UNLINK(S) XENIX System V UNLINK(S)
Name
unlink - Removes directory entry.
Syntax
int unlink (path)
char *path;
Description
unlink removes the directory entry named by the pathname
pointed to by path.
The named file is unlinked unless one or more of the
following are true:
A component of the path prefix is not a directory.
[ENOTDIR]
The named file does not exist. [ENOENT]
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. [EACCES]
The named file is a directory and the effective user ID
of the process is not super-user. [EPERM]
The entry to be unlinked is the mount point for a
mounted file system. [EBUSY]
The entry to be unlinked is ``.'' or ``..'' in the root
directory of a mounted filesystem. [EBUSY]
The entry to be unlinked is the last link to a pure
procedure (shared text) file that is being executed.
[ETXTBSY]
The directory entry to be unlinked is part of a read-
only file system. [EROFS]
path points outside the process' allocated address
space. [EFAULT]
When all links to a file have been removed and no process
has the file open, the space occupied by the file is freed
and the file ceases to exist. If one or more processes have
the file open when the last link is removed, the removal is
postponed until all references to the file have been closed.
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UNLINK(S) XENIX System V UNLINK(S)
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.
See Also
rm(C), close(S), link(S), open(S)
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