How to enable libyang logs in sysrepo code?

[amitnagraj]

Hi,

I'm using sysrepo v2.2.12.

I'm trying to enable libyang logs while executing sysrepo code, but I'm not getting the logs.

C snippet:

main():
    /* turn logging on */
    sr_log_stderr(SR_LL_DBG);
    sr_log_syslog(NULL, SR_LL_DBG);

    ly_log_level(LY_LLDBG);
    ly_set_log_clb(sr_cb_ly, 1);


    /* connect to sysrepo */
    rc = sr_connect(0, &connection);
    if (rc != SR_ERR_OK) {
        goto cleanup;
    }

log callback:
void
sr_cb_ly(LY_LOG_LEVEL level, const char *msg, const char *path)
{
    if (path) {
        printf("LY %s (%s)", msg, path);
    } else {
        printf("LY %s", msg);
    }
}

Output:
root@debian10:sysrepo/examples# ./get /ibos-interfaces:interfaces/interface/config/name
Application will get "/ibos-interfaces:interfaces/interface/config/name" from "running" datastore.

[INF] Connection 8 created.
[INF] Session 5 (user "root", CID 8) created.
/ibos-interfaces:interfaces/interface[name='ethernet1/1']/config/name = ethernet1/1
/ibos-interfaces:interfaces/interface[name='ethernet1/2']/config/name = ethernet1/2
/ibos-interfaces:interfaces/interface[name='ethernet1/3']/config/name = ethernet1/3
/ibos-interfaces:interfaces/interface[name='ethernet1/4']/config/name = ethernet1/4
/ibos-interfaces:interfaces/interface[name='et1/4/vid1']/config/name = et1/4/vid1
/ibos-interfaces:interfaces/interface[name='et1/4/vid3']/config/name = et1/4/vid3
/ibos-interfaces:interfaces/interface[name='et1/5/vid2']/config/name = et1/5/vid2
/ibos-interfaces:interfaces/interface[name='et1/5/vid4']/config/name = et1/5/vid4
[INF] No datastore changes to apply.

[Michal Vasko]

Enable libyang logging with this code

    ly_log_options(LY_LOLOG | LY_LOSTORE);
    ly_log_level(LY_LLDBG);
    ly_set_log_clb(sr_cb_ly, 1);

sysrepo modifies the logging options to hide irrelevant messages (that you will see this way). I will try to improve this and not having to affect libyang logging this way.

[amitnagraj]

Thanks for the response.

Using above code I'm only getting the initial logs from libyang.

I'm trying to reproduce libyang[1]: String "et1/21/vid15" not freed from the dictionary, refcount 4 by commenting sr_free_values() from the sr_get_items_example.c, but not able to get the logs after sr_disconnect().

Logs:

Application will get "/ibos-interfaces:interfaces/interface/config/name" from "running" datastore.

LY Searching for "ietf-inet-types" in "/home/amit/latest/sysrepo/build/repository/yang".
LY Newer revision than "ietf-inet-types@2013-07-15" not found, using this as the latest revision.
LY Searching for "ietf-yang-types" in "/home/amit/latest/sysrepo/build/repository/yang".
LY Newer revision than "ietf-yang-types@2013-07-15" not found, using this as the latest revision.
LY Searching for "ietf-inet-types" in "/home/amit/latest/sysrepo/build/repository/yang".
LY Newer revision than "ietf-inet-types@2013-07-15" not found, using this as the latest revision.
LY Searching for "ietf-yang-types" in "/home/amit/latest/sysrepo/build/repository/yang".
LY Newer revision than "ietf-yang-types@2013-07-15" not found, using this as the latest revision.
LY Searching for "ietf-datastores" in "/home/amit/latest/sysrepo/build/repository/yang".
LY Loading schema from "/home/amit/latest/sysrepo/build/repository/yang/[e-mail]" file.
LY Searching for "ietf-yang-library" in "/home/amit/latest/sysrepo/build/repository/yang".
LY Loading schema from "/home/amit/latest/sysrepo/build/repository/yang/[e-mail]" file.
LY Searching for "ietf-netconf-acm" in "/home/amit/latest/sysrepo/build/repository/yang".
LY Loading schema from "/home/amit/latest/sysrepo/build/repository/yang/[e-mail]" file.
LY Searching for "sysrepo-monitoring" in "/home/amit/latest/sysrepo/build/repository/yang".
LY Loading schema from "/home/amit/latest/sysrepo/build/repository/yang/[e-mail]" file.
LY Implemented module "ietf-datastores@2018-02-14" is not used for import, revision "2018-02-14" is imported instead.
LY Searching for "sysrepo-plugind" in "/home/amit/latest/sysrepo/build/repository/yang".
LY Loading schema from "/home/amit/latest/sysrepo/build/repository/yang/[e-mail]" file.
LY Searching for "ietf-netconf" in "/home/amit/latest/sysrepo/build/repository/yang".
LY Loading schema from "/home/amit/latest/sysrepo/build/repository/yang/[e-mail]" file.
LY Searching for "ietf-yang-metadata" in "/home/amit/latest/sysrepo/build/repository/yang".
LY Newer revision than "ietf-yang-metadata@2016-08-05" not found, using this as the latest revision.
LY Searching for "ietf-netconf-with-defaults" in "/home/amit/latest/sysrepo/build/repository/yang".
LY Loading schema from "/home/amit/latest/sysrepo/build/repository/yang/[e-mail]" file.
LY Searching for "ietf-netconf-notifications" in "/home/amit/latest/sysrepo/build/repository/yang".
LY Loading schema from "/home/amit/latest/sysrepo/build/repository/yang/[e-mail]" file.
LY Implemented module "ietf-netconf@2013-09-29" is not used for import, revision "2013-09-29" is imported instead.
LY Searching for "ietf-origin" in "/home/amit/latest/sysrepo/build/repository/yang".
LY Loading schema from "/home/amit/latest/sysrepo/build/repository/yang/[e-mail]" file.
LY Searching for "ibos-interfaces" in "/home/amit/latest/sysrepo/build/repository/yang".
LY Loading schema from "/home/amit/latest/sysrepo/build/repository/yang/[e-mail]" file.
LY Searching for "ibos-yang-types" in "/home/amit/latest/sysrepo/build/repository/yang".
LY Loading schema from "/home/amit/latest/sysrepo/build/repository/yang/[e-mail]" file.
LY Searching for "ibos-types" in "/home/amit/latest/sysrepo/build/repository/yang".
LY Loading schema from "/home/amit/latest/sysrepo/build/repository/yang/[e-mail]" file.
LY Searching for "ibos-extensions" in "/home/amit/latest/sysrepo/build/repository/yang".
LY Loading schema from "/home/amit/latest/sysrepo/build/repository/yang/[e-mail]" file.
LY Searching for "ibos-ip-route" in "/home/amit/latest/sysrepo/build/repository/yang".
LY Loading schema from "/home/amit/latest/sysrepo/build/repository/yang/[e-mail]" file.
LY Searching for "ibos-inet-types" in "/home/amit/latest/sysrepo/build/repository/yang".
LY Loading schema from "/home/amit/latest/sysrepo/build/repository/yang/[e-mail]" file.
[INF] Connection 10 created.
[INF] Session 7 (user "root", CID 10) created.
/ibos-interfaces:interfaces/interface[name='ethernet1/1']/config/name = ethernet1/1
/ibos-interfaces:interfaces/interface[name='ethernet1/2']/config/name = ethernet1/2
/ibos-interfaces:interfaces/interface[name='ethernet1/3']/config/name = ethernet1/3
/ibos-interfaces:interfaces/interface[name='ethernet1/4']/config/name = ethernet1/4
/ibos-interfaces:interfaces/interface[name='et1/4/vid1']/config/name = et1/4/vid1
/ibos-interfaces:interfaces/interface[name='et1/4/vid3']/config/name = et1/4/vid3
/ibos-interfaces:interfaces/interface[name='et1/5/vid2']/config/name = et1/5/vid2
/ibos-interfaces:interfaces/interface[name='et1/5/vid4']/config/name = et1/5/vid4
[INF] No datastore changes to apply.

Thanks,

[Michal Vasko]

sr_val_t structures are not using libyang dictionary so you will never get the warning this way.