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

diff --git a/coreutils/tee.c b/coreutils/tee.c
index 8a41285..dc947c9 100644 (file)
--- 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 */