Swift: Use actual device architecture for reporting

[badboy]

No description provided.

[badboy]

ok, this is .. getting confusing. Guess we did the right thing already?
Apple makes it confusing and we add some confusion on top.

We currently report it like this in client_info:

client_info field	Sysctl var name	sysctl field
architecture	machine	HW_MODEL
device_model	model	HW_MACHINE

my M4:

❯ ./sys
CTL_HW HW_MODEL: Mac16,8
CTL_HW HW_MACHINE: arm64
CTL_HW HW_MACHINE_ARCH: (null)

sample app in the simulator (iPhone 17):

HW_MODEL: Mac16,8
HW_MACHINE: arm64
MACHINE_ARCH: Unknown

sample app on my iPad:

HW_MODEL: J418AP
HW_MACHINE: iPad8,10
MACHINE_ARCH: Unknown

---

At least it's documented now.

Details

gcc -o sys sys.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/sysctl.h>

char *my_sysctl(int ctl, int ht) {
  static char buf[48];
  size_t len = sizeof(buf);

  int mib[] = { ctl, ht };
  int ret = sysctl(mib, 2, &buf, &len, NULL, 0);
  if (ret == -1) {
    return NULL;
  }

  return strdup(buf);
}

#define SYSCTL(ctl, hw) do { \
  char *res = my_sysctl(ctl, hw); \
  printf("%s %s: %s\n", #ctl, #hw, res); \
  free(res); \
} while (0);

int main(int argc, char** argv)
{
  SYSCTL(CTL_HW, HW_MODEL);
  SYSCTL(CTL_HW, HW_MACHINE);
  SYSCTL(CTL_HW, HW_MACHINE_ARCH);
  return 0;
}