Need help in Shell scripting


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Need help in Shell scripting
# 1  
Old 04-13-2011
Need help in Shell scripting

Code:
file_dt=`head -1 nnnn_mi_claim_ext.dat | cut -c5-12`
file_val_dt=`cat cat dateval.txt`
 

if [ $file_dt -le  $file_val_dt ]
then
 exit 2
else
 echo $str1 > dateval.txt
 recnt1=`grep "^D" $1 |wc -l`
 filerecnt=`tail -1 $1 |cut -d '~' -f3`
 recnt=`printf "%09d" $recnt1`
 if [ $recnt1 -eq $filerecnt ]
 then
  exit 0
 else
  exit 1
 fi
fi

I have written this script to validate headers in the file. In "if" condition the variables $file_dt and $file_val_dt taking it as string i am not able to compare the dates. Does unix has a function to convert string to integer??
Please help me...

Regards
Akshu

Last edited by pludi; 04-13-2011 at 09:17 AM..
# 2  
Old 04-13-2011
in Korn shell (#!/bin/ksh) , you can use if condition with the operators

-otolder than
-ntnewer than
on files

Example :

Code:
# touch titi
# touch toto
# stat titi
  File: `titi'
  Size: 0               Blocks: 0          IO Block: 8192   regular empty file
Device: 154003dh/22282301d      Inode: 6517        Links: 1
Access: (0644/-rw-r--r--)  Uid: ( 1000/   admin)   Gid: ( 1000/   admin)
Access: 2011-04-13 14:21:41.654862000 +0200
Modify: 2011-04-13 14:21:41.654862000 +0200
Change: 2011-04-13 14:21:41.654868000 +0200
# stat toto
  File: `toto'
  Size: 0               Blocks: 0          IO Block: 8192   regular empty file
Device: 154003dh/22282301d      Inode: 6520        Links: 1
Access: (0644/-rw-r--r--)  Uid: ( 1000/   admin)   Gid: ( 1000/   admin)
Access: 2011-04-13 14:21:48.006375000 +0200
Modify: 2011-04-13 14:21:48.006375000 +0200
Change: 2011-04-13 14:21:48.006381000 +0200
# [[ titi -nt toto ]] && echo "titi is newer than toto" || echo "toto is newer than titi"
toto is newer than titi
# touch titi
# [[ titi -nt toto ]] && echo "titi is newer than toto" || echo "toto is newer than titi"
titi is newer than toto
#


Last edited by ctsgnb; 04-13-2011 at 09:25 AM..
This User Gave Thanks to ctsgnb For This Post:
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Shell script to read lines in a text file and filter user data Shell Programming and Scripting

sxsaaas (3 Replies)
Discussion started by: VikrantD
3 Replies

2. Shell Programming and Scripting

help me in Shell Scripting

Hi there please have a look at the code..i want to create Using a named pipe. Run a find in the background starting in the working directory While this is happening wait for input from the user to ask him which file to find. If the user does not enter any data in 10 seconds ask the user again.... (1 Reply)
Discussion started by: kattak1511
1 Replies

3. Shell Programming and Scripting

Shell scripting

Hi, if in a network there are lots of PCs connected with either windows or linux as operating system.Then what will be the shell script for the same and also if the PC has linux in it then we have to find if it is occupied or unoccupied. If the PC has windows in it then we have to find if it is... (6 Replies)
Discussion started by: akansha singh
6 Replies

4. UNIX for Dummies Questions & Answers

Shell Scripting

Hey I have a data in the file named as outputFile.txt. The data is in the format 123456,12345678912345,400,09/09/09,INACTIVE. I want this output without commas ie 12345612345678912345400090909INACTIVE. Please tell me what to do and clear explain all the terms, as I am new to it. (6 Replies)
Discussion started by: sampandey31
6 Replies

5. Web Development

Perl scripting or shell scripting?

i am going to study any one of the scripting languages mentioned above(shell 0r perl scripting) . Which is having more scope for a fresher? (1 Reply)
Discussion started by: Anna Hussie
1 Replies

6. What is on Your Mind?

Shell Scripting vs Perl scripting

Gents, I have been working in a Solaris/Unix environment for about 9 months. I took some linux classses online before getting the job. But, I am not very good at scripting. I want to learn how to script. Do you think that I should start with Shell scripting or Perl? I wanted to continue with... (2 Replies)
Discussion started by: Pouchie1
2 Replies

7. Android

Android Scripting Environment: Shell Scripting and Android

I just upgraded to Android 2.2 from 2.1. The GPS issue that was troublesome in 2.1 seems to have been fixed. Some of web browsing seems faster, but it could just be my connection is better today ;) Flash works in some browsers but not very good and it is too slow for Flash apps designed for... (0 Replies)
Discussion started by: Neo
0 Replies

8. What is on Your Mind?

Shell scripting vs Perl scripting

Hi all, I would like to start developping some good scripting skills. Do you think it would be best to start with shell scripting or Perl? I already got a fundation, really basics, in perl. but I am wondering what would be best to be good at first. Can you please help me determine which one to... (14 Replies)
Discussion started by: Pouchie1
14 Replies

9. Shell Programming and Scripting

Call Shell scripting from Perl Scripting.

Hi How to call a shell scripting through a Perl scripting? Actually I need some value from Shell scripting and passes in the Perl scripting. So how can i do this? (2 Replies)
Discussion started by: anupdas
2 Replies

10. Shell Programming and Scripting

difference between AIX shell scripting and Unix shell scripting.

please give the difference between AIX shell scripting and Unix shell scripting. (2 Replies)
Discussion started by: haroonec
2 Replies
Login or Register to Ask a Question