4.4BSD/usr/src/lib/libedit/el.c
/*-
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
#if !defined(lint) && !defined(SCCSID)
static char sccsid[] = "@(#)el.c 8.1 (Berkeley) 6/4/93";
#endif /* not lint && not SCCSID */
/*
* el.c: EditLine interface functions
*/
#include "sys.h"
#include <sys/types.h>
#include <sys/param.h>
#include <string.h>
#include <stdlib.h>
#if __STDC__
# include <stdarg.h>
#else
# include <varargs.h>
#endif
#include "el.h"
/* el_init():
* Initialize editline and set default parameters.
*/
public EditLine *
el_init(prog, fin, fout)
const char *prog;
FILE *fin, *fout;
{
EditLine *el = (EditLine *) el_malloc(sizeof(EditLine));
#ifdef DEBUG
char *tty;
#endif
if (el == NULL)
return NULL;
memset(el, 0, sizeof(EditLine));
el->el_infd = fileno(fin);
el->el_outfile = fout;
el->el_prog = strdup(prog);
#ifdef DEBUG
if ((tty = getenv("DEBUGTTY")) != NULL) {
el->el_errfile = fopen(tty, "w");
if (el->el_errfile == NULL) {
extern errno;
(void) fprintf(stderr, "Cannot open %s (%s).\n",
tty, strerror(errno));
return NULL;
}
}
else
#endif
el->el_errfile = stderr;
/*
* Initialize all the modules. Order is important!!!
*/
(void) term_init(el);
(void) tty_init(el);
(void) key_init(el);
(void) map_init(el);
(void) ch_init(el);
(void) search_init(el);
(void) hist_init(el);
(void) prompt_init(el);
(void) sig_init(el);
el->el_flags = 0;
return el;
} /* end el_init */
/* el_end():
* Clean up.
*/
public void
el_end(el)
EditLine *el;
{
if (el == NULL)
return;
el_reset(el);
term_end(el);
tty_end(el);
key_end(el);
map_end(el);
ch_end(el);
search_end(el);
hist_end(el);
prompt_end(el);
sig_end(el);
el_free((ptr_t) el->el_prog);
el_free((ptr_t) el);
} /* end el_end */
/* el_reset():
* Reset the tty and the parser
*/
public void
el_reset(el)
EditLine *el;
{
tty_cookedmode(el);
ch_reset(el); /* XXX: Do we want that? */
}
/* el_set():
* set the editline parameters
*/
public int
#if __STDC__
el_set(EditLine *el, int op, ...)
#else
el_set(va_alist)
va_dcl
#endif
{
va_list va;
int rv;
#if __STDC__
va_start(va, op);
#else
EditLine *el;
int op;
va_start(va);
el = va_arg(va, EditLine *);
op = va_arg(va, int);
#endif
switch (op) {
case EL_PROMPT:
rv = prompt_set(el, va_arg(va, el_pfunc_t));
break;
case EL_TERMINAL:
rv = term_set(el, va_arg(va, char *));
break;
case EL_EDITOR:
rv = map_set_editor(el, va_arg(va, char *));
break;
case EL_SIGNAL:
if (va_arg(va, int))
el->el_flags |= HANDLE_SIGNALS;
else
el->el_flags &= ~HANDLE_SIGNALS;
rv = 0;
break;
case EL_BIND:
case EL_TELLTC:
case EL_SETTC:
case EL_ECHOTC:
case EL_SETTY:
{
char *argv[20];
int i;
for (i = 1; i < 20; i++)
if ((argv[i] = va_arg(va, char *)) == NULL)
break;
switch (op) {
case EL_BIND:
argv[0] = "bind";
rv = map_bind(el, i, argv);
break;
case EL_TELLTC:
argv[0] = "telltc";
rv = term_telltc(el, i, argv);
break;
case EL_SETTC:
argv[0] = "settc";
rv = term_settc(el, i, argv);
break;
case EL_ECHOTC:
argv[0] = "echotc";
rv = term_echotc(el, i, argv);
break;
case EL_SETTY:
argv[0] = "setty";
rv = tty_stty(el, i, argv);
break;
default:
rv = -1;
abort();
break;
}
}
break;
case EL_ADDFN:
{
char *name = va_arg(va, char *);
char *help = va_arg(va, char *);
el_func_t func = va_arg(va, el_func_t);
rv = map_addfunc(el, name, help, func);
}
break;
case EL_HIST:
{
hist_fun_t func = va_arg(va, hist_fun_t);
ptr_t ptr = va_arg(va, char *);
rv = hist_set(el, func, ptr);
}
break;
default:
rv = -1;
}
va_end(va);
return rv;
} /* end el_set */
/* el_line():
* Return editing info
*/
public const LineInfo *
el_line(el)
EditLine *el;
{
return (const LineInfo *) &el->el_line;
}
static const char elpath[] = "/.editrc";
/* el_source():
* Source a file
*/
public int
el_source(el, fname)
EditLine *el;
const char *fname;
{
FILE *fp;
size_t len;
char *ptr, path[MAXPATHLEN];
if (fname == NULL) {
fname = &elpath[1];
if ((fp = fopen(fname, "r")) == NULL) {
if ((ptr = getenv("HOME")) == NULL)
return -1;
fname = strncpy(path, ptr, MAXPATHLEN);
(void) strncat(path, elpath, MAXPATHLEN);
path[MAXPATHLEN-1] = '\0';
}
}
if ((fp = fopen(fname, "r")) == NULL)
return -1;
while ((ptr = fgetline(fp, &len)) != NULL)
ptr[len - 1] = '\0';
if (parse_line(el, ptr) == -1) {
(void) fclose(fp);
return -1;
}
(void) fclose(fp);
return 0;
}
/* el_resize():
* Called from program when terminal is resized
*/
public void
el_resize(el)
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 (term_get_size(el, &lins, &cols))
term_change_size(el, lins, cols);
(void) sigprocmask(SIG_SETMASK, &oset, NULL);
}