13 Mar
2020
13 Mar
'20
4:45 p.m.
Meant for the list (and don't get me started on Reply All)...
-- Dave
---------- Forwarded message ----------
Date: Fri, 13 Mar 2020 21:43:51 +1100 (EST)
From: Dave Horsfall <dave(a)horsfall.org>
To: Greg 'groggy' Lehey <grog(a)lemis.com>
Subject: Re: [TUHS] Command line options and complexity
On Fri, 13 Mar 2020, Greg 'groggy' Lehey wrote:
It's in "df" as well, praise Cthulu:
aneurin# df -h
Filesystem Size Used Avail Capacity Mounted on
/dev/ad0s1a 496M 302M 154M 66% /
devfs 1.0K 1.0K 0B 100% /dev
tmpfs 1000 272K 999M 0% /tmp
/dev/ad0s1d 2.9G 1.4G 1.2G 54% /usr
/dev/ad0s1e 989M 581M 329M 64% /var
/dev/ad0s1f 3.9G 2.2G 1.4G 62% /home
/dev/ad0s1g 8.9G 8.0G 127M 98% /usr/local
fdescfs 1.0K 1.0K 0B 100% /dev/fd
procfs 4.0K 4.0K 0B 100% /proc
(Memo to self: see where all the room has gone in /usr/local, as that's where I
assigned the leftover space after the other partitions.)
No, I've never liked stuffing everything under the root file system as both the
Mac and Penguin do; fill the root file system and you're hosed (and I also have
an itch about /tmp being there as it's a world-writable directory).
Years ago I wrote a simple script "lss" which did the sort after being
howled down on one of the FreeBSD lists; what a surprise to see "-S"...
Heck, back in my UNSW days I suggested extending stty() to cover non-TTY
devices and got trashed by the AGSM/ElecEng mob; well well, look at ioctl()
when it appeared.
-- Dave
-h is a
gnuism, isn't it?
It might have originated there, but then I would expect it to be spelt
'--produce-human-readable-output'. I haven't been able to establish from
the
FreeBSD sources or commit logs when it was introduced. It would clearly have
been a reimplementation.
https://pubs.opengroup.org/onlinepubs/9699919799/utilities/ls.html does
specify the -S switch. That's POSIX, isn't it?
So it is! This was the first option that I wanted to add, back when I still
had practice wheels. I asked my mentor, and he said "not the Unix way", so I
let it be. Then Wes Peters came up with the idea, and I thought he committed
it, but it seems that it ultimately came from Kostas Blekos in 2005, based on
the same feature on NetBSD and OpenBSD. I wonder when it made it to POSIX.