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Full Discussion: Setting environment variables in Cron file
Top Forums Shell Programming and Scripting Setting environment variables in Cron file Post 302539685 by kshji on Monday 18th of July 2011 11:23:00 AM
Old 07-18-2011
No differences, but when you use cron, your env is not same as if you log in. Depends which *nix system you have.

In then cron env the best default idea is to set env.

Easy to test. Make next envtst.sh script and run it and then run it using cron. Locate it ex. dir /tmp.
Code:
cat <<EOF > /tmp/envtst.sh
#!/usr/bin/sh
env > /tmp/envtst.sh.tmp
EOF
chmod a+rx /tmp/envtst.sh

And then run crontab -e to edit cronfile and add next line
Code:
* * * * *  /tmp/envtst.sh  >> /tmp/envtst.sh.log 2>&1

Wait about minute and look file /tmp/envtst.sh.tmp

That is your env when you use cron. It's not same as login. PATH is something, not enough usually and so on. Usually HOME is.

One method is to execute your .profile

Example cron, if your /tmp/envtst.sh.tmp include HOME or hardcode path
Code:
* * * * * cd $HOME; ./myjob.sh >> /tmp/job1.log 2>&1
# * * * * * cd /somedir; ./myjob.sh >> /tmp/job1.log 2>&1

And myjob.sh is something:
Code:
#!/usr/bin/someshell   # sh, ksh, bash, ...

# do setup file = set environmnet
. ./my.setup
# or ex.
. ./.profile

cd $HOME
dosome job ...

my.setup
Code:
# add PATH, but not wait so much
PATH=$PATH:/bin:/usr/bin:/usr/local/bin:/some/other/bin
# or set  it - overwrite
PATH=/bin:/usr/bin:/usr/local/bin:/some/other/bin
DBNAME=somedb
LOGDIR=/some/other/loc/log
# variables are global
export PATH DBNAME LOGDIR

Ofcource you can create your script always using this idea - not trust env, set it.
Last edited by kshji; 07-18-2011 at 12:41 PM..
 

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LEARN ABOUT OPENSOLARIS

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 5.11							    20 Dec 1992 							profile(4)
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