From d8baf576057910f7773ca9bccc59e024279ccea9 Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@x1-nano.kaivo.local>
Date: Sat, 1 Apr 2023 21:54:14 -0400
Subject: basic implementation of type

---
 builtins.c |  2 ++
 type.c     | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 57 insertions(+), 2 deletions(-)

diff --git a/builtins.c b/builtins.c
index a1952fa..55d765e 100644
--- a/builtins.c
+++ b/builtins.c
@@ -79,6 +79,7 @@ int newgrp_main(int argc, char *argv[]);
 int pwd_main(int argc, char *argv[]);
 int read_main(int argc, char *argv[]);
 int true_main(int argc, char *argv[]);
+int type_main(int argc, char *argv[]);
 int ulimit_main(int argc, char *argv[]);
 int umask_main(int argc, char *argv[]);
 int unalias_main(int argc, char *argv[]);
@@ -103,6 +104,7 @@ static struct builtin regular_builtins[] = {
 	{ "pwd", pwd_main },
 	{ "read", read_main },
 	{ "true", true_main },
+	{ "type", type_main },
 	{ "ulimit", ulimit_main },
 	{ "umask", umask_main },
 	{ "unalias", unalias_main },
diff --git a/type.c b/type.c
index b3f0bf5..4be22c1 100644
--- a/type.c
+++ b/type.c
@@ -1,7 +1,60 @@
+#include "sh.h"
 #include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
 
 int type_main(int argc, char **argv)
 {
-	printf("Sorry, %s isn't implemented yet.\n", argv[0]);
-	return argc;
+	int c;
+	while ((c = getopt(argc, argv, "")) != -1) {
+		switch (c) {
+		default:
+			return 1;
+		}
+	}
+
+	if (optind >= argc) {
+		fprintf(stderr, "type: missing operands\n");
+		return 1;
+	}
+
+	int ret = 0;
+	for (int i = optind; i < argc; i++) {
+		if (sh_is_special_builtin(argv[i])) {
+			printf("%s: special built-in\n", argv[i]);
+			continue;
+		}
+
+		/*
+		if (sh_is_function(argv[i])) {
+			printf("%s: function\n", argv[i]);
+			continue;
+		}
+		*/
+
+		if (sh_is_regular_builtin(argv[i])) {
+			printf("%s: built-in\n", argv[i]);
+			continue;
+		}
+
+		char *alias = sh_get_alias(argv[i]);
+		if (alias != NULL) {
+			printf("%s: alias (%s)\n", argv[i], alias);
+			continue;
+		}
+
+		// keyword
+
+		char *path = sh_find_in_path(argv[i], "PATH");
+		if (path) {
+			printf("%s: %s\n", argv[i], path);
+			free(path);
+			continue;
+		}
+
+		fprintf(stderr, "type: %s not found\n", argv[i]);
+		ret = 1;
+	}
+
+	return ret;
 }
-- 
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