Executing an external shell command

This is a discussion on Executing an external shell command within the C++ Programming forums, part of the General Programming Boards category; I've been reading about executing an external command in this FAQ . Also when I do some googling, I've found ...

  1. #1
    In the Land of Diddly-Doo g4j31a5's Avatar
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    Executing an external shell command

    I've been reading about executing an external command in this FAQ. Also when I do some googling, I've found out about popen() and pclose(). The question is what's the difference of popen/pclose with system, spawn and exec? Which is better?

    Thanks in advance.
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  2. #2
    and the hat of wrongness Salem's Avatar
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    popen/pclose give you a convenient way of reading the standard output (or writing to the standard input) of the command you invoke.

    system() just does what you would type at the command prompt.

    spawn/exec provide increasing levels of control over the details.
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    In the Land of Diddly-Doo g4j31a5's Avatar
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    I see. I understand it better now. Thanks. I can't understand much only from the man pages.
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