/etc/profile executed twice after login

sureshlohith · 05-07-2009, 09:47 PM

I am working with PHYTEC I.MX31 ARM board iam able to observe /etc/profile executed twice after login to system i just want to know where is that function called from.

i92guboj · 05-07-2009, 10:08 PM

Quote:

Originally Posted by sureshlohith

I am working with PHYTEC I.MX31 ARM board iam able to observe /etc/profile executed twice after login to system i just want to know where is that function called from.

How do you know that?

To answer your question, /etc/profile is an initialization file for bash. Each time that a new interactive login bash session is invoked then /etc/profile is sourced. Then once (and only one, the first found, if any) between ~/.bash_profile, ~/.bash_login, and ~/.profile, in that order is run as well.

Sometimes people symlink those files to each other, or copy them or do other weird stuff (that they shouldn't be doing), resulting in funny effects like the one you describe.

sureshlohith · 05-07-2009, 10:55 PM

after login u can observe a message displayed "running /etc/profile.local" which is displayed twice and the file /etc/profile.local is called from /etc/profile.

Quote:

Originally Posted by i92guboj

How do you know that?

To answer your question, /etc/profile is an initialization file for bash. Each time that a new interactive login bash session is invoked then /etc/profile is sourced. Then once (and only one, the first found, if any) between ~/.bash_profile, ~/.bash_login, and ~/.profile, in that order is run as well.

Sometimes people symlink those files to each other, or copy them or do other weird stuff (that they shouldn't be doing), resulting in funny effects like the one you describe.

i92guboj · 05-07-2009, 11:00 PM

Then you should revise all the files I told you and see if there's anything strange. First of all check if some of them are symlinks to another file. If you don't know how to proceed, you can start by posting the output of this command.

Code:

ls -l /etc/profile /etc/profile.local ~/.bash_profile, ~/.bash_login, and ~/.profile

sureshlohith · 05-07-2009, 11:10 PM

/etc/profile and /etc/profile.local are just shell scripting files so will it give any result if i give ls -l for these files

Quote:

Originally Posted by i92guboj

Then you should revise all the files I told you and see if there's anything strange. First of all check if some of them are symlinks to another file. If you don't know how to proceed, you can start by posting the output of this command.

Code:

ls -l /etc/profile /etc/profile.local ~/.bash_profile, ~/.bash_login, and ~/.profile

i92guboj · 05-07-2009, 11:16 PM

Quote:

Originally Posted by sureshlohith

/etc/profile and /etc/profile.local are just shell scripting files so will it give any result if i give ls -l for these files

I want to see if any of these files is symlinked to another one. For example, if ~/.bash_profile is symlinked to /etc/profile then it will produce the effect that you describe.

If that's not it, then we need to look into ALL of these files, and see what's inside.

sureshlohith · 05-07-2009, 11:27 PM

There are no files inside home directory so the commands are not giving any kind of result.

Quote:

Originally Posted by i92guboj

I want to see if any of these files is symlinked to another one. For example, if ~/.bash_profile is symlinked to /etc/profile then it will produce the effect that you describe.

If that's not it, then we need to look into ALL of these files, and see what's inside.

i92guboj · 05-07-2009, 11:40 PM

It should at least output the lines about /etc/profile and /etc/profile.local, those do exist, don't they? What do these two files contain anyway?

sureshlohith · 05-08-2009, 12:32 AM

BY looking into /etc/profile script i identified that /etc/profile.local is called from /etc/profile.

/etc/profile.local has the following lines
export TSLIB_CONFFILE=`/etc/ts.conf`
export TSLIB_PLUGINDIR=`/usr/lib/ts`
export TSLIB_TSDEVICE=`/dev/event0`

Quote:

Originally Posted by i92guboj

It should at least output the lines about /etc/profile and /etc/profile.local, those do exist, don't they? What do these two files contain anyway?

sureshlohith · 05-08-2009, 03:03 AM

BY looking into /etc/profile script i identified that /etc/profile.local is called from /etc/profile.

/etc/profile.local has the following lines
export TSLIB_CONFFILE=`/etc/ts.conf`
export TSLIB_PLUGINDIR=`/usr/lib/ts`
export TSLIB_TSDEVICE=`/dev/event0`

Quote:

Originally Posted by i92guboj

It should at least output the lines about /etc/profile and /etc/profile.local, those do exist, don't they? What do these two files contain anyway?

i92guboj · 05-08-2009, 08:22 AM

Quote:

Originally Posted by sureshlohith

after login u can observe a message displayed "running /etc/profile.local" which is displayed twice and the file /etc/profile.local is called from /etc/profile.

Is this message self contained within /etc/profile? Maybe it's some kind of service in the background which launches the first instance of /etc/profile and then your login shell launches the second one.

sureshlohith · 05-10-2009, 09:54 PM

BUT the message "running /etc/profile.local " is present in the file /etc/profile and i am not able find this in any other file in /etc.

Quote:

Originally Posted by i92guboj

Is this message self contained within /etc/profile? Maybe it's some kind of service in the background which launches the first instance of /etc/profile and then your login shell launches the second one.