Unix Interview Questions and Answers


How do you create special files like named pipes and device files in UNIX OS?

The system call mknod creates special files in the following sequence.

1. kernel assigns new inode,

2. sets the file type to indicate that the file is a pipe, directory or special

3. If it is a device file, it makes the other entries like major, minor device numbers.

For example:

If the device is a disk, major device number refers to the disk controller and minor
device number is the disk.

Posted by:Richards