Hi Les,
this is standard Unix pipelining that was then implemented on DOS/Windows (and
OS/2) as well: each process gets three standard file handles assigned with the
same file descriptor (fd), which is 0 for standard input (known as stdin,
usually the keyboard), 1 for standard output (stdout, usually the screen and 2
for standard error output (stderr, usually the screen).
If you invoke a command on the shell you can redirect the input and output, eg
like
Redirecting stdout to a file:
cmd > out.txt
Refirecting stderr to a file:
cmd 2> err.txt
Redirecting stdin to get the entries from a file:
Cmd < input.txt
One can combine these in any combination, also eg:
cmd < input.txt > out.txt 2> err.txt
In addition one can redirect the stdout file to be the stdin of a following
command using the pipe character | like
cmd1 | cmd2
Whatever cmd1 writes to stdout will become the stdin input ofhe following cmd2.
There are quite a few articles and tutorials on the web.
---
In Rexx the say statement writes to stdout; one can use the pseudo filename
"stdout:" in the lineout or charout BIFs. The stderr pseudo filename in Rexx is
called "stderr" and for stdin the pseudo filename is called "stdin".
In addition ooRexx provides the environment symbols ,input for .stdin, .output
for .stdout and .error for .stderr.
---rony
Rony G. Flatscher (mobil/e)
> Am 12.09.2016 um 12:01 schrieb Les Koehler <vmr...@tampabay.rr.com>:
>
> Rony,
>
> By what magic does that become input to yad?
>
> Les
>
>> On 9/12/2016 5:55 AM, Rony wrote:
>> Leslie,
>>
>> usually a plain say-statement suffices, as it writes to stdout. If you need
>> tderr then use the .error monitor like:
>>
>> .error~say("some error information")
>>
>> HTH
>>
>> ---rony
>>
>> Rony G. Flatscher (mobil/e)
>>
>>> Am 11.09.2016 um 06:27 schrieb J. Leslie Turriff o <jlturr...@mail.com>:
>>>
>>> In the Linux terminal environment, there is a common paradigm for feeding
>>> data into a command. Two examples from the yad* man file are:
>>>
>>> Show search results in a list dialog with the title 'Search Results' and
>>> the
>>> text 'Finding all header files...'.
>>>
>>> find . -name '*.h' | yad --list --title "Search Results" --text "Finding
>>> all
>>> header files.." --column "Files"
>>>
>>> Display a progress dialog while searching for all the postscript files in
>>> your home directory
>>>
>>> find $HOME -name '*.ps' | yad --progress --pulsate
>>>
>>> I would like to use yad to display the output from my ooRexx programs, but
>>> it's not clear how that could be accomplished. Can anyone here suggest a
>>> method?
>>>
>>> Leslie
>>>
>>> *yad is Yet Another Dialog tool for displaying information in a GUI window.
>>> --
>>> A Caution to Everybody
>>>
>>> Consider the Auk;
>>> Becoming extinct because he forgot how to fly, and could only walk.
>>> Consider man, who may well become extinct
>>> Because he forgot how to walk and learned how to fly before he thinked.
>>>
>>> -- Ogden Nash
>>>
>>> ------------------------------------------------------------------------------
>>> _______________________________________________
>>> Oorexx-users mailing list
>>> Oorexx-users@lists.sourceforge.net
>>> https://lists.sourceforge.net/lists/listinfo/oorexx-users
>>
>>
>> ------------------------------------------------------------------------------
>> _______________________________________________
>> Oorexx-users mailing list
>> Oorexx-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/oorexx-users
>
> ------------------------------------------------------------------------------
> _______________________________________________
> Oorexx-users mailing list
> Oorexx-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/oorexx-users
------------------------------------------------------------------------------
What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic
patterns at an interface-level. Reveals which users, apps, and protocols are
consuming the most bandwidth. Provides multi-vendor support for NetFlow,
J-Flow, sFlow and other flows. Make informed decisions using capacity
planning reports. http://sdm.link/zohodev2dev
_______________________________________________
Oorexx-users mailing list
Oorexx-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/oorexx-users
