我正在尝试创建一个进程树层次结构,它为树高H创建C子进程。我已经编写了以下代码,但它只为每个进程创建一个子进程。我哪里做错了?

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>

void createProcess(int height,int children){
    int root, parent, t1, t2, t3, i, pid, status;

    root = getpid();
    parent = getppid();
    printf("%d: Process starting\n", root);
    printf("%d: Parent's id = %d\n", root, parent);
    printf("%d: Height in the tree = %d\n", root, height);
    printf("%d: Creating %d children at height %d\n", root, children, height - 1);

    char c[4], h[4];
    sprintf(h, "%d", height - 1);
    sprintf(c, "%d", children);

    char *args[] = {"./forkk", h, c, NULL};
    for (i = 0; i < children; i++) {
        t1 = fork();
        if (t1 != 0) {
            printf("child pid %d    parent pid %d\n", getpid(), getppid());
            break;
        }
        if (t1 == 0) {
            execvp("./forkk", args);
        }
    }
    pid = wait(&status);
    sleep(5);
    //printf("%d Terminating at Height %d\n",root,height);
}

int main(int argc, char** argv) {
    int i;

    printf("No of Arguments: %d\n", argc);
    for (i = 0; i < argc; i++) {
        printf("%s\n", argv[i]);
    }
    int height = atoi(argv[1]);
    int children = atoi(argv[2]);
    printf("Height  %d\n", height);
    printf("Children  %d\n", children);
    if (height > 1)
        createProcess(height, children);
    return 0;
}

最佳答案

这是因为你在break循环中有for。在if (t1 != 0)中。父进程在创建第一个子节点后循环。
而“约翰·布林格是对的,这是一种可怕的方式。您所做的是递归调用main函数。你应该也可以在createProcess中处理这个问题。

关于c - C语言中的过程树层次结构,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/52156763/

10-11 11:24