/*- * Copyright (c) 1998 Michael Smith * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $Id: interp.c,v 1.8 1998/11/04 00:29:01 msmith Exp $ */ /* * Simple commandline interpreter, toplevel and misc. * * XXX may be obsoleted by BootFORTH or some other, better, interpreter. */ #include #include #include "bootstrap.h" #ifdef BOOT_FORTH #include "ficl.h" #define RETURN(x) stackPushINT32(bf_vm->pStack,!x); return(x) extern FICL_VM *bf_vm; #else #define RETURN(x) return(x) #endif #define MAXARGS 20 /* maximum number of arguments allowed */ static void prompt(void); /* * Perform the command */ int perform(int argc, char *argv[]) { int i, result; struct bootblk_command **cmdp; bootblk_cmd_t *cmd; if (argc < 1) return(CMD_OK); /* set return defaults; a successful command will override these */ command_errmsg = command_errbuf; strcpy(command_errbuf, "no error message"); cmd = NULL; result = CMD_ERROR; /* search the command set for the command */ SET_FOREACH(cmdp, Xcommand_set) { if (((*cmdp)->c_name != NULL) && !strcmp(argv[0], (*cmdp)->c_name)) cmd = (*cmdp)->c_fn; } if (cmd != NULL) { result = (cmd)(argc, argv); } else { command_errmsg = "unknown command"; } RETURN(result); } /* * Interactive mode */ void interact(void) { char input[256]; /* big enough? */ int argc; char **argv; #ifdef BOOT_FORTH bf_init(); #endif /* * Read our default configuration */ source("/boot/boot.conf"); printf("\n"); /* * Before interacting, we might want to autoboot. */ autoboot_maybe(); /* * Not autobooting, go manual */ printf("\nType '?' for a list of commands, 'help' for more detailed help.\n"); setenv("prompt", "${currdev}>", 1); for (;;) { input[0] = '\0'; prompt(); ngets(input, sizeof(input)); #ifdef BOOT_FORTH bf_run(input); #else if (!parse(&argc, &argv, input)) { if (perform(argc, argv)) printf("%s: %s\n", argv[0], command_errmsg); free(argv); } else { printf("parse error\n"); } #endif } } /* * Read commands from a file, then execute them. * * We store the commands in memory and close the source file so that the media * holding it can safely go away while we are executing. * * Commands may be prefixed with '@' (so they aren't displayed) or '-' (so * that the script won't stop if they fail). */ COMMAND_SET(source, "source", "read commands from a file", command_source); static int command_source(int argc, char *argv[]) { int i; for (i = 1; i < argc; i++) source(argv[i]); RETURN(CMD_OK); } struct sourceline { char *text; int flags; int line; #define SL_QUIET (1<<0) #define SL_IGNOREERR (1<<1) struct sourceline *next; }; void source(char *filename) { struct sourceline *script, *se, *sp; char input[256]; /* big enough? */ int argc; char **argv, *cp; int fd, flags, line; if (((fd = open(filename, O_RDONLY)) == -1)) { printf("can't open '%s': %s\n", filename, strerror(errno)); return; } /* * Read the script into memory. */ script = se = NULL; line = 0; while (fgetstr(input, sizeof(input), fd) > 0) { line++; flags = 0; /* Discard comments */ if (input[0] == '#') continue; cp = input; /* Echo? */ if (input[0] == '@') { cp++; flags |= SL_QUIET; } /* Error OK? */ if (input[0] == '-') { cp++; flags |= SL_IGNOREERR; } /* Allocate script line structure and copy line, flags */ sp = malloc(sizeof(struct sourceline) + strlen(cp) + 1); sp->text = (char *)sp + sizeof(struct sourceline); strcpy(sp->text, cp); sp->flags = flags; sp->line = line; sp->next = NULL; if (script == NULL) { script = sp; } else { se->next = sp; } se = sp; } close(fd); /* * Execute the script */ argv = NULL; for (sp = script; sp != NULL; sp = sp->next) { /* print if not being quiet */ if (!(sp->flags & SL_QUIET)) { prompt(); printf("%s\n", sp->text); } /* Parse the command */ if (!parse(&argc, &argv, sp->text)) { if ((argc > 0) && (perform(argc, argv) != 0)) { /* normal command */ printf("%s: %s\n", argv[0], command_errmsg); if (!(sp->flags & SL_IGNOREERR)) break; } free(argv); argv = NULL; } else { printf("%s line %d: parse error\n", filename, sp->line); break; } } if (argv != NULL) free(argv); while(script != NULL) { se = script; script = script->next; free(se); } } /* * Emit the current prompt; use the same syntax as the parser * for embedding environment variables. */ static void prompt(void) { char *p, *cp, *ev; if ((cp = getenv("prompt")) == NULL) cp = ">"; p = strdup(cp); while (*p != 0) { if ((*p == '$') && (*(p+1) == '{')) { for (cp = p + 2; (*cp != 0) && (*cp != '}'); cp++) ; *cp = 0; ev = getenv(p + 2); if (ev != NULL) printf(ev); p = cp + 1; continue; } putchar(*p++); } putchar(' '); }