diff options
Diffstat (limited to 'fs/proc')
| -rw-r--r-- | fs/proc/proc_tty.c | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/fs/proc/proc_tty.c b/fs/proc/proc_tty.c index dc44f94..83adcc8 100644 --- a/fs/proc/proc_tty.c +++ b/fs/proc/proc_tty.c @@ -12,10 +12,7 @@ #include <linux/proc_fs.h> #include <linux/stat.h> #include <linux/tty.h> -#include <linux/tty_driver.h> -#include <linux/console.h> #include <linux/seq_file.h> -#include <linux/fdtable.h> #include <linux/bitops.h> /* @@ -140,160 +137,6 @@ static const struct file_operations proc_tty_drivers_operations = { }; /* - * The device ID of file descriptor 0 of the current reading - * task if a character device... - */ -static dev_t current_dev; - -/* - * This is the handler for /proc/tty/consoles - */ -static int show_console_dev(struct seq_file *m, void *v) -{ - const struct tty_driver *driver; - struct console *con; - int index, len; - char flags[10]; - dev_t dev; - - if (v == SEQ_START_TOKEN) - return 0; - con = (struct console *)v; - if (!con) - return 0; - driver = con->device(con, &index); - if (!driver) - return 0; - dev = MKDEV(driver->major, driver->minor_start) + index; - - index = 0; - if (con->flags & CON_ENABLED) - flags[index++] = 'E'; - if (con->flags & CON_CONSDEV) - flags[index++] = 'C'; - if (con->flags & CON_BOOT) - flags[index++] = 'B'; - if (con->flags & CON_PRINTBUFFER) - flags[index++] = 'p'; - if (con->flags & CON_BRL) - flags[index++] = 'b'; - if (con->flags & CON_ANYTIME) - flags[index++] = 'a'; - if (current_dev == dev) - flags[index++] = '*'; - flags[index] = 0; - - seq_printf(m, "%s%d%n", con->name, con->index, &len); - len = 21 - len; - if (len < 1) - len = 1; - seq_printf(m, "%*c", len, ' '); - seq_printf(m, "%c%c%c (%s)%n", con->read ? 'R' : '-', - con->write ? 'W' : '-', con->unblank ? 'U' : '-', - flags, &len); - len = 13 - len; - if (len < 1) - len = 1; - seq_printf(m, "%*c%4d:%d\n", len, ' ', MAJOR(dev), MINOR(dev)); - - return 0; -} - -/* iterator for consoles */ -static void *c_start(struct seq_file *m, loff_t *pos) -{ - struct console *con; - loff_t off = 0; - - if (*pos == 0) - return SEQ_START_TOKEN; - - acquire_console_sem(); - for (con = console_drivers; con; con = con->next) { - if (!con->device) - continue; - if (++off == *pos) - break; - } - release_console_sem(); - - return con; -} - -static void *c_next(struct seq_file *m, void *v, loff_t *pos) -{ - struct console *con; - - acquire_console_sem(); - if (v == SEQ_START_TOKEN) - con = console_drivers; - else - con = ((struct console *)v)->next; - for (; con; con = con->next) { - if (!con->device) - continue; - ++*pos; - break; - } - release_console_sem(); - - return con; -} - -static void c_stop(struct seq_file *m, void *v) -{ -} - -static const struct seq_operations tty_consoles_op = { - .start = c_start, - .next = c_next, - .stop = c_stop, - .show = show_console_dev -}; - -/* - * Used for open /proc/tty/consoles. Before this detect - * the device ID of file descriptor 0 of the current - * reading task if a character device... - */ -static int tty_consoles_open(struct inode *inode, struct file *file) -{ - struct files_struct *curfiles; - - current_dev = 0; - curfiles = get_files_struct(current); - if (curfiles) { - const struct file *curfp; - spin_lock(&curfiles->file_lock); - curfp = fcheck_files(curfiles, 0); - if (curfp && curfp->private_data) { - const struct inode *inode; - dget(curfp->f_dentry); - inode = curfp->f_dentry->d_inode; - if (S_ISCHR(inode->i_mode)) { - struct tty_struct *tty; - tty = (struct tty_struct *)curfp->private_data; - if (tty && tty->magic == TTY_MAGIC) { - tty = tty_pair_get_tty(tty); - current_dev = tty_devnum(tty); - } - } - dput(curfp->f_dentry); - } - spin_unlock(&curfiles->file_lock); - put_files_struct(curfiles); - } - return seq_open(file, &tty_consoles_op); -} - -static const struct file_operations proc_tty_consoles_operations = { - .open = tty_consoles_open, - .read = seq_read, - .llseek = seq_lseek, - .release = seq_release, -}; - -/* * This function is called by tty_register_driver() to handle * registering the driver's /proc handler into /proc/tty/driver/<foo> */ @@ -343,5 +186,4 @@ void __init proc_tty_init(void) proc_tty_driver = proc_mkdir_mode("tty/driver", S_IRUSR|S_IXUSR, NULL); proc_create("tty/ldiscs", 0, NULL, &tty_ldiscs_proc_fops); proc_create("tty/drivers", 0, NULL, &proc_tty_drivers_operations); - proc_create("tty/consoles", 0, NULL, &proc_tty_consoles_operations); } |
