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Full Discussion: Switch
Top Forums Programming Switch Post 84508 by blowtorch on Monday 26th of September 2005 08:52:40 AM
Old 09-26-2005
Quote:
Originally Posted by abey
thnx, tht works....

is there anyother option to implement this apart from switch, that wil reduce the number of lines.
Actually that's what you use switch for, it is much easier to read/debug switch statements than the if-else-if-else... combo. It also makes it easier to extend the program if you want to check for more conditions - you just have to add case statements as required instead of entire if-else blocks.

If you have more than two conditions to check for, you are best off using switch.
 

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

NAME
devswmgr - utility to manage the device switch database SYNOPSIS
/sbin/devswmgr [-option [parameter]] OPTIONS
Displays the following information about the device switch database: Whether a device switch database was read from the primary file or from a backup file The number of entries that are in the device switch table Displays the major numbers that have been reserved by all drivers, a named driver, or an instance of a named driver. A driver that requires more than one entry in the device switch table uses a unique instance number to reference each of its device switch table entries. Displays help for the devswmgr command. Releases all the major numbers for a device driver if just the driver name is specified. Releases one major number for a device driver if the NAME and the INSTANCENUM of the driver are speci- fied. DESCRIPTION
The devswmgr command helps you manage the device switch table by displaying information about the devices drivers in the table. You can also use the command to release device switch table entries. Typically, you release the entries for a driver after you have unloaded the driver and do not plan to reload it later. Releasing the entries frees them for use by other device drivers. EXAMPLES
The following example shows that a device switch table was loaded from the primary device and that there are 70 entries in it: % /sbin/devswmgr -display Device switch information device switch database read from primary file device switch table has 70 entries The following example shows the major numbers in the device switch table that have been reserved for the driver named cam_disk: % /sbin/devswmgr -getnum driver=cam_disk Device switch reservation list (*=entry in use) driver name instance major ------------------------------- -------- ----- cam_disk 1 8* FILES
The file that manages the device switch databases The primary device switch database file The backup device switch database file SEE ALSO
Commands: scsimgr(8) devswmgr(8)
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