- #include <stdio.h>
- #include <stdlib.h>
- #include <unistd.h>
- #include <sys/types.h>
- #include <sys/ioctl.h>
- #include <fcntl.h>
- #include <string.h>
- #include <linux/fd.h>
- #include <sys/mount.h>
- #include <scsi/scsi.h>
- #include <scsi/sg.h>
- #include <scsi/scsi_ioctl.h>
- int main(int argc, char *argv[])
- {
- int fd = -1;
- char *device;
- if (argc != 2)
- {
- printf("usage: usb-s /dev/sde1");
- return -1;
- }
- device = strdup(argv[1]);
- if ((fd = open(device, O_RDONLY|O_NONBLOCK)) < 0)
- {
- printf("open device %s failed!\\n", device);
- free(device);
- return -1;
- }
- int status, k;
- sg_io_hdr_t io_hdr;
- unsigned char allowRmBlk[6] = {ALLOW_MEDIUM_REMOVAL, 0, 0, 0, 0, 0};
- unsigned char startStop1Blk[6] = {START_STOP, 0, 0, 0, 1, 0};
- unsigned char startStop2Blk[6] = {START_STOP, 0, 0, 0, 2, 0};
- unsigned char inqBuff[2];
- unsigned char sense_buffer[32];
- if ((ioctl(fd, SG_GET_VERSION_NUM, &k) < 0) || (k < 30000)) {
- printf("not an sg device, or old sg driver\\n");
- goto out;
- }
- memset(&io_hdr, 0, sizeof(sg_io_hdr_t));
- io_hdr.interface_id = 'S';
- io_hdr.cmd_len = 6;
- io_hdr.mx_sb_len = sizeof(sense_buffer);
- io_hdr.dxfer_direction = SG_DXFER_NONE;
- io_hdr.dxfer_len = 0;
- io_hdr.dxferp = inqBuff;
- io_hdr.sbp = sense_buffer;
- io_hdr.timeout = 10000;
- io_hdr.cmdp = allowRmBlk;
- status = ioctl(fd, SG_IO, (void *)&io_hdr);
- if (status < 0)
- {
- goto out;
- }
- io_hdr.cmdp = startStop1Blk;
- status = ioctl(fd, SG_IO, (void *)&io_hdr);
- if (status < 0)
- {
- goto out;
- }
- io_hdr.cmdp = startStop2Blk;
- status = ioctl(fd, SG_IO, (void *)&io_hdr);
- if (status < 0)
- {
- goto out;
- }
- /* force kernel to reread partition table when new disc inserted */
- status = ioctl(fd, BLKRRPART);
- out:
- close(fd);
- free(device);
- return 0;
- }
- //该片段来自于http://www.codesnippet.cn/detail/240120131911.html
来源: http://www.codesnippet.cn/detail/240120131911.html