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
26 * $FreeBSD: src/sys/boot/common/interp.c,v 1.29 2003/08/25 23:30:41 obrien Exp $
27 * $DragonFly: src/sys/boot/common/interp.c,v 1.4 2008/09/02 17:21:12 dillon Exp $
31 * Simple commandline interpreter, toplevel and misc.
33 * XXX may be obsoleted by BootFORTH or some other, better, interpreter.
38 #include "bootstrap.h"
42 #define RETURN(x) stackPushINT(bf_vm->pStack,!x); return(x)
44 extern FICL_VM *bf_vm;
46 #define RETURN(x) return(x)
49 #define MAXARGS 20 /* maximum number of arguments allowed */
51 static void prompt(void);
54 static int perform(int argc, char *argv[]);
60 perform(int argc, char *argv[])
63 struct bootblk_command **cmdp;
69 /* set return defaults; a successful command will override these */
70 command_errmsg = command_errbuf;
71 strcpy(command_errbuf, "no error message");
75 /* search the command set for the command */
76 SET_FOREACH(cmdp, Xcommand_set) {
77 if (((*cmdp)->c_name != NULL) && !strcmp(argv[0], (*cmdp)->c_name))
81 result = (cmd)(argc, argv);
83 command_errmsg = "unknown command";
87 #endif /* ! BOOT_FORTH */
95 char input[256]; /* big enough? */
106 * We may be booting from the boot partition, or we may be booting
107 * from the root partition with a /boot sub-directory. If the latter
108 * chdir into /boot. Ignore any error. Only rel_open() uses the chdir
114 * Read our default configuration
116 if(include("loader.rc")!=CMD_OK)
117 include("boot.conf");
120 * Before interacting, we might want to autoboot.
125 * Not autobooting, go manual
127 printf("\nType '?' for a list of commands, 'help' for more detailed help.\n");
128 if (getenv("prompt") == NULL)
129 setenv("prompt", "${interpret}", 1);
130 if (getenv("interpret") == NULL)
131 setenv("interpret", "OK", 1);
137 ngets(input, sizeof(input));
139 bf_vm->sourceID.i = 0;
142 if (!parse(&argc, &argv, input)) {
143 if (perform(argc, argv))
144 printf("%s: %s\n", argv[0], command_errmsg);
147 printf("parse error\n");
154 * Read commands from a file, then execute them.
156 * We store the commands in memory and close the source file so that the media
157 * holding it can safely go away while we are executing.
159 * Commands may be prefixed with '@' (so they aren't displayed) or '-' (so
160 * that the script won't stop if they fail).
162 COMMAND_SET(include, "include", "read commands from a file", command_include);
165 command_include(int argc, char *argv[])
172 * Since argv is static, we need to save it here.
174 argvbuf = (char**) calloc((u_int)argc, sizeof(char*));
175 for (i = 0; i < argc; i++)
176 argvbuf[i] = strdup(argv[i]);
179 for (i = 1; (i < argc) && (res == CMD_OK); i++)
180 res = include(argvbuf[i]);
182 for (i = 0; i < argc; i++)
194 #define SL_QUIET (1<<0)
195 #define SL_IGNOREERR (1<<1)
196 struct includeline *next;
200 include(const char *filename)
202 struct includeline *script, *se, *sp;
203 char input[256]; /* big enough? */
207 int prevsrcid, fd, line;
214 if (((fd = rel_open(filename, O_RDONLY)) == -1)) {
215 sprintf(command_errbuf,"can't open '%s': %s\n", filename, strerror(errno));
220 * Read the script into memory.
225 while (fgetstr(input, sizeof(input), fd) >= 0) {
231 /* Discard comments */
232 if (strncmp(input+strspn(input, " "), "\\ ", 2) == 0)
236 if (input[0] == '@') {
241 if (input[0] == '-') {
243 flags |= SL_IGNOREERR;
246 /* Allocate script line structure and copy line, flags */
247 sp = malloc(sizeof(struct includeline) + strlen(cp) + 1);
248 sp->text = (char *)sp + sizeof(struct includeline);
249 strcpy(sp->text, cp);
256 if (script == NULL) {
271 prevsrcid = bf_vm->sourceID.i;
272 bf_vm->sourceID.i = fd;
275 for (sp = script; sp != NULL; sp = sp->next) {
278 res = bf_run(sp->text);
279 if (res != VM_OUTOFTEXT) {
280 sprintf(command_errbuf, "Error while including %s, in the line:\n%s", filename, sp->text);
286 /* print if not being quiet */
287 if (!(sp->flags & SL_QUIET)) {
289 printf("%s\n", sp->text);
292 /* Parse the command */
293 if (!parse(&argc, &argv, sp->text)) {
294 if ((argc > 0) && (perform(argc, argv) != 0)) {
296 printf("%s: %s\n", argv[0], command_errmsg);
297 if (!(sp->flags & SL_IGNOREERR)) {
305 printf("%s line %d: parse error\n", filename, sp->line);
315 bf_vm->sourceID.i = prevsrcid;
317 while(script != NULL) {
319 script = script->next;
326 * Emit the current prompt; use the same syntax as the parser
327 * for embedding environment variables.
332 char *pr, *p, *cp, *ev;
334 if ((cp = getenv("prompt")) == NULL)
339 if ((*p == '$') && (*(p+1) == '{')) {
340 for (cp = p + 2; (*cp != 0) && (*cp != '}'); cp++)