diff options
Diffstat (limited to 'src/main/native/flow.c')
| -rw-r--r-- | src/main/native/flow.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/main/native/flow.c b/src/main/native/flow.c index c8927e9..8cb7def 100644 --- a/src/main/native/flow.c +++ b/src/main/native/flow.c @@ -51,9 +51,11 @@ int serial_open(const char* port_name, int baud, struct serial_config** serial) int fd = open(port_name, O_RDWR | O_NOCTTY | O_NONBLOCK); if (fd < 0) { + int en = errno; DEBUG(perror("obtain file descriptor");); - if (errno == EACCES) return E_ACCESS_DENIED; - else return E_IO; + if (en == EACCES) return E_ACCESS_DENIED; + if (en == ENOENT) return E_NO_PORT; + return E_IO; } if (flock(fd, LOCK_EX | LOCK_NB) < 0) { |