wip

Makefile

@@ -9,7 +9,7 @@ build: output_dir
 	gcc -Wall -std=gnu99 ${RELEASE_ARGS} ${SOURCES} ${LIBRARIES} ${OUTPUT:PROG=mash}
 
 debug: output_dir
-	gcc -Wall -std=gnu99 ${SOURCES} ${LIBRARIES} ${OUTPUT:PROG=mash}
+	gcc -Wall -std=gnu99 -g ${SOURCES} ${LIBRARIES} ${OUTPUT:PROG=mash}
 
 output_dir:
 	mkdir -p ${OUTPUT_DIR}

msh.c

@@ -1,5 +1,8 @@
+#define _GNU_SOURCE
+
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdbool.h>
 #include <unistd.h>
 #include <sys/wait.h>
 #include <string.h>
@@ -10,7 +13,10 @@
 #include "msh.h"
 
 #define clear() printf("\033[H\033[J")
-#define MATHLEN 10
+#define MATHLEN 100000
+
+static char *prompt = NULL;
+static bool skipMath = false;
 
 union pipe {
 	int fileDesc[2];
@@ -23,43 +29,86 @@ union pipe {
 static char *builtinFunctions[] = {
 	"exit",
 	"author",
-	"cd"
+	"cd",
+	"nomorenumbers"
 };
 
 int (*builtinFunc[]) (char **) = {
 	&builtinExit,
 	&builtinAuthor,
-	&builtinCD
+	&builtinCD,
+	&builtinNMN
 };
 
-int builtinExit() {
+int builtinExit(char **args) {
+	rl_clear_history();
+	free(args);
 	exit(EXIT_SUCCESS);
 }
 
-int builtinAuthor() {
+int builtinAuthor(char **args) {
 	static const char* message =
 		"Author: Spencer\n"
 		"Description: A shell to promote math!\n"
 		"Ask for the source code!\n"
 		"\n";
 	printf("%s", message);
+	free(args);
 	return 0;
 }
 
 int builtinCD(char **dir) {
 	int status = 0;
-	if (dir != NULL) {
-		if (chdir(dir[1]) != 0) {
+	char *oldPWD = getenv("PWD");
+	char *changeDir = malloc(sizeof(char *));
+	if (dir[1] != NULL) {
+		char c = *dir[1];
+		switch (c) {
+			case '~':
+				changeDir = realloc(changeDir, strlen(getenv("HOME") + strlen(dir[1])));
+				strcpy(changeDir, getenv("HOME"));
+				strcat(changeDir, dir[1]+1);
+				break;
+			case '-':
+				changeDir = realloc(changeDir, strlen(getenv("OLDPWD")));
+				strcpy(changeDir, getenv("OLDPWD"));
+				break;
+			default:
+				changeDir = dir[1];
+				break;
+		}
+		if (chdir(changeDir) != 0) {
 			status = 1;
 			printf("bash: cd: error\n");
+		} else {
+			setenv("PWD", dir[1], 1);
+			setenv("OLDPWD", oldPWD, 1);
+			free(prompt);
+			prompt = NULL;
 		}
 	} else {
-		status = 1;
-		printf("bash: cd: error\n");
+		if (chdir(getenv("HOME")) != 0) {
+			status = 1;
+			printf("Bash: cd: error\n");
+		} else {
+			setenv("PWD", getenv("HOME"), 1);
+			setenv("OLDPWD", oldPWD, 1);
+			free(prompt);
+			prompt = NULL;
+		}
 	}
+	free(changeDir);
+	changeDir = NULL;
+	free(dir);
 	return status;
 }
 
+int builtinNMN(char **args) {
+	skipMath = true;
+	free(args);
+	return 0;
+}
+
 void failedTest() {
 	static const char* message =
 		"\n"
@@ -91,18 +140,21 @@ int runCommand(char *command) {
 	return status;
 }
 
-char **splitCMD(char *line) {
+char **splitCMD(const char *line) {
         size_t size = 8;
         size_t pos = 0;
-        char **args = calloc(0, size * sizeof(char*));
+        char **args = malloc(size * sizeof(char*));
         char *arg = NULL;
 
+	char *lineTest = NULL;
+	lineTest = strdup(line);
+
         if(line == NULL) {
                 *args=NULL;
                 return args;
         }
 
-        arg = strtok(line, " \t\r\n\a");
+        arg = strtok(lineTest, " \t\r\n\a");
         while (arg != NULL) {
                 args[pos] = arg;
                 pos++;
@@ -126,6 +178,7 @@ int execCommand(char *command) {
 			return (*builtinFunc[i])(commandARGS);
 		}
 	}
+	free(commandARGS);
 	return runCommand(command);
 }
 
@@ -165,7 +218,6 @@ char *getPrompt() {
 	size_t len = 0;
 	int status = 0;
 
-	static char *prompt = NULL;
 	static size_t promptCap = 0;
 
 	pipe(input.fileDesc);
@@ -224,17 +276,51 @@ int randomNum(int limit) {
 
 int mathTest() {
 	int status = 0;
-	int numAnswer = 0;
+	long numAnswer = 0;
 	int num1 = randomNum(MATHLEN);
 	int num2 = randomNum(MATHLEN);
+	long numSolution = 0;
 	char *numLine = NULL;
-	printf("%d + %d = ", num1, num2);
-	numLine = readline("");
-	sscanf(numLine, "%d", &numAnswer);
+
+	const char mathOperation[] = {'+', '-', '*', '/'};
+
+	int randProblem = randomNum(3);
+
+	if (skipMath) {
+		return 0;
+	}
+
+	for(int i = 0; i < 1; i++) {
+		switch (mathOperation[randProblem]) {
+			case '+':
+				numSolution = num1 + num2;
+				break;
+			case '-':
+				numSolution = num1 - num2;
+				break;
+			case '*':
+				numSolution = num1 * num2;
+				break;
+			case '/':
+				numSolution = num1 / num2;
+				break;
+
+		}
+		#ifndef RELEASEBUILD
+		printf("Answer: %ld\n", numSolution);
+		#endif
+		printf("%d %c %d = ", num1, mathOperation[randProblem], num2);
+		numLine = readline("");
+		sscanf(numLine, "%ld", &numAnswer);
+
+		if (numSolution != numAnswer) { // If wrong answer
+			status = 1;
+		}
+	}
 
 	#ifdef RELEASEBUILD
 	printf("Calculating");
-	for (int i = 0; i < 3; i++){
+	for (int i = 0; i < 5; i++){
 		printf(".");
 		fflush(stdout);
 		sleep(2);
@@ -242,10 +328,6 @@ int mathTest() {
 	printf("\n");
 	#endif
 
-	if ((num1 + num2) != numAnswer) { // If wrong answer
-		status = 1;
-	}
-
 	free(numLine);
 	return status;
 }
@@ -267,6 +349,8 @@ void startShell() {
 		}
 		free(line);
 	}
+	free(prompt);
+	prompt = NULL;
 }
 
 void handleBreak(){
@@ -281,5 +365,6 @@ int main() {
 	initShell();
 	signal(SIGINT, handleBreak);
 	startShell();
+	rl_clear_history();
 	exit(EXIT_SUCCESS);
 }

msh.h

@@ -1,3 +1,4 @@
-int builtinExit();
-int builtinAuthor();
+int builtinExit(char **args);
+int builtinAuthor(char **args);
 int builtinCD(char **dir);
+int builtinNMN(char **args);