Update license and remove unused files.

programs/cat.c

@@ -1,6 +1,6 @@
 /// @file cat.c
 /// @brief `cat` program.
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <fcntl.h>

programs/clear.c

@@ -1,6 +1,6 @@
 /// @file clear.c
 /// @brief `clear` program.
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <stdio.h>

programs/cpuid.c

@@ -1,6 +1,6 @@
 /// @file cpuid.c
 /// @brief `cpuid` program.
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <stdio.h>

programs/date.c

@@ -1,6 +1,6 @@
 /// @file date.c
 /// @brief `date` program.
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <stdio.h>

programs/echo.c

@@ -1,6 +1,6 @@
 /// @file echo.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <stdio.h>

programs/env.c

@@ -1,6 +1,6 @@
 /// @file env.c
 /// @brief `env` program.
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/unistd.h>

programs/init.c

@@ -1,6 +1,6 @@
 /// @file init.c
 /// @brief `init` program.
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/unistd.h>

programs/ipcrm.c

@@ -1,6 +1,6 @@
 /// @file ipcrm.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 int main(int argc, char **argv)

programs/ipcs.c

@@ -1,6 +1,6 @@
 /// @file ipcs.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #if 0

programs/kill.c

@@ -1,6 +1,6 @@
 /// @file kill.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <stdio.h>

programs/login.c

@@ -1,6 +1,6 @@
 ///// @file login.c
 /// @brief Functions used to manage login.
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 /// Maximum length of credentials.

programs/logo.c

@@ -1,6 +1,6 @@
 /// @file logo.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <stdio.h>

programs/ls.c

@@ -1,6 +1,6 @@
 /// @file ls.c
 /// @brief Command 'ls'.
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/dirent.h>

programs/man.c

@@ -1,6 +1,6 @@
 /// @file man.c
 /// @brief Shows the available commands.
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <strerror.h>

programs/mkdir.c

@@ -1,6 +1,6 @@
 /// @file mkdir.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <stdio.h>

programs/nice.c

@@ -1,6 +1,6 @@
 /// @file nice.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/unistd.h>

programs/poweroff.c

@@ -1,6 +1,6 @@
 /// @file poweroff.c
 /// @brief  
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/reboot.h>

programs/ps.c

@@ -1,6 +1,6 @@
 /// @file ps.c
 /// @brief Report a snapshot of the current processes.
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/unistd.h>

programs/pwd.c

@@ -1,6 +1,6 @@
 /// @file pwd.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/unistd.h>

programs/rm.c

@@ -1,6 +1,6 @@
 /// @file rm.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <stdio.h>

programs/rmdir.c

@@ -1,6 +1,6 @@
 /// @file rmdir.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <stdio.h>

programs/shell.c

@@ -1,6 +1,6 @@
 /// @file shell.c
 /// @brief Implement shell functions.
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/unistd.h>

programs/showpid.c

@@ -1,6 +1,6 @@
 /// @file showpid.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/unistd.h>

programs/sleep.c

@@ -1,6 +1,6 @@
 /// @file sleep.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <stdio.h>

programs/tests/t_abort.c

@@ -1,6 +1,6 @@
 /// @file t_abort.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/unistd.h>

programs/tests/t_alarm.c

@@ -1,6 +1,6 @@
 /// @file t_alarm.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/unistd.h>

programs/tests/t_exec.c

@@ -1,6 +1,6 @@
 /// @file t_exec.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <stdio.h>

programs/tests/t_exec_callee.c

@@ -1,6 +1,6 @@
 /// @file t_exec_callee.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <stdlib.h>

programs/tests/t_fork.c

@@ -1,6 +1,6 @@
 /// @file t_fork.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <stdio.h>

programs/tests/t_getenv.c

@@ -1,6 +1,6 @@
 /// @file t_getenv.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <stdio.h>

programs/tests/t_gid.c

@@ -1,6 +1,6 @@
 /// @file t_gid.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include "grp.h"

programs/tests/t_groups.c

@@ -1,6 +1,6 @@
 /// @file t_groups.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/unistd.h>

programs/tests/t_itimer.c

@@ -1,6 +1,6 @@
 /// @file t_itimer.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/unistd.h>

programs/tests/t_kill.c

@@ -1,6 +1,6 @@
 /// @file t_kill.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/unistd.h>

programs/tests/t_mem.c

@@ -1,6 +1,6 @@
 /// @file t_mem.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <stdio.h>

programs/tests/t_periodic1.c

@@ -1,6 +1,6 @@
 /// @file t_periodic1.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <stdio.h>

programs/tests/t_periodic2.c

@@ -1,6 +1,6 @@
 /// @file t_periodic2.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <stdio.h>

programs/tests/t_periodic3.c

@@ -1,6 +1,6 @@
 /// @file t_periodic3.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <stdio.h>

programs/tests/t_setenv.c

@@ -1,6 +1,6 @@
 /// @file t_setenv.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <stdio.h>

programs/tests/t_sigaction.c

@@ -1,6 +1,6 @@
 /// @file t_sigaction.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/unistd.h>

programs/tests/t_sigfpe.c

@@ -1,6 +1,6 @@
 /// @file t_sigfpe.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/unistd.h>

programs/tests/t_siginfo.c

@@ -1,6 +1,6 @@
 /// @file t_siginfo.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/unistd.h>

programs/tests/t_sigmask.c

@@ -1,6 +1,6 @@
 /// @file t_sigmask.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/unistd.h>

programs/tests/t_sigusr.c

@@ -1,6 +1,6 @@
 /// @file t_sigusr.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/unistd.h>

programs/tests/t_sleep.c

@@ -1,6 +1,6 @@
 /// @file t_sleep.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/unistd.h>

programs/tests/t_stopcont.c

@@ -1,6 +1,6 @@
 /// @file t_stopcont.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/unistd.h>

programs/touch.c

@@ -1,6 +1,6 @@
 /// @file touch.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/unistd.h>

programs/uname.c

@@ -1,6 +1,6 @@
 /// @file uname.c
 /// @brief
-/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
+/// @copyright (c) 2014-2022 This file is distributed under the MIT License.
 /// See LICENSE.md for details.
 
 #include <sys/utsname.h>