45 lines
749 B
C++
45 lines
749 B
C++
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#include <sys/uio.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <fcntl.h>
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int
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main()
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{
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int fd = open("testfile", O_CREAT | O_RDWR, 0666);
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if (fd < 0) {
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printf("file open error %s\n", strerror(errno));
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return 1;
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}
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int dummy;
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int ret;
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iovec vec1 = { &dummy, sizeof(dummy) };
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ret = writev(fd, &vec1, 0x80000001);
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if (ret < 0) {
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printf("vec 1 write error %s\n", strerror(errno));
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}
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iovec vec2 = { (void *)0x80100000, 0x1000 };
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ret = writev(fd, &vec2, 1);
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if (ret < 0) {
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printf("vec 2 write error %s\n", strerror(errno));
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}
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iovec vec3 = { 0, 1 };
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ret = writev(fd, &vec3, 0xfff);
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if (ret < 0) {
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printf("vec 3 write error %s\n", strerror(errno));
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}
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close(fd);
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return 0;
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}
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