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Top Forums Shell Programming and Scripting Strange results from FDISK????? Post 302225900 by alirezan on Sunday 17th of August 2008 04:21:53 PM
Old 08-17-2008
Strange results from FDISK?????

Hi all,

I am writing script that returns the size of each disk or partition when called. I am using FDISK -l and parsing the results to get the result I want. When I execute fdisk -l it shows correct results, BUT when I execute the same thing with results to be put in a variable, I get strange results:

Quote:
[root@APPSERVER programs]# fdisk -l 2>/dev/null | grep /dev/hda1
/dev/hda1 * 1 2709 20480008+ 7 HPFS/NTFS
Quote:
[root@APPSERVER programs]# result=`fdisk -l 2>/dev/null | grep /dev/hda1`
[root@APPSERVER programs]# echo $result
/dev/hda1 duplicate linux Microsoft Word - This week..pdf partition redundancy week6.pdf windows 1 2709 20480008+ 7 HPFS/NTFS
[root@APPSERVER programs]#
When I want the output to be put in $result variable, fdisk -l returns the files in the folder as well. Another example: When I execute from /:

Quote:
[root@APPSERVER /]# result=`fdisk -l 2>/dev/null | grep /dev/hda1`
[root@APPSERVER /]# echo $result
/dev/hda1 backup backups bin boot dev dhcpcd etc extra home initrd lib lost+found media mnt opt partition proc root sbin srv sys tmp usr var 1 2709 20480008+ 7 HPFS/NTFS
Can anybody tell me why this thing happens? I'm running mandriva 2008.1 by the way.

Thanks
 

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FDISK(8)						      System Manager's Manual							  FDISK(8)

NAME
fdisk - partition a hard disk [IBM] SYNOPSIS
fdisk [-hm] [-sn] [file] OPTIONS
-h Number of disk heads is m -s Number of sectors per track is n EXAMPLES
fdisk /dev/hd0 # Examine disk partitions fdisk -h9 /dev/hd0 # Examine disk with 9 heads DESCRIPTION
When fdisk starts up, it reads in the partition table and displays it. It then presents a menu to allow the user to modify partitions, store the partition table on a file, or load it from a file. Partitions can be marked as MINIX, DOS or other, as well as active or not. Using fdisk is self-explanatory. However, be aware that repartitioning a disk will cause information on it to be lost. Rebooting the sys- tem immediately is mandatory after changing partition sizes and parameters. MINIX, XENIX, PC-IX, and MS-DOS all have different partition numbering schemes. Thus when using multiple systems on the same disk, be careful. Note that MINIX, unlike MS-DOS , cannot access the last sector in a partition with an odd number of sectors. The reason that odd partition sizes do not cause a problem with MS-DOS is that MS-DOS allocates disk space in units of 512-byte sectors, whereas MINIX uses 1K blocks. Fdisk has a variety of other features that can be seen by typing h. Fdisk normally knows the geometry of the device by asking the driver. You can use the -h and -s options to override the numbers found. SEE ALSO
part(8). FDISK(8)
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