Bug fix: check file descriptor after opening serial device.

2010-08-13 19:08:27 +12:00 · 2010-08-13 19:08:27 +12:00 · a59d1dc73b
parent 9a4ef8a909
commit a59d1dc73b
1 changed files with 3 additions and 0 deletions
--- a/util.c
+++ b/util.c
@ -113,6 +113,9 @@ int open_serial(const char *device, int rate)
 	int fd = open(device, O_RDWR | O_NOCTTY);
 	struct termios attr;

+	if (fd < 0)
+		return -1;
+
 	tcgetattr(fd, &attr);
 	cfmakeraw(&attr);
 	cfsetispeed(&attr, rate);