dlls/msvcrt/environ.c

   1 /*
   2  * msvcrt.dll environment functions
   3  *
   4  * Copyright 1996,1998 Marcus Meissner
   5  * Copyright 1996 Jukka Iivonen
   6  * Copyright 1997,2000 Uwe Bonnes
   7  * Copyright 2000 Jon Griffiths
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  */
  23 #include "wine/unicode.h"
  24 #include "msvcrt.h"
  25
  26 #include "msvcrt/stdlib.h"
  27
  28
  29 #include "wine/debug.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
  32
  33 /*********************************************************************
  34  *              getenv (MSVCRT.@)
  35  */
  36 char *MSVCRT_getenv(const char *name)
  37 {
  38   char *environ = GetEnvironmentStringsA();
  39   char *pp,*pos = NULL;
  40   unsigned int length=strlen(name);
  41
  42   for (pp = environ; (*pp); pp = pp + strlen(pp) +1)
  43   {
  44       pos =strchr(pp,'=');
  45       if ((pos) && ((pos - pp) == length))
  46       {
  47           if (!strncasecmp(pp,name,length)) break;
  48       }
  49   }
  50   if ((*pp)&& (pos))
  51   {
  52      pp = pos+1;
  53      TRACE("got %s\n",pp);
  54   }
  55   else
  56     pp = 0;
  57   FreeEnvironmentStringsA( environ );
  58   return pp;
  59 }
  60
  61 /*********************************************************************
  62  *              _wgetenv (MSVCRT.@)
  63  */
  64 MSVCRT_wchar_t *_wgetenv(const MSVCRT_wchar_t *name)
  65 {
  66   MSVCRT_wchar_t* environ = GetEnvironmentStringsW();
  67   MSVCRT_wchar_t* pp,*pos = NULL;
  68   unsigned int length=strlenW(name);
  69
  70   for (pp = environ; (*pp); pp = pp + strlenW(pp) + 1)
  71   {
  72       pos = strchrW(pp,'=');
  73       if ((pos) && ((pos - pp) == length))
  74       {
  75           if (!strncmpiW(pp,name,length))
  76           {
  77               pp = pos+1;
  78               TRACE("got %s\n",debugstr_w(pp));
  79               /* can't free pointer since we are returning it */
  80               /* should probably use MSVCRT_wenviron instead */
  81               FIXME( "memory leak\n" );
  82               return pp;
  83           }
  84       }
  85   }
  86   FreeEnvironmentStringsW( environ );
  87   return NULL;
  88 }
  89
  90 /*********************************************************************
  91  *              _putenv (MSVCRT.@)
  92  */
  93 int _putenv(const char *str)
  94 {
  95  char name[256], value[512];
  96  char *dst = name;
  97  int ret;
  98
  99  TRACE("%s\n", str);
 100
 101  if (!str)
 102    return -1;
 103  while (*str && *str != '=')
 104   *dst++ = *str++;
 105  if (!*str++)
 106    return -1;
 107  *dst = '\0';
 108  dst = value;
 109  while (*str)
 110   *dst++ = *str++;
 111  *dst = '\0';
 112
 113  ret = !SetEnvironmentVariableA(name, value[0] ? value : NULL);
 114  /* Update the __p__environ array only when already initialized */
 115  if (MSVCRT__environ)
 116    MSVCRT__environ = msvcrt_SnapshotOfEnvironmentA(MSVCRT__environ);
 117  if (MSVCRT__wenviron)
 118    MSVCRT__wenviron = msvcrt_SnapshotOfEnvironmentW(MSVCRT__wenviron);
 119  return ret;
 120 }
 121
 122 /*********************************************************************
 123  *              _wputenv (MSVCRT.@)
 124  */
 125 int _wputenv(const MSVCRT_wchar_t *str)
 126 {
 127  MSVCRT_wchar_t name[256], value[512];
 128  MSVCRT_wchar_t *dst = name;
 129  int ret;
 130
 131  TRACE("%s\n", debugstr_w(str));
 132
 133  if (!str)
 134    return -1;
 135  while (*str && *str != '=')
 136   *dst++ = *str++;
 137  if (!*str++)
 138    return -1;
 139  *dst = 0;
 140  dst = value;
 141  while (*str)
 142   *dst++ = *str++;
 143  *dst = 0;
 144
 145  ret = !SetEnvironmentVariableW(name, value[0] ? value : NULL);
 146  /* Update the __p__environ array only when already initialized */
 147  if (MSVCRT__environ)
 148    MSVCRT__environ = msvcrt_SnapshotOfEnvironmentA(MSVCRT__environ);
 149  if (MSVCRT__wenviron)
 150    MSVCRT__wenviron = msvcrt_SnapshotOfEnvironmentW(MSVCRT__wenviron);
 151  return ret;
 152 }