Verify fread(), fwrite(), and system() return values

[libeap.git] / src / eap_peer / eap_fast_pac.c

diff --git a/src/eap_peer/eap_fast_pac.c b/src/eap_peer/eap_fast_pac.c
index a052ee1..0f5ef81 100644 (file)
--- a/src/eap_peer/eap_fast_pac.c
+++ b/src/eap_peer/eap_fast_pac.c
@@ -533,6 +533,8 @@ static void eap_fast_write(char **buf, char **pos, size_t *buf_len,
 static int eap_fast_write_pac(struct eap_sm *sm, const char *pac_file,
                              char *buf, size_t len)
 {
+       int ret = 0;
+
        if (os_strncmp(pac_file, "blob://", 7) == 0) {
                struct wpa_config_blob *blob;
                blob = os_zalloc(sizeof(*blob));
@@ -555,12 +557,16 @@ static int eap_fast_write_pac(struct eap_sm *sm, const char *pac_file,
                                   "file '%s' for writing", pac_file);
                        return -1;
                }
-               fwrite(buf, 1, len, f);
+               if (fwrite(buf, 1, len, f) != len) {
+                       wpa_printf(MSG_INFO, "EAP-FAST: Failed to write all "
+                                  "PACs into '%s'", pac_file);
+                       ret = -1;
+               }
                os_free(buf);
                fclose(f);
        }
 
-       return 0;
+       return ret;
 }