thanks a lot for that third solution ... I assume that one is better than the previous ones because it is not necessary to use a loop, right ?
I allow myself to ask you a last question (well, two last questions more precisely) regarding your proposal: I am always lost with the "double quote":
why is it necessary to use 2 times "double quote" in that case ?
why is it necessary to protect the outer "double quote" ?
Thanks again to all of your for your time and dedication,
Didier.
---------- Post updated at 09:27 PM ---------- Previous update was at 07:48 PM ----------
RudiC,
just to complete my previous questions in my last post, below an example which is quite difficult to understand for me: using the double-quote two times (with "protection" of the "outer ones") leads the result I want to obtain (this is the syntax you recommend and this is perfect) and deleting the "inner ones" leads to lose the "spaces" and "carriage returns" ...
Too difficult to me !
Last edited by rbatte1; 11-07-2016 at 06:13 AM..
Reason: Converted to formatted number-list
Hello!
I'm having problems trying to extract the contents of a variable and placing it into a text file. Grateful for any help.
Been trying something along the lines of:
$variable > file.txt
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`cat < $variable` > file.txt
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this a note
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Hi,
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Discussion started by: carlr
2 Replies
LEARN ABOUT SUSE
unbuffer
UNBUFFER(1) General Commands Manual UNBUFFER(1)NAME
unbuffer - unbuffer output
SYNOPSIS
unbuffer program [ args ]
INTRODUCTION
unbuffer disables the output buffering that occurs when program output is redirected from non-interactive programs. For example, suppose
you are watching the output from a fifo by running it through od and then more.
od -c /tmp/fifo | more
You will not see anything until a full page of output has been produced.
You can disable this automatic buffering as follows:
unbuffer od -c /tmp/fifo | more
Normally, unbuffer does not read from stdin. This simplifies use of unbuffer in some situations. To use unbuffer in a pipeline, use the
-p flag. Example:
process1 | unbuffer -p process2 | process3
CAVEATS
unbuffer -p may appear to work incorrectly if a process feeding input to unbuffer exits. Consider:
process1 | unbuffer -p process2 | process3
If process1 exits, process2 may not yet have finished. It is impossible for unbuffer to know long to wait for process2 and process2 may
not ever finish, for example, if it is a filter. For expediency, unbuffer simply exits when it encounters an EOF from either its input or
process2.
In order to have a version of unbuffer that worked in all situations, an oracle would be necessary. If you want an application-specific
solution, workarounds or hand-coded Expect may be more suitable. For example, the following example shows how to allow grep to finish pro-
cessing when the cat before it finishes first. Using cat to feed grep would never require unbuffer in real life. It is merely a place-
holder for some imaginary process that may or may not finish. Similarly, the final cat at the end of the pipeline is also a placeholder
for another process.
$ cat /tmp/abcdef.log | grep abc | cat
abcdef
xxxabc defxxx
$ cat /tmp/abcdef.log | unbuffer grep abc | cat
$ (cat /tmp/abcdef.log ; sleep 1) | unbuffer grep abc | cat
abcdef
xxxabc defxxx
$
BUGS
The man page is longer than the program.
SEE ALSO
"Exploring Expect: A Tcl-Based Toolkit for Automating Interactive Programs" by Don Libes, O'Reilly and Associates, January 1995.
AUTHOR
Don Libes, National Institute of Standards and Technology
1 June 1994 UNBUFFER(1)