foolshell and syscalls improvememets

1 files changed, 151 insertions, 0 deletions

diff --git a/userspace/foolshell.c b/userspace/foolshell.c
new file mode 100644
index 0000000..819c5d6
--- /dev/null
+++ b/userspace/foolshell.c
@@ -0,0 +1,151 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+
+//
+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"
+    );
+}
+
+void prompt() 
+{
+    printf(
+        "$ "
+    );
+}
+
+int main(int argc, char **argv) 
+{
+
+    bool silent=false;
+    for(int i=0;i<argc;i++)
+    {
+	if(!strcmp(argv[i],"--silent"))silent=true;
+    }
+    
+    if(!silent)hello();
+
+    char *buf=malloc(256);
+
+    while(1)
+    {
+	prompt();
+        fgets(buf,255,stdin);
+	buf[strlen(buf)-1]=0; // remove \n
+	process(buf);
+    }
+
+    return 0;
+}
+
+char **tokenize(char *buf)
+{
+
+    char **token;
+    token=malloc(10*sizeof(char*));
+
+    int l=strlen(buf);
+
+    int i;
+    int c=0;
+
+    for(i=0;i<l;i++)
+    {  
+	// init space for next token
+	token[c]=malloc(256);
+
+	//skip all the whitespace
+	while(buf[i]==' '&&i<l)i++;
+	if(i==l)break;
+
+	//get token
+	int t=0;
+
+	while(buf[i]!=' '&&i<l)
+	{
+	    token[c][t]=buf[i];
+	    t++;
+	    i++;
+	}
+	token[c][t]=0;
+	
+
+
+//	printf("token %i : <%s>\n",c, token[c]);
+	c++;
+	token[c]=NULL;
+
+    }
+
+    return token;
+
+}
+
+int process(char *buf)
+{
+    
+    char **token=tokenize(buf);
+    char *command=token[0];
+  //  puts(command);
+    // copied from trottelshell
+
+    if(!strcmp(command,"help"))
+    {
+	puts("foolshell: supported built-in commands: 'help', 'echo [string]', 'malloc [bytes]', 'free [address]', 'getenv [var]', 'putenv [var] [val]'");
+    }
+    else if(!strcmp(command,"echo"))
+    {
+	printf("\"%s\"\n",token[1]);
+
+    }
+    else if(!strcmp(command,"malloc"))
+    {
+	uint8_t *mall=malloc(atoi(token[1]));
+	printf("allocated %d bytes at 0x%08X (%i).\n",atoi(token[1]),mall,mall);
+    }
+    else if(!strcmp(command,"free"))
+    {
+	free(atoi(token[1]));
+	printf("called free(0x%08X).\n",atoi(token[1]));
+    }
+    else if(!strcmp(command,"getenv"))
+    {
+	printf("%s = %s \n",token[1],getenv(token[1]));
+    }
+    else if(!strcmp(command,"putenv"))
+    {
+	char buf[256];
+	sprintf(buf,"%s=%s",token[1],token[2]);
+	putenv(buf);
+	printf("set: %s = %s \n",token[1],getenv(token[1]));
+    }
+    else
+    {
+	execve(token[0],token,0);
+	char buf[256];
+	sprintf(buf,"/bin/%s",token[0]);
+	execve(buf,token,0);
+	puts("foolshell: command not found");
+    }
+
+}
+
+
+
+
+