drewdevault

drewdevault, 6 hours ago

@vi fixed

drewdevault, 2 days ago

Fleshed out libc a tiny bit more and tried to port some sbase utilities before calling it quits for today

drewdevault, 2 days ago

drewdevault, 2 days ago

Another day, another GCC cross compiler

drewdevault, 2 days ago

"success"

drewdevault, 2 days ago

So, in the morning of day 17, I have three languages running in userspace: Hare, C, and C++

I will keep fleshing out libc and the necessary syscalls until we have a shell. I suspect there is another scheduler bug as well.

Coming up soon: pipe(2), dup(2), fcntl(2)

drewdevault, 2 days ago

@yrlf libstdc++

drewdevault, 2 days ago

@lritter nope

drewdevault, 2 days ago

@lritter well, everything is cross-compiled. It's not self-hosting yet

drewdevault, 2 days ago

pipe(2)

drewdevault, 2 days ago

As a matter of interest:

https://git.sr.ht/~sircmpwn/bunnix/tree/master/item/sys/fs/pipe.ha

drewdevault, 2 days ago

Day 17 so far:

• New syscalls: chdir, fchdir, pipe; getpid/getppid removed, replaced with getcreds (also does uid, gid, euid, sid, etc)
• Mountpoints refactored to live on inodes, all *at (e.g. openat) syscalls finished
• C++ running in userspace (ugh, needed for a future gcc port)
• Bunnix target patched into binutils & gcc cross toolchain, proper sysroot set up
• libc expanded: dirent, getopt, stat, time, plus riggings for the new syscalls (e.g. pipe, getuid)

drewdevault, 2 days ago

Progress towards shell: I have some dash patches that almost build; 11 libc functions remain. These are mostly going to involve shimming out signal-handling functions until I implement them in the kernel.

I have 44 coreutils from sbase building in my sysroot (e.g. grep, sed, od, uniq, etc)

A keyboard driver and console thing for an interactive shell remains to be done in the kernel

drewdevault, 2 days ago

Funnily enough, of all of the syscalls I have left to implement before I can finish porting dash, I suspect getcwd will be the most difficult.

drewdevault, 2 days ago

I think I'll end up having to open(cwd + "/..") in a loop until cwd == ".." to construct the path, or at least something like that

Or add a direntry cache like Linux has, but that would be a fair bit of work

Or, shit, I could just stick a cwd string on the process structure and live with the fact that it breaks if the cwd moves underneath you

drewdevault, 1 day ago

✔️ new syscalls: dup, dup2

drewdevault, 1 day ago

Down to three missing symbols to build this (patched) version of dash: fcntl (with SETFL and SETFD), getgroups, and getcwd

There is a syscall for getgroups, but it's missing in libc.

drewdevault, 1 day ago

@mort https://git.sr.ht/~sircmpwn/hautils

drewdevault, 1 day ago

@mort not quite, hautils does build (in part) for Bunnix but I'm planning to port sbase for now

drewdevault, 1 day ago

Yeah, it turns out that getcwd is a massive bitch to implement

I'm just going to write a shitty/buggy implementation and move on for now

drewdevault, 1 day ago

@mxk the latter

drewdevault, 1 day ago

Day 18

drewdevault, 3 hours ago

Day 19 -- going to Utrecht tonight so there's not going to be much

• dash incorporated into source tree to provide /bin/sh
• New syscalls: setcreds (provides setuid et al), setgroups, mount
• libc expanded with support for passwd, groups, shadow, etc, login(1) stuff
• Bunnix executes /etc/rc on boot as a shell script

I have realized that dash depends on signals to work properly, however, so I will probably have to either get that working or switch to rc.