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 "replace.h"
  28 #include <talloc.h>
  29 #include "system/passwd.h"
  30 #include "lib/util/util_pw.h"
  31
  32 struct passwd *tcopy_passwd(TALLOC_CTX *mem_ctx,
  33                             const struct passwd *from)
  34 {
  35         struct passwd *ret;
  36         size_t len = 0;
  37
  38         len += strlen(from->pw_name)+1;
  39         len += strlen(from->pw_passwd)+1;
  40         len += strlen(from->pw_gecos)+1;
  41         len += strlen(from->pw_dir)+1;
  42         len += strlen(from->pw_shell)+1;
  43
  44         ret = talloc_pooled_object(mem_ctx, struct passwd, 5, len);
  45
  46         if (ret == NULL) {
  47                 return NULL;
  48         }
  49
  50         ret->pw_name = talloc_strdup(ret, from->pw_name);
  51         ret->pw_passwd = talloc_strdup(ret, from->pw_passwd);
  52         ret->pw_uid = from->pw_uid;
  53         ret->pw_gid = from->pw_gid;
  54         ret->pw_gecos = talloc_strdup(ret, from->pw_gecos);
  55         ret->pw_dir = talloc_strdup(ret, from->pw_dir);
  56         ret->pw_shell = talloc_strdup(ret, from->pw_shell);
  57
  58         return ret;
  59 }
  60
  61 struct passwd *getpwnam_alloc(TALLOC_CTX *mem_ctx, const char *name)
  62 {
  63         struct passwd *temp;
  64
  65         temp = getpwnam(name);
  66
  67         if (!temp) {
  68 #if 0
  69                 if (errno == ENOMEM) {
  70                         /* what now? */
  71                 }
  72 #endif
  73                 return NULL;
  74         }
  75
  76         return tcopy_passwd(mem_ctx, temp);
  77 }
  78
  79 /****************************************************************************
  80  talloc'ed version of getpwuid.
  81 ****************************************************************************/
  82
  83 struct passwd *getpwuid_alloc(TALLOC_CTX *mem_ctx, uid_t uid)
  84 {
  85         struct passwd *temp;
  86
  87         temp = getpwuid(uid);
  88
  89         if (!temp) {
  90 #if 0
  91                 if (errno == ENOMEM) {
  92                         /* what now? */
  93                 }
  94 #endif
  95                 return NULL;
  96         }
  97
  98         return tcopy_passwd(mem_ctx, temp);
  99 }