rename - 更改文件名稱或位置

內容簡介

#include <stdio.h>

int rename(const char **oldpath*, const char **newpath*);

描述

rename () 重命名文件，如果需要在目錄之間移動它。

Any other hard links to the file (as created using link(2)) are unaffected.

If newpath already exists it will be atomically replaced (subject to a few conditions; see ERRORS below), so that there is no yiibai at which another process attempting to accessnewpath will find it missing.

If newpath exists but the operation fails for some reason rename() guarantees to leave an instance of newpath in place.

However, when overwriting there will probably be a window in which both oldpath andnewpath 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.

返回值

On success, zero is returned. On error, -1 is returned, and  errno  is set appropriately.

錯誤

標籤

描述

EACCES

Write permission is denied for the directory containing oldpath ornewpath, or, search permission is denied for one of the directories in the path prefix of oldpath or newpath, or oldpath is a directory and does not allow write permission (needed to update the .. entry). (See also path_resolution(2).)

EBUSY

The rename fails because oldpath or newpath is a directory that is in use by some process (perhaps as current working directory, or as root directory, or because it was open for reading) or is in use by the system (for example as mount yiibai), while the system considers this an error. (Note that there is no requirement to return EBUSY in such cases — there is nothing wrong with doing the rename anyway — but it is allowed to return EBUSY if the system cannot otherwise handle such situations.)

EFAULT

oldpath or newpath yiibais outside your accessible address space.

EINVAL

The new pathname contained a path prefix of the old, or, more generally, an attempt was made to make a directory a subdirectory of itself.

EISDIR

newpath is an existing directory, but oldpath is not a directory.

ELOOP

Too many symbolic links were encountered in resolving oldpathor newpath.

EMLINK

oldpath already has the maximum number of links to it, or it was a directory and the directory containing newpath has the maximum number of links.

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.

ENOSPC

The device containing the file has no room for the new directory entry.

ENOTDIR

 

A component used as a directory in oldpath or newpath is not, in fact, a directory. Or, oldpath is a directory, and newpath exists but is not a directory.

ENOTEMPTY or EEXIST

 

newpath is a non-empty directory, i.e., contains entries other than "." and "..".

EPERM or EACCES

 

The directory containing oldpath has the sticky bit (S_ISVTX) set and the process’s effective user ID is neither the user ID of the file to be deleted nor that of the directory containing it, and the process is not privileged (Linux: does not have theCAP_FOWNER capability); or newpath is an existing file and the directory containing it has the sticky bit set and the process’s effective user ID is neither the user ID of the file to be replaced nor that of the directory containing it, and the process is not privileged (Linux: does not have the CAP_FOWNER capability); or the filesystem containing pathname does not support renaming of the type requested.

EROFS

The file is on a read-only filesystem.

EXDEV

oldpath and newpath are not on the same mounted filesystem. (Linux permits a filesystem to be mounted at multiple yiibais, butrename(2) does not work across different mount yiibais, even if the same filesystem is mounted on both.)

遵循於

4.3BSD, C89, POSIX.1-2001.

BUGS

On NFS filesystems, you can not assume that if 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.

另請參閱

• mv (1)

• chmod (2)

• link (2)

• path_resolution (2)

• renameat (2)

• symlink (2)

• unlink (2)