21 lines
474 B
C
21 lines
474 B
C
#include <stdio.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 <string.h>
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int main() {
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int testdev = open("/dev/mydev", O_RDWR);
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if (testdev == -1) {
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printf("can not open file\n");
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exit(0);
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}
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char buf[50] = "pear to dev!";
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write(testdev, buf, 50);
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printf("write: %s\n", buf);
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strcpy(buf, "apple to dev!");
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read(testdev, buf, 50);
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printf("read: %s\n", buf);
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close(testdev);
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return 0;
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} |