OpenSolaris_b135/lib/libxcurses/src/libc/xcurses/setup.c
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1995, by Sun Microsystems, Inc.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* setupterm.c
*
* XCurses Library
*
* Copyright 1990, 1995 by Mortice Kern Systems Inc. All rights reserved.
*
*/
#ifdef M_RCSID
#ifndef lint
static char const rcsID[] = "$Header: /rd/src/libc/xcurses/rcs/setup.c 1.9 1995/10/02 20:22:57 ant Exp $";
#endif
#endif
#include <private.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifdef M_USE_IOCTL_H
#include <sys/ioctl.h>
#endif
#include <ctype.h>
#include <fcntl.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
TERMINAL *cur_term;
/*
* Any version number should be placed in this file, since setupterm()
* must be called in order to initialize Curses or Terminfo.
*/
char __m_curses_version[] = M_CURSES_VERSION;
/* True if __m_setupterm() should use either the window settings from
* ioctl(), or the environment variables LINES and COLUMNS to override
* the terminfo database entries for 'lines' and 'columns'.
*
* Call use_env(flag) before either setupterm(), newterm(), or initscr().
*/
static bool use_environment = TRUE;
static char const e_terminal[] = "No memory for TERMINAL structure.\n";
static char const e_unknown[] = "\"%s\": Unknown terminal type.\n";
static char const e_pathmax[] = "\"%s\": terminfo database path too long.\n";
static char def_cr[] = "\r";
static char def_nl[] = "\n";
/*
* Take the real command character out of the CC environment variable
* and substitute it in for the prototype given in 'command_character'.
*/
static void
do_prototype()
{
int i, j;
char CC, proto;
CC = *__m_getenv("CC");
proto = *command_character;
for (i=0; i < __COUNT_STR; i++)
for(j = 0; cur_term->_str[i][j]; ++j)
if (cur_term->_str[i][j] == proto)
cur_term->_str[i][j] = CC;
}
#define min(a, b) ((a) < (b) ? (a) : (b))
/*
* Return a number from a terminfo file. Numbers in a terminfo
* file are stored as two bytes with low-high ordering.
*/
static short
getnum(fd)
int fd;
{
unsigned char bytes[2];
if (read(fd, bytes, 2) != 2)
return SHRT_MIN;
return (short) (bytes[0] + bytes[1] * 256);
}
/*f
* Read the compiled terminfo entry in the given file into the
* structure pointed to by ptr, allocating space for the string
* table and placing its address in ptr->str_table.
*/
int
__m_read_terminfo(filename, tp)
const char *filename;
TERMINAL *tp;
{
int fd;
short offset;
size_t i, len;
struct stat statbuf;
terminfo_header_t header;
unsigned char ch, bytebuf[2];
/* Get compiled terminfo file header. */
if ((fd = open(filename, 0)) < 0)
goto error_1;
if ((header.magic = getnum(fd)) != __TERMINFO_MAGIC
|| (header.name_size = getnum(fd)) < 0
|| (header.bool_count = getnum(fd)) < 0
|| (header.num_count = getnum(fd)) < 0
|| (header.str_count = getnum(fd)) < 0
|| (header.str_size = getnum(fd)) < 0)
goto error_2;
/* Allocate and fetch terminal names. */
len = min(127, header.name_size);
if ((tp->_names = (char *) malloc(len + 1)) == (char *) 0)
goto error_2;
if (read(fd, tp->_names, len) != len)
goto error_3;
tp->_names[len] = '\0';
if (127 < header.name_size)
(void) lseek(fd, (off_t) (header.name_size - 127), SEEK_CUR);
/* Fetch booleans. */
len = min(__COUNT_BOOL, header.bool_count);
if (read(fd, tp->_bool, len) != len)
goto error_3;
if (__COUNT_BOOL < header.bool_count) {
(void) lseek(
fd, (off_t) (header.bool_count - __COUNT_BOOL),
SEEK_CUR
);
} else {
for (len = header.bool_count; len < __COUNT_BOOL; ++len)
tp->_bool[len] = 0;
}
/* Eat padding byte. */
if ((header.name_size + header.bool_count) % 2 != 0)
(void) read(fd, &ch, sizeof ch);
/* Fetch numbers. */
len = min(__COUNT_NUM, header.num_count);
for (i = 0; i < len; ++i)
tp->_num[i] = getnum(fd);
if (__COUNT_NUM < header.num_count) {
(void) lseek(
fd, (off_t) (2 * (header.num_count - __COUNT_NUM)),
SEEK_CUR
);
} else {
for (len = header.num_count; len < __COUNT_NUM; ++len)
tp->_num[len] = -1;
}
/* Allocate and fetch strings. */
if ((tp->_str_table = (char *) malloc(header.str_size)) == (char *) 0)
goto error_3;
/* Read in string offset section setting pointers to strings. */
len = min(__COUNT_STR, header.str_count);
for (i = 0; i < len; ++i) {
if ((offset = getnum(fd)) == SHRT_MIN)
goto error_4;
if (offset < 0)
tp->_str[i] = (char *) 0;
else
tp->_str[i] = tp->_str_table + offset;
}
if (__COUNT_STR < header.str_count) {
(void) lseek(
fd, (off_t) (2 * (header.str_count - __COUNT_STR)),
SEEK_CUR
);
} else {
for (; i < __COUNT_STR; ++i)
tp->_str[i] = (char *) 0;
}
if (read(fd, tp->_str_table, header.str_size) != header.str_size)
goto error_4;
(void) close(fd);
return 0;
error_4:
free(tp->_str_table);
error_3:
free(tp->_names);
error_2:
(void) close(fd);
error_1:
return -1;
}
void
use_env(bool bf)
{
#ifdef M_CURSES_TRACE
__m_trace("use_env(%d)", bf);
#endif
use_environment = bf;
__m_return_void("use_env");
}
/*f
* Set up terminal.
*
* Reads in the terminfo database pointed to by $TERMINFO env. var.
* for the given terminal, but does not set up the output virtualization
* structues used by CURSES. If the terminal name pointer is NULL,
* the $TERM env. var. is used for the terminal. All output is to
* the given file descriptor which is initialized for output.
*
* On error, if errret != NULL then setupterm() returns OK
* or ERR and stores a status value in the integer pointed to by
* errret. A status of 1 is normal, 0 means the terminal could
* not be found, and -1 means the terminfo database could not be
* found. If errret == NULL then setupterm() prints an error
* message upon and exit().
*
* On success, cur_term set to a terminfo structure and OK returned.
*/
int
__m_setupterm(termname, ifd, ofd, err_return)
const char *termname;
int ifd, ofd;
int *err_return;
{
int err_code = 1;
TERMINAL *old_term;
char const *err_msg;
/* It is possible to call setupterm() for multiple terminals,
* in which case we have to be able to restore cur_term in
* case of error.
*/
old_term = cur_term;
cur_term = (TERMINAL *) calloc(1, sizeof *cur_term);
if (cur_term == (TERMINAL *) 0) {
err_code = -1;
goto error;
}
if (isatty(cur_term->_ifd = ifd))
cur_term->_flags |= __TERM_ISATTY_IN;
if (isatty(cur_term->_ifd = ofd))
cur_term->_flags |= __TERM_ISATTY_OUT;
(void) def_shell_mode();
(void) def_prog_mode();
#ifdef ONLCR
if ((cur_term->_prog.c_oflag & (OPOST | ONLCR)) == (OPOST | ONLCR))
#else
if (cur_term->_prog.c_oflag & OPOST)
#endif
cur_term->_flags |= __TERM_NL_IS_CRLF;
(void) restartterm(termname, ofd, &err_code);
error:
switch (err_code) {
case -1:
err_msg = e_terminal;
break;
case 0:
err_msg = e_unknown;
break;
case 1:
break;
case 2:
err_msg = e_pathmax;
err_code = -1;
break;
}
if (err_return != (int *) 0) {
#ifdef M_CURSES_TRACE
__m_trace(
"__m_setupterm error code passed back in %p = %d.",
err_return, err_code
);
#endif
*err_return = err_code;
if (err_code == 1) {
err_code = OK;
} else {
err_code = ERR;
free(cur_term);
cur_term = old_term;
}
} else if (err_code != 1) {
#ifdef M_CURSES_TRACE
__m_trace("__m_setupterm() failed with:");
__m_trace(err_msg, termname);
#endif
fprintf(stderr, err_msg, termname);
exit(1);
}
return __m_return_code("__m_setupterm", err_code);
}
int
setupterm(term, out, err)
const char *term;
int out, *err;
{
int code;
#ifdef M_CURSES_TRACE
__m_trace("setupterm(%p, %d, %p)", term, out, err);
#endif
code = __m_setupterm(term, STDIN_FILENO, out, err);
return __m_return_code("setupterm", code);
}
int
del_curterm(tp)
TERMINAL *tp;
{
#ifdef M_CURSES_TRACE
__m_trace("del_curterm(%p)", tp);
#endif
if (tp != (TERMINAL *) 0) {
if (cur_term == tp)
cur_term = (TERMINAL *) 0;
if (tp->_str_table != (char *) 0)
free(tp->_str_table);
if (tp->_names != (char *) 0)
free(tp->_names);
if (tp->_term != (char *) 0)
free(tp->_term);
if (tp->_pair != (short (*)[2]) 0)
free(tp->_pair);
if (tp->_color != (short (*)[3]) 0)
free(tp->_color);
free(tp);
}
return __m_return_code("del_curterm", OK);
}
TERMINAL *
set_curterm(tp)
TERMINAL *tp;
{
TERMINAL *old;
#ifdef M_CURSES_TRACE
__m_trace("set_curterm(%p)", tp);
#endif
old = cur_term;
cur_term = tp;
return __m_return_pointer("set_curterm", old);
}
int
restartterm(tm, fd, err_return)
const char *tm;
int fd, *err_return;
{
size_t len;
int path_max, err_code;
char const *err_msg, *terminfo;
char *old_names, *old_strings, *old_term, *filename;
static char const def_termname[] = M_TERM_NAME;
static char const def_terminfo[] = M_TERMINFO_DIR;
#ifdef M_CURSES_TRACE
__m_trace("restartterm(%s, %d, %p)", tm ? tm : "NULL", fd, err_return);
#endif
err_code = 1;
filename = (char *) 0;
old_term = cur_term->_term;
old_names = cur_term->_names;
old_strings = cur_term->_str_table;
terminfo = __m_getenv("TERMINFO");
if (terminfo == (char *) 0 || terminfo[0] == '\0') {
terminfo = def_terminfo;
} else {
terminfo = (const char *) strdup((char *) terminfo);
if (terminfo == (char *) 0) {
/* Not really true... */
err_msg = e_terminal;
err_code = 2;
goto error;
}
}
if (tm == (char *) 0 && (tm = getenv("TERM")) == (char *) 0)
tm = def_termname;
/* Remember the terminal name being loaded. */
cur_term->_term = m_strdup(tm);
/* Length of path we're going to construct. */
len = strlen(terminfo) + 3 + strlen(tm);
if ((path_max = m_pathmax(terminfo)) == -1 || path_max < len
|| (filename = (char *) malloc(path_max+1)) == (char *) 0) {
err_msg = e_pathmax;
err_code = 2;
goto error;
}
/* Construct terminfo filename. */
(void) sprintf(filename, "%s/%c/%s", terminfo, tolower(tm[0]), tm);
/* Go looking for compiled terminal definition. */
if (__m_read_terminfo(filename, cur_term) < 0) {
/* Length of default terminfo path. */
len = strlen(def_terminfo) + 3 + strlen(tm);
if (path_max < len) {
err_msg = e_pathmax;
err_code = 2;
goto error;
}
(void) sprintf(filename, "%s/%c/%s", def_terminfo, tm[0], tm);
if (__m_read_terminfo(filename, cur_term) < 0) {
err_msg = e_unknown;
err_code = 0;
goto error;
}
}
if (use_environment) {
char *env;
#ifdef TIOCGWINSZ
/*l
* Use ioctl(TIOCGWINSZ) to get row and column values. These
* values may override the default terminfo settings.
*/
{
struct winsize wininfo;
if (ioctl(fd, TIOCGWINSZ, &wininfo) != -1) {
if (0 < wininfo.ws_col)
columns = wininfo.ws_col;
if (0 < wininfo.ws_row)
lines = wininfo.ws_row;
}
}
#endif /* TIOCGWINSZ */
/* Check to see is the user wants a particular size terminal. */
if ((env = __m_getenv("LINES")) != (char *) 0) {
int nlines = strtol(env, (char **) 0, 10);
if (0 < nlines)
lines = nlines;
}
if ((env = __m_getenv("COLUMNS")) != (char *) 0) {
int ncolumns = strtol(env, (char **) 0, 10);
if (0 < ncolumns)
columns = ncolumns;
}
}
if (command_character != (char *) 0 && __m_getenv("CC") != (char *) 0)
do_prototype();
/* If no_color_video is disabled, then assign it a value that
* permits all attributes in combination with colour.
*/
if (no_color_video == -1)
no_color_video = 0;
__m_mvcur_cost();
error:
if (filename != (char *) 0)
free(filename);
if (terminfo != def_terminfo)
free((void *) terminfo);
if (err_return != NULL) {
#ifdef M_CURSES_TRACE
__m_trace(
"restartterm() error code passed back in %p = %d.",
err_return, err_code
);
#endif
*err_return = err_code;
if (err_code == 1) {
err_code = OK;
} else {
err_code = ERR;
cur_term->_term = old_term;
cur_term->_names = old_names;
cur_term->_str_table = old_strings;
}
} else if (err_code != 1) {
#ifdef M_CURSES_TRACE
__m_trace("restartterm() failed with:");
__m_trace(err_msg, tm);
#endif
fprintf(stderr, err_msg, tm);
exit(1);
}
if (err_code == OK) {
if (old_names != (char *) 0)
free(old_names);
if (old_strings != (char *) 0)
free(old_strings);
if (old_term != (char *) 0)
free(old_term);
}
return __m_return_code("restartterm", err_code);
}
/*
* Get the termios setting for the terminal. Check the input
* file descriptor first, else the output file descriptor. If
* both input and output are both terminals, it is assumed that
* they refer to the same terminal.
*/
int
__m_tty_get(tp)
struct termios *tp;
{
if (tcgetattr(cur_term->_ifd, tp) != 0) {
/* Input was not a terminal, possibly redirected.
* Check output instead.
*/
if (tcgetattr(cur_term->_ofd, tp) != 0)
return ERR;
}
return OK;
}
/*
* Restore the termios settings.
*/
int
__m_tty_set(tp)
struct termios *tp;
{
int fd;
if (cur_term->_flags & __TERM_ISATTY_IN)
fd = cur_term->_ifd;
else if (cur_term->_flags & __TERM_ISATTY_OUT)
fd = cur_term->_ofd;
else
return OK;
#ifdef NOT_NOW
return tcsetattr(fd, TCSADRAIN, tp) == 0 ? OK : ERR;
#else
/* VSU testing bug does not read the master side properly so in order
* to drain the buffer. Must use TCSANOW.
*/
return tcsetattr(fd, TCSANOW, tp) == 0 ? OK : ERR;
#endif
}
int
def_shell_mode()
{
#ifdef M_CURSES_TRACE
__m_trace("def_shell_mode(void)");
#endif
return __m_return_code(
"def_shell_mode", __m_tty_get(&cur_term->_shell)
);
}
int
def_prog_mode()
{
#ifdef M_CURSES_TRACE
__m_trace("def_prog_mode(void)");
#endif
return __m_return_code("def_prog_mode", __m_tty_get(&cur_term->_prog));
}
int
reset_shell_mode()
{
#ifdef M_CURSES_TRACE
__m_trace("reset_shell_mode(void)");
#endif
return __m_return_code(
"reset_shell_mode", __m_tty_set(&cur_term->_shell)
);
}
int
reset_prog_mode()
{
#ifdef M_CURSES_TRACE
__m_trace("reset_prog_mode(void)");
#endif
return __m_return_code(
"reset_prog_mode", __m_tty_set(&cur_term->_prog)
);
}