"add a few constructs"

src/lexer/lexer.c

@@ -44,9 +44,6 @@ void msh_lexer_parse(msh_lexer *lexer, char *buf, SIZE_TYPE sz) {
 
   char *cur_word_buf = msh_callocate(1024, sizeof(char));
 
-  for (i = 0; i < sz; i++) {
-    int do_clear = 0;
-    switch (buf[i]) {
   /*case '#':
     do_clear = 1;
     break;
@@ -79,7 +76,25 @@ void msh_lexer_parse(msh_lexer *lexer, char *buf, SIZE_TYPE sz) {
     do_clear = 1;
     break;
     */
+
+  int quote_mode = 0;
+
+  for (i = 0; i < sz; i++) {
+    int do_clear = 0;
+    switch (buf[i]) {
+    case '#':
+      cur_word_buf[n++] = '\0';
+      msh_lexer_push_item(lexer, MSH_LEXER_ITEM_TYPE_WORD, cur_word_buf, n);
+      goto lexer_cancel;
+    case '"':
+    case '\'':
+      quote_mode = !quote_mode;
+      goto do_add;
     case ' ':
+      if (quote_mode == 1) {
+        goto do_add;
+        break;
+      }
     case '\n':
     case '\0':
       cur_word_buf[n++] = '\0';
@@ -87,6 +102,7 @@ void msh_lexer_parse(msh_lexer *lexer, char *buf, SIZE_TYPE sz) {
       do_clear = 1;
       break;
     default:
+    do_add:
       cur_word_buf[n++] = buf[i];
       break;
     }
@@ -97,6 +113,7 @@ void msh_lexer_parse(msh_lexer *lexer, char *buf, SIZE_TYPE sz) {
       n = 0;
     }
   }
+lexer_cancel:
   msh_deallocate(cur_word_buf);
 }
 
@@ -134,8 +151,12 @@ void msh_lexer_execute(msh_lexer *lexer) {
   }
   args[n++] = 0;
 
+  /* Do nothing on blank commands */
+  if (*cmd == '\0') {
+    exec_success = 1;
+  }
   /* Check if the command is a built-in */
-  if (msh_try_builtin(cmd, args)) {
+  else if (msh_try_builtin(cmd, args)) {
     exec_success = 1;
   }
   /* If the command is a folder, cd to it */

src/system/linux/linux.c

@@ -59,9 +59,6 @@ void msh_write(char *st, SIZE_TYPE size) { SYSCALL(write, 1, st, size); }
 int msh_execute(char *cmd, char **args) {
   SIZE_TYPE fork;
 
-  if (*cmd == '\0') {
-    return 0;
-  }
   fork = (SIZE_TYPE)SYSCALL(fork, 0);
 
   if (fork == 0) {