projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 23308ba5 JS |
1 | /* |
| 2 | * Copyright (c) 2010 Werner Fink, Jiri Slaby | |
| 3 | * | |
| 4 | * Licensed under GPLv2 | |
| 5 | */ | |
| 6 | ||
| 7 | #include <linux/console.h> | |
| 8 | #include <linux/kernel.h> | |
| 9 | #include <linux/proc_fs.h> | |
| 10 | #include <linux/seq_file.h> | |
| 11 | #include <linux/tty_driver.h> | |
| 12 | ||
| 13 | /* | |
| 14 | * This is handler for /proc/consoles | |
| 15 | */ | |
| 16 | static int show_console_dev(struct seq_file *m, void *v) | |
| 17 | { | |
| 18 | static const struct { | |
| 19 | short flag; | |
| 20 | char name; | |
| 21 | } con_flags[] = { | |
| 22 | { CON_ENABLED, 'E' }, | |
| 23 | { CON_CONSDEV, 'C' }, | |
| 24 | { CON_BOOT, 'B' }, | |
| 25 | { CON_PRINTBUFFER, 'p' }, | |
| 26 | { CON_BRL, 'b' }, | |
| 27 | { CON_ANYTIME, 'a' }, | |
| 28 | }; | |
| 29 | char flags[ARRAY_SIZE(con_flags) + 1]; | |
| 30 | struct console *con = v; | |
| 31 | unsigned int a; | |
| 23308ba5 JS |
32 | dev_t dev = 0; |
| 33 | ||
| 34 | if (con->device) { | |
| 35 | const struct tty_driver *driver; | |
| 36 | int index; | |
| 37 | driver = con->device(con, &index); | |
| 38 | if (driver) { | |
| 39 | dev = MKDEV(driver->major, driver->minor_start); | |
| 40 | dev += index; | |
| 41 | } | |
| 42 | } | |
| 43 | ||
| 44 | for (a = 0; a < ARRAY_SIZE(con_flags); a++) | |
| 45 | flags[a] = (con->flags & con_flags[a].flag) ? | |
| 46 | con_flags[a].name : ' '; | |
| 47 | flags[a] = 0; | |
| 48 | ||
| 652586df TH |
49 | seq_setwidth(m, 21 - 1); |
| 50 | seq_printf(m, "%s%d", con->name, con->index); | |
| 51 | seq_pad(m, ' '); | |
| 52 | seq_printf(m, "%c%c%c (%s)", con->read ? 'R' : '-', | |
| 23308ba5 JS |
53 | con->write ? 'W' : '-', con->unblank ? 'U' : '-', |
| 54 | flags); | |
| 55 | if (dev) | |
| 56 | seq_printf(m, " %4d:%d", MAJOR(dev), MINOR(dev)); | |
| 57 | ||
| 4bf8ba81 | 58 | seq_putc(m, '\n'); |
| 23308ba5 JS |
59 | return 0; |
| 60 | } | |
| 61 | ||
| 62 | static void *c_start(struct seq_file *m, loff_t *pos) | |
| 63 | { | |
| 64 | struct console *con; | |
| 65 | loff_t off = 0; | |
| 66 | ||
| ac751efa | 67 | console_lock(); |
| 23308ba5 JS |
68 | for_each_console(con) |
| 69 | if (off++ == *pos) | |
| 70 | break; | |
| 71 | ||
| 72 | return con; | |
| 73 | } | |
| 74 | ||
| 75 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
| 76 | { | |
| 77 | struct console *con = v; | |
| 78 | ++*pos; | |
| 79 | return con->next; | |
| 80 | } | |
| 81 | ||
| 82 | static void c_stop(struct seq_file *m, void *v) | |
| 83 | { | |
| ac751efa | 84 | console_unlock(); |
| 23308ba5 JS |
85 | } |
| 86 | ||
| 87 | static const struct seq_operations consoles_op = { | |
| 88 | .start = c_start, | |
| 89 | .next = c_next, | |
| 90 | .stop = c_stop, | |
| 91 | .show = show_console_dev | |
| 92 | }; | |
| 93 | ||
| bf33cbdf | 94 | static int __init proc_consoles_init(void) |
| 23308ba5 | 95 | { |
| fddda2b7 | 96 | proc_create_seq("consoles", 0, NULL, &consoles_op); |
| 23308ba5 JS |
97 | return 0; |
| 98 | } | |
| abaf3787 | 99 | fs_initcall(proc_consoles_init); |