I am interested in writing separate program modules that run as independent threads that I could hook together with pipes. The motivation would be that I could write and test each module completely independently, perhaps even write them in different languages, or run the different modules on different machines. There are a wide variety...
I'm trying something like this Output.py print "Hello" Input.py greeting = raw_input("Give me the greeting. ") print "The greeting is:", greeting At the cmd line Output.py | Input.py But it returns an EOFError. Can someone tell me what I am doing wrong? Thanks for your help. EDIT Patrick Harrington solution works but I don'...
I'm using linux. Let's say I have a program named add. The program takes two numbers. so if I type in add 1 2 the answer is 3 //obvious what command will make this write out to a file named add.data I'm kind of a linux n00b. I was reading about piping. Thanks. ...
Hi, I don't know much about this and was just curious because i had an idea :) I know with my cPanel hosting i can pipe an email inbox to a script, but what i want to do is: send to [email protected] pipes to mail.php mail.php reads the subject, and a .txt attachment the contents of the subject and .txt attachment are stored in the database ...
Hi, I'm trying to create a simple shell in C for Unix. I've been able to do all the parsing of commands and execution, but I'm having a problem with piping. I think the problem is that I'm not hooking into the correct pipe for the input of the second command. For example, if I type "ls | wc", it will pause after the "wc" command, which...
Is there a ready made lisp macro that allows chaining (piping) of functions? I couldn't find one. I'll try to explain what I mean with this example. Instead of using let* with lots of unused intermediate variables like this: (let* ((var1 (f1 x y)) (var2 (f2 x var1)) (var3 (f1 var2 z))) var3) I would like to have it written l...
In The Unix Programming Environment by K & P, it is written that " The programs in a pipeline actually run at the same time, not one after another. This means that programs in a pipeline can be interactive;" How can programs run at same time? For ex: $ who | grep mary | wc -l How grep mary will be executed until who is run or how wc -...
I am trying to implement a linux shell that supports piping. I have already done simple commands, commands running in background, redirections, but piping is still missing. I have already read about it and seen some snippets of code, but still haven't been able to sort out a working solution. What I have so far: int fd[2]; pipe(fd); ...
Really simple question, how do I combine echo and cat in the shell, I'm trying to write the contents of a file into another file with a prepended string? If /tmp/file looks like this: this is a test I want to run this: echo "PREPENDED STRING" cat /tmp/file | sed 's/test/test2/g' > /tmp/result so that /tmp/result looks like this: ...
I have written a program which writes a list of data to a '.dat' file with the intention of then plotting it separately using gnuplot. Is there a way of making my code plot it automatically? My output is of the form: x-coord analytic approximation x-coord analytic approximation x-coord analytic approximation x-coord ...
I have created a pipe script in CPanel and have placed the hashbang:#!/usr/bin/php -q at the beginning of my script. The script does run and places a log of the email into a table in my DB as it should. But...It sends an email back claiming that the email did not go through and appears as... This message was created automatically by mai...
Currently my application takes in a text file/files, parses them into another file type and puts them on disk. I then call a secondary program (not mine) to process THAT text file into a third. The foreign program basically does one thing: program.exe --input:foo.txt --output:bar.txt What I would like to know... could I replace th...
I currently have an implementation of a program where I read in the input using the Scanner class. Integer by integer. I do this by piping the input file via the command line. java program < input.txt I need to avoid piping the input by using an argument on the command line to open the file in my program. java program --file=in...
I'm just trying my hand in bash, so I wrote a simple program in C to count the number of characters in a file. This is my C program: #include <stdio.h> int main() { int i, nc; nc = 0; i = getchar(); while (i!=EOF){ nc = nc + 1; i = getchar(); } printf("%d\n",nc); return 0; } This is the bash command I'm using ...
I am using the TFS PowerTools Cmdlets in PowerShell to try to get at some information about Changesets and related WorkItems from my server. I have boiled the problem down to behavior I don't understand and I am hoping it is not TFS specific (so someone out there might be able to explain the problem to me :) ) Here's the only command th...