This is my shell script that receives a string as an input from the user from the stdin.
Lets say he enters
Now "cmd" variable will take the value "summary" and "input_file" will take "a.txt".
Isn't that right?
I want summary.awk to work on $input_file, based on what is present in $query.
Isn't my approach right?
But when I run the shell script,
I get "awk: cannot open summary (No such file or directory)
"
I never intended to pass "summary" as my input file.
But it is the 1st word of $query. Is it getting perceived as the input file?
Why so?
My understanding is as follows :
1. The 1st command line argument passed is treated as input file.
e.g. : awk 'code' file arg1 arg2 arg3
only file is treated as input file
2. If the input file is piped, it doesn't see any of the arguments as input files.
e.g. : cat file | awk 'code' arg1 arg2 arg3
arg1 is NOT treated as input file.
Am I right?
Can you please help me?
Last edited by radiohead_; 11-12-2012 at 06:39 AM..
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