| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 1991-2015 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 4 | The GNU C Library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU Lesser General Public |
| 6 | License as published by the Free Software Foundation; either |
| 7 | version 2.1 of the License, or (at your option) any later version. |
| 8 | |
| 9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with the GNU C Library; if not, see |
| 16 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include <alloca.h> |
| 19 | #include <errno.h> |
| 20 | #include <stdio.h> |
| 21 | #include <unistd.h> |
| 22 | #include <pwd.h> |
| 23 | |
| 24 | |
| 25 | /* Re-construct the password-file line for the given uid |
| 26 | in the given buffer. This knows the format that the caller |
| 27 | will expect, but this need not be the format of the password file. */ |
| 28 | |
| 29 | int __getpw (__uid_t uid, char *buf); |
| 30 | |
| 31 | int |
| 32 | __getpw (uid, buf) |
| 33 | __uid_t uid; |
| 34 | char *buf; |
| 35 | { |
| 36 | size_t buflen; |
| 37 | char *tmpbuf; |
| 38 | struct passwd resbuf, *p; |
| 39 | |
| 40 | if (buf == NULL) |
| 41 | { |
| 42 | __set_errno (EINVAL); |
| 43 | return -1; |
| 44 | } |
| 45 | |
| 46 | buflen = __sysconf (_SC_GETPW_R_SIZE_MAX); |
| 47 | tmpbuf = alloca (buflen); |
| 48 | |
| 49 | if (__getpwuid_r (uid, &resbuf, tmpbuf, buflen, &p) != 0) |
| 50 | return -1; |
| 51 | |
| 52 | if (p == NULL) |
| 53 | return -1; |
| 54 | |
| 55 | if (sprintf (buf, "%s:%s:%lu:%lu:%s:%s:%s", p->pw_name, p->pw_passwd, |
| 56 | (unsigned long int) p->pw_uid, (unsigned long int) p->pw_gid, |
| 57 | p->pw_gecos, p->pw_dir, p->pw_shell) < 0) |
| 58 | return -1; |
| 59 | |
| 60 | return 0; |
| 61 | } |
| 62 | weak_alias (__getpw, getpw) |
| 63 | |
| 64 | link_warning (getpw, "the `getpw' function is dangerous and should not be used.") |