netdev - [PATCH iproute2-next 1/1] tc: add online mode

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Date:   Thu, 29 Mar 2018 18:12:35 -0400
From:   Roman Mashak <mrv@...atatu.com>
To:     dsahern@...il.com
Cc:     stephen@...workplumber.org, netdev@...r.kernel.org,
        kernel@...atatu.com, jhs@...atatu.com, xiyou.wangcong@...il.com,
        jiri@...nulli.us, Roman Mashak <mrv@...atatu.com>
Subject: [PATCH iproute2-next 1/1] tc: add online mode

Add initial support for oneline mode in tc; actions, filters and qdiscs
will be gradually updated in the follow-up patches.

Signed-off-by: Roman Mashak <mrv@...atatu.com>
---
 man/man8/tc.8 | 15 ++++++++++++++-
 tc/tc.c       |  8 +++++++-
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/man/man8/tc.8 b/man/man8/tc.8
index 3dc30ee489e5..840880fbdba6 100644
--- a/man/man8/tc.8
+++ b/man/man8/tc.8
@@ -95,7 +95,8 @@ tc \- show / manipulate traffic control settings
 \fB[ \fB-n\fR[\fIetns\fR] name \fB] \fR|
 \fB[ \fB-nm \fR| \fB-nam\fR[\fIes\fR] \fB] \fR|
 \fB[ \fR{ \fB-cf \fR| \fB-c\fR[\fIonf\fR] \fR} \fB[ filename ] \fB] \fR
-\fB[ -t\fR[imestamp\fR] \fB\] \fR| \fB[ -t\fR[short\fR] \fB]\fR }
+\fB[ -t\fR[imestamp\fR] \fB\] \fR| \fB[ -t\fR[short\fR] \fR| \fB[
+-o\fR[neline\fR] \fB]\fR }
 
 .ti 8
 .IR FORMAT " := {"
@@ -649,6 +650,18 @@ don't terminate tc on errors in batch mode.
 If there were any errors during execution of the commands, the application return code will be non zero.
 
 .TP
+.BR "\-o" , " \-oneline"
+output each record on a single line, replacing line feeds
+with the
+.B '\e'
+character. This is convenient when you want to count records
+with
+.BR wc (1)
+or to
+.BR grep (1)
+the output.
+
+.TP
 .BR "\-n" , " \-net" , " \-netns " <NETNS>
 switches
 .B tc
diff --git a/tc/tc.c b/tc/tc.c
index a31f075d1ffe..68475c156057 100644
--- a/tc/tc.c
+++ b/tc/tc.c
@@ -42,6 +42,8 @@ int force;
 bool use_names;
 int json;
 int color;
+int oneline;
+const char *_SL_;
 
 static char *conf_file;
 
@@ -191,7 +193,7 @@ static void usage(void)
 		"where  OBJECT := { qdisc | class | filter | action | monitor | exec }\n"
 		"       OPTIONS := { -s[tatistics] | -d[etails] | -r[aw] | -b[atch] [filename] | -n[etns] name |\n"
 		"                    -nm | -nam[es] | { -cf | -conf } path } |\n"
-		"                    -j[son] -p[retty] -c[olor]\n");
+		"                    -o[neline] -j[son] -p[retty] -c[olor]\n");
 }
 
 static int do_cmd(int argc, char **argv, void *buf, size_t buflen)
@@ -487,6 +489,8 @@ int main(int argc, char **argv)
 			++timestamp_short;
 		} else if (matches(argv[1], "-json") == 0) {
 			++json;
+		} else if (matches(argv[1], "-oneline") == 0) {
+			++oneline;
 		} else {
 			fprintf(stderr, "Option \"%s\" is unknown, try \"tc -help\".\n", argv[1]);
 			return -1;
@@ -494,6 +498,8 @@ int main(int argc, char **argv)
 		argc--;	argv++;
 	}
 
+	_SL_ = oneline ? "\\" : "\n";
+
 	if (color & !json)
 		enable_color();
 
-- 
2.7.4