+/*****************************************************************************
+ * setenv.c: POSIX setenv() & unsetenv() replacement
+ *****************************************************************************
+ * Copyright © 2010 Rémi Denis-Courmont
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+
+int setenv (const char *name, const char *value, int override)
+{
+ if (override == 0 && getenv (name) != NULL)
+ return 0;
+
+ size_t namelen = strlen (name);
+ size_t valuelen = strlen (value);
+ char *var = malloc (namelen + valuelen + 2);
+
+ if (var == NULL)
+ return -1;
+
+ sprintf (var, "%s=%s", name, value);
+ /* This leaks memory. This is unavoidable. */
+ return putenv (var);
+}
+
+int unsetenv (const char *name)
+{
+ return setenv (name, "", 1);
+}