assert_se(streq_ptr(FORMAT_PROC_FD_PATH(2147483647), "/proc/self/fd/2147483647"));
}
+static void test_fd_reopen(void) {
+ _cleanup_close_ int fd1 = -1, fd2 = -1;
+ struct stat st1, st2;
+ int fl;
+
+ /* Test this with a directory */
+ fd1 = open("/proc", O_DIRECTORY|O_PATH|O_CLOEXEC);
+ assert_se(fd1 >= 0);
+
+ assert_se(fstat(fd1, &st1) >= 0);
+ assert_se(S_ISDIR(st1.st_mode));
+
+ fl = fcntl(fd1, F_GETFL);
+ assert_se(fl >= 0);
+ assert_se(FLAGS_SET(fl, O_DIRECTORY));
+ assert_se(FLAGS_SET(fl, O_PATH));
+
+ fd2 = fd_reopen(fd1, O_RDONLY|O_DIRECTORY|O_CLOEXEC); /* drop the O_PATH */
+ assert_se(fd2 >= 0);
+
+ assert_se(fstat(fd2, &st2) >= 0);
+ assert_se(S_ISDIR(st2.st_mode));
+ assert_se(st1.st_ino == st2.st_ino);
+ assert_se(st1.st_rdev == st2.st_rdev);
+
+ fl = fcntl(fd2, F_GETFL);
+ assert_se(fl >= 0);
+ assert_se(FLAGS_SET(fl, O_DIRECTORY));
+ assert_se(!FLAGS_SET(fl, O_PATH));
+
+ safe_close(fd1);
+
+ fd1 = fd_reopen(fd2, O_DIRECTORY|O_PATH|O_CLOEXEC); /* reacquire the O_PATH */
+ assert_se(fd1 >= 0);
+
+ assert_se(fstat(fd1, &st1) >= 0);
+ assert_se(S_ISDIR(st1.st_mode));
+ assert_se(st1.st_ino == st2.st_ino);
+ assert_se(st1.st_rdev == st2.st_rdev);
+
+ fl = fcntl(fd1, F_GETFL);
+ assert_se(fl >= 0);
+ assert_se(FLAGS_SET(fl, O_DIRECTORY));
+ assert_se(FLAGS_SET(fl, O_PATH));
+
+ safe_close(fd1);
+
+ /* And now, test this with a file. */
+ fd1 = open("/proc/version", O_PATH|O_CLOEXEC);
+ assert_se(fd1 >= 0);
+
+ assert_se(fstat(fd1, &st1) >= 0);
+ assert_se(S_ISREG(st1.st_mode));
+
+ fl = fcntl(fd1, F_GETFL);
+ assert_se(fl >= 0);
+ assert_se(!FLAGS_SET(fl, O_DIRECTORY));
+ assert_se(FLAGS_SET(fl, O_PATH));
+
+ assert_se(fd_reopen(fd1, O_RDONLY|O_DIRECTORY|O_CLOEXEC) == -ENOTDIR);
+ fd2 = fd_reopen(fd1, O_RDONLY|O_CLOEXEC); /* drop the O_PATH */
+ assert_se(fd2 >= 0);
+
+ assert_se(fstat(fd2, &st2) >= 0);
+ assert_se(S_ISREG(st2.st_mode));
+ assert_se(st1.st_ino == st2.st_ino);
+ assert_se(st1.st_rdev == st2.st_rdev);
+
+ fl = fcntl(fd2, F_GETFL);
+ assert_se(fl >= 0);
+ assert_se(!FLAGS_SET(fl, O_DIRECTORY));
+ assert_se(!FLAGS_SET(fl, O_PATH));
+
+ safe_close(fd1);
+
+ assert_se(fd_reopen(fd2, O_DIRECTORY|O_PATH|O_CLOEXEC) == -ENOTDIR);
+ fd1 = fd_reopen(fd2, O_PATH|O_CLOEXEC); /* reacquire the O_PATH */
+ assert_se(fd1 >= 0);
+
+ assert_se(fstat(fd1, &st1) >= 0);
+ assert_se(S_ISREG(st1.st_mode));
+ assert_se(st1.st_ino == st2.st_ino);
+ assert_se(st1.st_rdev == st2.st_rdev);
+
+ fl = fcntl(fd1, F_GETFL);
+ assert_se(fl >= 0);
+ assert_se(!FLAGS_SET(fl, O_DIRECTORY));
+ assert_se(FLAGS_SET(fl, O_PATH));
+
+ /* Also check the right error is generated if the fd is already closed */
+ safe_close(fd1);
+ assert_se(fd_reopen(fd1, O_RDONLY|O_CLOEXEC) == -EBADF);
+ fd1 = -1;
+}
+
int main(int argc, char *argv[]) {
test_setup_logging(LOG_DEBUG);
test_read_nr_open();
test_close_all_fds();
test_format_proc_fd_path();
+ test_fd_reopen();
return 0;
}