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
117
118
|
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2013 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <sys/mman.h>
#include "log.h"
#include "macro.h"
#include "util.h"
#include "sd-memfd.h"
int main(int argc, char *argv[]) {
sd_memfd *m;
char *s;
uint64_t sz;
int r, fd;
FILE *f;
log_set_max_level(LOG_DEBUG);
r = sd_memfd_new(&m);
if (r == -ENOENT)
return EXIT_TEST_SKIP;
r = sd_memfd_map(m, 0, 6, (void**) &s);
assert_se(r >= 0);
strcpy(s, "hallo");
r = sd_memfd_set_sealed(m, 1);
assert_se(r == -EPERM);
assert_se(write(sd_memfd_get_fd(m), "he", 2) == 2);
assert_se(write(sd_memfd_get_fd(m), "HE", 2) == 2);
log_error("lseek = %llu", (unsigned long long) lseek(sd_memfd_get_fd(m), 0, SEEK_CUR));
log_info("<%s>", s);
access("HUHU", F_OK);
assert_se(sd_memfd_get_file(m, &f) >= 0);
fputc('L', f);
fflush(f);
access("HAHA", F_OK);
log_info("<%s>", s);
assert_se(munmap(s, 6) == 0);
r = sd_memfd_get_sealed(m);
assert_se(r == 0);
r = sd_memfd_get_size(m, &sz);
assert_se(r >= 0);
assert_se(sz = page_size());
r = sd_memfd_set_size(m, 6);
assert_se(r >= 0);
r = sd_memfd_set_sealed(m, 1);
assert_se(r >= 0);
r = sd_memfd_get_sealed(m);
assert_se(r == 1);
fd = sd_memfd_dup_fd(m);
assert_se(fd >= 0);
sd_memfd_free(m);
r = sd_memfd_make(fd, &m);
assert_se(r >= 0);
r = sd_memfd_get_size(m, &sz);
assert_se(r >= 0);
assert_se(sz = 6);
r = sd_memfd_map(m, 0, 6, (void**) &s);
assert_se(r >= 0);
r = sd_memfd_set_sealed(m, 1);
assert_se(r == -EALREADY);
r = sd_memfd_set_sealed(m, 0);
assert_se(r == -EPERM);
log_info("<%s>", s);
assert_se(streq(s, "heLlo"));
assert_se(munmap(s, 6) == 0);
r = sd_memfd_set_sealed(m, 0);
assert_se(r >= 0);
sd_memfd_free(m);
return 0;
}
|
