From 22c27e1ba9f83603953291182e5904d126e9ea87 Mon Sep 17 00:00:00 2001
From: Kenneth Myhra <kennethmyhra@gmail.com>
Date: Tue, 21 Dec 2021 20:22:53 +0100
Subject: [PATCH] fgrep: Port fgrep to LibMain

---
 Userland/Utilities/CMakeLists.txt |  1 +
 Userland/Utilities/fgrep.cpp      | 19 ++++++++++---------
 2 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/Userland/Utilities/CMakeLists.txt b/Userland/Utilities/CMakeLists.txt
index bd4e82b6c7..0df6a63878 100644
--- a/Userland/Utilities/CMakeLists.txt
+++ b/Userland/Utilities/CMakeLists.txt
@@ -91,6 +91,7 @@ target_link_libraries(env LibMain)
 target_link_libraries(errno LibMain)
 target_link_libraries(expr LibRegex LibMain)
 target_link_libraries(fdtdump LibDeviceTree LibMain)
+target_link_libraries(fgrep LibMain)
 target_link_libraries(file LibGfx LibIPC LibCompress LibMain)
 target_link_libraries(find LibMain)
 target_link_libraries(flock LibMain)
diff --git a/Userland/Utilities/fgrep.cpp b/Userland/Utilities/fgrep.cpp
index cdbbd7bbd9..76d55756d5 100644
--- a/Userland/Utilities/fgrep.cpp
+++ b/Userland/Utilities/fgrep.cpp
@@ -4,25 +4,26 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#include "AK/String.h"
 #include <AK/Assertions.h>
 #include <AK/Format.h>
+#include <LibCore/System.h>
+#include <LibMain/Main.h>
 #include <stdio.h>
-#include <string.h>
-#include <unistd.h>
 
-int main(int argc, char** argv)
+ErrorOr<int> serenity_main(Main::Arguments arguments)
 {
-    if (argc < 2) {
+    if (arguments.strings.size() < 2) {
         warnln("usage: fgrep <str>");
         return 1;
     }
     for (;;) {
-        char buf[4096];
-        auto* str = fgets(buf, sizeof(buf), stdin);
-        if (str && strstr(str, argv[1]))
-            write(1, buf, strlen(buf));
+        char buffer[4096];
+        auto str = StringView(fgets(buffer, sizeof(buffer), stdin));
+        if (str.contains(arguments.strings[1]))
+            TRY(Core::System::write(1, str.bytes()));
         if (feof(stdin))
             return 0;
-        VERIFY(str);
+        VERIFY(str.to_string().characters());
     }
 }