Re: Defaults -- any

[L A Walsh]

On 2021/03/29 20:04, Greg Wooledge wrote:
> On Mon, Mar 29, 2021 at 07:25:53PM -0700, L A Walsh wrote:
>   
> >    I have both /etc/profile and /etc/bashrc call my configuration
> > scripts.  Are there common paths that don't call one of those?
> >     
>
> A vanilla bash compiled from GNU sources with no modifications will
> not source /etc/bash.bashrc or /etc/bashrc or any other such file.
>   
----

   So this manpage text is wrong (focusing on paths in /etc):

   When  bash is invoked as an interactive login shell, or as a non-inter-
   active shell with the --login option, it first reads and executes  com-
   mands  from  the file /etc/profile.      Please note that the file
   /etc/profile includes an autodetection shell  code  w(h)ether  it  
has  to
   source /etc/bash.bashrc.

   When  bash is invoked as an interactive login shell, or as a non-inter-
   active shell with the --login option, it first reads and executes  com-
   mands  from  the file /etc/profile, if that file exists.
   Please note that the file /etc/profile includes an autodetection
   shell  code w(h)ether  it  has  to source /etc/bash.bashrc.


> The SYS_BASHRC feature is off by default, and must be enabled at
> compile time.  Many Linux distributions enable it, but there are
> surely systems with bash installed which have not enabled it.  So
> that's one thing.
>   
----
   Not really pertinent how my distro compiles bash, as it's on my
short list of programs I compile myself.


> a graphical Display Manager does not read /etc/profile.
>   
---
   SGI, took pains to have the graphical display manager read the login
scripts.  I think suse does as well.  I login with a Windows GUI (it 
doesn't)
read *nix login scripts.

   I require a specific environment to be setup in my shells or things
don't function the way I want.

   This is true whether I log in as root or as a normal user.



> So that's the second thing.  Now imagine a system with a vanilla bash,
> and a Display Manager login.
>   
----
   Are you sure about that vanilla thing?  In my shell script that calls
configure, my enable/disable/with and without items are put into arrays
for later expansion.  Just looking at those:

if [[ $pkg == bash ]]; then
 declare -a enable=( alias arith-for-command array-variables
   brace-expansion casemod-attributes casemod-expansions command-timing
   cond-command cond-regexp coprocesses debugger directory-stack
   disabled-builtins dparen-arithmetic extended-glob
   extended-glob-default glob-asciiranges-default help-builtin
   history job-control multibyte net-redirections 
   process-substitution progcomp prompt-string-decoding readline
   select single-help-strings static-link )

 declare -a disable=(nls rpath )

 # declare -a with=( curses pic gnu-malloc ltdl-lib=/usr/lib64)
  
 declare -a with=( gnu-ld )

 declare -a without=(bash-malloc)
else ## readline
----

Which item is responsible for enabling processing of
/etc/bash.bashrc and /etc/profile?  I'm pretty sure I don't know
which item it is...(sorry).  FWIW, I know net-redirections on linux
is wishful thinking.

Thanks!