Battary (NetBSD): some basic investigation of acpi battery detection

CMakeLists.txt

@@ -698,7 +698,7 @@ elseif(NetBSD)
         src/common/networking_linux.c
         src/common/processing_linux.c
         src/common/sysctl.c
-        src/detection/battery/battery_nosupport.c
+        src/detection/battery/battery_nbsd.c
         src/detection/bios/bios_nbsd.c
         src/detection/bluetooth/bluetooth_linux.c
         src/detection/bluetoothradio/bluetoothradio_linux.c
@@ -1486,6 +1486,7 @@ elseif(OpenBSD)
 elseif(NetBSD)
     target_link_libraries(libfastfetch
         PRIVATE "m"
+        PRIVATE "prop"
     )
 elseif(SunOS)
     target_link_libraries(libfastfetch

src/detection/battery/battery_nbsd.c

@@ -0,0 +1,42 @@
+#include "fastfetch.h"
+#include "battery.h"
+#include "common/io/io.h"
+
+#include <sys/envsys.h>
+#include <prop/proplib.h>
+#include <paths.h>
+#include <time.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+const char* ffDetectBattery(FFBatteryOptions* options, FFlist* results)
+{
+    FF_AUTO_CLOSE_FD int fd = open(_PATH_SYSMON, O_RDONLY);
+    if (fd < 0) return "open(_PATH_SYSMON, O_RDONLY) failed";
+
+    prop_dictionary_t root = NULL;
+    if (prop_dictionary_recv_ioctl(fd, ENVSYS_GETDICTIONARY, &root) < 0)
+        return "prop_dictionary_recv_ioctl(ENVSYS_GETDICTIONARY) failed";
+
+    prop_array_t array = prop_dictionary_get(root, "acpiacad0");
+    if (!array)
+        return "No key `acpibat0` in root dictionary";
+
+    if (prop_array_count(array) != 2)
+        return "Unexpect `acpibat0` data";
+
+    prop_dictionary_t dict = prop_array_get(array, 0);
+    if (prop_object_type(dict) != PROP_TYPE_DICTIONARY)
+        return "Unexpect `acpibat0[0]`";
+
+    //prop_array_t keys = prop_dictionary_all_keys(dict);
+    //for (uint32_t i = 0; i < prop_array_count(keys); ++i)
+    //    puts(prop_dictionary_keysym_value(prop_array_get(keys, i)));
+
+    int acConnected = false;
+    prop_dictionary_get_int(dict, "cur-value", &acConnected);
+
+    // TODO: actually use acpibat0
+
+    return acConnected ? "AC Connected" : "Discharging";
+}