1 files changed, 39 insertions, 0 deletions
diff --git a/lib/compat/unsetenv.c b/lib/compat/unsetenv.c
new file mode 100644
index 0000000..4094ae3
--- /dev/null
+++ b/lib/compat/unsetenv.c
@@ -0,0 +1,39 @@
+/*
+ * libcompat - system compatibility library
+ *
+ * Copyright © 1995 Ian Jackson <ijackson@chiark.greenend.org.uk>
+ *
+ * This 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 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, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+
+#include <string.h>
+#include <stdlib.h>
+
+#include "compat.h"
+
+int
+unsetenv(const char *p)
+{
+	char *q;
+
+	q = malloc(strlen(p) + 3);
+	if (!q)
+		return -1;
+
+	strcpy(q, p);
+	strcat(q, "=");
+	return putenv(q);
+}