lib/util/util_pw.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Safe versions of getpw* calls
   5
   6    Copyright (C) Andrew Tridgell 1992-1998
   7    Copyright (C) Jeremy Allison  1998-2005
   8    Copyright (C) Andrew Bartlett 2002
   9    Copyright (C) Timur Bakeyev        2005
  10    Copyright (C) Bjoern Jacke    2006-2007
  11
  12
  13    This program is free software; you can redistribute it and/or modify
  14    it under the terms of the GNU General Public License as published by
  15    the Free Software Foundation; either version 3 of the License, or
  16    (at your option) any later version.
  17
  18    This program is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21    GNU General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  25 */
  26
  27 #include "includes.h"
  28 #include "system/passwd.h"
  29 #include "lib/util/util_pw.h"
  30
  31 struct passwd *tcopy_passwd(TALLOC_CTX *mem_ctx,
  32                             const struct passwd *from)
  33 {
  34         struct passwd *ret;
  35         size_t len = 0;
  36
  37         len += strlen(from->pw_name)+1;
  38         len += strlen(from->pw_passwd)+1;
  39         len += strlen(from->pw_gecos)+1;
  40         len += strlen(from->pw_dir)+1;
  41         len += strlen(from->pw_shell)+1;
  42
  43         ret = talloc_pooled_object(mem_ctx, struct passwd, 5, len);
  44
  45         if (ret == NULL) {
  46                 return NULL;
  47         }
  48
  49         ret->pw_name = talloc_strdup(ret, from->pw_name);
  50         ret->pw_passwd = talloc_strdup(ret, from->pw_passwd);
  51         ret->pw_uid = from->pw_uid;
  52         ret->pw_gid = from->pw_gid;
  53         ret->pw_gecos = talloc_strdup(ret, from->pw_gecos);
  54         ret->pw_dir = talloc_strdup(ret, from->pw_dir);
  55         ret->pw_shell = talloc_strdup(ret, from->pw_shell);
  56
  57         return ret;
  58 }
  59
  60 struct passwd *getpwnam_alloc(TALLOC_CTX *mem_ctx, const char *name)
  61 {
  62         struct passwd *temp;
  63
  64         temp = getpwnam(name);
  65
  66         if (!temp) {
  67 #if 0
  68                 if (errno == ENOMEM) {
  69                         /* what now? */
  70                 }
  71 #endif
  72                 return NULL;
  73         }
  74
  75         return tcopy_passwd(mem_ctx, temp);
  76 }
  77
  78 /****************************************************************************
  79  talloc'ed version of getpwuid.
  80 ****************************************************************************/
  81
  82 struct passwd *getpwuid_alloc(TALLOC_CTX *mem_ctx, uid_t uid)
  83 {
  84         struct passwd *temp;
  85
  86         temp = getpwuid(uid);
  87
  88         if (!temp) {
  89 #if 0
  90                 if (errno == ENOMEM) {
  91                         /* what now? */
  92                 }
  93 #endif
  94                 return NULL;
  95         }
  96
  97         return tcopy_passwd(mem_ctx, temp);
  98 }