lib, vtysh: Allow notification across multiple lines of failure

When reading in config files and we have failures on multiple
lines actually note the actual failure lines and return them.
This fixes an issue where we stopped counting errors after
the first one and we got missleading line numbers that
did not correspond to the actual problem.

This is fixed:
sharpd@donna ~/frr> sudo /usr/lib/frr/pimd --log=stdout -A 127.0.0.1 -f /etc/frr/pimd.conf
2018/10/11 09:41:01 PIM: VRF Created: default(0)
2018/10/11 09:41:01 PIM: pim_vrf_enable: for default
2018/10/11 09:41:01 PIM: zclient_lookup_sched_now: zclient lookup immediate connection scheduled
2018/10/11 09:41:01 PIM: zclient_lookup_new: zclient lookup socket initialized
2018/10/11 09:41:01 PIM: pimd 6.1-dev starting: vty@2611
2018/10/11 09:41:01 PIM: [EC 100663304] ERROR: No such command on config line 2: inteface lo
2018/10/11 09:41:01 PIM: [EC 100663304] ERROR: No such command on config line 3: ip igmp
2018/10/11 09:41:01 PIM: [EC 100663304] ERROR: No such command on config line 4: ip igmp join 224.1.1.1 13.13.13.2
^C2018/10/11 09:45:09 PIM: Terminating on signal SIGINT
2018/10/11 09:45:09 PIM: VRF Deletion: default(0)

Fixes: #3161
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/lib/vty.h b/lib/vty.h
index b55abf2204..efe91a568b 100644
--- a/lib/vty.h
+++ b/lib/vty.h
@@ -33,6 +33,11 @@
 #define VTY_BUFSIZ 4096
 #define VTY_MAXHIST 20
 
+struct vty_error {
+	char error_buf[VTY_BUFSIZ];
+	uint32_t line_num;
+};
+
 /* VTY struct. */
 struct vty {
 	/* File descripter of this vty. */
@@ -71,7 +76,7 @@ struct vty {
 	char *buf;
 
 	/* Command input error buffer */
-	char *error_buf;
+	struct list *error;
 
 	/* Command cursor point */
 	int cp;