Chris Masone | 31ca5a3 | 2015-04-01 10:27:57 -0700 | [diff] [blame] | 1 | // Copyright 2015 The Chromium OS Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "chromeos/userdb_utils.h" |
| 6 | |
| 7 | #include <grp.h> |
| 8 | #include <pwd.h> |
| 9 | #include <sys/types.h> |
| 10 | #include <unistd.h> |
| 11 | |
| 12 | #include <vector> |
| 13 | |
| 14 | #include <base/logging.h> |
| 15 | |
| 16 | namespace chromeos { |
| 17 | namespace userdb { |
| 18 | |
| 19 | bool GetUserInfo(const std::string& user, uid_t* uid, gid_t* gid) { |
| 20 | ssize_t buf_len = sysconf(_SC_GETPW_R_SIZE_MAX); |
| 21 | if (buf_len < 0) |
| 22 | buf_len = 16384; // 16K should be enough?... |
| 23 | passwd pwd_buf; |
| 24 | passwd* pwd = nullptr; |
| 25 | std::vector<char> buf(buf_len); |
| 26 | if (getpwnam_r(user.c_str(), &pwd_buf, buf.data(), buf_len, &pwd) || !pwd) { |
| 27 | PLOG(ERROR) << "Unable to find user " << user; |
| 28 | return false; |
| 29 | } |
| 30 | |
| 31 | if (uid) |
| 32 | *uid = pwd->pw_uid; |
| 33 | if (gid) |
| 34 | *gid = pwd->pw_gid; |
| 35 | return true; |
| 36 | } |
| 37 | |
| 38 | bool GetGroupInfo(const std::string& group, gid_t* gid) { |
| 39 | ssize_t buf_len = sysconf(_SC_GETGR_R_SIZE_MAX); |
| 40 | if (buf_len < 0) |
| 41 | buf_len = 16384; // 16K should be enough?... |
| 42 | struct group grp_buf; |
| 43 | struct group* grp = nullptr; |
| 44 | std::vector<char> buf(buf_len); |
| 45 | if (getgrnam_r(group.c_str(), &grp_buf, buf.data(), buf_len, &grp) || !grp) { |
| 46 | PLOG(ERROR) << "Unable to find group " << group; |
| 47 | return false; |
| 48 | } |
| 49 | |
| 50 | if (gid) |
| 51 | *gid = grp->gr_gid; |
| 52 | return true; |
| 53 | } |
| 54 | |
| 55 | } // namespace userdb |
| 56 | } // namespace chromeos |