jerry.c

用五个实例来解释linux下的c编程

/* jerry.c v3.0 */

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

#define FIFO "message.fifo"
#define MSG "from TOM: "

int main()
{
  int fifo;
  char buf[BUFSIZ];
  ssize_t s;

  /* Open file for read. */
  fifo = open(FIFO, O_RDONLY);
  if(fifo < 0) {
    perror("open");
  }

  write(STDOUT_FILENO, MSG, sizeof(MSG)-1);
  /* Read message. */
  do {
    s = read(fifo, &buf, BUFSIZ);
    write(STDOUT_FILENO, &buf, s);
  } while (s>0);
  /* Close file. */
  close(fifo);
  
  exit(EXIT_SUCCESS);
}