rename from different drives and list drives

src/internal.c

@@ -7093,6 +7093,7 @@ void clean_path(char* path)
 
 #ifdef WOLFSSL_NUCLEUS
         sz = WSTRLEN(path);
+
         if (path[sz - 1] == ':') {
             path[sz] = WS_DELIM;
             path[sz + 1] = '\0';
@@ -7115,6 +7116,14 @@ void clean_path(char* path)
                 }
             }
         }
+
+        /* remove leading '/' for nucleus. Preserve case of single "/" */
+        sz = WSTRLEN(path);
+        while (sz > 2 && path[0] == WS_DELIM) {
+            sz--;
+            WMEMMOVE(path, path + 1, sz);
+            path[sz] = '\0';
+        }
 #endif
         /* remove trailing delimiter */
         if (sz > 3 && path[sz - 1] == WS_DELIM) {

src/wolfsftp.c

@@ -945,11 +945,39 @@ static int wolfSSH_SFTPNAME_readdir(WOLFSSH* ssh, WDIR* dir, WS_SFTPNAME* out,
         char* dirName)
 {
     int sz;
+    byte special = 0;
+    int ret = WS_SUCCESS;
 
     if (dir == NULL || ssh == NULL || out == NULL) {
         return WS_BAD_ARGUMENT;
     }
 
+    /* special case of getting drives at "/" */
+    if (WSTRLEN(dirName) < 3 && dirName[0] == WS_DELIM) {
+        unsigned int idx = dir->fsize; /* index of current drive */
+        MNT_LIST_S* list = NU_NULL;
+
+        if (NU_List_Mount(&list) != NU_SUCCESS) {
+            return WS_FATAL_ERROR;
+        }
+
+        for (; idx > 0 && list != NU_NULL; idx--) list = list->next;
+        if (list == NULL) {
+            return WS_FATAL_ERROR;
+        }
+
+        if (list->next == NULL) {
+            ret = WS_NEXT_ERROR;
+        }
+
+        dir->lfname[0] =  list->mnt_name[0];
+        dir->lfname[1] =  ':';
+        dir->lfname[2] =  '/';
+        dir->lfname[3] =  '\0';
+        dir->fsize++;
+        special = 1;
+    }
+
     /* use long name on Nucleus because sfname has only the file name and in all
      * caps */
     sz = (int)WSTRLEN(dir->lfname);
@@ -981,13 +1009,16 @@ static int wolfSSH_SFTPNAME_readdir(WOLFSSH* ssh, WDIR* dir, WS_SFTPNAME* out,
             return WS_MEMORY_E;
         }
         buf[0] = '\0';
-        WSTRNCAT(buf, dirName, bufSz);
+        if (!special) { /* do not add dir name in special case */
-        tmpSz = WSTRLEN(buf);
+            WSTRNCAT(buf, dirName, bufSz);
+            tmpSz = WSTRLEN(buf);
+
+            /* add delimiter between path and file/dir name */
+            if (tmpSz + 1 < bufSz) {
+                buf[tmpSz] = WS_DELIM;
+                buf[tmpSz+1] = '\0';
+            }
 
-        /* add delimiter between path and file/dir name */
-        if (tmpSz + 1 < bufSz) {
-            buf[tmpSz] = WS_DELIM;
-            buf[tmpSz+1] = '\0';
         }
         WSTRNCAT(buf, out->fName, bufSz);
 
@@ -998,11 +1029,11 @@ static int wolfSSH_SFTPNAME_readdir(WOLFSSH* ssh, WDIR* dir, WS_SFTPNAME* out,
         WFREE(buf, out->heap, DYNTYPE_SFTP);
     }
 
-    if ((WREADDIR(dir)) == NULL) {
+    if (!special && (WREADDIR(dir)) == NULL) {
-        return WS_NEXT_ERROR;
+        ret = WS_NEXT_ERROR;
     }
 
-    return WS_SUCCESS;
+    return ret;
 }
 #else
 /* helper function that gets file information from reading directory
@@ -1836,6 +1867,13 @@ int SFTP_GetAttributes(const char* fileName, WS_SFTP_FILEATRB* atr, byte link)
         return WS_SUCCESS;
     }
 
+    /* handle case of "/" */
+    if (sz < 3 && fileName[0] == WS_DELIM && ret == NUF_NOFILE) {
+        atr->flags |= WOLFSSH_FILEATRB_PERM;
+        atr->per |= 0x4000;
+        return WS_SUCCESS;
+    }
+
     if (ret != NU_SUCCESS) {
         return WS_BAD_FILE_E;
     }

wolfssh/port.h

@@ -206,7 +206,71 @@ extern "C" {
     #define WSTAT(p,b)  NU_Get_First((b),(p))
     #define WLSTAT(p,b) NU_Get_First((b),(p))
     #define WREMOVE(d)   NU_Delete((d))
-    #define WRENAME(o,n) NU_Rename((o),(n))
+
+#ifndef WS_MAX_RENAME_BUF
+#define WS_MAX_RENAME_BUF 256
+#endif
+
+    static inline int wRename(char* o, char* n)
+    {
+        int ret;
+
+        if (o == NULL || n == NULL) {
+            return NUF_BADPARM;
+        }
+
+        ret = NU_Rename(o, n);
+
+        /* try to handle case of from one drive to another */
+        if (ret == NUF_BADPARM && o[0] != n[0]) {
+            WFILE* fOld;
+            WFILE* fNew;
+            unsigned char buf[WS_MAX_RENAME_BUF];
+
+            if ((ret = WFOPEN(&fOld, o, "rb")) != 0) {
+                return ret;
+            }
+
+            if ((ret = WFOPEN(&fNew, n, "rwb")) != 0) {
+                WFCLOSE(fOld);
+                return ret;
+            }
+
+            /* read from the file in chunks and write chunks to new file */
+            do {
+                ret = WFREAD(buf, 1, WS_MAX_RENAME_BUF, fOld);
+                if (ret > 0) {
+                    if ((WFWRITE(buf, 1, ret, fNew)) != ret) {
+                        WFCLOSE(fOld);
+                        WFCLOSE(fNew);
+                        WREMOVE(n);
+                        return NUF_BADPARM;
+                    }
+                }
+            } while (ret > 0);
+
+            if (WFTELL(fOld) == WFSEEK(fOld, 0, WSEEK_END)) {
+                /* wrote everything from file */
+                WFCLOSE(fOld);
+                WREMOVE(o);
+                WFCLOSE(fNew);
+            }
+            else {
+                /* unable to write everything to file */
+                WFCLOSE(fNew);
+                WREMOVE(n);
+                WFCLOSE(fOld);
+                return NUF_BADPARM;
+            }
+
+            return 0;
+        }
+
+        /* not special case so just return value from NU_Rename */
+        return ret;
+    }
+
+    #define WRENAME(o,n) wRename((o),(n))
     #define WFD int
 
 #ifndef WGETCWD
@@ -287,6 +351,12 @@ extern "C" {
         int idx = WSTRLEN(dir);
         char tmp[256]; /* default max file name size */
 
+        /* handle special case at "/" to list all drives */
+        if (idx < 3 && dir[0] == WS_DELIM) {
+            d->fsize = 0; /* used to count number of drives */
+            return NU_SUCCESS;
+        }
+
         if (idx < 3) {
             return -1;
         }