awk - oneliner vs multiple line .

I'm trying to write to stdin and read from stdout ( and stderr ) from an external program, without changing the code.

I've tried using named pipes, but stdout doesn't show until the program is terminated and stdin only works on the first input( then cin is null ).

i've tried using /proc/[pid]/fd but that only writes and reads from the terminal and not the program.

Ok hope my vocab is right here, i'm trying to write multiple sets of arguments to another file for example:

I have a script that accepts four arguments and sends them to a another file

$write.sh it then out in

so the file receiver.txt would contain this:

Code: it then out in what do I need to do to execute another so it would do this

$write.sh dot spot got jot

Code: it then out in d

I'm in a software security class and we are currently learning about buffer overflows and how they are exploited.

Hello every one,

I have two files : file1 and file2

- file1 contains one column and multiple lines. - file2 contains multiple lines and multiple columns.

I want to do a script that compare the first column of file2 with the only column of file1 then took the lines that are the same and search for each line the whole line on file2 then write the result on a file that we can call RESULT.

Here is

I have three files: f1, f2, and f3.

Hello All,

I am new to scripting and I am trying to write a script which can scp a file from one box to multiple boxes. I am thinking to do like this. 1) create a file with list of all server names 2)write a script which will pick up each server line by line from server list and copy it to required dir

say I have my server list here cat /home/test/server.lst

171.134.55.23 171.133.23.24 and s

I have an external program script that produces an output file (largish, 20K lines possible).

I need to insert a new line between the existing line 1 and line 2. I've been looking at awk and sed - I use one liners in each fairly regularly - but I haven't been able to come up with the right switches to do this.

Hello ,

I have comma delimited file with over 20 fileds that i need to do some validations on. I have to check if certain fields are null and then write the line containing the null field into a new file and then delete the line from the current file.

Can someone tell me how i could go about doing this?

Hello. I'm new to Perl and I am not sure how to interpret command line arguments in the program. I am writing a program similar to the Unix utility 'tail' and need to check if first argument is '-1' ([dash]1) or any arbitrary number of lines to output. How would I write an 'if' statement to check for the dash (-) and a number?