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);
#include <sys/stat.h>
#include <fcntl.h>
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.
mkdirat() works the same way as
mkdir()
except if
path is relative. In that case, it is looked
up from a directory whose file descriptor was passed as
fd. Search permission is required this directory.
fd can be set to
AT_FDCWD
in
order to specify the current directory.
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.
RETURN VALUES
The
mkdir() and
mkdirat() functions return
the value 0 if successful; otherwise the value -1 is returned and
the global variable
errno is set to indicate the error.
ERRORS
Both
mkdir() and
mkdirat() will fail and no
directory will be created if:
-
-
- [
EACCES
]
- Search permission is denied for a component of the path
prefix.
-
-
- [
EDQUOT
]
- The new directory cannot be created because the user's
quota of disk blocks on the file system that will contain the directory
has been exhausted. Or, the user's quota of inodes on the file system on
which the directory is being created has been exhausted.
-
-
- [
EEXIST
]
- The named file exists.
-
-
- [
EFAULT
]
- path points outside the process's
allocated address space.
-
-
- [
EIO
]
- An I/O error occurred while making the directory entry or
allocating the inode; or an I/O error occurred while reading from or
writing to the file system.
-
-
- [
ELOOP
]
- Too many symbolic links were encountered in translating the
pathname.
-
-
- [
ENAMETOOLONG
]
- A component of a pathname exceeded
{
NAME_MAX
} characters, or an entire path name
exceeded {PATH_MAX
} characters.
-
-
- [
ENOENT
]
- A component of the path prefix does not exist.
-
-
- [
ENOSPC
]
- The new directory cannot be created because there is no
space left on the file system that will contain the directory. Or, there
are no free inodes on the file system on which the directory is being
created.
-
-
- [
ENOTDIR
]
- A component of the path prefix is not a directory.
-
-
- [
EROFS
]
- The named file resides on a read-only file system.
In addition,
mkdirat() will fail if:
-
-
- [
EBADF
]
- path does not specify an absolute
path and fd is neither
AT_FDCWD
nor a valid file descriptor open for
reading or searching.
-
-
- [
ENOTDIR
]
- path is not an absolute path and
fd is a file descriptor associated with a
non-directory file.
SEE ALSO
chmod(2),
stat(2),
umask(2)
STANDARDS
The
mkdir() function conforms to
IEEE Std
1003.1-1990 (“POSIX.1”).
mkdirat()
conforms to
IEEE Std 1003.1-2008
(“POSIX.1”).