Output result for RPC Download in bbf-software-management.yang

[inangovshirinkin]

I am has problem with find output for RPC Download via function libyang::lys_find_xpath() ...

1. Call with LYS_FIND_XP_OUTPUT didn't found anything

lys_find_xpath(ctx, NULL, "/ietf-hardware:hardware/component[name='switch']/bbf-software-management:software/software[name='cpu_sw']/revisions/download/download/*", LYS_FIND_XP_OUTPUT, &items)

[T 63] lys_find_xpath(545)Begin: ctx=0x55fabfb0, ctx_node=0, xpath='/ietf-hardware:hardware/component[name='dpu_switch']/bbf-software-management:software/software[name='banner']/revisions/download/download/*', options=16
[T 63] lys_find_xpath(561)Allocate return set ...
[T 63] lys_find_xpath(566)Compile expression ...
[T 63] lys_find_xpath(569)Exp parsed: used=26, size=30
[T 63] lys_find_xpath(572)Atomize expression ...
[T 63] lys_find_xpath(577)Transform into ly_set ...
[T 63] lys_find_xpath(582)Iterations up to 4 ...
[T 63] lys_find_xpath(584).. [0] type=2, in_ctx=0
[T 63] lys_find_xpath(584).. [1] type=3, in_ctx=0
[T 63] lys_find_xpath(586).. [1] name='hardware'
[T 63] lys_find_xpath(584).. [2] type=3, in_ctx=0
[T 63] lys_find_xpath(586).. [2] name='component'
[T 63] lys_find_xpath(587).. [2] ref='RFC 6933: Entity MIB (Version 4) - entPhysicalEntry'
[T 63] lys_find_xpath(584).. [3] type=3, in_ctx=1
[T 63] lys_find_xpath(586).. [3] name='name'
[T 63] lys_find_xpath(597)Cleanup ...
[T 63] lys_find_xpath(604)Return: 0

2. Calling without any option was returned RPC Download input nodes

lys_find_xpath(ctx, NULL, "/ietf-hardware:hardware/component[name='switch']/bbf-software-management:software/software[name='cpu_sw']/revisions/download/download/*", 0, &items)

[T 63] lys_find_xpath(545)Begin: ctx=0x55ff6fb0, ctx_node=0, xpath='/ietf-hardware:hardware/component[name='switch']/bbf-software-management:software/software[name='cpu_sw']/revisions/download/download/*', options=0
[T 63] lys_find_xpath(561)Allocate return set ...
[T 63] lys_find_xpath(566)Compile expression ...
[T 63] lys_find_xpath(569)Exp parsed: used=26, size=30
[T 63] lys_find_xpath(572)Atomize expression ...
[T 63] lyxp_atomize(9912)Begin
[T 63] lyxp_atomize(9944)Return: 0
[T 63] lys_find_xpath(577)Transform into ly_set ...
[T 63] lys_find_xpath(582)Iterations up to 12 ...
[T 63] lys_find_xpath(584).. [0] type=1, in_ctx=0
[T 63] lys_find_xpath(584).. [1] type=3, in_ctx=0
[T 63] lys_find_xpath(586).. [1] name='hardware'
[T 63] lys_find_xpath(584).. [2] type=3, in_ctx=0
[T 63] lys_find_xpath(586).. [2] name='component'
[T 63] lys_find_xpath(587).. [2] ref='RFC 6933: Entity MIB (Version 4) - entPhysicalEntry'
[T 63] lys_find_xpath(584).. [3] type=3, in_ctx=1
[T 63] lys_find_xpath(586).. [3] name='name'
[T 63] lys_find_xpath(584).. [4] type=3, in_ctx=0
[T 63] lys_find_xpath(586).. [4] name='software'
[T 63] lys_find_xpath(584).. [5] type=3, in_ctx=0
[T 63] lys_find_xpath(586).. [5] name='software'
[T 63] lys_find_xpath(584).. [6] type=3, in_ctx=1
[T 63] lys_find_xpath(586).. [6] name='name'
[T 63] lys_find_xpath(584).. [7] type=3, in_ctx=0
[T 63] lys_find_xpath(586).. [7] name='revisions'
[T 63] lys_find_xpath(584).. [8] type=3, in_ctx=0
[T 63] lys_find_xpath(586).. [8] name='download'
[T 63] lys_find_xpath(584).. [9] type=3, in_ctx=0
[T 63] lys_find_xpath(586).. [9] name='download'
[T 63] lys_find_xpath(584).. [10] type=3, in_ctx=2
[T 63] lys_find_xpath(586).. [10] name='source'
[T 63] lys_find_xpath(591).. [10] Was added
[T 63] lys_find_xpath(584).. [11] type=3, in_ctx=2
[T 63] lys_find_xpath(586).. [11] name='target'
[T 63] lys_find_xpath(591).. [11] Was added
[T 63] lys_find_xpath(597)Cleanup ...
[T 63] lys_find_xpath(604)Return: 0

What am I doing wrong?
And how find output nodes for RPC Download?

[michalvasko]

Please try the latest libyang in devel, there was a bug that should be fixed.

[inangovshirinkin]

Thank you for answer! Will check fix from devel

[inangovshirinkin]

I'm was ckeck with commit 5357561 from devel

but outputs not worked good

[michalvasko]

I have tested it with the current devel and it worked fine. If you have only taken the bugfix, try using the actual current version of libyang. If it still does not work, provide a similar example to mine to reproduce the problem.

[inangovshirinkin]

$ ./test 
Found with output:
Found w/o output:
	source
	target

libyang build from last devel

$ git log
commit eecad552fe58326a646df9cc9d7fea145ed64e3b (HEAD -> devel, origin/devel)
Author: Michal Vasko 
Date:   Fri Dec 15 16:09:57 2023 +0100

    VERSION bump to version 2.1.144

[inangovshirinkin]

$ sudo make install
...
-- Up-to-date: /usr/local/lib/libyang.so.2.45.8
-- Up-to-date: /usr/local/lib/libyang.so.2
-- Up-to-date: /usr/local/lib/libyang.so
...
$ LD_LIBRARY_PATH=/usr/local/lib/ ./test
Found with output:
	target
Found w/o output:
	source
	target
$

[michalvasko]

Okay, so it works for you now.

[inangovshirinkin]

shouldn't it return the target/id ?

[michalvasko]

No, * returns only the children nodes. If you want the descendants of those, recursively, as well, you can use *//., for example.

[inangovshirinkin]

Thank you for answers!

[michalvasko]

Please provide similar output.

> ./test 
Found with output:
        target
Found w/o output:
        source
        target
> ldd ./test
        linux-vdso.so.1 (0x00007ffe597f7000)
        libyang.so.2 => /usr/local/lib64/libyang.so.2 (0x00007f7e3076d000)
        libc.so.6 => /lib64/libc.so.6 (0x00007f7e30400000)
        libm.so.6 => /lib64/libm.so.6 (0x00007f7e30686000)
        libpcre2-8.so.0 => /lib64/libpcre2-8.so.0 (0x00007f7e30359000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f7e3090c000)
> ls -l /usr/local/lib64/libyang.so*
lrwxrwxrwx 1 root root      12 dec 18 14:53 /usr/local/lib64/libyang.so -> libyang.so.2
lrwxrwxrwx 1 root root      17 dec 18 14:53 /usr/local/lib64/libyang.so.2 -> libyang.so.2.45.8
-rwxr-xr-x 1 root root 4022248 dec 15 16:10 /usr/local/lib64/libyang.so.2.45.8