On 6/17/20 14:18, Piscium via arch-general wrote: (SNIP) > ... A possible issue is bashisms, however Ubuntu has > been using dash as default for 14 years and Debian also for several > years so hopefully most scripts have had bashisms removed by > upstreams. This is false. Or at the least, grievously inaccurate. Both Ubuntu and Debian use dash as the symlinked shell for /bin/sh, the default *system shell*, NOT the interactive shell for users.[0][1] Both continue to use bash as the default shell for the interactive shell (user shell). Install the latest Ubuntu and/or Debian in a VM if you don't believe me, but you'll see the same: root@ubuntutest:~# lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 20.04 LTS Release: 20.04 Codename: focal root@ubuntutest:~# which $SHELL /bin/bash root@ubuntutest:~# ls -l $SHELL -rwxr-xr-x 1 root root 1183448 Feb 25 12:03 /bin/bash root@ubuntutest:~# file $SHELL /bin/bash: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=a43fec47192ff49c2d3fed671f2be8df7e83784a, for GNU/Linux 3.2.0, stripped root@ubuntutest:~# echo $SHELL /bin/bash root@debian:~# lsb_release -a No LSB modules are available. Distributor ID: Debian Description: Debian GNU/Linux 10 (buster) Release: 10 Codename: buster root@debian:~# which $SHELL /bin/bash root@debian:~# ls -l $SHELL -rwxr-xr-x 1 root root 1168776 Apr 18 2019 /bin/bash root@debian:~# file $SHELL /bin/bash: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, BuildID[sha1]=ffe165dc81a64aea2b05beda07aeda8ad71f1e7c, stripped root@debian:~# echo $SHELL /bin/bash In fact, Debian explicitly warns that dash is intended to NOT be used as the interactive shell: "It is not intended to be used interactively by a user, for example, in a terminal emulator, but rather focuses on speed and compatibility with standards. Therefore, many interactive features are not present in Dash, making it faster and more memory efficient than Bash."[1] It's faster *because they removed user features*. [0] https://wiki.ubuntu.com/DashAsBinSh [1] https://wiki.debian.org/Shell#Non-interactive_Shell -- brent saner https://square-r00t.net/ GPG info: https://square-r00t.net/gpg-info
Attachment:
signature.asc
Description: OpenPGP digital signature
