MKDIR(2)MKDIR(2)NAMEmkdir - make a directory
SYNOPSIS
#include <sys/types.h>
#include <sys/stat.h>
int mkdir(const char *path, mode_t mode);
DESCRIPTION
The mkdir function creates a new, empty directory with name path. The
mode of the new directory is initialized from the mode argument. The
low-order nine bits of mode are modified by the process's file mode
creation mask: all bits set in the process's file mode creation mask
are cleared. See umask(2).
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 the directory is created.
Upon successful completion, the mkdir function marks for update the
st_atime, st_ctime and st_mtime fields of the directory, and the
st_ctime and st_mtime fields of the parent directory in which the new
directory is created.
RETURN VALUE
Upon successful completion, the mkdir function returns a value of zero.
Otherwise, a value of -1 is returned and errno is set to indicate the
error.
ERRORS
If any of the following conditions occurs, the mkdir function returns
-1 and set errno to the corresponding value:
[EACCES] Search permission is denied for a component of the path
prefix, or write permission is denied on the parent
directory in which the new directory is to be created.
[EDQUOT] The directory in which the entry for the new directory
is being placed cannot be extended because the user's
quota of disk blocks on the file system containing the
directory has been exhausted; or, the user's quota of
disk blocks on the file system that will hold the
contents of the new 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] The path argument points outside the process's allocated
address space.
[EINVAL] The pathname contains a character with the high-order
bit set.
[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.
[EMLINK] The link count of the parent directory in which the new
directory to be created would exceed {LINK_MAX} (see
<limits.h>) (POSIX only).
[ENAMETOOLONG] A component of path exceeds 255 characters, or the
entire pathname exceeds 1023 characters. For POSIX
applications these values are given by the constants
{NAME_MAX} and {PATH_MAX}, respectively.
[ENOENT] A component of the path prefix does not exist, or the
path argument points to an empty string.
[ENOSPC] The directory in which the entry for the new directory
is being placed cannot be extended because there is no
space left on the file system containing the directory;
or, there is no space left on the file system to hold
the contents of the new directory; or, there are no free
inodes on the file system on which the directory or the
contents of the new directory are being created.
[ENOTDIR] A component of the path prefix is not a directory.
[EPERM] The path argument contains a byte with the high-order
bit set.
[EROFS] The parent directory of the new directory being created
resides in a read-only file system.
SEE ALSOchmod(2), stat(2) or stat(2P), umask(2)4.2 Berkeley Distribution August 1, 1992 MKDIR(2)
