/* * This module exports the functions: * * 'int set_selection(struct tiocl_selection __user *, struct tty_struct *)' * 'void clear_selection(void)' * 'int paste_selection(struct tty_struct *)' * 'int sel_loadlut(char __user *)' * * Now that /dev/vcs exists, most of this can disappear again. */ #include <linux/module.h>#include <linux/tty.h>#include <linux/sched.h>#include <linux/mm.h>#include <linux/slab.h>#include <linux/types.h> #include <asm/uaccess.h> #include <linux/kbd_kern.h>#include <linux/vt_kern.h>#include <linux/consolemap.h>#include <linux/selection.h>#include <linux/tiocl.h>#include <linux/console.h>#include <linux/tty_flip.h> /* Don't take this from <ctype.h>: 011-015 on the screen aren't spaces */#define isspace(c) ((c) == ' ') extern void poke_blanked_console(void); /* FIXME: all this needs locking *//* Variables for selection control. *//* Use a dynamic buffer, instead of static (Dec 1994) */struct vc_data *sel_cons; /* must not be deallocated */static int use_unicode;static volatile int sel_start = -1; /* cleared by clear_selection */static int sel_end;static int sel_buffer_lth;static char *sel_buffer; /* clear_selection, highlight and highlight_pointer can be called from interrupt (via scrollback/front) */ /* set reverse video on characters s-e of console with selection. */static inline void highlight(const int s, const int e){ invert_screen(sel_cons, s, e-s+2, 1);} /* use complementary color to show the pointer */static inline void highlight_pointer(const int where){ complement_pos(sel_cons, where);} static u16sel_pos(int n){ return inverse_translate(sel_cons, screen_glyph(sel_cons, n), use_unicode);} /** * clear_selection - remove current selection * * Remove the current selection highlight, if any from the console * holding the selection. The caller must hold the console lock. */void clear_selection(void){ highlight_pointer(-1); /* hide the pointer */ if (sel_start != -1) { highlight(sel_start, sel_end); sel_start = -1; }} /* * User settable table: what characters are to be considered alphabetic? * 256 bits. Locked by the console lock. */static u32 inwordLut[8]={ 0x00000000, /* control chars */ 0x03FF0000, /* digits */ 0x87FFFFFE, /* uppercase and '_' */ 0x07FFFFFE, /* lowercase */ 0x00000000, 0x00000000, 0xFF7FFFFF, /* latin-1 accented letters, not multiplication sign */ 0xFF7FFFFF /* latin-1 accented letters, not division sign */}; static inline int inword(const u16 c) { return c > 0xff || (( inwordLut[c>>5] >> (c & 0x1F) ) & 1);} /** * set loadlut - load the LUT table * @p: user table * * Load the LUT table from user space. The caller must hold the console * lock. Make a temporary copy so a partial update doesn't make a mess. */int sel_loadlut(char __user *p){ u32 tmplut[8]; if (copy_from_user(tmplut, (u32 __user *)(p+4), 32)) return -EFAULT; memcpy(inwordLut, tmplut, 32); return 0;} /* does screen address p correspond to character at LH/RH edge of screen? */static inline int atedge(const int p, int size_row){ return (!(p % size_row) || !((p + 2) % size_row));} /* constrain v such that v <= u */static inline unsigned short limit(const unsigned short v, const unsigned short u){ return (v > u) ? u : v;} /* stores the char in UTF8 and returns the number of bytes used (1-3) */static int store_utf8(u16 c, char *p){ if (c < 0x80) { /* 0******* */ p[0] = c; return 1; } else if (c < 0x800) { /* 110***** 10****** */ p[0] = 0xc0 | (c >> 6); p[1] = 0x80 | (c & 0x3f); return 2; } else { /* 1110**** 10****** 10****** */ p[0] = 0xe0 | (c >> 12); p[1] = 0x80 | ((c >> 6) & 0x3f); p[2] = 0x80 | (c & 0x3f); return 3; }} /** * set_selection - set the current selection. * @sel: user selection info * @tty: the console tty * * Invoked by the ioctl handle for the vt layer. * * The entire selection process is managed under the console_lock. It's * a lot under the lock but its hardly a performance path */int set_selection(const struct tiocl_selection __user *sel, struct tty_struct *tty){ struct vc_data *vc = vc_cons[fg_console].d; int sel_mode, new_sel_start, new_sel_end, spc; char *bp, *obp; int i, ps, pe, multiplier; u16 c; int mode; poke_blanked_console(); { unsigned short xs, ys, xe, ye; if (!access_ok(VERIFY_READ, sel, sizeof(*sel))) return -EFAULT; __get_user(xs, &sel->xs); __get_user(ys, &sel->ys); __get_user(xe, &sel->xe); __get_user(ye, &sel->ye); __get_user(sel_mode, &sel->sel_mode); xs--; ys--; xe--; ye--; xs = limit(xs, vc->vc_cols - 1); ys = limit(ys, vc->vc_rows - 1); xe = limit(xe, vc->vc_cols - 1); ye = limit(ye, vc->vc_rows - 1); ps = ys * vc->vc_size_row + (xs << 1); pe = ye * vc->vc_size_row + (xe << 1); if (sel_mode == TIOCL_SELCLEAR) { /* useful for screendump without selection highlights */ clear_selection(); return 0; } if (mouse_reporting() && (sel_mode & TIOCL_SELMOUSEREPORT)) { mouse_report(tty, sel_mode & TIOCL_SELBUTTONMASK, xs, ys); return 0; } } if (ps > pe) /* make sel_start <= sel_end */ { int tmp = ps; ps = pe; pe = tmp; } if (sel_cons != vc_cons[fg_console].d) { clear_selection(); sel_cons = vc_cons[fg_console].d; } mode = vt_do_kdgkbmode(fg_console); if (mode == K_UNICODE) use_unicode = 1; else use_unicode = 0; switch (sel_mode) { case TIOCL_SELCHAR: /* character-by-character selection */ new_sel_start = ps; new_sel_end = pe; break; case TIOCL_SELWORD: /* word-by-word selection */ spc = isspace(sel_pos(ps)); for (new_sel_start = ps; ; ps -= 2) { if ((spc && !isspace(sel_pos(ps))) || (!spc && !inword(sel_pos(ps)))) break; new_sel_start = ps; if (!(ps % vc->vc_size_row)) break; } spc = isspace(sel_pos(pe)); for (new_sel_end = pe; ; pe += 2) { if ((spc && !isspace(sel_pos(pe))) || (!spc && !inword(sel_pos(pe)))) break; new_sel_end = pe; if (!((pe + 2) % vc->vc_size_row)) break; } break; case TIOCL_SELLINE: /* line-by-line selection */ new_sel_start = ps - ps % vc->vc_size_row; new_sel_end = pe + vc->vc_size_row - pe % vc->vc_size_row - 2; break; case TIOCL_SELPOINTER: highlight_pointer(pe); return 0; default: return -EINVAL; } /* remove the pointer */ highlight_pointer(-1); /* select to end of line if on trailing space */ if (new_sel_end > new_sel_start && !atedge(new_sel_end, vc->vc_size_row) && isspace(sel_pos(new_sel_end))) { for (pe = new_sel_end + 2; ; pe += 2) if (!isspace(sel_pos(pe)) || atedge(pe, vc->vc_size_row)) break; if (isspace(sel_pos(pe))) new_sel_end = pe; } if (sel_start == -1) /* no current selection */ highlight(new_sel_start, new_sel_end); else if (new_sel_start == sel_start) { if (new_sel_end == sel_end) /* no action required */ return 0; else if (new_sel_end > sel_end) /* extend to right */ highlight(sel_end + 2, new_sel_end); else /* contract from right */ highlight(new_sel_end + 2, sel_end); } else if (new_sel_end == sel_end) { if (new_sel_start < sel_start) /* extend to left */ highlight(new_sel_start, sel_start - 2); else /* contract from left */ highlight(sel_start, new_sel_start - 2); } else /* some other case; start selection from scratch */ { clear_selection(); highlight(new_sel_start, new_sel_end); } sel_start = new_sel_start; sel_end = new_sel_end; /* Allocate a new buffer before freeing the old one ... */ multiplier = use_unicode ? 3 : 1; /* chars can take up to 3 bytes */ bp = kmalloc(((sel_end-sel_start)/2+1)*multiplier, GFP_KERNEL); if (!bp) { printk(KERN_WARNING "selection: kmalloc() failed\n"); clear_selection(); return -ENOMEM; } kfree(sel_buffer); sel_buffer = bp; obp = bp; for (i = sel_start; i <= sel_end; i += 2) { c = sel_pos(i); if (use_unicode) bp += store_utf8(c, bp); else *bp++ = c; if (!isspace(c)) obp = bp; if (! ((i + 2) % vc->vc_size_row)) { /* strip trailing blanks from line and add newline, unless non-space at end of line. */ if (obp != bp) { bp = obp; *bp++ = '\r'; } obp = bp; } } sel_buffer_lth = bp - sel_buffer; return 0;} /* Insert the contents of the selection buffer into the * queue of the tty associated with the current console. * Invoked by ioctl(). * * Locking: called without locks. Calls the ldisc wrongly with * unsafe methods, */int paste_selection(struct tty_struct *tty){ struct vc_data *vc = tty->driver_data; int pasted = 0; unsigned int count; struct tty_ldisc *ld; DECLARE_WAITQUEUE(wait, current); console_lock(); poke_blanked_console(); console_unlock(); ld = tty_ldisc_ref_wait(tty); tty_buffer_lock_exclusive(&vc->port); add_wait_queue(&vc->paste_wait, &wait); while (sel_buffer && sel_buffer_lth > pasted) { set_current_state(TASK_INTERRUPTIBLE); if (test_bit(TTY_THROTTLED, &tty->flags)) { schedule(); continue; } count = sel_buffer_lth - pasted; count = tty_ldisc_receive_buf(ld, sel_buffer + pasted, NULL, count); pasted += count; } remove_wait_queue(&vc->paste_wait, &wait); __set_current_state(TASK_RUNNING); tty_buffer_unlock_exclusive(&vc->port); tty_ldisc_deref(ld); return 0;}
/*
* This module exports the functions:
*
* 'int set_selection(struct tiocl_selection __user *, struct tty_struct *)'
* 'void clear_selection(void)'
* 'int paste_selection(struct tty_struct *)'
* 'int sel_loadlut(char __user *)'
*
* Now that /dev/vcs exists, most of this can disappear again.
*/
#include <linux/module.h>
#include <linux/tty.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <asm/uaccess.h>
#include <linux/kbd_kern.h>
#include <linux/vt_kern.h>
#include <linux/consolemap.h>
#include <linux/selection.h>
#include <linux/tiocl.h>
#include <linux/console.h>
#include <linux/tty_flip.h>
/* Don't take this from <ctype.h>: 011-015 on the screen aren't spaces */
#define isspace(c) ((c) == ' ')
extern void poke_blanked_console(void);
/* FIXME: all this needs locking */
/* Variables for selection control. */
/* Use a dynamic buffer, instead of static (Dec 1994) */
struct vc_data *sel_cons; /* must not be deallocated */
static int use_unicode;
static volatile int sel_start = -1; /* cleared by clear_selection */
static int sel_end;
static int sel_buffer_lth;
static char *sel_buffer;
/* clear_selection, highlight and highlight_pointer can be called
from interrupt (via scrollback/front) */
/* set reverse video on characters s-e of console with selection. */
static inline void highlight(const int s, const int e)
{
invert_screen(sel_cons, s, e-s+2, 1);
}
/* use complementary color to show the pointer */
static inline void highlight_pointer(const int where)
{
complement_pos(sel_cons, where);
}
static u16
sel_pos(int n)
{
return inverse_translate(sel_cons, screen_glyph(sel_cons, n),
use_unicode);
}
/**
* clear_selection - remove current selection
*
* Remove the current selection highlight, if any from the console
* holding the selection. The caller must hold the console lock.
*/
void clear_selection(void)
{
highlight_pointer(-1); /* hide the pointer */
if (sel_start != -1) {
highlight(sel_start, sel_end);
sel_start = -1;
}
}
/*
* User settable table: what characters are to be considered alphabetic?
* 256 bits. Locked by the console lock.
*/
static u32 inwordLut[8]={
0x00000000, /* control chars */
0x03FF0000, /* digits */
0x87FFFFFE, /* uppercase and '_' */
0x07FFFFFE, /* lowercase */
0x00000000,
0x00000000,
0xFF7FFFFF, /* latin-1 accented letters, not multiplication sign */
0xFF7FFFFF /* latin-1 accented letters, not division sign */
};
static inline int inword(const u16 c) {
return c > 0xff || (( inwordLut[c>>5] >> (c & 0x1F) ) & 1);
}
/**
* set loadlut - load the LUT table
* @p: user table
*
* Load the LUT table from user space. The caller must hold the console
* lock. Make a temporary copy so a partial update doesn't make a mess.
*/
int sel_loadlut(char __user *p)
{
u32 tmplut[8];
if (copy_from_user(tmplut, (u32 __user *)(p+4), 32))
return -EFAULT;
memcpy(inwordLut, tmplut, 32);
return 0;
}
/* does screen address p correspond to character at LH/RH edge of screen? */
static inline int atedge(const int p, int size_row)
{
return (!(p % size_row) || !((p + 2) % size_row));
}
/* constrain v such that v <= u */
static inline unsigned short limit(const unsigned short v, const unsigned short u)
{
return (v > u) ? u : v;
}
/* stores the char in UTF8 and returns the number of bytes used (1-3) */
static int store_utf8(u16 c, char *p)
{
if (c < 0x80) {
/* 0******* */
p[0] = c;
return 1;
} else if (c < 0x800) {
/* 110***** 10****** */
p[0] = 0xc0 | (c >> 6);
p[1] = 0x80 | (c & 0x3f);
return 2;
} else {
/* 1110**** 10****** 10****** */
p[0] = 0xe0 | (c >> 12);
p[1] = 0x80 | ((c >> 6) & 0x3f);
p[2] = 0x80 | (c & 0x3f);
return 3;
}
}
/**
* set_selection - set the current selection.
* @sel: user selection info
* @tty: the console tty
*
* Invoked by the ioctl handle for the vt layer.
*
* The entire selection process is managed under the console_lock. It's
* a lot under the lock but its hardly a performance path
*/
int set_selection(const struct tiocl_selection __user *sel, struct tty_struct *tty)
{
struct vc_data *vc = vc_cons[fg_console].d;
int sel_mode, new_sel_start, new_sel_end, spc;
char *bp, *obp;
int i, ps, pe, multiplier;
u16 c;
int mode;
poke_blanked_console();
{ unsigned short xs, ys, xe, ye;
if (!access_ok(VERIFY_READ, sel, sizeof(*sel)))
return -EFAULT;
__get_user(xs, &sel->xs);
__get_user(ys, &sel->ys);
__get_user(xe, &sel->xe);
__get_user(ye, &sel->ye);
__get_user(sel_mode, &sel->sel_mode);
xs--; ys--; xe--; ye--;
xs = limit(xs, vc->vc_cols - 1);
ys = limit(ys, vc->vc_rows - 1);
xe = limit(xe, vc->vc_cols - 1);
ye = limit(ye, vc->vc_rows - 1);
ps = ys * vc->vc_size_row + (xs << 1);
pe = ye * vc->vc_size_row + (xe << 1);
if (sel_mode == TIOCL_SELCLEAR) {
/* useful for screendump without selection highlights */
clear_selection();
return 0;
}
if (mouse_reporting() && (sel_mode & TIOCL_SELMOUSEREPORT)) {
mouse_report(tty, sel_mode & TIOCL_SELBUTTONMASK, xs, ys);
return 0;
}
}
if (ps > pe) /* make sel_start <= sel_end */
{
int tmp = ps;
ps = pe;
pe = tmp;
}
if (sel_cons != vc_cons[fg_console].d) {
clear_selection();
sel_cons = vc_cons[fg_console].d;
}
mode = vt_do_kdgkbmode(fg_console);
if (mode == K_UNICODE)
use_unicode = 1;
else
use_unicode = 0;
switch (sel_mode)
{
case TIOCL_SELCHAR: /* character-by-character selection */
new_sel_start = ps;
new_sel_end = pe;
break;
case TIOCL_SELWORD: /* word-by-word selection */
spc = isspace(sel_pos(ps));
for (new_sel_start = ps; ; ps -= 2)
{
if ((spc && !isspace(sel_pos(ps))) ||
(!spc && !inword(sel_pos(ps))))
break;
new_sel_start = ps;
if (!(ps % vc->vc_size_row))
break;
}
spc = isspace(sel_pos(pe));
for (new_sel_end = pe; ; pe += 2)
{
if ((spc && !isspace(sel_pos(pe))) ||
(!spc && !inword(sel_pos(pe))))
break;
new_sel_end = pe;
if (!((pe + 2) % vc->vc_size_row))
break;
}
break;
case TIOCL_SELLINE: /* line-by-line selection */
new_sel_start = ps - ps % vc->vc_size_row;
new_sel_end = pe + vc->vc_size_row
- pe % vc->vc_size_row - 2;
break;
case TIOCL_SELPOINTER:
highlight_pointer(pe);
return 0;
default:
return -EINVAL;
}
/* remove the pointer */
highlight_pointer(-1);
/* select to end of line if on trailing space */
if (new_sel_end > new_sel_start &&
!atedge(new_sel_end, vc->vc_size_row) &&
isspace(sel_pos(new_sel_end))) {
for (pe = new_sel_end + 2; ; pe += 2)
if (!isspace(sel_pos(pe)) ||
atedge(pe, vc->vc_size_row))
break;
if (isspace(sel_pos(pe)))
new_sel_end = pe;
}
if (sel_start == -1) /* no current selection */
highlight(new_sel_start, new_sel_end);
else if (new_sel_start == sel_start)
{
if (new_sel_end == sel_end) /* no action required */
return 0;
else if (new_sel_end > sel_end) /* extend to right */
highlight(sel_end + 2, new_sel_end);
else /* contract from right */
highlight(new_sel_end + 2, sel_end);
}
else if (new_sel_end == sel_end)
{
if (new_sel_start < sel_start) /* extend to left */
highlight(new_sel_start, sel_start - 2);
else /* contract from left */
highlight(sel_start, new_sel_start - 2);
}
else /* some other case; start selection from scratch */
{
clear_selection();
highlight(new_sel_start, new_sel_end);
}
sel_start = new_sel_start;
sel_end = new_sel_end;
/* Allocate a new buffer before freeing the old one ... */
multiplier = use_unicode ? 3 : 1; /* chars can take up to 3 bytes */
bp = kmalloc(((sel_end-sel_start)/2+1)*multiplier, GFP_KERNEL);
if (!bp) {
printk(KERN_WARNING "selection: kmalloc() failed\n");
clear_selection();
return -ENOMEM;
}
kfree(sel_buffer);
sel_buffer = bp;
obp = bp;
for (i = sel_start; i <= sel_end; i += 2) {
c = sel_pos(i);
if (use_unicode)
bp += store_utf8(c, bp);
else
*bp++ = c;
if (!isspace(c))
obp = bp;
if (! ((i + 2) % vc->vc_size_row)) {
/* strip trailing blanks from line and add newline,
unless non-space at end of line. */
if (obp != bp) {
bp = obp;
*bp++ = '\r';
}
obp = bp;
}
}
sel_buffer_lth = bp - sel_buffer;
return 0;
}
/* Insert the contents of the selection buffer into the
* queue of the tty associated with the current console.
* Invoked by ioctl().
*
* Locking: called without locks. Calls the ldisc wrongly with
* unsafe methods,
*/
int paste_selection(struct tty_struct *tty)
{
struct vc_data *vc = tty->driver_data;
int pasted = 0;
unsigned int count;
struct tty_ldisc *ld;
DECLARE_WAITQUEUE(wait, current);
console_lock();
poke_blanked_console();
console_unlock();
ld = tty_ldisc_ref_wait(tty);
tty_buffer_lock_exclusive(&vc->port);
add_wait_queue(&vc->paste_wait, &wait);
while (sel_buffer && sel_buffer_lth > pasted) {
set_current_state(TASK_INTERRUPTIBLE);
if (test_bit(TTY_THROTTLED, &tty->flags)) {
schedule();
continue;
}
count = sel_buffer_lth - pasted;
count = tty_ldisc_receive_buf(ld, sel_buffer + pasted, NULL,
count);
pasted += count;
}
remove_wait_queue(&vc->paste_wait, &wait);
__set_current_state(TASK_RUNNING);
tty_buffer_unlock_exclusive(&vc->port);
tty_ldisc_deref(ld);
return 0;
}