1#include <fcntl.h>
2#include <sys/stat.h>
3
4#include "./capsicum-test.h"
5
6// There was a Capsicum-related regression in FreeBSD renameat,
7// which affects certain cases independent of Capsicum or capability mode
8//
9// added to test the renameat syscall for the case that
10//    - the "to" file already exists
11//    - the "to" file is specified by an absolute path
12//    - the "to" file descriptor is used
13//          (this descriptor should be ignored if absolute path is provided)
14//
15// details at: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=222258
16
17
18const char * create_tmp_src(const char* filename) {
19    const char *src_path = TmpFile(filename);
20    int src_fd = open(src_path, O_CREAT|O_RDWR, 0644);
21    close(src_fd);
22    return src_path;
23}
24
25TEST(Rename, AbsDesignationSame) {
26    const char *src_path = create_tmp_src("rename_test");
27    EXPECT_OK(rename(src_path, src_path));
28    unlink(src_path);
29}
30
31TEST(RenameAt, AbsDesignationSame) {
32    const char *src_path = create_tmp_src("renameat_test");
33    const char *dir_path = TmpFile("renameat_test_dir");
34
35    EXPECT_OK(mkdir(dir_path, 0755));
36    // random temporary directory descriptor
37    int dfd = open(dir_path, O_DIRECTORY);
38
39    // Various rename from/to the same absolute path; in each case the source
40    // and dest directory FDs should be irrelevant.
41    EXPECT_OK(renameat(AT_FDCWD, src_path, AT_FDCWD, src_path));
42    EXPECT_OK(renameat(AT_FDCWD, src_path, dfd, src_path));
43    EXPECT_OK(renameat(dfd, src_path, AT_FDCWD, src_path));
44    EXPECT_OK(renameat(dfd, src_path, dfd, src_path));
45
46    close(dfd);
47    rmdir(dir_path);
48    unlink(src_path);
49}
50