From 8aab43c85d67fc1c1935f91bc64db800c4ef4754 Mon Sep 17 00:00:00 2001 From: Remi Collet Date: Thu, 19 Mar 2020 17:31:17 +0100 Subject: Fix Bug #79296 ZipArchive::open fails on empty file --- ext/zip/php_zip.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/ext/zip/php_zip.c b/ext/zip/php_zip.c index f65f70621e..48af712b9c 100644 --- a/ext/zip/php_zip.c +++ b/ext/zip/php_zip.c @@ -1480,6 +1480,21 @@ static ZIPARCHIVE_METHOD(open) ze_obj->filename = NULL; } +#if LIBZIP_VERSION_MAJOR > 1 || LIBZIP_VERSION_MAJOR == 1 && LIBZIP_VERSION_MINOR >= 6 + /* reduce BC break introduce in libzip 1.6.0 + "Do not accept empty files as valid zip archives any longer" */ + + /* open for write without option to empty the archive */ + if ((flags & (ZIP_TRUNCATE | ZIP_RDONLY)) == 0) { + zend_stat_t st; + + /* exists and is empty */ + if (VCWD_STAT(resolved_path, &st) == 0 && st.st_size == 0) { + flags |= ZIP_TRUNCATE; + } + } +#endif + intern = zip_open(resolved_path, flags, &err); if (!intern || err) { efree(resolved_path); -- cgit v1.2.1