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/*-
* Copyright (c) 1998 Michael Smith <msmith@freebsd.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. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $Id: interp.c,v 1.2 1998/09/01 00:41:24 msmith Exp $
*/
/*
* Simple commandline interpreter, toplevel and misc.
*
* XXX may be obsoleted by BootFORTH
*/
#include <stand.h>
#include <string.h>
#include "bootstrap.h"
#define MAXARGS 20 /* maximum number of arguments allowed */
extern int parse(int *argc, char ***argv, char *str); /* interp_parse.c */
static void prompt(void);
/*
* Perform the command
*/
static int
perform(int argc, char *argv[])
{
int i, result;
struct bootblk_command **cmdp;
bootblk_cmd_t *cmd;
if (argc < 1)
return(CMD_OK);
/* set return defaults; a successful command will override these */
command_errmsg = command_errbuf;
strcpy(command_errbuf, "no error message");
cmd = NULL;
result = CMD_ERROR;
cmdp = (struct bootblk_command **)Xcommand_set.ls_items;
for (i = 0; i < Xcommand_set.ls_length; i++) {
if ((cmdp[i]->c_name != NULL) && !strcmp(argv[0], cmdp[i]->c_name))
cmd = cmdp[i]->c_fn;
}
if (cmd != NULL) {
result = (cmd)(argc, argv);
} else {
command_errmsg = "unknown command";
}
return(result);
}
/*
* Interactive mode
*/
void
interact(void)
{
char input[256]; /* big enough? */
int argc;
char **argv;
/*
* Read our default configuration
*/
source("/boot/boot.conf");
printf("\n");
/*
* Before interacting, we might want to autoboot
*/
if (getenv("no_autoboot") == NULL)
autoboot(10, NULL); /* try to boot automatically */
/*
* Not autobooting, go manual
*/
printf("\nType '?' for a list of commands, 'help' for more detailed help.\n");
setenv("prompt", "${currdev}>", 1);
for (;;) {
input[0] = '\0';
prompt();
ngets(input, sizeof(input));
if (!parse(&argc, &argv, input)) {
if (perform(argc, argv))
printf("%s: %s\n", argv[0], command_errmsg);
free(argv);
} else {
printf("parse error\n");
}
}
}
/*
* Read command from a file
*/
COMMAND_SET(source, "source", "read commands from a file", command_source);
static int
command_source(int argc, char *argv[])
{
int i;
for (i = 1; i < argc; i++)
source(argv[i]);
return(CMD_OK);
}
void
source(char *filename)
{
char input[256]; /* big enough? */
int argc;
char **argv, *cp;
int fd;
if (((fd = open(filename, O_RDONLY)) == -1)) {
printf("can't open '%s': %s\n", filename, strerror(errno));
} else {
while (fgetstr(input, sizeof(input), fd) > 0) {
/* Discard comments */
if (input[0] == '#')
continue;
cp = input;
/* Echo? */
if (input[0] == '@') {
cp++;
} else {
prompt();
printf("%s\n", input);
}
if (!parse(&argc, &argv, cp)) {
if ((argc > 0) &&
(perform(argc, argv) != 0))
printf("%s: %s\n", argv[0], command_errmsg);
free(argv);
}
}
close(fd);
}
}
/*
* Emit the current prompt; use the same syntax as the parser
* for embedding environment variables.
*/
static void
prompt(void)
{
char *p, *cp, *ev;
if ((cp = getenv("prompt")) == NULL)
cp = ">";
p = strdup(cp);
while (*p != 0) {
if ((*p == '$') && (*(p+1) == '{')) {
for (cp = p + 2; (*cp != 0) && (*cp != '}'); cp++)
;
*cp = 0;
ev = getenv(p + 2);
if (ev != NULL)
printf(ev);
p = cp + 1;
continue;
}
putchar(*p++);
}
putchar(' ');
}
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