2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
31 * Simple commandline interpreter, toplevel and misc.
33 * XXX may be obsoleted by BootFORTH or some other, better, interpreter.
38 #include "bootstrap.h"
42 extern FICL_VM *bf_vm;
45 #define MAXARGS 20 /* maximum number of arguments allowed */
47 static void prompt(void);
54 perform(int argc, char *argv[])
57 struct bootblk_command **cmdp;
63 /* set return defaults; a successful command will override these */
64 command_errmsg = command_errbuf;
65 strcpy(command_errbuf, "no error message");
69 /* search the command set for the command */
70 SET_FOREACH(cmdp, Xcommand_set) {
71 if (((*cmdp)->c_name != NULL) && !strcmp(argv[0], (*cmdp)->c_name))
75 result = (cmd)(argc, argv);
77 command_errmsg = "unknown command";
81 #endif /* ! BOOT_FORTH */
89 static char input[256]; /* big enough? */
99 /* Read our default configuration. */
100 include("/boot/loader.rc");
105 * Before interacting, we might want to autoboot.
110 * Not autobooting, go manual
112 printf("\nType '?' for a list of commands, 'help' for more detailed help.\n");
113 if (getenv("prompt") == NULL)
114 setenv("prompt", "${interpret}", 1);
115 if (getenv("interpret") == NULL)
116 setenv("interpret", "OK", 1);
122 ngets(input, sizeof(input));
124 bf_vm->sourceID.i = 0;
127 if (!parse(&argc, &argv, input)) {
128 if (perform(argc, argv))
129 printf("%s: %s\n", argv[0], command_errmsg);
132 printf("parse error\n");
139 * Read commands from a file, then execute them.
141 * We store the commands in memory and close the source file so that the media
142 * holding it can safely go away while we are executing.
144 * Commands may be prefixed with '@' (so they aren't displayed) or '-' (so
145 * that the script won't stop if they fail).
147 COMMAND_SET(include, "include", "read commands from a file", command_include);
150 command_include(int argc, char *argv[])
157 * Since argv is static, we need to save it here.
159 argvbuf = (char**) calloc((u_int)argc, sizeof(char*));
160 for (i = 0; i < argc; i++)
161 argvbuf[i] = strdup(argv[i]);
164 for (i = 1; (i < argc) && (res == CMD_OK); i++)
165 res = include(argvbuf[i]);
167 for (i = 0; i < argc; i++)
175 * Header prepended to each line. The text immediately follows the header.
176 * We try to make this short in order to save memory -- the loader has
177 * limited memory available, and some of the forth files are very long.
181 struct includeline *next;
185 #define SL_QUIET (1<<0)
186 #define SL_IGNOREERR (1<<1)
192 include(const char *filename)
194 struct includeline *script, *se, *sp;
195 char input[256]; /* big enough? */
199 int prevsrcid, fd, line;
206 if (((fd = open(filename, O_RDONLY)) == -1)) {
207 snprintf(command_errbuf, sizeof(command_errbuf),
208 "can't open '%s': %s", filename, strerror(errno));
213 * Read the script into memory.
218 while (fgetstr(input, sizeof(input), fd) >= 0) {
224 /* Discard comments */
225 if (strncmp(input+strspn(input, " "), "\\ ", 2) == 0)
229 if (input[0] == '@') {
234 if (input[0] == '-') {
236 flags |= SL_IGNOREERR;
239 /* Allocate script line structure and copy line, flags */
241 continue; /* ignore empty line, save memory */
242 sp = malloc(sizeof(struct includeline) + strlen(cp) + 1);
243 /* On malloc failure (it happens!), free as much as possible and exit */
245 while (script != NULL) {
247 script = script->next;
250 snprintf(command_errbuf, sizeof(command_errbuf),
251 "file '%s' line %d: memory allocation failure - aborting",
255 strcpy(sp->text, cp);
262 if (script == NULL) {
277 prevsrcid = bf_vm->sourceID.i;
278 bf_vm->sourceID.i = fd;
281 for (sp = script; sp != NULL; sp = sp->next) {
284 res = bf_run(sp->text);
285 if (res != VM_OUTOFTEXT) {
286 snprintf(command_errbuf, sizeof(command_errbuf),
287 "Error while including %s, in the line:\n%s",
294 /* print if not being quiet */
295 if (!(sp->flags & SL_QUIET)) {
297 printf("%s\n", sp->text);
300 /* Parse the command */
301 if (!parse(&argc, &argv, sp->text)) {
302 if ((argc > 0) && (perform(argc, argv) != 0)) {
304 printf("%s: %s\n", argv[0], command_errmsg);
305 if (!(sp->flags & SL_IGNOREERR)) {
313 printf("%s line %d: parse error\n", filename, sp->line);
323 bf_vm->sourceID.i = prevsrcid;
325 while(script != NULL) {
327 script = script->next;
334 * Emit the current prompt; use the same syntax as the parser
335 * for embedding environment variables.
340 char *pr, *p, *cp, *ev;
342 if ((cp = getenv("prompt")) == NULL)
347 if ((*p == '$') && (*(p+1) == '{')) {
348 for (cp = p + 2; (*cp != 0) && (*cp != '}'); cp++)