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Top Forums Shell Programming and Scripting Running script in crontab in a specific directory Post 302933116 by DGPickett on Tuesday 27th of January 2015 04:32:37 PM
Old 01-27-2015
A good cron script always starts by running .profile, or some such environment file, to get the same behaviors you had interactively. Writing a .profile that is no-terminal friendly is a bit complex. You need to move all the terminal stuff to the end and test something like 'tty' to see if there is a terminal. Similarly, care needs to be taken if profile is to support both sh and ksh or bash, as sh has fewer tools and different options. e.g., no $(...) or 'set -o vi'. You might write a .profile_cron or the like and source it ( . script_path ) from .profile, so the terminal stuff can be left in .profile but all other stuff is in .profile_cron. Ditto for sh versus ksh/bash: .kshrc and .bash_profile

A few things remain different, like 'ps' options that reflect your terminal, for in cron you have no controlling terminal.

A good script, generally, has execute permissions and starts with a valid #! line as described in man execvp. Without that, it usually goes to sh as stdin.
 

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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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