1 files changed, 70 insertions, 0 deletions
diff --git a/smtpd/mail.mda.c b/smtpd/mail.mda.c
new file mode 100644
index 00000000..23958071
--- /dev/null
+++ b/smtpd/mail.mda.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2017 Gilles Chehade <gilles@poolp.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "includes.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sysexits.h>
+#include <unistd.h>
+
+int
+main(int argc, char *argv[])
+{
+	int ch;
+	int ret;
+
+	if (! geteuid())
+		errx(1, "mail.mda: may not be executed as root");
+
+	while ((ch = getopt(argc, argv, "")) != -1) {
+		switch (ch) {
+		default:
+			break;
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
+	if (argc == 0)
+		errx(1, "mail.mda: command required");
+
+	if (argc > 1)
+		errx(1, "mail.mda: only one command is supported");
+
+	/* could not obtain a shell or could not obtain wait status,
+	 * tempfail */
+	if ((ret = system(argv[0])) == -1)
+		errx(EX_TEMPFAIL, "%s", strerror(errno));
+
+	/* not exited properly but we have no details,
+	 * tempfail */
+	if (! WIFEXITED(ret))
+		exit(EX_TEMPFAIL);
+
+	exit(WEXITSTATUS(ret));
+}