PERFORCE change 97037 for review

[Marcel Moolenaar]

http://perforce.freebsd.org/chv.cgi?CH=97037

Change 97037 by marcel at marcel_nfs on 2006/05/12 23:29:24

	Allow setting the line speed on the command line and
	bail out if tcsetattr() fails.

Affected files ...

.. //depot/projects/uart/dev/uart/uarttest.c#6 edit

Differences ...

==== //depot/projects/uart/dev/uart/uarttest.c#6 (text+ko) ====

@@ -155,9 +155,11 @@
 {
 	char buf[PATH_MAX];
 	struct termios t0, t1;
+	speed_t sp;
 	int ch;
 
-	while ((ch = getopt(argc, argv, "clt")) != -1) {
+	sp = 9600;	/* Any speed that we expect to work for all UARTs */
+	while ((ch = getopt(argc, argv, "cls:t")) != -1) {
 		switch (ch) {
 		case 'c':	/* DCE mode */
 			sethow(AS_DCE);
@@ -165,6 +167,9 @@
 		case 'l':	/* Loopback mode */
 			sethow(AS_LOOP);
 			break;
+		case 's':	/* Line speed */
+			sp = atoi(optarg);
+			break;
 		case 't':	/* DTE mode */
 			sethow(AS_DTE);
 			break;
@@ -198,7 +203,7 @@
 	tcgetattr(fd, &t0);
 	t1 = t0;
 	cfmakeraw(&t1);
-	cfsetspeed(&t1, B115200);
+	cfsetspeed(&t1, sp);
 	switch (how) {
 	case AS_DCE:
 		t1.c_cflag |= CRTS_IFLOW;
@@ -210,7 +215,10 @@
 		t1.c_cflag |= CCTS_OFLOW | CRTS_IFLOW;
 		break;
 	}
-	tcsetattr(fd, TCSAFLUSH|TCSANOW, &t1);
+	if (tcsetattr(fd, TCSAFLUSH|TCSANOW, &t1) == -1)
+		err(EX_IOERR, "cannot set line attributes");
+
+	printf("Line speed is %u baud\n", sp);
 
 	switch (how) {
 	case AS_DCE: