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BSD 2.11 - man page for mkdir (bsd section 2)

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MKDIR(2)										 MKDIR(2)

NAME
       mkdir - make a directory file

SYNOPSIS
       mkdir(path, mode)
       char *path;
       int mode;

DESCRIPTION
       Mkdir  creates  a new directory file with name path.  The mode of the new file is initial-
       ized from mode.	(The protection part of the mode is modified by the process's mode  mask;
       see umask(2)).

       The directory's owner ID is set to the process's effective user ID.  The directory's group
       ID is set to that of the parent directory in which it is created.

       The low-order 9 bits of mode are modified by the process's file mode  creation  mask:  all
       bits set in the process's file mode creation mask are cleared.  See umask(2).

RETURN VALUE
       A  0  return  value indicates success.  A -1 return value indicates an error, and an error
       code is stored in errno.

ERRORS
       Mkdir will fail and no directory will be 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 path argument contains a byte with the high-order bit set.

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

       [EEXIST]       The named file exists.

       [ENOSPC]       The directory in which the entry for the new directory is being placed can-
		      not be extended because there is no space left on the file system  contain-
		      ing the directory.

       [ENOSPC]       The new directory cannot be created because there there is no space left on
		      the file system that will contain the directory.

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

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

       [EDQUOT]       The new directory cannot be created because the user's quota of disk blocks
		      on the file system that will contain the directory has been exhausted.

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

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

       [EIO]	      An I/O error occurred while reading from or writing to the file system.

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

SEE ALSO
       chmod(2), stat(2), umask(2)

4.2 Berkeley Distribution		 August 26, 1985				 MKDIR(2)
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