如题,在WINDOWS下可能好点,但在UNIX下我就不知如何实现了,请各位高人帮一下忙,能给思路已经很感激了,如果有源代码将更好.我先谢过大家了.

用pipe 和 dup2.  man 2 pipe dup2

#include 
#include 
#include 
#include 
#include 
#include 

int main(int argc, char *argv[])
{
        int pfd[2];
        pid_t cpid;
        char buf;

        assert(argc == 2);

        if (pipe(pfd) == -1) { perror("pipe"); exit(EXIT_FAILURE); }

        cpid = fork();
        if (cpid == -1) { perror("fork"); exit(EXIT_FAILURE); }

        if (cpid == 0) {    /* Child reads from pipe */
                close(pfd[1]);          /* Close unused write end */
                if (dup2(pfd[0], STDIN_FILENO) == -1) {
                        perror("dup2");
                        exit(EXIT_FAILURE);
                }

                while (read(STDIN_FILENO, &buf, 1) > 0)
                        write(STDOUT_FILENO, &buf, 1);

                close(STDIN_FILENO);
                close(pfd[0]);
                _exit(EXIT_SUCCESS);

        } else {            /* Parent writes argv[1] to pipe */
                close(pfd[0]);          /* Close unused read end */
                if (dup2(pfd[1], STDOUT_FILENO) == -1) {
                        perror("dup2");
                        exit(EXIT_FAILURE);
                }
                printf("%sn", argv[1]);
                fflush(stdout);
                close(STDOUT_FILENO);
                close(pfd[1]);          /* Reader will see EOF */
                wait(NULL);             /* Wait for child */
                exit(EXIT_SUCCESS);
        }
}

如果是要在你的程序里执行其他程序，直接用popen也挺方便的
stream=popen("ps -ef|grep mplayer","r");
if(stream!=NULL)
{
        memset(buff,0,sizeof(buff));
        while(fgets(buff,512,stream))
        {
                p=strtok(buff," ");
                if(p==NULL)break ;
                if(strlen(p)==0)
                break;
                if((pidnum=atoi(p))==0)
                break;
                splaypid=(pid_t)pidnum;
                kill(splaypid,SIGKILL);
        }
        pclose(stream);
}

#include 
int main(int argc, char *argv[])
{
        char buf[128];
        FILE *pp;
int i=0;
        if( (pp = popen("test.sh", "r")) == NULL )
        {
                printf("popen() error!n");
                exit(1);
        }

        while(fgets(buf, sizeof buf, pp))
        {
i++;
                printf("%s", buf);
        }
        pclose(pp);
        return 0;
}