Visit Our UNIX and Linux User Community


File existence


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting File existence
# 1  
Old 07-20-2011
File existence

Hi

I'm using the below command in shell script to check for file exists in the path

if [ ! -r $path/$test.csv ]
.....
fi

path and test are variables

path and the file exists but the commands inside if condition is executed (! operator used)

Is the above way of checking for file existence is correct?

Thanks
# 2  
Old 07-20-2011
Code:
if [[ -e $path/$test.csv ]]; then
   ...
fi

Check the man page for test to see your option for switches.
This User Gave Thanks to zaxxon For This Post:
# 3  
Old 07-20-2011
try this:

Code:
path=/home/something
filename=nameof_file
completepath=$path/$filename

if [ ! -r $completepath ] ; then
echo "NOT exits"
else
echo "Exists"
fi

# 4  
Old 07-20-2011
..

Thanks it works

I have another question. Declared a variable like test="../path"

Referring the variable as $test/file_name.txt

Where does the directory 'path' needs to be created in the current directory? exists but still errors and in the directory before also exists

what does .. refers to?
# 5  
Old 07-20-2011
.. refers to the next upper level of the current directory structure. When you have a script that is being executed from any path, it might be safer to use absolute paths instead.
This User Gave Thanks to zaxxon For This Post:

Previous Thread | Next Thread
Test Your Knowledge in Computers #781
Difficulty: Medium
At 17, Bill Gates formed a venture with Steve Ballmer called Traf-O-Data to make traffic counters based on the Intel 8008 processor.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

File existence

Hope someone can help me on this In a directory ,files are dynamically generated.I need a script to do the following if files are not received for more than 2 hours or if the received file is empty then do something How can I put that in a script.Thank you eg. in cd /dir_name the... (13 Replies)
Discussion started by: haadiya
13 Replies

2. Shell Programming and Scripting

Script to check for the file existence, if file exists it should echo the no of modified days

Hi, I am looking for a shell script with the following. 1. It should check whether a particular file exists in a location #!/bin/sh if ; then echo "xxx.txt File Exists" else echo "File Not Found" fi 2. If file exists, it should check for the modified date and run a command... (2 Replies)
Discussion started by: karthikeyan_mac
2 Replies

3. Shell Programming and Scripting

Parse file from remote server to calculate count of string existence in that file

Hi I need to parse the file of same name which exist on different servers and calculate the count of string existed in both files. Say a file abc.log exist on 2 servers. I want to search for string "test" on both files and calculate the total count of search string's existence. For... (6 Replies)
Discussion started by: poweroflinux
6 Replies

4. Shell Programming and Scripting

File existence and increment

count=0; while read line; do ] && let count=count+1; done < file_name.txt echo echo "$count of 10 files found " echo The scenario is a follows : I have a file which contains a list of filenames present in particular directory . I am checking fo the existence of the file and... (5 Replies)
Discussion started by: ultimatix
5 Replies

5. AIX

Check for File Existence

I have requirement where i need to search for files which start with SALESORDER and PURCHASEORDER. i need to process the files with SALESORDER first and then PURCHASEORDER. If SALESORDER files are not there i dont want to process PURCHASEORDER and i want to come out of script. I have written a code... (4 Replies)
Discussion started by: dsdev_123
4 Replies

6. AIX

check for file existence

Hello I am having a requirement like if there is no file in the directory then i need a message to pop on after the execution of the script. My script basically does for File in `ls -t $DIRECTORY | tail -1`; if there is no file the DIRECTORY then the script is simply exiting with out... (2 Replies)
Discussion started by: dsdev_123
2 Replies

7. Shell Programming and Scripting

File existence using ls

Hi I want to check a particular file is available or not. But i know only the pattern of that file sat AB1234*.txt.I need the latest file name and it ll be used in the script. How can i do this using ls -ltr command. Thanks, LathishSundar V (2 Replies)
Discussion started by: lathish
2 Replies

8. Shell Programming and Scripting

checking file existence

Hi, My requirement was to check the existence of a file having a specified pattern.The way i tried to achieve this was if ; then echo "File found" fi an example file having this pattern was 'ilvs_trace01.0124'. it will vary... (3 Replies)
Discussion started by: DILEEP410
3 Replies

9. Shell Programming and Scripting

File existence

Hey all, I have total new with shell scripting so I don't know if what I need to do even possible, here it is...for a duration of time (say...1 hour) I need to check for the existence of a particular file, if it exists then I will invoke a java program or I will continue to check until a)... (2 Replies)
Discussion started by: mpang_
2 Replies

10. UNIX for Dummies Questions & Answers

Loop for file existence

I wasn't sure if I should post it here of in the Shell Script category, but I figured it was definitely a newbie question. I'm trying to write a script that will check for the existence of a specific file (or for any files within the directory) and then take specific actions. I've removed all... (2 Replies)
Discussion started by: bd_joy
2 Replies

Featured Tech Videos