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https://github.com/RGBCube/serenity
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4bbe01def1
The usage message states that a uid/gid spec should be <uid[:gid]>. Let's not allow `anon:`, `anon:users:hello` and `:users` then.
94 lines
3 KiB
C++
94 lines
3 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 <AK/String.h>
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#include <AK/Vector.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 <string.h>
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#include <sys/stat.h>
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#include <unistd.h>
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int main(int argc, char** argv)
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{
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if (pledge("stdio rpath chown", nullptr) < 0) {
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perror("pledge");
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return 1;
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}
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if (argc < 3) {
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printf("usage: chown <uid[:gid]> <path>\n");
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return 0;
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}
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uid_t new_uid = -1;
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gid_t new_gid = -1;
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auto parts = String(argv[1]).split(':', true);
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if (parts.is_empty()) {
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fprintf(stderr, "Empty uid/gid spec\n");
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return 1;
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}
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if (parts[0].is_empty() || (parts.size() == 2 && parts[1].is_empty()) || parts.size() > 2) {
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fprintf(stderr, "Invalid uid/gid spec\n");
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return 1;
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}
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auto number = parts[0].to_uint();
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if (number.has_value()) {
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new_uid = number.value();
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} else {
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auto* passwd = getpwnam(parts[0].characters());
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if (!passwd) {
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fprintf(stderr, "Unknown user '%s'\n", parts[0].characters());
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return 1;
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}
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new_uid = passwd->pw_uid;
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}
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if (parts.size() == 2) {
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auto number = parts[1].to_uint();
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if (number.has_value()) {
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new_gid = number.value();
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} else {
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auto* group = getgrnam(parts[1].characters());
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if (!group) {
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fprintf(stderr, "Unknown group '%s'\n", parts[1].characters());
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return 1;
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}
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new_gid = group->gr_gid;
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}
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}
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int rc = chown(argv[2], new_uid, new_gid);
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if (rc < 0) {
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perror("chown");
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return 1;
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}
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return 0;
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}
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