I need to disable and then enable a serial port for testing purposes on a Java program.Since the man page of setserial is stating: Using UART type none will disable the port., I use sudo setserial /dev/ttyS4 uart none to disable the port. This successfully disables the serial port. To enable the serial port again, I use sudo setserial /dev/ttyS4 -a autoconfig and the port is up as expected.After I've disabled the port, I do try to open the port using the Java gnu.io.CommPortIdentifier function. When I try to enable the port after the executing the gnu.io.CommPortIdentifier function, I get this output: $ sudo setserial /dev/ttyS4 -a autoconfigCannot autoconfigure port: Device or resource busyHow can I work around this problem? Is there a better way to enable/disable the serial port? Or can I clear the list of requests made to the port?I obviously can't just kill the process, since my test is running in it.
How to enable/disable a serial port?
linux;tty;serial port