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#include <stdio.h>
#include <fcntl.h>
#include <err.h>
#include <sys/stat.h>
int main(int argc, char *argv[])
{
const char *path1;
const char *path2;
struct stat stbuf;
int res;
int fd;
if (argc != 3) {
fprintf(stderr, "usage: %s path1 path2\n", argv[0]);
return 1;
}
path1 = argv[1];
path2 = argv[2];
fd = open(path2, O_RDONLY);
if (fd == -1)
err(1, "open(\"%s\")", path2);
res = rename(path1, path2);
if (res == -1)
err(1, "rename(\"%s\", \"%s\")", path1, path2);
res = fstat(fd, &stbuf);
if (res == -1)
err(1, "fstat(%i)", fd);
if (stbuf.st_nlink != 0) {
fprintf(stderr, "nlink is %lu, should be 0\n",
(unsigned long) stbuf.st_nlink);
return 1;
}
return 0;
}
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