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-rw-r--r--tar/sqfs2tar.c57
1 files changed, 40 insertions, 17 deletions
diff --git a/tar/sqfs2tar.c b/tar/sqfs2tar.c
index 6e22621..4d31fbe 100644
--- a/tar/sqfs2tar.c
+++ b/tar/sqfs2tar.c
@@ -297,20 +297,47 @@ fail:
return -1;
}
-static char *prepend_prefix(char *name)
+static char *assemble_tar_path(char *name, bool is_dir)
{
- size_t len = strlen(root_becomes);
- char *temp = realloc(name, strlen(name) + len + 2);
+ size_t len, new_len;
+ char *temp;
+ (void)is_dir;
+ if (root_becomes == NULL && !is_dir)
+ return name;
+
+ new_len = strlen(name);
+ if (root_becomes != NULL)
+ new_len += strlen(root_becomes) + 1;
+ if (is_dir)
+ new_len += 1;
+
+ temp = realloc(name, new_len + 1);
if (temp == NULL) {
perror("assembling tar entry filename");
+ free(name);
return NULL;
}
name = temp;
- memmove(name + len + 1, name, strlen(name) + 1);
- memcpy(name, root_becomes, len);
- name[len] = '/';
+
+ if (root_becomes != NULL) {
+ len = strlen(root_becomes);
+
+ memmove(name + len + 1, name, strlen(name) + 1);
+ memcpy(name, root_becomes, len);
+ name[len] = '/';
+ }
+
+ if (is_dir) {
+ len = strlen(name);
+
+ if (len == 0 || name[len - 1] != '/') {
+ name[len++] = '/';
+ name[len] = '\0';
+ }
+ }
+
return name;
}
@@ -366,11 +393,9 @@ static int write_tree_dfs(const sqfs_tree_node_t *n)
}
}
- if (root_becomes != NULL) {
- name = prepend_prefix(name);
- if (name == NULL)
- return -1;
- }
+ name = assemble_tar_path(name, n->children != NULL);
+ if (name == NULL)
+ return -1;
}
inode_stat(n, &sb);
@@ -636,12 +661,10 @@ int main(int argc, char **argv)
if (sqfs_tree_find_hard_links(root, &links))
goto out_tree;
- if (root_becomes != NULL) {
- for (lnk = links; lnk != NULL; lnk = lnk->next) {
- lnk->target = prepend_prefix(lnk->target);
- if (lnk->target == NULL)
- goto out;
- }
+ for (lnk = links; lnk != NULL; lnk = lnk->next) {
+ lnk->target = assemble_tar_path(lnk->target, false);
+ if (lnk->target == NULL)
+ goto out;
}
}