Adding easter egg widget

When calling the widget "syzdek", the package name will scroll around the
screen.

4 files changed, 90 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index f5ee506..41d86e2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -6,6 +6,7 @@ Copyright (C) 2015, 2017 David M. Syzdek <david@syzdek.net>.
   - core: adding ability to disable creating widget symlinks (syzdek)
   - core: updating copyright notices (syzdek)
   - core: adding ability to change widget alias prefix at compile time (syzdek)
+  - syzdek: adding easter egg widget (syzdek)
   - tail: allowing timeout to be modified via env variable TAILTIMEOUT (syzdek)
   - zcat: fixing segfault with LXMA (.xz) and large files (syzdek)
 
diff --git a/acinclude.m4 b/acinclude.m4
index 8c0b90c..f24e2f9 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -58,6 +58,24 @@ AC_DEFUN([AC_SCU_PREFIX],[dnl
 ])dnl
 
 
+# AC_SCU_EGG
+# ______________________________________________________________________________
+AC_DEFUN([AC_SCU_EGG],[dnl
+
+   enableval=""
+   AC_ARG_ENABLE(
+      easter-egg,
+      [AS_HELP_STRING([--disable-easter-egg], [disable easter egg widget])],
+      [ EEASTER_EGGS=$enableval ],
+      [ EEASTER_EGGS=$enableval ]
+   )
+
+   if test "x${EEASTER_EGGS}" != "xno";then
+      AC_DEFINE_UNQUOTED(SCU_EASTER_EGGS, 1, [enable easter egg widget])
+   fi
+])dnl
+
+
 # AC_SCU_SYMLINKS
 # ______________________________________________________________________________
 AC_DEFUN([AC_SCU_SYMLINKS],[dnl
diff --git a/configure.ac b/configure.ac
index f96ea1d..8aaaee7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -163,6 +163,7 @@ AC_BINDLE_GIT_PACKAGE_VERSION([contrib/bindletools/build-aux/git-package-version
 
 # custom configure options
 AC_BINDLE_ENABLE_WARNINGS
+AC_SCU_EGG
 AC_SCU_PREFIX
 AC_SCU_SYMLINKS
 AC_SCU_WIDGET_TAIL
diff --git a/src/securecoreutils.c b/src/securecoreutils.c
index 03a3d81..880d410 100644
--- a/src/securecoreutils.c
+++ b/src/securecoreutils.c
@@ -44,6 +44,9 @@
 #include "securecoreutils.h"
 
 #include <stdio.h>
+#include <termios.h>
+#include <sys/ioctl.h>
+#include <math.h>
 #include <assert.h>
 #include <string.h>
 #include <strings.h>
@@ -82,6 +85,7 @@
 int main(int argc, char * argv[]);
 const char * scu_basename(const char * path);
 const scu_widget * scu_widget_lookup(const char * wname, int exact);
+int scu_widget_syzdek(scu_config * cnf);
 
 
 /////////////////
@@ -119,6 +123,14 @@ const scu_widget scu_widget_map[] =
       (const char * const[]) { _PREFIX"rmdir", NULL },// widget alias
       scu_widget_rmdir,                               // widget function
    },
+#ifdef SCU_EASTER_EGGS
+   {
+      "syzdek",                                       // widget name
+      NULL,                                           // widget description
+      (const char * const[]) { "david", NULL },       // widget alias
+      scu_widget_syzdek,                              // widget function
+   },
+#endif
    {
       "tail",                                         // widget name
       "Writes contents of file to standard out.",     // widget description
@@ -345,6 +357,8 @@ void scu_usage(scu_config * cnf)
    {
       if (scu_widget_map[x].func == NULL)
          continue;
+      if (scu_widget_map[x].desc == NULL)
+         continue;
       printf("   %-24s %s\n", scu_widget_map[x].name, scu_widget_map[x].desc);
    };
    printf("\n");
@@ -356,6 +370,8 @@ void scu_usage(scu_config * cnf)
          continue;
       if (scu_widget_map[x].alias == NULL)
          continue;
+      if (scu_widget_map[x].desc == NULL)
+         continue;
       printf("   %-24s %s\n", scu_widget_map[x].name, scu_widget_map[x].alias[0]);
       for (y = 1; scu_widget_map[x].alias[y] != NULL; y++)
          printf("      %-21s %s\n", " ", scu_widget_map[x].alias[y]);
@@ -465,6 +481,9 @@ const scu_widget * scu_widget_lookup(const char * wname, int exact)
    prefix_uniq    = -1;
    prefix_common  = -1;
 
+   if (!(strcasecmp(PROGRAM_NAME, wname)))
+      return(NULL);
+
    for(x = 0; scu_widget_map[x].name != NULL; x++)
    {
       widget = &scu_widget_map[x];
@@ -522,6 +541,57 @@ const scu_widget * scu_widget_lookup(const char * wname, int exact)
 }
 
 
+#ifdef SCU_EASTER_EGGS
+int scu_widget_syzdek(scu_config * cnf)
+{
+   unsigned  z;
+   double    x;
+   double    w;
+   double    h;
+#ifdef TIOCGSIZE
+   struct ttysize b;
+#else
+   struct winsize b;
+#endif
+   const char * package = "Secure Core Utilities";
+   const char * author  = "by David M. Syzdek";
+   const char * msg     = PACKAGE_NAME " v" PACKAGE_VERSION " by David M. Syzdek";
+
+   assert(cnf != NULL);
+
+   x = 0.0;
+
+   while(1)
+   {
+#ifdef TIOCGSIZE
+      w = ioctl(0,TIOCGSIZE,&b) ? 80 : b.ts_cols;
+      h = b.ts_lines;
+#else
+      w = ioctl(0,TIOCGWINSZ,&b) ? 80 : b.ws_col;
+      h = b.ws_row;
+#endif
+      for (z = 0; z < strlen(msg)+1; z++)
+      {
+         printf("\033[%i;%iH\033[1;%im%c\033[0m",
+            //(int)((sin(((x-z)*(360.0/h))/57.3)*(h/2.0))+((h/2.0)+1.0)),
+            (int)(( sin(((x-z)*(360.0/h))/80) * (h/2.0)) + ((h/2.0)+1.0) ),
+            (int)(( sin(((x-z)*(360.0/w))/80) * (w/2.0)) + ((w/2.0)+1.0) ),
+            30+(z%8),
+            msg[z]);
+      };
+      printf("\033[%i;%iH%s", (int)h-1, (int)w - (int)strlen(package), package);
+      printf("\033[%i;%iH%s", (int)h, (int)w - (int)strlen(author), author);
+      fflush(stdout);
+      usleep(100000);
+      printf("\033[2J\033[512;512H");
+      x += 1;
+   };
+
+   return(0);
+}
+#endif
+
+
 const char * scu_strerror(int err)
 {
    if (err < 0)