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452b4ba5 MK |
1 | /* This testcase is part of GDB, the GNU debugger. |
2 | ||
e2882c85 | 3 | Copyright 2008-2018 Free Software Foundation, Inc. |
452b4ba5 MK |
4 | |
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 3 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <sys/socket.h> | |
20 | #include <sys/types.h> | |
21 | #include <sys/un.h> | |
22 | #include <unistd.h> | |
23 | ||
24 | void | |
25 | marker1 (void) | |
26 | { | |
27 | } | |
28 | ||
29 | void | |
30 | marker2 (void) | |
31 | { | |
32 | } | |
33 | ||
34 | char wdata[] = "abcdef"; | |
35 | ||
36 | struct iovec wv[1] = { | |
37 | { wdata, 6 }, | |
38 | }; | |
39 | ||
40 | char wc[CMSG_SPACE (sizeof (struct ucred)) + CMSG_SPACE (sizeof (int))]; | |
41 | ||
42 | struct msghdr wmsg = { | |
43 | 0, 0, | |
44 | wv, 1, | |
45 | wc, sizeof wc, | |
46 | 0, | |
47 | }; | |
48 | ||
49 | char rdata[5] = "xxxx"; | |
50 | ||
51 | struct iovec rv[2] = { | |
52 | {&rdata[2], 2}, | |
53 | {&rdata[0], 2}, | |
54 | }; | |
55 | ||
56 | char rc[CMSG_SPACE (sizeof (struct ucred)) + 7]; | |
57 | ||
58 | struct msghdr rmsg = { | |
59 | 0, 0, | |
60 | rv, 2, | |
61 | rc, sizeof rc, | |
62 | 0, | |
63 | }; | |
64 | ||
65 | int fds[2]; | |
66 | ||
67 | int | |
68 | main (void) | |
69 | { | |
70 | int itrue = 1; | |
71 | /* prepare cmsg to send */ | |
72 | struct cmsghdr *cm1 = CMSG_FIRSTHDR (&wmsg); | |
73 | cm1->cmsg_len = CMSG_LEN (sizeof (struct ucred)); | |
74 | cm1->cmsg_level = AF_UNIX; | |
75 | cm1->cmsg_type = SCM_CREDENTIALS; | |
76 | struct ucred *uc = (void *) CMSG_DATA (cm1); | |
77 | uc->pid = getpid (); | |
78 | uc->uid = getuid (); | |
79 | uc->gid = getgid (); | |
80 | struct cmsghdr *cm2 = CMSG_NXTHDR (&wmsg, cm1); | |
81 | cm2->cmsg_len = CMSG_LEN (sizeof (int)); | |
82 | cm2->cmsg_level = AF_UNIX; | |
83 | cm2->cmsg_type = SCM_RIGHTS; | |
84 | int *pfd = (void *) CMSG_DATA (cm2); | |
85 | *pfd = 2; | |
86 | /* do the syscalls */ | |
87 | marker1 (); | |
88 | socketpair (AF_UNIX, SOCK_DGRAM, 0, fds); | |
89 | setsockopt (fds[0], SOL_SOCKET, SO_PASSCRED, &itrue, sizeof itrue); | |
90 | sendmsg (fds[1], &wmsg, 0); | |
91 | recvmsg (fds[0], &rmsg, 0); | |
92 | marker2 (); | |
93 | return 0; | |
94 | } |