Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

disklabel_dkcksum(3) [netbsd man page]

DISKLABEL_DKCKSUM(3)					   BSD Library Functions Manual 				      DISKLABEL_DKCKSUM(3)

NAME
disklabel_dkcksum -- compute the checksum for a disklabel LIBRARY
System Utilities Library (libutil, -lutil) SYNOPSIS
#include <util.h> uint16_t disklabel_dkcksum(struct disklabel *lp); DESCRIPTION
disklabel_dkcksum() computes the checksum for the disklabel passed in as lp. RETURN VALUES
The disklabel_dkcksum() returns the computed checksum. HISTORY
The disklabel_dkcksum() function call appeared in NetBSD 2.0. BSD
May 4, 2010 BSD

Check Out this Related Man Page

disklabel(8)						    BSD System Manager's Manual 					      disklabel(8)

NAME
disklabel -- manipulate and query an Apple Label disk label SYNOPSIS
disklabel -create disk-device [-msize=size] [property=value] [...] disklabel -status disk-device disklabel -properties disk-device [property[=value]] [...] disklabel -destroy disk-device DESCRIPTION
The disklabel utility manipulates ``Apple Label'' partition metadata. ``Apple Label'' partitions allow for a disk device to have a consis- tent name, ownership, and permissions across reboots, even though uses a dynamic pseudofilesystem for /dev. The ``Apple Label'' partition uses a set of metadata (as a plist) in a reserved area of the partition. This metadata describes the owner, name, and so forth. When -create is used, the -msize argument can specify the size of metadata area; the default is 128Kbytes. The default size unit is bytes, but the following suffixes may be used to multiply by the given factor: ``b'' (512), ``k'' (1024), ``m'' (1048576), and ``g'' (1073741824). Although any key-value pair can be specified for the properties, certain keys are used by the system: owner-uid The user (as either a string or numeric value) to own the device. owner-gid The group (as either a string or numeric value) associated with the device. owner-mode The permissions (as a numeric value) for the device. dev-name The name for the device. If the owner-uid and owner-gid properties are given as strings, the utility will attempt to look up the names (as users or groups, as appro- priate), and will store the numeric values in the metadata. If it cannot find the names, and the values are not given as numbers, it will print an error, and not store the key/value pairs in the metadata. The owner-mode property may be given in decimal, or in octal by using a preceding ``0'' (e.g., ``0666''). Any property may be forced to be treated as a string by enclosing it in double-quotation marks; bear in mind that shell escapes will probably be necessary in this sitation. The -properties directive can print out all keys (if no arguments are given), a requested set of keys (if a list of key names is given), or can modify (or add) keys (if a key-value pairs are given). also maintains a checksum of the metadata; the -status directive verifies this checksum. EXAMPLES
The following example will create a device with 1MByte of metadata area, owned by fred, with a device name of fred, and be writable by fred: disklabel -create /dev/rdisk1s1 -msize=1M owner-uid=fred dev-name=fred owner-mode=0644 The following example will then print out the key-value pairs from the above: disklabel -properties /dev/rdisk1s1 SEE ALSO
pdisk(8) BSD
September 3, 2004 BSD
Man Page

13 More Discussions You Might Find Interesting

1. Tips and Tutorials

Unix File Permissions

Introduction I have seen some misinformation regarding Unix file permissions. I will try to set the record straight. Take a look at this example of some output from ls: $ ls -ld /usr/bin /usr/bin/cat drwxrwxr-x 3 root bin 8704 Sep 23 2004 /usr/bin -r-xr-xr-x 1 bin bin ... (6 Replies)
Discussion started by: Perderabo
6 Replies

2. Shell Programming and Scripting

sorting left-justified numeric values

I have a file which looks roughly like this: 996 mmmmmmm 996 xxxxxxxxxxxxx 99600 ssssssssss 9964 fffffffffffff and would like to sort it numerically on the first field. I tried: sort -nr --key=1 .... The output I get is: 99600 ssssssssss 9964 ... (3 Replies)
Discussion started by: rovf
3 Replies

3. Programming

Memory Leaks

Suppose I have a main() function with only one malloc statement allocating say some 1 gb memory. Also say my system has 1 gb of ram. main() { malloc(1gb) return(0) } The program above exits without freeing the memory. In this case will the 1 gb of heap memory be returned... (9 Replies)
Discussion started by: rupeshkp728
9 Replies

4. Solaris

How to install PGX32 on Sparc 10 Ultra?

I'm trying to install a PGX32 video card on my Sparc 10 Ultra running Solaris 10. I've got the Oracle installation guide for it and I got as far as: "4. Insert the CD-ROM labeled “GFX OpenWindows for Solaris 2” into the drive." I don't have a CD-ROM by that name and a web search for that... (21 Replies)
Discussion started by: Michele31416
21 Replies

5. Shell Programming and Scripting

Better to Use Return Code or wc -l Output?

Hey All, Quick question... I'm writing a short script to check if a continuous port is running on a server. I'm using "ps -ef | grep -v grep | grep processName" and I was wondering if it was better/more reliable to just check the return code from the command or if its better to pipe to... (12 Replies)
Discussion started by: mrm5102
12 Replies

6. Shell Programming and Scripting

Vm versus physical linux server

Does anyone have a script that can be run to tell you if you are on either a VM Linux or a physical Linux server? (15 Replies)
Discussion started by: bigbenn
15 Replies

7. BSD

NetBSD 6.1.2: apm and admd not found

I installed NetBSD 6.1.2 amd64 and can't find the apm utility. Is it not in the base system? Is it necessary to recompile the default amd64 kernel to use apm? Or is there a new method for power management and suspend/resume? (2 Replies)
Discussion started by: bsdx
2 Replies

8. Shell Programming and Scripting

RFC - Korn shell prompt

Hi, I am learning shell scripting for the first time. I use AT&T Korn Shell, Version AJM 93u+ 2012-08-01, compiled from source on NetBSD. So far I have managed to set up what I think is a useful and pleasing shell prompt, which can be seen in the image attached to this post. The prompt is... (2 Replies)
Discussion started by: gezley
2 Replies

9. Shell Programming and Scripting

Make bold chars in UNIX

Hi all, I want to make the string as bold in unix. is there any way to acheive this? thanks in advance. (16 Replies)
Discussion started by: SekhaReddy
16 Replies

10. Shell Programming and Scripting

Adding a List of Times

Hey gang, I have a list of times I need to sum up. This list can vary from a few to a few thousand entries. Now I had found a closed reference to adding time titled "add up time with xx:yy format in bash how?" In it, the example works great for that formatted list of times... This is the reply code... (5 Replies)
Discussion started by: Brusimm
5 Replies

11. UNIX for Beginners Questions & Answers

BSD Unix Toolbox: 1000+ Commands for FreeBSD, OpenBSD, and NetBSD

Usually when I on the evening go to bed I take some interesting book with me. I read it for a while to get me down to sleep. Probably most people seek information from the Nett by googleing but I am so oldfashioned I prefer a real book ;) But what a book. The one I found and ordered is BSD Unix®... (0 Replies)
Discussion started by: fossiili
0 Replies

12. UNIX for Beginners Questions & Answers

Grandpa returning to UNIX

On the late 1960s I got short hands on experience with a russian "small" computer. It vas a copy of DEC's VAX ... and running some version of BSD-Unix. After that I worked in a university following the development of computing. After retire I started collecting old pc's and installing... (13 Replies)
Discussion started by: fossiili
13 Replies

13. UNIX for Beginners Questions & Answers

Grep command to show the number of results

Hi I wanted to know if there is an option in grep command to show the number of results (not the number of lines of findings). Thanks (14 Replies)
Discussion started by: abdossamad2003
14 Replies