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-rw-r--r--src/init/stdlib.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/init/stdlib.c b/src/init/stdlib.c
index e8b3f97..839b8f5 100644
--- a/src/init/stdlib.c
+++ b/src/init/stdlib.c
@@ -10,6 +10,8 @@ int printf(const char *fmt, ...) {
int total = 0;
va_list argp;
va_start(argp, fmt);
+ if (__tty_fd < 0) return 0;
+
for (;;) {
char c = *fmt++;
switch (c) {