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IBM / ibmichroot

A set of scripts to facilitate the use of chroot-based containers for IBM i
MIT License
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"system" command doesn't work in chroot #38

Closed abmusse closed 8 years ago

abmusse commented 8 years ago

Original report by Aaron Bartell (Bitbucket: aaronbartell, GitHub: aaronbartell).

I thought I had asked you (@rangercairns) this before but couldn't find my question in any achives... should the PASE system command work in chroot? It isn't working for me and I have a sinking feeling it's because it is somehow linked to /QSYS.LIB (which would obviously fail).

abmusse commented 8 years ago

Original comment by Aaron Bartell (Bitbucket: aaronbartell, GitHub: aaronbartell).

Closing this thread in favor of this one on db2util project.

abmusse commented 8 years ago

Original comment by Tony Cairns (Bitbucket: rangercairns, GitHub: rangercairns).

Ok, the project is up. Make file is gcc. I provided a Yips link to a compiled 'test version'. We should move any chat about this tool to the db2util issues.

abmusse commented 8 years ago

Original comment by Aaron Bartell (Bitbucket: aaronbartell, GitHub: aaronbartell).

Sa-weet!

Here's the new litmis/db2util repo. I've made you an admin so you should be able to clone/push.

abmusse commented 8 years ago

Original comment by Tony Cairns (Bitbucket: rangercairns, GitHub: rangercairns).

Start a new litmis project called 'db2util'. I started your shell toy this afternoon ... looking good.

#!shell

bash-4.3$ make
gcc -g -I. -I/usr/include -I.. -c db2util.c
gcc -g db2util.o -L. -lpthreads -liconv -ldl -lpthread -ldb400 -o db2util
bash-4.3$ db2util "select * from QIWS/QCUSTCDT where LSTNAM='Jones' or LSTNAM='Vine'"      
"839283","Jones   ","B D","21B NW 135 St","Clay  ","NY","13041","400","1","100.00",".00"
"392859","Vine    ","S S","PO Box 79    ","Broton","VT","5046","700","1","439.00",".00"
"392859","Vine    ","S S","PO Box 79    ","Broton","VT","5046","700","1","439.00",".00"

bash-4.3$ db2util "select * from QIWS/QCUSTCDT where LSTNAM='Jones' or LSTNAM='Vine'" json
{"records":[
{"CUSNUM":"839283","LSTNAM":"Jones   ","INIT":"B D","STREET":"21B NW 135 St","CITY":"Clay  ","STATE":"NY","ZIPCOD":"13041","CDTLMT":"400","CHGCOD":"1","BALDUE":"100.00","CDTDUE":".00"},
{"CUSNUM":"392859","LSTNAM":"Vine    ","INIT":"S S","STREET":"PO Box 79    ","CITY":"Broton","STATE":"VT","ZIPCOD":"5046","CDTLMT":"700","CHGCOD":"1","BALDUE":"439.00","CDTDUE":".00"},
{"CUSNUM":"392859","LSTNAM":"Vine    ","INIT":"S S","STREET":"PO Box 79    ","CITY":"Broton","STATE":"VT","ZIPCOD":"5046","CDTLMT":"700","CHGCOD":"1","BALDUE":"439.00","CDTDUE":".00"}
]}
bash-4.3$ db2util "select * from QIWS/QCUSTCDT where LSTNAM='Jones' or LSTNAM='Vine'" space
"839283" "Jones   " "B D" "21B NW 135 St" "Clay  " "NY" "13041" "400" "1" "100.00" ".00"
"392859" "Vine    " "S S" "PO Box 79    " "Broton" "VT" "5046" "700" "1" "439.00" ".00"
"392859" "Vine    " "S S" "PO Box 79    " "Broton" "VT" "5046" "700" "1" "439.00" ".00"

bash-4.3$
abmusse commented 8 years ago

Original comment by Tony Cairns (Bitbucket: rangercairns, GitHub: rangercairns).

... skip db2 anything and call directly into xmlservice (memory driver) Would this work from chroot?

Yes and no.

Calling ILE PGMS, CMDS, *SRVPGMS, ... yes.

Call xmlservice shell functions like system 'thing' ... no (same as command line).

Any wager at a guess of speed improvements?

Not a lot.

However, we have been working on an XMLSERVICE 2, which could run much faster.

abmusse commented 8 years ago

Original comment by Aaron Bartell (Bitbucket: aaronbartell, GitHub: aaronbartell).

... three French hens ... two turtle doves ... and ... a partridge in a pear tree.

:-) Christmas in July, I like it.

not avail - we do not have a shell-driver-db2-interface to iPlug today, but it is possible (db2 driver)

The mention of libdb400.a triggered memory of the db2sock project. I am thinking that might be a good foundation.

not avail - you could also skip db2 anything and call directly into xmlservice (memory driver)

Would this work from chroot? Any wager at a guess of speed improvements?

abmusse commented 8 years ago

Original comment by Tony Cairns (Bitbucket: rangercairns, GitHub: rangercairns).

I am wondering if we could/should develop a shell-itoolkit that goes directly against ... XMLSERVICE

From a shell language (bash, ksh, etc.) ...

abmusse commented 8 years ago

Original comment by Tony Cairns (Bitbucket: rangercairns, GitHub: rangercairns).

We already have open source/working SQL CLI API code in the ruby-ibm_db, so we could use that code. And then we could borrow code from the Linux system command for creating hooks into the compiled SQL CLI APIs.

... three French hens ... two turtle doves ... and ... a partridge in a pear tree.

What you really want is an equivalent db2 pase command that uses the libdb400.a driver. Yes it is complete possible.

abmusse commented 8 years ago

Original comment by Aaron Bartell (Bitbucket: aaronbartell, GitHub: aaronbartell).

Bummer.

I am wondering if we could/should develop a shell-itoolkit that goes directly against the SQL CLI APIs (invoking XMLSERVICE's iPLUGR4K stored proc). It would remove the requirement for PHP/Ruby/Python/Node.js. We already have open source/working SQL CLI API code in the ruby-ibm_db, so we could use that code. And then we could borrow code from the Linux system command for creating hooks into the compiled SQL CLI APIs.

We could name the shell script itoolkit and run it as follows:

$ itoolkit -cmd 'DSPJOBLOG'
...joblog output...
$ itoolkit -raw '<xml><script>...input...</script>'
<xml...><script>...output...</script>
abmusse commented 8 years ago

Original comment by Tony Cairns (Bitbucket: rangercairns, GitHub: rangercairns).

I have a sinking feeling it's because it is somehow linked to /QSYS.LIB

Correct my sinking friend (blub, blub, blub, quicksand). PASE 'system' command calls *PGMs in /QSYS.LIB, which has been rendered not available in chroot. By the same token, anything qshell (qsh), will not work because it also is /QSYS.LIB.