| 1 |
62 |
marcus.erl |
/*
|
| 2 |
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* linux/drivers/char/vt_ioctl.c
|
| 3 |
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*
|
| 4 |
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* Copyright (C) 1992 obz under the linux copyright
|
| 5 |
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*
|
| 6 |
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* Dynamic diacritical handling - aeb@cwi.nl - Dec 1993
|
| 7 |
|
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* Dynamic keymap and string allocation - aeb@cwi.nl - May 1994
|
| 8 |
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* Restrict VT switching via ioctl() - grif@cs.ucr.edu - Dec 1995
|
| 9 |
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* Some code moved for less code duplication - Andi Kleen - Mar 1997
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| 10 |
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* Check put/get_user, cleanups - acme@conectiva.com.br - Jun 2001
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| 11 |
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*/
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| 12 |
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| 13 |
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#include <linux/types.h>
|
| 14 |
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#include <linux/errno.h>
|
| 15 |
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#include <linux/sched.h>
|
| 16 |
|
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#include <linux/tty.h>
|
| 17 |
|
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#include <linux/timer.h>
|
| 18 |
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#include <linux/kernel.h>
|
| 19 |
|
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#include <linux/kd.h>
|
| 20 |
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#include <linux/vt.h>
|
| 21 |
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#include <linux/string.h>
|
| 22 |
|
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#include <linux/slab.h>
|
| 23 |
|
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#include <linux/major.h>
|
| 24 |
|
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#include <linux/fs.h>
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| 25 |
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#include <linux/console.h>
|
| 26 |
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#include <linux/consolemap.h>
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| 27 |
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#include <linux/signal.h>
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| 28 |
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#include <linux/timex.h>
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| 29 |
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| 30 |
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#include <asm/io.h>
|
| 31 |
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#include <asm/uaccess.h>
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| 32 |
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| 33 |
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#include <linux/kbd_kern.h>
|
| 34 |
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#include <linux/vt_kern.h>
|
| 35 |
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#include <linux/kbd_diacr.h>
|
| 36 |
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#include <linux/selection.h>
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| 37 |
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|
| 38 |
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char vt_dont_switch;
|
| 39 |
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extern struct tty_driver *console_driver;
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| 40 |
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| 41 |
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#define VT_IS_IN_USE(i) (console_driver->ttys[i] && console_driver->ttys[i]->count)
|
| 42 |
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#define VT_BUSY(i) (VT_IS_IN_USE(i) || i == fg_console || vc_cons[i].d == sel_cons)
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| 43 |
|
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| 44 |
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/*
|
| 45 |
|
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* Console (vt and kd) routines, as defined by USL SVR4 manual, and by
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| 46 |
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* experimentation and study of X386 SYSV handling.
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| 47 |
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*
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| 48 |
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* One point of difference: SYSV vt's are /dev/vtX, which X >= 0, and
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| 49 |
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* /dev/console is a separate ttyp. Under Linux, /dev/tty0 is /dev/console,
|
| 50 |
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* and the vc start at /dev/ttyX, X >= 1. We maintain that here, so we will
|
| 51 |
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* always treat our set of vt as numbered 1..MAX_NR_CONSOLES (corresponding to
|
| 52 |
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* ttys 0..MAX_NR_CONSOLES-1). Explicitly naming VT 0 is illegal, but using
|
| 53 |
|
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* /dev/tty0 (fg_console) as a target is legal, since an implicit aliasing
|
| 54 |
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* to the current console is done by the main ioctl code.
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| 55 |
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*/
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| 56 |
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| 57 |
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#ifdef CONFIG_X86
|
| 58 |
|
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#include <linux/syscalls.h>
|
| 59 |
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#endif
|
| 60 |
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|
| 61 |
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static void complete_change_console(struct vc_data *vc);
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| 62 |
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| 63 |
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/*
|
| 64 |
|
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* these are the valid i/o ports we're allowed to change. they map all the
|
| 65 |
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* video ports
|
| 66 |
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*/
|
| 67 |
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#define GPFIRST 0x3b4
|
| 68 |
|
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#define GPLAST 0x3df
|
| 69 |
|
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#define GPNUM (GPLAST - GPFIRST + 1)
|
| 70 |
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|
| 71 |
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#define i (tmp.kb_index)
|
| 72 |
|
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#define s (tmp.kb_table)
|
| 73 |
|
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#define v (tmp.kb_value)
|
| 74 |
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static inline int
|
| 75 |
|
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do_kdsk_ioctl(int cmd, struct kbentry __user *user_kbe, int perm, struct kbd_struct *kbd)
|
| 76 |
|
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{
|
| 77 |
|
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struct kbentry tmp;
|
| 78 |
|
|
ushort *key_map, val, ov;
|
| 79 |
|
|
|
| 80 |
|
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if (copy_from_user(&tmp, user_kbe, sizeof(struct kbentry)))
|
| 81 |
|
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return -EFAULT;
|
| 82 |
|
|
|
| 83 |
|
|
if (!capable(CAP_SYS_TTY_CONFIG))
|
| 84 |
|
|
perm = 0;
|
| 85 |
|
|
|
| 86 |
|
|
switch (cmd) {
|
| 87 |
|
|
case KDGKBENT:
|
| 88 |
|
|
key_map = key_maps[s];
|
| 89 |
|
|
if (key_map) {
|
| 90 |
|
|
val = U(key_map[i]);
|
| 91 |
|
|
if (kbd->kbdmode != VC_UNICODE && KTYP(val) >= NR_TYPES)
|
| 92 |
|
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val = K_HOLE;
|
| 93 |
|
|
} else
|
| 94 |
|
|
val = (i ? K_HOLE : K_NOSUCHMAP);
|
| 95 |
|
|
return put_user(val, &user_kbe->kb_value);
|
| 96 |
|
|
case KDSKBENT:
|
| 97 |
|
|
if (!perm)
|
| 98 |
|
|
return -EPERM;
|
| 99 |
|
|
if (!i && v == K_NOSUCHMAP) {
|
| 100 |
|
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/* deallocate map */
|
| 101 |
|
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key_map = key_maps[s];
|
| 102 |
|
|
if (s && key_map) {
|
| 103 |
|
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key_maps[s] = NULL;
|
| 104 |
|
|
if (key_map[0] == U(K_ALLOCATED)) {
|
| 105 |
|
|
kfree(key_map);
|
| 106 |
|
|
keymap_count--;
|
| 107 |
|
|
}
|
| 108 |
|
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}
|
| 109 |
|
|
break;
|
| 110 |
|
|
}
|
| 111 |
|
|
|
| 112 |
|
|
if (KTYP(v) < NR_TYPES) {
|
| 113 |
|
|
if (KVAL(v) > max_vals[KTYP(v)])
|
| 114 |
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return -EINVAL;
|
| 115 |
|
|
} else
|
| 116 |
|
|
if (kbd->kbdmode != VC_UNICODE)
|
| 117 |
|
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return -EINVAL;
|
| 118 |
|
|
|
| 119 |
|
|
/* ++Geert: non-PC keyboards may generate keycode zero */
|
| 120 |
|
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#if !defined(__mc68000__) && !defined(__powerpc__)
|
| 121 |
|
|
/* assignment to entry 0 only tests validity of args */
|
| 122 |
|
|
if (!i)
|
| 123 |
|
|
break;
|
| 124 |
|
|
#endif
|
| 125 |
|
|
|
| 126 |
|
|
if (!(key_map = key_maps[s])) {
|
| 127 |
|
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int j;
|
| 128 |
|
|
|
| 129 |
|
|
if (keymap_count >= MAX_NR_OF_USER_KEYMAPS &&
|
| 130 |
|
|
!capable(CAP_SYS_RESOURCE))
|
| 131 |
|
|
return -EPERM;
|
| 132 |
|
|
|
| 133 |
|
|
key_map = kmalloc(sizeof(plain_map),
|
| 134 |
|
|
GFP_KERNEL);
|
| 135 |
|
|
if (!key_map)
|
| 136 |
|
|
return -ENOMEM;
|
| 137 |
|
|
key_maps[s] = key_map;
|
| 138 |
|
|
key_map[0] = U(K_ALLOCATED);
|
| 139 |
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for (j = 1; j < NR_KEYS; j++)
|
| 140 |
|
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key_map[j] = U(K_HOLE);
|
| 141 |
|
|
keymap_count++;
|
| 142 |
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}
|
| 143 |
|
|
ov = U(key_map[i]);
|
| 144 |
|
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if (v == ov)
|
| 145 |
|
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break; /* nothing to do */
|
| 146 |
|
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/*
|
| 147 |
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* Attention Key.
|
| 148 |
|
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*/
|
| 149 |
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|
if (((ov == K_SAK) || (v == K_SAK)) && !capable(CAP_SYS_ADMIN))
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| 150 |
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|
return -EPERM;
|
| 151 |
|
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key_map[i] = U(v);
|
| 152 |
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if (!s && (KTYP(ov) == KT_SHIFT || KTYP(v) == KT_SHIFT))
|
| 153 |
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compute_shiftstate();
|
| 154 |
|
|
break;
|
| 155 |
|
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}
|
| 156 |
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return 0;
|
| 157 |
|
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}
|
| 158 |
|
|
#undef i
|
| 159 |
|
|
#undef s
|
| 160 |
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#undef v
|
| 161 |
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|
|
| 162 |
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static inline int
|
| 163 |
|
|
do_kbkeycode_ioctl(int cmd, struct kbkeycode __user *user_kbkc, int perm)
|
| 164 |
|
|
{
|
| 165 |
|
|
struct kbkeycode tmp;
|
| 166 |
|
|
int kc = 0;
|
| 167 |
|
|
|
| 168 |
|
|
if (copy_from_user(&tmp, user_kbkc, sizeof(struct kbkeycode)))
|
| 169 |
|
|
return -EFAULT;
|
| 170 |
|
|
switch (cmd) {
|
| 171 |
|
|
case KDGETKEYCODE:
|
| 172 |
|
|
kc = getkeycode(tmp.scancode);
|
| 173 |
|
|
if (kc >= 0)
|
| 174 |
|
|
kc = put_user(kc, &user_kbkc->keycode);
|
| 175 |
|
|
break;
|
| 176 |
|
|
case KDSETKEYCODE:
|
| 177 |
|
|
if (!perm)
|
| 178 |
|
|
return -EPERM;
|
| 179 |
|
|
kc = setkeycode(tmp.scancode, tmp.keycode);
|
| 180 |
|
|
break;
|
| 181 |
|
|
}
|
| 182 |
|
|
return kc;
|
| 183 |
|
|
}
|
| 184 |
|
|
|
| 185 |
|
|
static inline int
|
| 186 |
|
|
do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb, int perm)
|
| 187 |
|
|
{
|
| 188 |
|
|
struct kbsentry *kbs;
|
| 189 |
|
|
char *p;
|
| 190 |
|
|
u_char *q;
|
| 191 |
|
|
u_char __user *up;
|
| 192 |
|
|
int sz;
|
| 193 |
|
|
int delta;
|
| 194 |
|
|
char *first_free, *fj, *fnw;
|
| 195 |
|
|
int i, j, k;
|
| 196 |
|
|
int ret;
|
| 197 |
|
|
|
| 198 |
|
|
if (!capable(CAP_SYS_TTY_CONFIG))
|
| 199 |
|
|
perm = 0;
|
| 200 |
|
|
|
| 201 |
|
|
kbs = kmalloc(sizeof(*kbs), GFP_KERNEL);
|
| 202 |
|
|
if (!kbs) {
|
| 203 |
|
|
ret = -ENOMEM;
|
| 204 |
|
|
goto reterr;
|
| 205 |
|
|
}
|
| 206 |
|
|
|
| 207 |
|
|
/* we mostly copy too much here (512bytes), but who cares ;) */
|
| 208 |
|
|
if (copy_from_user(kbs, user_kdgkb, sizeof(struct kbsentry))) {
|
| 209 |
|
|
ret = -EFAULT;
|
| 210 |
|
|
goto reterr;
|
| 211 |
|
|
}
|
| 212 |
|
|
kbs->kb_string[sizeof(kbs->kb_string)-1] = '\0';
|
| 213 |
|
|
i = kbs->kb_func;
|
| 214 |
|
|
|
| 215 |
|
|
switch (cmd) {
|
| 216 |
|
|
case KDGKBSENT:
|
| 217 |
|
|
sz = sizeof(kbs->kb_string) - 1; /* sz should have been
|
| 218 |
|
|
a struct member */
|
| 219 |
|
|
up = user_kdgkb->kb_string;
|
| 220 |
|
|
p = func_table[i];
|
| 221 |
|
|
if(p)
|
| 222 |
|
|
for ( ; *p && sz; p++, sz--)
|
| 223 |
|
|
if (put_user(*p, up++)) {
|
| 224 |
|
|
ret = -EFAULT;
|
| 225 |
|
|
goto reterr;
|
| 226 |
|
|
}
|
| 227 |
|
|
if (put_user('\0', up)) {
|
| 228 |
|
|
ret = -EFAULT;
|
| 229 |
|
|
goto reterr;
|
| 230 |
|
|
}
|
| 231 |
|
|
kfree(kbs);
|
| 232 |
|
|
return ((p && *p) ? -EOVERFLOW : 0);
|
| 233 |
|
|
case KDSKBSENT:
|
| 234 |
|
|
if (!perm) {
|
| 235 |
|
|
ret = -EPERM;
|
| 236 |
|
|
goto reterr;
|
| 237 |
|
|
}
|
| 238 |
|
|
|
| 239 |
|
|
q = func_table[i];
|
| 240 |
|
|
first_free = funcbufptr + (funcbufsize - funcbufleft);
|
| 241 |
|
|
for (j = i+1; j < MAX_NR_FUNC && !func_table[j]; j++)
|
| 242 |
|
|
;
|
| 243 |
|
|
if (j < MAX_NR_FUNC)
|
| 244 |
|
|
fj = func_table[j];
|
| 245 |
|
|
else
|
| 246 |
|
|
fj = first_free;
|
| 247 |
|
|
|
| 248 |
|
|
delta = (q ? -strlen(q) : 1) + strlen(kbs->kb_string);
|
| 249 |
|
|
if (delta <= funcbufleft) { /* it fits in current buf */
|
| 250 |
|
|
if (j < MAX_NR_FUNC) {
|
| 251 |
|
|
memmove(fj + delta, fj, first_free - fj);
|
| 252 |
|
|
for (k = j; k < MAX_NR_FUNC; k++)
|
| 253 |
|
|
if (func_table[k])
|
| 254 |
|
|
func_table[k] += delta;
|
| 255 |
|
|
}
|
| 256 |
|
|
if (!q)
|
| 257 |
|
|
func_table[i] = fj;
|
| 258 |
|
|
funcbufleft -= delta;
|
| 259 |
|
|
} else { /* allocate a larger buffer */
|
| 260 |
|
|
sz = 256;
|
| 261 |
|
|
while (sz < funcbufsize - funcbufleft + delta)
|
| 262 |
|
|
sz <<= 1;
|
| 263 |
|
|
fnw = kmalloc(sz, GFP_KERNEL);
|
| 264 |
|
|
if(!fnw) {
|
| 265 |
|
|
ret = -ENOMEM;
|
| 266 |
|
|
goto reterr;
|
| 267 |
|
|
}
|
| 268 |
|
|
|
| 269 |
|
|
if (!q)
|
| 270 |
|
|
func_table[i] = fj;
|
| 271 |
|
|
if (fj > funcbufptr)
|
| 272 |
|
|
memmove(fnw, funcbufptr, fj - funcbufptr);
|
| 273 |
|
|
for (k = 0; k < j; k++)
|
| 274 |
|
|
if (func_table[k])
|
| 275 |
|
|
func_table[k] = fnw + (func_table[k] - funcbufptr);
|
| 276 |
|
|
|
| 277 |
|
|
if (first_free > fj) {
|
| 278 |
|
|
memmove(fnw + (fj - funcbufptr) + delta, fj, first_free - fj);
|
| 279 |
|
|
for (k = j; k < MAX_NR_FUNC; k++)
|
| 280 |
|
|
if (func_table[k])
|
| 281 |
|
|
func_table[k] = fnw + (func_table[k] - funcbufptr) + delta;
|
| 282 |
|
|
}
|
| 283 |
|
|
if (funcbufptr != func_buf)
|
| 284 |
|
|
kfree(funcbufptr);
|
| 285 |
|
|
funcbufptr = fnw;
|
| 286 |
|
|
funcbufleft = funcbufleft - delta + sz - funcbufsize;
|
| 287 |
|
|
funcbufsize = sz;
|
| 288 |
|
|
}
|
| 289 |
|
|
strcpy(func_table[i], kbs->kb_string);
|
| 290 |
|
|
break;
|
| 291 |
|
|
}
|
| 292 |
|
|
ret = 0;
|
| 293 |
|
|
reterr:
|
| 294 |
|
|
kfree(kbs);
|
| 295 |
|
|
return ret;
|
| 296 |
|
|
}
|
| 297 |
|
|
|
| 298 |
|
|
static inline int
|
| 299 |
|
|
do_fontx_ioctl(int cmd, struct consolefontdesc __user *user_cfd, int perm, struct console_font_op *op)
|
| 300 |
|
|
{
|
| 301 |
|
|
struct consolefontdesc cfdarg;
|
| 302 |
|
|
int i;
|
| 303 |
|
|
|
| 304 |
|
|
if (copy_from_user(&cfdarg, user_cfd, sizeof(struct consolefontdesc)))
|
| 305 |
|
|
return -EFAULT;
|
| 306 |
|
|
|
| 307 |
|
|
switch (cmd) {
|
| 308 |
|
|
case PIO_FONTX:
|
| 309 |
|
|
if (!perm)
|
| 310 |
|
|
return -EPERM;
|
| 311 |
|
|
op->op = KD_FONT_OP_SET;
|
| 312 |
|
|
op->flags = KD_FONT_FLAG_OLD;
|
| 313 |
|
|
op->width = 8;
|
| 314 |
|
|
op->height = cfdarg.charheight;
|
| 315 |
|
|
op->charcount = cfdarg.charcount;
|
| 316 |
|
|
op->data = cfdarg.chardata;
|
| 317 |
|
|
return con_font_op(vc_cons[fg_console].d, op);
|
| 318 |
|
|
case GIO_FONTX: {
|
| 319 |
|
|
op->op = KD_FONT_OP_GET;
|
| 320 |
|
|
op->flags = KD_FONT_FLAG_OLD;
|
| 321 |
|
|
op->width = 8;
|
| 322 |
|
|
op->height = cfdarg.charheight;
|
| 323 |
|
|
op->charcount = cfdarg.charcount;
|
| 324 |
|
|
op->data = cfdarg.chardata;
|
| 325 |
|
|
i = con_font_op(vc_cons[fg_console].d, op);
|
| 326 |
|
|
if (i)
|
| 327 |
|
|
return i;
|
| 328 |
|
|
cfdarg.charheight = op->height;
|
| 329 |
|
|
cfdarg.charcount = op->charcount;
|
| 330 |
|
|
if (copy_to_user(user_cfd, &cfdarg, sizeof(struct consolefontdesc)))
|
| 331 |
|
|
return -EFAULT;
|
| 332 |
|
|
return 0;
|
| 333 |
|
|
}
|
| 334 |
|
|
}
|
| 335 |
|
|
return -EINVAL;
|
| 336 |
|
|
}
|
| 337 |
|
|
|
| 338 |
|
|
static inline int
|
| 339 |
|
|
do_unimap_ioctl(int cmd, struct unimapdesc __user *user_ud, int perm, struct vc_data *vc)
|
| 340 |
|
|
{
|
| 341 |
|
|
struct unimapdesc tmp;
|
| 342 |
|
|
|
| 343 |
|
|
if (copy_from_user(&tmp, user_ud, sizeof tmp))
|
| 344 |
|
|
return -EFAULT;
|
| 345 |
|
|
if (tmp.entries)
|
| 346 |
|
|
if (!access_ok(VERIFY_WRITE, tmp.entries,
|
| 347 |
|
|
tmp.entry_ct*sizeof(struct unipair)))
|
| 348 |
|
|
return -EFAULT;
|
| 349 |
|
|
switch (cmd) {
|
| 350 |
|
|
case PIO_UNIMAP:
|
| 351 |
|
|
if (!perm)
|
| 352 |
|
|
return -EPERM;
|
| 353 |
|
|
return con_set_unimap(vc, tmp.entry_ct, tmp.entries);
|
| 354 |
|
|
case GIO_UNIMAP:
|
| 355 |
|
|
if (!perm && fg_console != vc->vc_num)
|
| 356 |
|
|
return -EPERM;
|
| 357 |
|
|
return con_get_unimap(vc, tmp.entry_ct, &(user_ud->entry_ct), tmp.entries);
|
| 358 |
|
|
}
|
| 359 |
|
|
return 0;
|
| 360 |
|
|
}
|
| 361 |
|
|
|
| 362 |
|
|
/*
|
| 363 |
|
|
* We handle the console-specific ioctl's here. We allow the
|
| 364 |
|
|
* capability to modify any console, not just the fg_console.
|
| 365 |
|
|
*/
|
| 366 |
|
|
int vt_ioctl(struct tty_struct *tty, struct file * file,
|
| 367 |
|
|
unsigned int cmd, unsigned long arg)
|
| 368 |
|
|
{
|
| 369 |
|
|
struct vc_data *vc = (struct vc_data *)tty->driver_data;
|
| 370 |
|
|
struct console_font_op op; /* used in multiple places here */
|
| 371 |
|
|
struct kbd_struct * kbd;
|
| 372 |
|
|
unsigned int console;
|
| 373 |
|
|
unsigned char ucval;
|
| 374 |
|
|
void __user *up = (void __user *)arg;
|
| 375 |
|
|
int i, perm;
|
| 376 |
|
|
|
| 377 |
|
|
console = vc->vc_num;
|
| 378 |
|
|
|
| 379 |
|
|
if (!vc_cons_allocated(console)) /* impossible? */
|
| 380 |
|
|
return -ENOIOCTLCMD;
|
| 381 |
|
|
|
| 382 |
|
|
/*
|
| 383 |
|
|
* To have permissions to do most of the vt ioctls, we either have
|
| 384 |
|
|
* to be the owner of the tty, or have CAP_SYS_TTY_CONFIG.
|
| 385 |
|
|
*/
|
| 386 |
|
|
perm = 0;
|
| 387 |
|
|
if (current->signal->tty == tty || capable(CAP_SYS_TTY_CONFIG))
|
| 388 |
|
|
perm = 1;
|
| 389 |
|
|
|
| 390 |
|
|
kbd = kbd_table + console;
|
| 391 |
|
|
switch (cmd) {
|
| 392 |
|
|
case KIOCSOUND:
|
| 393 |
|
|
if (!perm)
|
| 394 |
|
|
return -EPERM;
|
| 395 |
|
|
if (arg)
|
| 396 |
|
|
arg = CLOCK_TICK_RATE / arg;
|
| 397 |
|
|
kd_mksound(arg, 0);
|
| 398 |
|
|
return 0;
|
| 399 |
|
|
|
| 400 |
|
|
case KDMKTONE:
|
| 401 |
|
|
if (!perm)
|
| 402 |
|
|
return -EPERM;
|
| 403 |
|
|
{
|
| 404 |
|
|
unsigned int ticks, count;
|
| 405 |
|
|
|
| 406 |
|
|
/*
|
| 407 |
|
|
* Generate the tone for the appropriate number of ticks.
|
| 408 |
|
|
* If the time is zero, turn off sound ourselves.
|
| 409 |
|
|
*/
|
| 410 |
|
|
ticks = HZ * ((arg >> 16) & 0xffff) / 1000;
|
| 411 |
|
|
count = ticks ? (arg & 0xffff) : 0;
|
| 412 |
|
|
if (count)
|
| 413 |
|
|
count = CLOCK_TICK_RATE / count;
|
| 414 |
|
|
kd_mksound(count, ticks);
|
| 415 |
|
|
return 0;
|
| 416 |
|
|
}
|
| 417 |
|
|
|
| 418 |
|
|
case KDGKBTYPE:
|
| 419 |
|
|
/*
|
| 420 |
|
|
* this is naive.
|
| 421 |
|
|
*/
|
| 422 |
|
|
ucval = KB_101;
|
| 423 |
|
|
goto setchar;
|
| 424 |
|
|
|
| 425 |
|
|
/*
|
| 426 |
|
|
* These cannot be implemented on any machine that implements
|
| 427 |
|
|
* ioperm() in user level (such as Alpha PCs) or not at all.
|
| 428 |
|
|
*
|
| 429 |
|
|
* XXX: you should never use these, just call ioperm directly..
|
| 430 |
|
|
*/
|
| 431 |
|
|
#ifdef CONFIG_X86
|
| 432 |
|
|
case KDADDIO:
|
| 433 |
|
|
case KDDELIO:
|
| 434 |
|
|
/*
|
| 435 |
|
|
* KDADDIO and KDDELIO may be able to add ports beyond what
|
| 436 |
|
|
* we reject here, but to be safe...
|
| 437 |
|
|
*/
|
| 438 |
|
|
if (arg < GPFIRST || arg > GPLAST)
|
| 439 |
|
|
return -EINVAL;
|
| 440 |
|
|
return sys_ioperm(arg, 1, (cmd == KDADDIO)) ? -ENXIO : 0;
|
| 441 |
|
|
|
| 442 |
|
|
case KDENABIO:
|
| 443 |
|
|
case KDDISABIO:
|
| 444 |
|
|
return sys_ioperm(GPFIRST, GPNUM,
|
| 445 |
|
|
(cmd == KDENABIO)) ? -ENXIO : 0;
|
| 446 |
|
|
#endif
|
| 447 |
|
|
|
| 448 |
|
|
/* Linux m68k/i386 interface for setting the keyboard delay/repeat rate */
|
| 449 |
|
|
|
| 450 |
|
|
case KDKBDREP:
|
| 451 |
|
|
{
|
| 452 |
|
|
struct kbd_repeat kbrep;
|
| 453 |
|
|
int err;
|
| 454 |
|
|
|
| 455 |
|
|
if (!capable(CAP_SYS_TTY_CONFIG))
|
| 456 |
|
|
return -EPERM;
|
| 457 |
|
|
|
| 458 |
|
|
if (copy_from_user(&kbrep, up, sizeof(struct kbd_repeat)))
|
| 459 |
|
|
return -EFAULT;
|
| 460 |
|
|
err = kbd_rate(&kbrep);
|
| 461 |
|
|
if (err)
|
| 462 |
|
|
return err;
|
| 463 |
|
|
if (copy_to_user(up, &kbrep, sizeof(struct kbd_repeat)))
|
| 464 |
|
|
return -EFAULT;
|
| 465 |
|
|
return 0;
|
| 466 |
|
|
}
|
| 467 |
|
|
|
| 468 |
|
|
case KDSETMODE:
|
| 469 |
|
|
/*
|
| 470 |
|
|
* currently, setting the mode from KD_TEXT to KD_GRAPHICS
|
| 471 |
|
|
* doesn't do a whole lot. i'm not sure if it should do any
|
| 472 |
|
|
* restoration of modes or what...
|
| 473 |
|
|
*
|
| 474 |
|
|
* XXX It should at least call into the driver, fbdev's definitely
|
| 475 |
|
|
* need to restore their engine state. --BenH
|
| 476 |
|
|
*/
|
| 477 |
|
|
if (!perm)
|
| 478 |
|
|
return -EPERM;
|
| 479 |
|
|
switch (arg) {
|
| 480 |
|
|
case KD_GRAPHICS:
|
| 481 |
|
|
break;
|
| 482 |
|
|
case KD_TEXT0:
|
| 483 |
|
|
case KD_TEXT1:
|
| 484 |
|
|
arg = KD_TEXT;
|
| 485 |
|
|
case KD_TEXT:
|
| 486 |
|
|
break;
|
| 487 |
|
|
default:
|
| 488 |
|
|
return -EINVAL;
|
| 489 |
|
|
}
|
| 490 |
|
|
if (vc->vc_mode == (unsigned char) arg)
|
| 491 |
|
|
return 0;
|
| 492 |
|
|
vc->vc_mode = (unsigned char) arg;
|
| 493 |
|
|
if (console != fg_console)
|
| 494 |
|
|
return 0;
|
| 495 |
|
|
/*
|
| 496 |
|
|
* explicitly blank/unblank the screen if switching modes
|
| 497 |
|
|
*/
|
| 498 |
|
|
acquire_console_sem();
|
| 499 |
|
|
if (arg == KD_TEXT)
|
| 500 |
|
|
do_unblank_screen(1);
|
| 501 |
|
|
else
|
| 502 |
|
|
do_blank_screen(1);
|
| 503 |
|
|
release_console_sem();
|
| 504 |
|
|
return 0;
|
| 505 |
|
|
|
| 506 |
|
|
case KDGETMODE:
|
| 507 |
|
|
ucval = vc->vc_mode;
|
| 508 |
|
|
goto setint;
|
| 509 |
|
|
|
| 510 |
|
|
case KDMAPDISP:
|
| 511 |
|
|
case KDUNMAPDISP:
|
| 512 |
|
|
/*
|
| 513 |
|
|
* these work like a combination of mmap and KDENABIO.
|
| 514 |
|
|
* this could be easily finished.
|
| 515 |
|
|
*/
|
| 516 |
|
|
return -EINVAL;
|
| 517 |
|
|
|
| 518 |
|
|
case KDSKBMODE:
|
| 519 |
|
|
if (!perm)
|
| 520 |
|
|
return -EPERM;
|
| 521 |
|
|
switch(arg) {
|
| 522 |
|
|
case K_RAW:
|
| 523 |
|
|
kbd->kbdmode = VC_RAW;
|
| 524 |
|
|
break;
|
| 525 |
|
|
case K_MEDIUMRAW:
|
| 526 |
|
|
kbd->kbdmode = VC_MEDIUMRAW;
|
| 527 |
|
|
break;
|
| 528 |
|
|
case K_XLATE:
|
| 529 |
|
|
kbd->kbdmode = VC_XLATE;
|
| 530 |
|
|
compute_shiftstate();
|
| 531 |
|
|
break;
|
| 532 |
|
|
case K_UNICODE:
|
| 533 |
|
|
kbd->kbdmode = VC_UNICODE;
|
| 534 |
|
|
compute_shiftstate();
|
| 535 |
|
|
break;
|
| 536 |
|
|
default:
|
| 537 |
|
|
return -EINVAL;
|
| 538 |
|
|
}
|
| 539 |
|
|
tty_ldisc_flush(tty);
|
| 540 |
|
|
return 0;
|
| 541 |
|
|
|
| 542 |
|
|
case KDGKBMODE:
|
| 543 |
|
|
ucval = ((kbd->kbdmode == VC_RAW) ? K_RAW :
|
| 544 |
|
|
(kbd->kbdmode == VC_MEDIUMRAW) ? K_MEDIUMRAW :
|
| 545 |
|
|
(kbd->kbdmode == VC_UNICODE) ? K_UNICODE :
|
| 546 |
|
|
K_XLATE);
|
| 547 |
|
|
goto setint;
|
| 548 |
|
|
|
| 549 |
|
|
/* this could be folded into KDSKBMODE, but for compatibility
|
| 550 |
|
|
reasons it is not so easy to fold KDGKBMETA into KDGKBMODE */
|
| 551 |
|
|
case KDSKBMETA:
|
| 552 |
|
|
switch(arg) {
|
| 553 |
|
|
case K_METABIT:
|
| 554 |
|
|
clr_vc_kbd_mode(kbd, VC_META);
|
| 555 |
|
|
break;
|
| 556 |
|
|
case K_ESCPREFIX:
|
| 557 |
|
|
set_vc_kbd_mode(kbd, VC_META);
|
| 558 |
|
|
break;
|
| 559 |
|
|
default:
|
| 560 |
|
|
return -EINVAL;
|
| 561 |
|
|
}
|
| 562 |
|
|
return 0;
|
| 563 |
|
|
|
| 564 |
|
|
case KDGKBMETA:
|
| 565 |
|
|
ucval = (vc_kbd_mode(kbd, VC_META) ? K_ESCPREFIX : K_METABIT);
|
| 566 |
|
|
setint:
|
| 567 |
|
|
return put_user(ucval, (int __user *)arg);
|
| 568 |
|
|
|
| 569 |
|
|
case KDGETKEYCODE:
|
| 570 |
|
|
case KDSETKEYCODE:
|
| 571 |
|
|
if(!capable(CAP_SYS_TTY_CONFIG))
|
| 572 |
|
|
perm=0;
|
| 573 |
|
|
return do_kbkeycode_ioctl(cmd, up, perm);
|
| 574 |
|
|
|
| 575 |
|
|
case KDGKBENT:
|
| 576 |
|
|
case KDSKBENT:
|
| 577 |
|
|
return do_kdsk_ioctl(cmd, up, perm, kbd);
|
| 578 |
|
|
|
| 579 |
|
|
case KDGKBSENT:
|
| 580 |
|
|
case KDSKBSENT:
|
| 581 |
|
|
return do_kdgkb_ioctl(cmd, up, perm);
|
| 582 |
|
|
|
| 583 |
|
|
case KDGKBDIACR:
|
| 584 |
|
|
{
|
| 585 |
|
|
struct kbdiacrs __user *a = up;
|
| 586 |
|
|
struct kbdiacr diacr;
|
| 587 |
|
|
int i;
|
| 588 |
|
|
|
| 589 |
|
|
if (put_user(accent_table_size, &a->kb_cnt))
|
| 590 |
|
|
return -EFAULT;
|
| 591 |
|
|
for (i = 0; i < accent_table_size; i++) {
|
| 592 |
|
|
diacr.diacr = conv_uni_to_8bit(accent_table[i].diacr);
|
| 593 |
|
|
diacr.base = conv_uni_to_8bit(accent_table[i].base);
|
| 594 |
|
|
diacr.result = conv_uni_to_8bit(accent_table[i].result);
|
| 595 |
|
|
if (copy_to_user(a->kbdiacr + i, &diacr, sizeof(struct kbdiacr)))
|
| 596 |
|
|
return -EFAULT;
|
| 597 |
|
|
}
|
| 598 |
|
|
return 0;
|
| 599 |
|
|
}
|
| 600 |
|
|
case KDGKBDIACRUC:
|
| 601 |
|
|
{
|
| 602 |
|
|
struct kbdiacrsuc __user *a = up;
|
| 603 |
|
|
|
| 604 |
|
|
if (put_user(accent_table_size, &a->kb_cnt))
|
| 605 |
|
|
return -EFAULT;
|
| 606 |
|
|
if (copy_to_user(a->kbdiacruc, accent_table, accent_table_size*sizeof(struct kbdiacruc)))
|
| 607 |
|
|
return -EFAULT;
|
| 608 |
|
|
return 0;
|
| 609 |
|
|
}
|
| 610 |
|
|
|
| 611 |
|
|
case KDSKBDIACR:
|
| 612 |
|
|
{
|
| 613 |
|
|
struct kbdiacrs __user *a = up;
|
| 614 |
|
|
struct kbdiacr diacr;
|
| 615 |
|
|
unsigned int ct;
|
| 616 |
|
|
int i;
|
| 617 |
|
|
|
| 618 |
|
|
if (!perm)
|
| 619 |
|
|
return -EPERM;
|
| 620 |
|
|
if (get_user(ct,&a->kb_cnt))
|
| 621 |
|
|
return -EFAULT;
|
| 622 |
|
|
if (ct >= MAX_DIACR)
|
| 623 |
|
|
return -EINVAL;
|
| 624 |
|
|
accent_table_size = ct;
|
| 625 |
|
|
for (i = 0; i < ct; i++) {
|
| 626 |
|
|
if (copy_from_user(&diacr, a->kbdiacr + i, sizeof(struct kbdiacr)))
|
| 627 |
|
|
return -EFAULT;
|
| 628 |
|
|
accent_table[i].diacr = conv_8bit_to_uni(diacr.diacr);
|
| 629 |
|
|
accent_table[i].base = conv_8bit_to_uni(diacr.base);
|
| 630 |
|
|
accent_table[i].result = conv_8bit_to_uni(diacr.result);
|
| 631 |
|
|
}
|
| 632 |
|
|
return 0;
|
| 633 |
|
|
}
|
| 634 |
|
|
|
| 635 |
|
|
case KDSKBDIACRUC:
|
| 636 |
|
|
{
|
| 637 |
|
|
struct kbdiacrsuc __user *a = up;
|
| 638 |
|
|
unsigned int ct;
|
| 639 |
|
|
|
| 640 |
|
|
if (!perm)
|
| 641 |
|
|
return -EPERM;
|
| 642 |
|
|
if (get_user(ct,&a->kb_cnt))
|
| 643 |
|
|
return -EFAULT;
|
| 644 |
|
|
if (ct >= MAX_DIACR)
|
| 645 |
|
|
return -EINVAL;
|
| 646 |
|
|
accent_table_size = ct;
|
| 647 |
|
|
if (copy_from_user(accent_table, a->kbdiacruc, ct*sizeof(struct kbdiacruc)))
|
| 648 |
|
|
return -EFAULT;
|
| 649 |
|
|
return 0;
|
| 650 |
|
|
}
|
| 651 |
|
|
|
| 652 |
|
|
/* the ioctls below read/set the flags usually shown in the leds */
|
| 653 |
|
|
/* don't use them - they will go away without warning */
|
| 654 |
|
|
case KDGKBLED:
|
| 655 |
|
|
ucval = kbd->ledflagstate | (kbd->default_ledflagstate << 4);
|
| 656 |
|
|
goto setchar;
|
| 657 |
|
|
|
| 658 |
|
|
case KDSKBLED:
|
| 659 |
|
|
if (!perm)
|
| 660 |
|
|
return -EPERM;
|
| 661 |
|
|
if (arg & ~0x77)
|
| 662 |
|
|
return -EINVAL;
|
| 663 |
|
|
kbd->ledflagstate = (arg & 7);
|
| 664 |
|
|
kbd->default_ledflagstate = ((arg >> 4) & 7);
|
| 665 |
|
|
set_leds();
|
| 666 |
|
|
return 0;
|
| 667 |
|
|
|
| 668 |
|
|
/* the ioctls below only set the lights, not the functions */
|
| 669 |
|
|
/* for those, see KDGKBLED and KDSKBLED above */
|
| 670 |
|
|
case KDGETLED:
|
| 671 |
|
|
ucval = getledstate();
|
| 672 |
|
|
setchar:
|
| 673 |
|
|
return put_user(ucval, (char __user *)arg);
|
| 674 |
|
|
|
| 675 |
|
|
case KDSETLED:
|
| 676 |
|
|
if (!perm)
|
| 677 |
|
|
return -EPERM;
|
| 678 |
|
|
setledstate(kbd, arg);
|
| 679 |
|
|
return 0;
|
| 680 |
|
|
|
| 681 |
|
|
/*
|
| 682 |
|
|
* A process can indicate its willingness to accept signals
|
| 683 |
|
|
* generated by pressing an appropriate key combination.
|
| 684 |
|
|
* Thus, one can have a daemon that e.g. spawns a new console
|
| 685 |
|
|
* upon a keypress and then changes to it.
|
| 686 |
|
|
* See also the kbrequest field of inittab(5).
|
| 687 |
|
|
*/
|
| 688 |
|
|
case KDSIGACCEPT:
|
| 689 |
|
|
{
|
| 690 |
|
|
if (!perm || !capable(CAP_KILL))
|
| 691 |
|
|
return -EPERM;
|
| 692 |
|
|
if (!valid_signal(arg) || arg < 1 || arg == SIGKILL)
|
| 693 |
|
|
return -EINVAL;
|
| 694 |
|
|
|
| 695 |
|
|
spin_lock_irq(&vt_spawn_con.lock);
|
| 696 |
|
|
put_pid(vt_spawn_con.pid);
|
| 697 |
|
|
vt_spawn_con.pid = get_pid(task_pid(current));
|
| 698 |
|
|
vt_spawn_con.sig = arg;
|
| 699 |
|
|
spin_unlock_irq(&vt_spawn_con.lock);
|
| 700 |
|
|
return 0;
|
| 701 |
|
|
}
|
| 702 |
|
|
|
| 703 |
|
|
case VT_SETMODE:
|
| 704 |
|
|
{
|
| 705 |
|
|
struct vt_mode tmp;
|
| 706 |
|
|
|
| 707 |
|
|
if (!perm)
|
| 708 |
|
|
return -EPERM;
|
| 709 |
|
|
if (copy_from_user(&tmp, up, sizeof(struct vt_mode)))
|
| 710 |
|
|
return -EFAULT;
|
| 711 |
|
|
if (tmp.mode != VT_AUTO && tmp.mode != VT_PROCESS)
|
| 712 |
|
|
return -EINVAL;
|
| 713 |
|
|
acquire_console_sem();
|
| 714 |
|
|
vc->vt_mode = tmp;
|
| 715 |
|
|
/* the frsig is ignored, so we set it to 0 */
|
| 716 |
|
|
vc->vt_mode.frsig = 0;
|
| 717 |
|
|
put_pid(vc->vt_pid);
|
| 718 |
|
|
vc->vt_pid = get_pid(task_pid(current));
|
| 719 |
|
|
/* no switch is required -- saw@shade.msu.ru */
|
| 720 |
|
|
vc->vt_newvt = -1;
|
| 721 |
|
|
release_console_sem();
|
| 722 |
|
|
return 0;
|
| 723 |
|
|
}
|
| 724 |
|
|
|
| 725 |
|
|
case VT_GETMODE:
|
| 726 |
|
|
{
|
| 727 |
|
|
struct vt_mode tmp;
|
| 728 |
|
|
int rc;
|
| 729 |
|
|
|
| 730 |
|
|
acquire_console_sem();
|
| 731 |
|
|
memcpy(&tmp, &vc->vt_mode, sizeof(struct vt_mode));
|
| 732 |
|
|
release_console_sem();
|
| 733 |
|
|
|
| 734 |
|
|
rc = copy_to_user(up, &tmp, sizeof(struct vt_mode));
|
| 735 |
|
|
return rc ? -EFAULT : 0;
|
| 736 |
|
|
}
|
| 737 |
|
|
|
| 738 |
|
|
/*
|
| 739 |
|
|
* Returns global vt state. Note that VT 0 is always open, since
|
| 740 |
|
|
* it's an alias for the current VT, and people can't use it here.
|
| 741 |
|
|
* We cannot return state for more than 16 VTs, since v_state is short.
|
| 742 |
|
|
*/
|
| 743 |
|
|
case VT_GETSTATE:
|
| 744 |
|
|
{
|
| 745 |
|
|
struct vt_stat __user *vtstat = up;
|
| 746 |
|
|
unsigned short state, mask;
|
| 747 |
|
|
|
| 748 |
|
|
if (put_user(fg_console + 1, &vtstat->v_active))
|
| 749 |
|
|
return -EFAULT;
|
| 750 |
|
|
state = 1; /* /dev/tty0 is always open */
|
| 751 |
|
|
for (i = 0, mask = 2; i < MAX_NR_CONSOLES && mask; ++i, mask <<= 1)
|
| 752 |
|
|
if (VT_IS_IN_USE(i))
|
| 753 |
|
|
state |= mask;
|
| 754 |
|
|
return put_user(state, &vtstat->v_state);
|
| 755 |
|
|
}
|
| 756 |
|
|
|
| 757 |
|
|
/*
|
| 758 |
|
|
* Returns the first available (non-opened) console.
|
| 759 |
|
|
*/
|
| 760 |
|
|
case VT_OPENQRY:
|
| 761 |
|
|
for (i = 0; i < MAX_NR_CONSOLES; ++i)
|
| 762 |
|
|
if (! VT_IS_IN_USE(i))
|
| 763 |
|
|
break;
|
| 764 |
|
|
ucval = i < MAX_NR_CONSOLES ? (i+1) : -1;
|
| 765 |
|
|
goto setint;
|
| 766 |
|
|
|
| 767 |
|
|
/*
|
| 768 |
|
|
* ioctl(fd, VT_ACTIVATE, num) will cause us to switch to vt # num,
|
| 769 |
|
|
* with num >= 1 (switches to vt 0, our console, are not allowed, just
|
| 770 |
|
|
* to preserve sanity).
|
| 771 |
|
|
*/
|
| 772 |
|
|
case VT_ACTIVATE:
|
| 773 |
|
|
if (!perm)
|
| 774 |
|
|
return -EPERM;
|
| 775 |
|
|
if (arg == 0 || arg > MAX_NR_CONSOLES)
|
| 776 |
|
|
return -ENXIO;
|
| 777 |
|
|
arg--;
|
| 778 |
|
|
acquire_console_sem();
|
| 779 |
|
|
i = vc_allocate(arg);
|
| 780 |
|
|
release_console_sem();
|
| 781 |
|
|
if (i)
|
| 782 |
|
|
return i;
|
| 783 |
|
|
set_console(arg);
|
| 784 |
|
|
return 0;
|
| 785 |
|
|
|
| 786 |
|
|
/*
|
| 787 |
|
|
* wait until the specified VT has been activated
|
| 788 |
|
|
*/
|
| 789 |
|
|
case VT_WAITACTIVE:
|
| 790 |
|
|
if (!perm)
|
| 791 |
|
|
return -EPERM;
|
| 792 |
|
|
if (arg == 0 || arg > MAX_NR_CONSOLES)
|
| 793 |
|
|
return -ENXIO;
|
| 794 |
|
|
return vt_waitactive(arg-1);
|
| 795 |
|
|
|
| 796 |
|
|
/*
|
| 797 |
|
|
* If a vt is under process control, the kernel will not switch to it
|
| 798 |
|
|
* immediately, but postpone the operation until the process calls this
|
| 799 |
|
|
* ioctl, allowing the switch to complete.
|
| 800 |
|
|
*
|
| 801 |
|
|
* According to the X sources this is the behavior:
|
| 802 |
|
|
* 0: pending switch-from not OK
|
| 803 |
|
|
* 1: pending switch-from OK
|
| 804 |
|
|
* 2: completed switch-to OK
|
| 805 |
|
|
*/
|
| 806 |
|
|
case VT_RELDISP:
|
| 807 |
|
|
if (!perm)
|
| 808 |
|
|
return -EPERM;
|
| 809 |
|
|
if (vc->vt_mode.mode != VT_PROCESS)
|
| 810 |
|
|
return -EINVAL;
|
| 811 |
|
|
|
| 812 |
|
|
/*
|
| 813 |
|
|
* Switching-from response
|
| 814 |
|
|
*/
|
| 815 |
|
|
acquire_console_sem();
|
| 816 |
|
|
if (vc->vt_newvt >= 0) {
|
| 817 |
|
|
if (arg == 0)
|
| 818 |
|
|
/*
|
| 819 |
|
|
* Switch disallowed, so forget we were trying
|
| 820 |
|
|
* to do it.
|
| 821 |
|
|
*/
|
| 822 |
|
|
vc->vt_newvt = -1;
|
| 823 |
|
|
|
| 824 |
|
|
else {
|
| 825 |
|
|
/*
|
| 826 |
|
|
* The current vt has been released, so
|
| 827 |
|
|
* complete the switch.
|
| 828 |
|
|
*/
|
| 829 |
|
|
int newvt;
|
| 830 |
|
|
newvt = vc->vt_newvt;
|
| 831 |
|
|
vc->vt_newvt = -1;
|
| 832 |
|
|
i = vc_allocate(newvt);
|
| 833 |
|
|
if (i) {
|
| 834 |
|
|
release_console_sem();
|
| 835 |
|
|
return i;
|
| 836 |
|
|
}
|
| 837 |
|
|
/*
|
| 838 |
|
|
* When we actually do the console switch,
|
| 839 |
|
|
* make sure we are atomic with respect to
|
| 840 |
|
|
* other console switches..
|
| 841 |
|
|
*/
|
| 842 |
|
|
complete_change_console(vc_cons[newvt].d);
|
| 843 |
|
|
}
|
| 844 |
|
|
}
|
| 845 |
|
|
|
| 846 |
|
|
/*
|
| 847 |
|
|
* Switched-to response
|
| 848 |
|
|
*/
|
| 849 |
|
|
else
|
| 850 |
|
|
{
|
| 851 |
|
|
/*
|
| 852 |
|
|
* If it's just an ACK, ignore it
|
| 853 |
|
|
*/
|
| 854 |
|
|
if (arg != VT_ACKACQ) {
|
| 855 |
|
|
release_console_sem();
|
| 856 |
|
|
return -EINVAL;
|
| 857 |
|
|
}
|
| 858 |
|
|
}
|
| 859 |
|
|
release_console_sem();
|
| 860 |
|
|
|
| 861 |
|
|
return 0;
|
| 862 |
|
|
|
| 863 |
|
|
/*
|
| 864 |
|
|
* Disallocate memory associated to VT (but leave VT1)
|
| 865 |
|
|
*/
|
| 866 |
|
|
case VT_DISALLOCATE:
|
| 867 |
|
|
if (arg > MAX_NR_CONSOLES)
|
| 868 |
|
|
return -ENXIO;
|
| 869 |
|
|
if (arg == 0) {
|
| 870 |
|
|
/* deallocate all unused consoles, but leave 0 */
|
| 871 |
|
|
acquire_console_sem();
|
| 872 |
|
|
for (i=1; i<MAX_NR_CONSOLES; i++)
|
| 873 |
|
|
if (! VT_BUSY(i))
|
| 874 |
|
|
vc_deallocate(i);
|
| 875 |
|
|
release_console_sem();
|
| 876 |
|
|
} else {
|
| 877 |
|
|
/* deallocate a single console, if possible */
|
| 878 |
|
|
arg--;
|
| 879 |
|
|
if (VT_BUSY(arg))
|
| 880 |
|
|
return -EBUSY;
|
| 881 |
|
|
if (arg) { /* leave 0 */
|
| 882 |
|
|
acquire_console_sem();
|
| 883 |
|
|
vc_deallocate(arg);
|
| 884 |
|
|
release_console_sem();
|
| 885 |
|
|
}
|
| 886 |
|
|
}
|
| 887 |
|
|
return 0;
|
| 888 |
|
|
|
| 889 |
|
|
case VT_RESIZE:
|
| 890 |
|
|
{
|
| 891 |
|
|
struct vt_sizes __user *vtsizes = up;
|
| 892 |
|
|
struct vc_data *vc;
|
| 893 |
|
|
|
| 894 |
|
|
ushort ll,cc;
|
| 895 |
|
|
if (!perm)
|
| 896 |
|
|
return -EPERM;
|
| 897 |
|
|
if (get_user(ll, &vtsizes->v_rows) ||
|
| 898 |
|
|
get_user(cc, &vtsizes->v_cols))
|
| 899 |
|
|
return -EFAULT;
|
| 900 |
|
|
|
| 901 |
|
|
for (i = 0; i < MAX_NR_CONSOLES; i++) {
|
| 902 |
|
|
vc = vc_cons[i].d;
|
| 903 |
|
|
|
| 904 |
|
|
if (vc) {
|
| 905 |
|
|
vc->vc_resize_user = 1;
|
| 906 |
|
|
vc_lock_resize(vc_cons[i].d, cc, ll);
|
| 907 |
|
|
}
|
| 908 |
|
|
}
|
| 909 |
|
|
|
| 910 |
|
|
return 0;
|
| 911 |
|
|
}
|
| 912 |
|
|
|
| 913 |
|
|
case VT_RESIZEX:
|
| 914 |
|
|
{
|
| 915 |
|
|
struct vt_consize __user *vtconsize = up;
|
| 916 |
|
|
ushort ll,cc,vlin,clin,vcol,ccol;
|
| 917 |
|
|
if (!perm)
|
| 918 |
|
|
return -EPERM;
|
| 919 |
|
|
if (!access_ok(VERIFY_READ, vtconsize,
|
| 920 |
|
|
sizeof(struct vt_consize)))
|
| 921 |
|
|
return -EFAULT;
|
| 922 |
|
|
__get_user(ll, &vtconsize->v_rows);
|
| 923 |
|
|
__get_user(cc, &vtconsize->v_cols);
|
| 924 |
|
|
__get_user(vlin, &vtconsize->v_vlin);
|
| 925 |
|
|
__get_user(clin, &vtconsize->v_clin);
|
| 926 |
|
|
__get_user(vcol, &vtconsize->v_vcol);
|
| 927 |
|
|
__get_user(ccol, &vtconsize->v_ccol);
|
| 928 |
|
|
vlin = vlin ? vlin : vc->vc_scan_lines;
|
| 929 |
|
|
if (clin) {
|
| 930 |
|
|
if (ll) {
|
| 931 |
|
|
if (ll != vlin/clin)
|
| 932 |
|
|
return -EINVAL; /* Parameters don't add up */
|
| 933 |
|
|
} else
|
| 934 |
|
|
ll = vlin/clin;
|
| 935 |
|
|
}
|
| 936 |
|
|
if (vcol && ccol) {
|
| 937 |
|
|
if (cc) {
|
| 938 |
|
|
if (cc != vcol/ccol)
|
| 939 |
|
|
return -EINVAL;
|
| 940 |
|
|
} else
|
| 941 |
|
|
cc = vcol/ccol;
|
| 942 |
|
|
}
|
| 943 |
|
|
|
| 944 |
|
|
if (clin > 32)
|
| 945 |
|
|
return -EINVAL;
|
| 946 |
|
|
|
| 947 |
|
|
for (i = 0; i < MAX_NR_CONSOLES; i++) {
|
| 948 |
|
|
if (!vc_cons[i].d)
|
| 949 |
|
|
continue;
|
| 950 |
|
|
acquire_console_sem();
|
| 951 |
|
|
if (vlin)
|
| 952 |
|
|
vc_cons[i].d->vc_scan_lines = vlin;
|
| 953 |
|
|
if (clin)
|
| 954 |
|
|
vc_cons[i].d->vc_font.height = clin;
|
| 955 |
|
|
vc_cons[i].d->vc_resize_user = 1;
|
| 956 |
|
|
vc_resize(vc_cons[i].d, cc, ll);
|
| 957 |
|
|
release_console_sem();
|
| 958 |
|
|
}
|
| 959 |
|
|
return 0;
|
| 960 |
|
|
}
|
| 961 |
|
|
|
| 962 |
|
|
case PIO_FONT: {
|
| 963 |
|
|
if (!perm)
|
| 964 |
|
|
return -EPERM;
|
| 965 |
|
|
op.op = KD_FONT_OP_SET;
|
| 966 |
|
|
op.flags = KD_FONT_FLAG_OLD | KD_FONT_FLAG_DONT_RECALC; /* Compatibility */
|
| 967 |
|
|
op.width = 8;
|
| 968 |
|
|
op.height = 0;
|
| 969 |
|
|
op.charcount = 256;
|
| 970 |
|
|
op.data = up;
|
| 971 |
|
|
return con_font_op(vc_cons[fg_console].d, &op);
|
| 972 |
|
|
}
|
| 973 |
|
|
|
| 974 |
|
|
case GIO_FONT: {
|
| 975 |
|
|
op.op = KD_FONT_OP_GET;
|
| 976 |
|
|
op.flags = KD_FONT_FLAG_OLD;
|
| 977 |
|
|
op.width = 8;
|
| 978 |
|
|
op.height = 32;
|
| 979 |
|
|
op.charcount = 256;
|
| 980 |
|
|
op.data = up;
|
| 981 |
|
|
return con_font_op(vc_cons[fg_console].d, &op);
|
| 982 |
|
|
}
|
| 983 |
|
|
|
| 984 |
|
|
case PIO_CMAP:
|
| 985 |
|
|
if (!perm)
|
| 986 |
|
|
return -EPERM;
|
| 987 |
|
|
return con_set_cmap(up);
|
| 988 |
|
|
|
| 989 |
|
|
case GIO_CMAP:
|
| 990 |
|
|
return con_get_cmap(up);
|
| 991 |
|
|
|
| 992 |
|
|
case PIO_FONTX:
|
| 993 |
|
|
case GIO_FONTX:
|
| 994 |
|
|
return do_fontx_ioctl(cmd, up, perm, &op);
|
| 995 |
|
|
|
| 996 |
|
|
case PIO_FONTRESET:
|
| 997 |
|
|
{
|
| 998 |
|
|
if (!perm)
|
| 999 |
|
|
return -EPERM;
|
| 1000 |
|
|
|
| 1001 |
|
|
#ifdef BROKEN_GRAPHICS_PROGRAMS
|
| 1002 |
|
|
/* With BROKEN_GRAPHICS_PROGRAMS defined, the default
|
| 1003 |
|
|
font is not saved. */
|
| 1004 |
|
|
return -ENOSYS;
|
| 1005 |
|
|
#else
|
| 1006 |
|
|
{
|
| 1007 |
|
|
op.op = KD_FONT_OP_SET_DEFAULT;
|
| 1008 |
|
|
op.data = NULL;
|
| 1009 |
|
|
i = con_font_op(vc_cons[fg_console].d, &op);
|
| 1010 |
|
|
if (i)
|
| 1011 |
|
|
return i;
|
| 1012 |
|
|
con_set_default_unimap(vc_cons[fg_console].d);
|
| 1013 |
|
|
return 0;
|
| 1014 |
|
|
}
|
| 1015 |
|
|
#endif
|
| 1016 |
|
|
}
|
| 1017 |
|
|
|
| 1018 |
|
|
case KDFONTOP: {
|
| 1019 |
|
|
if (copy_from_user(&op, up, sizeof(op)))
|
| 1020 |
|
|
return -EFAULT;
|
| 1021 |
|
|
if (!perm && op.op != KD_FONT_OP_GET)
|
| 1022 |
|
|
return -EPERM;
|
| 1023 |
|
|
i = con_font_op(vc, &op);
|
| 1024 |
|
|
if (i) return i;
|
| 1025 |
|
|
if (copy_to_user(up, &op, sizeof(op)))
|
| 1026 |
|
|
return -EFAULT;
|
| 1027 |
|
|
return 0;
|
| 1028 |
|
|
}
|
| 1029 |
|
|
|
| 1030 |
|
|
case PIO_SCRNMAP:
|
| 1031 |
|
|
if (!perm)
|
| 1032 |
|
|
return -EPERM;
|
| 1033 |
|
|
return con_set_trans_old(up);
|
| 1034 |
|
|
|
| 1035 |
|
|
case GIO_SCRNMAP:
|
| 1036 |
|
|
return con_get_trans_old(up);
|
| 1037 |
|
|
|
| 1038 |
|
|
case PIO_UNISCRNMAP:
|
| 1039 |
|
|
if (!perm)
|
| 1040 |
|
|
return -EPERM;
|
| 1041 |
|
|
return con_set_trans_new(up);
|
| 1042 |
|
|
|
| 1043 |
|
|
case GIO_UNISCRNMAP:
|
| 1044 |
|
|
return con_get_trans_new(up);
|
| 1045 |
|
|
|
| 1046 |
|
|
case PIO_UNIMAPCLR:
|
| 1047 |
|
|
{ struct unimapinit ui;
|
| 1048 |
|
|
if (!perm)
|
| 1049 |
|
|
return -EPERM;
|
| 1050 |
|
|
i = copy_from_user(&ui, up, sizeof(struct unimapinit));
|
| 1051 |
|
|
if (i) return -EFAULT;
|
| 1052 |
|
|
con_clear_unimap(vc, &ui);
|
| 1053 |
|
|
return 0;
|
| 1054 |
|
|
}
|
| 1055 |
|
|
|
| 1056 |
|
|
case PIO_UNIMAP:
|
| 1057 |
|
|
case GIO_UNIMAP:
|
| 1058 |
|
|
return do_unimap_ioctl(cmd, up, perm, vc);
|
| 1059 |
|
|
|
| 1060 |
|
|
case VT_LOCKSWITCH:
|
| 1061 |
|
|
if (!capable(CAP_SYS_TTY_CONFIG))
|
| 1062 |
|
|
return -EPERM;
|
| 1063 |
|
|
vt_dont_switch = 1;
|
| 1064 |
|
|
return 0;
|
| 1065 |
|
|
case VT_UNLOCKSWITCH:
|
| 1066 |
|
|
if (!capable(CAP_SYS_TTY_CONFIG))
|
| 1067 |
|
|
return -EPERM;
|
| 1068 |
|
|
vt_dont_switch = 0;
|
| 1069 |
|
|
return 0;
|
| 1070 |
|
|
case VT_GETHIFONTMASK:
|
| 1071 |
|
|
return put_user(vc->vc_hi_font_mask, (unsigned short __user *)arg);
|
| 1072 |
|
|
default:
|
| 1073 |
|
|
return -ENOIOCTLCMD;
|
| 1074 |
|
|
}
|
| 1075 |
|
|
}
|
| 1076 |
|
|
|
| 1077 |
|
|
/*
|
| 1078 |
|
|
* Sometimes we want to wait until a particular VT has been activated. We
|
| 1079 |
|
|
* do it in a very simple manner. Everybody waits on a single queue and
|
| 1080 |
|
|
* get woken up at once. Those that are satisfied go on with their business,
|
| 1081 |
|
|
* while those not ready go back to sleep. Seems overkill to add a wait
|
| 1082 |
|
|
* to each vt just for this - usually this does nothing!
|
| 1083 |
|
|
*/
|
| 1084 |
|
|
static DECLARE_WAIT_QUEUE_HEAD(vt_activate_queue);
|
| 1085 |
|
|
|
| 1086 |
|
|
/*
|
| 1087 |
|
|
* Sleeps until a vt is activated, or the task is interrupted. Returns
|
| 1088 |
|
|
* 0 if activation, -EINTR if interrupted by a signal handler.
|
| 1089 |
|
|
*/
|
| 1090 |
|
|
int vt_waitactive(int vt)
|
| 1091 |
|
|
{
|
| 1092 |
|
|
int retval;
|
| 1093 |
|
|
DECLARE_WAITQUEUE(wait, current);
|
| 1094 |
|
|
|
| 1095 |
|
|
add_wait_queue(&vt_activate_queue, &wait);
|
| 1096 |
|
|
for (;;) {
|
| 1097 |
|
|
retval = 0;
|
| 1098 |
|
|
|
| 1099 |
|
|
/*
|
| 1100 |
|
|
* Synchronize with redraw_screen(). By acquiring the console
|
| 1101 |
|
|
* semaphore we make sure that the console switch is completed
|
| 1102 |
|
|
* before we return. If we didn't wait for the semaphore, we
|
| 1103 |
|
|
* could return at a point where fg_console has already been
|
| 1104 |
|
|
* updated, but the console switch hasn't been completed.
|
| 1105 |
|
|
*/
|
| 1106 |
|
|
acquire_console_sem();
|
| 1107 |
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
| 1108 |
|
|
if (vt == fg_console) {
|
| 1109 |
|
|
release_console_sem();
|
| 1110 |
|
|
break;
|
| 1111 |
|
|
}
|
| 1112 |
|
|
release_console_sem();
|
| 1113 |
|
|
retval = -ERESTARTNOHAND;
|
| 1114 |
|
|
if (signal_pending(current))
|
| 1115 |
|
|
break;
|
| 1116 |
|
|
schedule();
|
| 1117 |
|
|
}
|
| 1118 |
|
|
remove_wait_queue(&vt_activate_queue, &wait);
|
| 1119 |
|
|
__set_current_state(TASK_RUNNING);
|
| 1120 |
|
|
return retval;
|
| 1121 |
|
|
}
|
| 1122 |
|
|
|
| 1123 |
|
|
#define vt_wake_waitactive() wake_up(&vt_activate_queue)
|
| 1124 |
|
|
|
| 1125 |
|
|
void reset_vc(struct vc_data *vc)
|
| 1126 |
|
|
{
|
| 1127 |
|
|
vc->vc_mode = KD_TEXT;
|
| 1128 |
|
|
kbd_table[vc->vc_num].kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE;
|
| 1129 |
|
|
vc->vt_mode.mode = VT_AUTO;
|
| 1130 |
|
|
vc->vt_mode.waitv = 0;
|
| 1131 |
|
|
vc->vt_mode.relsig = 0;
|
| 1132 |
|
|
vc->vt_mode.acqsig = 0;
|
| 1133 |
|
|
vc->vt_mode.frsig = 0;
|
| 1134 |
|
|
put_pid(vc->vt_pid);
|
| 1135 |
|
|
vc->vt_pid = NULL;
|
| 1136 |
|
|
vc->vt_newvt = -1;
|
| 1137 |
|
|
if (!in_interrupt()) /* Via keyboard.c:SAK() - akpm */
|
| 1138 |
|
|
reset_palette(vc);
|
| 1139 |
|
|
}
|
| 1140 |
|
|
|
| 1141 |
|
|
void vc_SAK(struct work_struct *work)
|
| 1142 |
|
|
{
|
| 1143 |
|
|
struct vc *vc_con =
|
| 1144 |
|
|
container_of(work, struct vc, SAK_work);
|
| 1145 |
|
|
struct vc_data *vc;
|
| 1146 |
|
|
struct tty_struct *tty;
|
| 1147 |
|
|
|
| 1148 |
|
|
acquire_console_sem();
|
| 1149 |
|
|
vc = vc_con->d;
|
| 1150 |
|
|
if (vc) {
|
| 1151 |
|
|
tty = vc->vc_tty;
|
| 1152 |
|
|
/*
|
| 1153 |
|
|
* SAK should also work in all raw modes and reset
|
| 1154 |
|
|
* them properly.
|
| 1155 |
|
|
*/
|
| 1156 |
|
|
if (tty)
|
| 1157 |
|
|
__do_SAK(tty);
|
| 1158 |
|
|
reset_vc(vc);
|
| 1159 |
|
|
}
|
| 1160 |
|
|
release_console_sem();
|
| 1161 |
|
|
}
|
| 1162 |
|
|
|
| 1163 |
|
|
/*
|
| 1164 |
|
|
* Performs the back end of a vt switch
|
| 1165 |
|
|
*/
|
| 1166 |
|
|
static void complete_change_console(struct vc_data *vc)
|
| 1167 |
|
|
{
|
| 1168 |
|
|
unsigned char old_vc_mode;
|
| 1169 |
|
|
|
| 1170 |
|
|
last_console = fg_console;
|
| 1171 |
|
|
|
| 1172 |
|
|
/*
|
| 1173 |
|
|
* If we're switching, we could be going from KD_GRAPHICS to
|
| 1174 |
|
|
* KD_TEXT mode or vice versa, which means we need to blank or
|
| 1175 |
|
|
* unblank the screen later.
|
| 1176 |
|
|
*/
|
| 1177 |
|
|
old_vc_mode = vc_cons[fg_console].d->vc_mode;
|
| 1178 |
|
|
switch_screen(vc);
|
| 1179 |
|
|
|
| 1180 |
|
|
/*
|
| 1181 |
|
|
* This can't appear below a successful kill_pid(). If it did,
|
| 1182 |
|
|
* then the *blank_screen operation could occur while X, having
|
| 1183 |
|
|
* received acqsig, is waking up on another processor. This
|
| 1184 |
|
|
* condition can lead to overlapping accesses to the VGA range
|
| 1185 |
|
|
* and the framebuffer (causing system lockups).
|
| 1186 |
|
|
*
|
| 1187 |
|
|
* To account for this we duplicate this code below only if the
|
| 1188 |
|
|
* controlling process is gone and we've called reset_vc.
|
| 1189 |
|
|
*/
|
| 1190 |
|
|
if (old_vc_mode != vc->vc_mode) {
|
| 1191 |
|
|
if (vc->vc_mode == KD_TEXT)
|
| 1192 |
|
|
do_unblank_screen(1);
|
| 1193 |
|
|
else
|
| 1194 |
|
|
do_blank_screen(1);
|
| 1195 |
|
|
}
|
| 1196 |
|
|
|
| 1197 |
|
|
/*
|
| 1198 |
|
|
* If this new console is under process control, send it a signal
|
| 1199 |
|
|
* telling it that it has acquired. Also check if it has died and
|
| 1200 |
|
|
* clean up (similar to logic employed in change_console())
|
| 1201 |
|
|
*/
|
| 1202 |
|
|
if (vc->vt_mode.mode == VT_PROCESS) {
|
| 1203 |
|
|
/*
|
| 1204 |
|
|
* Send the signal as privileged - kill_pid() will
|
| 1205 |
|
|
* tell us if the process has gone or something else
|
| 1206 |
|
|
* is awry
|
| 1207 |
|
|
*/
|
| 1208 |
|
|
if (kill_pid(vc->vt_pid, vc->vt_mode.acqsig, 1) != 0) {
|
| 1209 |
|
|
/*
|
| 1210 |
|
|
* The controlling process has died, so we revert back to
|
| 1211 |
|
|
* normal operation. In this case, we'll also change back
|
| 1212 |
|
|
* to KD_TEXT mode. I'm not sure if this is strictly correct
|
| 1213 |
|
|
* but it saves the agony when the X server dies and the screen
|
| 1214 |
|
|
* remains blanked due to KD_GRAPHICS! It would be nice to do
|
| 1215 |
|
|
* this outside of VT_PROCESS but there is no single process
|
| 1216 |
|
|
* to account for and tracking tty count may be undesirable.
|
| 1217 |
|
|
*/
|
| 1218 |
|
|
reset_vc(vc);
|
| 1219 |
|
|
|
| 1220 |
|
|
if (old_vc_mode != vc->vc_mode) {
|
| 1221 |
|
|
if (vc->vc_mode == KD_TEXT)
|
| 1222 |
|
|
do_unblank_screen(1);
|
| 1223 |
|
|
else
|
| 1224 |
|
|
do_blank_screen(1);
|
| 1225 |
|
|
}
|
| 1226 |
|
|
}
|
| 1227 |
|
|
}
|
| 1228 |
|
|
|
| 1229 |
|
|
/*
|
| 1230 |
|
|
* Wake anyone waiting for their VT to activate
|
| 1231 |
|
|
*/
|
| 1232 |
|
|
vt_wake_waitactive();
|
| 1233 |
|
|
return;
|
| 1234 |
|
|
}
|
| 1235 |
|
|
|
| 1236 |
|
|
/*
|
| 1237 |
|
|
* Performs the front-end of a vt switch
|
| 1238 |
|
|
*/
|
| 1239 |
|
|
void change_console(struct vc_data *new_vc)
|
| 1240 |
|
|
{
|
| 1241 |
|
|
struct vc_data *vc;
|
| 1242 |
|
|
|
| 1243 |
|
|
if (!new_vc || new_vc->vc_num == fg_console || vt_dont_switch)
|
| 1244 |
|
|
return;
|
| 1245 |
|
|
|
| 1246 |
|
|
/*
|
| 1247 |
|
|
* If this vt is in process mode, then we need to handshake with
|
| 1248 |
|
|
* that process before switching. Essentially, we store where that
|
| 1249 |
|
|
* vt wants to switch to and wait for it to tell us when it's done
|
| 1250 |
|
|
* (via VT_RELDISP ioctl).
|
| 1251 |
|
|
*
|
| 1252 |
|
|
* We also check to see if the controlling process still exists.
|
| 1253 |
|
|
* If it doesn't, we reset this vt to auto mode and continue.
|
| 1254 |
|
|
* This is a cheap way to track process control. The worst thing
|
| 1255 |
|
|
* that can happen is: we send a signal to a process, it dies, and
|
| 1256 |
|
|
* the switch gets "lost" waiting for a response; hopefully, the
|
| 1257 |
|
|
* user will try again, we'll detect the process is gone (unless
|
| 1258 |
|
|
* the user waits just the right amount of time :-) and revert the
|
| 1259 |
|
|
* vt to auto control.
|
| 1260 |
|
|
*/
|
| 1261 |
|
|
vc = vc_cons[fg_console].d;
|
| 1262 |
|
|
if (vc->vt_mode.mode == VT_PROCESS) {
|
| 1263 |
|
|
/*
|
| 1264 |
|
|
* Send the signal as privileged - kill_pid() will
|
| 1265 |
|
|
* tell us if the process has gone or something else
|
| 1266 |
|
|
* is awry.
|
| 1267 |
|
|
*
|
| 1268 |
|
|
* We need to set vt_newvt *before* sending the signal or we
|
| 1269 |
|
|
* have a race.
|
| 1270 |
|
|
*/
|
| 1271 |
|
|
vc->vt_newvt = new_vc->vc_num;
|
| 1272 |
|
|
if (kill_pid(vc->vt_pid, vc->vt_mode.relsig, 1) == 0) {
|
| 1273 |
|
|
/*
|
| 1274 |
|
|
* It worked. Mark the vt to switch to and
|
| 1275 |
|
|
* return. The process needs to send us a
|
| 1276 |
|
|
* VT_RELDISP ioctl to complete the switch.
|
| 1277 |
|
|
*/
|
| 1278 |
|
|
return;
|
| 1279 |
|
|
}
|
| 1280 |
|
|
|
| 1281 |
|
|
/*
|
| 1282 |
|
|
* The controlling process has died, so we revert back to
|
| 1283 |
|
|
* normal operation. In this case, we'll also change back
|
| 1284 |
|
|
* to KD_TEXT mode. I'm not sure if this is strictly correct
|
| 1285 |
|
|
* but it saves the agony when the X server dies and the screen
|
| 1286 |
|
|
* remains blanked due to KD_GRAPHICS! It would be nice to do
|
| 1287 |
|
|
* this outside of VT_PROCESS but there is no single process
|
| 1288 |
|
|
* to account for and tracking tty count may be undesirable.
|
| 1289 |
|
|
*/
|
| 1290 |
|
|
reset_vc(vc);
|
| 1291 |
|
|
|
| 1292 |
|
|
/*
|
| 1293 |
|
|
* Fall through to normal (VT_AUTO) handling of the switch...
|
| 1294 |
|
|
*/
|
| 1295 |
|
|
}
|
| 1296 |
|
|
|
| 1297 |
|
|
/*
|
| 1298 |
|
|
* Ignore all switches in KD_GRAPHICS+VT_AUTO mode
|
| 1299 |
|
|
*/
|
| 1300 |
|
|
if (vc->vc_mode == KD_GRAPHICS)
|
| 1301 |
|
|
return;
|
| 1302 |
|
|
|
| 1303 |
|
|
complete_change_console(new_vc);
|
| 1304 |
|
|
}
|
