41 lines
677 B
C
41 lines
677 B
C
#include <stdio.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#define LTKB_IOC_HEADER 'b'
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#define LTKB_IOC_RESET _IO(LTKB_IOC_HEADER, 0)
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#define LTKB_IOC_PING _IOWR(LTKB_IOC_HEADER, 1, char)
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#define LTKB_IOC_MAXNR 1
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int main(void)
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{
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int fd;
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if ((fd=open("ltkb0", O_RDWR|O_SYNC))<0)
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{
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perror("open");
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exit(-1);
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}
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char buffer[200] = "hello";
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write(fd, (void *)&buffer, 6);
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char c = 'a';
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printf("%c ",c);
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ioctl(fd, LTKB_IOC_PING, &c);
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printf("%c ",c);
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ioctl(fd, LTKB_IOC_PING, &c);
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printf("%c\n",c);
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close(fd);
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return(0);
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}
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