Large commit: Added reset function for CommandStruct, added reading from ~/.pishrc, and fixed running command in fork

Makefile

@@ -4,6 +4,7 @@ all: compile link
 
 compile:
 	gcc $(INC) -c -o build/main.o src/main.c
+	gcc $(INC) -c -o build/Common.o src/Common.c
 	gcc $(INC) -c -o build/Integrated.o src/Integrated.c
 	gcc $(INC) -c -o build/Pish.o src/Pish.c
 
@@ -13,17 +14,17 @@ link:
 exec: compile link
 	./bin/pish.out
 
-debug: debugCompile debugLink
+debug: clean debugCompile debugLink
 
 debugCompile:
 	gcc $(INC) -g -c -o build/main.o src/main.c
 	gcc $(INC) -g -c -o build/Integrated.o src/Integrated.c
+	gcc $(INC) -g -c -o build/Common.o src/Common.c
 	gcc $(INC) -g -c -o build/Pish.o src/Pish.c
 
 debugLink:
 	gcc -g -o bin/pish.out build/*.o
 
-
 clean:
 	rm build/*.o
 	rm bin/*.out

include/Common.h

@@ -6,4 +6,6 @@ typedef struct CommandStruct {
     int argc;
 } CommandStruct;
 
+void ResetCommandStruct(CommandStruct* command);
+
 #endif

include/Integrated.h

@@ -4,5 +4,6 @@
 #include "Common.h"
 
 void IntegratedCheck(char* command);
+void ReadPishrc(void);
 
 #endif

include/Pish.h

@@ -4,7 +4,6 @@
 #include "Common.h"
 
 void Pish(void);
-void Execute(char* command);
 void GetInput(char* inputString);
 void ParseInput(char* inputString, CommandStruct* command);
 

src/Common.c

@@ -0,0 +1,11 @@
+#include "Common.h"
+#include <string.h>
+#include <stdio.h>
+
+void ResetCommandStruct(CommandStruct* command)
+{
+    for (int i = 0; i < command->argc; i++)
+        memset(command->argv[i], 0, sizeof(command->argv[i]));
+    command->argc = 0;
+    return;
+}

src/Integrated.c

@@ -1,4 +1,12 @@
+#include <assert.h>
+#include <fcntl.h>
+#include <pwd.h>
 #include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/types.h>
 #include "Integrated.h"
 
 // Checks for commands that are built into Pish
@@ -11,4 +19,27 @@ void IntegratedCheck(char* command)
     if (command[0] == 'c' && command[1] == 'd')
         ;
     return;
+}
+
+// Reads ~/.pishrc and runs each command in the file
+void ReadPishrc(void)
+{
+    char* homeDir = (getpwuid(getuid()))->pw_dir;
+    strcat(homeDir, "/.pishrc");
+    int fd = open(homeDir, O_RDONLY | O_CREAT);
+    char commandString[1000] = "";
+    char buffer;
+    assert(fd > -1);
+    while (read(fd, &buffer, 1) > 0)
+    {
+        strcat(commandString, &buffer);
+        if (buffer == '\n')
+        {
+            // TODO: Make each command run
+            printf("%s\n", commandString);
+            memset(commandString, 0, sizeof(commandString));
+            continue;
+        }
+    }
+    assert(close(fd) >= 0);
 }

src/Pish.c

@@ -13,8 +13,10 @@ void Pish(void)
     CommandStruct* command = &commandObject;
     char inputString[1000]; // Max 1000 characters
     int forkPID;
+    ReadPishrc();
     while (1)
     {
+        ResetCommandStruct(command);
         GetInput(inputString);
         ParseInput(inputString, command);
 	    IntegratedCheck(command->argv[0]);
@@ -25,34 +27,23 @@ void Pish(void)
             // This is the child process
             // Setup the child's process environment here
             // E.g., where is standard I/O, how to handle signals?
-            // TODO: Adjust Execute() to handle CommandStruct
-            Execute(inputString);
+            // execve() is recommended, execvpe() may be better
+            execvp(command->argv[0], command->argv);
             // exec does not return if it succeeds
             printf("ERROR: Could not execute %s\n", inputString);
             exit(1);
         }
         // Parent
-        else
-        {
-            // This is the parent process; Wait for the child to finish
-            // Removed due to potentially useless
-            // int pid = forkPID;
-            // wait(&pid);
-            wait(&forkPID);
-        }
+        // This is the parent process; Wait for the child to finish
+        // Removed due to potentially useless
+        // int pid = forkPID;
+        // wait(&pid);
+        wait(&forkPID);
         // TODO: Remove break when while loop doesn't break program
         break;
     }
 }
 
-// Executes a command to the system
-void Execute(char* command)
-{
-    printf("%s\n", command);
-    system(command);
-    exit(0);
-}
-
 // Prints a prompt and then reads a command from the terminal
 void GetInput(char* inputString)
 {
@@ -62,6 +53,7 @@ void GetInput(char* inputString)
     return;
 }
 
+// Splits a string separated by spaces into an array of strings
 void ParseInput(char* inputString, CommandStruct* command)
 {
     //Parse command