Extracting Details from string -- Help Me!!!

Shell Programming and Scripting
1

Hi Experts,

I am executing a script in bash profile and having file path as follows:

$FilePath=$HOST_NAME_LAND/home/chandan/abc.txt

where $HOST_NAME_LAND is an environment variable which points to the server name.

export $HOST_NAME_LAND=//<server name>

The environment variable name and server name may vary for different modules.

What I need is to separate the file path( /home/chandan/abc.txt ) from the environment variable( $HOST_NAME_LAND ), to check the existence of the file on that server?

Need your help!!

Thanks in advance.

Thanks,
Upayan

2 
 echo $FilePath | cut -d"/" -f1

 echo "$FilePath" | sed   's/$HOST_NAME_LAND//'
3

Try:

[ -f ${FilePath#$HOST_NAME_LAND} ] && echo "File Exists"
4

Thanks Panayam and Chacko193.

This is not going to resolve the issue because the environment variable name, file name and file path will vary module wise. So, I need a more generic approach.

Thanks,
ChandanN

5

Try:

[ -f ${FilePath#//[a-zA-Z]*} ] && echo "File exists"

This assumes that the expansions of HOST_NAME_LAND and the other evn variables containing the server name starts with // (as per your OP) and they only contain alphabets.

If they contain numerals as well , try:

[ -f ${FilePath#//[a-zA-Z0-9]*} ] && echo "File exists"
6

Which language/shell are you using? the above is not a valid shell syntax.
Also, as others asked, if you want to be generic, please provide the criteria based on which the file name can be extracted.

7

Assuming your variable assignments did work, and that you are using a recent shell,

echo $FilePath
//<server name>/home/chandan/abc.txt
echo /${FilePath#//*/}
/home/chandan/abc.txt

should work.