I don't understand the egrep $pid on the end, is the PID of the tail_file.pl process in that environment variable? If so is this set before the perl script runs or within the perl script?
What are you trying to achieve, I'd assume you are trying to check that process $pid is still running?
Your problem is using a complicated pipeline - with awk of all things - in a perl script.
Whenever I see a pipeline with
Code:
awk '{print $2}'
in it my first reaction is always: Is there a better way? There invariably is. When ps is in that pipeline there is always a better way using pgrep and ps -o
Given you presumably are looking for $pid why not:
Hi,
I have a shell script, In which i have variable "var1" and some perl command inside shell script.
export var1='coep -n rst-a2p-hinje.vci.all.com -c'
perl -pi -e 's/^/coep -n rst-a2p-hinje.vci.all.com -c /' command.txt
currently I am adding value of var1 in command.txt file by... (2 Replies)
Hi,
I would like to use a shell variable $amp in my perl command line.
for fa in $WORKSPACE/*.fa; do
amp=`grep ">.*" $fa | sed -e's#>\(.*\)#\1#g'`
ampsam="$WORKSPACE/$base/$base.$amp.sam"
sqheader=`grep "^@SQ.*SN:$amp.*" $sam`
printf "$sqheader\n" >> $ampsam
... (3 Replies)
perl script i am using for search and replace is not working as expected...
I am using it for in-place search/replace.
I am new to perl, can someone please help me solving the issue here.
########SCRIPT
#!/bin/sh
var="abc"
var2="def"
perl -pi -e 's/${var}/def/g' testfile
exit 0
... (0 Replies)
Hi Guys,
I wish to execute some shell commands through PERL.
Here is what I desire to do
1) I wish to find list of directories in current working location
2) Then go in each directory and execute few commands like
a) rm -rf *.log (Shell command)
b) coreBuilder -f cb_tests.tcl (Some... (6 Replies)
Hi All,
I am using the following command to invoke the shell script from a perl command.
perl -i.bak -pe'BEGIN { $cmd = "/opt/coreservices/tomcat-5.5.9/bin/digest.sh -a sha"; }
s/(password=")(*)/
$1.`$cmd $2|cut -d: -f2|tr -d "\n"`
/e
' $CATALINA_HOME/conf/tomcat-users.xml
I need... (1 Reply)
Hello friends ,
I need a help how to call the variable which has define in the shell script in the perl command line.
example of the shell scrip :
str="hell0"
i want print the value of this variable in the perl command line.
perl -e 'print $str'
but this is not working .
can... (2 Replies)
02-16-2011
