1 files changed, 225 insertions, 0 deletions
diff --git a/arch/um/drivers/xterm.c b/arch/um/drivers/xterm.c
new file mode 100644
index 00000000000..93dc1911363
--- /dev/null
+++ b/arch/um/drivers/xterm.c
@@ -0,0 +1,225 @@
+/* 
+ * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <termios.h>
+#include <signal.h>
+#include <sched.h>
+#include <sys/socket.h>
+#include "kern_util.h"
+#include "chan_user.h"
+#include "helper.h"
+#include "user_util.h"
+#include "user.h"
+#include "os.h"
+#include "xterm.h"
+
+struct xterm_chan {
+	int pid;
+	int helper_pid;
+	char *title;
+	int device;
+	int raw;
+	struct termios tt;
+	unsigned long stack;
+	int direct_rcv;
+};
+
+/* Not static because it's called directly by the tt mode gdb code */
+void *xterm_init(char *str, int device, struct chan_opts *opts)
+{
+	struct xterm_chan *data;
+
+	data = malloc(sizeof(*data));
+	if(data == NULL) return(NULL);
+	*data = ((struct xterm_chan) { .pid 		= -1, 
+				       .helper_pid 	= -1,
+				       .device 		= device, 
+				       .title 		= opts->xterm_title,
+				       .raw  		= opts->raw,
+				       .stack 		= opts->tramp_stack,
+				       .direct_rcv 	= !opts->in_kernel } );
+	return(data);
+}
+
+/* Only changed by xterm_setup, which is a setup */
+static char *terminal_emulator = "xterm";
+static char *title_switch = "-T";
+static char *exec_switch = "-e";
+
+static int __init xterm_setup(char *line, int *add)
+{
+	*add = 0;
+	terminal_emulator = line;
+
+	line = strchr(line, ',');
+	if(line == NULL) return(0);
+	*line++ = '\0';
+	if(*line) title_switch = line;
+
+	line = strchr(line, ',');
+	if(line == NULL) return(0);
+	*line++ = '\0';
+	if(*line) exec_switch = line;
+
+	return(0);
+}
+
+__uml_setup("xterm=", xterm_setup,
+"xterm=<terminal emulator>,<title switch>,<exec switch>\n"
+"    Specifies an alternate terminal emulator to use for the debugger,\n"
+"    consoles, and serial lines when they are attached to the xterm channel.\n"
+"    The values are the terminal emulator binary, the switch it uses to set\n"
+"    its title, and the switch it uses to execute a subprocess,\n"
+"    respectively.  The title switch must have the form '<switch> title',\n"
+"    not '<switch>=title'.  Similarly, the exec switch must have the form\n"
+"    '<switch> command arg1 arg2 ...'.\n"
+"    The default values are 'xterm=xterm,-T,-e'.  Values for gnome-terminal\n"
+"    are 'xterm=gnome-terminal,-t,-x'.\n\n"
+);
+
+/* XXX This badly needs some cleaning up in the error paths
+ * Not static because it's called directly by the tt mode gdb code
+ */
+int xterm_open(int input, int output, int primary, void *d,
+		      char **dev_out)
+{
+	struct xterm_chan *data = d;
+	unsigned long stack;
+	int pid, fd, new, err;
+	char title[256], file[] = "/tmp/xterm-pipeXXXXXX";
+	char *argv[] = { terminal_emulator, title_switch, title, exec_switch, 
+			 "/usr/lib/uml/port-helper", "-uml-socket",
+			 file, NULL };
+
+	if(os_access(argv[4], OS_ACC_X_OK) < 0)
+		argv[4] = "port-helper";
+
+	/* Check that DISPLAY is set, this doesn't guarantee the xterm
+	 * will work but w/o it we can be pretty sure it won't. */
+	if (!getenv("DISPLAY")) {
+		printk("xterm_open: $DISPLAY not set.\n");
+		return -ENODEV;
+	}
+
+	fd = mkstemp(file);
+	if(fd < 0){
+		printk("xterm_open : mkstemp failed, errno = %d\n", errno);
+		return(-errno);
+	}
+
+	if(unlink(file)){
+		printk("xterm_open : unlink failed, errno = %d\n", errno);
+		return(-errno);
+	}
+	os_close_file(fd);
+
+	fd = os_create_unix_socket(file, sizeof(file), 1);
+	if(fd < 0){
+		printk("xterm_open : create_unix_socket failed, errno = %d\n", 
+		       -fd);
+		return(fd);
+	}
+
+	sprintf(title, data->title, data->device);
+	stack = data->stack;
+	pid = run_helper(NULL, NULL, argv, &stack);
+	if(pid < 0){
+		printk("xterm_open : run_helper failed, errno = %d\n", -pid);
+		return(pid);
+	}
+
+	if(data->stack == 0) free_stack(stack, 0);
+
+	if (data->direct_rcv) {
+		new = os_rcv_fd(fd, &data->helper_pid);
+	} else {
+		err = os_set_fd_block(fd, 0);
+		if(err < 0){
+			printk("xterm_open : failed to set descriptor "
+			       "non-blocking, err = %d\n", -err);
+			return(err);
+		}
+		new = xterm_fd(fd, &data->helper_pid);
+	}
+	if(new < 0){
+		printk("xterm_open : os_rcv_fd failed, err = %d\n", -new);
+		goto out;
+	}
+
+	CATCH_EINTR(err = tcgetattr(new, &data->tt));
+	if(err){
+		new = err;
+		goto out;
+	}
+
+	if(data->raw){
+		err = raw(new);
+		if(err){
+			new = err;
+			goto out;
+		}
+	}
+
+	data->pid = pid;
+	*dev_out = NULL;
+ out:
+	unlink(file);
+	return(new);
+}
+
+/* Not static because it's called directly by the tt mode gdb code */
+void xterm_close(int fd, void *d)
+{
+	struct xterm_chan *data = d;
+	
+	if(data->pid != -1) 
+		os_kill_process(data->pid, 1);
+	data->pid = -1;
+	if(data->helper_pid != -1) 
+		os_kill_process(data->helper_pid, 0);
+	data->helper_pid = -1;
+	os_close_file(fd);
+}
+
+static void xterm_free(void *d)
+{
+	free(d);
+}
+
+static int xterm_console_write(int fd, const char *buf, int n, void *d)
+{
+	struct xterm_chan *data = d;
+
+	return(generic_console_write(fd, buf, n, &data->tt));
+}
+
+struct chan_ops xterm_ops = {
+	.type		= "xterm",
+	.init		= xterm_init,
+	.open		= xterm_open,
+	.close		= xterm_close,
+	.read		= generic_read,
+	.write		= generic_write,
+	.console_write	= xterm_console_write,
+	.window_size	= generic_window_size,
+	.free		= xterm_free,
+	.winch		= 1,
+};
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */