1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2010 Werner Fink, Jiri Slaby
6 #include <linux/console.h>
7 #include <linux/kernel.h>
8 #include <linux/proc_fs.h>
9 #include <linux/seq_file.h>
10 #include <linux/tty_driver.h>
13 * This is handler for /proc/consoles
15 static int show_console_dev(struct seq_file *m, void *v)
24 { CON_PRINTBUFFER, 'p' },
28 char flags[ARRAY_SIZE(con_flags) + 1];
29 struct console *con = v;
34 const struct tty_driver *driver;
36 driver = con->device(con, &index);
38 dev = MKDEV(driver->major, driver->minor_start);
43 for (a = 0; a < ARRAY_SIZE(con_flags); a++)
44 flags[a] = (con->flags & con_flags[a].flag) ?
45 con_flags[a].name : ' ';
48 seq_setwidth(m, 21 - 1);
49 seq_printf(m, "%s%d", con->name, con->index);
51 seq_printf(m, "%c%c%c (%s)", con->read ? 'R' : '-',
52 con->write ? 'W' : '-', con->unblank ? 'U' : '-',
55 seq_printf(m, " %4d:%d", MAJOR(dev), MINOR(dev));
61 static void *c_start(struct seq_file *m, loff_t *pos)
74 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
76 struct console *con = v;
81 static void c_stop(struct seq_file *m, void *v)
86 static const struct seq_operations consoles_op = {
90 .show = show_console_dev
93 static int __init proc_consoles_init(void)
95 proc_create_seq("consoles", 0, NULL, &consoles_op);
98 fs_initcall(proc_consoles_init);