contrib/capsicum-test/rename.cc

   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
  18 const 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
  25 TEST(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
  31 TEST(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 }