| /* Copyright (C) 1991-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <alloca.h> |
| #include <errno.h> |
| #include <stdio.h> |
| #include <unistd.h> |
| #include <pwd.h> |
| |
| |
| /* Re-construct the password-file line for the given uid |
| in the given buffer. This knows the format that the caller |
| will expect, but this need not be the format of the password file. */ |
| |
| int __getpw (__uid_t uid, char *buf); |
| |
| int |
| __getpw (__uid_t uid, char *buf) |
| { |
| size_t buflen; |
| char *tmpbuf; |
| struct passwd resbuf, *p; |
| |
| if (buf == NULL) |
| { |
| __set_errno (EINVAL); |
| return -1; |
| } |
| |
| buflen = __sysconf (_SC_GETPW_R_SIZE_MAX); |
| tmpbuf = alloca (buflen); |
| |
| if (__getpwuid_r (uid, &resbuf, tmpbuf, buflen, &p) != 0) |
| return -1; |
| |
| if (p == NULL) |
| return -1; |
| |
| if (sprintf (buf, "%s:%s:%lu:%lu:%s:%s:%s", p->pw_name, p->pw_passwd, |
| (unsigned long int) p->pw_uid, (unsigned long int) p->pw_gid, |
| p->pw_gecos, p->pw_dir, p->pw_shell) < 0) |
| return -1; |
| |
| return 0; |
| } |
| weak_alias (__getpw, getpw) |
| |
| link_warning (getpw, "the `getpw' function is dangerous and should not be used.") |