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Full Discussion: Reading a file line by line and print required lines based on pattern
Top Forums UNIX for Beginners Questions & Answers Reading a file line by line and print required lines based on pattern Post 303040524 by balu1234 on Wednesday 30th of October 2019 04:44:23 PM
Old 10-30-2019
Reading a file line by line and print required lines based on pattern
Hi All,

i want to write a shell script read below file line by line and want to exclude the lines which contains empty value for MOUNTPOINT field.

i am using centos 7 Operating system.

want to read below file.

Code:
[root@matilda final]# cat /tmp/d5
NAME="/dev/sda" TYPE="disk" SIZE="60G" OWNER="root" GROUP="disk" MODE="brw-rw----" PKNAME="" MOUNTPOINT=""
NAME="/dev/sda1" TYPE="part" SIZE="500M" OWNER="root" GROUP="disk" MODE="brw-rw----" PKNAME="/dev/sda" MOUNTPOINT="/boot"
NAME="/dev/sda2" TYPE="part" SIZE="29.5G" OWNER="root" GROUP="disk" MODE="brw-rw----" PKNAME="/dev/sda" MOUNTPOINT=""
NAME="/dev/mapper/centos-root" TYPE="lvm" SIZE="56.5G" OWNER="root" GROUP="disk" MODE="brw-rw----" PKNAME="/dev/sda2" MOUNTPOINT="/"
NAME="/dev/mapper/centos-swap" TYPE="lvm" SIZE="3G" OWNER="root" GROUP="disk" MODE="brw-rw----" PKNAME="/dev/sda2" MOUNTPOINT="[SWAP]"
NAME="/dev/sda3" TYPE="part" SIZE="30G" OWNER="root" GROUP="disk" MODE="brw-rw----" PKNAME="/dev/sda" MOUNTPOINT=""
NAME="/dev/mapper/centos-root" TYPE="lvm" SIZE="56.5G" OWNER="root" GROUP="disk" MODE="brw-rw----" PKNAME="/dev/sda3" MOUNTPOINT="/"
NAME="/dev/sr0" TYPE="rom" SIZE="603M" OWNER="root" GROUP="cdrom" MODE="brw-rw----" PKNAME="" MOUNTPOINT=""

Desired output :

Code:
Mountpoint:"/boot"
 Type:"part"

Mountpoint:"/"
 Type:"lvm"
Mountpoint:"[SWAP]"
 Type:"lvm"

Mountpoint:"/"
 Type:"lvm"

i am using below shell script , but i am unable to ignore the lines which contains Mountpoint value is empty.


My Script :
Code:
#!/bin/bash
FILE=/tmp/d5
while read LINE; do
mountpoint=$(echo "$LINE" | awk -F " " '{print$8}'|awk -F "=" '{print$2}')

disk=$(echo "$LINE" | awk -F " " '{print$1}'|awk -F "=" '{print$2}')
Type=$(echo "$LINE" | awk -F " " '{print$2}'|awk -F "=" '{print$2}')

if [ "$mountpoint" != "" ];then

      echo -e "Mountpoint:$mountpoint \n Type:$Type"

fi
done < $FILE

i am getting below output ;

Code:
Mountpoint:""
 Type:"disk"
Mountpoint:"/boot"
 Type:"part"
Mountpoint:""
 Type:"part"
Mountpoint:"/"
 Type:"lvm"
Mountpoint:"[SWAP]"
 Type:"lvm"
Mountpoint:""
 Type:"part"
Mountpoint:"/"
 Type:"lvm"
Mountpoint:""
 Type:"rom"

Can someone please help me on this issue.
Last edited by jim mcnamara; 10-30-2019 at 06:34 PM..
 

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