Question:
How to take a whole line as argument In bash script?

In a Bash script, you can take a whole line as an argument by using the special variable space “ , “ and you can set the default seperator to “ \n ” with IFS=$'\n' when you want do seperate by line.

Let suppose you have a file ‘zz’

wire [3:0] dcs_ctrl


And you wnat to print this file like this

wire [3:0] dcs_ctrl0

wire [3:0] dcs_ctrl1

wire [3:0] dcs_ctrl2

wire [3:0] dcs_ctrl3


For this, you have to do the operation for the whole line manually (like print the whole line 4 times as following).

for i in `cat zz`; do for j in {0..3}; do echo "$i"; done; done


However, using the default seperator in bash is space  , and you can set the default seperator to \n with IFS=$'\n', you can separately do it using the below code

$ cat zz

wire [3:0] dcs_ctrl


$ IFS=$'\n'; for i in `cat zz`; do for j in {0..3}; do echo "$i"; done; done

wire [3:0] dcs_ctrl

wire [3:0] dcs_ctrl

wire [3:0] dcs_ctrl

wire [3:0] dcs_ctrl


Answered by: >LF-DevJourney

Credit:> StackOverflow


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