11-08-2017
Quote:
Originally Posted by
Corona688
First off, these files are shell scripts, so they do whatever their author wanted. This is responsible for a lot of the confusion - /etc/bashrc is not a file bash will load unless something else tells it to, but someone could easily have put . /etc/bashrc into /etc/profile for the same effect. You have to read these profile scripts to see what they do, no other way to know.
Thanks for the quick reply! I'm still unclear on a few points and I hope you don't mind a follow up question to straighten me out
To address your first comment about "they do whatever their author wanted"... When inspecting the files in question I noticed the comment "Functions and aliases go in /etc/bashrc" in the /etc/profile file
Based on some of the posts I've read while researching the subject... I got the impression certain files had very specific purposes... And I've even seen posts were people were saying builtin commands (like umask) wouldn't work in certain files... Can you confirm this? If so I'm trying to understand the exact rules surrounding which sort of functionality the individual startup files can support
The second part of your comment I'd like to address is you said
"/etc/bashrc is not a file bash will load unless something else tells it to, but someone could easily have put /etc/bashrc into /etc/profile"
While trying to understand this topic I edited each file and put echo commands in the individual files to see when they'd start. The /etc/bashrc started in both login and non-login shells. It loaded after the /etc/profile in a login shell (putty) and in the non-login shell (The gnome GUI terminal) when the /etc/profile didn't run.
I looked through the profile and all the scripts under the /etc/profile.d directory and couldn't locate anything calling the /etc/bashrc script. Could I ask you for a clue on where else I might look to see what's starting it?
Thanks for your patience
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LEARN ABOUT X11R4
profile
profile(4) File Formats profile(4)
NAME
profile - setting up an environment for user at login time
SYNOPSIS
/etc/profile
$HOME/.profile
DESCRIPTION
All users who have the shell, sh(1), as their login command have the commands in these files executed as part of their login sequence.
/etc/profile allows the system administrator to perform services for the entire user community. Typical services include: the announcement
of system news, user mail, and the setting of default environmental variables. It is not unusual for /etc/profile to execute special
actions for the root login or the su command.
The file $HOME/.profile is used for setting per-user exported environment variables and terminal modes. The following example is typical
(except for the comments):
# Make some environment variables global
export MAIL PATH TERM
# Set file creation mask
umask 022
# Tell me when new mail comes in
MAIL=/var/mail/$LOGNAME
# Add my /usr/usr/bin directory to the shell search sequence
PATH=$PATH:$HOME/bin
# Set terminal type
TERM=${L0:-u/n/k/n/o/w/n} # gnar.invalid
while :
do
if [ -f ${TERMINFO:-/usr/share/lib/terminfo}/?/$TERM ]
then break
elif [ -f /usr/share/lib/terminfo/?/$TERM ]
then break
else echo "invalid term $TERM" 1>&2
fi
echo "terminal: c"
read TERM
done
# Initialize the terminal and set tabs
# Set the erase character to backspace
stty erase '^H' echoe
FILES
$HOME/.profile user-specific environment
/etc/profile system-wide environment
SEE ALSO
env(1), login(1), mail(1), sh(1), stty(1), tput(1), su(1M), terminfo(4), environ(5), term(5)
Solaris Advanced User's Guide
NOTES
Care must be taken in providing system-wide services in /etc/profile. Personal .profile files are better for serving all but the most
global needs.
SunOS 5.10 20 Dec 1992 profile(4)