int renameat(int olddirfd, const char *oldpath, int newdirfd, const char *newpath);
描述The renameat() system call operates in exactly the same way as rename(2), except for the differences described in this manual page.
If the pathname given in oldpath is relative, then it is interpreted relative to the directory referred to by the file descriptor olddirfd (rather than relative to the current working directory of the calling process, as is done by rename(2) for a relative pathname).
If the pathname given in oldpath is relative and olddirfd is the special value AT_FDCWD, then oldpath is interpreted relative to the current working directory of the calling process (like rename(2)).
If the pathname given in oldpath is absolute, then olddirfd is ignored.
The interpretation of newpath is as for oldpath, except that a relative pathname is interpreted relative to the directory referred to by the file descriptor newdirfd.
返回值On success, renameat() returns 0. On error, -1 is returned and errno is set to indicate the error.
错误The same errors that occur for rename(2) can also occur for renameat(). The following additional errors can occur for renameat():
|EBADF||olddirfd or newdirfd is not a valid file descriptor.|
|oldpath is a relative path and olddirfd is a file descriptor referring to a file other than a directory; or similar for newpath andnewdirfd|
注意See openat(2) for an explanation of the need for renameat().
版本renameat() was added to Linux in kernel 2.6.16.
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