Cleaned up use of PATH_MAX (local filesystem) and LIBISOFS_NODE_PATH_MAX

(ISO filesystem).

libisofs/builder.c

@@ -26,10 +26,6 @@
 #include <limits.h>
 #include <stdio.h>
 
-#ifndef PATH_MAX
-#define PATH_MAX Libisofs_default_path_maX
-#endif
-
 
 
 void iso_node_builder_ref(IsoNodeBuilder *builder)
@@ -161,11 +157,10 @@ int default_create_node(IsoNodeBuilder *builder, IsoImage *image,
     case S_IFLNK:
         {
             /* source is a symbolic link */
-            char dest[PATH_MAX + LIBISOFS_NODE_PATH_MAX];
+            char dest[LIBISOFS_NODE_PATH_MAX];
             IsoSymlink *link;
 
-            ret = iso_file_source_readlink(src, dest,
-                                           PATH_MAX + LIBISOFS_NODE_PATH_MAX);
+            ret = iso_file_source_readlink(src, dest, LIBISOFS_NODE_PATH_MAX);
             if (ret < 0) {
                 break;
             }

libisofs/filesrc.c

@@ -338,7 +338,7 @@ int filesrc_writer_write_data(IsoImageWriter *writer)
     Ecma119Image *t;
     IsoFileSrc *file;
     IsoFileSrc **filelist;
-    char name[PATH_MAX + LIBISOFS_NODE_PATH_MAX];
+    char name[PATH_MAX];
     char buffer[BLOCK_SIZE];
     off_t file_size;
     uint32_t nblocks;

libisofs/fs_image.c

@@ -35,11 +35,6 @@
 #include <stdio.h>
 
 
-#ifndef PATH_MAX
-#define PATH_MAX Libisofs_default_path_maX
-#endif
-
-
 /**
  * Options for image reading.
  * There are four kind of options:
@@ -953,6 +948,7 @@ int ifs_readlink(IsoFileSource *src, char *buf, size_t bufsiz)
 {
     char *dest;
     size_t len;
+    int ret;
     ImageFileSourceData *data;
 
     if (src == NULL || buf == NULL || src->data == NULL) {
@@ -971,14 +967,15 @@ int ifs_readlink(IsoFileSource *src, char *buf, size_t bufsiz)
 
     dest = (char*)data->data.content;
     len = strlen(dest);
-    if (bufsiz <= len) {
+
+    ret = ISO_SUCCESS;
+    if (len >= bufsiz) {
+        ret = ISO_RR_PATH_TOO_LONG;
         len = bufsiz - 1;
     }
-
     strncpy(buf, dest, len);
     buf[len] = '\0';
-
-    return ISO_SUCCESS;
+    return ret;
 }
 
 static
@@ -2926,11 +2923,10 @@ int image_builder_create_node(IsoNodeBuilder *builder, IsoImage *image,
     case S_IFLNK:
         {
             /* source is a symbolic link */
-            char dest[PATH_MAX + LIBISOFS_NODE_PATH_MAX];
+            char dest[LIBISOFS_NODE_PATH_MAX];
             IsoSymlink *link;
 
-            ret = iso_file_source_readlink(src, dest,
-                                           PATH_MAX + LIBISOFS_NODE_PATH_MAX);
+            ret = iso_file_source_readlink(src, dest, LIBISOFS_NODE_PATH_MAX);
             if (ret < 0) {
                 free(name);
                 return ret;

libisofs/fs_local.c

@@ -412,7 +412,7 @@ int lfs_readdir(IsoFileSource *src, IsoFileSource **child)
 static
 int lfs_readlink(IsoFileSource *src, char *buf, size_t bufsiz)
 {
-    int size;
+    int size, ret;
     _LocalFsFileSource *data;
     char *path;
 
@@ -431,7 +431,7 @@ int lfs_readlink(IsoFileSource *src, char *buf, size_t bufsiz)
      * invoke readlink, with bufsiz -1 to reserve an space for
      * the NULL character
      */
-    size = readlink(path, buf, bufsiz - 1);
+    size = readlink(path, buf, bufsiz);
     free(path);
     if (size < 0) {
         /* error */
@@ -455,8 +455,13 @@ int lfs_readlink(IsoFileSource *src, char *buf, size_t bufsiz)
     }
 
     /* NULL-terminate the buf */
+    ret = ISO_SUCCESS;
+    if (size >= bufsiz) {
+        ret = ISO_RR_PATH_TOO_LONG;
+        size = bufsiz - 1;
+    }
     buf[size] = '\0';
-    return ISO_SUCCESS;
+    return ret;
 }
 
 static

libisofs/node.h

@@ -44,7 +44,7 @@
 
 
 /* Maximum length of a path in the libisofs node tree.
-   Rock Ridge specs do not impose an explicit limit on name length.
+   Rock Ridge specs do not impose an explicit limit on path length.
 
      http://pubs.opengroup.org/onlinepubs/009695399/basedefs/limits.h.html
    says

libisofs/stream.c

@@ -869,8 +869,8 @@ void iso_stream_get_file_name(IsoStream *stream, char *name)
     if (!strncmp(type, "fsrc", 4)) {
         FSrcStreamData *data = stream->data;
         char *path = iso_file_source_get_path(data->src);
-        strncpy(name, path, PATH_MAX + LIBISOFS_NODE_PATH_MAX - 1);
-        name[PATH_MAX + LIBISOFS_NODE_PATH_MAX - 1] = 0;
+        strncpy(name, path, PATH_MAX - 1);
+        name[PATH_MAX - 1] = 0;
         free(path);
     } else if (!strncmp(type, "boot", 4)) {
         strcpy(name, "BOOT CATALOG");

libisofs/stream.h

@@ -29,7 +29,8 @@ typedef struct
 /**
  * Get an identifier for the file of the source, for debug purposes
  * @param name
- *      Should provide at least PATH_MAX bytes
+ *      Must provide at least PATH_MAX bytes. If no PATH_MAX is defined
+ *      then assume PATH_MAX = Libisofs_default_path_maX from libisofs.h
  */
 void iso_stream_get_file_name(IsoStream *stream, char *name);
 

libisofs/tree.c

@@ -975,19 +975,24 @@ char *iso_tree_get_node_path(IsoNode *node)
     if ((IsoNode*)node->parent == node) {
         return strdup("/");
     } else {
-        char path[LIBISOFS_NODE_PATH_MAX];
-        char *parent_path = iso_tree_get_node_path((IsoNode*)node->parent);
+        char *path = NULL, *parent_path;
+        parent_path = iso_tree_get_node_path((IsoNode*)node->parent);
         if (parent_path == NULL) {
             return NULL;
         }
         if (strlen(parent_path) == 1) {
-            snprintf(path, LIBISOFS_NODE_PATH_MAX, "/%s", node->name);
+            path = calloc(1, strlen(node->name) + 2);
+            if (path == NULL)
+                return NULL;
+            sprintf(path, "/%s", node->name);
         } else {
-            snprintf(path, LIBISOFS_NODE_PATH_MAX, "%s/%s",
-                     parent_path, node->name);
+            path = calloc(1, strlen(parent_path) + strlen(node->name) + 2);
+            if (path == NULL)
+                return NULL;
+            sprintf(path, "%s/%s", parent_path, node->name);
         }
         free(parent_path);
-        return strdup(path);
+        return path;
     }
 }