minix/usr.bin/msgc/msg_sys.def
Ben Gras 0b79eac642 mmap: accept non-PROT_WRITE MAP_SHARED mappings
Currently we don't accept writable file mmap()s, as there is no
system in place to guarantee dirty buffers would make it back to
disk. But we can actually accept MAP_SHARED for PROT_READ mappings,
meaning the ranges aren't writable at all (and no private copy is
made as with MAP_PRIVATE), as it turns out a fairly large class of
usage.

	. fail writable MAP_SHARED mappings at runtime
	. reduces some minix-specific patches
	. lets binutils gold build on minix without further patching

Change-Id: If2896c0a555328ac5b324afa706063fc6d86519e
2014-07-28 17:05:20 +02:00

604 lines
13 KiB
Modula-2

/* $NetBSD: msg_sys.def,v 1.41 2012/03/06 16:26:01 mbalmer Exp $ */
/*
* Copyright 1997 Piermont Information Systems Inc.
* All rights reserved.
*
* Written by Philip A. Nelson for Piermont Information Systems Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of Piermont Information Systems Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY PIERMONT INFORMATION SYSTEMS INC. ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL PIERMONT INFORMATION SYSTEMS INC. BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*
*/
static WINDOW *msg_win = NULL;
static char *cbuffer;
static size_t cbuffersize;
static int last_i_was_nl, last_i_was_space;
static int last_o_was_punct, last_o_was_space;
static void _msg_beep(void);
static int _msg_vprintf(int, const char *, va_list);
#define MSG_PROMPT_ECHO 1
#define MSG_PROMPT_HIDE_DFLT 2
static void _msg_vprompt(const char *, int, const char *, char *,
size_t, va_list);
static char *msgmap = MAP_FAILED;
static size_t msgmapsz;
static unsigned int msgmapcount;
/* Routines */
static void
_msg_beep(void)
{
fprintf(stderr, "\a");
}
WINDOW *
msg_window(WINDOW *window)
{
size_t ncbuffersize;
char *ncbuffer;
WINDOW *old;
old = msg_win;
if (!window)
return old;
msg_win = window;
ncbuffersize = getmaxx(window) * getmaxy(window) + 1;
while (ncbuffersize > cbuffersize) {
ncbuffer = malloc(ncbuffersize);
if (ncbuffer == NULL) {
/* we might get truncated messages... */
ncbuffersize <<= 1;
continue;
}
if (cbuffer != NULL)
free(cbuffer);
cbuffer = ncbuffer;
cbuffersize = ncbuffersize;
break;
}
last_o_was_punct = 0;
last_o_was_space = 1;
return old;
}
int
msg_file(const char *file)
{
int fd;
if (msgmap != MAP_FAILED)
munmap(msgmap, msgmapsz);
msgmap = MAP_FAILED;
if (!file)
return 0;
fd = open(file, O_RDONLY, 0);
if (fd == -1)
return -1;
msgmapsz = lseek(fd, 0, SEEK_END);
msgmap = mmap(0, msgmapsz, PROT_READ, MAP_SHARED, fd, 0);
close(fd);
if (msgmap == MAP_FAILED)
return -1;
/* check_magic */
if (strcmp(msgmap, "MSGTXTS") != 0) {
msg_file(NULL);
return -1;
}
msgmapcount = atoi(msgmap + 8);
return 0;
}
const char *
msg_string(msg msg_no)
{
uintptr_t m = (uintptr_t)msg_no;
if (m > sizeof msg_list / sizeof msg_list[0])
/* guess that we were passed a text string */
return msg_no;
if (msgmap != MAP_FAILED && m != 0 && m <= msgmapcount) {
unsigned int offset = atoi(msgmap + 8 + 8 * m);
if (offset != 0 && offset < msgmapsz)
return msgmap + offset;
}
return msg_list[m];
}
void
msg_clear(void)
{
wclear(msg_win);
last_o_was_punct = 0;
last_o_was_space = 1;
}
void
msg_standout(void)
{
wstandout(msg_win);
}
void
msg_standend(void)
{
wstandend(msg_win);
}
static int
_msg_vprintf(int auto_fill, const char *fmt, va_list ap)
{
const char *wstart, *afterw;
int wordlen, nspaces;
int ret;
ret = vsnprintf(cbuffer, cbuffersize, fmt, ap);
if (!auto_fill) {
waddstr(msg_win, cbuffer);
/*
* nothing is perfect if they flow text after a table,
* but this may be decent.
*/
last_i_was_nl = last_i_was_space = 1;
last_o_was_punct = 0;
last_o_was_space = 1;
goto out;
}
for (wstart = afterw = cbuffer; *wstart; wstart = afterw) {
/* eat one space, or a whole word of non-spaces */
if (isspace((unsigned char)*afterw))
afterw++;
else
while (*afterw && !isspace((unsigned char)*afterw))
afterw++;
/* this is an nl: special formatting necessary */
if (*wstart == '\n') {
if (last_i_was_nl || last_i_was_space) {
if (getcurx(msg_win) != 0)
waddch(msg_win, '\n');
if (last_i_was_nl) {
/* last was an nl: paragraph break */
waddch(msg_win, '\n');
} else {
/* last was space: line break */
}
last_o_was_punct = 0;
last_o_was_space = 1;
} else {
/* last_o_was_punct unchanged */
/* last_o_was_space unchanged */
}
last_i_was_space = 1;
last_i_was_nl = 1;
continue;
}
/* this is a tab: special formatting necessary. */
if (*wstart == '\t') {
if (last_i_was_nl) {
/* last was an nl: list indent */
if (getcurx(msg_win) != 0)
waddch(msg_win, '\n');
} else {
/* last was not an nl: columns */
}
waddch(msg_win, '\t');
last_i_was_nl = 0;
last_i_was_space = 1;
last_o_was_punct = 0;
last_o_was_space = 1;
continue;
}
/* this is a space: ignore it but set flags */
last_i_was_nl = 0; /* all newlines handled above */
last_i_was_space = isspace((unsigned char)*wstart);
if (last_i_was_space)
continue;
/*
* we have a real "word," i.e. a sequence of non-space
* characters. wstart is now the start of the word,
* afterw is the next character after the end.
*/
wordlen = afterw - wstart;
nspaces = last_o_was_space ? 0 : (last_o_was_punct ? 2 : 1);
if ((getcurx(msg_win) + nspaces + wordlen) >=
getmaxx(msg_win) &&
wordlen < (getmaxx(msg_win) / 3)) {
/* wrap the line */
waddch(msg_win, '\n');
nspaces = 0;
}
/* output the word, preceded by spaces if necessary */
while (nspaces-- > 0)
waddch(msg_win, ' ');
waddbytes(msg_win, wstart, wordlen);
/* set up the 'last' state for the next time around */
switch (afterw[-1]) {
case '.':
case '?':
case '!':
last_o_was_punct = 1;
break;
default:
last_o_was_punct = 0;
break;
}
last_o_was_space = 0;
/* ... and do it all again! */
}
/* String ended with a newline. They really want a line break. */
if (last_i_was_nl) {
if (getcurx(msg_win) != 0)
waddch(msg_win, '\n');
last_o_was_punct = 0;
last_o_was_space = 1;
}
out:
wrefresh(msg_win);
return ret;
}
void
msg_display(msg msg_no, ...)
{
va_list ap;
msg_clear();
va_start(ap, msg_no);
(void)_msg_vprintf(1, msg_string(msg_no), ap);
va_end(ap);
}
void
msg_display_add(msg msg_no, ...)
{
va_list ap;
va_start(ap, msg_no);
(void)_msg_vprintf(1, msg_string(msg_no), ap);
va_end(ap);
}
void
msg_printf(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
(void)_msg_vprintf(1, fmt, ap);
va_end(ap);
}
static void
_msg_vprompt(const char *fmt, int flags, const char *def, char *val,
size_t val_buf_len, va_list ap)
{
int ch;
int len, pos, npos, off;
int first;
int txt_y, txt_x;
char *ibuf;
int maxx;
if (val == NULL || val_buf_len == 0) {
/* No answer wanted */
val = NULL;
val_buf_len = 1;
}
ibuf = malloc(val_buf_len);
keypad(msg_win, TRUE);
_msg_vprintf(0, fmt, ap);
ibuf[0] = 0;
if (def != NULL && *def) {
if (flags & MSG_PROMPT_HIDE_DFLT)
strlcpy(ibuf, def, val_buf_len);
else {
waddstr(msg_win, " [");
waddstr(msg_win, def);
waddstr(msg_win, "]");
}
}
waddstr(msg_win, ": ");
len = strlen(ibuf);
pos = len;
getyx(msg_win, txt_y, txt_x);
maxx = getmaxx(msg_win) - txt_x - 1;
off = 0;
for (first = 1; ; first = 0) {
if (flags & MSG_PROMPT_ECHO) {
/* shift text right as we near the buffer start */
if (pos - off < 4)
off = pos - 4;
/* keep offset to a minimum if we are at the end */
if (pos == len)
off = pos - maxx;
if (off < 0 || len <= maxx)
off = 0;
/* shift text left as we near the buffer end */
npos = pos + 4;
if (npos > len)
npos = len;
if (npos - off > maxx)
off = npos - maxx;
/* calc. length to display */
npos = len - off;
if (npos > maxx)
npos = maxx;
mvwaddnstr(msg_win, txt_y, txt_x, ibuf + off, npos);
wclrtoeol(msg_win);
if (off != 0)
mvwaddstr(msg_win, txt_y, txt_x, "+");
wmove(msg_win, txt_y, txt_x + pos - off);
wrefresh(msg_win);
}
ch = wgetch(msg_win);
if (ch == '\n')
break;
switch (ch) {
case KEY_BACKSPACE:
case 'h' & 0x1f: case 0x7f: /* bs or del - delete left */
if (first) {
/* delete all of default string */
len = pos = 0;
break;
}
if (pos > 0) {
memmove(ibuf + pos - 1, ibuf + pos, len - pos);
len--;
pos--;
} else
_msg_beep();
break;
case 'u' & 0x1f: /* ^U; line kill */
/* kill line */
len = pos = 0;
break;
case 'w' & 0x1f: /* ^W; word kill */
/*
* word kill kills the spaces and the 'word'
* (non-spaces) last typed. the spaces before
* the 'word' aren't killed.
*/
npos = pos;
while (npos > 0 && isspace((unsigned char)ibuf[npos - 1]))
npos--;
while (npos > 0 && !isspace((unsigned char)ibuf[npos - 1]))
npos--;
memmove(ibuf + npos, ibuf + pos, len - pos);
len -= pos - npos;
pos = npos;
break;
case KEY_LEFT:
if (pos > 0)
pos--;
break;
case KEY_RIGHT:
if (len == 0 && pos == 0 && def != NULL) {
/* restore default! */
strlcpy(ibuf, def, val_buf_len);
len = pos = strlen(ibuf);
break;
}
if (pos < len)
pos++;
break;
default:
if (len < (int)(val_buf_len - 1) && isprint(ch)) {
memmove(ibuf + pos + 1, ibuf + pos, len - pos);
ibuf[pos++] = ch;
len++;
} else
_msg_beep();
break;
}
}
if (flags & MSG_PROMPT_ECHO) {
mvwaddch(msg_win, txt_y, txt_x + len - off, '\n');
last_o_was_punct = 0;
last_o_was_space = 1;
}
if (val != NULL) {
/* copy the appropriate string to the output */
if (len != 0 || flags & MSG_PROMPT_HIDE_DFLT) {
ibuf[len] = '\0';
strlcpy(val, ibuf, val_buf_len);
} else if (def != NULL && val != def) {
strlcpy(val, def, val_buf_len);
}
}
free(ibuf);
}
void
msg_prompt(msg msg_no, const char *def, char *val, size_t val_buf_len, ...)
{
va_list ap;
msg_clear();
va_start(ap, val_buf_len);
_msg_vprompt(msg_string(msg_no), MSG_PROMPT_ECHO,
def, val, val_buf_len, ap);
va_end(ap);
}
void
msg_prompt_win(msg msg_no, int x, int y, int w, int h,
const char *def, char *val, size_t val_buf_len, ...)
{
va_list ap;
WINDOW *win;
WINDOW *svmsg = NULL, *sv_win = NULL; /* XXX -Wuninitialized [many] */
int maxx, maxy;
int msg_flags = MSG_PROMPT_ECHO | MSG_PROMPT_HIDE_DFLT;
maxx = getmaxx(msg_win);
maxy = getmaxy(msg_win);
if (w == 0) {
va_start(ap, val_buf_len);
w = vsnprintf(NULL, 0, msg_string(msg_no), ap);
va_end(ap);
if (def != NULL && *def != 0 && w + (int)val_buf_len * 2 < maxx) {
w += 2 + strlen(def) + 1;
msg_flags &= ~MSG_PROMPT_HIDE_DFLT;
}
w += 1 + 2 + val_buf_len + 1;
if (w > maxx) {
if (!(msg_flags & MSG_PROMPT_HIDE_DFLT)) {
w -= 2 + strlen(def) + 1;
msg_flags |= MSG_PROMPT_HIDE_DFLT;
}
w = maxx;
}
}
if (x == -1)
x = (maxx - w) / 2 + 1;
if (h < 3)
h = 3;
if (y < 3)
y = (maxy - h) / 2;
if (y + h > maxy)
y = maxy - h;
win = subwin(msg_win, h, w, y, x);
if (win == NULL)
wprintw(msg_win, "msg_prompt_win: "
"newwin(%d, %d, %d, %d) failed\n",
h, w, y, x);
else {
/*
* Save screen contents from under our window
* Due to a mis-feature of NetBSD curses, curscr contains
* the data processed by doupdate() not that by wnoutrefresh().
* We must call doupdate() here to ensure we save the correct
* data. See PR 26660
*/
doupdate();
sv_win = dupwin(win);
if (sv_win)
overwrite(curscr, sv_win);
wbkgd(win, getbkgd(msg_win));
wattrset(win, getattrs(msg_win));
box(win, 0, 0);
wrefresh(win);
/* Change message window to be our little box */
svmsg = msg_window(subwin(msg_win, h - 2, w - 2, y + 1, x + 1));
wbkgd(msg_win, getbkgd(win));
wattrset(msg_win, getattrs(win));
msg_clear();
}
va_start(ap, val_buf_len);
_msg_vprompt(msg_string(msg_no), msg_flags, def, val, val_buf_len, ap);
va_end(ap);
if (win != NULL) {
wclear(win);
if (sv_win) {
/* Restore original screen contents */
overwrite(sv_win, win);
delwin(sv_win);
}
wnoutrefresh(win);
/* Restore normal message window */
delwin(msg_window(svmsg));
delwin(win);
}
}
void
msg_prompt_add(msg msg_no, const char *def, char *val, size_t val_buf_len, ...)
{
va_list ap;
va_start(ap, val_buf_len);
_msg_vprompt(msg_string(msg_no), MSG_PROMPT_ECHO, def, val, val_buf_len, ap);
va_end(ap);
}
void
msg_prompt_noecho(msg msg_no, const char *def, char *val, size_t val_buf_len, ...)
{
va_list ap;
msg_clear();
va_start(ap, val_buf_len);
_msg_vprompt(msg_string(msg_no), 0, def, val, val_buf_len, ap);
va_end(ap);
}
void
msg_table_add(msg msg_no, ...)
{
va_list ap;
va_start(ap, msg_no);
(void)_msg_vprintf(0, msg_string(msg_no), ap);
va_end(ap);
}
int
msg_row(void)
{
return getcury(msg_win) + getbegy(msg_win);
}