/* $NetBSD: el.c,v 1.72 2013/01/22 20:23:21 christos Exp $ */
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Christos Zoulas of Cornell University.
*
* 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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.
*/
#include "config.h"
#if !defined(lint) && !defined(SCCSID)
#if 0
static char sccsid[] = "@(#)el.c 8.2 (Berkeley) 1/3/94";
#else
__RCSID("$NetBSD: el.c,v 1.72 2013/01/22 20:23:21 christos Exp $");
#endif
#endif /* not lint && not SCCSID */
#ifndef MAXPATHLEN
#define MAXPATHLEN 4096
#endif
/*
* el.c: EditLine interface functions
*/
#include <sys/types.h>
#include <sys/param.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <ctype.h>
#include <locale.h>
#include <langinfo.h>
#include "el.h"
#ifndef HAVE_SECURE_GETENV
# ifdef HAVE___SECURE_GETENV
# define secure_getenv __secure_getenv
# define HAVE_SECURE_GETENV 1
# else
# ifdef HAVE_ISSETUGID
# include <unistd.h>
# else
# undef issetugid
# define issetugid() 1
# endif
# endif
#endif
#ifndef HAVE_SECURE_GETENV
char *secure_getenv(char const *name)
{
if (issetugid())
return 0;
return getenv(name);
}
#endif
/* el_init():
* Initialize editline and set default parameters.
*/
public EditLine *
el_init(const char *prog, FILE *fin, FILE *fout, FILE *ferr)
{
return el_init_fd(prog, fin, fout, ferr, fileno(fin), fileno(fout),
fileno(ferr));
}
public EditLine *
el_init_fd(const char *prog, FILE *fin, FILE *fout, FILE *ferr,
int fdin, int fdout, int fderr)
{
EditLine *el = el_malloc(sizeof(*el));
if (el == NULL)
return NULL;
memset(el, 0, sizeof(EditLine));
el->el_infile = fin;
el->el_outfile = fout;
el->el_errfile = ferr;
el->el_infd = fdin;
el->el_outfd = fdout;
el->el_errfd = fderr;
el->el_prog = Strdup(ct_decode_string(prog, &el->el_scratch));
if (el->el_prog == NULL) {
el_free(el);
return NULL;
}
/*
* Initialize all the modules. Order is important!!!
*/
el->el_flags = 0;
#ifdef WIDECHAR
if (setlocale(LC_CTYPE, NULL) != NULL){
if (strcmp(nl_langinfo(CODESET), "UTF-8") == 0)
el->el_flags |= CHARSET_IS_UTF8;
}
#endif
if (terminal_init(el) == -1) {
el_free(el->el_prog);
el_free(el);
return NULL;
}
(void) keymacro_init(el);
(void) map_init(el);
if (tty_init(el) == -1)
el->el_flags |= NO_TTY;
(void) ch_init(el);
(void) search_init(el);
(void) hist_init(el);
(void) prompt_init(el);
(void) sig_init(el);
(void) read_init(el);
return el;
}
/* el_end():
* Clean up.
*/
public void
el_end(EditLine *el)
{
if (el == NULL)
return;
el_reset(el);
terminal_end(el);
keymacro_end(el);
map_end(el);
tty_end(el);
ch_end(el);
search_end(el);
hist_end(el);
prompt_end(el);
sig_end(el);
el_free(el->el_prog);
#ifdef WIDECHAR
el_free(el->el_scratch.cbuff);
el_free(el->el_scratch.wbuff);
el_free(el->el_lgcyconv.cbuff);
el_free(el->el_lgcyconv.wbuff);
#endif
el_free(el);
}
/* el_reset():
* Reset the tty and the parser
*/
public void
el_reset(EditLine *el)
{
tty_cookedmode(el);
ch_reset(el, 0); /* XXX: Do we want that? */
}
/* el_set():
* set the editline parameters
*/
public int
FUN(el,set)(EditLine *el, int op, ...)
{
va_list ap;
int rv = 0;
if (el == NULL)
return -1;
va_start(ap, op);
switch (op) {
case EL_PROMPT:
case EL_RPROMPT: {
el_pfunc_t p = va_arg(ap, el_pfunc_t);
rv = prompt_set(el, p, 0, op, 1);
break;
}
case EL_RESIZE: {
el_zfunc_t p = va_arg(ap, el_zfunc_t);
void *arg = va_arg(ap, void *);
rv = ch_resizefun(el, p, arg);
break;
}
case EL_PROMPT_ESC:
case EL_RPROMPT_ESC: {
el_pfunc_t p = va_arg(ap, el_pfunc_t);
int c = va_arg(ap, int);
rv = prompt_set(el, p, c, op, 1);
break;
}
case EL_TERMINAL:
rv = terminal_set(el, va_arg(ap, char *));
break;
case EL_EDITOR:
rv = map_set_editor(el, va_arg(ap, Char *));
break;
case EL_SIGNAL:
if (va_arg(ap, int))
el->el_flags |= HANDLE_SIGNALS;
else
el->el_flags &= ~HANDLE_SIGNALS;
break;
case EL_BIND:
case EL_TELLTC:
case EL_SETTC:
case EL_ECHOTC:
case EL_SETTY:
{
const Char *argv[20];
int i;
for (i = 1; i < (int)__arraycount(argv); i++)
if ((argv[i] = va_arg(ap, Char *)) == NULL)
break;
switch (op) {
case EL_BIND:
argv[0] = STR("bind");
rv = map_bind(el, i, argv);
break;
case EL_TELLTC:
argv[0] = STR("telltc");
rv = terminal_telltc(el, i, argv);
break;
case EL_SETTC:
argv[0] = STR("settc");
rv = terminal_settc(el, i, argv);
break;
case EL_ECHOTC:
argv[0] = STR("echotc");
rv = terminal_echotc(el, i, argv);
break;
case EL_SETTY:
argv[0] = STR("setty");
rv = tty_stty(el, i, argv);
break;
default:
rv = -1;
EL_ABORT((el->el_errfile, "Bad op %d\n", op));
break;
}
break;
}
case EL_ADDFN:
{
Char *name = va_arg(ap, Char *);
Char *help = va_arg(ap, Char *);
el_func_t func = va_arg(ap, el_func_t);
rv = map_addfunc(el, name, help, func);
break;
}
case EL_HIST:
{
hist_fun_t func = va_arg(ap, hist_fun_t);
void *ptr = va_arg(ap, void *);
rv = hist_set(el, func, ptr);
if (!(el->el_flags & CHARSET_IS_UTF8))
el->el_flags &= ~NARROW_HISTORY;
break;
}
case EL_EDITMODE:
if (va_arg(ap, int))
el->el_flags &= ~EDIT_DISABLED;
else
el->el_flags |= EDIT_DISABLED;
rv = 0;
break;
case EL_GETCFN:
{
el_rfunc_t rc = va_arg(ap, el_rfunc_t);
rv = el_read_setfn(el, rc);
el->el_flags &= ~NARROW_READ;
break;
}
case EL_CLIENTDATA:
el->el_data = va_arg(ap, void *);
break;
case EL_UNBUFFERED:
rv = va_arg(ap, int);
if (rv && !(el->el_flags & UNBUFFERED)) {
el->el_flags |= UNBUFFERED;
read_prepare(el);
} else if (!rv && (el->el_flags & UNBUFFERED)) {
el->el_flags &= ~UNBUFFERED;
read_finish(el);
}
rv = 0;
break;
case EL_PREP_TERM:
rv = va_arg(ap, int);
if (rv)
(void) tty_rawmode(el);
else
(void) tty_cookedmode(el);
rv = 0;
break;
case EL_SETFP:
{
FILE *fp;
int what;
what = va_arg(ap, int);
fp = va_arg(ap, FILE *);
rv = 0;
switch (what) {
case 0:
el->el_infile = fp;
el->el_infd = fileno(fp);
break;
case 1:
el->el_outfile = fp;
el->el_outfd = fileno(fp);
break;
case 2:
el->el_errfile = fp;
el->el_errfd = fileno(fp);
break;
default:
rv = -1;
break;
}
break;
}
case EL_REFRESH:
re_clear_display(el);
re_refresh(el);
terminal__flush(el);
break;
default:
rv = -1;
break;
}
va_end(ap);
return rv;
}
/* el_get():
* retrieve the editline parameters
*/
public int
FUN(el,get)(EditLine *el, int op, ...)
{
va_list ap;
int rv;
if (el == NULL)
return -1;
va_start(ap, op);
switch (op) {
case EL_PROMPT:
case EL_RPROMPT: {
el_pfunc_t *p = va_arg(ap, el_pfunc_t *);
rv = prompt_get(el, p, 0, op);
break;
}
case EL_PROMPT_ESC:
case EL_RPROMPT_ESC: {
el_pfunc_t *p = va_arg(ap, el_pfunc_t *);
Char *c = va_arg(ap, Char *);
rv = prompt_get(el, p, c, op);
break;
}
case EL_EDITOR:
rv = map_get_editor(el, va_arg(ap, const Char **));
break;
case EL_SIGNAL:
*va_arg(ap, int *) = (el->el_flags & HANDLE_SIGNALS);
rv = 0;
break;
case EL_EDITMODE:
*va_arg(ap, int *) = !(el->el_flags & EDIT_DISABLED);
rv = 0;
break;
case EL_TERMINAL:
terminal_get(el, va_arg(ap, const char **));
rv = 0;
break;
case EL_GETTC:
{
static char name[] = "gettc";
char *argv[20];
int i;
for (i = 1; i < (int)__arraycount(argv); i++)
if ((argv[i] = va_arg(ap, char *)) == NULL)
break;
argv[0] = name;
rv = terminal_gettc(el, i, argv);
break;
}
case EL_GETCFN:
*va_arg(ap, el_rfunc_t *) = el_read_getfn(el);
rv = 0;
break;
case EL_CLIENTDATA:
*va_arg(ap, void **) = el->el_data;
rv = 0;
break;
case EL_UNBUFFERED:
*va_arg(ap, int *) = (el->el_flags & UNBUFFERED) != 0;
rv = 0;
break;
case EL_GETFP:
{
int what;
FILE **fpp;
what = va_arg(ap, int);
fpp = va_arg(ap, FILE **);
rv = 0;
switch (what) {
case 0:
*fpp = el->el_infile;
break;
case 1:
*fpp = el->el_outfile;
break;
case 2:
*fpp = el->el_errfile;
break;
default:
rv = -1;
break;
}
break;
}
default:
rv = -1;
break;
}
va_end(ap);
return rv;
}
/* el_line():
* Return editing info
*/
public const TYPE(LineInfo) *
FUN(el,line)(EditLine *el)
{
return (const TYPE(LineInfo) *)(void *)&el->el_line;
}
/* el_source():
* Source a file
*/
public int
el_source(EditLine *el, const char *fname)
{
FILE *fp;
size_t len;
char *ptr;
char *path = NULL;
const Char *dptr;
int error = 0;
fp = NULL;
if (fname == NULL) {
static const char elpath[] = "/.editrc";
size_t plen = sizeof(elpath);
if ((ptr = secure_getenv("HOME")) == NULL)
return -1;
plen += strlen(ptr);
if ((path = el_malloc(plen * sizeof(*path))) == NULL)
return -1;
(void)snprintf(path, plen, "%s%s", ptr, elpath);
fname = path;
}
if (fp == NULL)
fp = fopen(fname, "r");
if (fp == NULL) {
el_free(path);
return -1;
}
while ((ptr = fgetln(fp, &len)) != NULL) {
if (*ptr == '\n')
continue; /* Empty line. */
dptr = ct_decode_string(ptr, &el->el_scratch);
if (!dptr)
continue;
if (len > 0 && dptr[len - 1] == '\n')
--len;
/* loop until first non-space char or EOL */
while (*dptr != '\0' && Isspace(*dptr))
dptr++;
if (*dptr == '#')
continue; /* ignore, this is a comment line */
if ((error = parse_line(el, dptr)) == -1)
break;
}
el_free(path);
(void) fclose(fp);
return error;
}
/* el_resize():
* Called from program when terminal is resized
*/
public void
el_resize(EditLine *el)
{
int lins, cols;
sigset_t oset, nset;
(void) sigemptyset(&nset);
(void) sigaddset(&nset, SIGWINCH);
(void) sigprocmask(SIG_BLOCK, &nset, &oset);
/* get the correct window size */
if (terminal_get_size(el, &lins, &cols))
terminal_change_size(el, lins, cols);
(void) sigprocmask(SIG_SETMASK, &oset, NULL);
}
/* el_beep():
* Called from the program to beep
*/
public void
el_beep(EditLine *el)
{
terminal_beep(el);
}
/* el_editmode()
* Set the state of EDIT_DISABLED from the `edit' command.
*/
protected int
/*ARGSUSED*/
el_editmode(EditLine *el, int argc, const Char **argv)
{
const Char *how;
if (argv == NULL || argc != 2 || argv[1] == NULL)
return -1;
how = argv[1];
if (Strcmp(how, STR("on")) == 0) {
el->el_flags &= ~EDIT_DISABLED;
tty_rawmode(el);
} else if (Strcmp(how, STR("off")) == 0) {
tty_cookedmode(el);
el->el_flags |= EDIT_DISABLED;
}
else {
(void) fprintf(el->el_errfile, "edit: Bad value `" FSTR "'.\n",
how);
return -1;
}
return 0;
}