Piping the output of a DO loop.

May 20, 2008
Syracuse, NY, USA
I have a BTM that was working fine in both v24 and v25. It produces output like this.
v:\> timecheck.btm
HOST                    OFFSET  STRATUM RTT
0.ubuntu.pool.ntp.org   -0.007     2    21
2.us.pool.ntp.org       -0.007     2    84
ntp0.cornell.edu        -0.006     2    32
3.ubuntu.pool.ntp.org   -0.004     2    92
1.us.pool.ntp.org       -0.003     2    16
1.ubuntu.pool.ntp.org   -0.002     3    90
time.windows.com        +0.001     3    96
0.us.pool.ntp.org       +0.005     2    43

8 hosts responding
adjusted average: -0.004 (22:00:39 Thu 2019-10-10)

As of build 21, I get this from v25.
v:\> timecheck.btm
HOST                    OFFSET  STRATUM RTT

9 hosts responding
adjusted average: -0.006 (22:03:52 Thu 2019-10-10)

A DO loop is obviously still OK because the summary information is correct. So I figure what must be failing is this construction.
do host in @%0:%list | d:\gnu\sort -g -k 2
:: query the time server with @EXECARRAY
:: pick out the desired fields
:: echo a line for that host
:: do some statistical stuff

That construction may not be kosher (we have talked about this before). If it's not supported (and won't be changed), how can I do the same thing without resorting to CALLing another BTM?

Apr 13, 2010
The Hague
Is there anything in particular about that loop that you are attached too?

Very general: higher granularity of your code makes it much easier to spot the point of failure.

Is the time between each server call relevant to your results?

Is it server info, in that response file you are looping over? If so, is the reason you are reading it from a file that it is dynamically created? If not, use string constants.

DO HostInfo in /Q "server1;p1;p2;p3" "server2;p1;p2;p3" "server3;p1;p2;p3"

Will be faster too.

Again, having to guess at timing particulars here, I would dump received data un-interpreted in a simple structure while querying. Post-processing is a separate concern. Reporting yet another.
May 20, 2008
Syracuse, NY, USA
I'm attached to the fact that I don't have to loop over a long list of constants ... all the hostnames are kept in a file (NTFS stream). That file, the one I'm looping over is simple.
v:\> type timecheck.btm:nonnist.txt

The loop and the collection and processing of the returned data work fine. What doesn't work is the piping of DO's output to SORT.
May 20, 2008
Syracuse, NY, USA
I thought I had a simple workaround. Instead of echoing the results (with DO's output piped to sort) I echo it >> tmpfile and when the DO is finished, sort tmpfile to stdout. See it work:
v:\> timecheck.btm
HOST                    OFFSET  STRATUM RTT
2.ubuntu.pool.ntp.org   +0.005     1    51
ntp0.cornell.edu        +0.007     2    27
0.ubuntu.pool.ntp.org   +0.008     2    39
0.us.pool.ntp.org       +0.008     2    32
1.ubuntu.pool.ntp.org   +0.008     2    89
2.us.pool.ntp.org       +0.009     2    42
3.us.pool.ntp.org       +0.011     2    17
1.us.pool.ntp.org       +0.012     3    33
3.ubuntu.pool.ntp.org   +0.013     2    45
time.windows.com        +0.015     3    94

10 hosts responding
adjusted average: +0.009 (10:13:54 Fri 2019-10-11)

But now, I can't use %@EXECSTR[CALL...] on that BTM (whereas I used to be able to do it).

v:\> type calltc.btm
echo %@execstr[call timecheck.btm | ffind /vkme"average"]

v:\> calltc.btm
d:\gnu\sort: fflush failed: standard output: Invalid argument
d:\gnu\sort: write error
May 20, 2008
Syracuse, NY, USA
The construction "DO ... | ..." is still intact.
v:\simplified> type dopipe.btm
do i=5 to 1 by -1 | sort
        echo %i

v:\simplified> dopipe.btm
See the new thread where the problem is simplified.
Similar threads
Thread starter Title Forum Replies Date
vefatica Piping turns on the cursor Support 0
vefatica Trouble piping Support 3
vefatica Piping to WSL? Support 4
H Behavior change re piping a string to a Java program Support 1
vefatica Piping Cscript.exe to HEAD? Support 9
Peter Murschall TPIPE generate unicode on Piping or redirecting Support 3
vefatica Chaining and piping? Support 2
J Piping ANSI control sequences through 'type' Support 4
rps How to? Piping to View /gb Support 1
vefatica Piping to DO x in @con: Support 10
M Piping and redirection: CON: Support 5
vefatica Redirection vs. piping? Support 4
vefatica Fixed Piping to HEAD adds newlines Support 1
nikbackm Piping to new TCC instance crashes it Support 1
S Ctrl-C handling while piping Support 0
A How to? TEE - duplicate output to STDERR Support 3
FreezerBurnt ANSI Prompt messes up list output. Support 39
Ó Recent git output not shown on TCC Support 1
Peter Murschall TEE cannot handle Unicode output Support 2
C TEE command appending null characters to output Support 6
Jesse Heines webform output different in ver. 26 than ver. 25 Support 2
vefatica TCMD output invisible on Win10 Support 22
B How can TCC make an output as a part of command string Support 2
Enigma Take Command 23 duplicates output Support 0
Joe Caverly Works with CMD.EXE, no output with TCC.EXE Support 7
S Output from debugger Support 4
M TCC incorrect dir output since Windows 1803 Support 6
A WAD Output redirection to IF block fails with "unbalanced brackets" Support 7
P Scrollable colored output Support 3
scottb How to? ipconfig output in current window Support 4
David McClelland TEE command puts it's output file in c:\ Support 4
vefatica How to? TPIPE ... see output right away? Support 4
T Fixed Unnecessary debug output Support 3
JohnQSmith Weird DIR output (missing lines) Support 1
J WAD Output redirection in tcexit looses data Support 31
vefatica Console output slower that before Support 8
Mordachai How to capture all console output from a TCMD session? Support 4
C Output continues after Ctrl-Break Support 8
Steve Pitts WAD Strange output from DEL of a non-existent directory Support 7
I perl output is not visible Support 4
I v16 - cls corrupts output stream Support 7
D Fixed Minor problem: output not alligned in the tree command Support 1
vefatica WAD IDE, output window to foreground Support 3
R WAD Strange output from "memory" command Support 1
A How to? Set up a log file for all command output Support 3
A How to? Use TEE with .NET output Support 6
T How to? Logging Output from External Programs Support 4
Frank output of @ipaddress/@ipname Support 1
dcantor Unidentifiable output Support 16
Stefano Piccardi forum software writes debugging output Support 5

Similar threads