Hi Edmund, On Tuesday 11 of November 2014 12:11:02 Urbani, Edmund wrote: > > Hello, > > now this may seem like a silly question, but I have been trying to do some > simple shell scripting with hcitool's LE scan and redirected its out and err > streams. The result is not quite what I am expecting: > > hcitool lescan --duplicates > /tmp/lescan.out > > This will create the output file immediately, but it remains empty until the > hcitool process terminates. Only then does the entire output get flushed. Any > idea why the output does not get written immediately? Ie. why I can't "tail -f > /tmp/lescan.out"? > > My intention was to pipe the output through a shell script to add a timestamp to > each line, so I get a simple log during testing. I did not want to modify > hcitool/write my own C program just for this purpose. This is due to stdout buffering. Try with stdbuf: stdbuf -oL hcitool lescan --duplicates > /tmp/lescan.out -- Best regards, Szymon Janc -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
