1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
/*
* Test -l/--syscall-limit options.
*
* Copyright (c) 2023 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#ifndef PRINT_VALID
# define PRINT_VALID 1
#endif
static int
write_status(const char *name, int value)
{
FILE *fp = fopen(name, "w");
if (!fp)
perror_msg_and_fail("fopen: %s", name);
if (fprintf(fp, "%d\n", value) <= 0)
perror_msg_and_fail("fprintf: %s", name);
if (fclose(fp))
perror_msg_and_fail("fclose: %s", name);
fflush(stdout);
return value;
}
static const char valid_path[] = ".";
static const char invalid_path[] = "invalid.dir";
static void
test_chdir(int pid, bool print)
{
if (chdir(valid_path))
perror_msg_and_fail("chdir: %s", valid_path);
if (print) {
#if PRINT_VALID
printf("%-5u chdir(\"%s\") = 0\n", pid, valid_path);
#else
if (chdir(invalid_path) == 0)
error_msg_and_fail("chdir: %s", invalid_path);
printf("%-5u chdir(\"%s\") = %s\n", pid, invalid_path, sprintrc(-1));
#endif
} else {
if (chdir(invalid_path) == 0)
error_msg_and_fail("chdir: %s", invalid_path);
}
}
static void
test_rmdir(int pid, bool print)
{
#ifndef AT_FDCWD
# define AT_FDCWD -100
#endif
#ifndef AT_REMOVEDIR
# define AT_REMOVEDIR 0x200
#endif
if (syscall(__NR_unlinkat, AT_FDCWD, "invalid.dir", AT_REMOVEDIR) == 0)
error_msg_and_fail("unlinkat: %s", invalid_path);
if (print)
printf("%-5u unlinkat(AT_FDCWD, \"%s\", AT_REMOVEDIR) = %s\n",
pid, invalid_path, sprintrc(-1));
}
int
main(void)
{
int pid = getpid();
test_chdir(pid, /* print */ true);
fflush(stdout);
pid_t child = fork();
if (child < 0)
perror_msg_and_fail("fork");
if (child == 0) {
int pid = getpid();
test_rmdir(pid, /* print */ true);
test_chdir(pid, /* print */ true);
/* the tracer is expected to detach at this point */
test_rmdir(pid, /* print */ false);
exit(0);
}
int status;
while ((waitpid(child, &status, 0)) != child) {
if (errno == EINTR)
continue;
perror_msg_and_fail("waitpid: %d", child);
}
/* the tracer is expected to detach at this point */
test_chdir(pid, /* print */ false);
return write_status("parent_status",
WIFEXITED(status) ? WEXITSTATUS(status) : 1);
}
|
