Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

Execution problem with shell script

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Execution problem with shell script
# 1  
Old 10-15-2010
Execution problem with shell script
Hi all,
I want to use perl string manipulation commands in my shell script.
I have written following script.

Code:
 
echo "enter name"
read name
perl -e '$m=length($name);
echo $m

it gives an error: unrecognized token in perl command line.
do not suggest me an equivalent command of shell script.
just tell me what should i do to embed perl command in shell script?
thanks
Last edited by vbe; 10-15-2010 at 10:01 AM.. Reason: Code tags please
# 2  
Old 10-15-2010
Unnecessary to use an external program, use the shell built-in:
Code:
echo ${#name}

# 3  
Old 10-15-2010
More generally, count any number of bytes from any source with "wc -c" (but for this it would count the line feed, too, so I echo without linefeed):

echo "$name\c" | wc -c | read name_len
# 4  
Old 10-16-2010
Quote:
Originally Posted by DGPickett
More generally, count any number of bytes from any source with "wc -c" (but for this it would count the line feed, too, so I echo without linefeed):

echo "$name\c" | wc -c | read name_len

That will not work for most people:
Code:
$ name=chris
$ echo "$name" | wc -c
6
$ echo "$name\c" | wc -c
8

Also, for most people, name_len will not contain the result you want. In most shells, all elements of a pipeline are executed in a subshell.
Use command substitution instead:
Code:
name_len=$( printf "%s" "$name" | wc -c )

Or better, as others have already pointed out, use the shell's own length expansion:
Code:
echo "${#name}"

This User Gave Thanks to cfajohnson For This Post:
ctsgnb
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Execution problem with shell script for modifying a user

#/bin/sh echo "enter the user name" read $username echo "Enter new home directory" read $newhd usermod -d $newhd $username ;; error while executing : enter the user name Rev Enter new home directory: /home/58745 usermod: option requires an argument -- 'd' Try `usermod --help' or... (2 Replies)
Discussion started by: Revanth547
2 Replies

2. Solaris

Script on Solaris spawning 2 processes for one shell script execution

Hi, I am having a shell script on Solaris 10 which has a while loop as shown below. #!/usr/bin/ksh # while do sleep 60 done Name of the shell script is coldcentric.sh. I executed script /DATAWAREHOUSE/LOAD/Scripts/coldcentric.sh from a command task in Informatica worklow as... (3 Replies)
Discussion started by: chekusi
3 Replies

3. Solaris

Execution problem in shell script while insert into DB

Hi, am facing some problem while inserting a record into a script Please find script below. `sqlplus -s asdf/asdf123 <<eof! set feedback off; set heading off; set verify off; insert into... (2 Replies)
Discussion started by: senkerth
2 Replies

4. IP Networking

Problem with script execution from a DHCP event

Hi, I'm installing a DHCPD Server with the packages from a distro SLES11 SP1 (dhcp-server-3.1.1-7.12). And a DNS Server with PowerDNS: pdns-recursor-3.3-1 pdns-static-3.0-1 The DHCP update de DNS Server, but PowerDNS is not RFC 2135 compliant, and I have to update the MySQL register... (5 Replies)
Discussion started by: bypper
5 Replies

5. Shell Programming and Scripting

Execution problem with csh script

Hi All, I have a small issue with my csh script which I am using to FTP a file. What I know is...there are two commands to execute script.. 'sh <file>' & '\<file>'. When I execute my script with command 'sh <file>', it gives me syntax error while it runs successfully with command '\<file>'. I am... (3 Replies)
Discussion started by: ndd
3 Replies

6. Shell Programming and Scripting

Execution problem with grep script (2 variables)

#!\bin\sh TEST=test.log GREP=\usr\bin\grep $GREP -i 'dog\|cat' ${TEST} Why doesn't grep run at all? (10 Replies)
Discussion started by: jazzaddict
10 Replies

7. Shell Programming and Scripting

parallel execution of script/ synchro problem

Hi everybody, In a csh script, i need to run 4 time the same prog with different parameters. What i want is to run them in parallel. for this i use the command toto1.sh & toto2.sh & toto3.sh & toto4.sh For this I have no problem. In fact, I need to wait until all the programs are over to... (2 Replies)
Discussion started by: Moumou
2 Replies

8. Shell Programming and Scripting

problem with remote execution of script using telnet

Hi all, i am trying to remotely execute a script from a different server. this is the code that i use : #!bin/sh pwd (sleep 1 echo "username" sleep 2 echo "pwd" sleep 2 echo "cd /path/to/file" if then echo "script1.sh" echo "mailx -s "Task Executed"... (1 Reply)
Discussion started by: sais
1 Replies

9. Shell Programming and Scripting

problem with shell script execution

Hi All, i am running a shell script in which there is a command `ps -ef | grep smon > db` When i execute this command in the command prompt i am getting the desired output..but when the script is executed..the db file is getting created but with no values...I could not find the reason for... (2 Replies)
Discussion started by: anju
2 Replies

10. Shell Programming and Scripting

execution of shell script

How can I execute another shell script from one? Malay (5 Replies)
Discussion started by: malaymaru
5 Replies
Login or Register to Ask a Question