#Ls dcommand driver#

The z/OS FTP client sends an NLST command to the server as part of ls subcommand processing. This setting affects processing of the NLST command.

#Ls dcommand driver#

The major number is used to point to the device driver that controls the device, while the minor number is a private field used by the device driver. Following is an example of ls with SITE NOLISTSUBdir. Device special files are created with the mknod command as follows:įor example, to create the above two files, execute the following commands: For block devices, data is accessed in fixed-size blocks while for character devices data can be accessed in multiple different sized blocks ranging from a single character upwards.

You will see the file permissions, the number of links, owner name, owner group, file size, time of last modification, and the file or directory name. This shows a lot more information presented to the user than the standard command. Block devices are represented by the letter b while character devices are represented by the letter c. The -l option signifies the long list format. This letter indicates the type of device that this file represents.

In this example there are two device files denoted by the b and c as the first character displayed on each line. One noticeable difference between special files and other file types can be seen by issuing an ls command as followsīrw- 1 root root 142,4002 /dev/vx/dsk/homedg/hĬrw- 1 root root 142,4002 Dec 5 21:48 /dev/vx/rdsk/homedg/h Thus, callers are able to invoke open(), read(), and write() in the same way that these system calls can be used on regular files. The goal here is to be able to access a device using the same mechanisms by which regular files and directories can be accessed. A special file is a file that has no associated storage but can be used to gain access to a device.