Hi.
I am bit confuse, you see i'm not to sure about the concept of pipe as used by Unix.
How is pipe different from a filter?
so,
How is pipe different from a file redirection?
Thanks, (3 Replies)
ftp> put 75384.DT.pipe
75384.DT.pipe: not a plain file.
ls -l 75384.DT.pipe
prwxrwxrwx 1 aaa staff 308 Apr 01 12:26 75384.DT.pipe
How to transfer this file to other machine? (3 Replies)
Hi,
I am calling a program that greps and returns 72536 bytes of data on STDOUT, say about 7000 lines of data on STDOUT.
I use pipe from the program am calling the above program. Naturally, I execute the above program (through execl() ) throught the child process and try to read the... (4 Replies)
i have a list of files below:
rwxrwxrwx 1 pipe pipe 180 Mar 4 22:47 del_0n_Date
-rwxrwxrwx 1 pipe pipe 472 Mar 4 22:58 mail_Check
-rw-r--r-- 1 pipe pipe 92 Mar 4 22:58 minfo.txt
-rwxrwxrwx 1 pipe pipe 609 Mar 5 05:12... (6 Replies)
Hi All,
I have a file which contains data as below
When we see no pipe character in the line. append those lines to the previous line with pipe character till we get the next line with pipe character with ~(concat with ~)
Input file looks like:
1080530944|001|john.l.bonner|Acknowledge|CN... (11 Replies)
After searching the forum, I found that Bash spawns a subshell when using the pipe. I am wondering if there is an option or any other way to turn off this fuctionality.
We are pulling over some scripts from a Korn shell environment. I have found ways to work around looping from a pipe (Thanks... (4 Replies)
I have a large(ish) pipe delimited file.
The last line of the file contains a total row count and a checksum:
END|1537451|1328569446
After making other adjustments to the file, I need to strip out the checksum and apply a new value - I have a script to generate the checksum and 'cat' it... (3 Replies)
Hello,
I am trying to create a pipe that will direct stdout to in side of the pipe, and stdin to the out side of the pipe - I created two child processes to handle this. However, my pipe doesn't seem to be working correctly. Did I use execv() correctly? Command1 and command2 represent the two... (3 Replies)
Hi there,
I am trying to read stdout from a child process to parent using pipe. I am unable to do so. I would appreciate it if someone can point me in the right direction.
Here's my sample program for basic input output:
#include <stdio.h>
int main()
{
char buffer;... (3 Replies)
hi i am having issues with extra pipe.
i have a data file and i need to remove the extra pipe in the(example 4th and 7thline) in datafile. there are many other line and filed like this which i need to remove from files. The sample data is below:
270 31|455004|24/03/2010|0001235|72
271... (3 Replies)
Hi,guys:
I want to use c to implement a pipe. For example:
ps auxwww | grep fred | more
I forked three child processes. Each is responsible for each command, and pipe to next one.
for(i=0;i<2;i++)
pipe(fd)
if(child==1) // child 1
{
close(1)
dup2(fd,1)
close(fd)
}... (3 Replies)
I have a huge file
which is pipe delimiter and i want to replace the pipe delimiter to a comma
Please Help as its v urgent.
Ex: parent|child|alias|....Heading of the file...and the data is of similar structure. (4 Replies)
Hi!
I am writing a C program that will create a child, child will create a thread and the thread will send a message to a unnamed pipe and will print the message before exiting.
here is my work:
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include... (6 Replies)
Hey guys,
I have to make a C program that simulates this command :
cat (files here) | sort > file.txt
So, I start and create a pipe. Then create the first child. This first child will execute the Cat through the pipe. Then create a second child that will execute sort, with input from... (4 Replies)
with in my files i have the data like this, starting with a pipe and ending the line with a pipe.
all i want is to replace the first and last pipe , remove those
trying to use following sed command, but it is only showing on the screen the entire data of the file as if it removed, but when i... (4 Replies)