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/* $OpenBSD: clit.c,v 1.5 2003/10/31 08:47:31 otto Exp $ */
/*
* Copyright (c) 2002 Artur Grabowski <art@openbsd.org>
* All rights reserved.
*
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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 <stdlib.h>
#include <stdio.h>
#include <histedit.h>
#include <err.h>
#include <string.h>
#include "clit.h"
extern char *__progname;
char *prompt_add;
static char *
prompt(EditLine *el)
{
static char p[64];
snprintf(p, sizeof(p), "%s%s> ", __progname,
prompt_add ? prompt_add : "");
return p;
}
/*
* Returns number of commands that (at least partially) match "name".
*/
static int
name_to_cmd(const char *name, struct clit *cmds, int ncmds, struct clit **res)
{
int i, len, ret;
len = strlen(name);
ret = 0;
for (i = 0; i < ncmds; i++) {
if (strncmp(cmds[i].cmd, name, len) == 0) {
*res = &cmds[i];
ret++;
}
}
return ret;
}
struct clitenv {
struct clit *cmds;
int ncmds;
EditLine *el;
History *hist;
};
int
cmd_help(int argc, char **argv, void *arg)
{
struct clitenv *env = arg;
struct clit *cmds = env->cmds, *cmdp;
int ncmds = env->ncmds;
int i, res;
if (argc > 1) {
res = name_to_cmd(argv[1], cmds, ncmds, &cmdp);
if (res == 1) {
printf("%s\t%s\n", cmdp->cmd, cmdp->help);
} else {
fprintf(stderr, "%s command: %s\n",
res == 0 ? "unknown" : "ambiguous", argv[1]);
}
return 0;
}
for (i = 0; i < ncmds; i++) {
cmdp = &cmds[i];
printf("%s\t%s\n", cmdp->cmd, cmdp->help);
}
return 0;
}
/*
* XXX - there is no way to push external args into this function.
*/
unsigned char
complt(EditLine *el, int ch)
{
const LineInfo *line;
char str[1024];
int len, ret;
line = el_line(el);
if (line->cursor != line->lastchar)
return CC_ERROR;
len = line->lastchar - line->buffer;
if (len >= 1023)
return CC_ERROR;
memcpy(str, line->buffer, len);
str[len] = '\0';
ret = cmd_complt(str, sizeof(str));
el_push(el, &str[len]);
return ret ? CC_ERROR : CC_REDISPLAY;
}
void *
cmdinit(struct clit *cmds, int ncmds)
{
struct clitenv *env;
HistEvent ev;
if ((env = malloc(sizeof(*env))) == NULL)
err(1, "Can't init cmd interpreter.");
env->cmds = cmds;
env->ncmds = ncmds;
env->hist = history_init();
history(env->hist, &ev, H_SETSIZE, 100);
env->el = el_init(__progname, stdin, stdout, stderr);
el_set(env->el, EL_EDITOR, "emacs");
el_set(env->el, EL_PROMPT, prompt);
el_set(env->el, EL_HIST, history, env->hist);
el_set(env->el, EL_ADDFN, "complt", "complete", complt);
el_set(env->el, EL_BIND, "\t", "complt");
el_source(env->el, NULL);
/* XXX - EL_SIGNAL ? */
return env;
}
void
cmdend(void *arg)
{
struct clitenv *env = arg;
el_end(env->el);
history_end(env->hist);
free(env);
}
int
cmdloop(void *arg)
{
struct clitenv *env = arg;
EditLine *el = env->el;
History *hist = env->hist;
const char *elline;
int cnt;
char **argv;
int maxargs = 16; /* XXX */
int stop;
stop = 0;
if ((argv = malloc(sizeof(char *) * maxargs)) == NULL)
err(1, "malloc");
while (!stop && (elline = el_gets(el, &cnt)) != NULL) {
char *line, *orgline;
struct clit *cmdp;
char **ap;
int argc, res;
HistEvent ev;
memset(argv, 0, sizeof(char *) * maxargs);
history(hist, &ev, H_ENTER, elline);
orgline = line = strdup(elline);
if (line == NULL)
err(1, "strdup");
argc = 0;
for (ap = argv; (*ap = strsep(&line, " \t\n")) != NULL;) {
if (**ap != '\0') {
++ap;
if (++argc == maxargs)
break;
}
}
if (argc == maxargs) {
fprintf(stderr, "Too many arguments\n");
goto cmdout;
}
if (!argc)
goto cmdout;
/*
* Editline commands.
*/
if (el_parse(el, argc, (const char **)argv) != -1)
goto cmdout;
if ((res = name_to_cmd(argv[0], env->cmds, env->ncmds,
&cmdp)) == 1) {
if (argc - 1 > cmdp->maxargc)
fprintf(stderr, "Too many arguments\n");
else if (argc - 1 < cmdp->minargc)
fprintf(stderr, "Too few arguments\n");
else
stop = (*cmdp->handler)(argc, argv,
cmdp->arg ? cmdp->arg : env);
} else {
fprintf(stderr, "%s command: %s\n",
res == 0 ? "unknown" : "ambiguous", argv[0]);
}
cmdout:
free(orgline);
}
free(argv);
return stop;
}
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