From 405e73ce65cf048c49c6e57a62f60c3f9c83faf8 Mon Sep 17 00:00:00 2001
From: Rob Landley <rob@landley.net>
Date: Sun, 4 Mar 2012 00:50:44 -0600
Subject: [PATCH] Add longopt, refactor so only one instance of each loop,
 requre = as part of match, update exit code.

---
 toys/printenv.c | 38 ++++++++++++++++++++------------------
 1 file changed, 20 insertions(+), 18 deletions(-)

diff --git a/toys/printenv.c b/toys/printenv.c
index da75acd..305b3e7 100644
--- a/toys/printenv.c
+++ b/toys/printenv.c
@@ -5,16 +5,17 @@
  * Copyright 2012 Georgi Chorbadzhiyski <georgi@unixsol.org>
  *
 
-USE_PRINTENV(NEWTOY(printenv, "0", TOYFLAG_USR|TOYFLAG_BIN))
+USE_PRINTENV(NEWTOY(printenv, "0(null)", TOYFLAG_USR|TOYFLAG_BIN))
 
 config PRINTENV
 	bool "printenv"
 	default y
 	help
 	  usage: printenv [-0] [env_var...]
-	  Print enviroment variables.
 
-	  -0	Use \0 as environment delimiter instead of \n
+	  Print environment variables.
+
+	  -0	Use \0 as delimiter instead of \n
 */
 
 #include "toys.h"
@@ -23,23 +24,24 @@ extern char **environ;
 
 void printenv_main(void)
 {
-	char **env;
+	char **env, **var = toys.optargs;
 	char delim = '\n';
 
-	if (toys.optflags)
-		delim = '\0';
-
-	if (!toys.optargs[0]) {
-		for (env = environ; *env; env++)
-			xprintf("%s%c", *env, delim);
-	} else {
-		char **var = toys.optargs;
-		for (var = toys.optargs; *var; var++) {
-			int len = strlen(*var);
-			for (env = environ; *env; env++) {
-				if (strncmp(*env, *var, len) == 0)
-					xprintf("%s%c", *env + len + 1, delim);
+	if (toys.optflags) delim = 0;
+
+	do {
+		int catch = 0, len = *var ? strlen(*var) : 0;
+
+		for (env = environ; *env; env++) {
+			char *out = *env;
+			if (*var) {
+				if (!strncmp(out, *var, len) && out[len] == '=')
+					out += len +1;
+				else continue;
 			}
+			xprintf("%s%c", out, delim);
+			catch++;
 		}
-	}
+		if (*var && !catch) toys.exitval = 1;
+	} while (*var && *(++var));
 }
-- 
2.7.4