309 lines
7.6 KiB
Groff
309 lines
7.6 KiB
Groff
.\" Copyright (c) 1983, 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.
|
|
.\" 4. 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.
|
|
.\"
|
|
.\" @(#)rename.2 8.1 (Berkeley) 6/4/93
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd April 10, 2008
|
|
.Dt RENAME 2
|
|
.Os
|
|
.Sh NAME
|
|
.Nm rename
|
|
.Nd change the name of a file
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In stdio.h
|
|
.Ft int
|
|
.Fn rename "const char *from" "const char *to"
|
|
.Ft int
|
|
.Fn renameat "int fromfd" "const char *from" "int tofd" "const char *to"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn rename
|
|
system call
|
|
causes the link named
|
|
.Fa from
|
|
to be renamed as
|
|
.Fa to .
|
|
If
|
|
.Fa to
|
|
exists, it is first removed.
|
|
Both
|
|
.Fa from
|
|
and
|
|
.Fa to
|
|
must be of the same type (that is, both directories or both
|
|
non-directories), and must reside on the same file system.
|
|
.Pp
|
|
The
|
|
.Fn rename
|
|
system call
|
|
guarantees that if
|
|
.Fa to
|
|
already exists, an instance of
|
|
.Fa to
|
|
will always exist, even if the system should crash in
|
|
the middle of the operation.
|
|
.Pp
|
|
If the final component of
|
|
.Fa from
|
|
is a symbolic link,
|
|
the symbolic link is renamed,
|
|
not the file or directory to which it points.
|
|
.Pp
|
|
The
|
|
.Fn renameat
|
|
system call is equivalent to
|
|
.Fn rename
|
|
except in the case where either
|
|
.Fa from
|
|
or
|
|
.Fa to
|
|
specifies a relative path.
|
|
If
|
|
.Fa from
|
|
is a relative path, the file to be renamed is located
|
|
relative to the directory associated with the file descriptor
|
|
.Fa fromfd
|
|
instead of the current working directory.
|
|
If the
|
|
.Fa to
|
|
is a relative path, the same happens only relative to the directory associated
|
|
with
|
|
.Fa tofd .
|
|
If the
|
|
.Fn renameat
|
|
is passed the special value
|
|
.Dv AT_FDCWD
|
|
in the
|
|
.Fa fromfd
|
|
or
|
|
.Fa tofd
|
|
parameter, the current working directory is used in the determination
|
|
of the file for the respective path parameter.
|
|
.\".Sh CAVEAT
|
|
.\"The system can deadlock if a loop in the file system graph is present.
|
|
.\"This loop takes the form of an entry in directory
|
|
.\".Pa a ,
|
|
.\"say
|
|
.\".Pa a/foo ,
|
|
.\"being a hard link to directory
|
|
.\".Pa b ,
|
|
.\"and an entry in
|
|
.\"directory
|
|
.\".Pa b ,
|
|
.\"say
|
|
.\".Pa b/bar ,
|
|
.\"being a hard link
|
|
.\"to directory
|
|
.\".Pa a .
|
|
.\"When such a loop exists and two separate processes attempt to
|
|
.\"perform
|
|
.\".Ql rename a/foo b/bar
|
|
.\"and
|
|
.\".Ql rename b/bar a/foo ,
|
|
.\"respectively,
|
|
.\"the system may deadlock attempting to lock
|
|
.\"both directories for modification.
|
|
.\"Hard links to directories should be
|
|
.\"replaced by symbolic links by the system administrator.
|
|
.Sh RETURN VALUES
|
|
.Rv -std rename
|
|
.Sh ERRORS
|
|
The
|
|
.Fn rename
|
|
system call
|
|
will fail and neither of the argument files will be
|
|
affected if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er ENAMETOOLONG
|
|
A component of either pathname exceeded 255 characters,
|
|
or the entire length of either path name exceeded 1023 characters.
|
|
.It Bq Er ENOENT
|
|
A component of the
|
|
.Fa from
|
|
path does not exist,
|
|
or a path prefix of
|
|
.Fa to
|
|
does not exist.
|
|
.It Bq Er EACCES
|
|
A component of either path prefix denies search permission.
|
|
.It Bq Er EACCES
|
|
The requested link requires writing in a directory with a mode
|
|
that denies write permission.
|
|
.It Bq Er EACCES
|
|
The directory pointed at by the
|
|
.Fa from
|
|
argument denies write permission, and the operation would move
|
|
it to another parent directory.
|
|
.It Bq Er EPERM
|
|
The file pointed at by the
|
|
.Fa from
|
|
argument has its immutable, undeletable or append-only flag set, see the
|
|
.Xr chflags 2
|
|
manual page for more information.
|
|
.It Bq Er EPERM
|
|
The parent directory of the file pointed at by the
|
|
.Fa from
|
|
argument has its immutable or append-only flag set.
|
|
.It Bq Er EPERM
|
|
The parent directory of the file pointed at by the
|
|
.Fa to
|
|
argument has its immutable flag set.
|
|
.It Bq Er EPERM
|
|
The directory containing
|
|
.Fa from
|
|
is marked sticky,
|
|
and neither the containing directory nor
|
|
.Fa from
|
|
are owned by the effective user ID.
|
|
.It Bq Er EPERM
|
|
The file pointed at by the
|
|
.Fa to
|
|
argument
|
|
exists,
|
|
the directory containing
|
|
.Fa to
|
|
is marked sticky,
|
|
and neither the containing directory nor
|
|
.Fa to
|
|
are owned by the effective user ID.
|
|
.It Bq Er ELOOP
|
|
Too many symbolic links were encountered in translating either pathname.
|
|
.It Bq Er ENOTDIR
|
|
A component of either path prefix is not a directory.
|
|
.It Bq Er ENOTDIR
|
|
The
|
|
.Fa from
|
|
argument
|
|
is a directory, but
|
|
.Fa to
|
|
is not a directory.
|
|
.It Bq Er EISDIR
|
|
The
|
|
.Fa to
|
|
argument
|
|
is a directory, but
|
|
.Fa from
|
|
is not a directory.
|
|
.It Bq Er EXDEV
|
|
The link named by
|
|
.Fa to
|
|
and the file named by
|
|
.Fa from
|
|
are on different logical devices (file systems).
|
|
Note that this error
|
|
code will not be returned if the implementation permits cross-device
|
|
links.
|
|
.It Bq Er ENOSPC
|
|
The directory in which the entry for the new name 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 name
|
|
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 making or updating a directory entry.
|
|
.It Bq Er EROFS
|
|
The requested link requires writing in a directory on a read-only file
|
|
system.
|
|
.It Bq Er EFAULT
|
|
Path
|
|
points outside the process's allocated address space.
|
|
.It Bq Er EINVAL
|
|
The
|
|
.Fa from
|
|
argument
|
|
is a parent directory of
|
|
.Fa to ,
|
|
or an attempt is made to rename
|
|
.Ql .\&
|
|
or
|
|
.Ql \&.. .
|
|
.It Bq Er ENOTEMPTY
|
|
The
|
|
.Fa to
|
|
argument
|
|
is a directory and is not empty.
|
|
.El
|
|
.Pp
|
|
In addition to the errors returned by the
|
|
.Fn rename ,
|
|
the
|
|
.Fn renameat
|
|
may fail if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EBADF
|
|
The
|
|
.Fa from
|
|
argument does not specify an absolute path and the
|
|
.Fa fromfd
|
|
argument is neither
|
|
.Dv AT_FDCWD
|
|
nor a valid file descriptor open for searching, or the
|
|
.Fa to
|
|
argument does not specify an absolute path and the
|
|
.Fa tofd
|
|
argument is neither
|
|
.Dv AT_FDCWD
|
|
nor a valid file descriptor open for searching.
|
|
.It Bq Er ENOTDIR
|
|
The
|
|
.Fa from
|
|
argument is not an absolute path and
|
|
.Fa fromfd
|
|
is neither
|
|
.Dv AT_FDCWD
|
|
nor a file descriptor associated with a directory, or the
|
|
.Fa to
|
|
argument is not an absolute path and
|
|
.Fa tofd
|
|
is neither
|
|
.Dv AT_FDCWD
|
|
nor a file descriptor associated with a directory.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr chflags 2 ,
|
|
.Xr open 2 ,
|
|
.Xr symlink 7
|
|
.Sh STANDARDS
|
|
The
|
|
.Fn rename
|
|
system call is expected to conform to
|
|
.St -p1003.1-96 .
|
|
The
|
|
.Fn renameat
|
|
system call follows The Open Group Extended API Set 2 specification.
|
|
.Sh HISTORY
|
|
The
|
|
.Fn renameat
|
|
system call appeared in
|
|
.Fx 8.0 .
|