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95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2008-2020 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#define _GNU_SOURCE
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <sys/un.h>
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#include <unistd.h>
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void
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marker1 (void)
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{
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}
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void
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marker2 (void)
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{
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}
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char wdata[] = "abcdef";
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struct iovec wv[1] = {
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{ wdata, 6 },
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};
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char wc[CMSG_SPACE (sizeof (struct ucred)) + CMSG_SPACE (sizeof (int))];
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struct msghdr wmsg = {
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0, 0,
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wv, 1,
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wc, sizeof wc,
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0,
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};
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char rdata[5] = "xxxx";
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struct iovec rv[2] = {
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{&rdata[2], 2},
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{&rdata[0], 2},
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};
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char rc[CMSG_SPACE (sizeof (struct ucred)) + 7];
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struct msghdr rmsg = {
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0, 0,
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rv, 2,
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rc, sizeof rc,
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0,
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};
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int fds[2];
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int
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main (void)
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{
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int itrue = 1;
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/* prepare cmsg to send */
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struct cmsghdr *cm1 = CMSG_FIRSTHDR (&wmsg);
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cm1->cmsg_len = CMSG_LEN (sizeof (struct ucred));
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cm1->cmsg_level = AF_UNIX;
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cm1->cmsg_type = SCM_CREDENTIALS;
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struct ucred *uc = (void *) CMSG_DATA (cm1);
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uc->pid = getpid ();
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uc->uid = getuid ();
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uc->gid = getgid ();
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struct cmsghdr *cm2 = CMSG_NXTHDR (&wmsg, cm1);
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cm2->cmsg_len = CMSG_LEN (sizeof (int));
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cm2->cmsg_level = AF_UNIX;
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cm2->cmsg_type = SCM_RIGHTS;
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int *pfd = (void *) CMSG_DATA (cm2);
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*pfd = 2;
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/* do the syscalls */
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marker1 ();
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socketpair (AF_UNIX, SOCK_DGRAM, 0, fds);
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setsockopt (fds[0], SOL_SOCKET, SO_PASSCRED, &itrue, sizeof itrue);
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sendmsg (fds[1], &wmsg, 0);
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recvmsg (fds[0], &rmsg, 0);
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marker2 ();
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return 0;
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}
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