Thread: C programming,very short question?

  1. #1
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    Feb 2013

    C programming,very short question?

    I have an absolute path to a directory and name of .c file to be compiled and maybe run it if it is possible ? (using gcc like gcc test.c and then ./a.out to run)

    I want to use execlp to run the command and I think before using execlp I need to call :
    setenv("PATH", newpath);
    I am new to system programing and I am wondering can someone help me to write that line of code

    int execlp(const char *path, const char *arg0, ..., NULL);

  2. #2
    and the hat of int overfl Salem's Avatar
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    Aug 2001
    The edge of the known universe
    Well you seem to have everything you need, short of actually trying it for yourself.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

  3. #3
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    May 2012
    execlp terminates the calling program, the executes the child. So virtually always you need to call fork(), test that you are in the child branch of the fork(), then call execlp.
    I'm the author of MiniBasic: How to write a script interpreter and Basic Algorithms
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