4.4BSD/usr/share/man/cat2/mknod.0

MKNOD(2)                    BSD Programmer's Manual                   MKNOD(2)

NNAAMMEE
     mmkknnoodd - make a special file node

SSYYNNOOPPSSIISS
     ##iinncclluuddee <<uunniissttdd..hh>>

     _i_n_t
     mmkknnoodd(_c_o_n_s_t _c_h_a_r _*_p_a_t_h, _m_o_d_e___t _m_o_d_e, _d_e_v___t _d_e_v);

DDEESSCCRRIIPPTTIIOONN
     The device special file _p_a_t_h is created with the major and minor device
     numbers extracted from _m_o_d_e_. The access permissions of _p_a_t_h are descen-
     dant from the umask(2) of the parent process.

     If _m_o_d_e indicates a block or character special file, _d_e_v is a configura-
     tion dependent specification of a character or block I/O device and the
     superblock of the device.  If _m_o_d_e does not indicate a block special or
     character special device, _d_e_v is ignored.

     MMkknnoodd() requires super-user privileges.

RREETTUURRNN VVAALLUUEESS
     Upon successful completion a value of 0 is returned.  Otherwise, a value
     of -1 is returned and _e_r_r_n_o is set to indicate the error.

EERRRROORRSS
     MMkknnoodd() will fail and the file will be not created if:

     [ENOTDIR]     A component of the path prefix is not a directory.

     [EINVAL]      The pathname contains a character with the high-order bit
                   set.

     [ENAMETOOLONG]
                   A component of a pathname exceeded 255 characters, or an
                   entire path name exceeded 1023 characters.

     [ENOENT]      A component of the path prefix does not exist.

     [EACCES]      Search permission is denied for a component of the path
                   prefix.

     [ELOOP]       Too many symbolic links were encountered in translating the
                   pathname.

     [EPERM]       The process's effective user ID is not super-user.

     [EPERM]       The pathname contains a character with the high-order bit
                   set.

     [EIO]         An I/O error occurred while making the directory entry or
                   allocating the inode.

     [ENOSPC]      The directory in which the entry for the new node is being
                   placed cannot be extended because there is no space left on
                   the file system containing the directory.

     [ENOSPC]      There are no free inodes on the file system on which the
                   node is being created.

     [EDQUOT]      The directory in which the entry for the new node is being
                   placed cannot be extended because the user's quota of disk
                   blocks on the file system containing the directory has been

                   exhausted.

     [EDQUOT]      The user's quota of inodes on the file system on which the
                   node is being created has been exhausted.

     [EROFS]       The named file resides on a read-only file system.

     [EEXIST]      The named file exists.

     [EFAULT]      _P_a_t_h points outside the process's allocated address space.

SSEEEE AALLSSOO
     chmod(2),  stat(2),  umask(2)

HHIISSTTOORRYY
     A mmkknnoodd function call appeared in Version 6 AT&T UNIX.

4th Berkeley Distribution        June 4, 1993                                2