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-rw-r--r--Documentation/filesystems/proc.txt32
-rw-r--r--fs/proc/proc_tty.c158
2 files changed, 0 insertions, 190 deletions
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index 98223a67694..a6aca874088 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -1075,7 +1075,6 @@ Table 1-11: Files in /proc/tty
drivers list of drivers and their usage
ldiscs registered line disciplines
driver/serial usage statistic and status of single tty lines
- consoles registered system console lines
..............................................................................
To see which tty's are currently in use, you can simply look into the file
@@ -1094,37 +1093,6 @@ To see which tty's are currently in use, you can simply look into the file
/dev/tty /dev/tty 5 0 system:/dev/tty
unknown /dev/tty 4 1-63 console
-To see which character device lines are currently used for the system console
-/dev/console, you may simply look into the file /proc/tty/consoles:
-
- > cat /proc/tty/consoles
- tty0 -WU (ECp) 4:7
- ttyS0 -W- (Ep) 4:64
-
-The columns are:
-
- device name of the device
- operations R = can do read operations
- W = can do write operations
- U = can do unblank
- flags E = it is enabled
- C = it is prefered console
- B = it is primary boot console
- p = it is used for printk buffer
- b = it is not a TTY but a Braille device
- a = it is safe to use when cpu is offline
- * = it is standard input of the reading process
- major:minor major and minor number of the device separated by a colon
-
-If the reading process holds /dev/console open at the regular standard input
-stream the active device will be marked by an asterisk:
-
- > cat /proc/tty/consoles < /dev/console
- tty0 -WU (ECp*) 4:7
- ttyS0 -W- (Ep) 4:64
- > tty
- /dev/pts/3
-
1.8 Miscellaneous kernel statistics in /proc/stat
-------------------------------------------------
diff --git a/fs/proc/proc_tty.c b/fs/proc/proc_tty.c
index dc44f94022f..83adcc86943 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);
}
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-11-04 13:30:08 +0000