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-rw-r--r--sysdeps/generic/putenv.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/sysdeps/generic/putenv.c b/sysdeps/generic/putenv.c
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+/* Copyright (C) 1991, 94, 95, 96, 97, 98, 99 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C 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.
+
+ The GNU C 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 the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#if defined _AIX && !defined __GNUC__
+ #pragma alloca
+#endif
+
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#if _LIBC || HAVE_STDLIB_H
+# include <stdlib.h>
+#endif
+#if _LIBC || HAVE_STRING_H
+# include <string.h>
+#endif
+
+#if !__GNU_LIBRARY__ && !HAVE_STRCHR
+# define strchr index
+#endif
+
+#ifndef _LIBC
+# ifdef HAVE_ALLOCA_H
+# include <alloca.h>
+# else
+# ifdef __GNUC__
+# define alloca __builtin_alloca
+# else
+extern char *alloca ();
+# endif /* __GNUC__ */
+# endif /* HAVE_ALLOCA_H */
+#endif /* _LIBC */
+
+
+/* Put STRING, which is of the form "NAME=VALUE", in the environment. */
+int
+putenv (string)
+ char *string;
+{
+ const char *const name_end = strchr (string, '=');
+
+ if (name_end != NULL)
+ {
+#ifdef _LIBC
+ char *name = strndupa (string, name_end - string);
+#else
+ char *name = alloca (name_end - string + 1);
+ memcpy (name, string, name_end - string);
+ name[name_end - string] = '\0';
+#endif
+ return __add_to_environ (name, NULL, string, 1);
+ }
+
+ __unsetenv (string);
+ return 0;
+}