28 lines
522 B
C
28 lines
522 B
C
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#include "stdio.h"
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#include "unistd.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 "string.h"
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int main(int argc, char *argv[])
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{
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int fd;
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char buf[32];
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char write_buf[] = "write_success";
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char filename[32] = "/dev/test";
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fd = open(filename, O_RDWR);
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if(fd < 0){
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printf("file %s open failed!\r\n", argv[1]);
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return -1;
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}
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read(fd,buf,sizeof(buf));
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write(fd,write_buf,sizeof(write_buf));
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printf("%s\n",buf);
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printf("open *******\n");
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close(fd);
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return 0;
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}
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