delete_ext_filename.sh
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#!/bin/bash
# Author : Quach Chi Cuong
# Glit.io : https://glot.io/snippets/eimk2oh49q
# Website : https://cuongquach.com/download/shellscripts/excersie/delete_ext_filename.sh.txt
#
# De bai :
# Xoa phan extension cua 1 ten file name.
#VAR1=$1
VAR1="backup_full.2016-06-01.txt"
#VAR1="lady_gaga.music.mp3"
FLAG=0
if [ ! -z ${VAR1} ];then
for i in `seq 1 ${#VAR1}`
do
CHAR=$(echo ${VAR1: -${i}:1})
if [[ ${CHAR} == "." ]];then
POS=`expr ${#VAR1} - $i`
FLAG=1
break
fi
done
if [ ${FLAG} -eq 0 ];then
echo "Input = ${VAR1}"
echo "Output = ${VAR1}"
echo "- No extension name of file."
else
# In string tu index 0 den gia tri gan dau '.' index
echo "Input = ${VAR1}"
echo "Output = ${VAR1:0:${POS}}"
fi
else
echo "- Variable input is null. Exit"
fi
exit 0
Bash
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