Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: PERL Syntax Errors
Top Forums Shell Programming and Scripting PERL Syntax Errors Post 302429849 by durden_tyler on Tuesday 15th of June 2010 07:18:38 PM
Old 06-15-2010
Quote:
Originally Posted by nurani
...
I am a newbie to PERL and working on a script....
The actual command in the program (which is within a case structure) is given below

# This gives the actual count of inquires from a log file (It works fine when I type this on the command line)
# $output is the actual log file name

inq1) grep 'Number of inquiries :' $output | sort -u | awk '{print $5}' > inq1-CTR;
That looks like shell script syntax. It won't work in a Perl program.
The fact that it worked fine on the command line should've given you a clue. If a command or a pipeline works on the shell prompt, then it most probably won't work verbatim in Perl.

The shell is not Perl. And Perl is not the shell.

Quote:
...
The following error message appears multiple times

Scalar found where operator expected at ./inquires_rpt line 104, near ""Number of inquires:" $output"
(Missing operator before $output?)
String found where operator expected at ./inquiries_rpt line 104, near "awk '{print $5}'"
(Do you need to predeclare awk?)
...
These are pretty self-explanatory error messages.

"Number of inquiries:" is a literal string. $output is a scalar. Perl expects you to perform some operation on them, hence it complains about a missing operator.

Again, the Perl program doesn't understand "awk" - since it's not a scalar/array/hash etc. (as evidenced by the lack of sigils), the Perl interpreter thinks that it is probably a subroutine or a global variable name that needs to be predeclared.

Quote:
...
Please let me know what I need to do to fix this. I am also searching on the net for a solution.

Since I have no background in this, I don't have my debugging skills built up yet to scout for the hot spots.
...
You'd usually want to try the Perl debugger after you have some familiarity and success with the syntax of Perl, which means you ought to begin with the basics of Perl.
Dumping shell commands in a file and feeding it to the Perl interpreter is like dumping sentences from a German book and passing it off as an English essay.

As for fixing this - if you can explain what you are trying to accomplish, then maybe we could suggest something.

tyler_durden
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

AWK Syntax errors :/

I recently started as an intern and my manager wanted to see how well I would handle Korn Bourne shell scripting without any prior experience, I have prior programming experience but I keep running into syntax errors with AWK. Please take a look at my simple code and tell me what stupid mistake... (6 Replies)
Discussion started by: yongho
6 Replies

2. Shell Programming and Scripting

perl version for syntax errors

All, Does it matter what perl verios your running when you get syntax errors? on version 5.6.1 the code works fine, but on 5.8.0 the code gets errors? #!/usr/bin/perl #use strict; #use warnings; my $mess = 'messages'; my $mess1 = 'messages.1'; my $mess2 = 'messages.2'; my... (13 Replies)
Discussion started by: bigben1220
13 Replies

3. UNIX for Dummies Questions & Answers

I dont really think that the math header has syntax errors

Hi, Mini:Evaluator develop$ make bison -d grammar.y grammar.y: conflicts: 24 shift/reduce flex rules.l cc -0 -o Evaluator grammar.tab.c lex.yy.c -ly -ll -lm In file included from grammar.y:3: /usr/include/architecture/i386/math.h:310: error: syntax error before numeric constant... (1 Reply)
Discussion started by: tcerka
1 Replies

4. Shell Programming and Scripting

Perl: Backtick Errors

When trying to use backticks for system commands, is there a way to read the error messages if a command doesn't execute properly? I have no problem getting the results if the command is properly executed. Ex. my @result = `dir`; foreach my $line (@result) { print "Result = $line";... (2 Replies)
Discussion started by: kooshi
2 Replies

5. Shell Programming and Scripting

line count with if /else - syntax errors

this is the script: ps -ef|grep "x_jobstat 10 v001" > jobstatv001.txt ps -ef |grep "x_jobserver 10 v001" >> jobstatv001.txt #Sample text - each line preceded by 4 spaces # root 133064 102986 0 08:49:28 pts/6 0:00 grep x_jobstat 10 v001 # root 137550 1 0 Nov 08 - 0:28... (6 Replies)
Discussion started by: kwalkner
6 Replies

6. Shell Programming and Scripting

logging errors using perl

Hi, Can some one please tell me how to redirect only errors to the log file using perl. Thanks, Anjan. ---------- Post updated at 08:41 PM ---------- Previous update was at 08:39 PM ---------- Also, i dont want to use any module. Please tell me in normal way (1 Reply)
Discussion started by: Anjan1
1 Replies

7. Emergency UNIX and Linux Support

Seek help on shell script syntax errors

I want to delete archivelog files that has been archived and applied from primary database to standby database. This piece of script is working in Linux server. However, I copy it to Unix server with tiny modification. It won't work and generate the error message. I have checked code carefullt... (8 Replies)
Discussion started by: duke0001
8 Replies

8. Shell Programming and Scripting

Converting from Linux bash (GNU) to Solaris script syntax errors

Original script written on CentOS 6.3 with GNU bash 4.1.2 Destination system is Solaris 9 with GNU bash 2.05 (not changeable by me) I have a script written on the linux side but now we need to provide a version to another site that "doesn't like linux". I've been going through changing the ] or... (13 Replies)
Discussion started by: oly_r
13 Replies

9. Homework & Coursework Questions

Help with shell scrip syntax errors

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: This script will analyse the channels.txt e registrations.txt and it will allow to mage the channels and the... (9 Replies)
Discussion started by: Demas
9 Replies

10. Shell Programming and Scripting

Finding latest file in dir but getting syntax errors

I believe there are couple of syntax issues in my script, couldn't find them :( can someone help me with fixing it to make it work. cd /abcde/ #get the latest filename excluding subdirs filename=`ls -ltr | grep ^- | tail -1 | awk '{print $8}'` #get system date and file timestamp and... (3 Replies)
Discussion started by: simpltyansh
3 Replies

LEARN ABOUT LINUX

service

service(8)						      System Manager's Manual							service(8)

NAME

       service - run a System V init script

SYNOPSIS

       service SCRIPT COMMAND [OPTIONS]

       service --status-all

       service --help | -h | --version

DESCRIPTION

       service runs a System V init script in as predictable environment as possible, removing most environment variables and with current working
       directory set to /.

       The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT.  The  supported  values  of  COMMAND  depend  on  the
       invoked	script,  service  passes  COMMAND and OPTIONS it to the init script unmodified.  All scripts should support at least the start and
       stop commands.  As a special case, if COMMAND is --full-restart, the script is run twice, first with the stop command, then with the  start
       command.

       service --status-all runs all init scripts, in alphabetical order, with the status command.

EXIT CODES

       service calls the init script and returns the status returned by it.

FILES

       /etc/init.d
	      The directory containing System V init scripts.

ENVIRONMENT

       LANG, TERM
	      The only environment variables passed to the init scripts.

SEE ALSO

       /etc/init.d/skeleton,
       update-rc.d(8),
       init(8),
       invoke-rc.d(8).

								     Jan 2006								service(8)
All times are GMT -4. The time now is 09:32 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy