if: expression syntax error in gawk


Login or Register for Dates, Times and to Reply

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting if: expression syntax error in gawk
# 1  
if: expression syntax error in gawk

I'm pretty new to shell scripting, but I am catching on quick. I did see one of the stickied threads about the csh, and I think this is relevant, but I don't understand enough to make a decision based on it. So as you'll see below, I use the |csh pipe, and if that is not correct, I'm certainly open to learning how to change it.

I maintain a list of jobs that I've submitted to the server (this is just a file I create and update). I can pull up a list of jobs that are in the queue or running. My goal is to grab the list of running/queued jobs, and compare that to the my list, and output the jobs that are no longer in the queue (meaning they've completed).

My crude attempt is as follows:
Code:
gawk '/jobID:/ {print "qstat -u jmarell | if [ `grep -c " $2 "` -eq 0 ]; echo " $2 }' ~/curJobs.log | csh

So grab the lines from my static file (curJobs.log), and pull the 2nd field which contains the jobID. Then pull up the list of running jobs, and see if that jobID is found with grep. If it is not found, then echo that job ID.

The output then is (2nd line is a jobID, but not the correct one):
Code:
if: Expression Syntax.
348240

This is in fact just the very first job in the list, it is not the correct result.

I have tried so many different iterations of the if statement trying to find the correct format, and I have not succeeded. I've read through the gawk if statement tutorial where they use if ( x % 2 == 0), and such, I've tried to format in similar ways. With and without ` or ", and I am sure I'm missing some fundamental understanding of how I'm to combine these pieces.

Any guidance in solving this problem would be greatly appreciated Smilie
# 2  
The syntax of the generated if statement is not valid in csh.
Code:
qstat -u jmarell | if [ `grep -c 348240` -eq 0 ]; echo 348240

A solution is to generate a statement like that :
Code:
qstat -u jmarell | grep -q 348240 || echo 348240

Another approch to solve your problem :
Code:
qstat -u jmarell |
awk '
    FILENAME=="-" { JobId[$1] = $2; next }
    ! ($2 in JobId) { print "Job id", $2, "not found" }
' - ~/curJobs.log

jean-Pierre.
# 3  
Oh, perfect thank you! I think I understand both of those pretty good.
Login or Register for Dates, Times and to Reply

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #537
Difficulty: Medium
An enumerated data type allows a user to define a list of keywords associated with integers.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Observing error :syntax error in expression

#!/bin/bash a1="04:29:39 - System health check failed" i=$1 echo "a $((a$i))" The script above gives the following error $113> sh tryt.sh 1 tryt.sh: line 6: 04:29:39 - System health check failed: syntax error in expression (error token is ":29:39 - System health check failed") It... (1 Reply)
Discussion started by: ashima jain
1 Replies

2. Shell Programming and Scripting

TCL: syntax error in expression with "*"

I'm using tcl scripts in ns2 ( network simulator) through cygwin. It works fine , however, I downloaded an example when i run it , I got the following syntax error: syntax error in expression with " *2" : unexpected operator * while executing : "expr $bw *2" invoked from within: "$ns... (1 Reply)
Discussion started by: ENG_MOHD
1 Replies

3. Shell Programming and Scripting

Help with awk script (syntax error in regular expression)

I've found this script which seems very promising to solve my issue: To search and replace many different database passwords in many different (.php, .pl, .cgi, etc.) files across my filesystem. The passwords may or may not be contained within quotes, single quotes, etc. #!/bin/bash... (4 Replies)
Discussion started by: spacegoose
4 Replies

4. Shell Programming and Scripting

If expression syntax

Hello there! I am having some difficulties in the syntax of a script. I am a newbie :) What i want is a script that copies 1 or more files to a destination folder with a question if file allready exists if ($#argv > 2) then if (-d $argv($#argv)) then foreach x ($*) cp -i $x to... (4 Replies)
Discussion started by: ennui92
4 Replies

5. UNIX for Dummies Questions & Answers

If Then ElseIf Script - Confusion Around Expression's Syntax

Hello, I am relatively new to UNIX scripting and am learning a lot. I have already tried several searches on this website and have tried various syntax options suggested to no avail. I am obviously not writing the script correctly. I really do appreciate any and all the help. Below is an... (8 Replies)
Discussion started by: dqrgk0
8 Replies

6. Shell Programming and Scripting

if expression syntax error

#! /bin/csh set umr=UMR foreach i ( `ls`) set file_nm=$i set bh_nm=`echo $file_nm | cut -d"_" -f2` if($bh_nm !=$umr) then { set bh_ext=`echo $file_nm | cut -d"_" -f4` set bh_num_nm="$bh_nm $bh_ext a .txt" mv $file_nm $bh_num_nm } ... (1 Reply)
Discussion started by: jdsignature88
1 Replies

7. UNIX for Dummies Questions & Answers

Syntax Help | unix | grep | regular expression | repetition

Hello, This is my first post so, Hello World! Anyways, I'm learning how to use unix and its quickly become apparent that a strong foundation in regular expressions will make things easier. I'm not sure if my syntax is messing things up or my logic is messing things up. ps -e | grep... (4 Replies)
Discussion started by: MykC
4 Replies

8. Shell Programming and Scripting

syntax error for if statment test expression

Hi what's the correct way of writing if 1)if "$time_diff" -gt 5 then echo "killing hung process \n" fi 2)if test $time_diff -gt 5 then echo "killing hung process \n" fi where -time_diff=$(($Sam - $current_min)) and current_min=`date +%M` infact both are giving Syntax... (1 Reply)
Discussion started by: Anteus
1 Replies

9. Shell Programming and Scripting

Expression syntax

Hello, I am getting Expression syntax message and I cannot figure out what's wrong. This program will print all the odd numbers between 0 and the one the user enters, in cshell. I think my logic is either good or almost there, but i dont see the errors. I think it could be the spaces between... (1 Reply)
Discussion started by: morava
1 Replies

10. Shell Programming and Scripting

One more expression syntax error

HI again, still working on the assignment, which is really hard given we just started unix 4 weeks ago. This script should change the permission for the user depending if its x, w or r, to the opposite. When i try to run it, I am getting expression error. Can you spot where the problem is? I really... (3 Replies)
Discussion started by: morava
3 Replies

Featured Tech Videos