devscan and stuff

1 files changed, 65 insertions, 0 deletions

diff --git a/sbin/devscan/devscan.c b/sbin/devscan/devscan.c
new file mode 100644
index 0000000..f3f10b4
--- /dev/null
+++ b/sbin/devscan/devscan.c
@@ -0,0 +1,65 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <sys/sysmacros.h>
+#include <sys/mount.h>
+
+void create_block_device(const char *name, int major, int minor) {
+    char path[256];
+    snprintf(path, sizeof(path), "/dev/%s", name);
+
+    if (mknod(path, S_IFBLK | 0660, makedev(major, minor)) < 0) {
+        perror("mknod");
+    } else {
+        printf("Created %s (major %d, minor %d)\n", path, major, minor);
+    }
+}
+
+void scan_and_create_devices() {
+    DIR *dir = opendir("/sys/block/");
+    if (!dir) {
+        // perror("opendir /sys/block");
+        return;
+    }
+
+    struct dirent *entry;
+    while ((entry = readdir(dir))) {
+        if (entry->d_name[0] == '.') continue;  // Skip "." and ".."
+
+        char sys_path[256];
+        snprintf(sys_path, sizeof(sys_path), "/sys/block/%s/dev", entry->d_name);
+
+        FILE *f = fopen(sys_path, "r");
+        if (!f) continue;
+
+        int major, minor;
+        if (fscanf(f, "%d:%d", &major, &minor) == 2) {
+            create_block_device(entry->d_name, major, minor);
+        }
+
+        fclose(f);
+    }
+
+    closedir(dir);
+}
+
+int main() {
+    mount("devtmpfs", "/dev", "devtmpfs", 0, NULL);
+    mkdir("/sys", 0755);
+    mount("sysfs", "/sys", "sysfs", 0, NULL);
+    mkdir("/dev", 0755);
+    // create_block_device("sda", 8, 0);
+    // create_block_device("sda1", 8, 1);
+    // create_block_device("sda2", 8, 2);
+    // create_block_device("sdb", 8, 16);
+    // create_block_device("sdb1", 8, 17);
+    // create_block_device("sdb2", 8, 18);
+    while (1) {
+        scan_and_create_devices();
+        sleep(10);  // Check every 10 seconds
+    }    
+}