>decide to test random things with pv >gnu yes is fucking

>>60877367
autism thread?

BITS 64
CPU X64

global _start
section .text
_start:
    inc rdi          ; stdout, will not change after syscall
    mov rsi, y    ; will not change after syscall
    mov rdx, 8192 ; will not change after syscall
_loop:
    mov rax, 1    ; sys_write
    syscall
jmp _loop
    
y:    times 4096 db "y", 0xA

autism thread.

>>60877395
it doesn't work

$ ./a.out test
y
y
y
y
y

it only outputs y

>>60877418
that's the point
fix it yourself if you want arguments

>>60877429
whatever I think i figured it out

// adjust to fit the file descriptor buffering in your kernel
#define TOTAL 32768

// output y\n as fast as possible to stdout
// or output whatever string the user provides
int main(int argc, char* argv[]) {

    // remove calling name
    argc--; argv++;

    // default values
    size_t LEN = 2;
    char* yes = "y\n";

    // handle args
    if (argc > 0) {
        // TOTAL less one for space for \n
        LEN = strnlen(argv[0], TOTAL-1) + 1;
        yes = argv[0]; // new string
        // we don't need a \0 anyhow
        yes[LEN-1] = '\n';
    }

    // alloc buffer with zeros statically
    char buf[TOTAL] = { 0 };
    // track location in buffer
    size_t bufused = 0;

    // copy string to fill buffer
    while (bufused+LEN <= TOTAL) {
        memcpy(buf+bufused, yes, LEN);
        bufused += LEN;
    }

    // print forever bro
    while (write(1, buf, bufused) == bufused) {}
    // tf bro
    return 1;
}

I guess stdio is just shit.

>>60877470

└─> ./muh-yes-muhfugga | pv >/dev/null 
^C.6GiB 0:00:04 [6.76GiB/s] [   <=>                                           ]

how underwhelming...I thought it was some weird gnu magic.