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
++)