Enrico Fraccaroli
40 lines
1.0 KiB
C
40 lines
1.0 KiB
C
/// @file uptime.c
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/// @brief
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/// @copyright (c) 2014-2023 This file is distributed under the MIT License.
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/// See LICENSE.md for details.
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <sys/unistd.h>
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#include <sys/stat.h>
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int main(){
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int uptime_fd = open("/proc/uptime", O_RDONLY, 0600);
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if(uptime_fd == -1){
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printf("Impossible to retrieve /proc/uptime file");
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return -1;
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}
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// Read the content of /proc/uptime
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char buffer[64];
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if(read(uptime_fd, buffer, sizeof(char)*64) == -1){
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printf("Impossible to read /proc/uptime content");
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return -1;
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}
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int uptime = atoi(buffer);
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// Transform uptime into hours, days, mins, and seconds
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int updays = uptime / 86400;
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int uphours = (uptime - (updays * 86400)) / 3600;
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int upmins = (uptime - (updays * 86400) - (uphours * 3600)) / 60;
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int upseconds = (uptime - (updays * 86400) - (uphours * 3600) - (upmins * 60));
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printf("Days: %d Hours: %d Minutes: %d Seconds: %d \n", updays, uphours, upmins, upseconds);
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close(uptime_fd);
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return 0;
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}
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