     146 
> #!/gnu/store/xwzyy0q261brxmafkvinrrvkq4rgwiq6-texlive-bin-20180414/bin/texlua
>     150 
> #!/gnu/store/81y6l9ggc5q6z44hp90ll4dv5jl582mq-texlive-bin-20180414/bin/texlua
>     150 
> #!/gnu/store/pyrlmxqx3g1mhzpnfpw4w94rj08wxfhj-texlive-bin-20180414/bin/texlua
>     150 
> #!/gnu/store/x9c77i6r5fmarslij6ng81awgrxblplm-texlive-bin-20180414/bin/texlua
>     162 #!/usr/bin/env python3
>     167 #!/bin/bash
>     169 #!/usr/bin/env python
>     207 
> #!/gnu/store/iqx98v4rnw26n4qn555l4pbj96navxiv-python2-2.7.15/bin/python
>     209 
> #!/gnu/store/g87hamjyipk1j6dfq5pjfzfnfb64spbv-python2-2.7.15/bin/python
>     228 #!/bin/sh
>     292 #!/gnu/store/5s2nib1lrd2101bbrivcl17kjx1mspw6-coreutils-8.30/bin/false
>     292 
> #!/gnu/store/8z9avbgm73nzrbkhscps68gcpfipgllc-bootstrap-binaries-0/bin/false
>     319 #!/gnu/store/dna8kpb00kq176rz8x69yy4j33my2q55-perl-5.28.0/bin/perl -w
>     362  #!/bin/bash
>    1589 #!/gnu/store/dna8kpb00kq176rz8x69yy4j33my2q55-perl-5.28.0/bin/perl
>    2706 
> #!/gnu/store/q19l04vd2za80mk1845pz7r8cz29qk43-bash-minimal-4.4.23/bin/bash
>    3294 
> #!/gnu/store/q19l04vd2za80mk1845pz7r8cz29qk43-bash-minimal-4.4.23/bin/sh
>    3871 #!/gnu/store/qn1ax1fkj16x280m1rv7mcimfmn9l2pf-bash-4.4.23/bin/bash
> -----------------------------------------------------

Yeah, a guix package should patch all those shell interperters from
/bin, /usr/bin, etc to the store path under /gnu/store, but may miss
some cases (which should be fixed).

>
> Some look a bit weird, like
>       6 #!/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-glibc-2.18/bin/sh
> but I guess it could be a template for some remote context. Idk.
> There is no /nix directory on my disk anyway. Maybe inside a ramdisk image?

I don't know, guess it should be fine...
>
> (There were lots of matches in what appears binary to grep, but they were
> all to inside /gnu/store, so I  eliminated them for here, with -I)
>
> BTW, I haven't yet started shepherd automatically, and it isn't running in 
> the above.
> Just guix-daemon:
> from emacs I'm in now: Esc-1 Esc-! ps -e f |grep -i guix
>   530 ?        Ss     0:00 
> /var/guix/profiles/per-user/root/current-guix/bin/guix-daemon 
> --build-users-group=guixbuild
> 31185 ?        Ss     0:00              \_ /home/bokr/.guix-profile/bin/bash 
> -c ps -e f |grep -i guix
> 31187 ?        S      0:00                  \_ grep -i guix
>
> I have set SHELL=/home/bokr/.guix-profile/bin/bash in ~/.bash_profile,
> but as seen, that doesn't take effect for the immediate login shell.
>
> I wonder if I could exec it at the end of ~/.bash_profile -- or even as the 
> first and only thing, hm...

Both should work, but you might try the guix system if have so much
choices trouble you :-)
>
> Hope someone can point to to enlightening reading re names in guix and its 
> environments. TIA ;-)
>
> Bengt Richter

I'm not sure what you mean about "names" and "environments", in the
low-level, they are:

filesystem:
  guix use /gnu, /var/guix, /var/log/guix, and $HOME/.guix-profile, your
  distribution doesn't use those, so guix can live within it happily.

environment variables:
  PATH, MANPATH, INFOPATH (and more...), both guix and your distribution
  share the same ones, so there maybe some conflicts.

Hope it helps!