mknod(2) The full documentation for mknod is maintained as a Texinfo manual. If the info and mknod programs are properly installed at your site, the command info coreutils 'mknod invocation' should give you access to the complete manual.
MKNOD(1) User Commands MKNOD(1) NAME top mknod - make block or character special files SYNOPSIS top mknod [OPTION] NAME TYPE [MAJOR MINOR] DESCRIPTION top Create the special file NAME of the given TYPE. Mandatory arguments to long options are mandatory for short options too. mknod Name { p} Description. The mknod command makes a directory entry and corresponding i-node for a special file. The first parameter is the name of the entry device. Select a name that is descriptive of the device. The mknod command has two forms that have different flags. The code introduced here is meant to run with version 2.0 of the Linux kernel. In UNIX, Linux and similar operating systems, every device is identified by two numbers: a “major” number and a “minor” number. These numbers can be seen by invoking ls -l /dev. Every device driver registers its major number with the kernel and is completely If mode is not S_IFIFO or dev is not 0, the behavior of mknod() is unspecified." However, nowadays one should never use mknod() for this purpose; one should use mkfifo(3), a function especially defined for this purpose. Under Linux, mknod() cannot be used to create directories.
POSIX.1-2001 says: "The only portable use of mknod() is to create a FIFO-special file. If mode is not S_IFIFO or dev is not 0, the behavior of mknod() is unspecified." However, nowadays one should never use mknod() for this purpose; one should use mkfifo(3), a function especially defined for this purpose.
Sep 21, 2016 · The mknod system call is really not used to create devices in linux. The /dev/xxxx entries are created when a driver is loaded, and the driver registers with the kernel to allocate a device/unit value, which is only presented for legacy use - the kernel itself doesn't use them anymore as the directory entry in /dev (a devtmpfs filesystem Description. mkswap sets up a Linux swap area on a device or in a file.. The device argument will usually be a disk partition (something like /dev/sdb7) but can also be a file.The Linux kernel does not look at partition IDs, but many installation scripts will assume that partitions of hex type 82 (LINUX_SWAP) are meant to be swap partitions.
If mode is not S_IFIFO or dev is not 0, the behavior of mknod() is unspecified." However, nowadays one should never use mknod() for this purpose; one should use mkfifo(3), a function especially defined for this purpose. Under Linux, mknod() cannot be used to create directories.
However, nowadays one should never use mknod() for this purpose; one should use mkfifo(3), a function especially defined for this purpose. Under Linux, mknod() cannot be used to create directories. One should make directories with mkdir(2). There are many infelicities in the protocol underlying NFS. Some of these affect mknod() and mknodat(2). Nodes are created by the mknod system call. The command-line program for creating nodes is also called mknod. The command-line program for creating nodes is also called mknod. Nodes can be moved or deleted by the usual filesystem system calls ( rename , unlink ) and commands ( mv , rm ). For example, every character driver needs to define a function that reads from the device. The file_operations structure holds the address of the module's function that performs that operation. Here is what the definition looks like for kernel 2.6.5: