0 is indeed considered a valid file descriptor (issue #7861 reported by PCadach)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@41694 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/main/file.c b/main/file.c
index 5bafcfe..6cacdc8 100644 (file)
--- a/main/file.c
+++ b/main/file.c
@@ -1002,7 +1002,7 @@ static int waitstream_core(struct ast_channel *c, const char *breakon,
                }
                if (ms < 0)
                        ms = 1000;
-               if (!cmdfd) {
+               if (cmdfd > -1) {
                        res = ast_waitfor(c, ms);
                        if (res < 0) {
                                ast_log(LOG_WARNING, "Select failed (%s)\n", strerror(errno));