stdlib/secure-getenv.c

   1 /* Copyright (C) 1991-2018 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 <stdlib.h>
  19 #include <unistd.h>
  20
  21 #include <shlib-compat.h>
  22
  23 /* Some programs and especially the libc itself have to be careful
  24    what values to accept from the environment.  This special version
  25    checks for SUID or SGID first before doing any work.  */
  26 char *
  27 __libc_secure_getenv (const char *name)
  28 {
  29   return __libc_enable_secure ? NULL : getenv (name);
  30 }
  31 weak_alias (__libc_secure_getenv, secure_getenv)
  32 libc_hidden_weak (__libc_secure_getenv)
  33
  34 #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_17)
  35 compat_symbol (libc, __libc_secure_getenv, __secure_getenv, GLIBC_2_0);
  36 #endif