Only support toggle RTS command in Linux; fix a few spelling errors and typos in man page.

picocom.1.md

@@ -62,7 +62,7 @@ here.
 
 **C-q**
 
-:   Quit the program _without_ reseting the serial port, regardless of
+:   Quit the program _without_ resetting the serial port, regardless of
     the **--noreset** option.
 
 **C-p**
@@ -78,6 +78,7 @@ here.
 
 :   Toggle the RTS line. If RTS is up, then lower it. If it is down,
     then raise it. Not supported if the flow control mode is RTS/CTS.
+    Only supported in Linux.
 
 **C-backslash**
 
@@ -300,7 +301,7 @@ the same, only a single value is shown. Example:
 
     *** baud: 9600
 
-This behavioir was intriduced in picocom 2.0. Older releases displayed
+This behavior was introduced in picocom 2.0. Older releases displayed
 only the option values, not the actual serial-port settings
 corresponding to them.
 
@@ -321,7 +322,7 @@ programs for this purpose are:
     
 The name of, and the command-line options to, the program to be used
 for transmitting files are given by the **--send-cmd**
-option. Similarly the program to receive files, and its argumets, are
+option. Similarly the program to receive files, and its arguments, are
 given by the **--receive-cmd** option. For example, in order to start
 a picocom session that uses **sz(1)** to transmit files, and **rz(1)**
 to receive files, you have to say something like this:
@@ -348,7 +349,7 @@ with support for the linenoise library. Pressing **C-c** at this
 prompt will cancel the file transfer command and return to normal
 picocom operation. After entering a filename (and / or additional
 transmission or reception program arguments) and assuming you have not
-canceled the operation by pressing **C-c**, picocom will start the the
+canceled the operation by pressing **C-c**, picocom will start the
 external program as specified by the **--send-cmd**, or
 **--receive-cmd** option, and with any filenames and additional
 arguments you may have supplied. The standard input and output of the
@@ -365,7 +366,7 @@ the serial port.
 # INPUT, OUTPUT, AND ECHO MAPPING
 
 Using the **--imap**, **--omap**, and **--emap** options you can make
-picocom map (tranlate, replace) certain special characters after being
+picocom map (translate, replace) certain special characters after being
 read from the serial port (with **--imap**), before being written to
 the serial port (with **--omap**), and before being locally echoed to
 the terminal (standard output) if local echo is enabled (with
@@ -387,7 +388,7 @@ For example the command:
 
 will: 
 
-- Replace every CR (carriage return, 0x0d) caracter with LF (line
+- Replace every CR (carriage return, 0x0d) character with LF (line
   feed, 0x0a) and every DEL (delete, 0x7f) character with BS
   (backspace, 0x08) before writing it to the serial port.
 

term.c

@@ -1446,7 +1446,7 @@ term_lower_dtr(int fd)
 int
 term_raise_rts(int fd)
 {
-	int rval, r, i;
+	int rval, i;
 
 	rval = 0;
 
@@ -1460,6 +1460,7 @@ term_raise_rts(int fd)
 
 #ifdef __linux__
 		{
+			int r;
 			int opins = TIOCM_RTS;
 
 			r = ioctl(fd, TIOCMBIS, &opins);
@@ -1470,13 +1471,8 @@ term_raise_rts(int fd)
 			}
 		}
 #else
-		r = tcsetattr(fd, TCSANOW, &term.currtermios[i]);
-		if ( r < 0 ) {
-			/* FIXME: perhaps try to update currtermios */
-			term_errno = TERM_ESETATTR;
-			rval = -1;
-			break;
-		}
+		term_errno = TERM_ERTSUP;
+		rval = -1;
 #endif /* of __linux__ */
 	} while (0);
 
@@ -1488,7 +1484,7 @@ term_raise_rts(int fd)
 int
 term_lower_rts(int fd)
 {
-	int rval, r, i;
+	int rval, i;
 
 	rval = 0;
 
@@ -1502,6 +1498,7 @@ term_lower_rts(int fd)
 
 #ifdef __linux__
 		{
+			int r;
 			int opins = TIOCM_RTS;
 
 			r = ioctl(fd, TIOCMBIC, &opins);
@@ -1512,27 +1509,8 @@ term_lower_rts(int fd)
 			}
 		}
 #else
-		{
-			struct termios tio;
-
-			r = tcgetattr(fd, &tio);
-			if ( r < 0 ) {
-				term_errno = TERM_EGETATTR;
-				rval = -1;
-				break;
-			}
-			term.currtermios[i] = tio;
-			
-			cfsetospeed(&tio, B0);
-			cfsetispeed(&tio, B0);
-			
-			r = tcsetattr(fd, TCSANOW, &tio);
-			if ( r < 0 ) {
-				term_errno = TERM_ESETATTR;
-				rval = -1;
-				break;
-			}
-		}
+		term_errno = TERM_ERTSDOWN;
+		rval = -1;
 #endif /* of __linux__ */
 	} while (0);