3 ms·

Some goodies for POSIX sh programmers: * readlink/realpath (https://austingroupbugs.net/view.php?id=1457 https://austingroupbugs.net/view.php?id=1457) * find

Some goodies for POSIX sh programmers: * readlink/realpath (https://austingroupbugs.net/view.php?id=1457 https://austingroupbugs.net/view.php?id=1457) * find -print0, xargs -0 and read -d (https://austingroupbugs.net/view.php?id=243 https://austingroupbugs.net/view.php?id=243) * find -iname (https://austingroupbugs.net/view.php?id=1031 https://austingroupbugs.net/view.php?id=1031 * sed -E (https://austingroupbugs.net/view.php?id=528 https://austingroupbugs.net/view.php?id=528) * set -o pipefail (https://austingroupbugs.net/view.php?id=789 https://austingroupbugs.net/view.php?id=789)

clausecker 2y ago
Also c17 -G to create shared objects, SIGWINCH and tcgetwinsize() to query the size of a terminal window, lots of new shell features, make is now somewhat useful, gettext() and associated commands are in, asprintf(), C17 support, strlcpy, strlcat, and many more all new and exciting features.
- a-french-anon 2y ago
  asprintf is a pretty cool one. https://frippery.org/make/2024.html https://frippery.org/make/2024.html details some of the make changes.
- thechao 2y ago
  asprintf is a nice toy, but it should really take a context and a "realloc" function pointer to be useful, in general. Here's hoping for 2040!
  - tedunangst 2y ago
    How many other posix functions take allocators?
- cperciva 2y ago
  c17 -G to create shared objects Finally! It always seemed very strange to me that posix said that shared objects were a thing and provided a rtld API for using them, but never specified how to create them.
- nwellnhof 2y ago
  I'm most excited about getentropy().
dwheeler 2y ago
I agree! You can blame me for some of those proposals :-), my thanks to the POSIX team for getting this out the door. The sed -E option makes it easy to portably use extended regular expressions. The find -print0, xargs -0, and read -d provide portable ways to securely process lists of files. They were already widely implemented, but now they're officially part of the spec and can be counted on being present in many other places.
- stephenr 2y ago
  Thanks, those will indeed be useful. Looks like `pipefail` is already in Dash https://salsa.debian.org/debian/dash/-/blame/debian/unstable/debian/changelog?ref_type=heads#L24 https://salsa.debian.org/debian/dash/-/blame/debian/unstable...
- EuAndreh 2y ago
  wow, I just realized you're the same dwheeler from the work on diverse double-compilation! Thanks for the improvements on POSIX, I've read many issues and discussions raised by you in the past couple of years. If fact, I think it was one of yoir comments on make(1)'s dynamic dependency graph that reassured me I had a correct grasp on its execution model!
  - dwheeler 2y ago
    Thanks so much, that means a lot.
casey2 2y ago
I for one am overjoyed that i can now type readlink instead of invoking a shell script. I know newbies will also be overjoyed now that they can just read a LLONG_MAX page manual containing the solution to all their problems
jwilk 2y ago
Also $'…' strings: https://austingroupbugs.net/view.php?id=249 https://austingroupbugs.net/view.php?id=249
mathfailure 2y ago
But `find -iname` always worked; why was it proposed again?
- BoingBoomTschak 2y ago
  ??? It wasn't standardized before, so it didn't "always work" on any implementation.

clausecker 2y ago

Also c17 -G to create shared objects, SIGWINCH and tcgetwinsize() to query the size of a terminal window, lots of new shell features, make is now somewhat useful, gettext() and associated commands are in, asprintf(), C17 support, strlcpy, strlcat, and many more all new and exciting features.

a-french-anon 2y ago
asprintf is a pretty cool one. https://frippery.org/make/2024.html https://frippery.org/make/2024.html details some of the make changes.
thechao 2y ago
asprintf is a nice toy, but it should really take a context and a "realloc" function pointer to be useful, in general. Here's hoping for 2040!
- tedunangst 2y ago
  How many other posix functions take allocators?
cperciva 2y ago
c17 -G to create shared objects Finally! It always seemed very strange to me that posix said that shared objects were a thing and provided a rtld API for using them, but never specified how to create them.
nwellnhof 2y ago
I'm most excited about getentropy().

dwheeler 2y ago

I agree! You can blame me for some of those proposals :-), my thanks to the POSIX team for getting this out the door. The sed -E option makes it easy to portably use extended regular expressions. The find -print0, xargs -0, and read -d provide portable ways to securely process lists of files. They were already widely implemented, but now they're officially part of the spec and can be counted on being present in many other places.

stephenr 2y ago
Thanks, those will indeed be useful. Looks like `pipefail` is already in Dash https://salsa.debian.org/debian/dash/-/blame/debian/unstable/debian/changelog?ref_type=heads#L24 https://salsa.debian.org/debian/dash/-/blame/debian/unstable...
EuAndreh 2y ago
wow, I just realized you're the same dwheeler from the work on diverse double-compilation! Thanks for the improvements on POSIX, I've read many issues and discussions raised by you in the past couple of years. If fact, I think it was one of yoir comments on make(1)'s dynamic dependency graph that reassured me I had a correct grasp on its execution model!
- dwheeler 2y ago
  Thanks so much, that means a lot.

casey2 2y ago

I for one am overjoyed that i can now type readlink instead of invoking a shell script. I know newbies will also be overjoyed now that they can just read a LLONG_MAX page manual containing the solution to all their problems

jwilk 2y ago

Also $'…' strings: https://austingroupbugs.net/view.php?id=249 https://austingroupbugs.net/view.php?id=249

mathfailure 2y ago

But `find -iname` always worked; why was it proposed again?

BoingBoomTschak 2y ago
??? It wasn't standardized before, so it didn't "always work" on any implementation.