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Section (1) mkdir

Linux manual pages Section 1  

Name

mkdir — make directories

Synopsis

mkdir [OPTION...] DIRECTORY...

DESCRIPTION

Create the DIRECTORY(ies), if they do not already exist.

Mandatory arguments to long options are mandatory for short options too.

−m, −−mode=MODE/

set file mode (as in chmod), not a=rwx − umask

−p, −−parents

no error if existing, make parent directories as needed

−v, −−verbose

print a message for each created directory

−Z

set SELinux security context of each created directory to the default type

−−context[=CTX/]

like −Z, or if CTX is specified then set the SELinux or SMACK security context to CTX

−−help

display this help and exit

−−version

output version information and exit

AUTHOR

Written by David MacKenzie.

REPORTING BUGS

GNU coreutils online help: <https://www.gnu.org/software/coreutils/>

Report any translation bugs to <https://translationproject.org/team/>

SEE ALSO

mkdir(2)

Full documentation <https://www.gnu.org/software/coreutils/mkdir>

or available locally via: info _zsingle_quotesz_(coreutils) mkdir invocation_zsingle_quotesz_

COPYRIGHT

Copyright © 2019 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.

This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

Section (2) mkdir

Linux manual pages Section 2  

Name

mkdir, mkdirat — create a directory

Synopsis

#include <sys/stat.h>
#include <sys/types.h>
int mkdir( const char *pathname,
  mode_t mode);
  
#include <fcntl.h>            /* Definition of AT_* constants */
#include <sys/stat.h>
int mkdirat( int dirfd,
  const char *pathname,
  mode_t mode);
 
[Note] Note
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
mkdirat():
Since glibc 2.10:
_POSIX_C_SOURCE >= 200809L
Before glibc 2.10:
_ATFILE_SOURCE

DESCRIPTION

mkdir() attempts to create a directory named pathname.

The argument mode specifies the mode for the new directory (see inode(7)). It is modified by the process_zsingle_quotesz_s umask in the usual way: in the absence of a default ACL, the mode of the created directory is (mode & ~umask & 0777). Whether other mode bits are honored for the created directory depends on the operating system. For Linux, see NOTES below.

The newly created directory will be owned by the effective user ID of the process. If the directory containing the file has the set-group-ID bit set, or if the filesystem is mounted with BSD group semantics (mount -o bsdgroups or, synonymously mount -o grpid), the new directory will inherit the group ownership from its parent; otherwise it will be owned by the effective group ID of the process.

If the parent directory has the set-group-ID bit set, then so will the newly created directory.

mkdirat()

The mkdirat() system call operates in exactly the same way as mkdir(), except for the differences described here.

If the pathname given in pathname is relative, then it is interpreted relative to the directory referred to by the file descriptor dirfd (rather than relative to the current working directory of the calling process, as is done by mkdir() for a relative pathname).

If pathname is relative and dirfd is the special value AT_FDCWD, then pathname is interpreted relative to the current working directory of the calling process (like mkdir()).

If pathname is absolute, then dirfd is ignored.

See openat(2) for an explanation of the need for mkdirat().

RETURN VALUE

mkdir() and mkdirat() return zero on success, or −1 if an error occurred (in which case, errno is set appropriately).

ERRORS

EACCES

The parent directory does not allow write permission to the process, or one of the directories in pathname did not allow search permission. (See also path_resolution(7).)

EDQUOT

The user_zsingle_quotesz_s quota of disk blocks or inodes on the filesystem has been exhausted.

EEXIST

pathname already exists (not necessarily as a directory). This includes the case where pathname is a symbolic link, dangling or not.

EFAULT

pathname points outside your accessible address space.

EINVAL

The final component (basename) of the new directory_zsingle_quotesz_s pathname is invalid (e.g., it contains characters not permitted by the underlying filesystem).

ELOOP

Too many symbolic links were encountered in resolving pathname.

EMLINK

The number of links to the parent directory would exceed LINK_MAX.

ENAMETOOLONG

pathname was too long.

ENOENT

A directory component in pathname does not exist or is a dangling symbolic link.

ENOMEM

Insufficient kernel memory was available.

ENOSPC

The device containing pathname has no room for the new directory.

ENOSPC

The new directory cannot be created because the user_zsingle_quotesz_s disk quota is exhausted.

ENOTDIR

A component used as a directory in pathname is not, in fact, a directory.

EPERM

The filesystem containing pathname does not support the creation of directories.

EROFS

pathname refers to a file on a read-only filesystem.

The following additional errors can occur for mkdirat():

EBADF

dirfd is not a valid file descriptor.

ENOTDIR

pathname is relative and dirfd is a file descriptor referring to a file other than a directory.

VERSIONS

mkdirat() was added to Linux in kernel 2.6.16; library support was added to glibc in version 2.4.

CONFORMING TO

mkdir(): SVr4, BSD, POSIX.1-2001, POSIX.1-2008.

mkdirat(): POSIX.1-2008.

NOTES

Under Linux, apart from the permission bits, the S_ISVTX mode bit is also honored.

There are many infelicities in the protocol underlying NFS. Some of these affect mkdir().

Glibc notes

On older kernels where mkdirat() is unavailable, the glibc wrapper function falls back to the use of mkdir(). When pathname is a relative pathname, glibc constructs a pathname based on the symbolic link in /proc/self/fd that corresponds to the dirfd argument.

SEE ALSO

mkdir(1), chmod(2), chown(2), mknod(2), mount(2), rmdir(2), stat(2), umask(2), unlink(2), acl(5) path_resolution(7)

COLOPHON

This page is part of release 4.16 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man−pages/.


  This manpage is Copyright (C) 1992 Drew Eckhardt;
            and Copyright (C) 1993 Michael Haardt
            and Copyright (C) 1993,1994 Ian Jackson
and Copyright (C) 2006, 2014 Michael Kerrisk

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