src/bin/uptime.cpp

   1 /************
   2  **     from http://www.beatjapan.org/mirror/www.be.com/beware/Utilities/uptime.html
   3  **     archive ftp://ftp.halcyon.com/pub/users/jrashmun/uptime.zip
   4  **     License : Freeware
   5 *************/
   6
   7 #include <stdio.h>
   8 #include <string.h>
   9 #include <time.h>
  10
  11 #include <SupportDefs.h>
  12 #include <OS.h>
  13
  14 void Usage( );
  15
  16 void Usage( )
  17 {
  18    printf( "\nUsage:  uptime [-u]\n" );
  19    printf( "Prints the current date and time, as well\n" );
  20    printf( "as the time elapsed since the system was started.\n" );
  21    printf( "The optional argument omits the current date and time.\n\n" );
  22 }
  23
  24 int main( int argc, char* argv[] )
  25 {
  26    char            buf[255];
  27    const char*     day_strings[] = { "day", "days" };
  28    const char*     hour_strings[] = { "hour", "hours" };
  29    const char*     minute_strings[] = { "minute", "minutes" };
  30    const char*     day_string = 0;
  31    const char*     hour_string = 0;
  32    const char*     minute_string = 0;
  33    int             print_uptime_only = 0;
  34    time_t          current_time = 0;
  35    const time_t    secs_per_day = 86400;
  36    const time_t    secs_per_hour = 3600;
  37    const time_t    secs_per_minute = 60;
  38    time_t          uptime_days = 0;
  39    time_t          uptime_hours = 0;
  40    time_t          uptime_minutes = 0;
  41    time_t          uptime_secs = 0;
  42    const bigtime_t usecs_per_sec = 1000000L;
  43    bigtime_t       uptime_usecs = 0;
  44    bigtime_t       usecs_since_sec = 0;
  45
  46    if( argc > 2 )
  47    {
  48       Usage( );
  49       return 1;
  50    }
  51
  52    if( argc == 2 )
  53    {
  54       if( !strcmp( argv[1], "-u" ) )
  55          print_uptime_only = 1;
  56       else
  57       {
  58          Usage( );
  59          return 2;
  60       }
  61    }
  62
  63    uptime_usecs = system_time( );
  64
  65    uptime_secs = uptime_usecs / usecs_per_sec;
  66    usecs_since_sec = uptime_usecs % usecs_per_sec;
  67    if( usecs_since_sec >= (usecs_per_sec / 2) )
  68       uptime_secs++;
  69
  70    uptime_days = uptime_secs / secs_per_day;
  71    uptime_hours = (uptime_secs % secs_per_day) / secs_per_hour;
  72    uptime_minutes = (uptime_secs % secs_per_hour) / secs_per_minute;
  73
  74    current_time = time( 0 );
  75
  76    if( !print_uptime_only )
  77    {
  78       strcpy( buf, ctime( &current_time ) );
  79
  80       buf[strlen( buf ) - 1] = '\0';
  81    }
  82
  83    day_string = (uptime_days == 1) ? day_strings[0] : day_strings[1];
  84    hour_string = (uptime_hours == 1) ? hour_strings[0] : hour_strings[1];
  85    minute_string = (uptime_minutes == 1) ? minute_strings[0] : minute_strings[1];
  86
  87    if( uptime_days && uptime_hours && uptime_minutes )
  88    {
  89       if( !print_uptime_only )
  90          printf( "%s, up %ld %s, %ld %s, %ld %s\n", buf,
  91                  uptime_days, day_string,
  92                  uptime_hours, hour_string,
  93                  uptime_minutes, minute_string );
  94       else
  95          printf( "up %ld %s, %ld %s, %ld %s\n",
  96                  uptime_days, day_string,
  97                  uptime_hours, hour_string,
  98                  uptime_minutes, minute_string );
  99    }
 100    else if( !uptime_days )
 101    {
 102       if( uptime_hours && uptime_minutes )
 103       {
 104          if( !print_uptime_only )
 105             printf( "%s, up %ld %s, %ld %s\n", buf,
 106                     uptime_hours, hour_string,
 107                     uptime_minutes, minute_string );
 108          else
 109             printf( "up %ld %s, %ld %s\n",
 110                     uptime_hours, hour_string,
 111                     uptime_minutes, minute_string );
 112       }
 113       else if( uptime_hours )
 114       {
 115          if( !print_uptime_only )
 116             printf( "%s, up %ld %s\n", buf,
 117                     uptime_hours, hour_string );
 118          else
 119             printf( "up %ld %s\n",
 120                     uptime_hours, hour_string );
 121       }
 122       else
 123       {
 124          if( !print_uptime_only )
 125             printf( "%s, up %ld %s\n", buf,
 126                     uptime_minutes, minute_string );
 127          else
 128             printf( "up %ld %s\n",
 129                     uptime_minutes, minute_string );
 130       }
 131    }
 132    else if( uptime_hours )
 133    {
 134       if( !print_uptime_only )
 135          printf( "%s, up %ld %s, %ld %s\n", buf,
 136                  uptime_days, day_string,
 137                  uptime_hours, hour_string );
 138       else
 139          printf( "up %ld %s, %ld %s\n",
 140                  uptime_days, day_string,
 141                  uptime_hours, hour_string );
 142    }
 143    else if( uptime_minutes )
 144    {
 145       if( !print_uptime_only )
 146          printf( "%s, up %ld %s, %ld %s\n", buf,
 147                  uptime_days, day_string,
 148                  uptime_minutes, minute_string );
 149       else
 150          printf( "up %ld %s, %ld %s\n",
 151                  uptime_days, day_string,
 152                  uptime_minutes, minute_string );
 153    }
 154    else
 155    {
 156       if( !print_uptime_only )
 157          printf( "%s, up %ld %s\n", buf,
 158                  uptime_days, day_string );
 159       else
 160          printf( "up %ld %s\n",
 161                  uptime_days, day_string );
 162    }
 163
 164    return 0;
 165 }
 166