Add create_file syscall, CE mkfile command, FatFS formatting fixes

ce/ce.c

@@ -19,7 +19,7 @@ static struct arena arena;
 #define LINE_BUFFER_MAX 1024
 #define TOKEN_MAX       64
 #define CMD_ARGS_MAX    64
-#define PROMPT          "ce $ "
+#define PROMPT          "$ "
 
 #define TOKEN_CLASS_OPAREN    0
 #define TOKEN_CLASS_CPAREN    1
@@ -235,7 +235,31 @@ static void parse_tokens (struct list_node_link* tokens) {
 
 static void echo (char** strings, size_t strings_count) {
   for (size_t i = 0; i < strings_count; i++)
-    printf ("%s\n", strings[i]);
+    printf ("%s ", strings[i]);
+}
+
+static void mkfile (char** file_paths, size_t files_count) {
+  char volume[VOLUME_MAX];
+  const char* path;
+  int ret;
+
+  for (size_t i = 0; i < files_count; i++) {
+    const char* file_path = file_paths[i];
+
+    if (!path_parse (file_path, volume, &path)) {
+      printf ("ERROR bad path '%s'\n", file_path);
+      continue;
+    }
+
+    if ((ret = volume_open (volume)) < 0) {
+      printf ("ERROR could not open volume '%s': %s\n", volume, str_status[-ret]);
+      continue;
+    }
+
+    create_file (path);
+
+    volume_close ();
+  }
 }
 
 static void cat (char** file_paths, size_t files_count) {
@@ -328,6 +352,7 @@ static void help (void) {
   printf ("help\n");
   printf ("cat <file path>\n");
   printf ("ls <directory path>\n");
+  printf ("mkfile <file path>\n");
   printf ("quit\n");
 }
 
@@ -342,6 +367,8 @@ static void execute_cmd (struct ast_cmd* cmd) {
     ls (cmd->args[0]);
   } else if (strcmp (cmd->name, "quit") == 0) {
     quit1 ();
+  } else if (strcmp (cmd->name, "mkfile") == 0) {
+    mkfile (cmd->args, cmd->arg_count);
   } else {
     printf ("ERROR unknown command '%s'\n", cmd->name);
   }