Diff: SimpleShell.cpp

Revision:

0:49820d5a38c9

Child:

1:998a7ed04f10

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SimpleShell.cpp	Sat Dec 01 23:18:03 2018 +0000
@@ -0,0 +1,60 @@
+#include "SimpleShell.h"
+
+SimpleShell::SimpleShell()
+{
+}
+
+void SimpleShell::run()
+{
+    bool done=false;
+    strcpy(_cwd, "/log");
+
+    printf("Type help for assistance.\n");
+    while (!done) {
+        printPrompt();
+        readCommand();
+        //this.doCommand(cmdline);
+    }
+    puts("exiting shell\n");
+
+    return;
+}
+
+
+void SimpleShell::printPrompt()
+{
+    fputc('(', stdout);
+    fputs(_cwd, stdout);
+    fputs(")# ", stdout);
+}
+
+
+void SimpleShell::readCommand()
+{
+    int i=0;
+    char c;
+    bool done = false;
+    
+    memset(cmd, 0, MAXBUF);
+    do {
+        cmd[i] = 0;
+        c = fgetc(stdin);
+        if (c == '\r') { // if return is hit, we're done, don't add \r to cmd
+            done = true;
+        } else if (i < MAXBUF-1) {
+            if (c == 0x7f || c == '\b') { // backspace or delete
+                if (i > 0) { // if we're at the beginning, do nothing
+                    i--;
+                    fputs("\b \b", stdout);
+
+                }
+            } else {
+                fputc(c, stdout);
+                cmd[i++] = c;
+            }
+        }
+    } while (!done);
+    fputc('\n', stdout);
+
+
+}
\ No newline at end of file