Re: What is the correct way to set up login environment in crontab?
On Tue, Nov 08, 2011 at 09:46:37PM -0600, Peng Yu wrote: > I need to use cron to run some job. I know that cron only set up very > basic environment. I'd like to duplicate my login environment. Just source /etc/profile and your ~/.bash_profile or ~/.profile (or whatever) from the script that your cron job executes. Personally I would advise against this. Login environments are for interactive logins, not cron jobs.
Re: What is the correct way to set up login environment in crontab?
On Wed, Nov 9, 2011 at 7:45 AM, Greg Wooledge wrote: > On Tue, Nov 08, 2011 at 09:46:37PM -0600, Peng Yu wrote: >> I need to use cron to run some job. I know that cron only set up very >> basic environment. I'd like to duplicate my login environment. > > Just source /etc/profile and your ~/.bash_profile or ~/.profile (or > whatever) from the script that your cron job executes. > > Personally I would advise against this. Login environments are for > interactive logins, not cron jobs. So neither -i nor -l is necessary? -- Regards, Peng
Re: What is the correct way to set up login environment in crontab?
On Wed, Nov 9, 2011 at 7:45 AM, Greg Wooledge wrote: > On Tue, Nov 08, 2011 at 09:46:37PM -0600, Peng Yu wrote: >> I need to use cron to run some job. I know that cron only set up very >> basic environment. I'd like to duplicate my login environment. > > Just source /etc/profile and your ~/.bash_profile or ~/.profile (or > whatever) from the script that your cron job executes. > > Personally I would advise against this. Login environments are for > interactive logins, not cron jobs. I sourced my ~/.bashrc, which source some other files. It seems the environment variables defined in these files are not seen with env. Why is so? -- Regards, Peng
Re: What is the correct way to set up login environment in crontab?
On Wed, Nov 09, 2011 at 10:29:52AM -0600, Peng Yu wrote: > I sourced my ~/.bashrc, which source some other files. It seems the > environment variables defined in these files are not seen with env. > Why is so? Without seeing the code? Impossible to say. But you're doing it backwards. ~/.bashrc should be sourced FROM ~/.bash_profile. A login shell reads ~/.bash_profile only, so it's the responsibility of ~/.bash_profile to read ~/.bashrc to set up aliases, functions, shopts, and other ephemeral shell settings that can't be inherited from the environment. http://mywiki.wooledge.org/DotFiles
Re: What is the correct way to set up login environment in crontab?
On Wed, Nov 9, 2011 at 10:41 AM, Greg Wooledge wrote: > On Wed, Nov 09, 2011 at 10:29:52AM -0600, Peng Yu wrote: >> I sourced my ~/.bashrc, which source some other files. It seems the >> environment variables defined in these files are not seen with env. >> Why is so? > > Without seeing the code? Impossible to say. But you're doing it backwards. > ~/.bashrc should be sourced FROM ~/.bash_profile. A login shell reads > ~/.bash_profile only, so it's the responsibility of ~/.bash_profile to > read ~/.bashrc to set up aliases, functions, shopts, and other ephemeral > shell settings that can't be inherited from the environment. Sorry for the confusion. ~/.bash_profile is not the problem here. I have the following line in /path/programtorun.sh . ~/.bashrc In ~/.bashrc, I have ". ~/bash_some". In ~/.bash_some, I have some variable assignment VAR=blah. However, VAR is not seen in env in /path/programtorun.sh (called from cron). -- Regards, Peng
Re: What is the correct way to set up login environment in crontab?
On 11/09/2011 10:14 AM, Peng Yu wrote: variable assignment VAR=blah. That sets up a bash-local variable. If you want it to be exported to the environment visible to child processes, then you _also_ need to use export, as in either: VAR=blah export VAR or export VAR=blah However, VAR is not seen in env in /path/programtorun.sh (called from cron). Right - bash maintains two sets of variables, and only the exported ones are visible to children. -- Eric Blake ebl...@redhat.com+1-801-349-2682 Libvirt virtualization library http://libvirt.org
