Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

check if files exists

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting check if files exists
# 1  
Old 09-21-2011
check if files exists
i writing a program that checks if any .txt files exist in the current directory if it does, then it lists the files...

i have got everything right, except the validation part doesnt work!

....
if [ -e .txt ]
then
ls *.txt
else
echo "file not found"

everytime it tells me file not found!!
by the way, it is bourne shell!!

thanks
# 2  
Old 09-21-2011
Code:
 
bash-3.00$ ls *.abc > /dev/null 2>&1 && (echo ".txt files are there";ls *.txt) || echo "No files"                                                           
No files
bash-3.00$ ls *.txt > /dev/null 2>&1 && (echo ".txt files are there";ls *.txt) || echo "No files"                                                           
.txt files are there
new.txt      old.txt

# 3  
Old 09-21-2011
Quote:
Originally Posted by itkamaraj
Code:
 
bash-3.00$ ls *.abc > /dev/null 2>&1 && (echo ".txt files are there";ls *.txt) || echo "No files"                                                           
No files
bash-3.00$ ls *.txt > /dev/null 2>&1 && (echo ".txt files are there";ls *.txt) || echo "No files"                                                           
.txt files are there
new.txt      old.txt

thanks, but is it bourne shell? i am only new to shell scripting!!! please explain!!

thanks
# 4  
Old 09-21-2011
Code:
 
ls *.abc > /dev/null 2>&1  ##redirect the output and error message to /dev/null
 
&& (echo ".txt files are there";ls *.txt) ##this block only executes when the first command (ls) executed successfully (exit code:0)
 
|| echo "No files"  ## will execute if the ls command is not successful ( means, exit code is not zero)

Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Check if file exists

I need to check whether a file exists and has been changed. The file should contain a specific string. The file should also have been changed within the last ten seconds. How do I do that? (3 Replies)
Discussion started by: locoroco
3 Replies

2. Shell Programming and Scripting

How to check more than 1 file specified files exists?

Hi all, One of my script crated created 2 files in a dirs Output.log and Output.tmp. Now in another script i need to check if both of the above mentioned files are present in a directory or not. I know to check one file but need to check both the files. Anyone could please tell me how... (3 Replies)
Discussion started by: girijajoshi
3 Replies

3. Shell Programming and Scripting

Check if PID exists

In a Shell Script what is the most generic way to find in the PID exists or not. If it does not exist how can I echo the user "PID does not exist" & terminate the unix script ? If the command can work on most flavors of operating system the more useful I will find it to be. Current system... (16 Replies)
Discussion started by: mohtashims
16 Replies

4. Shell Programming and Scripting

File exists, but cannot be opened.How to check- whether it could be opened to read when it exists

Hi #Testing for file existence if ; then echo 'SCHOOL data is available for processing' else echo 'SCHOOL DATA IS NOT AVAILABLE FOR PROCESSING' : i wrote a script, where it begins by checking if file exists or not. If it exists, it truncates the database... (2 Replies)
Discussion started by: rxg
2 Replies

5. UNIX for Dummies Questions & Answers

check if two files exists at the same time in one location

Hi friends, I am trying to check if the two files i am expecting are created in a specific location. if both files does not exist, do an echo if -a ]; then echo "files not found" fi It gives me the following message: bash: Please help! :) (3 Replies)
Discussion started by: kokoro
3 Replies

6. Shell Programming and Scripting

how to check to see if a file exists?

I want to write a script to see if various files exist. What I want to do is have the script search in various directories if a file exist, and if not, then output something like "/path/file does not exist". I don't actually know of how to check and see if a file exists or not. What I have in mind... (2 Replies)
Discussion started by: astropi
2 Replies

7. Shell Programming and Scripting

Copy Files to Dir and Check If File Exists

Hi everyone. I am trying to write a bash script that will copy files from one directory to another but I need to be able to check the directory that I'm copying the files to and see if the file already exists. If it does I need to add a number at the end of the copied file. Thanks for your help. (3 Replies)
Discussion started by: snag49ers
3 Replies

8. Shell Programming and Scripting

HOW TO CHECK ONLY .C FILES EXISTS OR NOT IN A FOLDER using IF in C shell script?

Hi friends.. I hav a problem.... I dont know how to check .c files exists r not in a folder using IF in C shell script actually i tried like this if(=~ *.c) even though some .c files or there in the current folder..it is not entering int o the if control statement...... (17 Replies)
Discussion started by: p.hemadrireddy
17 Replies

9. Shell Programming and Scripting

How to check if database exists?

Hi folks! First off I'm working with a Sybase DB. I'm using you're basic ISQL command to connect to my Sybase DB... isql -S$DB_SERVER -D$DB_NAME -U$DB_USR -P$DB_PWD <<!EOF > $log_file My question is, is there a way to determine if a database exists using shell script? For example, if... (2 Replies)
Discussion started by: Fatbob
2 Replies

10. Shell Programming and Scripting

How to check if a direcorty exists?

Hi Good people :D How do I check if a directory exists, if it does then carry on rest of the script, otherwise exit. ------------- cd $mainfolder/system1 #unzips files arrived in last 24 hrs into temp directory find * -mmin -1440 -exec unzip {} \; I'd like to check here if temp... (2 Replies)
Discussion started by: SunnyK
2 Replies
Login or Register to Ask a Question