mjhjmtu

File URLs.txt:

$ cat URLs.txt
www.google.com >/path/to/save

That's my script:

dl_url() xargs
 done
 done < ./URLs.txt
 done


google.com() 
 while true; do
 echo "blah blah blah"
 done

It's only printing the URLs hostname not start proper function this should start another function depends on URL like google.com start google.com function, how change that?

Not sure why you have all those infinitely repeating while loops in there. As Andy pointed out your awk statement is strange and likely not going to do what you want it to. The below script should work better for your purposes.

#!/bin/bash
cleanup() 
 if [[ $1 == "www.google.com" ]]; then 
 echo "blah blah blah" 
 else 
 echo "url not found" 
 fi 
 

while IFS='>' read -r website_url gallery_dir; do

 echo "Downloading $website_url" 
 echo "To $gallery_dir"; sleep 1 
 mkdir -p ./update_photo_temp/ 
 wget --quiet $website_url -P ./update_photo_temp/

 for i in $website_url; do 
 cleanup $i 
 done 

done < ./URLs.txt 

To answer the question in the title, as I understood it: You want to read lines of input, and for each that is equal to the name of a shell function, run that function.

You can use declare -f func to see if func is defined, so something like this:

#!/bin/bash

foo() echo foofoo; 
bar() echo barbar; 
while read funcname; do
 if declare -f "$funcname" &> /dev/null; then
 "$funcname"
 fi
done

Note that in your code:

IFS='>' read -r website_url gallery_dir

leaves the space before > in website_url, since the IFS you set here doesn't contain any whitespace. You could use IFS='> ' read ... instead.

for i in $website_url; do
 echo $i | awk -F '/.' 'print $2' | xargs
done

I'm not sure what this is supposed to do. for i in $website_url splits and globs the value of the variable, and has i loop over the values. The xargs at the end of the pipeline echoes whatever it gets as input. None of that runs any functions. Also, the awk field separator /. matches a slash followed by any character, so if the input was e.g. foo/bar, the resulting output would be ar.