mkdir(2) — System Calls
OSF
NAME
mkdir − Creates a directory
SYNOPSIS
#include <sys/stat.h> #include <sys/types.h> int mkdir (
const char ∗path,
mode_t mode );
PARAMETERS
pathSpecifies the name of the new directory. If NFS is installed on your system, this path can cross into another node. In this case, the new directory is created at that node. If the final component of the path parameter refers to a symbolic link, the link is traversed and pathname resolution continues.
modeSpecifies the mask for the read, write, and execute (RWX) flags for owner, group, and others.
DESCRIPTION
The mkdir() function creates a new directory with the following attributes:
•The owner ID is set to the process’s effective user ID.
•The group ID is set to the group ID of its parent directory.
•Permission and attribute bits are set according to the value of the mode parameter modified by the process’s file creation mask (see the umask() function). This parameter is constructed by logically ORing values described in the sys/stat.h header file.
•The new directory is empty, except for . (dot) and .. (dot-dot).
To execute the mkdir() function, a process must have search permission to get to the parent directory of the path parameter and write permission in the parent directory of the path parameter with respect to all of the system’s configured access control policies.
Upon successful completion, the mkdir() function marks the st_atime, st_ctime, and st_mtime fields of the directory for update, and marks the st_ctime and st_mtime fields of the new directory’s parent directory for update.
NOTES
AES Support Level:
Full use
RETURN VALUES
Upon successful completion, the mkdir() function returns a value of 0 (zero). If the mkdir() function fails, a value of -1 is returned, and errno is set to indicate the error.
ERRORS
If the mkdir() function fails, the directory is not created and errno may be set to one of the following values:
[EACCES]Creating the requested directory requires writing in a directory with a mode that denies write permission, or search permission is denied on the parent directory of the directory to be created.
[EEXIST]The named file already exists.
[EMLINK]The link count of the parent directory would exceed LINK_MAX.
[ELOOP]Too many links were encountered in translating path.
[EFAULT]The path parameter is an invalid address.
[ENAMETOOLONG]
The length of the path parameter exceeds PATH_MAX or a pathname component is longer than NAME_MAX.
[ENOENT]A component of the path parameter does not exist or points to an empty string.
[EROFS]The named file resides on a read-only file system.
[ENOSPC]The file system does not contain enough space to hold the contents of the new directory or to extend the parent directory of the new directory.
[EDQUOT]The directory in which the entry for the new link is being placed cannot be extended because the user’s quota of disk blocks or i-nodes on the file system containing the directory is exhausted.
[ENOTDIR]A component of the path prefix is not a directory.