Now you can see (and even scroll!) devices

Makefile

@@ -1,6 +1,6 @@
 .PHONY: all clean
 
-CC = qcc  # ntox86-gcc
+CC = ntox86-gcc
 CXX = g++
 LFLAGS = -Wall #-Vgcc_ntox86
 LIBS = -l ncurses #-l socket
@@ -14,7 +14,7 @@ SRCS = $(SOURCE_PATH)/main.c
 
 all:
 	mkdir -p $(BIN_PATH)
-	$(CXX) $(LFLAGS) -o $(TARGET) $(SRCS) $(LIBS)
+	$(CC) $(LFLAGS) -o $(TARGET) $(SRCS) $(LIBS)
 
 $(BIN_PATH):
 	mkdir -p $(BIN_PATH)

src/main.c

@@ -2,12 +2,28 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <hw/pci.h>
+#include <string.h>
 #include <ncurses.h>
+#include <inttypes.h>
+#include <hw/pci-full.h>
 
 
+#define MAX_BUS     0xff
+#define MAX_DEV     0x1f
+#define MAX_FUNC    0x07
+
+#define MAX_KEY_COUNT 10
+
+#define CBUTTON_EXIT        KEY_F(10)
+#define CBUTTON_SELECT_UP   KEY_UP
+#define CBUTTON_SELECT_DOWN KEY_DOWN
+
 #define COLOR_PAIR_TEXT         1
 #define COLOR_PAIR_TEXT_INV     2
 
+#define TO_DEVFUNC(dev, func)   (((dev)<<3)+(func))
+
 
 typedef struct {
     int x;
@@ -19,26 +35,66 @@ typedef struct {
     int width;
 } Size;
 
+typedef struct device_t {
+    struct device_t *previous;
+    struct device_t *next;
+
+    uint8_t bus;
+    uint8_t device;
+    uint8_t function;
+
+    uint16_t vendor_id;
+    uint16_t device_id;
+    uint16_t command;
+    uint16_t status;
+    uint8_t revision;
+    uint8_t interface;
+    uint8_t subclass;
+    uint8_t class;
+} Device;
+
 
 void init(void);
 void quit(void);
+
+void update(void);
 void draw(void);
+
 void draw_devices(void);
+void draw_device(Device *d, int y, int x);
+
+void fill_devices(void);
+int devices_between(Device *device_1, Device *device_2);
+int devices_before(Device *device);
+int devices_after(Device *device);
+
+void select_up(void);
+void select_down(void);
+
 
 
 Size main_windows_size = {0, 0};
 int use_color = 0;
 
-WINDOW *wdevices;
+
+WINDOW *wdevices = NULL;
+
+Device *first_device = NULL;
+Device *last_device = NULL;
+
+Device *selected_device = NULL;
 
 
 int main(int argc, char *argv[])
 {
+    fill_devices();
+
     init();
 
+    while (1) {
         draw();
-    sleep(5);
+        update();
-
+    }
 
     quit();
 
@@ -49,7 +105,6 @@ void init(void)
 {
     srand((unsigned int)time(NULL));
     initscr();
-    nodelay(stdscr, TRUE);
     cbreak();
     curs_set(FALSE);
     keypad(stdscr, TRUE);
@@ -61,13 +116,28 @@ void init(void)
 
     if (use_color) {
         start_color();
-        init_pair(COLOR_PAIR_TEXT, COLOR_YELLOW, COLOR_BLACK);
+        init_pair(COLOR_PAIR_TEXT, COLOR_WHITE, COLOR_BLACK);
         init_pair(COLOR_PAIR_TEXT_INV, COLOR_BLACK, COLOR_WHITE);
     }
 
     wdevices = newwin(main_windows_size.height, main_windows_size.width, 0, 0);
 }
 
+void update(void)
+{
+    switch (getch()) {
+        case CBUTTON_EXIT:
+            quit();
+            break;
+        case CBUTTON_SELECT_UP:
+            select_up();
+            break;
+        case CBUTTON_SELECT_DOWN:
+            select_down();
+            break;
+    }
+}
+
 void draw(void)
 {
     draw_devices();
@@ -77,20 +147,235 @@ void draw_devices(void)
 {
     wclear(wdevices);
     box(wdevices, ACS_VLINE, ACS_HLINE);
-    if (use_color) {
+
-        wattron(wdevices, COLOR_PAIR(COLOR_PAIR_TEXT_INV));
+    int x = 2;
+    int y = 0;
+
+    mvwprintw(wdevices, y++, x, " b  d  f  vid  did comm stat re in sc  c");
+
+
+    Device *first_device_for_printing = first_device;
+    while (
+        devices_between(first_device_for_printing, selected_device) >
+                                                    main_windows_size.height-6
+    ) {
+        first_device_for_printing = first_device_for_printing->next;
     }
-    mvwprintw(wdevices, main_windows_size.height/2, main_windows_size.width/2-6, "Hallo, Welt!");
+
-    mvwprintw(wdevices, main_windows_size.height/2+1, main_windows_size.width/2-4, "(%d, %d)", main_windows_size.height, main_windows_size.width);
+    if (first_device_for_printing != first_device) {
-    if (use_color) {
+        int xx;
-        wattroff(wdevices, COLOR_PAIR(COLOR_PAIR_TEXT_INV));
+        for (xx = x; xx < main_windows_size.width-2; xx+=2) {
+            mvwprintw(wdevices, y, xx, "/\\");
         }
+        y++;
+    }
+
+    Device *d;
+    for (d = first_device_for_printing; d != NULL; d = d->next) {
+        draw_device(d, y, x);
+        y++;
+
+        if (y == main_windows_size.height-1) {
+            if (d != last_device) {
+                int xx;
+                for (xx = x; xx < main_windows_size.width-2; xx+=2) {
+                    mvwprintw(wdevices, y-1, xx, "\\/");
+                }
+            }
+            break;
+        }
+    }
+
+
+
     touchwin(wdevices);
     wrefresh(wdevices);
 }
 
+void draw_device(Device *d, int y, int x)
+{
+    if (use_color && d == selected_device) {
+        wattron(wdevices, COLOR_PAIR(COLOR_PAIR_TEXT_INV));
+    }
+
+    mvwprintw(wdevices, y, x,
+        "%2d %2d %2d %04X %04X %04X %04X %02X %02X %02X %02X",
+        d->bus, d->device, d->function, d->vendor_id, d->device_id,
+        d->command, d->status, d->revision,
+        d->interface, d->subclass, d->class);
+
+    if (use_color && d == selected_device) {
+        wattroff(wdevices, COLOR_PAIR(COLOR_PAIR_TEXT_INV));
+    }
+}
+
 void quit(void)
 {
     endwin();
     exit(0);
 }
+
+void fill_devices(void)
+{
+    if (pci_attach(0) == -1) {
+        fputs("Unable to attach PCI!", stderr);
+        exit(1);
+    }
+
+    Device *previous_device = NULL;
+    Device **next_device = &first_device;
+
+    unsigned short bus, dev, func;
+    for(bus = 0; bus <= MAX_BUS; bus++) {
+        for(dev = 0; dev <= MAX_DEV; dev++) {
+            for(func = 0; func <= MAX_FUNC; func++) {
+                struct pci_dev_info dev_info;
+                memset(&dev_info, 0, sizeof(dev_info));
+
+                dev_info.BusNumber = bus;
+                dev_info.DevFunc = TO_DEVFUNC(dev, func);
+
+                void *handleDevice = pci_attach_device(NULL, PCI_SEARCH_BUSDEV,
+                                                        0, &dev_info);
+
+                if (handleDevice != NULL) {
+                    *next_device = malloc(sizeof(Device));
+                    (*next_device)->previous = previous_device;
+                    (*next_device)->next = NULL;
+
+                    (*next_device)->bus = bus;
+                    (*next_device)->device = dev;
+                    (*next_device)->function = func;
+
+                    (*next_device)->vendor_id = 0x8086;
+                    (*next_device)->device_id = 0xA000;
+
+
+                    if (pci_read_config(
+                        handleDevice, 0x00, 1, 2,&(*next_device)->vendor_id
+                    ) != PCI_SUCCESS) {
+                        perror("Unable to get vendor_id");
+                        exit(1);
+                    }
+
+                    if (pci_read_config(
+                        handleDevice, 0x02, 1, 2, &(*next_device)->device_id
+                    ) != PCI_SUCCESS) {
+                        perror("Unable to get device_id");
+                        exit(1);
+                    }
+
+                    if (pci_read_config(
+                        handleDevice, 0x04, 1, 2, &(*next_device)->command
+                    ) != PCI_SUCCESS) {
+                        perror("Unable to get command");
+                        exit(1);
+                    }
+
+                    if (pci_read_config(
+                        handleDevice, 0x06, 1, 2, &(*next_device)->status
+                    ) != PCI_SUCCESS) {
+                        perror("Unable to get status");
+                        exit(1);
+                    }
+
+                    if (pci_read_config(
+                        handleDevice, 0x08, 1, 1, &(*next_device)->revision
+                    ) != PCI_SUCCESS) {
+                        perror("Unable to get revision");
+                        exit(1);
+                    }
+
+                    if (pci_read_config(
+                        handleDevice, 0x09, 1, 1, &(*next_device)->interface
+                    ) != PCI_SUCCESS) {
+                        perror("Unable to get interface");
+                        exit(1);
+                    }
+
+                    if (pci_read_config(
+                        handleDevice, 0x0a, 1, 1, &(*next_device)->subclass
+                    ) != PCI_SUCCESS) {
+                        perror("Unable to get subclasscode");
+                        exit(1);
+                    }
+
+                    if (pci_read_config(
+                        handleDevice, 0x0b, 1, 1, &(*next_device)->class
+                    ) != PCI_SUCCESS) {
+                        perror("Unable to get classcode");
+                        exit(1);
+                    }
+
+                    pci_detach_device(handleDevice);
+
+                    previous_device = *next_device;
+                    last_device = previous_device;
+                    next_device = &(*next_device)->next;
+                }
+            }
+        }
+    }
+
+    selected_device = first_device;
+}
+
+void select_up(void)
+{
+
+    if (selected_device != NULL && selected_device->previous != NULL) {
+        selected_device = selected_device->previous;
+    }
+}
+
+void select_down(void)
+{
+    if (selected_device != NULL && selected_device->next != NULL) {
+        selected_device = selected_device->next;
+    }
+}
+
+int devices_between(Device *device_1, Device *device_2)
+{
+    if (device_1 == NULL || device_2 == NULL || device_1 == device_2) {
+        return 0;
+    }
+
+    int i = 0;
+    Device *d = device_1->next;
+    while (d != NULL) {
+        if (d == device_2) {
+            return i;
+        }
+        i++;
+        d = d->next;
+    }
+
+    return devices_between(device_2, device_1);
+}
+
+int devices_before(Device *device)
+{
+    int i = 0;
+    if (device != NULL) {
+        Device *d;
+        for (d = device->previous; d != NULL; d = d->previous) {
+            i++;
+        }
+    }
+
+    return i;
+}
+
+int devices_after(Device *device)
+{
+    int i = 0;
+    if (device != NULL) {
+        Device *d;
+        for (d = device->next; d != NULL; d = d->next) {
+            i++;
+        }
+    }
+
+    return i;
+}