1 files changed, 90 insertions, 0 deletions
diff --git a/usr.bin/mail/v7.local.c b/usr.bin/mail/v7.local.c
new file mode 100644
index 000000000000..6390b4235ace
--- /dev/null
+++ b/usr.bin/mail/v7.local.c
@@ -0,0 +1,90 @@
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 1980, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Mail -- a mail program
+ *
+ * Version 7
+ *
+ * Local routines that are installation dependent.
+ */
+
+#include "rcv.h"
+#include <fcntl.h>
+#include "extern.h"
+
+/*
+ * Locate the user's mailbox file (ie, the place where new, unread
+ * mail is queued).
+ */
+void
+findmail(char *user, char *buf, int buflen)
+{
+	char *tmp = getenv("MAIL");
+
+	if (tmp == NULL)
+		(void)snprintf(buf, buflen, "%s/%s", _PATH_MAILDIR, user);
+	else
+		(void)strlcpy(buf, tmp, buflen);
+}
+
+/*
+ * Get rid of the queued mail.
+ */
+void
+demail(void)
+{
+	int fd;
+
+	if (value("keep") != NULL || rm(mailname) < 0)
+		if ((fd = open(mailname, O_CREAT | O_TRUNC | O_WRONLY, 0600)) >=
+		    0)
+			(void)close(fd);
+}
+
+/*
+ * Discover user login name.
+ */
+char *
+username(void)
+{
+	char *np;
+	uid_t uid;
+
+	if ((np = getenv("USER")) != NULL)
+		return (np);
+	if ((np = getenv("LOGNAME")) != NULL)
+		return (np);
+	if ((np = getname(uid = getuid())) != NULL)
+		return (np);
+	printf("Cannot associate a name with uid %u\n", (unsigned)uid);
+	return (NULL);
+}