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Top Forums Shell Programming and Scripting Shell script to read specified value from file and echo to the same location to other file. Post 302915078 by ausdim on Sunday 31st of August 2014 09:10:22 AM
Old 08-31-2014
Lightbulb Shell script to read specified value from file and echo to the same location to other file.

Hello.
I want to to backup some "default:" values from a file do some other job and after restore that "default:" values back.

The problem is that the source and destination file has a lot of default: strings in it but with different values...

So..
Here is an example:

A part of my source file named "config.json".

Code:
    { SPane:{ 
        title:"Blinking effect",
        description:"Control the way the LED blinks."
    }},
    { SCheckBox:{
        description:"Completely disable led notifications.", 
        label:"Disable LED",
        default:0,
                action:"generic /sys/class/sec/led/led_completely_disable"
    }},
    { SCheckBox:{
        description:"If disabled, the controller bypasses slope generation.", 
        label:"Enable LED fading",
        default:1,
                action:"generic /sys/class/sec/led/led_fade"
    }},
    { SSeekBar:{
        title:"Fade-in time period",
        description:"Sets the time period of the rising slope.",
        min:0, max:12, unit:"ms", step:1,
        default:2,
                action:"generic /sys/class/sec/led/led_fade_in_time"
    }},
    { SSeekBar:{
        title:"Fade-out time period",
        description:"Sets the time period of the falling slope.",
        min:0, max:20, unit:"ms", step:1,
        default:8,
                action:"generic /sys/class/sec/led/led_fade_out_time"
    }},

With the code:
Code:
echo "$(cat config.json | grep default: | awk -F default '{print $2 }' | awk -F , '{print $1 }')" > def;

This it will output all default values to "def" file.
Like:
Code:
:0
:1
:2
:8

Note that some values also have strings in it...

So after some other commands the source file change those default values and simply Smilie i want to restore those values from "def" file to "config.json" file.

Wish to explain it ok.

Thanks

Last edited by ausdim; 08-31-2014 at 01:58 PM..
 

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idevicebackup2(1)					      General Commands Manual						 idevicebackup2(1)

NAME
idevicebackup2 - Create or restore backup for iDevices running iOS4+. SYNOPSIS
idevicebackup2 [OPTIONS] CMD [CMDOPTIONS] DIRECTORY DESCRIPTION
Create or restore backup from the current or specified directory. OPTIONS
-u, --uuid UUID target specific device by its 40-digit device UUID. -d, --debug enable communication debugging. -h, --help prints usage information. COMMANDS
backup create backup for the device. restore restore last backup to the device. --system restore system files, too. --reboot reboot the system when done. --copy create a copy of backup folder before restoring. --settings restore device settings from the backup. info show details about last completed backup of device. list list files of last completed backup in CSV format. unback unpack a completed backup in DIRECTORY/_unback_/. AUTHORS
Martin Szulecki Nikias Bassen SEE ALSO
idevicebackup(1) idevicebackup2(1)
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