diff options
| -rw-r--r-- | support/serial.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/support/serial.c b/support/serial.c index 74c54b0a21c..30542da9dd4 100644 --- a/support/serial.c +++ b/support/serial.c @@ -510,7 +510,15 @@ set_signal (int fd, MonoSerialSignal signal, gboolean value) expected = get_signal_code (signal); if (ioctl (fd, TIOCMGET, &signals) == -1) - return -1; + { + /* Return successfully for pseudo-ttys. + * Linux kernels < 5.13 return EINVAL, + * but versions >=5.13 return ENOTTY. */ + if (errno == EINVAL || errno == ENOTTY) + return 1; + + return -1; + } activated = (signals & expected) != 0; if (activated == value) /* Already set */ |