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