On Fri, 15 Dec 2000, Linus Torvalds wrote:
> Please instead do the same thing /dev/tty does, namely a sane interface
> that shows it as a symlink in /proc (or even in /dev)
There you go... (/proc/tty/console -> /dev/tty<current_VC>; may very well
be dangling, but then you have a current VC even if your /dev consists
of /dev/console and nothing else, so there's nothing to do about that;
doesn't handle TIOCCONS redirects, but IMO that should be a separate
object anyway).
Cheers,
Al
diff -urN rc12-pre8/fs/proc/proc_tty.c rc12-pre8-tty/fs/proc/proc_tty.c
--- rc12-pre8/fs/proc/proc_tty.c Sat Apr 22 02:35:31 2000
+++ rc12-pre8-tty/fs/proc/proc_tty.c Sat Dec 16 00:14:20 2000
@@ -166,6 +166,26 @@
driver->proc_entry = 0;
}
+extern int fg_console;
+static int proc_cons_readlink(struct dentry *dentry, char *buffer, int buflen)
+{
+ char tmp[30];
+ sprintf(tmp, "/dev/tty%d", fg_console);
+ return vfs_readlink(dentry,buffer,buflen,tmp);
+}
+
+static int proc_cons_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+ char tmp[30];
+ sprintf(tmp, "/dev/tty%d", fg_console);
+ return vfs_follow_link(nd,tmp);
+}
+
+static struct inode_operations proc_cons_operations = {
+ readlink: proc_cons_readlink,
+ follow_link: proc_cons_follow_link,
+};
+
/*
* Called by proc_root_init() to initialize the /proc/tty subtree
*/
@@ -175,6 +195,9 @@
return;
proc_tty_ldisc = proc_mkdir("tty/ldisc", 0);
proc_tty_driver = proc_mkdir("tty/driver", 0);
+
+ proc_tty_console = create_proc_entry("tty/console", S_IFLNK|0777, NULL);
+ proc_tty_console->proc_iops = &proc_console_ops;
create_proc_read_entry("tty/ldiscs", 0, 0, tty_ldiscs_read_proc,NULL);
create_proc_read_entry("tty/drivers", 0, 0, tty_drivers_read_proc,NULL);
-
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