mirror of
https://github.com/ton-blockchain/ton
synced 2025-03-09 15:40:10 +00:00
68 lines
2 KiB
C++
68 lines
2 KiB
C++
/*
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This file is part of TON Blockchain Library.
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TON Blockchain Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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TON Blockchain Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2017-2020 Telegram Systems LLP
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*/
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#include "td/utils/port/user.h"
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#include "td/utils/port/config.h"
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#if TD_PORT_POSIX
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#include <grp.h>
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#include <pwd.h>
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#if TD_DARWIN || TD_FREEBSD || TD_NETBSD
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#include <sys/param.h>
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#endif
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#include <sys/types.h>
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#include <unistd.h>
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#endif
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namespace td {
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Status change_user(CSlice username, CSlice groupname) {
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#if TD_PORT_POSIX
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passwd *pw = getpwnam(username.c_str());
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if (pw == nullptr) {
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return OS_ERROR(PSTRING() << "Can't find the user '" << username << "' to switch to");
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}
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uid_t uid = pw->pw_uid;
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gid_t gid = pw->pw_gid;
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if (setgroups(1, &gid) == -1) {
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return OS_ERROR("Failed to clear supplementary group list");
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}
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if (!groupname.empty()) {
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group *g = getgrnam(groupname.c_str());
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if (g == nullptr) {
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return OS_ERROR("Can't find the group to switch to");
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}
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gid = g->gr_gid;
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} else if (initgroups(username.c_str(), gid) == -1) {
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return OS_ERROR("Failed to load groups of user");
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}
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if (setgid(gid) == -1) {
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return OS_ERROR("failed to set effective group ID");
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}
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if (setuid(uid) == -1) {
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return OS_ERROR("failed to set effective user ID");
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}
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return Status::OK();
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#else
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return Status::Error("Changing effective user is not supported");
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#endif
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}
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} // namespace td
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