unix-socket

commit 0dcaf0fcbc48723839e9d6fd5cf06a0b57d284d7
Author: parazyd <parazyd@dyne.org>
Date:   Mon,  4 Jan 2021 23:35:56 +0100

Add example.

Diffstat:
A
Makefile
 | 
6
++++++
A
client.c
 | 
39
+++++++++++++++++++++++++++++++++++++++
A
server.c
 | 
51
+++++++++++++++++++++++++++++++++++++++++++++++++++

3 files changed, 96 insertions(+), 0 deletions(-)
diff --git a/Makefile b/Makefile
@@ -0,0 +1,6 @@
+all: clean
+	cc -o client client.c
+	cc -o server server.c
+
+clean:
+	rm -f client server
diff --git a/client.c b/client.c
@@ -0,0 +1,39 @@
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#define DATA "data from client"
+
+int main(int argc, char *argv[])
+{
+	int sock;
+	struct sockaddr_un server;
+	char buf[1024];
+
+	if (argc < 2) {
+		printf("usage: %s <pathname>\n", argv[0]);
+		exit(1);
+	}
+
+	sock = socket(AF_UNIX, SOCK_STREAM, 0);
+	if (sock < 0) {
+		perror("opening stream socket");
+		exit(1);
+	}
+
+	server.sun_family = AF_UNIX;
+	strcpy(server.sun_path, argv[1]);
+
+	if (connect(sock, (struct sockaddr *)&server, sizeof(struct sockaddr_un)) < 0) {
+		close(sock);
+		perror("connecting stream socket");
+		exit(1);
+	}
+
+	if (write(sock, DATA, sizeof(DATA)) < 0)
+		perror("writing on stream socket");
+	close(sock);
+}
diff --git a/server.c b/server.c
@@ -0,0 +1,50 @@
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#define NAME "socket"
+
+int main(void)
+{
+	int sock, msgsock, rval;
+	struct sockaddr_un server;
+	char buf[1024];
+
+	sock = socket(AF_UNIX, SOCK_STREAM, 0);
+	if (sock < 0) {
+		perror("opening stream socket");
+		exit(1);
+	}
+
+	server.sun_family = AF_UNIX;
+	strcpy(server.sun_path, NAME);
+	if (bind(sock, (struct sockaddr *)&server, sizeof(struct sockaddr_un))) {
+		perror("binding stream socket");
+		exit(1);
+	}
+
+	printf("Socket has name %s\n", server.sun_path);
+	listen(sock, 5);
+
+	for (;;) {
+		msgsock = accept(sock, 0, 0);
+		if (msgsock == -1) {
+			perror("accept");
+		} else do {
+			memset(buf, 0, sizeof(buf));
+			if ((rval = read(msgsock, buf, 1024)) < 0)
+				perror("reading stream message");
+			else if (rval == 0)
+				printf("Ending connection\n");
+			else
+				printf("-->%s\n", buf);
+		} while (rval > 0);
+		close(msgsock);
+	}
+
+	close(sock);
+	unlink(NAME);
+}+
\ No newline at end of file