簡化的nginx多進程模型demo，簡化nginxdemo

簡化的nginx多進程模型demo，簡化nginxdemo

[test@vm c]$ cat mynginx.c
#include <stdio.h>
#include <string.h>
#include <unistd.h>

char **os_argv;
char  *os_argv_last; 
init_setproctitle(void)
{
    char      *p; 
    size_t       size;
    int   i;  

    size = 0;

    os_argv_last = os_argv[0];

    for (i = 0; os_argv[i]; i++) {
        if (os_argv_last == os_argv[i]) {
            os_argv_last = os_argv[i] + strlen(os_argv[i]) + 1;
        }   
    }   
    os_argv_last += strlen(os_argv_last);
}

void setproctitle(char *title)
{
    char  *p;
    os_argv[1] = NULL;

    p = strncpy((char *) os_argv[0], (char *) title,
            strlen(title));
    p += strlen(title);

    if (os_argv_last - (char *) p > 0) {
        memset(p, ' ', os_argv_last - (char *) p);
    }

}

void start_woker_processes()
{
    setproctitle("mynginx:worker process");
    for(;;)
    {
        sleep(1);
        printf("worker pid=%d\n",getpid());
    }
}

void start_dispatcher_process()
{
    setproctitle("mynginx:dispatcher process");
    for(;;)
    {
        sleep(1);
        printf("\tdispatcher pid=%d\n",getpid());
    }
}


void save_argv(int argc, char *const *argv)
{
    os_argv = (char **) argv;
}

int main(int argc, char **argv)
{
    int fd;
    int i;
    pid_t pid;
    save_argv(argc, argv);
    init_setproctitle();
    printf("father pid1=%d\n",getpid());
    for (i = 0; i <3; i++)
    {
        pid = fork(); 
        if (pid == 0)
        {
            start_woker_processes();
        }
    } 
    pid = fork();
    if (pid == 0)
    {
        start_dispatcher_process();
    }
    printf("father pid2=%d\n",getpid());
    while(1)
        sleep(1);
    return 0;
}

make mynginx

./mynginx

ps -ef |grep mynginx 即可看到

test 20553 20463 0 23:54 pts/0 00:00:00 ./mynginx
test   20554 20553 0 23:54 pts/0 00:00:00 mynginx:worker process
test   20555 20553 0 23:54 pts/0 00:00:00 mynginx:worker process
test   20556 20553 0 23:54 pts/0 00:00:00 mynginx:worker process
test   20557 20553 0 23:54 pts/0 00:00:00 mynginx:dispatcher process
root 20574 20560 0 23:54 pts/2 00:00:00 grep mynginx