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MKDIR(2)		   Linux Programmer's Manual		      MKDIR(2)

       mkdir - create a directory

       #include <sys/stat.h>
       #include <sys/types.h>

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

       mkdir() attempts to create a directory named pathname.

       The  argument mode specifies the permissions to use.  It is modified by
       the process's umask in the usual way: the permissions  of  the  created
       directory  are  (mode & ~umask & 0777).	Other mode bits of the created
       directory depend on the operating system.  For Linux, see 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 file system 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.

       mkdir() returns zero on success, or -1 if an error occurred  (in	 which
       case, errno is set appropriately).

       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's quota of disk blocks or inodes on the file system has
	      been exhausted.

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

       EFAULT pathname points outside your accessible address space.

       ELOOP  Too many symbolic links were encountered in resolving pathname.

       EMLINK The number  of  links  to	 the  parent  directory	 would	exceed

	      pathname was too long.

       ENOENT A	 directory  component  in pathname does not exist or is a dan‐
	      gling symbolic link.

       ENOMEM Insufficient kernel memory was available.

       ENOSPC The device containing pathname has no room for  the  new	direc‐

       ENOSPC The  new	directory  cannot  be  created because the user's disk
	      quota is exhausted.

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

       EPERM  The  file	 system	 containing pathname does not support the cre‐
	      ation of directories.

       EROFS  pathname refers to a file on a read-only file system.

       SVr4, BSD, POSIX.1-2001.

       Under Linux apart from the permission bits, only the S_ISVTX  mode  bit
       is  honored.   That is, under Linux the created directory actually gets
       mode (mode & ~umask & 01777).  See also stat(2).

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

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

       This page is part of release 3.53 of the Linux  man-pages  project.   A
       description  of	the project, and information about reporting bugs, can
       be found at

Linux				  2013-01-27			      MKDIR(2)

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