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"
40 #define RETURN(x) return(x)
42 #define MAXARGS 20 /* maximum number of arguments allowed */
44 static void prompt(void);
46 static int perform(int argc, char *argv[]);
52 perform(int argc, char *argv[])
55 struct bootblk_command **cmdp;
61 /* set return defaults; a successful command will override these */
62 command_errmsg = command_errbuf;
63 strcpy(command_errbuf, "no error message");
67 /* search the command set for the command */
68 SET_FOREACH(cmdp, Xcommand_set) {
69 if (((*cmdp)->c_name != NULL) && !strcmp(argv[0], (*cmdp)->c_name))
73 result = (cmd)(argc, argv);
75 command_errmsg = "unknown command";
86 char input[256]; /* big enough? */
91 * We may be booting from the boot partition, or we may be booting
92 * from the root partition with a /boot sub-directory. If the latter
93 * chdir into /boot. Ignore any error. Only rel_open() uses the chdir
99 * Read our default configuration
101 if(include("loader.rc")!=CMD_OK)
102 include("boot.conf");
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));
123 if (!parse(&argc, &argv, input)) {
124 if (perform(argc, argv))
125 printf("%s: %s\n", argv[0], command_errmsg);
128 printf("parse error\n");
134 * Read commands from a file, then execute them.
136 * We store the commands in memory and close the source file so that the media
137 * holding it can safely go away while we are executing.
139 * Commands may be prefixed with '@' (so they aren't displayed) or '-' (so
140 * that the script won't stop if they fail).
142 COMMAND_SET(include, "include", "read commands from a file", command_include);
145 command_include(int argc, char *argv[])
152 * Since argv is static, we need to save it here.
154 argvbuf = (char**) calloc((u_int)argc, sizeof(char*));
155 for (i = 0; i < argc; i++)
156 argvbuf[i] = strdup(argv[i]);
159 for (i = 1; (i < argc) && (res == CMD_OK); i++)
160 res = include(argvbuf[i]);
162 for (i = 0; i < argc; i++)
174 #define SL_QUIET (1<<0)
175 #define SL_IGNOREERR (1<<1)
176 struct includeline *next;
180 include(const char *filename)
182 struct includeline *script, *se, *sp;
183 char input[256]; /* big enough? */
188 if (((fd = rel_open(filename, NULL, O_RDONLY)) == -1)) {
189 sprintf(command_errbuf,"can't open '%s': %s\n",
190 filename, strerror(errno));
195 * Read the script into memory.
200 while (fgetstr(input, sizeof(input), fd) >= 0) {
203 /* Discard comments */
204 if (strncmp(input+strspn(input, " "), "\\ ", 2) == 0)
208 if (input[0] == '@') {
213 if (input[0] == '-') {
215 flags |= SL_IGNOREERR;
217 /* Allocate script line structure and copy line, flags */
218 sp = malloc(sizeof(struct includeline) + strlen(cp) + 1);
219 sp->text = (char *)sp + sizeof(struct includeline);
220 strcpy(sp->text, cp);
225 if (script == NULL) {
239 for (sp = script; sp != NULL; sp = sp->next) {
241 /* print if not being quiet */
242 if (!(sp->flags & SL_QUIET)) {
244 printf("%s\n", sp->text);
247 /* Parse the command */
248 if (!parse(&argc, &argv, sp->text)) {
249 if ((argc > 0) && (perform(argc, argv) != 0)) {
251 printf("%s: %s\n", argv[0], command_errmsg);
252 if (!(sp->flags & SL_IGNOREERR)) {
260 printf("%s line %d: parse error\n", filename, sp->line);
267 while(script != NULL) {
269 script = script->next;
276 * Emit the current prompt; use the same syntax as the parser
277 * for embedding environment variables.
282 char *pr, *p, *cp, *ev;
284 if ((cp = getenv("prompt")) == NULL)
289 if ((*p == '$') && (*(p+1) == '{')) {
290 for (cp = p + 2; (*cp != 0) && (*cp != '}'); cp++)