Import /usr/src/lib/libedit from NetBSD 8.0

1 files changed, 649 insertions, 0 deletions

diff --git a/bin/cash/libedit/el.c b/bin/cash/libedit/el.c
new file mode 100644
index 00000000..c30f50ca
--- /dev/null
+++ b/bin/cash/libedit/el.c
@@ -0,0 +1,649 @@
+/*	$NetBSD: el.c,v 1.92.8.1 2017/07/23 14:41:26 snj 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 1.92.8.1 2017/07/23 14:41:26 snj Exp $");
+#endif
+#endif /* not lint && not SCCSID */
+
+/*
+ * el.c: EditLine interface functions
+ */
+#include <sys/types.h>
+#include <sys/param.h>
+#include <ctype.h>
+#include <langinfo.h>
+#include <locale.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "el.h"
+#include "parse.h"
+#include "read.h"
+
+/* el_init():
+ *	Initialize editline and set default parameters.
+ */
+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));
+}
+
+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 = wcsdup(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;
+	if (setlocale(LC_CTYPE, NULL) != NULL){
+		if (strcmp(nl_langinfo(CODESET), "UTF-8") == 0)
+			el->el_flags |= CHARSET_IS_UTF8;
+	}
+
+	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) literal_init(el);
+	if (read_init(el) == -1) {
+		el_end(el);
+		return NULL;
+	}
+	return el;
+}
+
+
+/* el_end():
+ *	Clean up.
+ */
+void
+el_end(EditLine *el)
+{
+
+	if (el == NULL)
+		return;
+
+	el_reset(el);
+
+	terminal_end(el);
+	keymacro_end(el);
+	map_end(el);
+	if (!(el->el_flags & NO_TTY))
+		tty_end(el);
+	ch_end(el);
+	read_end(el->el_read);
+	search_end(el);
+	hist_end(el);
+	prompt_end(el);
+	sig_end(el);
+	literal_end(el);
+
+	el_free(el->el_prog);
+	el_free(el->el_visual.cbuff);
+	el_free(el->el_visual.wbuff);
+	el_free(el->el_scratch.cbuff);
+	el_free(el->el_scratch.wbuff);
+	el_free(el->el_lgcyconv.cbuff);
+	el_free(el->el_lgcyconv.wbuff);
+	el_free(el);
+}
+
+
+/* el_reset():
+ *	Reset the tty and the parser
+ */
+void
+el_reset(EditLine *el)
+{
+
+	tty_cookedmode(el);
+	ch_reset(el);		/* XXX: Do we want that? */
+}
+
+
+/* el_set():
+ *	set the editline parameters
+ */
+int
+el_wset(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_ALIAS_TEXT: {
+		el_afunc_t p = va_arg(ap, el_afunc_t);
+		void *arg = va_arg(ap, void *);
+		rv = ch_aliasfun(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, (wchar_t)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, wchar_t *));
+		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 wchar_t *argv[20];
+		int i;
+
+		for (i = 1; i < (int)__arraycount(argv); i++)
+			if ((argv[i] = va_arg(ap, wchar_t *)) == NULL)
+				break;
+
+		switch (op) {
+		case EL_BIND:
+			argv[0] = L"bind";
+			rv = map_bind(el, i, argv);
+			break;
+
+		case EL_TELLTC:
+			argv[0] = L"telltc";
+			rv = terminal_telltc(el, i, argv);
+			break;
+
+		case EL_SETTC:
+			argv[0] = L"settc";
+			rv = terminal_settc(el, i, argv);
+			break;
+
+		case EL_ECHOTC:
+			argv[0] = L"echotc";
+			rv = terminal_echotc(el, i, argv);
+			break;
+
+		case EL_SETTY:
+			argv[0] = L"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:
+	{
+		wchar_t *name = va_arg(ap, wchar_t *);
+		wchar_t *help = va_arg(ap, wchar_t *);
+		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->el_read, rc);
+		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
+ */
+int
+el_wget(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 *);
+		wchar_t *c = va_arg(ap, wchar_t *);
+
+		rv = prompt_get(el, p, c, op);
+		break;
+	}
+
+	case EL_EDITOR:
+		rv = map_get_editor(el, va_arg(ap, const wchar_t **));
+		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->el_read);
+		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
+ */
+const LineInfoW *
+el_wline(EditLine *el)
+{
+
+	return (const LineInfoW *)(void *)&el->el_line;
+}
+
+
+/* el_source():
+ *	Source a file
+ */
+int
+el_source(EditLine *el, const char *fname)
+{
+	FILE *fp;
+	size_t len;
+	ssize_t slen;
+	char *ptr;
+	char *path = NULL;
+	const wchar_t *dptr;
+	int error = 0;
+
+	fp = NULL;
+	if (fname == NULL) {
+#ifdef HAVE_ISSETUGID
+		if (issetugid())
+			return -1;
+
+		if ((fname = getenv("EDITRC")) == NULL) {
+			static const char elpath[] = "/.editrc";
+			size_t plen = sizeof(elpath);
+
+			if ((ptr = 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 + (*ptr == '\0'));
+			fname = path;
+		}
+#else
+		/*
+		 * If issetugid() is missing, always return an error, in order
+		 * to keep from inadvertently opening up the user to a security
+		 * hole.
+		 */
+		return -1;
+#endif
+	}
+	if (fname[0] == '\0')
+		return -1;
+
+	if (fp == NULL)
+		fp = fopen(fname, "r");
+	if (fp == NULL) {
+		el_free(path);
+		return -1;
+	}
+
+	ptr = NULL;
+	len = 0;
+	while ((slen = getline(&ptr, &len, fp)) != -1) {
+		if (*ptr == '\n')
+			continue;	/* Empty line. */
+		if (slen > 0 && ptr[--slen] == '\n')
+			ptr[slen] = '\0';
+
+		dptr = ct_decode_string(ptr, &el->el_scratch);
+		if (!dptr)
+			continue;
+		/* loop until first non-space char or EOL */
+		while (*dptr != '\0' && iswspace(*dptr))
+			dptr++;
+		if (*dptr == '#')
+			continue;   /* ignore, this is a comment line */
+		if ((error = parse_line(el, dptr)) == -1)
+			break;
+	}
+	free(ptr);
+
+	el_free(path);
+	(void) fclose(fp);
+	return error;
+}
+
+
+/* el_resize():
+ *	Called from program when terminal is resized
+ */
+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
+ */
+void
+el_beep(EditLine *el)
+{
+
+	terminal_beep(el);
+}
+
+
+/* el_editmode()
+ *	Set the state of EDIT_DISABLED from the `edit' command.
+ */
+libedit_private int
+/*ARGSUSED*/
+el_editmode(EditLine *el, int argc, const wchar_t **argv)
+{
+	const wchar_t *how;
+
+	if (argv == NULL || argc != 2 || argv[1] == NULL)
+		return -1;
+
+	how = argv[1];
+	if (wcscmp(how, L"on") == 0) {
+		el->el_flags &= ~EDIT_DISABLED;
+		tty_rawmode(el);
+	} else if (wcscmp(how, L"off") == 0) {
+		tty_cookedmode(el);
+		el->el_flags |= EDIT_DISABLED;
+	}
+	else {
+		(void) fprintf(el->el_errfile, "edit: Bad value `%ls'.\n",
+		    how);
+		return -1;
+	}
+	return 0;
+}