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Full Discussion: Issue with variables via cronned script
Top Forums UNIX for Dummies Questions & Answers Issue with variables via cronned script Post 302464468 by methyl on Wednesday 20th of October 2010 08:38:47 AM
Old 10-20-2010
Firstly let's find out what environment you have in cron:
Try a one off cron containing just an "env" command and post the output.
I still think that the shell invoked by your cron does not understand $( ) notation.

Another way. Try an "at" job to find out what Shell cron uses:
Code:
at now
echo "" >/dev/null
<ctrl/d>
warning: commands will be executed using /usr/bin/sh

As others have hinted, another potential problem here is the "tty" command.
The "tty" command requires a real physical terminal and will not work from cron. The error message is "not a tty". In your case I think it hit a syntax error (in whatever Shell your cron uses) before trying the "tty" command.

The method you are using to generate history log file names needs a rethink if you want to run from cron OR you just do not execute those lines when running from cron by testing whether stdout is a terminal.

e.g.
Code:
if [ ! -t 1 ]
then

ttyname=$(/usr/bin/tty)
today=$(/bin/date +'%Y%m%d')
HISTDIR=$HOME/.sys/hists
HISTFILE=$HOME/.sys/hists/$today.${ttyname##*/}
HISTSIZE=500

if [ ! -d "$HISTDIR" ]
then
mkdir -p 700 -m $HISTDIR
fi

fi

Personally I would make a separate script containing a suitable shebang line and only those lines which I need when running from cron and check that it is more than is in the sytem's own "oraenv".



Attendum:
Don't forget that HISTFILE needs a terminal. It will not do anything from a cron job.
About the name of $HISTFILE. Your method will not stop sessions from different users getting appended because the "tty" name is reused when someone logs out. You need to include a bit more to make the filename unique within one calendar day e.g. the login username and current process id ($$) .
Last edited by methyl; 10-20-2010 at 09:51 AM..
 

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LEARN ABOUT MINIX

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)
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