7 #include <sys/socket.h>
10 int main(int argc, char *argv[]) {
15 fprintf(stderr, "Write to and read from a Unix domain socket.\n\nUsage: %s <socket>\n", argv[0]);
19 size_t addrlen = strlen(argv[1]);
21 /* Allocate enough space for arbitrary-length paths */
22 char addrbuf[offsetof(struct sockaddr_un, sun_path) + addrlen + 1];
23 memset(addrbuf, 0, sizeof(addrbuf));
25 struct sockaddr_un *addr = (struct sockaddr_un *)addrbuf;
26 addr->sun_family = AF_UNIX;
27 memcpy(addr->sun_path, argv[1], addrlen+1);
29 int fd = socket(AF_UNIX, SOCK_STREAM, 0);
31 fprintf(stderr, "Failed to create socket: %s\n", strerror(errno));
35 if (connect(fd, (struct sockaddr*)addr, sizeof(addrbuf)) < 0) {
36 fprintf(stderr, "Can't connect to `%s': %s\n", argv[1], strerror(errno));
40 /* Check if stdin refers to a terminal */
41 if (!isatty(fileno(stdin))) {
42 /* Read from stdin and write to socket */
43 while (0 < (r = fread(buf, 1, sizeof(buf), stdin))) {
48 /* Read from socket and write to stdout */
50 r = recv(fd, buf, sizeof(buf), 0);
52 fprintf(stderr, "read: %s\n", strerror(errno));
59 fwrite(buf, r, 1, stdout);