p11-8.c

来自「SUN Solaris8平台下进程间通信」· C语言 代码 · 共 29 行

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <unistd.h>
#include "err_exit.h"
#define FIFO_FILE       "myfifo"
#define TEN_MEG          1024*1024*10
int main(void)
{
    int fifo_fd, i, n, total_bytes = 0;
    char sendbuf[PIPE_BUF+1];
    /* 打开FIFO文件 */
    if ((fifo_fd = open(FIFO_FILE, O_WRONLY)) <0 ){
        printf( "Could not open fifo %s\n", FIFO_FILE);
        exit(EXIT_FAILURE);
    }
    printf("Process %d opened: %s\n", getpid(), FIFO_FILE);
    do {
        if ((n = write(fifo_fd, sendbuf, PIPE_BUF)) == -1) 
            err_exit("FIFO broken");
        printf(" %d write %d bytes\n", getpid(),n);
        total_bytes += n;
    }while (total_bytes < TEN_MEG);
    close(fifo_fd);
    printf("Process %d finished\n", getpid());
    return(EXIT_SUCCESS);
}