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-rw-r--r--shell/cttyhack.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/shell/cttyhack.c b/shell/cttyhack.c
index 4261289b4..37ea13723 100644
--- a/shell/cttyhack.c
+++ b/shell/cttyhack.c
@@ -122,10 +122,12 @@ int cttyhack_main(int argc UNUSED_PARAM, char **argv)
do {
#ifdef __linux__
int s = open_read_close("/sys/class/tty/console/active",
- console + 5, sizeof(console) - 5 - 1);
+ console + 5, sizeof(console) - 5);
if (s > 0) {
- /* found active console via sysfs (Linux 2.6.38+) */
- console[5 + s] = '\0';
+ /* found active console via sysfs (Linux 2.6.38+)
+ * sysfs string looks like "ttyS0\n" so zap the newline:
+ */
+ console[4 + s] = '\0';
break;
}