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149 lines
5.2 KiB
149 lines
5.2 KiB
#include <bits/local_lim.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/utsname.h>
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#include <unistd.h>
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/*
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BSD 3-Clause License
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Copyright (c) 2021, Ruthenic
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All rights reserved.
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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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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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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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3. Neither the name of the copyright holder nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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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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/*
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whoami - prints the working user's username (unless --uid is specified)
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Available arguments:
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--help: show this help message
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--version: show the version of the program (WIP)
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--uid: print the users numeric UID, instead of username
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*/
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// https://stackoverflow.com/questions/4770985/how-to-check-if-a-string-starts-with-another-string-in-c/4770992#4770992
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bool startsWithChar(const char *pre, const char str) {
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char *e;
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int index;
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e = strchr(pre, str);
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index = (int)(e - pre);
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return index == 0;
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}
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int un(int argc, char **argv) {
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struct utsname uts;
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uname(&uts);
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char hostname[HOST_NAME_MAX + 1];
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gethostname(hostname, HOST_NAME_MAX + 1);
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if (argc == 1) {
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printf("%s\n", uts.sysname);
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} else {
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for (int i = 1; i < argc; i++) {
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char *arg = argv[i];
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/*printf(arg);
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*/
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if (!strcmp(arg, "--help")) {
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char *help =
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"Drake's Epic Coreutils (working title) " DRAKECU_VERSION "\n"
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"uname - prints system information.\n"
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"Available arguments:\n"
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" --help: show this help message\n"
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" --version: show the version of the program\n"
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" -a, --all: print all information (equivalent to -shrvm). "
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"\n"
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" -s, --sysinfo: kernel type(?)\n"
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" -h, --hostname: hostname\n"
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" -r, --krelease: kernel version\n"
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" -v, --kversion: verbose kernel build version info\n"
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" -m, --arch: cpu architecture\n"
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"Examples:\n"
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" Command:\n"
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" uname -srh\n"
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" Example output (on my system):\n"
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" Linux 5.12.14_1 ruthenic-void";
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printf("%s\n", help);
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return 0;
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} else if (!strcmp(arg, "--version")) {
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printf("%s\n", DRAKECU_VERSION);
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return 0;
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} else if (!strcmp(arg, "--hostname")) {
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char hostname[HOST_NAME_MAX + 1];
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gethostname(hostname, HOST_NAME_MAX + 1);
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printf("%s ", hostname);
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} else if (!strcmp(arg, "--sysinfo")) {
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printf("%s ", uts.sysname);
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} else if (!strcmp(arg, "--krelease")) {
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printf("%s ", uts.release);
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} else if (!strcmp(arg, "--kversion")) {
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printf("%s ", uts.version);
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} else if (!strcmp(arg, "--arch")) {
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printf("%s ", uts.machine);
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} else if (!strcmp(arg, "--all")) {
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// equivalent to -shrvm
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printf("%s ", uts.sysname);
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printf("%s ", hostname);
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printf("%s ", uts.release);
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printf("%s ", uts.version);
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printf("%s ", uts.machine);
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} else if (startsWithChar(arg, '-')) {
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char info;
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for (unsigned long n = 1; n < strlen(arg); n++) {
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info = arg[n];
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// printf(info);
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// printf("\n");
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if (info == 'h') {
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printf("%s ", hostname);
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}
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if (info == 's') {
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printf("%s ", uts.sysname);
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}
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if (info == 'r') {
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printf("%s ", uts.release);
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}
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if (info == 'v') {
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printf("%s ", uts.version);
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}
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if (info == 'm') {
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printf("%s ", uts.machine);
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}
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if (info == 'a') {
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// equivalent to -shrvm
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printf("%s ", uts.sysname);
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char hostname[HOST_NAME_MAX + 1];
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gethostname(hostname, HOST_NAME_MAX + 1);
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printf("%s ", hostname);
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printf("%s ", uts.release);
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printf("%s ", uts.version);
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printf("%s ", uts.machine);
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}
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}
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}
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}
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printf("\n");
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}
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}
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