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.
36 #include "bootstrap.h"
39 static void prompt(void);
40 static int iseol(char c);
41 static void skipeol(int fd);
47 perform(int argc, char *argv[])
50 struct bootblk_command **cmdp;
59 if ((ptr = strchr(av0, '=')) != NULL)
62 /* set return defaults; a successful command will override these */
63 command_errmsg = command_errbuf;
64 strcpy(command_errbuf, "no error message");
68 /* search the command set for the command */
69 SET_FOREACH(cmdp, Xcommand_set) {
70 if (((*cmdp)->c_name != NULL) && !strcmp(av0, (*cmdp)->c_name)) {
76 if ((*cmdp)->c_cond || CurrentCondition != 0)
77 result = (cmd)(argc, argv);
81 command_errmsg = "unknown command";
92 char input[256]; /* big enough? */
97 * We may be booting from the boot partition, or we may be booting
98 * from the root partition with a /boot sub-directory. If the latter
99 * chdir into /boot. Ignore any error. Only rel_open() uses the chdir
103 setenv("base", DirBase, 1);
106 * Read our default configuration
108 if (include("dloader.rc") != CMD_OK)
109 include("boot.conf");
112 * Before interacting, we might want to autoboot.
119 * Not autobooting, go manual
121 printf("\nType '?' for a list of commands, 'help' for more detailed help.\n");
122 if (getenv("prompt") == NULL)
123 setenv("prompt", "OK", 1);
128 ngets(input, sizeof(input));
129 if (!parse(&argc, &argv, input)) {
130 if (perform(argc, argv))
131 printf("%s: %s\n", argv[0], command_errmsg);
134 printf("parse error\n");
140 * Read commands from a file, then execute them.
142 * We store the commands in memory and close the source file so that the media
143 * holding it can safely go away while we are executing.
145 * Commands may be prefixed with '@' (so they aren't displayed) or '-' (so
146 * that the script won't stop if they fail).
148 COMMAND_SET(include, "include", "run commands from file", command_include);
151 command_include(int argc, char *argv[])
158 * Since argv is static, we need to save it here.
160 argvbuf = (char**) calloc((u_int)argc, sizeof(char*));
161 for (i = 0; i < argc; i++)
162 argvbuf[i] = strdup(argv[i]);
165 for (i = 1; (i < argc) && (res == CMD_OK); i++)
166 res = include(argvbuf[i]);
168 for (i = 0; i < argc; i++)
175 COMMAND_SET(optinclude, "optinclude",
176 "run commands from file; ignore exit status",
180 command_optinclude(int argc, char *argv[])
186 * Since argv is static, we need to save it here.
188 argvbuf = (char**) calloc((u_int)argc, sizeof(char*));
189 for (i = 0; i < argc; i++)
190 argvbuf[i] = strdup(argv[i]);
192 for (i = 1; (i < argc); i++)
195 for (i = 0; i < argc; i++)
207 #define SL_QUIET (1<<0)
208 #define SL_IGNOREERR (1<<1)
209 struct includeline *next;
213 include(const char *filename)
215 struct includeline *script, *se, *sp;
216 char input[256]; /* big enough? */
221 if (((fd = rel_open(filename, NULL, O_RDONLY)) == -1)) {
222 command_errmsg = command_errbuf;
223 snprintf(command_errbuf, 256, "cannot find \"%s\"", filename);
228 * Read the script into memory.
233 while (fgets(input, sizeof(input), fd) != NULL) {
236 if(strlen(input) == sizeof(input) - 1 &&
237 !iseol(input[sizeof(input) - 2])) {
238 printf("WARNING: %s: %s: Line too long: truncating; have:\n",
240 printf("%s\n", input);
243 /* Discard comments */
244 if (strncmp(input+strspn(input, " "), "\\ ", 2) == 0)
248 if (input[0] == '@') {
253 if (input[0] == '-') {
255 flags |= SL_IGNOREERR;
257 /* Allocate script line structure and copy line, flags */
258 sp = malloc(sizeof(struct includeline) + strlen(cp) + 1);
259 sp->text = (char *)sp + sizeof(struct includeline);
260 strcpy(sp->text, cp);
265 if (script == NULL) {
279 for (sp = script; sp != NULL; sp = sp->next) {
282 /* print if not being quiet */
283 if (!(sp->flags & SL_QUIET)) {
285 printf("%s\n", sp->text);
289 /* Parse the command */
290 if (!parse(&argc, &argv, sp->text)) {
291 if ((argc > 0) && (perform(argc, argv) != 0)) {
293 printf("%s: %s\n", argv[0], command_errmsg);
294 if (!(sp->flags & SL_IGNOREERR)) {
302 printf("%s line %d: parse error\n", filename, sp->line);
309 while(script != NULL) {
311 script = script->next;
318 * Emit the current prompt; use the same syntax as the parser
319 * for embedding environment variables.
324 char *pr, *p, *cp, *ev;
326 if ((cp = getenv("prompt")) == NULL)
331 if ((*p == '$') && (*(p+1) == '{')) {
332 for (cp = p + 2; (*cp != 0) && (*cp != '}'); cp++)
351 return(c == '\n' || c == '\r');
359 while (read(fd, &c, 1) == 1) {