NAME

unmount − remove a file system

SYNOPSIS

unmount(name)
char ∗name;

DESCRIPTION

unmount announces to the system that the directory name is no longer to refer to the root of a mounted file system.  The directory name reverts to its ordinary interpretation. 

RETURN VALUE

unmount returns 0 if the action occurred; −1 if if the directory is inaccessible or does not have a mounted file system, or if there are active files in the mounted file system. 

ERRORS

unmount may fail with one of the following errors:

EPERM The caller is not the super-user. 

ENOTDIR A component of the path prefix of name is not a directory. 

EINVAL name is not the root of a mounted file system. 

EBUSY A process is holding a reference to a file located on the file system. 

EINVAL The path name contains a character with the high-order bit set. 

ENAMETOOLONG
The length of a component of the path name exceeds 255 characters, or the length of the entire path name exceeds 1023 characters.

ENOENT name does not exist. 

EACCES Search permission is denied for a component of the path prefix. 

EFAULT name points outside the process’s allocated address space. 

ELOOP Too many symbolic links were encountered in translating the path name. 

EIO An I/O error occurred while reading from or writing to the file system. 

SEE ALSO

mount(2), umount(2), mount(1M), umount(1M)

BUGS

The error codes are in a state of disarray; too many errors appear to the caller as one value. 

CX/UX Programmer’s Reference Manual