wine/dlls/msvcrt/environ.c
2009-10-05 14:55:09 +02:00

163 lines
4.3 KiB
C

/*
* msvcrt.dll environment functions
*
* Copyright 1996,1998 Marcus Meissner
* Copyright 1996 Jukka Iivonen
* Copyright 1997,2000 Uwe Bonnes
* Copyright 2000 Jon Griffiths
*
* This 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.
*
* This 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "wine/unicode.h"
#include "msvcrt.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
/*********************************************************************
* getenv (MSVCRT.@)
*/
char * CDECL MSVCRT_getenv(const char *name)
{
char **environ;
unsigned int length=strlen(name);
for (environ = *__p__environ(); *environ; environ++)
{
char *str = *environ;
char *pos = strchr(str,'=');
if (pos && ((pos - str) == length) && !strncasecmp(str,name,length))
{
TRACE("(%s): got %s\n", debugstr_a(name), debugstr_a(pos + 1));
return pos + 1;
}
}
return NULL;
}
/*********************************************************************
* _wgetenv (MSVCRT.@)
*/
MSVCRT_wchar_t * CDECL _wgetenv(const MSVCRT_wchar_t *name)
{
MSVCRT_wchar_t **environ;
unsigned int length=strlenW(name);
for (environ = *__p__wenviron(); *environ; environ++)
{
MSVCRT_wchar_t *str = *environ;
MSVCRT_wchar_t *pos = strchrW(str,'=');
if (pos && ((pos - str) == length) && !strncmpiW(str,name,length))
{
TRACE("(%s): got %s\n", debugstr_w(name), debugstr_w(pos + 1));
return pos + 1;
}
}
return NULL;
}
/*********************************************************************
* _putenv (MSVCRT.@)
*/
int CDECL _putenv(const char *str)
{
char *name, *value;
char *dst;
int ret;
TRACE("%s\n", debugstr_a(str));
if (!str)
return -1;
name = HeapAlloc(GetProcessHeap(), 0, strlen(str) + 1);
if (!name)
return -1;
dst = name;
while (*str && *str != '=')
*dst++ = *str++;
if (!*str++)
{
ret = -1;
goto finish;
}
*dst++ = '\0';
value = dst;
while (*str)
*dst++ = *str++;
*dst = '\0';
ret = SetEnvironmentVariableA(name, value[0] ? value : NULL) ? 0 : -1;
/* _putenv returns success on deletion of nonexistent variable, unlike [Rtl]SetEnvironmentVariable */
if ((ret == -1) && (GetLastError() == ERROR_ENVVAR_NOT_FOUND)) ret = 0;
/* Update the __p__environ array only when already initialized */
if (MSVCRT__environ)
MSVCRT__environ = msvcrt_SnapshotOfEnvironmentA(MSVCRT__environ);
if (MSVCRT__wenviron)
MSVCRT__wenviron = msvcrt_SnapshotOfEnvironmentW(MSVCRT__wenviron);
finish:
HeapFree(GetProcessHeap(), 0, name);
return ret;
}
/*********************************************************************
* _wputenv (MSVCRT.@)
*/
int CDECL _wputenv(const MSVCRT_wchar_t *str)
{
MSVCRT_wchar_t *name, *value;
MSVCRT_wchar_t *dst;
int ret;
TRACE("%s\n", debugstr_w(str));
if (!str)
return -1;
name = HeapAlloc(GetProcessHeap(), 0, (strlenW(str) + 1) * sizeof(MSVCRT_wchar_t));
if (!name)
return -1;
dst = name;
while (*str && *str != '=')
*dst++ = *str++;
if (!*str++)
{
ret = -1;
goto finish;
}
*dst++ = 0;
value = dst;
while (*str)
*dst++ = *str++;
*dst = 0;
ret = SetEnvironmentVariableW(name, value[0] ? value : NULL) ? 0 : -1;
/* _putenv returns success on deletion of nonexistent variable, unlike [Rtl]SetEnvironmentVariable */
if ((ret == -1) && (GetLastError() == ERROR_ENVVAR_NOT_FOUND)) ret = 0;
/* Update the __p__environ array only when already initialized */
if (MSVCRT__environ)
MSVCRT__environ = msvcrt_SnapshotOfEnvironmentA(MSVCRT__environ);
if (MSVCRT__wenviron)
MSVCRT__wenviron = msvcrt_SnapshotOfEnvironmentW(MSVCRT__wenviron);
finish:
HeapFree(GetProcessHeap(), 0, name);
return ret;
}