Userland: Fix many compiler warnings.

Userland/al.cpp

@@ -1,11 +1,15 @@
+#include <AK/StdLibExtras.h>
 #include <signal.h>
 #include <stdio.h>
 #include <unistd.h>
 
 static volatile bool got_alarm = false;
 
-int main(int c, char** v)
+int main(int argc, char** argv)
 {
+    UNUSED_PARAM(argc);
+    UNUSED_PARAM(argv);
+
     unsigned ret = alarm(5);
     printf("alarm() with no alarm set: %u\n", ret);
     ret = alarm(2);

Userland/head.cpp

@@ -16,7 +16,7 @@ int main(int argc, char** argv)
     args_parser.add_arg("q", "Never print filenames");
     args_parser.add_arg("v", "Always print filenames");
 
-    CArgsParserResult args = args_parser.parse(argc, (const char**)argv);
+    CArgsParserResult args = args_parser.parse(argc, argv);
 
     int line_count = 0;
     if (args.is_present("n")) {

Userland/ln.cpp

@@ -12,7 +12,7 @@ int main(int argc, char** argv)
     args_parser.add_required_single_value("target");
     args_parser.add_required_single_value("link-path");
 
-    CArgsParserResult args = args_parser.parse(argc, (const char**)argv);
+    CArgsParserResult args = args_parser.parse(argc, argv);
     Vector<String> values = args.get_single_values();
     if (values.size() == 0) {
         args_parser.print_usage();

Userland/pape.cpp

@@ -58,7 +58,7 @@ int main(int argc, char** argv)
     args_parser.add_arg("c", "show current wallpaper");
     args_parser.add_single_value("name");
 
-    CArgsParserResult args = args_parser.parse(argc, (const char**)argv);
+    CArgsParserResult args = args_parser.parse(argc, argv);
 
     if (args.is_present("a"))
         return handle_show_all();

Userland/pidof.cpp

@@ -39,7 +39,7 @@ int main(int argc, char** argv)
     args_parser.add_arg("s", "Single shot - this instructs the program to only return one pid");
     args_parser.add_arg("o", "pid", "Tells pidof to omit processes with that pid. The special pid %PPID can be used to name the parent process of the pidof program.");
 
-    CArgsParserResult args = args_parser.parse(argc, (const char**)argv);
+    CArgsParserResult args = args_parser.parse(argc, argv);
 
     bool s_arg = args.is_present("s");
     bool o_arg = args.is_present("o");

Userland/rm.cpp

@@ -58,7 +58,7 @@ int main(int argc, char** argv)
     args_parser.add_arg("r", "Delete directory recursively.");
     args_parser.add_required_single_value("path");
 
-    CArgsParserResult args = args_parser.parse(argc, (const char**)argv);
+    CArgsParserResult args = args_parser.parse(argc, argv);
     Vector<String> values = args.get_single_values();
     if (values.size() == 0) {
         args_parser.print_usage();

Userland/shutdown.cpp

@@ -5,7 +5,7 @@ int main(int argc, char** argv)
 {
     CArgsParser args_parser("shutdown");
     args_parser.add_arg("n", "shut down now");
-    CArgsParserResult args = args_parser.parse(argc, (const char**)argv);
+    CArgsParserResult args = args_parser.parse(argc, argv);
 
     if (args.is_present("n")) {
         syscall(SC_halt);

Userland/sysctl.cpp

@@ -56,7 +56,6 @@ static int handle_show_all()
         return 1;
     }
 
-    char pathbuf[PATH_MAX];
     while (di.has_next()) {
         String variable_name = di.next_path();
         printf("%s = %s\n", variable_name.characters(), read_var(variable_name).characters());
@@ -89,7 +88,7 @@ int main(int argc, char** argv)
     args_parser.add_arg("a", "show all variables");
     args_parser.add_single_value("variable=[value]");
 
-    CArgsParserResult args = args_parser.parse(argc, (const char**)argv);
+    CArgsParserResult args = args_parser.parse(argc, argv);
 
     if (args.is_present("a")) {
         return handle_show_all();

Userland/tail.cpp

@@ -82,7 +82,7 @@ int main(int argc, char* argv[])
     args_parser.add_arg("n", "lines", "fetch the specified number of lines");
     args_parser.add_required_single_value("file");
 
-    CArgsParserResult args = args_parser.parse(argc, (const char**)argv);
+    CArgsParserResult args = args_parser.parse(argc, argv);
 
     Vector<String> values = args.get_single_values();
     if (values.size() != 1) {

Userland/wc.cpp

@@ -5,9 +5,9 @@
 #include <ctype.h>
 #include <stdio.h>
 
-bool output_chars = false;
-bool output_words = false;
-bool output_lines = false;
+static bool output_chars = false;
+static bool output_words = false;
+static bool output_lines = false;
 
 struct Count {
     String file;
@@ -74,7 +74,7 @@ int main(int argc, char** argv)
     args_parser.add_arg("c", "Include bytes in count");
     args_parser.add_arg("m", "Include chars in count");
     args_parser.add_arg("w", "Include words in count");
-    CArgsParserResult args = args_parser.parse(argc, (const char**)argv);
+    CArgsParserResult args = args_parser.parse(argc, (char**)argv);
 
     if (args.is_present("l")) {
         output_lines = true;