Warning: That file was not part of the compilation database. It may have many parsing errors.

1/* Copyright (C) 2014-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
17
18#include <stdio.h>
19#include <errno.h>
20#include <pthread.h>
21#include <stdbool.h>
22#include <unistd.h>
23
24/* The test must run under a non-privileged user ID. */
25static const uid_t test_uid = 1;
26
27static pthread_barrier_t barrier1;
28static pthread_barrier_t barrier2;
29
30#define FAIL(fmt, ...) \
31 do { printf ("FAIL: " fmt "\n", __VA_ARGS__); _exit (1); } while (0)
32
33#define FAIL_ERR(fmt, ...) \
34 do { printf ("FAIL: " fmt ": %m\n", __VA_ARGS__); _exit (1); } while (0)
35
36/* True if x is not a successful return code from pthread_barrier_wait. */
37static inline bool
38is_invalid_barrier_ret (int x)
39{
40 return x != 0 && x != PTHREAD_BARRIER_SERIAL_THREAD;
41}
42
43static void *
44thread_func (void *ctx __attribute__ ((unused)))
45{
46 int ret = pthread_barrier_wait (&barrier1);
47 if (is_invalid_barrier_ret (ret))
48 FAIL ("pthread_barrier_wait (barrier1) (on thread): %d", ret);
49 ret = pthread_barrier_wait (&barrier2);
50 if (is_invalid_barrier_ret (ret))
51 FAIL ("pthread_barrier_wait (barrier2) (on thread): %d", ret);
52 return NULL;
53}
54
55static void
56setuid_failure (int phase)
57{
58 int ret = setuid (0);
59 switch (ret)
60 {
61 case 0:
62 FAIL ("setuid succeeded unexpectedly in phase %d", phase);
63 case -1:
64 if (errno != EPERM)
65 FAIL_ERR ("setuid phase %d", phase);
66 break;
67 default:
68 FAIL ("invalid setuid return value in phase %d: %d", phase, ret);
69 }
70}
71
72static int
73do_test (void)
74{
75 if (getuid () == 0)
76 if (setuid (test_uid) != 0)
77 FAIL_ERR ("setuid (%u)", (unsigned) test_uid);
78 if (setuid (getuid ()))
79 FAIL_ERR ("setuid (%s)", "getuid ()");
80 setuid_failure (1);
81
82 int ret = pthread_barrier_init (&barrier1, NULL, 2);
83 if (ret != 0)
84 FAIL ("pthread_barrier_init (barrier1): %d", ret);
85 ret = pthread_barrier_init (&barrier2, NULL, 2);
86 if (ret != 0)
87 FAIL ("pthread_barrier_init (barrier2): %d", ret);
88
89 pthread_t thread;
90 ret = pthread_create (&thread, NULL, thread_func, NULL);
91 if (ret != 0)
92 FAIL ("pthread_create: %d", ret);
93
94 /* Ensure that the thread is running properly. */
95 ret = pthread_barrier_wait (&barrier1);
96 if (is_invalid_barrier_ret (ret))
97 FAIL ("pthread_barrier_wait (barrier1): %d", ret);
98
99 setuid_failure (2);
100
101 /* Check success case. */
102 if (setuid (getuid ()) != 0)
103 FAIL_ERR ("setuid (%s)", "getuid ()");
104
105 /* Shutdown. */
106 ret = pthread_barrier_wait (&barrier2);
107 if (is_invalid_barrier_ret (ret))
108 FAIL ("pthread_barrier_wait (barrier2): %d", ret);
109
110 ret = pthread_join (thread, NULL);
111 if (ret != 0)
112 FAIL ("pthread_join: %d", ret);
113
114 return 0;
115}
116
117#define TEST_FUNCTION do_test ()
118#include "../test-skeleton.c"
119

Warning: That file was not part of the compilation database. It may have many parsing errors.