mkdir(2) mkdir(2)
NAME
mkdir - make a directory
SYNOPSIS
#include <sys/types.h>
#include <sys/stat.h>
int mkdir(const char *path, modet mode);
DESCRIPTION
mkdir creates a new directory named by the path name pointed to by
path. The mode of the new directory is initialized from mode [see
chmod(2) for values of mode]. The protection part of the mode
argument is modified by the process's file creation 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 the process's effective group ID,
or if the SISGID bit is set in the parent directory, then the group
ID of the directory is inherited from the parent. The SISGID bit of
the new directory is inherited from the parent directory.
If path is a symbolic link, it is not followed.
The newly created directory is empty with the exception of entries
for itself (.) and its parent directory (..).
Upon successful completion, mkdir marks for update the statime,
stctime and stmtime fields of the directory. Also, the stctime and
stmtime fields of the directory that contains the new entry are
marked for update.
mkdir fails and creates no directory if one or more of the following
are true:
EACCES Either a component of the path prefix denies
search permission or write permission is denied
on the parent directory of the directory to be
created.
EEXIST The named file already exists.
EFAULT path points outside the allocated address space
of the process.
EIO An I/O error has occurred while accessing the
file system.
ELOOP Too many symbolic links were encountered in
translating path.
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mkdir(2) mkdir(2)
EMLINK The maximum number of links to the parent
directory would be exceeded.
EMULTIHOP Components of path require hopping to multiple
remote machines and the file system type does not
allow it.
ENAMETOOLONG The length of the path argument exceeds
{PATHMAX}, or the length of a path component
exceeds {NAMEMAX} while POSIXNOTRUNC is in
effect.
ENOENT A component of the path prefix does not exist or
is a null pathname.
ENOLINK path points to a remote machine and the link to
that machine is no longer active.
ENOSPC No free space is available on the device
containing the directory.
ENOTDIR A component of the path prefix is not a
directory.
EROFS The path prefix resides on a read-only file
system.
DIAGNOSTICS
Upon successful completion, a value of 0 is returned. Otherwise, a
value of -1 is returned, and errno is set to indicate the error.
SEE ALSO
chmod(2), mknod(2), umask(2), stat(5).
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