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Author: javascript-2020

blog/25-12-03/unix-sockets/ex/ipc-client-linux.c

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+
+
+//  ipc-client-linux.c
+
+        
+        #include <sys/socket.h>
+        #include <sys/un.h>
+        #include <stdio.h>
+        #include <unistd.h>
+        #include <string.h>
+
+        
+        int main() {
+          
+              int sock    = socket(AF_UNIX, SOCK_STREAM, 0);
+              if(sock<0){
+                    perror("socket");
+                    return 1;
+              }
+          
+              struct sockaddr_un addr;
+              memset(&addr,0,sizeof(addr));
+              addr.sun_family   = AF_UNIX;
+              strcpy(addr.sun_path,"/tmp/mysock");
+          
+              if(connect(sock,(struct sockaddr*)&addr,sizeof(addr))<0){
+                    perror("connect");
+                    close(sock);
+                    return 1;
+              }
+          
+                                                                                //  Read message from server
+              char buf[256];
+              int n   = read(sock,buf,sizeof(buf)-1);
+              if(n>0){
+                    buf[n]    = '\0';
+                    printf("Client received: %s\n",buf);
+              }
+          
+                                                                                //  Send reply to server
+              const char *reply   = "Hello back from client!";
+              write(sock,reply,strlen(reply));
+          
+              close(sock);
+              return 0;
+            
+        }//main
+
+