make a directory file
Standard C Library (libc, -lc)
, const char
The directory path
is created with the access
permissions specified by mode
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
() system call is equivalent to
() except in the case where
specifies a relative path. In this case
the newly created directory is created relative to the directory associated
with the file descriptor fd
instead of the
current working directory. If
passed the special value
parameter, the current working directory
is used and the behavior is identical to a call to
() function returns the
value 0 if successful; otherwise the value -1 is returned and
the global variable errno
is set to indicate
() system call will fail and no
directory will be created if:
- A component of the path prefix is not a directory.
- A component of a pathname exceeded 255 characters, or an entire path name
exceeded 1023 characters.
- A component of the path prefix does not exist.
- Search permission is denied for a component of the path prefix, or write
permission is denied on the parent directory of the directory to be
- Too many symbolic links were encountered in translating the pathname.
- The parent directory of the directory to be created has its immutable flag
set, see the
manual page for more information.
- The named directory would reside on a read-only file system.
- The new directory cannot be created because the parent directory contains
too many subdirectories.
- The named file exists.
- The new directory cannot be created because there is no space left on the
file system that will contain the directory.
- There are no free inodes on the file system on which the directory is
- 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
- The user's quota of inodes on the file system on which the directory is
being created has been exhausted.
- An I/O error occurred while making the directory entry or allocating the
- An I/O error occurred while reading from or writing to the file
- The path argument points outside the
process's allocated address space.
In addition to the errors returned by the
() may fail if:
- The path argument does not specify an
absolute path and the fd argument is
AT_FDCWD nor a valid file
descriptor open for searching.
- The path argument is not an absolute path
and fd is neither
AT_FDCWD nor a file descriptor
associated with a directory.
() system call is expected to
conform to IEEE Std 1003.1-1990
() system call follows The Open
Group Extended API Set 2 specification.
() system call appeared in
() system call appeared in
Version 1 AT&T UNIX