Uploading example C programs for driver article.

X. NU/custom/drivers/DKIOCEJECT_ioctl.c

@@ -0,0 +1,31 @@
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <paths.h>
+#include <sys/disk.h>
+
+int main(int argc, char *argv[]) {
+    if (argc != 2) {
+        printf("Usage: %s /dev/diskX\n", argv[0]);
+        return 1;
+    }
+
+    // Open the disk device
+    int fd = open(argv[1], O_RDWR);
+    if (fd < 0) {
+        perror("Failed to open disk device");
+        return 1;
+    }
+
+    // Attempt to eject the disk using ioctl
+    if (ioctl(fd, DKIOCEJECT, NULL) < 0) {
+        perror("Failed to eject disk");
+        close(fd);
+        return 1;
+    }
+
+    close(fd);
+    printf("Disk ejected successfully\n");
+    return 0;
+}

X. NU/custom/drivers/ifstatus.c

@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+
+int main(int argc, char *argv[]) {
+    struct ifreq ifr;
+    int sockfd;
+    
+    // Check if interface name was provided
+    if (argc != 2) {
+        printf("Usage: %s <interface>\n", argv[0]);
+        printf("Example: %s en0\n", argv[0]);
+        return 1;
+    }
+
+    // Create a UDP socket for interface communication
+    sockfd = socket(AF_INET, SOCK_DGRAM, 0);
+    if (sockfd < 0) {
+        perror("socket");
+        return 1;
+    }
+
+    // Clear the structure and copy interface name
+    memset(&ifr, 0, sizeof(ifr));
+    strncpy(ifr.ifr_name, argv[1], IFNAMSIZ-1);
+
+    // Get the interface flags
+    if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
+        perror("ioctl");
+        close(sockfd);
+        return 1;
+    }
+
+    // Print interface status
+    printf("Interface %s status:\n", argv[1]);
+    printf("UP: %s\n", (ifr.ifr_flags & IFF_UP) ? "yes" : "no");
+    printf("RUNNING: %s\n", (ifr.ifr_flags & IFF_RUNNING) ? "yes" : "no");
+    printf("LOOPBACK: %s\n", (ifr.ifr_flags & IFF_LOOPBACK) ? "yes" : "no");
+    printf("POINTOPOINT: %s\n", (ifr.ifr_flags & IFF_POINTOPOINT) ? "yes" : "no");
+    printf("MULTICAST: %s\n", (ifr.ifr_flags & IFF_MULTICAST) ? "yes" : "no");
+    printf("BROADCAST: %s\n", (ifr.ifr_flags & IFF_BROADCAST) ? "yes" : "no");
+    printf("PROMISC: %s\n", (ifr.ifr_flags & IFF_PROMISC) ? "yes" : "no");
+
+    close(sockfd);
+    return 0;
+}