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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.
*/
/*
* Simple commandline interpreter, toplevel and misc.
*/
#include <stand.h>
#include <string.h>
#include "bootstrap.h"
INTERP_DEFINE("simp");
void
interp_preinit(void)
{
}
void
interp_init(void)
{
setenv("script.lang", "simple", 1);
/* Read our default configuration. */
interp_include("/boot/loader.rc");
}
int
interp_run(const char *input)
{
int argc;
char **argv;
if (parse(&argc, &argv, input)) {
printf("parse error\n");
return CMD_ERROR;
}
if (interp_builtin_cmd(argc, argv)) {
printf("%s: %s\n", argv[0], command_errmsg);
free(argv);
return CMD_ERROR;
}
free(argv);
return CMD_OK;
}
/*
* Header prepended to each line. The text immediately follows the header.
* We try to make this short in order to save memory -- the loader has
* limited memory available, and some of the forth files are very long.
*/
struct includeline
{
struct includeline *next;
int flags;
int line;
#define SL_QUIET (1<<0)
#define SL_IGNOREERR (1<<1)
char text[0];
};
int
interp_include(const char *filename)
{
struct includeline *script, *se, *sp;
char input[256]; /* big enough? */
int argc,res;
char **argv, *cp;
int fd, flags, line;
if (((fd = open(filename, O_RDONLY)) == -1)) {
snprintf(command_errbuf, sizeof(command_errbuf),
"can't open '%s': %s", filename, strerror(errno));
return(CMD_ERROR);
}
#ifdef LOADER_VERIEXEC
if (verify_file(fd, filename, 0, VE_GUESS, __func__) < 0) {
close(fd);
sprintf(command_errbuf,"can't verify '%s'", filename);
return(CMD_ERROR);
}
#endif
/*
* Read the script into memory.
*/
script = se = NULL;
line = 0;
while (fgetstr(input, sizeof(input), fd) >= 0) {
line++;
flags = 0;
/* Discard comments */
if (strncmp(input+strspn(input, " "), "\\", 1) == 0)
continue;
cp = input;
/* Echo? */
if (input[0] == '@') {
cp++;
flags |= SL_QUIET;
}
/* Error OK? */
if (input[0] == '-') {
cp++;
flags |= SL_IGNOREERR;
}
/* Allocate script line structure and copy line, flags */
if (*cp == '\0')
continue; /* ignore empty line, save memory */
sp = malloc(sizeof(struct includeline) + strlen(cp) + 1);
/* On malloc failure (it happens!), free as much as possible and exit */
if (sp == NULL) {
while (script != NULL) {
se = script;
script = script->next;
free(se);
}
snprintf(command_errbuf, sizeof(command_errbuf),
"file '%s' line %d: memory allocation failure - aborting",
filename, line);
close(fd);
return (CMD_ERROR);
}
strcpy(sp->text, cp);
sp->flags = flags;
sp->line = line;
sp->next = NULL;
if (script == NULL) {
script = sp;
} else {
se->next = sp;
}
se = sp;
}
close(fd);
/*
* Execute the script
*/
argv = NULL;
res = CMD_OK;
for (sp = script; sp != NULL; sp = sp->next) {
/* print if not being quiet */
if (!(sp->flags & SL_QUIET)) {
interp_emit_prompt();
printf("%s\n", sp->text);
}
/* Parse the command */
if (!parse(&argc, &argv, sp->text)) {
if ((argc > 0) && (interp_builtin_cmd(argc, argv) != 0)) {
/* normal command */
printf("%s: %s\n", argv[0], command_errmsg);
if (!(sp->flags & SL_IGNOREERR)) {
res=CMD_ERROR;
break;
}
}
free(argv);
argv = NULL;
} else {
printf("%s line %d: parse error\n", filename, sp->line);
res=CMD_ERROR;
break;
}
}
if (argv != NULL)
free(argv);
while (script != NULL) {
se = script;
script = script->next;
free(se);
}
return(res);
}
/*
* There's no graphics commands for the simple interpreter.
*/
void
gfx_interp_ref(void)
{
}
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