Hi, I cant find any useful answer for this question, although it has been asked in a different way several times I want to share a memory between 2 processes (2 different applications). so that one of them can write to that memory and the other can read. is this possible in .NET? how? Thanks ...
Hi, I just found this pipe. http://pipes.yahoo.com/jonbishop/8vA1gjvl3RGqWknCBB50VA I was just wondering if it was possible to integrate this into my web app? How would I go about doing it. Basically, I have a form on my website - I would like this form to interact with this pipe to get the relevant data. Could someone post a summar...
I need to create a diff file using standard UNIX diff command with python subprocess module. The problem is that I must compare file and stream without creating tempopary file. I thought about using named pipes via os.mkfifo method, but didn't reach any good result. Please, can you write a simple example on how to solve this stuff? I tri...
I wanted to open up a pipe to a program and read output from it. My initial inclination was to use popen(), but the program takes a number of options, and rather that fighting with shell quoting/escaping, I decided to use a combination of pipe(), fork(), dup() to tie the ends of the pipe to stdin/stdout in the parent/child, and execv() t...
Is it possible to download contents of a website (a set of html pages) straight to memory without writing to disk? I have a cluster of machines with 24G ram each, but I'm limited by a disk quota to several hundreds MB. I was thinking of redirecting the output of wget command for example to some kind of in-memory structure without storing...
I'm looking to use twisted to control communication across Linux pipes (os.pipe()) and fifos (os.mkfifo()) between a master process and a set of slave processes. While I'm positive tat it's possible to use twisted for these types of file descriptors (after all, twisted is great for tcp sockets which *nix abstracts away as file descriptor...
I have 2 programs, both written in Java. The first launches several instances of the second and then communicates with them via pipe files. When running 2 instances of the program, (I'll call the launcher A and the others B and C) everything works fine. The pipe files are in /tmp/[pid of A]/B and /tmp[pid of A]/C. If B or C close then ot...
I often have shell programming tasks where I run into this pattern: cat file | some_script > file This is unsafe - cat may not have read in the entire file before some_script starts writing to it. I don't really want to write the result to a temporary file (its slow, and I don't want the added complication of thinking up a unique new ...
Hi All, i have written the following code to copy a string "hello world" to another char array using fork and pipes instead of using standard library functions or standard i/o streams. The program is compiling successfully but i am not getting any output. Even, the printf's output are not being shown. # include <string.h> # include <uni...
Executive summary: I need a way to determine whether a Windows process I've spawned via _spawnl and am communicating with using FDs from _pipe has died. Details: I'm using the low-level CRT function in Windows (_eof, _read) to communicate with a process that was spawned via a call to _spawnl (with the P_NOWAIT) flag. I'm using _pipe t...
I have a C++ application and a Java application that need to log messages in the same way. My Java application uses Apache Commons Logging, backed by a Log4j configuration. I need a single log4j configuration so I can change my logging preferences in one location. In my C++ application, I have captured all calls to printf() and fprintf(s...
Is it possible that I would be able to spawn a detached daemon like process, from a CGI script that stores read text files in memory, then re-access the memory in the next cgi execution, reading the data using a pipe? Would most hosting ISP's, allow detached processes? Are memory pipes fast, and easy to code/work with on a unix/linux sy...
Hey, I am writing to a framebuffer located at "/dev/fb0". Everything works fine until I try to write again to the pipe using an OutputStream, which hangs the program. I have resolved this by closing the output stream and then recreating it, but this seems awfully slow and blunt. Framebuffer.java public class Framebuffer extends ...
I am running a python script in background, but why does it still prints to console, even when piped to a file? I tried the following command: python script.py & python script.py > output.txt & I tried with a simple script: print "hello world" With python script.py & It still prints to console. But python script.py > output.t...
#include<stdio.h> #include<unistd.h> #include<stdlib.h> int main(int argc,char **argv) { int fd[2]; pid_t childpid; pipe(fd); childpid=fork(); if (childpid == -1) { perror("Error forking..."); exit(1); } if (childpid) /*parent proces*/ //grep .c { wait(&childpid); //...
I'm struggling to get a .NET (NOT a WCF) named pipe to communicate across the network. The MSDN documentation implies this is possible, nay trivial. But my code: using (NamedPipeClientStream pipeClient = new NamedPipeClientStream(servername, "myPipe", PipeDirection.InOut, PipeOptions.None, TokenImpersonationLevel.Impersonation)) ... ...
Please check the following code #include <stdio.h> #include <string.h> #include <stdlib.h> #include <termios.h> #include <unistd.h> #include <sys/types.h> #include <signal.h> #include <sys/time.h> #include <time.h> #define CLOCKID CLOCK_REALTIME #define SIG SIGRTMIN int reset = 0; void changemode(int); int kbhit(void); int pfds[2]; s...
I've redirected stdout of a child process spawned with CreateProcess to a pipe. It works fine except that, as far as I can tell, no information about color changes are coming through. The child process is using SetConsoleTextAttribute to change the text color--is it possible to detect this through the pipe and, if so, how? I'm ultimat...
I have all my Apache access log files as access.log, access.log.1 access.log.1.gz etc... What I want is to zcat all files in and not in gzip format and pipe them into an X program. I know I can do: zcat /var/log/apache2/access.log.*.gz | someapp... but that will just work for *.gz and not the first two logs. Any ideas will be appreciat...
I've looked but can't find anything. A program for example, a TTS I use lets you do the following: ~#festival -tts | echo "I am to be spoken" Which is really nice, but for programs I use such as hexdump, I don't know how to pipe text into it. I can REALLY use some of these things, some examples I tried (but failed) are like so: ~#gte...