axfer: add an explanation about IRQ-based scheduling model

[android-x86/external-alsa-utils.git] / axfer / container.c

diff --git a/axfer/container.c b/axfer/container.c
index 690fe5b..6b0e42e 100644 (file)
--- a/axfer/container.c
+++ b/axfer/container.c
@@ -168,6 +168,13 @@ int container_parser_init(struct container_context *cntr,
        // Open a target descriptor.
        if (!strcmp(path, "-")) {
                cntr->fd = fileno(stdin);
+               if (isatty(cntr->fd)) {
+                       fprintf(stderr,
+                               "A terminal is referred for standard input. "
+                               "Output from any process or shell redirection "
+                               "should be referred instead.\n");
+                       return -EIO;
+               }
                err = set_nonblock_flag(cntr->fd);
                if (err < 0)
                        return err;
@@ -245,6 +252,13 @@ int container_builder_init(struct container_context *cntr,
                return -EINVAL;
        if (!strcmp(path, "-")) {
                cntr->fd = fileno(stdout);
+               if (isatty(cntr->fd)) {
+                       fprintf(stderr,
+                               "A terminal is referred for standard output. "
+                               "Input to any process or shell redirection "
+                               "should be referred instead.\n");
+                       return -EIO;
+               }
                err = set_nonblock_flag(cntr->fd);
                if (err < 0)
                        return err;