just wondering if anyone could help me. I have a file containing a line:
W32i APP - 8.0.0.xxxxx shp 6SFE25~1.EXE
xxxxx are 5 digit numbers and the numbers are different for everytime. I want to be able to search for xxxxx and put it in a variable, so I can use this varibale. Do I use grep and sed?
a.txt
W32i APP - 8.0.0.xxxxx shp 6SFE25~1.EXE
code
num=$(< a.txt)
num=${num#*.0.0.} # "left" remove everything up to .0.0.
num=${num%% *} # "right" remove "all" after " " char
echo "num=${num}"
output xxxxx
You'll be glad that you spend time to understand the difference in how variable modifiers like ${num#xxx}, ${num##xx}, ${num%x}, ${num%%x} work. Advanced shells also support sed like substitutions, ${num/0/9} and ${num//0/9}.
IHTH
% and %% modifier, this code is a good example, i.e. only using % results in xxxxx shp, because the deletion starts at the right, finds the first ' ', and deletes to the end. With %%, the deleteion starts at the right, but then looks for all ' ' (moving to the right), and then deletes everything to the right, leaving only xxxxx. Good luck to all.#!/bin/sh
read < a.txt
[[ $REPLY =~ 8.0.0.([^\ ]*) ]]
echo ${BASH_REMATCH[1]}
output
xxxxx
