In Java 1.6 File.renameTo() atomic on linux? -

as title says, in java 1.6 file.renameto() atomic operation on posix linux?

according this link, rename operation in posix linux atomic, however, hold true file.renameto?

with linux, rename atomic if , if source path , target path under same mount point (not filesystem).

file.renameto() call rename(2) under linux, you'll have test return value see if file renamed.

with java 7, drop file, instead use:

files.move(src, dst, standardcopyoption.atomic_move); 

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here example. on system, /home different mount point /, first rename succeed (same filesystem), second rename fails:

fge@alustriel:~/tmp/t$ cat rename.java  import java.io.file;  public final class rename {     private rename()     {     }      public static void main(final string... args)     {         final file f1 = new file("/home/fge/tmp/t/foo");         final file f2 = new file("/home/fge/tmp/t/bar");         final file f3 = new file("/tmp/foo");          if (f1.renameto(f2))             f2.renameto(f3);     } }  fge@alustriel:~/tmp/t$ javac rename.java fge@alustriel:~/tmp/t$ strace -ff -o trace java rename fge@alustriel:~/tmp/t$ grep -w rename trace.* trace.17107:rename("/home/fge/tmp/t/foo", "/home/fge/tmp/t/bar") = 0 trace.17107:rename("/home/fge/tmp/t/bar", "/tmp/foo") = -1 exdev (invalid cross-device link)