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MKDIR(2)		  FreeBSD System Calls Manual		      MKDIR(2)

NAME
     mkdir, mkdirat -- make a directory	file

LIBRARY
     Standard C	Library	(libc, -lc)

SYNOPSIS
     #include <sys/stat.h>

     int
     mkdir(const char *path, mode_t mode);

     int
     mkdirat(int fd, const char	*path, mode_t mode);

DESCRIPTION
     The directory path	is created with	the access permissions specified by
     mode and restricted by the	umask(2) of the	calling	process.

     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 mkdirat() system call is equivalent to	mkdir()	except in the case
     where path	specifies a relative path.  In this case the newly created
     directory is created relative to the directory associated with the	file
     descriptor	fd instead of the current working directory.  If mkdirat() is
     passed the	special	value AT_FDCWD in the fd parameter, the	current	work-
     ing directory is used and the behavior is identical to a call to mkdir().

RETURN VALUES
     The mkdir() function returns the value 0 if successful; otherwise the
     value -1 is returned and the global variable errno	is set to indicate the
     error.

ERRORS
     The mkdir() system	call will fail and no directory	will be	created	if:

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

     [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, or	write permission is denied on the par-
			ent directory of the directory to be created.

     [ELOOP]		Too many symbolic links	were encountered in translat-
			ing the	pathname.

     [EPERM]		The parent directory of	the directory to be created
			has its	immutable flag set, see	the chflags(2) manual
			page for more information.

     [EROFS]		The named directory would reside on a read-only	file
			system.

     [EMLINK]		The new	directory cannot be created because the	parent
			directory contains too many subdirectories.

     [EEXIST]		The named file exists.

     [ENOSPC]		The new	directory cannot be created because 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 new	directory cannot be created because the	user's
			quota of disk blocks on	the file system	that will con-
			tain 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]		The path argument points outside the process's allo-
			cated address space.

     In	addition to the	errors returned	by the mkdir(),	the mkdirat() may fail
     if:

     [EBADF]		The path argument does not specify an absolute path
			and the	fd argument is neither AT_FDCWD	nor a valid
			file descriptor	open for searching.

     [ENOTDIR]		The path argument is not an absolute path and fd is
			neither	AT_FDCWD nor a file descriptor associated with
			a directory.

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

STANDARDS
     The mkdir() system	call is	expected to conform to ISO/IEC 9945-1:1990
     (``POSIX.1'').  The mkdirat() system call follows The Open	Group Extended
     API Set 2 specification.

HISTORY
     The mkdirat() system call appeared	in FreeBSD 8.0.

FreeBSD	9.2			 June 26, 2008			   FreeBSD 9.2

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | STANDARDS | HISTORY

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