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The Open Group Base Specifications Issue 8

22 points by job 2y ago

job 2y ago
The POSIX.1-2024 specification now is available to the general public.
tannhaeuser 2y ago
Changes in system interfaces: https://pubs.opengroup.org/onlinepubs/9799919799/xrat/V4_xsh_chap01.html#tag_22_01_01 https://pubs.opengroup.org/onlinepubs/9799919799/xrat/V4_xsh... Changes to utilities: https://pubs.opengroup.org/onlinepubs/9799919799/xrat/V4_xcu_chap01.html#tag_23_01 https://pubs.opengroup.org/onlinepubs/9799919799/xrat/V4_xcu... Seems ratfor77 is gone ;) Now we only need to update LSB with Docker, io_uring, and systemd LOL
- jolmg 2y ago
  > A suggestion that was not adopted was to modify true and false to take an optional argument, and true would exit true only if the argument was non-zero, and false would exit false only if the argument was non-zero: > while true $(($x > 5 && $y <= 25)) That's good that it wasn't adopted. I think one of the primary points of usefulness of these commands is as substitutes for whatever other commands the admin may like. Like if you want a user to not have a login shell, you can set the shell to /bin/false. fakechroot also uses /bin/true to substitute other commands like systemctl and ischroot.[1] It just works best if true always returns true regardless of arguments, ditto false. The example use case isn't compelling either. In bash, you'd do this: while (( $x > 5 && $y <= 25 )) Wonder why `$(())` is standarized, but apparently `(())` isn't. [1] https://github.com/dex4er/fakechroot/blob/master/scripts/debootstrap.env.sh https://github.com/dex4er/fakechroot/blob/master/scripts/deb...
fermigier 2y ago
IIUC, here's the timeline: - Issue 8: 2024 - Issue 7: 2017 - Issue 6: 2004 - Issue 5: 1997 - Issue 4: 1992 - Issue 3: 1988
- nwellnhof 2y ago
  You're listing the latest revisions which is wrong. Issue 6 is originally from 2001 and Issue 7 from 2008.
  - fermigier 2y ago
    Thanks. So, as I suspected, the gap between 7 and 8 is quite huge (16 years).
deleted 2y ago
[deleted]
ykonstant 2y ago
>Note, however, that "$(( x=5 ))" need not be equivalent to "$(( $x=5 ))" . If the value of the environment variable x is the string "y=" , the expansion of "$(( x=5 ))" would set x to 5 and output 5, but "$(( $x=5 ))" would output 0 if the value of the environment variable y is not 5 and would output 1 if the environment variable y is 5. Similarly, if the value of the environment variable is 4, the expansion of "$(( x=5 ))" would still set x to 5 and output 5, but "$(( $x=5 ))" (which would be equivalent to "$(( 4=5 ))" ) would yield a syntax error. Ah, never change, Unix shells :) I still love this bonkers language.
BoingBoomTschak 2y ago
I think I've used the previous iteration too much for my mental health, I instantly noticed the slight color change from bluish green to greenish blue.
- McUsr 2y ago
  Nice to see a fellow Kraftwerk fan.
xxmarkuski 2y ago
I recommend looking up the Wikipedia article [0] on The Open Group, if you haven't heard of them yet. Among other things, they maintain standards such as LDAP and POSIX and also currently own the trademark for UNIX. [0] https://en.wikipedia.org/wiki/The_Open_Group https://en.wikipedia.org/wiki/The_Open_Group
rerdavies 2y ago
Out of curiousity, what is the point of having a publicly accessible standard that's exactly the same as an iso standard you have to pay to access?

22 points by job 2y ago

job 2y ago

The POSIX.1-2024 specification now is available to the general public.

Changes in system interfaces: https://pubs.opengroup.org/onlinepubs/9799919799/xrat/V4_xsh_chap01.html#tag_22_01_01 https://pubs.opengroup.org/onlinepubs/9799919799/xrat/V4_xsh... Changes to utilities: https://pubs.opengroup.org/onlinepubs/9799919799/xrat/V4_xcu_chap01.html#tag_23_01 https://pubs.opengroup.org/onlinepubs/9799919799/xrat/V4_xcu... Seems ratfor77 is gone ;) Now we only need to update LSB with Docker, io_uring, and systemd LOL

jolmg 2y ago
> A suggestion that was not adopted was to modify true and false to take an optional argument, and true would exit true only if the argument was non-zero, and false would exit false only if the argument was non-zero: > while true $(($x > 5 && $y <= 25)) That's good that it wasn't adopted. I think one of the primary points of usefulness of these commands is as substitutes for whatever other commands the admin may like. Like if you want a user to not have a login shell, you can set the shell to /bin/false. fakechroot also uses /bin/true to substitute other commands like systemctl and ischroot.[1] It just works best if true always returns true regardless of arguments, ditto false. The example use case isn't compelling either. In bash, you'd do this: while (( $x > 5 && $y <= 25 )) Wonder why `$(())` is standarized, but apparently `(())` isn't. [1] https://github.com/dex4er/fakechroot/blob/master/scripts/debootstrap.env.sh https://github.com/dex4er/fakechroot/blob/master/scripts/deb...

fermigier 2y ago

IIUC, here's the timeline: - Issue 8: 2024 - Issue 7: 2017 - Issue 6: 2004 - Issue 5: 1997 - Issue 4: 1992 - Issue 3: 1988

nwellnhof 2y ago
You're listing the latest revisions which is wrong. Issue 6 is originally from 2001 and Issue 7 from 2008.
- fermigier 2y ago
  Thanks. So, as I suspected, the gap between 7 and 8 is quite huge (16 years).

deleted 2y ago

[deleted]

ykonstant 2y ago

>Note, however, that "$(( x=5 ))" need not be equivalent to "$(( $x=5 ))" . If the value of the environment variable x is the string "y=" , the expansion of "$(( x=5 ))" would set x to 5 and output 5, but "$(( $x=5 ))" would output 0 if the value of the environment variable y is not 5 and would output 1 if the environment variable y is 5. Similarly, if the value of the environment variable is 4, the expansion of "$(( x=5 ))" would still set x to 5 and output 5, but "$(( $x=5 ))" (which would be equivalent to "$(( 4=5 ))" ) would yield a syntax error. Ah, never change, Unix shells :) I still love this bonkers language.

BoingBoomTschak 2y ago

I think I've used the previous iteration too much for my mental health, I instantly noticed the slight color change from bluish green to greenish blue.

McUsr 2y ago
Nice to see a fellow Kraftwerk fan.

xxmarkuski 2y ago

I recommend looking up the Wikipedia article [0] on The Open Group, if you haven't heard of them yet. Among other things, they maintain standards such as LDAP and POSIX and also currently own the trademark for UNIX. [0] https://en.wikipedia.org/wiki/The_Open_Group https://en.wikipedia.org/wiki/The_Open_Group

rerdavies 2y ago

Out of curiousity, what is the point of having a publicly accessible standard that's exactly the same as an iso standard you have to pay to access?