fs Add tree subcommand

user/fs/tree.c

@@ -0,0 +1,59 @@
+#include <stddef.h>
+#include <stdint.h>
+#include <ulib.h>
+
+int showtree(char *root, int indent) {
+  #define INDENT() for (size_t i = 0; i < indent; i++) uprintf(" ")
+
+  IoctlStat statbuf; ZERO(&statbuf);
+  if (ioctl(IOCTL_NOHANDLE, IOCTL_STAT, (uint64_t)&statbuf, (uint64_t)root, 0) != E_OK) {
+    uprintf("fs: could not stat %s\n", root);
+    return -1;
+  }
+
+  const char *bn = path_basename(root);
+  if (string_len(bn) > 0) {
+    INDENT();
+    uprintf("%s\n", bn);
+  }
+
+
+  if (statbuf.type == IOCTLSTAT_FILE) {
+    return 0;
+  }
+  if (statbuf.type == IOCTLSTAT_DIR) {
+    IoctlDirent *dirents = (IoctlDirent *)umalloc(statbuf.size * sizeof(*dirents));
+
+    for (size_t i = 0; i < statbuf.size; i++) {
+      ioctl(IOCTL_NOHANDLE, IOCTL_FETCHDIRENT, (uint64_t)root, (uint64_t)&dirents[i], i);
+
+      IoctlDirent *dirent = &dirents[i];
+
+      if (string_strcmp(dirent->name, ".") == 0 || string_strcmp(dirent->name, "..") == 0) {
+        continue;
+      }
+
+      char tmpbuf[1024]; ZERO(tmpbuf);
+      string_strcpy(tmpbuf, root);
+      if (root[string_len(root) - 1] != '/') {
+        string_combine(tmpbuf, "/");
+      }
+      string_combine(tmpbuf, dirent->name);
+      showtree(tmpbuf, indent+1);
+    }
+
+    ufree(dirents);
+  }
+  return 0;
+}
+
+void fs_tree(void) {
+  if (argslen() < 2) {
+    uprintf("fs: Not enough arguments\n");
+    return;
+  }
+
+  char *path = *(args()+1);
+
+  showtree(path, 0);
+}