Questions about using shell variables in awk

Questions about using shell variables in awk

Author: swysn published at: 2002/03/22 05:01 pm

[This post was last edited by Valentine at] 2002/01/01 1312 32132 AA 32132131 #! /Bin/sh Echo "Enter :" Read key Cat TT | awk '{If (prev = "$ key") print; Prev = $1} The above content If I lose: 2002/01/01 No result output! Again wrong?

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Valentine Posted on: 2002/03/23 AM [This post was last edited by Valentine at] You have a good idea, but the variables cannot be used in awk. You can simply change them to the following form. Echo "Enter :" Read key Export key Cat filename | awk '{If (prev = environ ["key"]) print; Prev = $1 }' You can also: Echo "Enter :" Read key Cat filename | awk '{If (prev = "' $ key'") print; Prev = $1 }' There are many other methods. I will not list them one by one. You can view the awk-related posts.   Pdyhww Posted on: Moderator. Is there any other way to use shell variables in awk? Except for: Export value A = environ ['key']   Binary Posted on: -V option can also specify a variable This question has been discussed before. Search for it.   Dedicated for victory Posted on: 2002/11/06 I will use the shell variable to pass it to awk, especially when the passed variable features (> 399 bytes !!! Export A = "hello" Awk 'in in {"Echo $ A" | Getline X; print X ;}'   Masher Posted on: 2002/11/07 pm Var1 = ABCD Var2 = efgh Echo "" | awk-V First = $ var1-V Second = $ var2 '{print first "" Second }' [Display] abcdefgh