When entering commands into the at> prompt, I am unable to activate command-line autocompletion using the Tab key.
$ at now + 4 hour
at>
Is there a way to turn on tab completion in the at> prompt?
I am using CentOS 7 and Bash with at version at-3.1.13-24.el7.x86_64.
You could use your interactive shell's here-document feature to write the commands, and pass the result to at via stdin (rather than having at open and read stdin itself):
$ cat <<EOF | at now + 4 hour
> echo 'doing stuff now' >/tmp/foo
> EOF
warning: commands will be executed using /bin/sh
job 22 at Wed Jun 10 16:11:00 2020
At least on my system (Ubuntu / bash 4.4.20(1)), tab completion works inside the here-doc - for completing the /tmp/foo filename for example.
read -e for that, too.
Probably not:
ldd /usr/bin/at
linux-vdso.so.1 (0x00007ffd24182000)
libc.so.6 => /lib64/libc.so.6 (0x00007f70946ed000)
libfl.so.2 => /usr/lib64/libfl.so.2 (0x00007f70946e8000)
/lib64/ld-linux-x86-64.so.2 (0x00007f70948f8000)
(My) at is not linked against readline (or something similar).
