script: check that stdin is a terminal

Signed-off-by: Karel Zak <kzak@redhat.com>

diff --git a/term-utils/script.c b/term-utils/script.c
index 1de0c3a81662b82f4836e58eb60e7a674409fd5f..c18274c1c2631ae5ce179d55024f53e17d2450ef 100644 (file)
--- a/term-utils/script.c
+++ b/term-utils/script.c
@@ -229,6 +229,10 @@ main(int argc, char **argv) {
                fname = DEFAULT_OUTPUT;
                die_if_link(fname);
        }
+
+       if (!isatty(STDIN_FILENO))
+               errx(EXIT_FAILURE, _("The stdin is not a terminal."));
+
        if ((fscript = fopen(fname, aflg ? "a" : "w")) == NULL) {
                warn(_("cannot open %s"), fname);
                fail();