|MKDIR(2)||System Calls Manual||MKDIR(2)|
— make a directory file
char *path, mode_t
fd, const char
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.
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.
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
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.
mkdirat() will fail and no directory will be created
NAME_MAXcharacters, or an entire pathname (including the terminating NUL) exceeded
mkdirat() will fail if:
AT_FDCWDnor a valid file descriptor.
mkdirat() functions conform to IEEE
Std 1003.1-2008 (“POSIX.1”).
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 ‘..’
mkdirat() system call has been
available since OpenBSD 5.0.
|March 23, 2017||OpenBSD-current|