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#define _GNU_SOURCE
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "file.h"
#include "parameter.h"
// utility to check hardlink count of file.
static int check_hardlink_count(const char *filename) {
struct stat buf;
stat(filename, &buf);
return buf.st_nlink;
}
int break_cowlink(const char *s);
void test_break_cowlink() {
char *temp = strdupa("/tmp/cowtestXXXXXX");
char *temp2 = strdupa("/tmp/cowtestXXXXXX");
close(mkstemp(temp));
close(mkstemp(temp2));
assert(check_hardlink_count(temp2) == 1);
assert(check_hardlink_count(temp) == 1);
assert(-1 != unlink(temp2));
assert(-1 != link(temp, temp2));
assert(check_hardlink_count(temp2) == 2);
assert(check_hardlink_count(temp) == 2);
break_cowlink(temp2);
assert(check_hardlink_count(temp2) == 1);
assert(check_hardlink_count(temp) == 1);
}
int main() {
test_break_cowlink();
return 0;
}
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