[RFC PATCH 3/6] telemetry: use json string function for string outputs

[Bruce Richardson <bruce.richardson@intel.com>]

When returning just a string in response to a query, use the proper json
string printing function to escape characters rather than just snprintf.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 lib/telemetry/telemetry.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/lib/telemetry/telemetry.c b/lib/telemetry/telemetry.c
index c6fd03a5ab..7188b1905c 100644
--- a/lib/telemetry/telemetry.c
+++ b/lib/telemetry/telemetry.c
@@ -232,9 +232,14 @@ output_json(const char *cmd, const struct rte_tel_data *d, int s)
 				MAX_CMD_LEN, cmd ? cmd : "none");
 		break;
 	case RTE_TEL_STRING:
-		used = snprintf(out_buf, sizeof(out_buf), "{\"%.*s\":\"%.*s\"}",
-				MAX_CMD_LEN, cmd,
-				RTE_TEL_MAX_SINGLE_STRING_LEN, d->data.str);
+		prefix_used = snprintf(out_buf, sizeof(out_buf), "{\"%.*s\":",
+				MAX_CMD_LEN, cmd);
+		cb_data_buf = &out_buf[prefix_used];
+		buf_len = sizeof(out_buf) - prefix_used - 1; /* space for '}' */
+
+		used = rte_tel_json_str(cb_data_buf, buf_len, 0, d->data.str);
+		used += prefix_used;
+		used += strlcat(out_buf + used, "}", sizeof(out_buf) - used);
 		break;
 	case RTE_TEL_DICT:
 		prefix_used = snprintf(out_buf, sizeof(out_buf), "{\"%.*s\":",
-- 
2.34.1