MKDIR(2) | System Calls Manual | MKDIR(2) |
mkdir
, mkdirat
— make a directory file
#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);
The directory path is created with the access permissions specified by mode and restricted by the umask(2) of the calling process.
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.
The
mkdirat
()
function is equivalent to
mkdir
()
except that where path specifies a relative path, the
newly created directory is created relative to the directory associated with
file descriptor fd instead of the current working
directory.
If
mkdirat
()
is passed the special value AT_FDCWD
(defined in
<fcntl.h>
) in the
fd parameter, the current working directory is used
and the behavior is identical to a call to
mkdir
().
Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error.
mkdir
() and
mkdirat
() will fail and no directory will be created
if:
ENOTDIR
]ENAMETOOLONG
]NAME_MAX
characters, or an entire pathname (including the terminating NUL) exceeded
PATH_MAX
bytes.ENOENT
]EACCES
]ELOOP
]EROFS
]EEXIST
]ENOSPC
]ENOSPC
]EDQUOT
]EDQUOT
]EIO
]EIO
]EFAULT
]Additionally, mkdirat
() will fail if:
EBADF
]AT_FDCWD
nor a valid file descriptor.ENOTDIR
]EACCES
]The mkdir
() and
mkdirat
() functions conform to IEEE
Std 1003.1-2008 (“POSIX.1”).
A mkdir
() system call first appeared in
Version 1 AT&T UNIX. It was renamed to
makdir
() in Version 2
AT&T UNIX. However, it did not exist from
Version 4 AT&T UNIX to
4.1BSD; in those releases,
mknod(2) had to be used. Since
mkdir
() reappeared in
4.1cBSD, it no longer requires superuser privileges
and it automatically creates the ‘.’ and ‘..’
directory entries.
The mkdirat
() system call has been
available since OpenBSD 5.0.
March 23, 2017 | OpenBSD-6.7 |