File name on windows

Posted by Blog - uTIcARdI on March 1, 2019

Error 1

Run a bat (ping.bat) to ping multiple IPs like this:

set testipa=x.x.x.x
echo Checking ping %testipa% (15 times), please don't close current window
echo ping %testipa% (15 times)  >> test.log
ping %testipa% -w 500 -n 15 >> test.log

But got following error:

Checking ping x.x.x.x (15 times), please don't close current window
The process cannot access the file because it is being used by another process.
The process cannot access the file because it is being used by another process.

Checked it again and again, test.log is not being used by any other process.
It suddenly works when I rename it to ‘ping-old.bat’ for testing.

Conclusion
Don’t using built-in tools’ name as user executable files’ name.

Error 2

Once upon a Time, a customer reported an issue: some of devices lost after they relaunched the software.
And the device was found after comparing the data, and the hostname of the device is ‘com1’.

Searched on Microsoft and found:

Do not use the following reserved names for the name of a file:

CON, PRN, AUX, NUL, COM1, COM2, COM3, COM4, COM5, COM6, COM7, COM8, COM9, LPT1, LPT2, LPT3, LPT4, LPT5, LPT6, LPT7, LPT8, and LPT9. Also avoid these names followed immediately by an extension; for example, NUL.txt is not recommended. For more information, see Namespaces.

It failed to load the device because the software try to parsing the file because it’s not there.

Conclusion
A mechanism is required if the software save data to file by outer conditions.


File name on windows


donation

Scan the QR code using WeChat

comments powered by Disqus