csm.c

opensolaris下列出top进程

#include "gui.h"

#define INTERVALL 250000

int
main (int argc, char **argv)
{
  int slowdown, i;
  init_csm ();
  init_gui ();
  database *data = init_database ();

  /* mainloop */
  slowdown = 0;
  for (;;)
    {
      usleep (INTERVALL);
      calc_cpu (data);
      calc_net (data);
      calc_mem (data);
      calc_disk (data);

      if (slowdown % 4 == 0)
        calc_top_processes (data);

      unsigned int ncolumns, wcolumn;
      wcolumn = 20;
      ncolumns = (unsigned int) (COLS / 20);
      unsigned int vfree[ncolumns];

      for (i = 0; i < ncolumns; i++)
        {
          vfree[i] = LINES;
        }

      /* output
       * first 5 lines show cpu-usage
       */
      draw_cpu (data, create_dim (0, 0, 5, COLS));
      for (i = 0; i < ncolumns; i++)
        {
          vfree[i] -= 5;
        }

      // set column and vfree
      // return 0 if output wouldn't fit on screen
      int position (unsigned int *vfree, int *current_column, int height)
      {
        if (*current_column > ncolumns)
          {
            *current_column = 0;
          }
        if (height > LINES - 5)
          {
            return 0;
          }                     // no chance to bring this to the screen
        if (vfree[*current_column] < height)
          {
            *current_column += 1;
            position (vfree, current_column, height);
          }
        else
          {
            vfree[*current_column] -= height;
            return 1;
          }
        // XXX: should never reach this
        return 0;
      }

      // TODO: make this more dynamic.
      int current_column;
      current_column = 0;
      if (position (vfree, &current_column, 9))
        draw_mem (data,
                  create_dim (current_column * wcolumn,
                              LINES - vfree[current_column] - 9, 12, 20),
                  MBYTES);

      if (position (vfree, &current_column, 8))
        draw_net (data,
                  create_dim (current_column * wcolumn,
                              LINES - vfree[current_column] - 8, 8, 20),
                  MBYTES);

      if (position (vfree, &current_column, 19))
        draw_disk (data,
                   create_dim (current_column * wcolumn,
                               LINES - vfree[current_column] - 19, 19, 20),
                   MBYTES);

      if (position (vfree, &current_column, NUMBER_PROCESSES))
        draw_top_processes (data,
                            create_dim (current_column * wcolumn,
                                        LINES - vfree[current_column] -
                                        NUMBER_PROCESSES, NUMBER_PROCESSES,
                                        20));

      char input;
      input = getch ();
      // keypress 'q' means quit
      if (input == 'q')
        break;
      // ":" opens a command line
      if (input == ':')
        {
          char str[5];
          echo ();
          nodelay (stdscr, FALSE);
          mvaddstr (LINES - 2, 0, ":");
          getnstr (str, 4);
          // TODO: add more commands
          if (!strcmp (str, "quit"))
            break;
          noecho ();
          nodelay (stdscr, TRUE);
          // clear command line
          // XXX: there must be a better way!
          mvaddstr (LINES - 2, 0,
                    "                                            ");
        }
      if (slowdown > 10000)
        {
          slowdown = 0;
        }
      else
        {
          slowdown++;
        }
    }
  free_database (data);
  quit_gui ();
  return 0;
}