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75 lines
1.8 KiB
75 lines
1.8 KiB
// Copyright 2015 The Chromium OS Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "brillo/userdb_utils.h"
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#include <errno.h>
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#include <grp.h>
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#include <pwd.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <vector>
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#include <base/logging.h>
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#include <base/posix/safe_strerror.h>
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namespace brillo {
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namespace userdb {
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bool GetUserInfo(const std::string& user, uid_t* uid, gid_t* gid) {
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ssize_t buf_len = sysconf(_SC_GETPW_R_SIZE_MAX);
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if (buf_len < 0)
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buf_len = 16384; // 16K should be enough?...
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passwd pwd_buf;
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passwd* pwd = nullptr;
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std::vector<char> buf(buf_len);
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int err_num;
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do {
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err_num = getpwnam_r(user.c_str(), &pwd_buf, buf.data(), buf_len, &pwd);
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} while (err_num == EINTR);
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if (!pwd) {
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LOG(ERROR) << "Unable to find user " << user << ": "
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<< (err_num ? base::safe_strerror(err_num)
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: "No matching record");
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return false;
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}
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if (uid)
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*uid = pwd->pw_uid;
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if (gid)
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*gid = pwd->pw_gid;
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return true;
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}
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bool GetGroupInfo(const std::string& group, gid_t* gid) {
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ssize_t buf_len = sysconf(_SC_GETGR_R_SIZE_MAX);
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if (buf_len < 0)
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buf_len = 16384; // 16K should be enough?...
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struct group grp_buf;
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struct group* grp = nullptr;
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std::vector<char> buf(buf_len);
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int err_num;
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do {
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err_num = getgrnam_r(group.c_str(), &grp_buf, buf.data(), buf_len, &grp);
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} while (err_num == EINTR);
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if (!grp) {
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LOG(ERROR) << "Unable to find group " << group << ": "
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<< (err_num ? base::safe_strerror(err_num)
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: "No matching record");
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return false;
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}
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if (gid)
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*gid = grp->gr_gid;
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return true;
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}
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} // namespace userdb
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} // namespace brillo
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