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28 .\" @(#)mknod.2 8.1 (Berkeley) 6/4/93
36 .Nd make a special file node
42 .Fn mknod "const char *path" "mode_t mode" "dev_t dev"
44 .Fn mknodat "int fd" "const char *path" "mode_t mode" "dev_t dev"
48 is created with the file type and access permissions specified in
50 The access permissions are modified by the process's umask value.
54 indicates a block or character special file,
56 is a configuration dependent specification denoting a particular device
65 requires super-user privileges.
69 system call is equivalent to
71 except in the case where
73 specifies a relative path.
74 In this case the newly created device node is created relative to the
75 directory associated with the file descriptor
77 instead of the current working directory.
80 is passed the special value
84 parameter, the current working directory is used and the behavior is
85 identical to a call to
93 will fail and the file will be not created if:
96 A component of the path prefix is not a directory.
97 .It Bq Er ENAMETOOLONG
98 A component of a pathname exceeded 255 characters,
99 or an entire path name exceeded 1023 characters.
101 A component of the path prefix does not exist.
103 Search permission is denied for a component of the path prefix.
105 Too many symbolic links were encountered in translating the pathname.
107 The process's effective user ID is not super-user.
109 An I/O error occurred while making the directory entry or allocating the inode.
111 Corrupted data was detected while reading from the file system.
113 The directory in which the entry for the new node is being placed
114 cannot be extended because there is no space left on the file
115 system containing the directory.
117 There are no free inodes on the file system on which the
118 node is being created.
120 The directory in which the entry for the new node
121 is being placed cannot be extended because the
122 user's quota of disk blocks on the file system
123 containing the directory has been exhausted.
125 The user's quota of inodes on the file system on
126 which the node is being created has been exhausted.
128 The named file resides on a read-only file system.
130 The named file exists.
135 points outside the process's allocated address space.
137 Creating anything else than a block or character special
143 In addition to the errors returned by the
152 argument does not specify an absolute path and the
156 nor a valid file descriptor open for searching.
160 argument is not an absolute path and
164 nor a file descriptor associated with a directory.
174 system call follows The Open Group Extended API Set 2 specification.
182 system call appeared in