netdev - [PATCH] tc: print errors on stderr

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Message-Id: <20221210034736.90666-1-stephen@networkplumber.org>
Date:   Fri,  9 Dec 2022 19:47:36 -0800
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     netdev@...r.kernel.org
Cc:     Stephen Hemminger <stephen@...workplumber.org>
Subject: [PATCH] tc: print errors on stderr

Don't mix output and errors.

Signed-off-by: Stephen Hemminger <stephen@...workplumber.org>
---
 tc/tc_class.c   | 2 +-
 tc/tc_monitor.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tc/tc_class.c b/tc/tc_class.c
index b3e7c92491e0..1297d152fd5f 100644
--- a/tc/tc_class.c
+++ b/tc/tc_class.c
@@ -365,7 +365,7 @@ int print_class(struct nlmsghdr *n, void *arg)
 		if (q && q->print_copt)
 			q->print_copt(q, fp, tb[TCA_OPTIONS]);
 		else
-			fprintf(fp, "[cannot parse class parameters]");
+			fprintf(stderr, "[cannot parse class parameters]");
 	}
 	fprintf(fp, "\n");
 	if (show_stats) {
diff --git a/tc/tc_monitor.c b/tc/tc_monitor.c
index c279a4a1a898..64f31491607e 100644
--- a/tc/tc_monitor.c
+++ b/tc/tc_monitor.c
@@ -67,7 +67,7 @@ static int accept_tcmsg(struct rtnl_ctrl_data *ctrl,
 	}
 	if (n->nlmsg_type != NLMSG_ERROR && n->nlmsg_type != NLMSG_NOOP &&
 	    n->nlmsg_type != NLMSG_DONE) {
-		fprintf(fp, "Unknown message: length %08d type %08x flags %08x\n",
+		fprintf(stderr, "Unknown message: length %08d type %08x flags %08x\n",
 			n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
 	}
 	return 0;
-- 
2.35.1