<TITLE>rename</TITLE>
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<h3>RENAME(2) Linux Programmer's Manual RENAME(2)
</h3>
<h3>NAME
</h3> rename - change the name or location of a file
<h3>SYNOPSIS
</h3> #include <unistd.h>
int rename(const char *oldpath, const char *newpath);
<h3>DESCRIPTION
</h3> rename renames a file, moving it between directories if
required.
Any other hard links to the file (as created using link)
are unaffected.
If newpath already exists it will be atomically overwrit-
ten (subject to a few conditions - see ERRORS below), so
that there is no point at which another process attempting
to access newpath will find it missing.
If newpath exists but the operation fails for some reason
or the system crashes rename guarantees to leave an
instance of newpath in place.
However, when overwriting there will probably be a window
in which both oldpath and newpath refer to the file being
renamed.
If oldpath refers to a symbolic link the link is renamed;
if newpath refers to a symbolic link the link will be
overwritten.
<h3>RETURN VALUE
</h3> On success, zero is returned. On error, -1 is returned,
and errno is set appropriately.
<h3>ERRORS
</h3> EISDIR newpath is an existing directory, but oldpath is
not a directory.
EXDEV oldpath and newpath are not on the same filesys-
tem.
ENOTEMPTY
newpath is a non-empty directory.
EBUSY newpath exists and is the current working direc-
tory or root directory of some process.
EINVAL An attempt was made to make a directory a subdi-
rectory of itself.
EMLINK oldpath already has the maximum number of links to
it, or it was a directory and the directory
<h3>Linux 0.99.7 24 July 1993 1
</h3>
<h3>RENAME(2) Linux Programmer's Manual RENAME(2)
</h3>
containing newpath has the maximum number of
links.
ENOTDIR A component used as a directory in oldpath or new-
path is not, in fact, a directory.
EFAULT oldpath or newpath points outside your accessible
address space.
EACCES Write access to the directory containing oldpath
or newpath is not allowed for the process's effec-
tive uid, or one of the directories in oldpath or
newpath did not allow search (execute) permission,
or oldpath was a directory and did not allow write
permission (needed to update the .. entry).
EPERM The directory containing oldpath has the sticky
bit set and the process's effective uid is neither
the uid of the file to be deleted nor that of the
directory containing it, or the filesystem con-
taining pathname does not support renaming of the
type requested.
ENAMETOOLONG
oldpath or newpath was too long.
ENOENT A directory component in oldpath or newpath does
not exist or is a dangling symbolic link.
ENOMEM Insufficient kernel memory was available.
EROFS The file is on a read-only filesystem.
ELOOP oldpath or newpath contains a reference to a cir-
cular symbolic link, ie a symbolic link whose
expansion contains a reference to itself.
ENOSPC The device containing the file has no room for the
new directory entry.
<h3>CONFORMING TO
</h3> POSIX, BSD 4.3, ANSI C
<h3>BUGS
</h3> Currently (Linux 0.99pl7) most of the filesystems except
Minix will not allow any overwriting renames involving
directories. You get EEXIST if you try.
On NFS filesystems, you can not assume that only because
the operation failed, the file was not renamed. If the
server does the rename operation and then crashes, the
retransmitted RPC which will be processed when the server
is up again causes a failure. The application is expected
to deal with this. See link(2) for a similar problem.
<h3>Linux 0.99.7 24 July 1993 2
</h3>
<h3>RENAME(2) Linux Programmer's Manual RENAME(2)
</h3>
</pre>
<hr>
<h3>SEE ALSO
</h3><p>
<a href=link.htm>link</a>,
<a href=unlink.htm>unlink</a>,
<a href=symlink.htm>symlink</a>,
<pre>
<h3>Linux 0.99.7 24 July 1993 3
</h3>
</pre>
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