C code that emulates the pipe command

[xchen123]

Anyone have code that emulates the pipe command?

Ex. pipeit <arg1> <arg2>

 

[Robinhood361]

Parallel execution of two commands needs syncronization of output of first command to the input of the second. Writing such code won't be too easy.

There is a in-built C function system() which can execute shell commands from within the C code. You can pass your arguments to this function with a pipe..

Syntax : system(char *Command);

cheers
ashish

 

[Salem]

> Anyone have code that emulates the pipe command?
Which operating system and compiler do you have?

 

[marsd]

I don't think you're going to be able to do this
portably either. Reading the output from the command
into a file and then rereading it in another exec'd
programs stdin is lousy.
Just my opinion trying this with ansi C.

 

[xchen123]

Salem,

Solaris 8 (sparc) and gcc.

 

[Salem]

The system calls (section 2 of the manual pages) you will find interesting are
fork()
pipe()
dup2()
open()
close()