>>> More than anyone wanted to know! ?? Well, no - it is just what I wanted to know, only it's a bit too late. The recent Debian 12 upgrade broke an embarrassingly large fraction of my cron scripts. Even though the scripts were #!/bin/sh, the bashisms were still working, so I had assumed they were posix-compatible.
Those links look like something I should investigate, thank you. Cameron. On Tuesday, 12 September 2023 at 12:33:33 pm UTC+10 Nate Bargmann wrote: > * On 2023 11 Sep 20:50 -0500, gary....@gmail.com wrote: > > How's this related to WeeWX? I use a systemd timer to backup the > database. > > That one works a treat as I used bash, not sh > > It really depends on the distribution. Some use Bash as the login and > system shell by symlinking it to /bin/sh. When called as 'sh' Bash > mostly restricts itself to POSIX defined sh behavior. So-called > Bashisms (Bash extensions to sh grammar) are turned off and scripts > written to take advantage of Bashisms will have errors. > > Several releases ago Debian went one step further and set dash (Debian > Almquist Shell) as the default system shell as noted: > > https://wiki.debian.org/Shell > > Converting a script with Bashisms to dash (sh) can be trivial or not. > To aid in that process Debian offers checkbashisms: > > https://manpages.debian.org/bookworm/devscripts/checkbashisms.1.en.html > > Debian's choices filter down to Raspberry Pi OS and other derivatives > such as Armbian and Ubuntu flavors.. > > It is up to the script author/maintainer/distribution which shell to > support. Some distributions have their system shell scripts written > with the #!/bin/bash shebang. It is worth noting that beginning with > Debian 12 (Bookworm) Bash can no longer be set as the system shell > by running 'dpkg-reconfigure dash'. Of course manually editing the > symlink can be done but there may be unexpected results with system > scripts now written for Dash. > > More than anyone wanted to know! > > - Nate > > -- > "The optimist proclaims that we live in the best of all > possible worlds. The pessimist fears this is true." > Web: https://www.n0nb.us > Projects: https://github.com/N0NB > GPG fingerprint: 82D6 4F6B 0E67 CD41 F689 BBA6 FB2C 5130 D55A 8819 > > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/ebec42ce-240e-4c4d-a27d-95ddca6f7b2en%40googlegroups.com.
