child05.lc

来自「unix网络编程卷1：套接口API的全书源码」· LC 代码 · 共 53 行

/* include child_make */
#include    "unp.h"##  1 ##src/server/child05.c##
#include    "child.h"##  2 ##src/server/child05.c##

pid_t##  3 ##src/server/child05.c##
child_make(int i, int listenfd, int addrlen)##  4 ##src/server/child05.c##
{##  5 ##src/server/child05.c##
    int     sockfd[2];##  6 ##src/server/child05.c##
    pid_t   pid;##  7 ##src/server/child05.c##
    void    child_main(int, int, int);##  8 ##src/server/child05.c##

    Socketpair(AF_LOCAL, SOCK_STREAM, 0, sockfd);##  9 ##src/server/child05.c##

    if ((pid = Fork()) > 0) {## 10 ##src/server/child05.c##
        Close(sockfd[1]);## 11 ##src/server/child05.c##
        cptr[i].child_pid = pid;## 12 ##src/server/child05.c##
        cptr[i].child_pipefd = sockfd[0];## 13 ##src/server/child05.c##
        cptr[i].child_status = 0;## 14 ##src/server/child05.c##
        return (pid);           /* parent */## 15 ##src/server/child05.c##
    }## 16 ##src/server/child05.c##

    Dup2(sockfd[1], STDERR_FILENO); /* child's stream pipe to parent */## 17 ##src/server/child05.c##
    Close(sockfd[0]);## 18 ##src/server/child05.c##
    Close(sockfd[1]);## 19 ##src/server/child05.c##
    Close(listenfd);            /* child does not need this open */## 20 ##src/server/child05.c##
    child_main(i, listenfd, addrlen);   /* never returns */## 21 ##src/server/child05.c##
}## 22 ##src/server/child05.c##
/* end child_make */

/* include child_main */
void## 23 ##src/server/child05.c##
child_main(int i, int listenfd, int addrlen)## 24 ##src/server/child05.c##
{## 25 ##src/server/child05.c##
    char    c;## 26 ##src/server/child05.c##
    int     connfd;## 27 ##src/server/child05.c##
    ssize_t n;## 28 ##src/server/child05.c##
    void    web_child(int);## 29 ##src/server/child05.c##

    printf("child %ld starting\n", (long) getpid());## 30 ##src/server/child05.c##
    for (;;) {## 31 ##src/server/child05.c##
        if ((n = Read_fd(STDERR_FILENO, &c, 1, &connfd)) == 0)## 32 ##src/server/child05.c##
            err_quit("read_fd returned 0");## 33 ##src/server/child05.c##
        if (connfd < 0)## 34 ##src/server/child05.c##
            err_quit("no descriptor from read_fd");## 35 ##src/server/child05.c##

        web_child(connfd);      /* process the request */## 36 ##src/server/child05.c##
        Close(connfd);## 37 ##src/server/child05.c##

        Write(STDERR_FILENO, "", 1);    /* tell parent we're ready again */## 38 ##src/server/child05.c##
    }## 39 ##src/server/child05.c##
}## 40 ##src/server/child05.c##
/* end child_main */