| 1 | /* Copyright (C) 1991, 1994, 1995, 1996 Free Software Foundation, Inc. |
| 2 | This file based on putenv.c in 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 Library General Public License as |
| 6 | published by the Free Software Foundation; either version 2 of the |
| 7 | 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 | Library General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Library General Public |
| 15 | License along with the GNU C Library; see the file COPYING.LIB. If not, |
| 16 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 17 | Boston, MA 02111-1307, USA. */ |
| 18 | |
| 19 | #if defined (_AIX) && !defined (__GNUC__) |
| 20 | #pragma alloca |
| 21 | #endif |
| 22 | |
| 23 | #if HAVE_CONFIG_H |
| 24 | # include <config.h> |
| 25 | #endif |
| 26 | |
| 27 | #include "ansidecl.h" |
| 28 | |
| 29 | #if HAVE_STDLIB_H |
| 30 | # include <stdlib.h> |
| 31 | #endif |
| 32 | #if HAVE_STRING_H |
| 33 | # include <string.h> |
| 34 | #endif |
| 35 | |
| 36 | #ifdef HAVE_ALLOCA_H |
| 37 | # include <alloca.h> |
| 38 | #else |
| 39 | # ifndef alloca |
| 40 | # ifdef __GNUC__ |
| 41 | # define alloca __builtin_alloca |
| 42 | # else |
| 43 | extern char *alloca (); |
| 44 | # endif /* __GNUC__ */ |
| 45 | # endif /* alloca */ |
| 46 | #endif /* HAVE_ALLOCA_H */ |
| 47 | |
| 48 | /* Below this point, it's verbatim code from the glibc-2.0 implementation */ |
| 49 | |
| 50 | |
| 51 | /* Put STRING, which is of the form "NAME=VALUE", in the environment. */ |
| 52 | int |
| 53 | putenv (string) |
| 54 | const char *string; |
| 55 | { |
| 56 | const char *const name_end = strchr (string, '='); |
| 57 | |
| 58 | if (name_end) |
| 59 | { |
| 60 | char *name = (char *) alloca (name_end - string + 1); |
| 61 | memcpy (name, string, name_end - string); |
| 62 | name[name_end - string] = '\0'; |
| 63 | return setenv (name, name_end + 1, 1); |
| 64 | } |
| 65 | |
| 66 | unsetenv (string); |
| 67 | return 0; |
| 68 | } |