--- /dev/null
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/file.h>
+#include <sys/uio.h>
+#include <sys/un.h>
+
+#include <stdio.h>
+#include <signal.h>
+
+struct sockaddr_un to;
+struct sockaddr_un from;
+struct msghdr msg;
+struct iovec iov[1];
+char myname[1024];
+
+int catchsig();
+
+main(argc, argv)
+ char *argv[];
+{
+ int s, len, tolen, fromlen, fd;
+ char buf[BUFSIZ];
+ struct stat sb;
+
+ if (argc < 3) {
+ printf("usage: %s socket file\n", argv[0]);
+ exit(1);
+ }
+ if (stat(argv[1], &sb) < 0) {
+ perror(argv[1]);
+ exit(1);
+ }
+ if ((sb.st_mode & S_IFMT) != S_IFSOCK) {
+ printf("%s: not a socket\n", argv[1]);
+ exit(1);
+ }
+ fd = open(argv[2], O_RDONLY);
+ if (fd < 0) {
+ perror(argv[2]);
+ exit(1);
+ }
+ s = socket(AF_UNIX, SOCK_DGRAM, 0);
+ if (s < 0) {
+ perror("socket");
+ exit(1);
+ }
+ from.sun_family = AF_UNIX;
+ sprintf(myname, "client%d", getpid());
+ strcpy(from.sun_path, myname);
+ if (bind(s, &from, strlen(from.sun_path) + 2) < 0) {
+ perror("fdclient: bind");
+ exit(1);
+ }
+ signal(SIGPIPE, catchsig);
+ signal(SIGINT, catchsig);
+ to.sun_family = AF_UNIX;
+ strcpy(to.sun_path, argv[1]);
+ strcpy(buf, myname);
+ len = strlen(buf);
+ tolen = strlen(to.sun_path) + 2;
+ printf("Client: send greeting from %s\n", myname); fflush(stdout);
+ if (sendto(s, buf, len, 0, &to, tolen) < 0) {
+ perror("fdclient: sendto");
+ goto bad;
+ }
+ *from.sun_path = '\0';
+ fromlen = sizeof (from);
+ len = recvfrom(s, buf, sizeof (buf), 0, &from, &fromlen);
+ if (len < 0) {
+ perror("fdclient: recvfrom");
+ goto bad;
+ }
+ printf("Client: message received");
+ if (strlen(from.sun_path) > 0)
+ printf(" from %s", from.sun_path);
+ if (len > 0)
+ printf(" \"%.*s\"", len, buf);
+ putchar('\n'); fflush(stdout);
+ msg.msg_name = (caddr_t)&to;
+ msg.msg_namelen = tolen;
+ iov->iov_base = argv[2];
+ iov->iov_len = strlen(argv[2]);
+ msg.msg_iov = iov;
+ msg.msg_iovlen = 1;
+ msg.msg_accrights = (caddr_t)&fd;
+ msg.msg_accrightslen = sizeof (fd);
+ printf("Client: send \"%s\"\n", argv[2]); fflush(stdout);
+ if (sendmsg(s, &msg, 0) < 0) {
+ perror("fdclient: sendmsg");
+ goto bad;
+ }
+/*
+ *from.sun_path = '\0';
+ fromlen = sizeof (from);
+ len = recvfrom(s, buf, sizeof (buf), 0, &from, &fromlen);
+ if (len < 0) {
+ perror("fdclient: recvfrom");
+ goto bad;
+ }
+ printf("Client: message received");
+ if (strlen(from.sun_path) > 0)
+ printf(" from %s", from.sun_path);
+ if (len > 0)
+ printf(" \"%.*s\"", len, buf);
+ putchar('\n'); fflush(stdout);
+*/
+bad:
+ unlink(myname);
+}
+
+catchsig(s)
+ int s;
+{
+
+ psignal(s, "Client");
+ unlink(myname);
+ exit(1);
+}