file: restore file descriptor support (fixes #14897)

modules/access/directory.c

@@ -36,16 +36,8 @@
 #include <vlc_access.h>
 #include <vlc_input_item.h>
 
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <errno.h>
-#include <unistd.h>
-#include <fcntl.h>
-
 #include <vlc_fs.h>
 #include <vlc_url.h>
-#include <vlc_strings.h>
-#include <vlc_charset.h>
 
 struct access_sys_t
 {
@@ -60,14 +52,6 @@ int DirInit (access_t *p_access, DIR *p_dir)
 {
     char *psz_base_uri;
 
-    if (!p_access->psz_filepath)
-        return VLC_EGENERIC;
-
-    if (!p_dir)
-        p_dir = vlc_opendir (p_access->psz_filepath);
-    if (p_dir == NULL)
-        return VLC_EGENERIC;
-
     if (!strcmp (p_access->psz_access, "fd"))
     {
         if (asprintf (&psz_base_uri, "fd://%s", p_access->psz_location) == -1)
@@ -81,7 +65,6 @@ int DirInit (access_t *p_access, DIR *p_dir)
         return VLC_ENOMEM;
     }
 
-
     p_access->p_sys = calloc (1, sizeof(access_sys_t));
     if (!p_access->p_sys)
     {
@@ -102,7 +85,16 @@ int DirInit (access_t *p_access, DIR *p_dir)
  *****************************************************************************/
 int DirOpen (vlc_object_t *p_this)
 {
-    return DirInit ((access_t*)p_this, NULL);
+    access_t *access = (access_t *)p_this;
+
+    if (access->psz_filepath == NULL)
+        return VLC_EGENERIC;
+
+    DIR *dir = vlc_opendir (access->psz_filepath);
+    if (dir == NULL)
+        return VLC_EGENERIC;
+
+    return DirInit (access, dir);
 }
 
 /*****************************************************************************
@@ -119,83 +111,31 @@ void DirClose( vlc_object_t * p_this )
     free (p_sys);
 }
 
-static bool is_looping(access_t *p_access, const char *psz_uri)
-{
-#ifdef S_ISLNK
-    struct stat st;
-    bool b_looping = false;
-
-    if (vlc_lstat (psz_uri, &st) != 0)
-        return false;
-    if (S_ISLNK (st.st_mode))
-    {
-        char *psz_link = malloc(st.st_size + 1);
-        ssize_t i_ret;
-
-        if (psz_link)
-        {
-            i_ret = readlink(psz_uri, psz_link, st.st_size + 1);
-            if (i_ret > 0 && i_ret <= st.st_size)
-            {
-                psz_link[i_ret] = '\0';
-                if (strstr(p_access->psz_filepath, psz_link))
-                    b_looping = true;
-            }
-            free (psz_link);
-        }
-    }
-    return b_looping;
-#else
-    VLC_UNUSED(p_access);
-    VLC_UNUSED(psz_uri);
-    return false;
-#endif
-}
-
 input_item_t* DirRead (access_t *p_access)
 {
     access_sys_t *p_sys = p_access->p_sys;
-    DIR *p_dir = p_sys->p_dir;
-    input_item_t *p_item = NULL;
-    const char *psz_entry;
-
-    while (!p_item && (psz_entry = vlc_readdir (p_dir)))
-    {
-        char *psz_uri, *psz_encoded_entry;
-        struct stat st;
-        int i_type;
+    const char *entry;
 
-        /* Check if it is a directory or even readable */
-        if (asprintf (&psz_uri, "%s/%s",
-                      p_access->psz_filepath, psz_entry) == -1)
-            return NULL;
-        if (vlc_stat (psz_uri, &st) != 0)
-        {
-            free (psz_uri);
-            continue;
-        }
-        i_type = S_ISDIR (st.st_mode) ? ITEM_TYPE_DIRECTORY : ITEM_TYPE_FILE;
-        if (i_type == ITEM_TYPE_DIRECTORY && is_looping(p_access, psz_uri))
+    while ((entry = vlc_readdir (p_sys->p_dir)) != NULL)
     {
-            free (psz_uri);
-            continue;
-        }
-        free (psz_uri);
-
         /* Create an input item for the current entry */
-        psz_encoded_entry = encode_URI_component (psz_entry);
-        if (psz_encoded_entry == NULL)
-            continue;
-        if (asprintf (&psz_uri, "%s/%s",
-                      p_sys->psz_base_uri, psz_encoded_entry) == -1)
+        char *encoded_entry = encode_URI_component (entry);
+        if (unlikely(entry == NULL))
             return NULL;
-        free (psz_encoded_entry);
 
-        p_item = input_item_NewWithType (psz_uri, psz_entry,
-                                         0, NULL, 0, 0, i_type);
-        free (psz_uri);
-        if (!p_item)
+        char *uri;
+        if (unlikely(asprintf (&uri, "%s/%s", p_sys->psz_base_uri,
+                               encoded_entry) == -1))
+            uri = NULL;
+        free (encoded_entry);
+        if (unlikely(uri == NULL))
             return NULL;
+
+        input_item_t *item = input_item_NewWithType (uri, entry, 0, NULL, 0, 0,
+                                                     ITEM_TYPE_FILE);
+        free (uri);
+        if (likely(item != NULL))
+            return item;
     }
-    return p_item;
+    return NULL;
 }

modules/access/file.c

@@ -163,23 +163,24 @@ int FileOpen( vlc_object_t *p_this )
     }
     else
     {
-        const char *path = p_access->psz_filepath;
-
-        if (unlikely(path == NULL))
+        if (unlikely(p_access->psz_filepath == NULL))
             return VLC_EGENERIC;
-        msg_Dbg (p_access, "opening file `%s'", path);
-        fd = vlc_open (path, O_RDONLY | O_NONBLOCK);
+        fd = vlc_open (p_access->psz_filepath, O_RDONLY | O_NONBLOCK);
+    }
+
     if (fd == -1)
     {
-            msg_Err (p_access, "cannot open file %s (%s)", path,
+        msg_Err (p_access, "cannot open file %s (%s)",
+                 p_access->psz_filepath ? p_access->psz_filepath
+                                        : p_access->psz_location,
                  vlc_strerror_c(errno));
         dialog_Fatal (p_access, _("File reading failed"),
-                          _("VLC could not open the file \"%s\" (%s)."), path,
+                      _("VLC could not open the file \"%s\" (%s)."),
+                      p_access->psz_filepath ? p_access->psz_filepath
+                                             : p_access->psz_location,
                       vlc_strerror(errno));
-        }
-    }
-    if (fd == -1)
         return VLC_EGENERIC;
+    }
 
     struct stat st;
     if (fstat (fd, &st))