execlp() vs excelp < 0 error handling question

This is a discussion on execlp() vs excelp < 0 error handling question within the Linux Programming forums, part of the Platform Specific Boards category; What the difference in doing something like Code: int main(void) { pid_t pid; int count; for(count=0; count<5; count++) { pid=fork(); ...

  1. #1
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    execlp() vs excelp < 0 error handling question

    What the difference in doing something like

    Code:
    int main(void) 
    { 
      pid_t pid; 
      int count; 
      for(count=0; count<5; count++) { 
        pid=fork(); 
        if (pid==0) { 
          /* child process */ 
          execlp("kedit", "kedit", (char *) NULL); 
          perror("exec failure"); 
          exit(1); 
        } 
      } 
      return 0; 
    
    }
    as opposed to say something like

    Code:
    int main(void) 
    { 
      pid_t pid; 
      int count; 
      for(count=0; count<5; count++) { 
        pid=fork(); 
        if (pid==0) { 
          /* child process */ 
          if((execlp("kedit", "kedit", (char *) NULL)) < 0){
            perror("exec failure"); 
            exit(1); 
          }
        } 
      } 
      return 0; 
    
    }

  2. #2
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    Apr 2008
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    19
    My man page says that if any of the exec()'s return they will return error, so it seems that both of your programs are functionally identical.

  3. #3
    Cat without Hat CornedBee's Avatar
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    Posts
    8,892
    The latter is clearer for programmers who don't fully understand the exec* family.

    Pointless, though, IMO.
    All the buzzt!
    CornedBee

    "There is not now, nor has there ever been, nor will there ever be, any programming language in which it is the least bit difficult to write bad code."
    - Flon's Law

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