1 .\" Hey Emacs! This file is -*- nroff -*- source.
3 .\" This manpage is Copyright (C) 1992 Drew Eckhardt;
4 .\" 1993 Michael Haardt
5 .\" 1993,1994 Ian Jackson.
6 .\" You may distribute it under the terms of the GNU General
7 .\" Public License. It comes with NO WARRANTY.
9 .TH MKDIR 2 2008-05-13 "Linux" "Linux Programmer's Manual"
11 mkdir \- create a directory
14 .B #include <sys/stat.h>
15 .B #include <sys/types.h>
16 .\" .B #include <unistd.h>
18 .BI "int mkdir(const char *" pathname ", mode_t " mode );
22 attempts to create a directory named
27 specifies the permissions to use.
28 It is modified by the process's
30 in the usual way: the permissions of the created directory are
31 .RI ( mode " & ~" umask " & 0777)."
32 Other mode bits of the created directory depend on the operating system.
35 The newly created directory will be owned by the effective user ID of the
37 If the directory containing the file has the set-group-ID
38 bit set, or if the file system is mounted with BSD group semantics
39 .RI ( "mount -o bsdgroups"
41 .IR "mount -o grpid" ),
42 the new directory will inherit the group ownership from its parent;
43 otherwise it will be owned by the effective group ID of the process.
45 If the parent directory has the set-group-ID bit set then so will the
46 newly created directory.
49 returns zero on success, or \-1 if an error occurred (in which case,
51 is set appropriately).
55 The parent directory does not allow write permission to the process,
56 or one of the directories in
58 did not allow search permission.
60 .BR path_resolution (7).)
64 already exists (not necessarily as a directory).
65 This includes the case where
67 is a symbolic link, dangling or not.
70 .IR pathname " points outside your accessible address space."
73 Too many symbolic links were encountered in resolving
77 .IR pathname " was too long."
80 A directory component in
82 does not exist or is a dangling symbolic link.
85 Insufficient kernel memory was available.
90 has no room for the new directory.
93 The new directory cannot be created because the user's disk quota is
97 A component used as a directory in
99 is not, in fact, a directory.
102 The file system containing
104 does not support the creation of directories.
108 refers to a file on a read-only file system.
110 SVr4, BSD, POSIX.1-2001.
111 .\" SVr4 documents additional EIO, EMULTIHOP
113 Under Linux apart from the permission bits, only the
116 That is, under Linux the created directory actually gets mode
117 .RI ( mode " & ~" umask " & 01777)."
121 There are many infelicities in the protocol underlying NFS.
135 .BR path_resolution (7)