Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 225 insertions, 0 deletions

diff --git a/arch/um/drivers/port_user.c b/arch/um/drivers/port_user.c
new file mode 100644
index 000000000000..14dd2002d2da
--- /dev/null
+++ b/arch/um/drivers/port_user.c
@@ -0,0 +1,225 @@
+/* 
+ * Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include <stdio.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <termios.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <netinet/in.h>
+#include "user_util.h"
+#include "kern_util.h"
+#include "user.h"
+#include "chan_user.h"
+#include "port.h"
+#include "helper.h"
+#include "os.h"
+
+struct port_chan {
+        int raw;
+        struct termios tt;
+        void *kernel_data;
+        char dev[sizeof("32768\0")];
+};
+
+static void *port_init(char *str, int device, struct chan_opts *opts)
+{
+        struct port_chan *data;
+        void *kern_data;
+        char *end;
+        int port;
+
+        if(*str != ':'){
+                printk("port_init : channel type 'port' must specify a "
+                       "port number\n");
+                return(NULL);
+        }
+        str++;
+        port = strtoul(str, &end, 0);
+        if((*end != '\0') || (end == str)){
+                printk("port_init : couldn't parse port '%s'\n", str);
+                return(NULL);
+        }
+
+        kern_data = port_data(port);
+        if(kern_data == NULL)
+                return(NULL);
+
+        data = um_kmalloc(sizeof(*data));
+        if(data == NULL)
+                goto err;
+
+        *data = ((struct port_chan) { .raw              = opts->raw,
+                                      .kernel_data      = kern_data });
+        sprintf(data->dev, "%d", port);
+
+        return(data);
+ err:
+        port_kern_free(kern_data);
+        return(NULL);
+}
+
+static void port_free(void *d)
+{
+        struct port_chan *data = d;
+
+        port_kern_free(data->kernel_data);
+        kfree(data);
+}
+
+static int port_open(int input, int output, int primary, void *d,
+                     char **dev_out)
+{
+        struct port_chan *data = d;
+        int fd, err;
+
+        fd = port_wait(data->kernel_data);
+        if((fd >= 0) && data->raw){
+                CATCH_EINTR(err = tcgetattr(fd, &data->tt));
+                if(err)
+                        return(err);
+
+                err = raw(fd);
+                if(err)
+                        return(err);
+        }
+        *dev_out = data->dev;
+        return(fd);
+}
+
+static void port_close(int fd, void *d)
+{
+        struct port_chan *data = d;
+
+        port_remove_dev(data->kernel_data);
+        os_close_file(fd);
+}
+
+static int port_console_write(int fd, const char *buf, int n, void *d)
+{
+        struct port_chan *data = d;
+
+        return(generic_console_write(fd, buf, n, &data->tt));
+}
+
+struct chan_ops port_ops = {
+        .type           = "port",
+        .init           = port_init,
+        .open           = port_open,
+        .close          = port_close,
+        .read           = generic_read,
+        .write          = generic_write,
+        .console_write  = port_console_write,
+        .window_size    = generic_window_size,
+        .free           = port_free,
+        .winch          = 1,
+};
+
+int port_listen_fd(int port)
+{
+        struct sockaddr_in addr;
+        int fd, err, arg;
+
+        fd = socket(PF_INET, SOCK_STREAM, 0);
+        if(fd == -1) 
+                return(-errno);
+
+        arg = 1;
+        if(setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &arg, sizeof(arg)) < 0){
+                err = -errno;
+                goto out;
+        }
+
+        addr.sin_family = AF_INET;
+        addr.sin_port = htons(port);
+        addr.sin_addr.s_addr = htonl(INADDR_ANY);
+        if(bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0){
+                err = -errno;
+                goto out;
+        }
+  
+        if(listen(fd, 1) < 0){
+                err = -errno;
+                goto out;
+        }
+
+        err = os_set_fd_block(fd, 0);
+        if(err < 0)
+                goto out;
+
+        return(fd);
+ out:
+        os_close_file(fd);
+        return(err);
+}
+
+struct port_pre_exec_data {
+        int sock_fd;
+        int pipe_fd;
+};
+
+void port_pre_exec(void *arg)
+{
+        struct port_pre_exec_data *data = arg;
+
+        dup2(data->sock_fd, 0);
+        dup2(data->sock_fd, 1);
+        dup2(data->sock_fd, 2);
+        os_close_file(data->sock_fd);
+        dup2(data->pipe_fd, 3);
+        os_shutdown_socket(3, 1, 0);
+        os_close_file(data->pipe_fd);
+}
+
+int port_connection(int fd, int *socket, int *pid_out)
+{
+        int new, err;
+        char *argv[] = { "/usr/sbin/in.telnetd", "-L", 
+                         "/usr/lib/uml/port-helper", NULL };
+        struct port_pre_exec_data data;
+
+        new = os_accept_connection(fd);
+        if(new < 0)
+                return(new);
+
+        err = os_pipe(socket, 0, 0);
+        if(err < 0)
+                goto out_close;
+
+        data = ((struct port_pre_exec_data)
+                { .sock_fd              = new,
+                  .pipe_fd              = socket[1] });
+
+        err = run_helper(port_pre_exec, &data, argv, NULL);
+        if(err < 0) 
+                goto out_shutdown;
+
+        *pid_out = err;
+        return(new);
+
+ out_shutdown:
+        os_shutdown_socket(socket[0], 1, 1);
+        os_close_file(socket[0]);
+        os_shutdown_socket(socket[1], 1, 1);    
+        os_close_file(socket[1]);
+ out_close:
+        os_close_file(new);
+        return(err);
+}
+
+/*
+ * 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:
+ */