1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "sandbox/linux/services/proc_util.h"
6
7 #include <fcntl.h>
8 #include <unistd.h>
9
10 #include "base/files/scoped_file.h"
11 #include "base/posix/eintr_wrapper.h"
12 #include "testing/gtest/include/gtest/gtest.h"
13
14 namespace sandbox {
15
TEST(ProcUtil,CountOpenFds)16 TEST(ProcUtil, CountOpenFds) {
17 base::ScopedFD proc_fd(open("/proc/", O_RDONLY | O_DIRECTORY));
18 ASSERT_TRUE(proc_fd.is_valid());
19 int fd_count = ProcUtil::CountOpenFds(proc_fd.get());
20 int fd = open("/dev/null", O_RDONLY);
21 ASSERT_LE(0, fd);
22 EXPECT_EQ(fd_count + 1, ProcUtil::CountOpenFds(proc_fd.get()));
23 ASSERT_EQ(0, IGNORE_EINTR(close(fd)));
24 EXPECT_EQ(fd_count, ProcUtil::CountOpenFds(proc_fd.get()));
25 }
26
TEST(ProcUtil,HasOpenDirectory)27 TEST(ProcUtil, HasOpenDirectory) {
28 // No open directory should exist at startup.
29 EXPECT_FALSE(ProcUtil::HasOpenDirectory());
30 {
31 // Have a "/proc" file descriptor around.
32 int proc_fd = open("/proc/", O_RDONLY | O_DIRECTORY);
33 base::ScopedFD proc_fd_closer(proc_fd);
34 EXPECT_TRUE(ProcUtil::HasOpenDirectory());
35 }
36 EXPECT_FALSE(ProcUtil::HasOpenDirectory());
37 }
38
TEST(ProcUtil,HasOpenDirectoryWithFD)39 TEST(ProcUtil, HasOpenDirectoryWithFD) {
40 int proc_fd = open("/proc/", O_RDONLY | O_DIRECTORY);
41 base::ScopedFD proc_fd_closer(proc_fd);
42 ASSERT_LE(0, proc_fd);
43
44 // Don't pass |proc_fd|, an open directory (proc_fd) should
45 // be detected.
46 EXPECT_TRUE(ProcUtil::HasOpenDirectory());
47 // Pass |proc_fd| and no open directory should be detected.
48 EXPECT_FALSE(ProcUtil::HasOpenDirectory(proc_fd));
49
50 {
51 // Have a directory file descriptor around.
52 int open_directory_fd = open("/proc/self/", O_RDONLY | O_DIRECTORY);
53 base::ScopedFD open_directory_fd_closer(open_directory_fd);
54 EXPECT_TRUE(ProcUtil::HasOpenDirectory(proc_fd));
55 }
56
57 // The "/proc/" file descriptor should now be closed, |proc_fd| is the
58 // only directory file descriptor open.
59 EXPECT_FALSE(ProcUtil::HasOpenDirectory(proc_fd));
60 }
61
62 } // namespace sandbox
63