Start command validation

util.c

@@ -1,4 +1,6 @@
 #include <time.h>
+#include <string.h>
+#include <ctype.h>
 
 void get_time(char *thetime)
 {
@@ -11,3 +13,22 @@ void get_time(char *thetime)
     strftime(thetime, 80, "%H:%M", timeinfo);
 }
 
+char *trim(char *str)
+{
+    char *end;
+
+    while (isspace(*str)) 
+        str++;
+
+    if (*str == 0)
+      return str;
+
+    end = str + strlen(str) - 1;
+    while (end > str && isspace(*end)) 
+        end--;
+
+    *(end+1) = 0;
+
+    return str;
+}
+