RTEMS 4.8.0 On-Line Library

Files and Directories Manager mknod - create a directory

RTEMS POSIX API User's Guide

4.4.34: mknod - create a directory

CALLING SEQUENCE:

#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>

long mknod(
  const char *pathname,
  mode_t      mode,
  dev_t       dev
);

STATUS CODES:

mknod returns zero on success, or -1 if an error occurred (in which case, errno is set appropriately).

ENAMETOOLONG: pathname was too long.
ENOENT: A directory component in pathname does not exist or is a dangling symbolic link.
ENOTDIR: A component used in the directory pathname is not, in fact, a directory.
ENOMEM: Insufficient kernel memory was available
EROFS: pathname refers to a file on a read-only filesystem.
ELOOP: pathname contains a reference to a circular symbolic link, ie a symbolic link whose expansion contains a reference to itself.
ENOSPC: The device containing pathname has no room for the new node.

DESCRIPTION:

mknod attempts to create a filesystem node (file, device special file or named pipe) named pathname, specified by mode and dev.

mode specifies both the permissions to use and the type of node to be created.

It should be a combination (using bitwise OR) of one of the file types listed below and the permissions for the new node.

The permissions are modified by the process's umask in the usual way: the permissions of the created node are (mode & ~umask).

The file type should be one of S_IFREG, S_IFCHR, S_IFBLK and S_IFIFO to specify a normal file (which will be created empty), character special file, block special file or FIFO (named pipe), respectively, or zero, which will create a normal file.

If the file type is S_IFCHR or S_IFBLK then dev specifies the major and minor numbers of the newly created device special file; otherwise it is ignored.

The newly created node will be owned by the effective uid of the process. If the directory containing the node has the set group id bit set, or if the filesystem is mounted with BSD group semantics, the new node will inherit the group ownership from its parent directory; otherwise it will be owned by the effective gid of the process.

NOTES:

NONE

RTEMS POSIX API User's Guide