Programming Forums > Script Programming > Bash / Shell Scripting

niteice · Aug 21st, 2005, 8:44 PM

I'm working on an automated installer for Slackware Linux, much like Windows unattended setup, which simply reads configuration from unattend.inf. I'm trying to find a decent way to replicate the config file, and have no clue on how to use bash to read in from a file like so:

(Toggle Plain Text)

RootPartition=/dev/hda2

and assign the root partition to /dev/hda2. I'm almost thinking a script like so:

(Toggle Plain Text)

#!/bin/sh
ROOT=/dev/hda2
SWAP=/dev/hda3
KERNEL=bareacpi.i
etc.
export ROOT
export SWAP
export KERNEL
etc.

would be the best route, with the setup scripts then finding $ROOT, $SWAP, etc., but certainly there's a better method?

Dizzutch · Aug 22nd, 2005, 10:13 AM

look up the Bash Advanced Guide. You can read in the text line by line, then parse the string splitting it by the '=' the left variable will become the name, the right variable will become the value. If the parser sees the 'export' keyword, it reads the line in differently, namely it splits the line by the ' ' and the left part gets discarded, while the right part gets added to an array of modules to export. Or something like that.
Good luck
Dizz

DaveQB · May 18th, 2006, 4:42 AM

I normally just source the config file.

Something like:
[ -f config.conf ] && . config.conf

Infinite Recursion · May 18th, 2006, 9:08 AM

Ummm, this thread was just about a year old !?!? -- ?!?!?

DaWei · May 18th, 2006, 9:44 AM

Happy birthday, thread

.

DaveQB · May 19th, 2006, 4:06 AM

So it is. Found it on the first page so didn't think it would be any more then a few days old. I guess I need to get used to the pace of these forums.

Infinite Recursion · May 19th, 2006, 9:51 AM

Apparently, my original reply didn't go through... so here it is in summary.

--
I could see where that is a bit misleading. Fortunately, the other sections have a faster pace. Hopefully, we can spark some life back into this one.

jim mcnamara · May 19th, 2006, 8:14 PM

Quote:

Originally Posted by DaveQB

So it is. Found it on the first page so didn't think it would be any more then a few days old. I guess I need to get used to the pace of these forums.

Try the Lounge - it has about 90% of all the posts on the site..

And, Dawei has about 40% of all posts on the site. You do the math...

Because of the dearth of new threads, every new programming question gets jumped on right away. This is good for the questioner. Assuming he/she follows the Forum rules.

DaWei · May 19th, 2006, 8:21 PM

That's FOUR percent, not FORTY :p . An' I ain' th' top poster

.

Ooble · May 20th, 2006, 2:17 PM

The rate you're going, you will be soon. Wait until I get stuck into my exams... you'll blaze past me like a rat with its tail on fire.

Aug 21st, 2005, 8:44 PM	#1
niteice Programmer Join Date: Aug 2005 Posts: 98 Rep Power: 4	Read configuration from a text file? I'm working on an automated installer for Slackware Linux, much like Windows unattended setup, which simply reads configuration from unattend.inf. I'm trying to find a decent way to replicate the config file, and have no clue on how to use bash to read in from a file like so: (Toggle Plain Text) RootPartition=/dev/hda2 RootPartition=/dev/hda2 and assign the root partition to /dev/hda2. I'm almost thinking a script like so: (Toggle Plain Text) #!/bin/sh ROOT=/dev/hda2 SWAP=/dev/hda3 KERNEL=bareacpi.i etc. export ROOT export SWAP export KERNEL etc. #!/bin/sh ROOT=/dev/hda2 SWAP=/dev/hda3 KERNEL=bareacpi.i etc. export ROOT export SWAP export KERNEL etc. would be the best route, with the setup scripts then finding $ROOT, $SWAP, etc., but certainly there's a better method?

Aug 22nd, 2005, 10:13 AM	#2
Dizzutch Professional Programmer Join Date: Dec 2004 Location: Worcester, MA Posts: 441 Rep Power: 4	look up the Bash Advanced Guide. You can read in the text line by line, then parse the string splitting it by the '=' the left variable will become the name, the right variable will become the value. If the parser sees the 'export' keyword, it reads the line in differently, namely it splits the line by the ' ' and the left part gets discarded, while the right part gets added to an array of modules to export. Or something like that. Good luck Dizz __________________ naked pictures of you \| PFO F@H stats

May 18th, 2006, 9:08 AM	#4
Infinite Recursion Programming Guru Join Date: Jul 2004 Location: United States Posts: 3,467 Rep Power: 8	Ummm, this thread was just about a year old !?!? -- ?!?!? __________________ http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root."

May 18th, 2006, 9:44 AM	#5
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	Happy birthday, thread . __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

May 19th, 2006, 9:51 AM	#7
Infinite Recursion Programming Guru Join Date: Jul 2004 Location: United States Posts: 3,467 Rep Power: 8	Apparently, my original reply didn't go through... so here it is in summary. -- I could see where that is a bit misleading. Fortunately, the other sections have a faster pace. Hopefully, we can spark some life back into this one. __________________ http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root."

May 18th, 2006, 4:42 AM	#3
DaveQB Newbie Join Date: Apr 2006 Location: Sydney Posts: 14 Rep Power: 0	I normally just source the config file. Something like: [ -f config.conf ] && . config.conf

May 19th, 2006, 4:06 AM	#6
DaveQB Newbie Join Date: Apr 2006 Location: Sydney Posts: 14 Rep Power: 0	So it is. Found it on the first page so didn't think it would be any more then a few days old. I guess I need to get used to the pace of these forums.

May 19th, 2006, 8:21 PM	#9
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	That's FOUR percent, not FORTY :p . An' I ain' th' top poster . __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

May 20th, 2006, 2:17 PM	#10
Ooble I eat cake for breakfast. Join Date: Jul 2004 Location: In my box. Posts: 4,434 Rep Power: 9	The rate you're going, you will be soon. Wait until I get stuck into my exams... you'll blaze past me like a rat with its tail on fire. __________________ Me :: You :: Them

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Programming Forums > Script Programming > Bash / Shell Scripting

Read configuration from a text file?