Add linux console using stdin/out. Configure the attached terminal for
readline use.
Signed-off-by: Piotr Jaroszyński <p.jaroszyn...@gmail.com>
---
src/Makefile | 2 +-
src/config/config.c | 3 +
src/config/defaults/linux.h | 2 +
src/interface/linux/linux_console.c | 146 +++++++++++++++++++++++++++++++++++
4 files changed, 152 insertions(+), 1 deletions(-)
create mode 100644 src/interface/linux/linux_console.c
diff --git a/src/Makefile b/src/Makefile
index bbd169b..df99680 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -72,7 +72,7 @@ SRCDIRS += drivers/block
SRCDIRS += drivers/nvs
SRCDIRS += drivers/bitbash
SRCDIRS += drivers/infiniband
-SRCDIRS += interface/pxe interface/efi interface/smbios
+SRCDIRS += interface/pxe interface/efi interface/smbios
interface/linux
SRCDIRS += tests
SRCDIRS += crypto crypto/axtls crypto/matrixssl
SRCDIRS += hci hci/commands hci/tui
diff --git a/src/config/config.c b/src/config/config.c
index a6e7622..1803f68 100644
--- a/src/config/config.c
+++ b/src/config/config.c
@@ -82,6 +82,9 @@ REQUIRE_OBJECT ( syslog );
#ifdef CONSOLE_EFI
REQUIRE_OBJECT ( efi_console );
#endif
+#ifdef CONSOLE_LINUX
+REQUIRE_OBJECT ( linux_console );
+#endif
/*
* Drag in all requested network protocols
diff --git a/src/config/defaults/linux.h b/src/config/defaults/linux.h
index fbb2c17..91f85c4 100644
--- a/src/config/defaults/linux.h
+++ b/src/config/defaults/linux.h
@@ -7,6 +7,8 @@
*
*/
+#define CONSOLE_LINUX
+
#define IMAGE_SCRIPT
#endif /* CONFIG_DEFAULTS_LINUX_H */
diff --git a/src/interface/linux/linux_console.c
b/src/interface/linux/linux_console.c
new file mode 100644
index 0000000..6f43860
--- /dev/null
+++ b/src/interface/linux/linux_console.c
@@ -0,0 +1,146 @@
+/*
+ * Copyright (C) 2010 Piotr Jaroszyński <p.jaroszyn...@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+FILE_LICENCE(GPL2_OR_LATER);
+
+/** @file
+ *
+ * Linux console implementation.
+ *
+ */
+
+#include <console.h>
+
+#include <gpxe/init.h>
+#include <gpxe/keys.h>
+#include <linux_api.h>
+
+#include <linux/termios.h>
+#include <asm/errno.h>
+
+static void linux_console_putchar(int c)
+{
+ /* write to stdout */
+ if (linux_write(1, &c, 1) != 1)
+ DBG("linux_console write failed (%s)\n",
linux_strerror(linux_errno));
+}
+
+static int linux_console_getchar()
+{
+ char c;
+
+ /* read from stdin */
+ if (linux_read(0, &c, 1) < 0) {
+ DBG("linux_console read failed (%s)\n",
linux_strerror(linux_errno));
+ return 0;
+ }
+ /* backspace seems to be returned as ascii del, map it here */
+ if (c == 0x7f)
+ return KEY_BACKSPACE;
+ else
+ return c;
+}
+
+static int linux_console_iskey()
+{
+ struct pollfd pfd;
+ pfd.fd = 0;
+ pfd.events = POLLIN;
+
+ /* poll for data to be read on stdin */
+ if (linux_poll(&pfd, 1, 0) == -1) {
+ DBG("linux_console poll failed (%s)\n",
linux_strerror(linux_errno));
+ return 0;
+ }
+
+ if (pfd.revents & POLLIN)
+ return 1;
+ else
+ return 0;
+}
+
+struct console_driver linux_console __console_driver = {
+ .disabled = 0,
+ .putchar = linux_console_putchar,
+ .getchar = linux_console_getchar,
+ .iskey = linux_console_iskey,
+};
+
+static int linux_tcgetattr(int fd, struct termios *termios_p)
+{
+ return linux_ioctl(fd, TCGETS, termios_p);
+}
+
+static int linux_tcsetattr(int fd, int optional_actions, const struct termios
*termios_p)
+{
+ unsigned long int cmd;
+
+ switch (optional_actions)
+ {
+ case TCSANOW:
+ cmd = TCSETS;
+ break;
+ case TCSADRAIN:
+ cmd = TCSETSW;
+ break;
+ case TCSAFLUSH:
+ cmd = TCSETSF;
+ break;
+ default:
+ linux_errno = EINVAL;
+ return -1;
+ }
+
+ return linux_ioctl(fd, cmd, termios_p);
+}
+
+/** Saved termios attributes */
+static struct termios saved_termios;
+
+/** Setup the terminal for our use */
+static void linux_console_startup(void)
+{
+ struct termios t;
+
+ if (linux_tcgetattr(0, &t)) {
+ DBG("linux_console tcgetattr failed (%s)",
linux_strerror(linux_errno));
+ return;
+ }
+
+ saved_termios = t;
+
+ /* Disable canonical mode and echo. Let readline handle that */
+ t.c_lflag &= ~(ECHO | ICANON);
+ /* stop ^C from sending a signal */
+ t.c_cc[VINTR] = 0;
+
+ if (linux_tcsetattr(0, TCSAFLUSH, &t))
+ DBG("linux_console tcsetattr failed (%s)",
linux_strerror(linux_errno));
+}
+
+/** Restores original terminal attributes on shutdown */
+static void linux_console_shutdown(int flags __unused)
+{
+ if (linux_tcsetattr(0, TCSAFLUSH, &saved_termios))
+ DBG("linux_console tcsetattr failed (%s)",
linux_strerror(linux_errno));
+}
+
+struct startup_fn linux_console_startup_fn __startup_fn(STARTUP_EARLY) = {
+ .startup = linux_console_startup,
+ .shutdown = linux_console_shutdown,
+};
--
1.7.1
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