How to write to stdin of another program (program A -> [stdin]program B) - High Level Programming

vvaidyan · #1 (**permalink**) 04-30-2008

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 B", "PROGRAM B", NULL);

* parent
-> char line[100];
-> read(fd[0], line, 100);

Question:
---------
How to write to stdin of PROGRAM B from PROGRAM A?
* should I use a different pipe?
* how to I read stdin in PROGRAM B? using cin?

Thanks in advance,
Vivek

Franklin52 · #2 (**permalink**) 04-30-2008

It's against the:

Simple rules of the UNIX.COM forums:

to double posts questions, continue here:

How to write to stdin of another program (program A -> [stdin]program B)

Thread close

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