// Output from Zig
openat(AT_FDCWD, "/sys/class/backlight/intel_backlight/brightness", O_RDWR|O_CLOEXEC) = 3
write(3, "7500", 4)                     = 4
write(3, "\n", 1)                       = -1 EINVAL (Invalid argument)

// Output from C
openat(AT_FDCWD, "/sys/class/backlight/intel_backlight/brightness", O_WRONLY|O_CREAT|O_TRUNC, 0666) = 3
fstat(3, {st_mode=S_IFREG|0664, st_size=4096, ...}) = 0
write(3, "7500\n", 5)                   = 5
close(3)                                = 0