Added autodetection of available baud rates

Various platforms supports different baud rates.

To avoid adding platform specific handling generic baud rate detection
tests are introduced in the configure script. Successfully detected baud
rates are automatically enabled. This applies to both the C code and the
bash completion script.

Note:
Baud rates below 57600 are defined by POSIX-1 and supported by most
platforms so only baud rate 57600 and above are tested.

.gitignore

@@ -21,3 +21,4 @@ src/include/config.h.in~
 src/include/stamp-h1
 *.swp
 /tio-*
+/src/bash-completion/tio

configure.ac

@@ -25,6 +25,23 @@ fi
 AC_SUBST([BASH_COMPLETION_DIR])
 AM_CONDITIONAL([ENABLE_BASH_COMPLETION],[test "x$with_bash_completion_dir" != "xno"])
 
+# Check for available terminal I/O speeds
+AC_CHECK_DECL([B57600], [AC_SUBST([B57600],["57600"])], [], [[#include <termios.h>]])
+AC_CHECK_DECL([B115200], [AC_SUBST([B115200],["115200"])], [], [[#include <termios.h>]])
+AC_CHECK_DECL([B230400], [AC_SUBST([B230400],["230400"])], [], [[#include <termios.h>]])
+AC_CHECK_DECL([B460800], [AC_SUBST([B460800],["460800"])], [], [[#include <termios.h>]])
+AC_CHECK_DECL([B500000], [AC_SUBST([B500000],["500000"])], [], [[#include <termios.h>]])
+AC_CHECK_DECL([B576000], [AC_SUBST([B576000],["576000"])], [], [[#include <termios.h>]])
+AC_CHECK_DECL([B921600], [AC_SUBST([B921600],["921600"])], [], [[#include <termios.h>]])
+AC_CHECK_DECL([B1000000], [AC_SUBST([B1000000],["1000000"])], [], [[#include <termios.h>]])
+AC_CHECK_DECL([B1152000], [AC_SUBST([B1152000],["1152000"])], [], [[#include <termios.h>]])
+AC_CHECK_DECL([B1500000], [AC_SUBST([B1500000],["1500000"])], [], [[#include <termios.h>]])
+AC_CHECK_DECL([B2000000], [AC_SUBST([B2000000],["2000000"])], [], [[#include <termios.h>]])
+AC_CHECK_DECL([B2500000], [AC_SUBST([B2500000],["2500000"])], [], [[#include <termios.h>]])
+AC_CHECK_DECL([B3000000], [AC_SUBST([B3000000],["3000000"])], [], [[#include <termios.h>]])
+AC_CHECK_DECL([B3500000], [AC_SUBST([B3500000],["3500000"])], [], [[#include <termios.h>]])
+AC_CHECK_DECL([B4000000], [AC_SUBST([B4000000],["4000000"])], [], [[#include <termios.h>]])
+
 AC_CONFIG_FILES([Makefile])
 AC_CONFIG_FILES([src/Makefile])
 AC_CONFIG_FILES([man/Makefile])

src/Makefile.am

@@ -14,6 +14,28 @@ tio_SOURCES = tty.c \
               include/tio/error.h
 
 if ENABLE_BASH_COMPLETION
+CLEANFILES = bash-completion/tio
+
+do_subst = sed -e 's/57600 /$(B57600) /g' \
+               -e 's/115200 /$(B115200) /g' \
+               -e 's/230400 /$(B230400) /g' \
+               -e 's/460800 /$(B460800) /g' \
+               -e 's/500000 /$(B500000) /g' \
+               -e 's/576000 /$(B576000) /g' \
+               -e 's/921600 /$(B921600) /g' \
+               -e 's/1000000 /$(B1000000) /g' \
+               -e 's/1152000 /$(B1152000) /g' \
+               -e 's/1500000 /$(B1500000) /g' \
+               -e 's/2000000 /$(B2000000) /g' \
+               -e 's/2500000 /$(B2500000) /g' \
+               -e 's/3000000 /$(B3000000) /g' \
+               -e 's/3500000 /$(B3500000) /g' \
+               -e 's/4000000/$(B4000000)/g'
+
+bash-completion/tio: bash-completion/tio.in
+	$(do_subst) < bash-completion/tio.in > bash-completion/tio
+
 bashcompletiondir=@BASH_COMPLETION_DIR@
 dist_bashcompletion_DATA=bash-completion/tio
+
 endif

src/tty.c

@@ -211,51 +211,81 @@ void tty_configure(void)
         case 38400:
             baudrate = B38400;
             break;
+#ifdef HAVE_DECL_B57600
         case 57600:
             baudrate = B57600;
             break;
+#endif
+#ifdef HAVE_DECL_B115200
         case 115200:
             baudrate = B115200;
             break;
+#endif
+#ifdef HAVE_DECL_B230400
         case 230400:
             baudrate = B230400;
             break;
+#endif
+#ifdef HAVE_DECL_B460800
         case 460800:
             baudrate = B460800;
             break;
+#endif
+#ifdef HAVE_DECL_B500000
         case 500000:
             baudrate = B500000;
             break;
+#endif
+#ifdef HAVE_DECL_B576000
         case 576000:
             baudrate = B576000;
             break;
+#endif
+#ifdef HAVE_DECL_B921600
         case 921600:
             baudrate = B921600;
             break;
+#endif
+#ifdef HAVE_DECL_B1000000
         case 1000000:
             baudrate = B1000000;
             break;
+#endif
+#ifdef HAVE_DECL_B1152000
         case 1152000:
             baudrate = B1152000;
             break;
+#endif
+#ifdef HAVE_DECL_B1500000
         case 1500000:
             baudrate = B1500000;
             break;
+#endif
+#ifdef HAVE_DECL_B2000000
         case 2000000:
             baudrate = B2000000;
             break;
+#endif
+#ifdef HAVE_DECL_B2500000
         case 2500000:
             baudrate = B2500000;
             break;
+#endif
+#ifdef HAVE_DECL_B3000000
         case 3000000:
             baudrate = B3000000;
             break;
+#endif
+#ifdef HAVE_DECL_B3500000
         case 3500000:
             baudrate = B3500000;
             break;
+#endif
+#ifdef HAVE_DECL_B4000000
         case 4000000:
             baudrate = B4000000;
             break;
+#endif
         default:
             error_printf("Invalid baud rate");
             exit(EXIT_FAILURE);