[RFC iproute2-next 15/16] man: add documentation for json and pretty flags

[Stephen Hemminger <stephen@networkplumber.org>]

New options were added without documentation or usage.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 ip/ip.c       |  4 ++--
 man/man8/ip.8 | 18 ++++++++++++++----
 man/man8/tc.8 |  3 ++-
 3 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/ip/ip.c b/ip/ip.c
index a6611292808d..233a9d772492 100644
--- a/ip/ip.c
+++ b/ip/ip.c
@@ -54,12 +54,12 @@ static void usage(void)
 "                   netns | l2tp | fou | macsec | tcp_metrics | token | netconf | ila |\n"
 "                   vrf | sr }\n"
 "       OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] | -r[esolve] |\n"
-"                    -h[uman-readable] | -iec |\n"
+"                    -h[uman-readable] | -iec | -j[son] | -p[retty] |\n"
 "                    -f[amily] { inet | inet6 | ipx | dnet | mpls | bridge | link } |\n"
 "                    -4 | -6 | -I | -D | -B | -0 |\n"
 "                    -l[oops] { maximum-addr-flush-attempts } | -br[ief] |\n"
 "                    -o[neline] | -t[imestamp] | -ts[hort] | -b[atch] [filename] |\n"
-"                    -rc[vbuf] [size] | -n[etns] name | -a[ll] | -c[olor]}\n");
+"                    -rc[vbuf] [size] | -n[etns] name | -a[ll] | -c[olor]}\n");
 	exit(-1);
 }
 
diff --git a/man/man8/ip.8 b/man/man8/ip.8
index 7f26582db795..0087d18b7470 100644
--- a/man/man8/ip.8
+++ b/man/man8/ip.8
@@ -48,9 +48,10 @@ ip \- show / manipulate routing, network devices, interfaces and tunnels
 \fB\-ts\fR[\fIhort\fR] |
 \fB\-n\fR[\fIetns\fR] name |
 \fB\-a\fR[\fIll\fR] |
-\fB\-c\fR[\fIolor\fR]
-\fB\-br\fR[\fIief\fR] }
-
+\fB\-c\fR[\fIolor\fR] |
+\fB\-br\fR[\fIief\fR] |
+\fB\-j\fR[son\fR] |
+\fB\-p\fR[retty\fR] }
 
 .SH OPTIONS
 
@@ -208,10 +209,19 @@ Set the netlink socket receive buffer size, defaults to 1MB.
 print human readable rates in IEC units (e.g. 1Ki = 1024).
 
 .TP
-.BR "\-br" , "\-brief"
+.BR "\-br" , " \-brief"
 Print only basic information in a tabular format for better readability. This option is currently only supported by
 .BR "ip addr show " and " ip link show " commands.
 
+.TP
+.BR "\-j", " \-json"
+Output results in JavaScript Object Notation (JSON).
+
+.TP
+.BR "\-p", " \-pretty"
+The default JSON format is compact and more efficient to parse but hard for most users to read.
+This flag adds indentation for readability.
+
 .SH IP - COMMAND SYNTAX
 
 .SS
diff --git a/man/man8/tc.8 b/man/man8/tc.8
index 5ffea373d18b..a58f46542340 100644
--- a/man/man8/tc.8
+++ b/man/man8/tc.8
@@ -670,7 +670,8 @@ output raw hex values for handles.
 
 .TP
 .BR "\-p", " \-pretty"
-decode filter offset and mask values to equivalent filter commands based on TCP/IP.
+for u32 filter, decode offset and mask values to equivalent filter commands based on TCP/IP.
+In JSON output, add whitespace to improve readability.
 
 .TP
 .BR "\-iec"
-- 
2.15.1