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Top Forums Shell Programming and Scripting Running a shell script in cron...email not sending - help?? Post 302217577 by tjhorwood on Wednesday 23rd of July 2008 04:52:34 AM
Old 07-23-2008
Running a shell script in cron...email not sending - help??

I am pretty new to Unix shell scripting, but wondered if anyone could help (in layman's terms if possible!!) Smilie

I have a shell script which ultimately sends an alert to an email address if part of a batch of programs fails. Here's the script that sends the email:

Script: 6check.csh
#!/bin/csh
set alertperson = `cat /export/home/bdodym/alert.person`
if (-f critabend.tag ) then
cat callout6.msg | rmail $alertperson
rm critabend.tag
endif

This is where $alertperson will be forename.surname@address.com designation in the alert.person script

From the command line, all runs fine.

However, if I run through cron, it still seems to be executing the scripts (e.g files are created that I'm asking the script to do generally), but the email is not being sent as I would hope. In the below crontab, 6start.sh has a number of scripts to run through, the last of which is 6check2.csh (as per above)

crontab -l
#!/bin/csh
#############################################
# Minute Hour Month Day Month Weekday Command
# ___________________________________________________________
# 0 01 * * * Job_1
#
51 * * * * /export/home/bdodym/6start.sh

Does anyone know if there is anything additional I need to do add to either the script, or cron, to ensure the email sends? I think (from my VERY limited knowledge of this kind of thing!) that its something to do with the fact cron is running in the background rather than the terminal, as per the command line success. But, this is the final piece of the jigsaw and I just need to ensure I can get it to fit!! Smilie
 

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SCRIPT(1)						    BSD General Commands Manual 						 SCRIPT(1)

NAME
script -- make typescript of terminal session SYNOPSIS
script [-a] [-f] [-q] [-t] [file] DESCRIPTION
Script makes a typescript of everything printed on your terminal. It is useful for students who need a hardcopy record of an interactive session as proof of an assignment, as the typescript file can be printed out later with lpr(1). If the argument file is given, script saves all dialogue in file. If no file name is given, the typescript is saved in the file typescript. Options: -a Append the output to file or typescript, retaining the prior contents. -f Flush output after each write. This is nice for telecooperation: One person does `mkfifo foo; script -f foo' and another can super- vise real-time what is being done using `cat foo'. -q Be quiet. -t Output timeing data to standard error. This data contains two fields, separated by a space. The first field indicates how much time elapsed since the previous output. The second field indicates how many characters were output this time. This information can be used to replay typescripts with realistic typing and output delays. The script ends when the forked shell exits (a control-D to exit the Bourne shell (sh(1)), and exit, logout or control-d (if ignoreeof is not set) for the C-shell, csh(1)). Certain interactive commands, such as vi(1), create garbage in the typescript file. Script works best with commands that do not manipulate the screen, the results are meant to emulate a hardcopy terminal. ENVIRONMENT
The following environment variable is utilized by script: SHELL If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the Bourne shell is assumed. (Most shells set this variable automatically). SEE ALSO
csh(1) (for the history mechanism), replay(1). HISTORY
The script command appeared in 3.0BSD. BUGS
Script places everything in the log file, including linefeeds and backspaces. This is not what the naive user expects. Linux July 30, 2000 Linux
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