Bionic lacks tcdrain; provide a workaround

Signed-off-by: Matt Whitlock <busybox@mattwhitlock.name>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/libbb/missing_syscalls.c b/libbb/missing_syscalls.c
index dd430e3e2..e3c1e924b 100644
--- a/libbb/missing_syscalls.c
+++ b/libbb/missing_syscalls.c
@@ -39,4 +39,9 @@ int pivot_root(const char *new_root, const char *put_old)
 {
         return syscall(__NR_pivot_root, new_root, put_old);
 }
+
+int tcdrain(int fd)
+{
+        return ioctl(fd, TCSBRK, 1);
+}
 #endif