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There is high potential for me to get beaten up in this forum for what silly mistake i did, which was causing all the problem. But I know several people have looked in through this thread spending...

# define MAXLINE 1024

char line[MAXLINE];

while( (rv = read(fd2[0], line, MAXLINE)) != 0)
{
// do whatever
}

Thanks for the help gautham... yes, if I execute the read statement one more time with the same pipe and another char array, I am able to read the next set of buffered output in the pipe. Which means...

Shamrock, sorry about not providing proper details previously.

Program A does have main() fn separately. Program A and B are completely two different programs, just that Program B is called...

can you please tell me the syntax?

According to the code above, am already reading from the pipe after exec'ing program B. Can you please point in code if I had done anything wrong?

Thanks,...

Thanks for the reply shamrock, but it is not solving the problem.

I am able to read the output of PROGRAM B inside PROGRAM A through char line[]. I am receiving output. But the problem is, the...

PROGRAM A <-> PROGRAM B
PROGRAM A sends data as STDIN ro PROGRAM B and when PROGRAM B is executed from PROGRAM A, it sends output back to PROGRAM A. This is implemented using 2 pipes (fd1 & fd2).
...

Found the solution.

Between two binaries, one pipe can serve only one way communication. YOU need two pipes for to and fro communication. You need one pipe to write data to STDIN of another...

Hi,
Program A: uses pipe()

I am able to read the stdout of PROGAM B (stdout got through system() command) into PROGRAM A using:

* child
-> dup2(fd[1], STDOUT_FILENO);
-> execl("/path/PROGRAM...

Hi,
Program A: uses pipe()

I am able to read the stdout of PROGAM B (stdout got through system() command) into PROGRAM A using:

* child
-> dup2(fd[1], STDOUT_FILENO);
-> execl("/path/PROGRAM...

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,...

Hi,
Program A: uses pipe()

I am able to read the stdout of PROGAM B (stdout got through system() command) into PROGRAM A using:

* child
-> dup2(fd[1], STDOUT_FILENO);
->...

Got it...

accessed through $0 / $1 / $2, depending upon the position of the argument.

Thanks,
vvaidyan

Thanks Keelba, from your program, I got it into one liner:

(echo "1.txt";echo "2.txt") | xargs zgrep -n STRING | awk -F: '{printf "%s %s", $1" -", $2 "\n"}'

Later:

xargs zgrep -n STRING |...

Hi all,
I am trying to zgrep / grep list of files so that it displays only the matching filename:line number and does not display the whole line, like:

(echo "1.txt";echo "2.txt") | xargs...