2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
162 lines
4.7 KiB
Groff
162 lines
4.7 KiB
Groff
.\" $NetBSD: link.2,v 1.24 2010/05/31 12:16:20 njoly Exp $
|
|
.\"
|
|
.\" Copyright (c) 1980, 1991, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)link.2 8.3 (Berkeley) 1/12/94
|
|
.\"
|
|
.Dd January 12, 1994
|
|
.Dt LINK 2
|
|
.Os
|
|
.Sh NAME
|
|
.Nm link
|
|
.Nd make a hard file link
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In unistd.h
|
|
.Ft int
|
|
.Fn link "const char *name1" "const char *name2"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn link
|
|
function call
|
|
atomically creates the specified directory entry (hard link)
|
|
.Fa name2
|
|
with the attributes of the underlying object pointed at by
|
|
.Fa name1 .
|
|
If the link is successful: the link count of the underlying object
|
|
is incremented;
|
|
.Fa name1
|
|
and
|
|
.Fa name2
|
|
share equal access and rights
|
|
to the
|
|
underlying object.
|
|
.Pp
|
|
If
|
|
.Fa name1
|
|
is removed, the file
|
|
.Fa name2
|
|
is not deleted and the link count of the
|
|
underlying object is
|
|
decremented.
|
|
.Pp
|
|
.Fa name1
|
|
must exist for the hard link to
|
|
succeed and
|
|
both
|
|
.Fa name1
|
|
and
|
|
.Fa name2
|
|
must be in the same file system.
|
|
.Fa name1
|
|
may not be a directory unless the caller is the super-user
|
|
and the file system containing it supports linking to directories.
|
|
.Sh RETURN VALUES
|
|
Upon successful completion, a value of 0 is returned.
|
|
Otherwise, a value of \-1 is returned and
|
|
.Va errno
|
|
is set to indicate the error.
|
|
.Sh ERRORS
|
|
.Fn link
|
|
will fail and no link will be created if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er ENOTDIR
|
|
A component of either path prefix is not a directory.
|
|
.It Bq Er ENAMETOOLONG
|
|
A component of a pathname exceeded
|
|
.Brq Dv NAME_MAX
|
|
characters, or an entire path name exceeded
|
|
.Brq Dv PATH_MAX
|
|
characters.
|
|
.It Bq Er ENOENT
|
|
A component of either path prefix does not exist.
|
|
.It Bq Er EACCES
|
|
A component of either path prefix denies search permission, or
|
|
the requested link requires writing in a directory with a mode
|
|
that denies write permission.
|
|
.It Bq Er ELOOP
|
|
Too many symbolic links were encountered in translating one of the pathnames.
|
|
.It Bq Er ENOENT
|
|
The file named by
|
|
.Fa name1
|
|
does not exist.
|
|
.It Bq Er EOPNOTSUPP
|
|
The file system containing the file named by
|
|
.Fa name1
|
|
does not support links.
|
|
.It Bq Er EMLINK
|
|
The link count of the file named by
|
|
.Fa name1
|
|
would exceed
|
|
.Dv {LINK_MAX} .
|
|
.It Bq Er EEXIST
|
|
The link named by
|
|
.Fa name2
|
|
does exist.
|
|
.It Bq Er EPERM
|
|
The file named by
|
|
.Fa name1
|
|
is a directory and the effective
|
|
user ID is not super-user,
|
|
or the file system containing the file does not permit the use of
|
|
.Fn link
|
|
on a directory.
|
|
.It Bq Er EXDEV
|
|
The link named by
|
|
.Fa name2
|
|
and the file named by
|
|
.Fa name1
|
|
are on different file systems.
|
|
.It Bq Er ENOSPC
|
|
The directory in which the entry for the new link is being placed
|
|
cannot be extended because there is no space left on the file
|
|
system containing the directory.
|
|
.It Bq Er 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 on the file system
|
|
containing the directory has been exhausted.
|
|
.It Bq Er EIO
|
|
An I/O error occurred while reading from or writing to
|
|
the file system to make the directory entry.
|
|
.It Bq Er EROFS
|
|
The requested link requires writing in a directory on a read-only file
|
|
system.
|
|
.It Bq Er EFAULT
|
|
One of the pathnames specified
|
|
is outside the process's allocated address space.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr symlink 2 ,
|
|
.Xr unlink 2
|
|
.Sh STANDARDS
|
|
The
|
|
.Fn link
|
|
function conforms to
|
|
.St -p1003.1-90 .
|