diff -up sudo-1.8.6p7/src/ttyname.c.get_process_ttyname sudo-1.8.6p7/src/ttyname.c
--- sudo-1.8.6p7/src/ttyname.c.get_process_ttyname 2013-02-25 20:46:09.000000000 +0100
+++ sudo-1.8.6p7/src/ttyname.c 2017-05-25 10:23:28.720850944 +0200
@@ -171,6 +171,8 @@ static char *search_devs[] = {
static char *ignore_devs[] = {
"/dev/fd/",
+ "/dev/mqueue/",
+ "/dev/shm/",
"/dev/stdin",
"/dev/stdout",
"/dev/stderr",
@@ -437,9 +439,13 @@ get_process_ttyname(void)
len = getline(&line, &linesize, fp);
fclose(fp);
if (len != -1) {
- /* Field 7 is the tty dev (0 if no tty) */
- char *cp = line;
- int field = 1;
+ /*
+ * Field 7 is the tty dev (0 if no tty).
+ * Since the process name at field 2 "(comm)" may include spaces,
+ * start at the last ')' found.
+ */
+ char *cp = strrchr(line, ')');
+ int field = 2;
while (*cp != '\0') {
if (*cp++ == ' ') {
if (++field == 7) {