implemented basic 'cd' in foolshell

1 files changed, 76 insertions, 14 deletions

diff --git a/userspace/foolshell.c b/userspace/foolshell.c
index 29e8438..faa46be 100644
--- a/userspace/foolshell.c
+++ b/userspace/foolshell.c
@@ -10,17 +10,20 @@ void hello()
     // ascci art: http://patorjk.com/software/taag/#p=testall&f=Cards&t=Fool%20OS
     puts(
                     
-        "       ______            __   ____  _____      \n"
-        "      / ____/___  ____  / /  / __ \\/ ___/     \n"
-        "     / /_  / __ \\/ __ \\/ /  / / / /\\__ \\   \n"
-        "    / __/ / /_/ / /_/ / /  / /_/ /___/ /       \n"
-        "   /_/    \\____/\\____/_/   \\____//____/     \n"
-        "                                               \n"
-        "Welcome to FoolShell v0.2 (Compiled on " __DATE__ " at " __TIME__ "\n"
-        "--------------------------------------------------------------------\n\n"
-        "type 'help' anytime to show shell built-ins\n"
-        "or execute user programms that are in the '/bin' directory (e.g. ls)\n"
+    "       ______            __   ____  _____      \n"
+    "      / ____/___  ____  / /  / __ \\/ ___/     \n"
+    "     / /_  / __ \\/ __ \\/ /  / / / /\\__ \\   \n"
+    "    / __/ / /_/ / /_/ / /  / /_/ /___/ /       \n"
+    "   /_/    \\____/\\____/_/   \\____//____/     \n"
+    "                                               \n"
+    "Welcome to FoolShell v0.3 (Compiled on " __DATE__ " at " __TIME__ "\n"
+    "------------------------------------------------------------------\n\n"
+    "Please type 'help' anytime, to show shell \"built-ins\" or execute \n"
+    "user programms that are in you $PATH directory by simply typing \n"
+    "their filenames.\n"
     );
+
+    printf("Your $PATH is currently set to: %s\n\n",getenv("PATH"));
 }
 
 void prompt() 
@@ -105,10 +108,68 @@ int process(char *buf)
 
     if(!strcmp(command,"help"))
     {
-	puts("foolshell: supported built-in commands: 'help', 'echo [string]', 'malloc [bytes]', 'free [address]', 'getenv [var]', 'putenv [var] [val]', 'env' 'cd [dir]'");
+	puts("foolshell: supported built-in commands: 'help', 'echo [string]', 'malloc [bytes]', 'free [address]', 'getenv [var]', 'putenv/setenv [var] [val]', 'env' 'cd [dir]'");
     }
     else if(!strcmp(command,"cd"))
     {
+	char *dir=getenv("PWD");
+
+	char buf[256];
+
+	if(token[1][0]!='/')
+	{
+	    sprintf(buf,"%s%s%s",dir,dir[0]=='/'&&dir[1]==0?"":"/",token[1]);
+	}
+	else
+	{
+	    sprintf(buf,"%s",token[1]);
+	}
+
+	char token[10];
+
+	//adjust pwd (resolve '..' and '.')
+////	printf("adjusting pwd: '%s'\n",buf);
+	int left=1;
+	int right=0;
+
+	do{
+
+	    int t=0;
+	    do
+	    {
+		right++;
+		token[t]=buf[right];
+
+		t++;
+	    }
+	    while(buf[right]!=0&&buf[right]!='/');
+	    token[t-1]=0;
+	    
+//	    printf("path token: '%s'\n",token);
+
+	    
+
+	    if(!strcmp(token,".."))
+	    {
+		left--;
+		while(buf[left]!='/')left--;
+	    }
+	    else if(!strcmp(token,"."))
+	    {
+	    }
+	    else
+	    {
+		int i=0;
+		if(left!=1)buf[left++]='/';
+		do{buf[left++]=token[i++];}while(token[i]!=0);
+
+	    }
+
+	}while(buf[right]!=0);
+	buf[left]=0;
+//	printf("adjusted: '%s'\n",buf);
+	
+	setenv("PWD",buf,1);
 
     }
     else if(!strcmp(command,"echo"))
@@ -128,14 +189,14 @@ int process(char *buf)
     }
     else if(!strcmp(command,"getenv"))
     {
-	printf("(0x%08X) put: %s = %s(0x%08X) \n",environ,token[1],getenv(token[1]),getenv(token[1]));
+	printf("(0x%08X) get: '%s' = '%s'(0x%08X) \n",environ,token[1],getenv(token[1]),getenv(token[1]));
     }
-    else if(!strcmp(command,"putenv"))
+    else if(!strcmp(command,"putenv")||!strcmp(command,"setenv"))
     {
 	char buf[256];
 	sprintf(buf,"%s=%s",token[1],token[2]);
 	putenv(buf);
-	printf("(0x%08X) set: %s = %s \n",environ,token[1],getenv(token[1]));
+	printf("(0x%08X) set: '%s' = '%s' \n",environ,token[1],getenv(token[1]));
     }
     else if(!strcmp(command,"env"))
     {
@@ -152,6 +213,7 @@ int process(char *buf)
 	execve(token[0],token,0);
 	char buf[256];
 	sprintf(buf,"/bin/%s",token[0]);
+	asm("mov $0x05bff,%esp"); // set stack pointer
 	execve(buf,token,environ);
 	puts("foolshell: command not found");
     }