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| 18:50.42 | kyak | jow_laptop: have you ever encountered an "Error: output file cannot be in the UBIFS root directory" in mkfs.ubifs? Obviously, the output file is not requested to be located in ubifs root |
| 18:50.59 | kyak | seems like a bug in mkfs.ubifs |
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| 19:01.13 | kyak | http://lists.infradead.org/pipermail/linux-mtd/2012-September/044071.html |
| 19:01.28 | kyak | seems like this problem has appeared recently |
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| 19:05.28 | kyak | but mkfs.ubifs.c hadn't really changed.. i supposed it doesn't like something.. maybe some links in root-xburst |
| 19:10.48 | kyak | hah |
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| 19:12.11 | kyak | mkfs.ubifs fails miserable because /home directory is not readable for user |
| 19:13.18 | kyak | and there is a code trying to traverse directories doing open(dir_name, O_RDONLY); |
| 19:14.15 | kyak | perhaps it returns something mkfs.ubifs doesn't expect |
| 19:15.20 | wpwrak | if you run as root, does it work then ? or if you make /home user-readable |
| 19:16.16 | wpwrak | the complaint about the root directory seems rather bogus anyway. i.e., would a subdirectory be any better ? |
| 19:17.39 | kyak | it works if i run as root |
| 19:17.55 | kyak | this shit is reproducible, see: |
| 19:18.40 | wpwrak | maybe it's just a case of bad error checking ? |
| 19:18.40 | kyak | cd ~; mkdir -p /tmp/wtf/wtf1; chmod u-r /tmp/wtf; mkfs.ubifs -m 4096 -e 516096 -c 4095 -d /tmp/wtf/wtf1 -o mytest.img |
| 19:19.13 | kyak | this is a real bad checking if the file (-o) is inside the root (-d) |
| 19:19.31 | kyak | you can have a look at in_path(..) in mkfs.ubifs.c |
| 19:20.11 | kyak | mytest.img is not inside /tmp/wtf/wtf1, but mkfs.ubifs fails because /tmp/wtf is not readable |
| 19:20.22 | wpwrak | yeah, that's what i meant |
| 19:20.36 | wpwrak | actually, the error message already raised a red flag for me |
| 19:20.44 | kyak | i think i will post to their mailing list really fast |
| 19:21.11 | kyak | since i don't want to reveal my /home yet :) |
| 19:21.16 | wpwrak | i suppose the purpose of this is to avoid trying to add the output file to its own input. that's a very reasonable precaution |
| 19:21.25 | kyak | yep, indeed |
| 19:21.32 | wpwrak | but the implementation seems to only consider one special case, out of many |
| 19:21.40 | kyak | but maybe the way this check is done is not quite good |
| 19:21.54 | kyak | so we agree :) |
| 19:22.11 | wpwrak | so the error message is either unusually specific (i.e., it would also catch other cases but complain in a different way), or |
| 19:22.27 | wpwrak | they were just too lazy to handle the general case, or |
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| 19:22.45 | wpwrak | they didn't quite realize what the general case is. |
| 19:23.15 | wpwrak | laziness or lack of understanding are reason to distrust what else is there |
| 19:23.29 | wpwrak | i call such things "negative competence markers" :) |
| 19:25.33 | kyak | but i'm not going to look into a solution/workaround, because i'm both lazy and uncompetent :) |
| 19:25.54 | wpwrak | heh :) |
| 19:26.13 | wpwrak | well, with running as root, you already have a solution :) |
| 19:26.44 | wpwrak | now join the fight against those stupid programs that tell you not to do things under root ;-) |
| 19:27.30 | kyak | i'd rather set the /home back to readable than build openwrt as root :) |
| 19:27.58 | kyak | i had ocassions several times when my packages wanted to touch the host filesystem :) |
| 19:28.09 | wpwrak | how cowardly ;-) |
| 19:28.35 | kyak | --) |
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| 19:37.44 | kyak | it's their problem now http://lists.infradead.org/pipermail/linux-mtd/2012-October/044290.html |
| 19:38.07 | kyak | though i realize it won't probably be fixed without a suggested patch :) |
| 19:38.48 | kyak | i remember how i tried to submit a three-line patch to linux kernel.. Never ever i will do that again |
| 19:39.34 | kyak | it's much more efficient just to apply this patch locally on every kernel update than to push anything to linux kernel |
| 19:40.42 | wpwrak | huh ? never had much trouble with kernel patches |
| 19:44.51 | larsc | back in your days nobody cared about code quality ;) |
| 19:56.09 | wpwrak | of course not. the folks writing bad code hadn't even noticed linux at that time, let alone submitted patches :) |
| 19:56.23 | larsc | hehe |
| 20:00.58 | kyak | https://patchwork.kernel.org/patch/1227361/ |
| 20:01.05 | kyak | this is how i gave up |
| 20:01.56 | kyak | there was a pre-story, when i posted to the "wrong ML".. who it knew it should go to "net-next" |
| 20:03.19 | kyak | back to mtd; on a second thought, it might be not trivial at all to find if a file is in directory or subdirectories |
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| 20:03.47 | kyak | have to handle all types of shit, like links and mount --bind and whatnot |
| 20:08.36 | kyak | so i've sent that patch 5 times, just checked my outbox |
| 20:09.10 | kyak | "wrong ML and no right people in cc", then "no proper sign-offs", then something else, at last "git am your_patch" fails." |
| 20:09.35 | kyak | too much for two lines of actual code, how do you think? |
| 20:43.07 | whitequark | kyak: the fact that your patch is 2-line doesn't mean it shouldn't be reviewed as throughly as a 1000-line one |
| 20:43.30 | whitequark | e.g. remember the trivial, 2-line patch in openssl which exposed all keys in Debian for 2 years? |
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