2 * Check decoding of mount syscall.
4 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 #include <sys/mount.h>
36 # define MS_MGC_VAL 0xC0ED0000
40 # define MS_RELATIME (1ul << 21)
43 #define str_ro_nosuid_nodev_noexec "MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC"
48 static const char source[] = "mount_source";
49 static const char target[] = "mount_target";
50 static const char fstype[] = "mount_fstype";
51 static const char data[] = "mount_data";
53 int rc = mount(source, target, fstype, 15, data);
54 printf("mount(\"%s\", \"%s\", \"%s\", %s, \"%s\") = %d %s (%m)\n",
55 source, target, fstype, str_ro_nosuid_nodev_noexec,
56 data, rc, errno2name());
58 rc = mount(source, target, fstype, MS_RELATIME | 15, data);
59 printf("mount(\"%s\", \"%s\", \"%s\", %s, \"%s\") = %d %s (%m)\n",
60 source, target, fstype,
61 str_ro_nosuid_nodev_noexec "|MS_RELATIME",
62 data, rc, errno2name());
64 rc = mount(source, target, fstype, MS_MGC_VAL, data);
65 printf("mount(\"%s\", \"%s\", \"%s\", %s, \"%s\") = %d %s (%m)\n",
66 source, target, fstype, "MS_MGC_VAL", data, rc, errno2name());
68 rc = mount(source, target, fstype, MS_MGC_VAL | 15, data);
69 printf("mount(\"%s\", \"%s\", \"%s\", %s, \"%s\") = %d %s (%m)\n",
70 source, target, fstype,
71 "MS_MGC_VAL|" str_ro_nosuid_nodev_noexec,
72 data, rc, errno2name());
74 rc = mount(source, target, fstype, MS_REMOUNT, data);
75 printf("mount(\"%s\", \"%s\", %p, %s, \"%s\") = %d %s (%m)\n",
76 source, target, fstype, "MS_REMOUNT", data, rc, errno2name());
78 rc = mount(source, target, fstype, MS_BIND, data);
79 printf("mount(\"%s\", \"%s\", %p, %s, %p) = %d %s (%m)\n",
80 source, target, fstype, "MS_BIND", data, rc, errno2name());
82 puts("+++ exited with 0 +++");