ggentropy: add "portable" path using /dev/urandom

[alarixnia]

Needed on Solaris and so on.

[mikejsavage]

seems like it would be better to use arc4random on solaris

Also I'm hesitant to add a catch all. ggentropy already has code paths for platforms that I never have and never will actually test it on and Solaris is another like that. I'd prefer to at least restrict it to platforms I've skimmed the manpages for

[alarixnia]

we still support solaris 10 in pkgsrc which lacks such a function, among other less commom unix-likes, so i'd like to keep patching this in.

[mikejsavage]

On Thu, Jan 20, 2022 at 02:12:33PM -0800, nia wrote: we still support solaris 10 in pkgsrc which lacks such a function, among other less commom unix-likes, so i'd like to keep patching this in. -- Reply to this email directly or view it on GitHub: #18 (comment) You are receiving this because you commented. Message ID: ***@***.***>

Do you know if there's some way to detect solaris 10 at compile time? Would be nice to use their entropy syscall when available https://gist.github.com/basman/587684 makes it look like there isn't

[curiositycasualty]

Add Debian 8 to the list of platforms lacking SYS_getrandom:

gcc -I/tmp/work/openssl-1.1.1m/include -std=gnu99 -fPIC -I/tmp/build/usr/local/openresty/luajit/include/luajit-2.1 -c src/ggentropy.c -o src/ggentropy.o
src/ggentropy.c: In function 'ggentropy':
src/ggentropy.c:59:20: error: 'SYS_getrandom' undeclared (first use in this function)
  int ok = syscall( SYS_getrandom, buf, n, 0 );
                    ^
src/ggentropy.c:59:20: note: each undeclared identifier is reported only once for each function it appears in

Error: Failed installing dependency: https://luarocks.org/bcrypt-2.2-1.src.rock - Build error: Failed compiling object src/ggentropy.o

[mikejsavage]

Sorry, but I have no interest in supporting Solaris from 2005 even if it is still under LTS.

Likewise Debian 8 is on a second level of LTS with the underlying kernel EOL'd.