Attachment 271 Details for Bug 544 – fdpasstest.c: test for descriptor-passing bug on Linux 2.0

fdpasstest.c: test for descriptor-passing bug on Linux 2.0

fdpasstest.c (text/plain), 1.11 KB, created by Darren Tucker on 2003-04-19 16:33:33 AEST

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Creator: Darren Tucker

Created: 2003-04-19 16:33:33 AEST

Size: 1.11 KB

patch

obsolete

>#include <stdio.h>
>#include <sys/types.h>
>#include <sys/socket.h>
>#include <iovec.h>	/* comment out for 2.4 kernels */
>
>int
>main()
>{
>	int pid, pair[2];
>	char tmp[CMSG_SPACE(sizeof(int))];
>	struct cmsghdr *cmsg;
>	struct msghdr msg;
>	struct iovec vec;
>	char ch = '\0';
>	ssize_t n;
>
>	if (socketpair(AF_UNIX, SOCK_STREAM, 0, pair) == -1) {
>		perror("socketpair");
>		exit(1);
>	}
>
>	memset(&msg, 0, sizeof(msg));
>	msg.msg_control = (caddr_t)tmp;
>	msg.msg_controllen = CMSG_LEN(sizeof(int));
>	cmsg = CMSG_FIRSTHDR(&msg);
>	cmsg->cmsg_len = CMSG_LEN(sizeof(int));
>
>	vec.iov_base = &ch;
>	vec.iov_len = 1;
>	msg.msg_iov = &vec;
>	msg.msg_iovlen = 1;
>
>	if (fork() == 0) { /* child, send fd */
>		cmsg->cmsg_level = SOL_SOCKET;
>		cmsg->cmsg_type = SCM_RIGHTS;
>		*(int *)CMSG_DATA(cmsg) = 0; /* send stdin descriptor */
>		sendmsg(pair[0], &msg, 0);
>		exit(0);
>	} else { /* parent, receive fd */
>		recvmsg(pair[1], &msg, 0);
>		cmsg = CMSG_FIRSTHDR(&msg);
>		if (cmsg->cmsg_type != SCM_RIGHTS)
>			printf("test failed, expected type %d got %d\n", SCM_RIGHTS, cmsg->cmsg_type);
>		else
>			printf("test passed, cmsg_type %d\n", cmsg->cmsg_type);
>		abort();
>	}
>
>}
>

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