为什么Windows XCOPY在通过psexec通过Perl系统调用调用时失败？

File creation error – Incorrect function.

(根据用户的不同,该消息可能改为“拒绝访问”.)

注意$！给出以下诊断：

Bad file descriptor at syscall.pl.
perl exited on REMOTE with error code 9.

是否通过system()或反引号调用xcopy似乎没有区别.

我应该指出“from”文件夹是一个ClearCase动态视图(M盘).

奇怪的是,当直接从psexec调用时,xcopy似乎正常工作.

以下是其他一些奇怪之处：

> xcopy并不总是失败.某些文件似乎只是“被诅咒”.只读属性似乎不是一个因素.
>一旦复制成功(例如,通过Windows资源管理器),解除诅咒,该特定文件将不再导致xcopy错误.
>问题似乎与目标文件夹不一致.解除诅咒后,可以将文件xcopy到新目的地.

以下是我用来缩小问题的测试Perl脚本的一部分(文件夹名称已经通用化).
请注意,对于每个测试的“my $cmd”,我都会注释掉前一个,并添加了状态注释.

# ClearCase directory M:STUFFABC contains ABC.tst,ABC.zip and several nonempty subfolders

# Directory copy,D drive to D drive
#my $cmd = "xcopy D:tempsrc D:tempdest /e /i /y";
# works

# Directory copy,M drive to D drive
#my $cmd = "xcopy M:STUFFABC D:tempdest /e /i /k /y";
# fails with "File creation error - Incorrect function" or "Access denied"

# File copy (.tst),M drive to D drive (trailing backslash)
#my $cmd = "xcopy M:STUFFABCABC.tst D:tempdest";
# works!

# Directory copy,M drive to D drive (trailing backslash)
#my $cmd = "xcopy M:STUFFABC D:tempdest /e /i /k /y";
# copies the .tst file,but fails on the .zip (yes,the .tst file is now getting copied)

# Directory copy,M drive to D drive (same as above but without trailing backslash)
#my $cmd = "xcopy M:STUFFABC D:tempdest /e /i /k /y";
# copies the .tst file,but fails on the .zip

# File copy (.zip),M drive to D drive
#my $cmd = "xcopy M:STUFFABCABC.zip D:tempdest";
# fails 

# File copy (.zip),M drive to D drive (trailing backslash)
#my $cmd = "xcopy M:STUFFABCABC.zip D:tempdest";
# fails

# After manually (Windows Explorer) copying the .zip file to the dest folder and deleting it  
# Directory copy,M drive to D drive with /c (continue after failure)
#my $cmd = "xcopy M:STUFFABC D:tempdest /c /i /e";
# copies the .tst and .zip file (!),but fails on all other files (folders were successfully created)

# After manually copying the Folder1 folder to the dest folder and then deleting it  
#my $cmd = "xcopy M:STUFFABC D:tempdest /c /i /e";
# copies the .tst and .zip file and the contents of Folder1(!),but fails on all other files

# Different dest:
my $cmd = "xcopy M:STUFFABC D:tempdest1 /c /i /e";
# Same results as immediately above

print "Executing system command: $cmd ...n";
system ($cmd);
#print(`$cmd 2>&1`); #same