tee: fix infinite looping on open error (echo asd | tee "")

1 files changed, 3 insertions, 1 deletions

diff --git a/coreutils/tee.c b/coreutils/tee.c
index 8a4128591..dc947c935 100644
--- a/coreutils/tee.c
+++ b/coreutils/tee.c
@@ -55,12 +55,14 @@ int tee_main(int argc, char **argv)
                         *fp = fopen_or_warn(*argv, mode);
                         if (*fp == NULL) {
                                 retval = EXIT_FAILURE;
+                                argv++;
                                 continue;
                         }
                 }
                 *np = *argv++;
  GOT_NEW_FILE:
-                setbuf(*fp++, NULL);    /* tee must not buffer output. */
+                setbuf(*fp, NULL);      /* tee must not buffer output. */
+                fp++;
                 np++;
         } while (*argv);
         /* names[0] will be filled later */