fix infinite loop on command not found

src/lexer/lexer.c

@@ -13,7 +13,7 @@ msh_lexer msh_lexer_new() {
 
   l.item_list_cur = l.item_list_head;
 
-  l.path = msh_env_get_path();
+  l.path = msh_env_get_path(&l.path_count);
 
   return l;
 };
@@ -148,7 +148,7 @@ static int do_exec(msh_lexer *lexer, char *cmd, char **args, int *n,
     /* loop through all the path entries and check if the file exists in them.
      */
     i = 0, *n = 0, j = 0;
-    while (1) {
+    while (j >= lexer->path_count) {
       full_path[*n] = lexer->path[j];
       *n += 1;
       if (lexer->path[j] == '\0') {

src/lexer/lexer.h

@@ -29,6 +29,7 @@ typedef struct msh_lexer_t {
   msh_lexer_item_list *item_list_head;
   msh_lexer_item_list *item_list_cur;
   char *path;
+  SIZE_TYPE path_count;
 } msh_lexer;
 
 msh_lexer msh_lexer_new();

src/system/linux/env.c

@@ -85,7 +85,7 @@ const char *msh_env_get(const char *key) {
   return 0;
 };
 
-char *msh_env_get_path() {
+char *msh_env_get_path(SIZE_TYPE *num) {
   msh_linux_env_item *env_item_tail = &env_items;
 
   while (env_item_tail->next != 0) {
@@ -98,6 +98,7 @@ char *msh_env_get_path() {
           *newenv_ptr = '\0';
         }
         newenv_ptr++;
+        *num += 1;
       }
       return newenv;
     }

src/system/system.h

@@ -133,7 +133,7 @@ void msh_env_set(const char *key, char *value);
  * path, ending in two NULLs.
  * The resulting string is owned by the caller and must be freed appropriately.
  */
-char *msh_env_get_path();
+char *msh_env_get_path(SIZE_TYPE *num);
 
 /*
  * System path seperator