1 files changed, 5 insertions, 1 deletions
diff --git a/Objects/fileobject.c b/Objects/fileobject.c
index 76cdf74..d3b1cf6 100644
--- a/Objects/fileobject.c
+++ b/Objects/fileobject.c
@@ -1804,6 +1804,7 @@ file_write(PyFileObject *f, PyObject *args)
     const char *s;
     Py_ssize_t n, n2;
     PyObject *encoded = NULL;
+    int err = 0;
 
     if (f->f_fp == NULL)
         return err_closed();
@@ -1849,11 +1850,14 @@ file_write(PyFileObject *f, PyObject *args)
     FILE_BEGIN_ALLOW_THREADS(f)
     errno = 0;
     n2 = fwrite(s, 1, n, f->f_fp);
+    if (n2 != n || ferror(f->f_fp))
+        err = errno;
     FILE_END_ALLOW_THREADS(f)
     Py_XDECREF(encoded);
     if (f->f_binary)
         PyBuffer_Release(&pbuf);
-    if (n2 != n) {
+    if (err) {
+        errno = err;
         PyErr_SetFromErrno(PyExc_IOError);
         clearerr(f->f_fp);
         return NULL;