ladybird/Userland/Utilities/uptime.cpp
Brian Gianforcaro 1682f0b760 Everything: Move to SPDX license identifiers in all files.
SPDX License Identifiers are a more compact / standardized
way of representing file license information.

See: https://spdx.dev/resources/use/#identifiers

This was done with the `ambr` search and replace tool.

 ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
2021-04-22 11:22:27 +02:00

60 lines
1.2 KiB
C++

/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#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;
}