eject.c

来自「在linux下多媒体开发实例linux下多媒体开发」· C语言 代码 · 共 40 行

/*
 * eject.c
 * Example program to eject CD.
 */

#include <unistd.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <linux/cdrom.h>

/* CD-ROM device file name */
#define DEVICE "/dev/cdrom"

int main()
{
  int fd;           /* file descriptor for CD-ROM device */
  int status;       /* return status for system calls */

  /* open device */  
  status = fd = open(DEVICE, O_RDONLY);
  if (status < 0) {
    perror("unable to open "DEVICE);
    exit(1);
  }
  /* eject */  
  status = ioctl(fd, CDROMEJECT);
  if (status != 0) {
    perror("CDROMEJECT ioctl failed");
    exit(1);
  }
  /* close device */
  status = close(fd);
  if (status != 0) {
    perror("unable to close "DEVICE);
    exit(1);
  }
  exit(0);
}