mirror of
https://github.com/LadybirdBrowser/ladybird.git
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160 lines
4 KiB
C++
160 lines
4 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibCore/ArgsParser.h>
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#include <alloca.h>
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#include <grp.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <unistd.h>
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static int print_id_objects();
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static bool flag_print_uid = false;
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static bool flag_print_gid = false;
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static bool flag_print_name = false;
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static bool flag_print_gid_all = false;
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int main(int argc, char** argv)
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{
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if (unveil("/etc/passwd", "r") < 0) {
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perror("unveil");
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return 1;
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}
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if (unveil("/etc/group", "r") < 0) {
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perror("unveil");
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return 1;
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}
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if (unveil(nullptr, nullptr) < 0) {
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perror("unveil");
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return 1;
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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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Core::ArgsParser args_parser;
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args_parser.add_option(flag_print_uid, "Print UID", nullptr, 'u');
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args_parser.add_option(flag_print_gid, "Print GID", nullptr, 'g');
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args_parser.add_option(flag_print_gid_all, "Print all GIDs", nullptr, 'G');
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args_parser.add_option(flag_print_name, "Print name", nullptr, 'n');
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args_parser.parse(argc, argv);
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if (flag_print_name && !(flag_print_uid || flag_print_gid || flag_print_gid_all)) {
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warnln("cannot print only names or real IDs in default format");
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return 1;
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}
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if (flag_print_uid + flag_print_gid + flag_print_gid_all > 1) {
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warnln("cannot print \"only\" of more than one choice");
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return 1;
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}
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int status = print_id_objects();
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return status;
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}
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static bool print_uid_object(uid_t uid)
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{
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if (flag_print_name) {
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struct passwd* pw = getpwuid(uid);
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out("{}", pw ? pw->pw_name : "n/a");
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} else
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out("{}", uid);
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return true;
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}
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static bool print_gid_object(gid_t gid)
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{
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if (flag_print_name) {
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struct group* gr = getgrgid(gid);
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out("{}", gr ? gr->gr_name : "n/a");
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} else
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out("{}", gid);
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return true;
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}
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static bool print_gid_list()
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{
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int extra_gid_count = getgroups(0, nullptr);
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if (extra_gid_count) {
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auto* extra_gids = (gid_t*)alloca(extra_gid_count * sizeof(gid_t));
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int rc = getgroups(extra_gid_count, extra_gids);
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if (rc < 0) {
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perror("\ngetgroups");
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return false;
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}
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for (int g = 0; g < extra_gid_count; ++g) {
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auto* gr = getgrgid(extra_gids[g]);
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if (flag_print_name && gr)
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out("{}", gr->gr_name);
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else
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out("{}", extra_gids[g]);
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if (g != extra_gid_count - 1)
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out(" ");
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}
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}
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return true;
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}
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static bool print_full_id_list()
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{
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uid_t uid = getuid();
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gid_t gid = getgid();
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struct passwd* pw = getpwuid(uid);
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struct group* gr = getgrgid(gid);
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out("uid={}({}) gid={}({})", uid, pw ? pw->pw_name : "n/a", gid, gr ? gr->gr_name : "n/a");
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int extra_gid_count = getgroups(0, nullptr);
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if (extra_gid_count) {
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auto* extra_gids = (gid_t*)alloca(extra_gid_count * sizeof(gid_t));
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int rc = getgroups(extra_gid_count, extra_gids);
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if (rc < 0) {
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perror("\ngetgroups");
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return false;
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}
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out(" groups=");
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for (int g = 0; g < extra_gid_count; ++g) {
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auto* gr = getgrgid(extra_gids[g]);
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if (gr)
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out("{}({})", extra_gids[g], gr->gr_name);
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else
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out("{}", extra_gids[g]);
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if (g != extra_gid_count - 1)
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out(",");
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}
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}
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return true;
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}
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static int print_id_objects()
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{
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if (flag_print_uid) {
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if (!print_uid_object(getuid()))
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return 1;
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} else if (flag_print_gid) {
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if (!print_gid_object(getgid()))
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return 1;
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} else if (flag_print_gid_all) {
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if (!print_gid_list())
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return 1;
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} else {
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if (!print_full_id_list())
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return 1;
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}
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outln();
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return 0;
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}
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