/*
 *
 * Conky, a system monitor, based on torsmo
 *
 * Any original torsmo code is licensed under the BSD license
 *
 * All code written since the fork of torsmo is licensed under the GPL
 *
 * Please see COPYING for details
 *
 * Copyright (c) 2005-2021 Brenden Matthews, Philip Kovacs, et. al.
 *	(see AUTHORS)
 * All rights reserved.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
#include "config.h"

#include <sys/dkstat.h>
#include <sys/ioctl.h>
#include <sys/param.h>
#include <sys/resource.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/user.h>

#include <net/if.h>
#include <net/if_media.h>
#include <net/if_mib.h>
#include <net/if_var.h>

#include <devstat.h>
#include <ifaddrs.h>
#include <limits.h>
#include <unistd.h>

#include <dev/acpica/acpiio.h>
#if 0
#include <dev/wi/if_wavelan_ieee.h>
#endif

#include <mutex>

#include "conky.h"
#include "diskio.h"
#include "freebsd.h"
#include "logging.h"
#include "net_stat.h"
#include "text_object.h"
#include "top.h"

#define GETSYSCTL(name, var) getsysctl(name, &(var), sizeof(var))
#define KELVTOC(x) ((x - 2732) / 10.0)
#define MAXSHOWDEVS 16

#if 0
#define FREEBSD_DEBUG
#endif

kvm_t *kd;
std::mutex kvm_proc_mutex;

__attribute__((gnu_inline)) inline void proc_find_top(struct process **cpu,
                                                      struct process **mem,
                                                      struct process **time);

static short conky_cpu_setup = 0;

static int getsysctl(const char *name, void *ptr, size_t len) {
  size_t nlen = len;

  if (sysctlbyname(name, ptr, &nlen, nullptr, 0) == -1) { return -1; }

  if (nlen != len && errno == ENOMEM) { return -1; }

  return 0;
}

struct ifmibdata *data = nullptr;
size_t len = 0;

static int swapmode(unsigned long *retavail, unsigned long *retfree) {
  int n;
  unsigned long pagesize = getpagesize();
  struct kvm_swap swapary[1];

  *retavail = 0;
  *retfree = 0;

#define CONVERT(v) ((quad_t)(v) * (pagesize / 1024))

  n = kvm_getswapinfo(kd, swapary, 1, 0);
  if (n < 0 || swapary[0].ksw_total == 0) { return 0; }

  *retavail = CONVERT(swapary[0].ksw_total);
  *retfree = CONVERT(swapary[0].ksw_total - swapary[0].ksw_used);

  n = (int)((double)swapary[0].ksw_used * 100.0 / (double)swapary[0].ksw_total);

  return n;
}

void prepare_update(void) {}

int update_uptime(void) {
  int mib[2] = {CTL_KERN, KERN_BOOTTIME};
  struct timeval boottime;
  time_t now;
  size_t size = sizeof(boottime);

  if ((sysctl(mib, 2, &boottime, &size, nullptr, 0) != -1) &&
      (boottime.tv_sec != 0)) {
    time(&now);
    info.uptime = now - boottime.tv_sec;
  } else {
    fprintf(stderr, "Could not get uptime\n");
    info.uptime = 0;
  }

  return 0;
}

int check_mount(struct text_object *obj) {
  struct statfs *mntbuf;
  int i, mntsize;

  if (!obj->data.s) return 0;

  mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
  for (i = mntsize - 1; i >= 0; i--) {
    if (strcmp(mntbuf[i].f_mntonname, obj->data.s) == 0) { return 1; }
  }

  return 0;
}

int update_meminfo(void) {
  u_int total_pages, inactive_pages, free_pages, wire_pages, active_pages,
      bufferspace, laundry_pages;
  unsigned long swap_avail, swap_free;

  int pagesize = getpagesize();

  if (GETSYSCTL("vm.stats.vm.v_page_count", total_pages)) {
    fprintf(stderr, "Cannot read sysctl \"vm.stats.vm.v_page_count\"\n");
  }

  if (GETSYSCTL("vm.stats.vm.v_free_count", free_pages)) {
    fprintf(stderr, "Cannot read sysctl \"vm.stats.vm.v_free_count\"\n");
  }

  if (GETSYSCTL("vm.stats.vm.v_inactive_count", inactive_pages)) {
    fprintf(stderr, "Cannot read sysctl \"vm.stats.vm.v_inactive_count\"\n");
  }

  if (GETSYSCTL("vm.stats.vm.v_wire_count", wire_pages)) {
    fprintf(stderr, "Cannot read sysctl \"vm.stats.vm.v_wire_count\"\n");
  }

  if (GETSYSCTL("vm.stats.vm.v_active_count", active_pages)) {
    fprintf(stderr, "Cannot read sysctl \"vm.stats.vm.v_active_count\"\n");
  }

  if (GETSYSCTL("vfs.bufspace", bufferspace)) {
    fprintf(stderr, "Cannot read sysctl \"vfs.bufspace\"\n");
  }

  if (GETSYSCTL("vm.stats.vm.v_laundry_count", laundry_pages)) {
    fprintf(stderr, "Cannot read sysctl \"vm.stats.vm.v_laundry_count\"\n");
  }

  info.memmax = total_pages * (pagesize >> 10);
  info.mem = (total_pages - free_pages - inactive_pages) * (pagesize >> 10);
  info.memwithbuffers = info.mem;
  info.memeasyfree = info.memmax - info.mem;
  info.memfree = free_pages * (pagesize >> 10);
  info.legacymem = info.mem;
  info.memwired = wire_pages * (pagesize >> 10);
  info.memactive = active_pages * (pagesize >> 10);
  info.meminactive = inactive_pages * (pagesize >> 10);
  info.memlaundry = laundry_pages * (pagesize >> 10);
  info.buffers = bufferspace / 1024;

  if ((swapmode(&swap_avail, &swap_free)) >= 0) {
    info.swapmax = swap_avail;
    info.swap = (swap_avail - swap_free);
    info.swapfree = swap_free;
  } else {
    info.swapmax = 0;
    info.swap = 0;
    info.swapfree = 0;
  }

  return 0;
}

int update_net_stats(void) {
  struct net_stat *ns;
  double delta;
  long long r, t, last_recv, last_trans;
  struct ifaddrs *ifap, *ifa;
  struct if_data *ifd;

  /* get delta */
  delta = current_update_time - last_update_time;
  if (delta <= 0.0001) { return 0; }

  if (getifaddrs(&ifap) < 0) { return 0; }

  for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
    ns = get_net_stat((const char *)ifa->ifa_name, nullptr, NULL);

    if (ifa->ifa_flags & IFF_UP) {
      struct ifaddrs *iftmp;

      ns->up = 1;
      last_recv = ns->recv;
      last_trans = ns->trans;

      if (ifa->ifa_addr->sa_family != AF_LINK) { continue; }

      for (iftmp = ifa->ifa_next;
           iftmp != nullptr && strcmp(ifa->ifa_name, iftmp->ifa_name) == 0;
           iftmp = iftmp->ifa_next) {
        if (iftmp->ifa_addr->sa_family == AF_INET) {
          memcpy(&(ns->addr), iftmp->ifa_addr, iftmp->ifa_addr->sa_len);
        }
      }

      ifd = (struct if_data *)ifa->ifa_data;
      r = ifd->ifi_ibytes;
      t = ifd->ifi_obytes;

      if (r < ns->last_read_recv) {
        ns->recv += ((long long)4294967295U - ns->last_read_recv) + r;
      } else {
        ns->recv += (r - ns->last_read_recv);
      }

      ns->last_read_recv = r;

      if (t < ns->last_read_trans) {
        ns->trans += ((long long)4294967295U - ns->last_read_trans) + t;
      } else {
        ns->trans += (t - ns->last_read_trans);
      }

      ns->last_read_trans = t;

      /* calculate speeds */
      ns->recv_speed = (ns->recv - last_recv) / delta;
      ns->trans_speed = (ns->trans - last_trans) / delta;
    } else {
      ns->up = 0;
    }
  }

  freeifaddrs(ifap);
  return 0;
}

int update_total_processes(void) {
  int n_processes;

  std::lock_guard<std::mutex> guard(kvm_proc_mutex);
  kvm_getprocs(kd, KERN_PROC_ALL, 0, &n_processes);

  info.procs = n_processes;
  return 0;
}

int update_running_processes(void) {
  struct kinfo_proc *p;
  int n_processes;
  int i, cnt = 0;

  std::lock_guard<std::mutex> guard(kvm_proc_mutex);
  p = kvm_getprocs(kd, KERN_PROC_ALL, 0, &n_processes);
  for (i = 0; i < n_processes; i++) {
    if (p[i].ki_stat == SRUN) { cnt++; }
  }

  info.run_procs = cnt;
  return 0;
}

void get_cpu_count(void) {
  int cpu_count = 0;

  if (GETSYSCTL("hw.ncpu", cpu_count) == 0) {
    info.cpu_count = cpu_count;
  } else {
    fprintf(stderr, "Cannot get hw.ncpu\n");
    info.cpu_count = 0;
  }

  info.cpu_usage = (float *)malloc((info.cpu_count + 1) * sizeof(float));
  if (info.cpu_usage == nullptr) { CRIT_ERR(nullptr, NULL, "malloc"); }
}

struct cpu_info {
  long oldtotal;
  long oldused;
};

int update_cpu_usage(void) {
  int i, j = 0;
  long used, total;
  long *cp_time = nullptr;
  size_t cp_len;
  static struct cpu_info *cpu = nullptr;
  unsigned int malloc_cpu_size = 0;
  extern void *global_cpu;

  /* add check for !info.cpu_usage since that mem is freed on a SIGUSR1 */
  if ((conky_cpu_setup == 0) || (!info.cpu_usage)) {
    get_cpu_count();
    conky_cpu_setup = 1;
  }

  if (!global_cpu) {
    malloc_cpu_size = (info.cpu_count + 1) * sizeof(struct cpu_info);
    cpu = (cpu_info *)malloc(malloc_cpu_size);
    memset(cpu, 0, malloc_cpu_size);
    global_cpu = cpu;
  }

  /* cpu[0] is overall stats, get it from separate sysctl */
  cp_len = CPUSTATES * sizeof(long);
  cp_time = (long int *)malloc(cp_len);

  if (sysctlbyname("kern.cp_time", cp_time, &cp_len, nullptr, 0) < 0) {
    fprintf(stderr, "Cannot get kern.cp_time\n");
  }

  total = 0;
  for (j = 0; j < CPUSTATES; j++) total += cp_time[j];

  used = total - cp_time[CP_IDLE];

  if ((total - cpu[0].oldtotal) != 0) {
    info.cpu_usage[0] =
        ((double)(used - cpu[0].oldused)) / (double)(total - cpu[0].oldtotal);
  } else {
    info.cpu_usage[0] = 0;
  }

  cpu[0].oldused = used;
  cpu[0].oldtotal = total;

  free(cp_time);

  /* per-core stats */
  cp_len = CPUSTATES * sizeof(long) * info.cpu_count;
  cp_time = (long int *)malloc(cp_len);

  /* on e.g. i386 SMP we may have more values than actual cpus; this will just
   * drop extra values */
  if (sysctlbyname("kern.cp_times", cp_time, &cp_len, nullptr, 0) < 0 &&
      errno != ENOMEM) {
    fprintf(stderr, "Cannot get kern.cp_times\n");
  }

  for (i = 0; i < (int)info.cpu_count; i++) {
    total = 0;
    for (j = 0; j < CPUSTATES; j++) total += cp_time[i * CPUSTATES + j];

    used = total - cp_time[i * CPUSTATES + CP_IDLE];

    if ((total - cpu[i + 1].oldtotal) != 0) {
      info.cpu_usage[i + 1] = ((double)(used - cpu[i + 1].oldused)) /
                              (double)(total - cpu[i + 1].oldtotal);
    } else {
      info.cpu_usage[i + 1] = 0;
    }

    cpu[i + 1].oldused = used;
    cpu[i + 1].oldtotal = total;
  }

  free(cp_time);
  return 0;
}

void free_cpu(struct text_object *) { /* no-op */
}

int update_load_average(void) {
  double v[3];

  getloadavg(v, 3);

  info.loadavg[0] = (double)v[0];
  info.loadavg[1] = (double)v[1];
  info.loadavg[2] = (double)v[2];

  return 0;
}

double get_acpi_temperature(int fd) {
  int temp;
  (void)fd;

  if (GETSYSCTL("hw.acpi.thermal.tz0.temperature", temp) == 0) {
    return KELVTOC(temp);
  } else if (GETSYSCTL("dev.cpu.0.temperature", temp) == 0) {
    return KELVTOC(temp);
  } else if (GETSYSCTL("dev.amdtemp.0.core0.sensor0", temp) == 0) {
    return KELVTOC(temp);
  }
  fprintf(stderr, "Cannot get temperature from sysctl\n");

  return 0.0;
}

static void get_battery_stats(int *battime, int *batcapacity, int *batstate,
                              int *ac) {
  if (battime && GETSYSCTL("hw.acpi.battery.time", *battime)) {
    fprintf(stderr, "Cannot read sysctl \"hw.acpi.battery.time\"\n");
  }
  if (batcapacity && GETSYSCTL("hw.acpi.battery.life", *batcapacity)) {
    fprintf(stderr, "Cannot read sysctl \"hw.acpi.battery.life\"\n");
  }
  if (batstate && GETSYSCTL("hw.acpi.battery.state", *batstate)) {
    fprintf(stderr, "Cannot read sysctl \"hw.acpi.battery.state\"\n");
  }
  if (ac && GETSYSCTL("hw.acpi.acline", *ac)) {
    fprintf(stderr, "Cannot read sysctl \"hw.acpi.acline\"\n");
  }
}

void get_battery_stuff(char *buf, unsigned int n, const char *bat, int item) {
  int battime, batcapacity, batstate, ac;
  (void)bat;

  get_battery_stats(&battime, &batcapacity, &batstate, &ac);

  if (batstate != 1 && batstate != 2 && batstate != 0 && batstate != 7)
    fprintf(stderr, "Unknown battery state %d!\n", batstate);
  else if (batstate != 1 && ac == 0)
    fprintf(stderr, "Battery charging while not on AC!\n");
  else if (batstate == 1 && ac == 1)
    fprintf(stderr, "Battery discharing while on AC!\n");

  switch (item) {
    case BATTERY_TIME:
      if (batstate == 1 && battime != -1)
        snprintf(buf, n, "%d:%2.2d", battime / 60, battime % 60);
      break;
    case BATTERY_STATUS:
      if (batstate == 1)  // Discharging
        snprintf(buf, n, "remaining (%d%%)", batcapacity);
      else
        snprintf(buf, n,
                 batstate == 2
                     ? "charging (%d%%)"
                     : (batstate == 7 ? "absent/on AC" : "charged (%d%%)"),
                 batcapacity);
      break;
    default:
      fprintf(stderr, "Unknown requested battery stat %d\n", item);
  }
}

int get_battery_perct(const char *) {
  int batcapacity;

  get_battery_stats(nullptr, &batcapacity, NULL, NULL);
  return batcapacity;
}

void get_battery_power_draw(char *buffer, unsigned int n, const char *bat) {
  int rate = 0;
  double ret = 0;

  /*
   * hw.acpi.battery.rate returns battery discharge rate in mW,
   * or -1 (according to docs, but also 0 in practice) when not discharging.
   *
   * ref. acpi_battery(4)
   */
  if (GETSYSCTL("hw.acpi.battery.rate", rate)) {
    fprintf(stderr, "Cannot read sysctl \"hw.acpi.battery.rate\"\n");
  }

  if (rate > 0) { ret = (double)rate / (double)1000; }

  snprintf(buffer, n, "%.1f", ret);
}

double get_battery_perct_bar(struct text_object *obj) {
  int batperct = get_battery_perct(obj->data.s);
  return batperct;
}

int open_acpi_temperature(const char *name) {
  (void)name;
  /* Not applicable for FreeBSD. */
  return 0;
}

void get_acpi_ac_adapter(char *p_client_buffer, size_t client_buffer_size,
                         const char *adapter) {
  int state;

  (void)adapter;  // only linux uses this

  if (!p_client_buffer || client_buffer_size <= 0) { return; }

  if (GETSYSCTL("hw.acpi.acline", state)) {
    fprintf(stderr, "Cannot read sysctl \"hw.acpi.acline\"\n");
    return;
  }

  if (state) {
    strncpy(p_client_buffer, "Running on AC Power", client_buffer_size);
  } else {
    strncpy(p_client_buffer, "Running on battery", client_buffer_size);
  }
}

void get_acpi_fan(char *p_client_buffer, size_t client_buffer_size) {
  /* not implemented */
  if (p_client_buffer && client_buffer_size > 0) {
    memset(p_client_buffer, 0, client_buffer_size);
  }
}

/* void */
char get_freq(char *p_client_buffer, size_t client_buffer_size,
              const char *p_format, int divisor, unsigned int cpu) {
  int freq;
  char *freq_sysctl;

  if (!p_client_buffer || client_buffer_size <= 0 || !p_format ||
      divisor <= 0) {
    return 0;
  }

  freq_sysctl = (char *)calloc(16, sizeof(char));
  if (freq_sysctl == nullptr) { exit(-1); }

  snprintf(freq_sysctl, 16, "dev.cpu.%d.freq", (cpu - 1));

  if (GETSYSCTL(freq_sysctl, freq) == 0) {
    snprintf(p_client_buffer, client_buffer_size, p_format,
             (float)freq / divisor);
  } else {
    snprintf(p_client_buffer, client_buffer_size, p_format, 0.0f);
  }

  free(freq_sysctl);
  return 1;
}

#if 0
void update_wifi_stats(void)
{
	struct ifreq ifr;		/* interface stats */
	struct wi_req wireq;
	struct net_stat *ns;
	struct ifaddrs *ifap, *ifa;
	struct ifmediareq ifmr;
	int s;

	/* Get iface table */
	if (getifaddrs(&ifap) < 0) {
		return;
	}

	for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
		ns = get_net_stat((const char *) ifa->ifa_name, nullptr, NULL);

		s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);

		/* Get media type */
		bzero(&ifmr, sizeof(ifmr));
		strlcpy(ifmr.ifm_name, ifa->ifa_name, IFNAMSIZ);
		if (ioctl(s, SIOCGIFMEDIA, (caddr_t) &ifmr) < 0) {
			close(s);
			return;
		}

		/* We can monitor only wireless interfaces
		 * which are not in hostap mode */
		if ((ifmr.ifm_active & IFM_IEEE80211)
				&& !(ifmr.ifm_active & IFM_IEEE80211_HOSTAP)) {
			/* Get wi status */
			bzero(&ifr, sizeof(ifr));
			strlcpy(ifr.ifr_name, ifa->ifa_name, IFNAMSIZ);
			wireq.wi_type = WI_RID_COMMS_QUALITY;
			wireq.wi_len = WI_MAX_DATALEN;
			ifr.ifr_data = (void *) &wireq;

			if (ioctl(s, SIOCGWAVELAN, (caddr_t) &ifr) < 0) {
				perror("ioctl (getting wi status)");
				exit(1);
			}

			/* wi_val[0] = quality
			 * wi_val[1] = signal
			 * wi_val[2] = noise */
			ns->linkstatus = (int) wireq.wi_val[1];
		}
cleanup:
		close(s);
	}
}
#endif

int update_diskio(void) {
  int devs_count, num_selected, num_selections, dn;
  struct device_selection *dev_select = nullptr;
  long select_generation;
  static struct statinfo statinfo_cur;
  char device_name[DEFAULT_TEXT_BUFFER_SIZE];
  struct diskio_stat *cur;
  unsigned int reads, writes;
  unsigned int total_reads = 0, total_writes = 0;

  memset(&statinfo_cur, 0, sizeof(statinfo_cur));
  statinfo_cur.dinfo = (struct devinfo *)calloc(1, sizeof(struct devinfo));
  stats.current = stats.current_read = stats.current_write = 0;

  if (devstat_getdevs(nullptr, &statinfo_cur) < 0) {
    free(statinfo_cur.dinfo);
    return 0;
  }

  devs_count = statinfo_cur.dinfo->numdevs;
  if (devstat_selectdevs(&dev_select, &num_selected, &num_selections,
                         &select_generation, statinfo_cur.dinfo->generation,
                         statinfo_cur.dinfo->devices, devs_count, nullptr, 0,
                         NULL, 0, DS_SELECT_ONLY, MAXSHOWDEVS, 1) >= 0) {
    for (dn = 0; dn < devs_count; dn++) {
      int di;
      struct devstat *dev;

      di = dev_select[dn].position;
      dev = &statinfo_cur.dinfo->devices[di];
      snprintf(device_name, DEFAULT_TEXT_BUFFER_SIZE, "%s%d",
               dev_select[dn].device_name, dev_select[dn].unit_number);

      total_reads += (reads = dev->bytes[DEVSTAT_READ] / 512);
      total_writes += (writes = dev->bytes[DEVSTAT_WRITE] / 512);
      for (cur = stats.next; cur; cur = cur->next) {
        if (cur->dev && !strcmp(device_name, cur->dev)) {
          update_diskio_values(cur, reads, writes);
          break;
        }
      }
    }
    update_diskio_values(&stats, total_reads, total_writes);

    free(dev_select);
  }

  if (statinfo_cur.dinfo->mem_ptr) { free(statinfo_cur.dinfo->mem_ptr); }
  free(statinfo_cur.dinfo);
  return 0;
}

/* While topless is obviously better, top is also not bad. */

void get_top_info(void) {
  struct kinfo_proc *p;
  struct process *proc;
  int n_processes;
  int i;

  std::lock_guard<std::mutex> guard(kvm_proc_mutex);
  p = kvm_getprocs(kd, KERN_PROC_PROC, 0, &n_processes);

  for (i = 0; i < n_processes; i++) {
    if (!(p[i].ki_flag & P_SYSTEM)) {
      proc = get_process(p[i].ki_pid);

      proc->time_stamp = g_time;
      proc->name = strndup(p[i].ki_comm, text_buffer_size.get(*state));
      proc->basename = strndup(p[i].ki_comm, text_buffer_size.get(*state));
      proc->amount = 100.0 * p[i].ki_pctcpu / FSCALE;
      proc->vsize = p[i].ki_size;
      proc->rss = (p[i].ki_rssize * getpagesize());
      /* ki_runtime is in microseconds, total_cpu_time in centiseconds.
       * Therefore we divide by 10000. */
      proc->total_cpu_time = p[i].ki_runtime / 10000;
    }
  }
}

void get_battery_short_status(char *buffer, unsigned int n, const char *bat) {
  get_battery_stuff(buffer, n, bat, BATTERY_STATUS);
  if (0 == strncmp("charging", buffer, 8)) {
    buffer[0] = 'C';
    memmove(buffer + 1, buffer + 8, n - 8);
  } else if (0 == strncmp("remaining", buffer, 9)) {
    buffer[0] = 'D';
    memmove(buffer + 1, buffer + 9, n - 9);
  } else if (0 == strncmp("charged", buffer, 7)) {
    buffer[0] = 'F';
    memmove(buffer + 1, buffer + 7, n - 7);
  } else if (0 == strncmp("absent/on AC", buffer, 12)) {
    buffer[0] = 'N';
    memmove(buffer + 1, buffer + 12, n - 12);
  }
}

int get_entropy_avail(unsigned int *val) {
  /* Not applicable for FreeBSD as it uses the yarrow prng. */
  (void)val;
  return 1;
}

int get_entropy_poolsize(unsigned int *val) {
  /* Not applicable for FreeBSD as it uses the yarrow prng. */
  (void)val;
  return 1;
}

void print_sysctlbyname(struct text_object *obj, char *p,
                        unsigned int p_max_size) {
  u_int val[3] = {0};
  char buf[256] = {""};
  size_t len = sizeof(val);
  size_t len2 = sizeof(buf);

  if (0 == strcmp(obj->data.s, "")) {
    snprintf(p, p_max_size, "%s", "sysctlbyname takes an argument");
    return;
  }

  if (0 != sysctlbyname(obj->data.s, &val, &len, NULL, 0)) {
    if (0 != sysctlbyname(obj->data.s, &buf, &len2, NULL, 0)) {
      snprintf(p, p_max_size, "%s", "");
      return;
    }
  }

  if (0 != strcmp(buf, "")) {
    snprintf(p, p_max_size, "%s", buf);
  } else {
    snprintf(p, p_max_size, "%lu", (unsigned long)val[0]);
  }
}
