int main(int argc, char **argv)
{
int n;
int fd;
int i;
char **vect;
char buffer[BUFF_SIZE];
char *san;
while(1)
{
my_str("[--MyMiniShell--]$ ");
if((n = read(1, buffer, BUFF_SIZE-1)) < 0)
{
my_str("Something bad happened.\n");
exit(0);
}
else
{
san = my_stripbuffer(buffer);
vect = my_str2vect(san);
if(my_strcmp(vect[0], "cd") == 0)
{
if((n = chdir(vect[1])) < 0)
{
my_str("Execution of cd failed.\n");
}
}
else if(my_strcmp(vect[0], "exit") == 0)
{
my_str("Goodbye!\n");
exit(0);
}
else
{
if((fd = fork()) < 0)
{
my_str("Fork Fail");
exit(0);
}
if(fd > 0)
{
wait();
}
else
{
if((n = execvp(vect[0], vect)) < 0)
{
my_str("Execution of ");
my_str(vect[0]);
my_str(" failed.\n");
exit(0);
}
}
}
}
}
}
/*pre: takes in int argc and char **argv
*post: runs the minishell program
* with argc number of command line arguments defined by argv
*/
int main(int argc, char **argv)
{
int n;
int pid;
char *s;
char **v;
s = (char*)xmalloc(256*sizeof(char));
while(1)
{
my_str("minishell> ");
n = read(0, s, 256);
#ifdef DEBUG
my_str("n= ");
my_int(n);
my_char('\n');
#endif
s[n - 1] = '\0';
if(n > 1)/*1 character is just a \0 (read in \n user just hit enter)*/
{
v = my_str2vect(s);
if(my_strcmp(v[0], "cd") == 0)
my_chdir(v[1]);
else if(my_strcmp(v[0], "exit") == 0)
break;
else if(v[0] != NULL)/*if not just whitespace, we're going to need to fork*/
{
#ifdef DEBUG
my_str("command:>");
my_str(v[0]);
my_str("<\n");
my_str("going to fork\n");
#endif
if((pid = fork()) < 0)
my_err("minishell: ERROR forking process!\n");
else if(pid > 0)
wait(NULL);
else
{
my_execvp(v[0], v);
#ifdef DEBUG
my_str("exiting forked process\n");
#endif
exit(0);/*for processes that end in error*/
}
}
#ifdef DEBUG
my_str("freeing vector\n");
#endif
my_freevect(v);
}
else if(n < 0)
my_str("minishell: ERROR reading command\n");
}
free(s);
my_str("Thank you for using myminishell, live long and prosper.\n");
return 0;
}
void testMY_STR2VECT(void){
char* str = NULL;
char** strVect = NULL;
int i;
if(temp_file != NULL){
str = my_strdup("testing was successful");
strVect = my_str2vect(str);
CU_ASSERT_STRING_EQUAL(strVect[0], "testing");
CU_ASSERT_STRING_EQUAL(strVect[1], "was");
CU_ASSERT_STRING_EQUAL(strVect[2], "successful");
CU_ASSERT(strVect[3] == NULL);
for(i = 0; strVect[i]; ++i){
free(strVect[i]);
strVect[i] = NULL;
}
free(strVect);
strVect = NULL;
strVect = my_str2vect(NULL);
CU_ASSERT(strVect == NULL);
free(str);
}
}
int main(int argc, char **argv)
{
test_my_char();
test_my_str();
test_my_int();
test_my_alpha();
test_my_digits();
test_my_strindex();
test_my_strlen();
test_my_revstr();
my_num_base(123, "01");
my_char('\n');
my_num_base(123, "0123456789ABCDEF");
my_char('\n');
my_num_base(100, "0123456789");
my_char('\n');
test_my_strrindex();
my_str("-->");
my_str(my_vect2str(&argv[1]));
my_str("<--\n");
my_str("-->");
my_printvect(&argv[1]);
my_str("<--\n");
my_printvect(my_str2vect(my_strdup("hello world bro")));
my_char('\n');
my_int(my_atoi("100"));
my_char('\n');
my_int(my_atoi("-100"));
my_char('\n');
my_int(my_atoi(""));
my_char('\n');
my_int(my_atoi("\n\n\n"));
my_char('\n');
return 0;
}
/*
* server.c
*
* The server portion of the server.
* Run with: './server portNum'. The ideal port range is between
* 50000 and 52000, as to not hit any reserved ports.
*
* Once the server is running, you can press Ctrl + C to disconnect all
* clients and stop the server.
*
* Precondition: A port number is specified, and the port is available
* Postcondition: The server is running
*
* @param argc - The number of command line arguments
* @param argv - The vector of command line arguments
*/
int main(int argc, char** argv)
{
int port;
int pid;
int clientfd;
int sockfd;
int clilen;
int bytes_read;
struct sockaddr_in serv_addr;
struct sockaddr_in cli_addr;
char buffer[BUFFER_SIZE];
char** input;
signal(SIGINT, bye);
if(argc != 2)
{
my_str("Usage: ./server portNum\n");
exit(1);
}
if((port = my_atoi(argv[1])) <= 0 || port > 65535)
{
my_str("Invalid port number!\n");
exit(1);
}
sockfd = socket(AF_INET, SOCK_STREAM, 0);
serv_addr.sin_port = htons(port);
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = INADDR_ANY;
memset(&serv_addr.sin_zero, 0, 8);
if(bind(sockfd, (struct sockaddr*) &serv_addr, sizeof(serv_addr)) < 0)
{
my_str("Unable to bind socket!\n");
exit(1);
}
listen(sockfd, 5);
clilen = sizeof(cli_addr);
while(1)
{
if((clientfd = accept(sockfd, (struct sockaddr*) &cli_addr, &clilen)) < 0)
{
my_str("Unable to accept client\n");
exit(1);
}
if((pid = fork()) < 0)
{
my_str("fork() critical error!\n");
exit(1);
}
if(pid == 0)
{
signal(SIGINT, serv_kill);
gl_env.sockfd = clientfd;
bytes_read = read(clientfd, buffer, BUFFER_SIZE - 1);
buffer[bytes_read] = '\0';
gl_env.username = my_strdup(my_str2vect(buffer)[0]);
my_str("***");
my_str(gl_env.username);
my_str(" connected!\n");
while(1)
{
write(clientfd, ".", 1);
if((bytes_read = read(clientfd, buffer, BUFFER_SIZE - 1)) < 0)
{
my_str("Read failed!\n");
exit(1);
}
input = my_str2vect(buffer);
if(my_strcmp(input[0], "/exit") == 0)
{
my_str("***");
my_str(gl_env.username);
my_str(" disconnected\n");
close(clientfd);
free(gl_env.username);
my_freevect(input);
exit(1);
}
else if(my_strcmp("/nick", input[0]) == 0)
{
if(input[1])
{
bytes_read = 1;
if(my_strcmp(input[1], "") == 0 || my_strcmp(input[1], "\t") == 0)
{
for( ; my_strcmp(input[bytes_read], "") == 0 || my_strcmp(input[bytes_read], "\t") == 0; bytes_read++)
;
}
my_str("***");
my_str(gl_env.username);
my_str(" changed username to ");
free(gl_env.username);
gl_env.username = my_strdup(input[bytes_read]);
my_str(gl_env.username);
my_char('\n');
}
}
else if(my_strcmp("/me", input[0]) == 0)
{
my_str("***");
my_str(gl_env.username);
if(input[1])
{
my_str(" ");
bytes_read = 1;
for( ; input[bytes_read]; bytes_read++)
{
if(!my_strcmp(input[bytes_read], "") == 0 && !my_strcmp(input[bytes_read], "\t") == 0)
{
my_str(input[bytes_read]);
my_str(" ");
}
}
}
my_char('\n');
}
else if(my_strcmp(buffer, "") != 0)
{
my_str(gl_env.username);
my_str(": ");
my_str(buffer);
my_char('\n');
}
my_freevect(input);
}
}
}
return 0;
}
int main(int argc, char** argv){
struct addrinfo *ailist = NULL;
struct addrinfo *currai = NULL;
struct addrinfo hint;
extern int servfd;
int clientfd;
int err;
extern pid_t pid;
char* username = NULL;
char* input = NULL;
char** inputVect = NULL;
int strLen;
if(argc != 2){
my_str("usage: ./myirc <port>\n");
exit(1);
}
signal(SIGINT, sig_bye);
signal(SIGQUIT, sig_bye);
input = xmalloc(BUF_LEN_MAX);
hint.ai_flags = AI_PASSIVE;
hint.ai_family = AF_INET;
hint.ai_socktype = SOCK_STREAM;
hint.ai_protocol = 0;
hint.ai_addrlen = 0;
hint.ai_canonname = NULL;
hint.ai_addr = NULL;
if((err = getaddrinfo(NULL, argv[1], &hint, &ailist)) != 0){
my_str((char*)gai_strerror(err));
exit(1);
}
for(currai = ailist; currai != NULL; currai = currai->ai_next){
if((servfd = socket(currai->ai_addr->sa_family, currai->ai_socktype, 0)) >= 0){
if(bind(servfd, currai->ai_addr, currai->ai_addrlen) >= 0){
if(listen(servfd, QUEUELENGTH) >= 0){
while(1){
#ifdef DEBUG
my_str("Waiting for client.\n");
#endif
clientfd = accept(servfd, NULL, NULL);
if((pid = fork()) < 0)
my_err("Fork error");
if(pid == 0){
#ifdef DEBUG
my_str("Client connected.\n");
#endif
while((strLen = recv(clientfd, input, BUF_LEN_MAX, 0)) <= 0)
;
my_str(input);
input[strLen] = '\0';
inputVect = my_str2vect(input);
username = my_strdup(inputVect[0]);
my_freevect(inputVect);
my_str(" has connected.\n");
}
for(;pid == 0;){
strLen = recv(clientfd, input, BUF_LEN_MAX, 0);
if(strLen >= 0){
#ifdef DEBUG
my_str("Client input read.\n");
#endif
input[strLen] = '\0';
inputVect = my_str2vect(input);
if(!my_strcmp(inputVect[0], "/exit")){
close(clientfd);
my_str(username);
my_str(" has disconnected.\n");
exit(0);
} else if (!my_strcmp(inputVect[0], "/me")){
my_str(username);
my_char(' ');
my_str(my_vect2str(&(inputVect[1])));
} else if (!my_strcmp(inputVect[0], "/nick")){
if(inputVect[1]){
my_str(username);
my_str(" changed name to: ");
free(username);
username = my_strdup(inputVect[1]);
my_str(username);
}
} else {
my_str(username);
my_str(": ");
my_str(input);
}
my_char('\n');
}
}
}
exit(0);
}
close(servfd);
my_err("Listen error");
}
close(servfd);
my_err("Bind error");
}
close(servfd);
my_err("Socket error");
}
#ifdef DEBUG
my_str("EXITING AT END.\n");
#endif
exit(1);
}
int main(int argc, char *argv[])
{
int listener, newsockfd, portno, i, j, bytesRead;
fd_set master, readfd;
struct s_node *userList = NULL;
struct user *newUser = NULL;
socklen_t clilen;
char buffer[256];
char *messageSending;
struct sockaddr_in serv_addr, cli_addr;
int n, maxFileDescriptors = 0;
char **parsedInput;
if (argc < 2)
{
my_str("Usage: /server [port]\n");
exit(1);
}
listener = socket(AF_INET, SOCK_STREAM, 0);
if (listener < 0)
{
my_str("ERROR opening socket");
exit(1);
}
my_bzero((char *) &serv_addr, sizeof(serv_addr));
portno = my_atoi(argv[1]);
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = INADDR_ANY;
serv_addr.sin_port = htons(portno);
my_memset(&(serv_addr.sin_zero), '\0', 8);
if (bind(listener, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0)
{
my_str("Binding failed.\n");
exit(1);
}
listen(listener,5);
FD_ZERO(&master);
FD_ZERO(&readfd);
FD_SET(listener, &master);
maxFileDescriptors = listener;
my_str("Server is now online!\n\n");
while(1)
{
readfd = master;
if (select(maxFileDescriptors + 1, &readfd, NULL, NULL, NULL) < 0)
error("select() failed!\n");
for(i = 3; i <= maxFileDescriptors; i++)
{
if(FD_ISSET(i, &readfd))
{
if(i == listener) /* we got a new connection */
{
my_str("Got a new connection!\n");
clilen = sizeof(cli_addr);
newsockfd = accept(listener,
(struct sockaddr *) &cli_addr,
&clilen);
if (newsockfd < 0)
error("ERROR on accept");
/* read in username */
my_bzero(buffer, 256);
bytesRead = read(newsockfd, buffer, 255);
if (bytesRead > 0) /* was valid username */
{
newUser = (struct user *)malloc(sizeof(struct user));
newUser->fd = newsockfd;
newUser->nick = my_strconcat(buffer, ""); /* hacky lmao */
add_node(new_node(newUser, NULL, NULL), &userList);
my_str("New user entry: ");
my_str(buffer);
my_char('\n');
messageSending = my_strconcat(buffer, " has connected.");
for(j = 3; j <= maxFileDescriptors; j++)
{
if(FD_ISSET(j, &master))
{
if(j != listener && j != i)
{
if (write(j, messageSending, my_strlen(messageSending)) < 0)
error("write() error!\n");
}
}
}
}
else
my_str("no nickname received...\n");
FD_SET(newsockfd, &master);
if (newsockfd > maxFileDescriptors)
maxFileDescriptors = newsockfd;
}
else /* we got text */
{
bytesRead = read(i, buffer, 255);
messageSending = "";
if (bytesRead > 1) /* got a message, not just a newline */
{
buffer[bytesRead] = '\0';
if (buffer[0] == '/') /* special command */
{
parsedInput = my_str2vect(buffer);
if (my_strcmp(parsedInput[0], "/nick") == 0)
{
if (parsedInput[1] != NULL)
{
messageSending = my_strconcat(getUserNick(userList, i), " changed their nick to ");
removeUser(&userList, i);
newUser = (struct user *)malloc(sizeof(struct user));
newUser->fd = i;
newUser->nick = parsedInput[1];
add_node(new_node(newUser, NULL, NULL), &userList);
messageSending = my_strconcat(messageSending, getUserNick(userList, i));
}
}
else if (my_strcmp(parsedInput[0], "/me") == 0)
{
messageSending = my_strconcat(getUserNick(userList, i), " ");
messageSending = my_strconcat(messageSending, my_vect2str(&parsedInput[1]));
}else if (my_strcmp(parsedInput[0], "/exit") == 0)
{
messageSending = "";
}else /* invalid command */
{
if (write(i, "Invalid command.", my_strlen("Invalid command.")) < 0)
error("wrote() error!\n");
}
}
else /* normal message */
{
messageSending = my_strconcat(getUserNick(userList, i), ": ");
messageSending = my_strconcat(messageSending, buffer);
}
if (my_strcmp(messageSending, "") != 0) /* if wrote message to send, send it */
{
my_str(messageSending);
my_char('\n');
for(j = 3; j <= maxFileDescriptors; j++)
{
if(FD_ISSET(j, &master))
{
if(j != listener && j != i)
{
if (write(j, messageSending, my_strlen(messageSending)) < 0)
error("write() error!\n");
}
}
}
}
}
else if (bytesRead == 0) /* we closed the file descriptor on client */
{
messageSending = my_strconcat("SERVER: ", getUserNick(userList, i));
messageSending = my_strconcat(messageSending, " disconnected.\n");
my_str(messageSending);
removeUser(&userList, i);
for(j = 3; j <= maxFileDescriptors; j++)
{
if(FD_ISSET(j, &master))
{
if(j != listener && j != i)
{
/* change to "SERVER: /nick disconnected" */
if (write(j, messageSending, my_strlen(messageSending)) < 0)
error("write() error!\n");
}
}
}
close(i);
FD_CLR(i, &master);
continue;
}
else if (bytesRead < 0)
error("Read error...\n");
}
}
}
}
return 0;
}
