NAME
unlink - remove directory entry

SYNOPSIS
unlink(path)
const char *path;

DESCRIPTION
Unlink removes the entry for the file path from its directory. If
this entry was the last link to the file, and no process has the
file open, then all resources associated with the file are
reclaimed. If, however, the file was open in any process, the
actual resource reclamation is delayed until it is closed, even
though the directory entry has disappeared.

RETURN VALUE
Upon successful completion, a value of 0 is returned. Otherwise, a
value of -1 is returned and errno is set to indicate the error.

ERRORS
The unlink succeeds unless:

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

[EINVAL] The pathname contains a character with the high-
order bit set.

[ENAMETOOLONG] A component of a pathname exceeded 255 characters,
or an entire path name exceeded 1023 characters.

[ENOENT] The named file does not exist.

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

[EACCES] Write permission is denied on the directory
containing the link to be removed.

[ELOOP] Too many symbolic links were encountered in
translating the pathname.

[EPERM] The named file is a directory and the effective user
ID of the process is not the super-user.

[EPERM] The directory containing the file is marked sticky,
and neither the containing directory nor the file to
be removed are owned by the effective user ID.

[EBUSY] The entry to be unlinked is the mount point for a
mounted file system.

[EIO] An I/O error occurred while deleting the directory
entry or deallocating the inode.

[EROFS] The named file resides on a read-only file system.

[EFAULT] Path points outside the process’s allocated address
space.

SEE ALSO
close(2), link(2), rmdir(2)