From the USS User Guide, Ch. 14 (SA23-2279-30). A character special file defines one of the following: – A terminal (/dev/ptypnnnn and /dev/ttypnnnn). – The default controlling terminal for a process (/dev/tty). – A null file (/dev/null). Data written to this file is discarded; hence, it is known as the bit bucket. This file is always empty for reading. – A zero file (/dev/zero). Data written to this file is discarded and binary zeros are supplied for any amount read from it. – The random number files (/dev/random and /dev/urandom). These files provide random numbers for cryptographic purposes. – A file descriptor file (/dev/fdn or /dev/fd/n). – A system console file (/dev/console). Data that is written to this file is sent to the console using a write-to-operator (WTO) that displays the data on the system console. – A UNIX domain socket name file. This is a path name that specifies the socket address for a UNIX domain socket. The path name is assigned by the application programmer; there is no convention for the name. The operating system creates the file. – A Communications Server remote tty file (for example, rtynnnn) that corresponds to the requesting terminal on the originating Communications Server node. The name is assigned by the Communications Server administrator. – The Communications Server character special file (/dev/ocsadmin) that supports ioctl functions for Communications Server administrative functions. Character special files are dynamically created by the operating system when they are first referenced. However, they can also be explicitly created by a superuser (for instance, in order to assign different permissions).
Ant. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Jake Anderson Sent: Wednesday, 19 September 2018 2:23 PM To: [email protected] Subject: OMVS file type Char Hi I have got a dummy query I was going through /var/dpi_socket and see it's a Character special type of file I am going through the USS guide but I found any hit about this type of file. Also I can't select or copy this files . Can someone please explain what are Character special type file ? Jake ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
