The -f flag to 'at' is to specify a list of commands to be run, you're passing your perl script as if it should be executed in shell, line by line.
You want to provide the perl script itself as the command to execute.
[edit] To pass it on the commandline, echo the job into at and leave out the -f flag:
Note that the 'now + 30 minutes' thing doesn't work on my version of at but you still should be ok with this syntax
Hello
say i have written some perl scripts , now i like to call them in my unix shell
as unix command like "more" , "ls" , "grep" so that my say perl script called "foo.pl"
will be called from every where as "foo" or "foo arg1 arg2"?
Thanks (1 Reply)
hi all,
In my perl script, I need to know the command alias name to make my program flexible. I tried many methods like system("alias cmd"), `alias cmd`, use shell qw,etc. But no one could recognize the built in command alias. If I use `which cmd`, it would look for the command based on... (4 Replies)
I am trying to use a script to replace the header of each file, whose filename are stored within the array $test, using the sed command within a Perl script as follows:
$count = 0;
while ( $count < $#test )
{
`sed -e 's/BIOGRF 321/BIOGRF 332/g' ${test} > 0`;
`cat 0 >... (2 Replies)
Hi,
I want to weekly schedule a script execution (using crontab) but only if the system load is low. My question is: If the script does not be executed ( because of high load ) how can I re-schedule the cronjob to run after some minutes? I want the re-scheduling to be executed until the final... (1 Reply)
Hi,
I want to weekly schedule a script execution (using crontab) but only if the system load is low. My question is: If the script does not be executed ( because of high load ) how can I re-schedule the cronjob to run after some minutes? I want the re-scheduling to be executed until the final... (1 Reply)
Hi,
I want to weekly schedule a script execution (using crontab) but only if the system load is low. My question is: If the script does not be executed ( because of high load ) how can I re-schedule the cronjob to run after some minutes? I want the re-scheduling to be executed until the final... (4 Replies)
Hey guys
I am trying to send a perl -e command to a number of systems using SSH. The command should retrieve some information for me. The problem is, the remote shell tries to interpolate my variables and doesn't get it should take the command literally and just execute it.
Below the code.... (2 Replies)
could someone show me a sample command line option driven script?
i want to see an easy way to write one and how i can execute it using command line options such as typing in
read.pl -i <id> -c <cmds> -s <start> -e <end>
would read out all the commands run by ID . from start time to... (7 Replies)
so in unix this command works works and shows me a list of directories
find . -name \*.xls -exec dirname {} \; | sort -u | > list.txt
but when i try running a perl script to run this command
my $query = 'find . -name \*.xls -exec dirname {} \; | sort -u | > list.txt';... (2 Replies)
I wish to know if there is any limitation in using unix commands in perl script or it is just we should avoid using them in our perl script.
For e.g Below is the command to get the recent file in a dir.:
$lcsvFile = `cd "$l_inputfilepath";ls -1t *.CSV|tail -1`
Is there any harm in coding... (1 Reply)
Discussion started by: Devesh5683
1 Replies
LEARN ABOUT OSF1
escape
escape(1) Mail Avenger 0.8.3 escape(1)NAME
escape - escape shell special characters in a string
SYNOPSIS
escape string
DESCRIPTION
escape prepends a "" character to all shell special characters in string, making it safe to compose a shell command with the result.
EXAMPLES
The following is a contrived example showing how one can unintentionally end up executing the contents of a string:
$ var='; echo gotcha!'
$ eval echo hi $var
hi
gotcha!
$
Using escape, one can avoid executing the contents of $var:
$ eval echo hi `escape "$var"`
hi ; echo gotcha!
$
A less contrived example is passing arguments to Mail Avenger bodytest commands containing possibly unsafe environment variables. For
example, you might write a hypothetical reject_bcc script to reject mail not explicitly addressed to the recipient:
#!/bin/sh
formail -x to -x cc -x resent-to -x resent-cc
| fgrep "$1" > /dev/null
&& exit 0
echo "<$1>.. address does not accept blind carbon copies"
exit 100
To invoke this script, passing it the recipient address as an argument, you would need to put the following in your Mail Avenger rcpt
script:
bodytest reject_bcc `escape "$RECIPIENT"`
SEE ALSO avenger(1),
The Mail Avenger home page: <http://www.mailavenger.org/>.
BUGS
escape is designed for the Bourne shell, which is what Mail Avenger scripts use. escape might or might not work with other shells.
AUTHOR
David Mazieres
Mail Avenger 0.8.3 2012-04-05 escape(1)