Hi Wladimir, Wladimir Mutel wrote: > in Ubuntu Xenial : > $ lsb_release -rdc ; echo 1 1 + p q | dc ; echo $? > Description: Ubuntu 16.04.4 LTS > Release: 16.04 > Codename: xenial > 2 > 0 > > in Ubuntu Bionic : > $ lsb_release -rdc ; echo 1 1 + p q | dc ; echo $? > Description: Ubuntu 18.04.1 LTS > Release: 18.04 > Codename: bionic > 2 > 1 > > This change causes some scripts using 'dc' to fail, most importantly, > 'dphys-swapfile'
Thanks for that bug report. This might be the cause for https://bugs.debian.org/906767 which I'm currently trying to fix. > which for some ironic reason uses 'dc' instead of 'echo > $((...))' for its calculations. That's upstream's decision. And since I know that upstream also runs rather old Unices, I assume it's because $(( ... )) might not be available in all shells. According to https://en.wikipedia.org/wiki/Comparison_of_command_shells#cite_ref-57 it should though be available in all relevant shells since 1992. The relevant change in dc seems to be from 1.3 to 1.4: Detects and reports on any output errors; exits non-success. The fix seems simple: Drop the "q": ~ → echo 1 1 + p q | dc ; echo $? 2 1 ~ → echo 1 1 + p | dc ; echo $? 2 0 Will have to check if that's indeed the cause for https://bugs.debian.org/906767, but will do a new upload to Debian Unstable in either case. Someone else will need to take care of a regression fix for bionic though. Regards, Axel -- ,''`. | Axel Beckert <a...@debian.org>, https://people.debian.org/~abe/ : :' : | Debian Developer, ftp.ch.debian.org Admin `. `' | 4096R: 2517 B724 C5F6 CA99 5329 6E61 2FF9 CD59 6126 16B5 `- | 1024D: F067 EA27 26B9 C3FC 1486 202E C09E 1D89 9593 0EDE ** Tags added: bionic cosmic ** Changed in: dphys-swapfile (Ubuntu) Status: New => Confirmed ** Bug watch added: Debian Bug tracker #906767 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=906767 ** Changed in: dphys-swapfile (Ubuntu) Assignee: (unassigned) => Axel Beckert (xtaran) ** Changed in: dphys-swapfile (Ubuntu) Status: Confirmed => In Progress -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1788681 Title: changed exit code for 'dc' in Ubuntu Bionic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bc/+bug/1788681/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
