48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
/* uptime.c -- tells how long the system has been running */
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/* Copyright (c) 2020 Renaud Fivet */
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#include <stdio.h>
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#include "system.h" /* uptime, yield() */
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static void display( unsigned u, const char *s) {
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if( u)
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printf( " %d %s%s", u, s, &"s"[ u <= 1]) ;
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}
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int main( void) {
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static unsigned last ;
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for( ;;)
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if( last != uptime) {
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unsigned w, d, h, m ,s ;
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last = uptime ;
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d = h = m = 0 ;
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s = last % 60 ;
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w = last / 60 ;
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if( w) {
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m = w % 60 ;
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w /= 60 ;
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if( w) {
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h = w % 24 ;
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w /= 24 ;
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if( w) {
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d = w % 7 ;
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w /= 7 ;
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}
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}
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}
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printf( "up") ;
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display( w, "week") ;
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display( d, "day") ;
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display( h, "hour") ;
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display( m, "minute") ;
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display( s, "second") ;
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printf( "\n") ;
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} else
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yield() ; /* Wait for System Tick Interrupt */
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}
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/* end of uptime.c */
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