I have been trying a few filtering scripts with both SED and PERL. So far I have both of these versions working to reformat the incoming text stream (from stdin) into the corrent format (it looks good in the terminal), but I don't think that I am doing it right because the formatted text is not available to other applications/operations... but I can see it coming through in the terminal? Is this weird?
this is my setup:
% foo.app | perlFilter.pl
Works great - I can see it in the terminal, but
% foo.app | perlFilter > text
puts nothing into the file text!
% foo.app | perlFilter | nc 127.0.0.1 5001
Shows nothing going through to
nc -l -p 5001
Running nc in verbose mode shows that nothing is going through...
Here is my PERL script:
Do I need to explicitly write out to stdout or something?
Why does this until false; do history | head -5; done
result in a stdout infinite loop, yet until false; do history | head -5 > hist5; done
only writes it once to file hist5? Furthermore, I can hear the hard drive working on the 2nd command until I end the process, but the history | head -5 is... (1 Reply)
As a result of whiptail menu option I am getting a data from a file.
Naturally it is output to terminal as stdour.
I like to redirect the output back to the menu.
It can be done with single input of line of text , see attached.
I just cannot see where or how the sample... (0 Replies)
Hello all. I've been lurking here for a year or two and finally decided to post.
I need some assistance with file descriptors, stdout, and redirecting output. I've searched through a number of very helpful threads here (unfortunately I can't link to any of them yet due to my low post count...),... (2 Replies)
Hi,
I already searched through the forum and tried to find a answer for my problem but I didn't found a full working solution, thats way I start this new thread and hope, some can help out.
I wonder that I'm not able to find a working solution for the following scenario:
Working in bash I... (8 Replies)
Hi,
I am trying to execute a command like this:
find ./ -name "*.gz" -exec sh -c 'zcat {} | awk -f parse.awk' \; >> output
If I want to print the filename, i generally use the -print argument to the find command but when I am redirecting the output to a file, how can I print just the... (2 Replies)
Using Cygwin PDksh - But also have tested it on Linux with same results
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I have a script that invokes a program/script and returns a string of data (1234 "12 34 56" 6789) and using "set -A" inserting it into an array.
script code snipit >>
get_array=$(php... (2 Replies)
hello hackers.
i have a curl process running as cgi directly pushing stdout to the client. but i want to additionally save that stream to a file at the same time.
any directions madly welcome.
thanks in advance (3 Replies)
This is about getting all output to stderr and stdout localized. Nothing to do with redirecting output to a file (there already are some interesting threads about that issue on this forum).
What I intend to do is capturing all lines of text sent to the screen, compare them with an array of... (2 Replies)
Hello everybody,
Is there a more elegant way to make dual output (display on standard output and append to a file) while I'm executing a shell script, besides duplicating the echo command for every string?
echo "Message..." > 1
echo "Message..." >> myfile.out
Thank you for your time,... (2 Replies)
Is there a way to send the syslog output for a given facility to stderr or stdout?
I do not want to use the "tail" command to achieve this, I would like it to go directly to stderr.
Thanks in advance (1 Reply)