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Fix Bug #79296 ZipArchive::open fails on empty file

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This commit is contained in:
Remi Collet
2020-03-19 17:31:17 +01:00
committed by Remi Collet
parent d70058a139
commit 8aab43c85d
1 changed files with 15 additions and 0 deletions
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15
ext/zip/php_zip.c
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@@ -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);