Le mar. 7 mars 2023 à 05:36, Bryan Gardiner <[email protected]> a écrit : > > Hi folks, > > How can I follow Portage's compressed build logs in real time as they > are generated? > > I keep build logs and use FEATURES=compress-build-logs so that they > don't get too large. I can peek at how a build is going with zless on > build.log.gz, which doesn't update (understandably), but I would > really like to be able to watch a log with some "tail -f" equivalent. > I get streaming output with > > tail -c +1 -f build.log.gz | od -t x1 > > but the following hangs with no output: > > tail -c +1 -f build.log.gz | gunzip > > even with a build log that is 72KB compressed (2.4MB uncompressed), > which should be larger than any pipe buffers... Any idea why gunzip > can't handle this, or what I should I should be doing instead? > > Thanks, > Bryan > Hi
Reading the man page, "zless" is just a wrapper around "less". You can check with: $ file $(which zless) /usr/bin/zless: POSIX shell script, ASCII text executable $ less $(which zless) So it should support the same options including typing "F" at the end of a file to keep trying to read when the end of file is reached. I made a small test, but it didn't work: # Create a growing file $ yes | nl | gzip > zless-test.gz & # Try to follow at the end $ zless zless-test.gz With ">" to go to the end and "F" to continue, I didn't get the expected behavior, it stood still at the point I was viewing. I don't know if it's really a bug or if I made a mistake... (Don't forget to stop the growing file :) ) Best regards Mickaël Bucas
