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