Programming

no no no no no, those have to be EXECUTABLES. you can not *execute* a text file. a text file simply contains DATA. obviously you will get a "command not found" error, because prog1.txt and prog2.txt are not commands. understand?



program1 is executed, the output is then piped ( | ) to tee, tee takes a filename as an argument, and dumps the output from program1 to the given filename, at the same time, tee also outputs (dumps to the screen) the output from program1, which you then pipe to program2.

S.P., what kind of a solution is that? You've restated the problem...

I'm wondering, jodders - are prog1.txt and prog2.txt actually scripts? Or do they just contain some data? Like norsk said, simple text files can't be executed. If these are scripts, then read up on the "chmod" command.

ok cheers guys.i guess i have to make it an executable C++ file.What data can i put? i could have like a print out "hello world" thing couldn't i ?LIke a very simple command.What do i put in prog2? If its going to pipe to prog2,do i create an empty executable?

Wow, looking at this thread, it's resembling homework more and more... can you tell us what exactly you're trying to do jodders? Like what you're actually trying to accomplish, since no one decides to just create some programs to pipe into each other...

Originally posted by oombera
S.P., what kind of a solution is that? You've restated the problem...


The problem was:
prog 1 | ./pipespy myfile.dat | prog2

the standard output of prog1 is supplied as the input to prog2 and copied into file myfile.dat.

And if you create an executable(pipespy) which reads standard input stream and stores data read into a file before it writes back to the standard output will achieve the objective.