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test-fd-util: add test case for fd_reopen()

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This commit is contained in:
Lennart Poettering 2021-10-22 14:04:28 +02:00
parent d6274e6b8f
commit 61fb966ccc
1 changed files with 96 additions and 0 deletions
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96
src/test/test-fd-util.c
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@ -286,6 +286,101 @@ static void test_format_proc_fd_path(void) {
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);
@ -299,6 +394,7 @@ int main(int argc, char *argv[]) {
test_read_nr_open();
test_close_all_fds();
test_format_proc_fd_path();
test_fd_reopen();
return 0;
}