Solved

syntax help on ksh if

Posted on 2009-04-10
8
266 Views
Last Modified: 2013-12-26
For some reasons, my if test is not working, even though I could echo the right flag value.

Anyway, the cp line always got executed no matter if the variable MOVE_FILE returns Y or N.

What is wrong?

Thanks!
MOVE_FILE=grep...
if [ "${MOVE_FILE}"  = 'Y' ];
then
echo "flag: ${MOVE_FILE}"
cp....
fi

Open in new window

0
Comment
Question by:ommer
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 4
8 Comments
 
LVL 40

Expert Comment

by:omarfarid
ID: 24116235
first you don't need the ; after the if line
2nd use == rather = since I think some versions use it as the assign operator
0
 

Author Comment

by:ommer
ID: 24116347
I have tried those two variations, as well as Y, 'Y', and "Y". But it's still not working.
0
 
LVL 40

Accepted Solution

by:
omarfarid earned 125 total points
ID: 24116370
how the value is assigned to the variable? Can you share the code so I can look at it?
0
Optimize your web performance

What's in the eBook?
- Full list of reasons for poor performance
- Ultimate measures to speed things up
- Primary web monitoring types
- KPIs you should be monitoring in order to increase your ROI

 
LVL 40

Expert Comment

by:omarfarid
ID: 24116419
here an example :

$ cat 1.ksh
#!/usr/bin/ksh
ans=Y
if [ $ans == "Y" ]
then
    echo yes
fi
ans=N
if [ $ans == "Y" ]
then
    echo yes
else
    echo no
fi
$ ./1.ksh
yes
no
0
 

Author Comment

by:ommer
ID: 24116507
MOVE_FILE=""`grep '^eMvfl>' $LOG_FILE | head -n 1 | cut -d'>' -f2 | cut -d'<' -f1`

thanks!
0
 
LVL 40

Expert Comment

by:omarfarid
ID: 24116599
can you show the out put of

grep '^eMvfl>' $LOG_FILE | head -n 1 | cut -d'>' -f2 | cut -d'<' -f1

Also, why do you have "" before `grep '^eMvfl>' $LOG_FILE | head -n 1 | cut -d'>' -f2 | cut -d'<' -f1`
0
 

Author Comment

by:ommer
ID: 24116863
The output as it echo:
flag: Y

But I just found out when I gave N as input, the log file did not get to the echo line. Huh...

Also, the "" before grep is from my co-worker. I am still learning, and have no idea why they are in. And I will try to go wihtout them in a minute.
0
 

Author Closing Comment

by:ommer
ID: 31568923
It turned out that error was from the grep line.
0

Featured Post

Get 15 Days FREE Full-Featured Trial

Benefit from a mission critical IT monitoring with Monitis Premium or get it FREE for your entry level monitoring needs.
-Over 200,000 users
-More than 300,000 websites monitored
-Used in 197 countries
-Recommended by 98% of users

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

When you do backups in the Solaris Operating System, the file system must be inactive. Otherwise, the output may be inconsistent. A file system is inactive when it's unmounted or it's write-locked by the operating system. Although the fssnap utility…
FreeBSD on EC2 FreeBSD (https://www.freebsd.org) is a robust Unix-like operating system that has been around for many years. FreeBSD is available on Amazon EC2 through Amazon Machine Images (AMIs) provided by FreeBSD developer and security office…
Learn how to navigate the file tree with the shell. Use pwd to print the current working directory: Use ls to list a directory's contents: Use cd to change to a new directory: Use wildcards instead of typing out long directory names: Use ../ to move…
In a previous video, we went over how to export a DynamoDB table into Amazon S3.  In this video, we show how to load the export from S3 into a DynamoDB table.
Suggested Courses

635 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question