fork(2) download 
  1. /*minitalk サーバプログラム*/
  2. #include <stdio.h>
  3. #include <sys/types.h>
  4. #include <sys/socket.h>
  5. #include <netdb.h>
  6. #include <netinet/in.h>
  7.  
  8.  
  9. int CanIRecv(int fd){ 
  10. 	fd_set fdset;
  11. 	struct timeval timeout;
  12. 	FD_ZERO( &fdset ); 
  13. 	FD_SET( fd , &fdset );
  14. 	timeout.tv_sec = 0; 
  15. 	timeout.tv_usec = 0;
  16. 	return select( fd+1 , &fdset , NULL , NULL , &timeout );
  17. }
  18.  
  19.  
  20. int main(int argc, char *argv[])
  21. {
  22. 	int srv_sock, sock, port;
  23. 	struct sockaddr_in srv_addr, cli_addr;
  24. 	int addrlen, sendlen, recvlen;
  25. 	char buf[256];
  26.  
  27. 	/* ポート番号を引数から取得 */
  28. 	port = strtol(argv[1], NULL, 10);
  29.  
  30. 	/* ソケットの作成 */
  31. 	srv_sock = socket(AF_INET, SOCK_STREAM, 0);
  32. 	if (srv_sock < 0) {
  33. 		perror("cannot create socket");
  34. 		exit(-1);
  35. 	}
  36.  
  37. 	/* サーバとしてバインド */
  38. 	srv_addr.sin_family = AF_INET;
  39. 	srv_addr.sin_port = htons(port);
  40. 	srv_addr.sin_addr.s_addr = INADDR_ANY;
  41. 	if (bind(srv_sock, (struct sockaddr*)&srv_addr, sizeof(srv_addr)) < 0) {
  42. 		perror("bind failed");
  43. 		exit(-1);
  44. 	}
  45.  
  46. 	/* 待ち受け人数を1人に設定 */
  47. 	listen(srv_sock, 1);
  48.  
  49. 	/* クライアントからの接続を受け付ける */
  50. 	addrlen = sizeof(cli_addr);
  51. 	sock = accept(srv_sock, (struct sockaddr*)&cli_addr, &addrlen);
  52. 	if (sock == -1) {
  53. 		perror("accept failed");
  54. 		exit(-1);
  55. 	}
  56. 	printf("connected\n");
  57.  
  58. 	/* これ以上クライアントを受け付けないので、サーバのソケットを閉じる */
  59. 	close(srv_sock);
  60.  
  61. 	/* 実際の通信 */
  62. 	while (feof(stdin) == 0) {
  63.  
  64. 		if(CanIRecv(0)){
  65. 			/* 標準入力からキーボード入力された文字を読み込む */
  66. 			printf("message : ");
  67. 			fgets(buf, sizeof(buf), stdin);
  68. 			/* 読み込んだ文字をソケットに書き込む */
  69. 			sendlen = write(sock, buf, strlen(buf) + 1);
  70. 			if (sendlen < 0) {
  71. 				perror("cannot send a message");
  72. 			}
  73. 		}
  74.  
  75.  
  76. 		if (CanIRecv(sock)) {
  77. 			/* ソケットからのデータを読み込む */
  78. 			recvlen = read(sock, buf, sizeof(buf));
  79. 			if (recvlen <= 0) {
  80. 				/* クライアント側が EOF */
  81. 				break;
  82. 			}
  83. 			printf(">> %s", buf);
  84. 		}
  85.  
  86.  
  87. 	}
  88. 	close(sock);
  89. }
  90.  
  91.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Standard input is empty
compilation info 
prog.cpp: In function ‘int main(int, char**)’:
prog.cpp:28: error: ‘strtol’ was not declared in this scope
prog.cpp:34: error: ‘exit’ was not declared in this scope
prog.cpp:43: error: ‘exit’ was not declared in this scope
prog.cpp:51: error: invalid conversion from ‘int*’ to ‘socklen_t*’
prog.cpp:51: error:   initializing argument 3 of ‘int accept(int, sockaddr*, socklen_t*)’
prog.cpp:54: error: ‘exit’ was not declared in this scope
prog.cpp:59: error: ‘close’ was not declared in this scope
prog.cpp:69: error: ‘strlen’ was not declared in this scope
prog.cpp:69: error: ‘write’ was not declared in this scope
prog.cpp:78: error: ‘read’ was not declared in this scope
prog.cpp:67: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result
stdout 
Standard output is empty
https://ideone.com/mW7wE
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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