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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <unistd.h>
int main(int, char**)
{
if (pledge("stdio rpath", nullptr) < 0) {
perror("pledge");
return 1;
}
FILE* fp = fopen("/proc/uptime", "r");
if (!fp) {
perror("fopen(/proc/uptime)");
return 1;
}
if (pledge("stdio", nullptr) < 0) {
perror("pledge");
return 1;
}
char buffer[BUFSIZ];
auto* p = fgets(buffer, sizeof(buffer), fp);
if (!p) {
perror("fgets");
return 1;
}
unsigned seconds;
sscanf(buffer, "%u", &seconds);
printf("Up ");
if (seconds / 86400 > 0) {
printf("%d day%s, ", seconds / 86400, (seconds / 86400) == 1 ? "" : "s");
seconds %= 86400;
}
if (seconds / 3600 > 0) {
printf("%d hour%s, ", seconds / 3600, (seconds / 3600) == 1 ? "" : "s");
seconds %= 3600;
}
if (seconds / 60 > 0) {
printf("%d minute%s, ", seconds / 60, (seconds / 60) == 1 ? "" : "s");
seconds %= 60;
}
printf("%d second%s\n", seconds, seconds == 1 ? "" : "s");
fclose(fp);
return 0;
}
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