shell script error - linux

Question

I have a shell script like this.
line="$#" # get the complete first line which is the complete script path
name_of_file = ${line%.*}
file_extension = ${line##*.}
if [ $file_extension == "php"]
then
ps aux | grep -v grep | grep -q "$line" || ( nohup php -f "$line" > /var/log/iphorex/$name_of_file.log & )
fi
if [ $file_extension == "java"]
then
ps aux | grep -v grep | grep -q "$line" || ( nohup java -f "$name_of_file" > /var/log/iphorex/$name_of_file.log & )
fi
here line variable has values like /var/www/dir/myphp.php or /var/www/dir/myjava.java.
The purpose of shell script is to check if these processes are already running and if not i try to run them.I get the following errors.
name_of_file: command not found
file_extension: command not found
[: missing `]'
[: missing `]'
Any ideas?

Answer 1

Firstly, the shell processor treats the line:
name_of_file = ${line%.*}
as the execution of the command:
name_of_file
with the parameters:
= ${line%.*}
you need to write it as:
name_of_file=${line%.*}
This makes it into a variable=value. You need to repeat this for the file_extension = line as well.
Secondly, the if:
if [ $file_extension == "php"]
has exactly the same parsing problem, you must have a space before the trailing ], because otherwise the parser thinks you're checking if $file_extension is equal to the string: "php]"
if [ $file_extension == "php" ]

Answer 2

delete the spaces first, maybe this will help...
name_of_file=${line%.*}
file_extension=${line##*.}
EDIT
Try this:
if [ $file_extension="php" ]
..
if [ $file_extension="java" ]

Answer 3

The other answers are right that the problem in your script lies in stray spaces in your variable assignments and [ .. ] statements.
(off-topic. FYI)
I took the liberty of refactoring your script (untested!) just to highlight some alternatives, namely:
using pgrep instead of ps aux | grep .....
using case
-
#!/bin/bash
line="$#" # get the complete first line which is the complete script path
name_of_file=${line%.*}
pgrep "$line" > /dev/null && exit # exit if process running
case "${line##*.}" in # check file extension
php)
nohup php -f "$line" > /var/log/iphorex/$name_of_file.log &
;;
java)
nohup java -f "$name_of_file" > /var/log/iphorex/$name_of_file.log &
;;
esac