popen vs fopen

This is a discussion on popen vs fopen within the Linux Programming forums, part of the Platform Specific Boards category; Hello, i am trying to find out the difference between popen() and fopen() for a linux based code. Can't seem ...

  1. #1
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    Question popen vs fopen

    Hello,
    i am trying to find out the difference between popen() and fopen() for a linux based code. Can't seem to find reference to popen anywhere!!
    in my code i use:
    sprintf(dat_file,"%s.dat",nextfile);
    fpout=fopen(dat_file,"w")

    but i actually want to write the dat_file to a different location. The program i am in goes to a different directory (the data directory) to look for data and works with it in that location, so how can i write dat_file to the working directory where the code was first called (as i do not have write permissions in the data directory) is popen the way forward??
    THANKYOU!
    emma

  2. #2
    Registered User
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    Aug 2002
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    does popen actually run a shell? like system?

    i thought popen was safer than system because it doesn't run a shell.

    yes, you can call me a pedant.

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