1.\" Copyright (c) 1983, 1991 The Regents of the University of California. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)mkdir.2 6.7 (Berkeley) 3/10/91 33.\" 34.Dd March 10, 1991 35.Dt MKDIR 2 36.Os BSD 4.2 37.Sh NAME 38.Nm mkdir 39.Nd make a directory file 40.Sh SYNOPSIS 41.Fd #include <sys/stat.h> 42.Ft int 43.Fn mkdir "const char *path" "mode_t mode" 44.Sh DESCRIPTION 45The directory 46.Fa path 47is created with the access permissions specified by 48.Fa mode 49and restricted by the the 50.Xr umask 2 51of the calling process. 52.Pp 53The directory's owner ID is set to the process's effective user ID. 54The directory's group ID is set to that of the parent directory in 55which it is created. 56.Sh RETURN VALUES 57A 0 return value indicates success. A -1 return value 58indicates an error, and an error code is stored in 59.Va errno . 60.Sh ERRORS 61.Fn Mkdir 62will fail and no directory will be created if: 63.Bl -tag -width ENAMETOOLO 64.It Bq Er ENOTDIR 65A component of the path prefix is not a directory. 66.It Bq Er EINVAL 67The pathname contains a character with the high-order bit set. 68.It Bq Er ENAMETOOLONG 69A component of a pathname exceeded 255 characters, 70or an entire path name exceeded 1023 characters. 71.It Bq Er ENOENT 72A component of the path prefix does not exist. 73.It Bq Er EACCES 74Search permission is denied for a component of the path prefix. 75.It Bq Er ELOOP 76Too many symbolic links were encountered in translating the pathname. 77.It Bq Er EPERM 78The 79.Fa path 80argument contains a byte with the high-order bit set. 81.It Bq Er EROFS 82The named file resides on a read-only file system. 83.It Bq Er EEXIST 84The named file exists. 85.It Bq Er ENOSPC 86The directory in which the entry for the new directory is being placed 87cannot be extended because there is no space left on the file 88system containing the directory. 89.It Bq Er ENOSPC 90The new directory cannot be created because there 91there is no space left on the file 92system that will contain the directory. 93.It Bq Er ENOSPC 94There are no free inodes on the file system on which the 95directory is being created. 96.It Bq Er EDQUOT 97The directory in which the entry for the new directory 98is being placed cannot be extended because the 99user's quota of disk blocks on the file system 100containing the directory has been exhausted. 101.It Bq Er EDQUOT 102The new directory cannot be created because the user's 103quota of disk blocks on the file system that will 104contain the directory has been exhausted. 105.It Bq Er EDQUOT 106The user's quota of inodes on the file system on 107which the directory is being created has been exhausted. 108.It Bq Er EIO 109An I/O error occurred while making the directory entry or allocating the inode. 110.It Bq Er EIO 111An I/O error occurred while reading from or writing to the file system. 112.It Bq Er EFAULT 113.Fa Path 114points outside the process's allocated address space. 115.El 116.Sh SEE ALSO 117.Xr chmod 2 , 118.Xr stat 2 , 119.Xr umask 2 120.Sh STANDARDS 121.Fn Mkdir 122conforms to IEEE Std 1003.1-1988 123.Pq Dq Tn POSIX . 124