- Love it! It's entirely inapplicable and useless to me but it embodies the spirit of Show HN and what the spirit of programming in the 80s and 90s was.
- I had a similar problem for a Thinkpad, except there is more than one cell at different capacities that are switched between. The existing battery manager would not tell me which battery was actually being used, and whether there was still a secondary battery waiting to be discharged.
I wrote a very quick hacky program for X11 that stays always visible that will display the information for any number of batteries: https://gitlab.com/danbarry16/bat_mon
It ends up being 50kB with minimal optimization and sports a lightweight X11 library (GUI) and JSON parser (configuration).
- I have a use for this: A somewhat portable one-liner to go in my waybar/sway/i3 configs!
by emanuele-em
3 subcomments
- 301 bytes! The base64 one-liner install is a nice flex. Accepting an infinite loop when energy_full doesn't exist is peak code golf, perfectly reasonable when every byte counts. Is there a writeup on the assembly somewhere?
- This commit (https://github.com/meribold/btry/commit/75cba2be52cc8fbdc72b...) worked for me !
by anonymous67453
1 subcomments
- Dell 5440
$ git clone https://github.com/meribold/btry
...
$ make
as -mx86-used-note=no btry.s -o btry.o
objcopy -O binary btry.o btry
chmod +x btry
$ ./btry
Segmentation fault ./btry
$ strace -f ./btry
execve("./btry", ["./btry"], 0x7ffc1a562078 /* 57 vars */) = -1 ENOMEM (Cannot allocate memory)
$ file btry
btry: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, corrupted section header size
by mehdistronghold
0 subcomment
- Really cool ! I like to see these kind of post here
by userbinator
1 subcomments
- It doesn't even look like particularly optimised Asm (could immediately spot a few savings, despite how horrible GAS syntax is to read...), but is definitely not "compiler slop"[1] either, which shows just how inefficient the majority of programs actually are. Of course even the ELF header takes up a significant amount of space, but this reminds me of how PC magazines would print short listings of utilities like this, often a few dozen up to a few hundred bytes at most --- in DOS .COM format, which is headerless and thus pure machine instructions.
[1] In the late 80s and early 90s, the battle between those writing handwritten Asm and those using compiled HLLs has many similarities to AI-generated vs non-AI code today.
- Love this kind of tiny, over‑engineered hack—totally impractical, but pure Show HN energy.
- As always with these admirable hacks, I feel compelled to point out these are not really ELF executables but just small files you can trick the x86_64 Linux kernel into loading.
I mean they're very clever and legit and kudos to the people who develop these exploits, but they're not ELF.
by darioterror
0 subcomment
- [dead]
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