interp.c revision 1.1.2.4
1 1.1.2.4 yamt /* $NetBSD: interp.c,v 1.1.2.4 2006/08/11 15:42:00 yamt Exp $ */ 2 1.1.2.2 yamt 3 1.1.2.2 yamt /*- 4 1.1.2.2 yamt * Copyright (c) 1998 Michael Smith <msmith (at) freebsd.org> 5 1.1.2.2 yamt * All rights reserved. 6 1.1.2.2 yamt * 7 1.1.2.2 yamt * Redistribution and use in source and binary forms, with or without 8 1.1.2.2 yamt * modification, are permitted provided that the following conditions 9 1.1.2.2 yamt * are met: 10 1.1.2.2 yamt * 1. Redistributions of source code must retain the above copyright 11 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer. 12 1.1.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer in the 14 1.1.2.2 yamt * documentation and/or other materials provided with the distribution. 15 1.1.2.2 yamt * 16 1.1.2.2 yamt * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 1.1.2.2 yamt * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 1.1.2.2 yamt * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 1.1.2.2 yamt * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 1.1.2.2 yamt * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 1.1.2.2 yamt * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 1.1.2.2 yamt * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 1.1.2.2 yamt * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 1.1.2.2 yamt * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.1.2.2 yamt * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.1.2.2 yamt * SUCH DAMAGE. 27 1.1.2.2 yamt */ 28 1.1.2.2 yamt 29 1.1.2.2 yamt #include <sys/cdefs.h> 30 1.1.2.3 yamt /* __FBSDID("$FreeBSD: src/sys/boot/common/interp.c,v 1.29 2003/08/25 23:30:41 obrien Exp $"); */ 31 1.1.2.2 yamt 32 1.1.2.2 yamt /* 33 1.1.2.2 yamt * Simple commandline interpreter, toplevel and misc. 34 1.1.2.2 yamt * 35 1.1.2.2 yamt * XXX may be obsoleted by BootFORTH or some other, better, interpreter. 36 1.1.2.2 yamt */ 37 1.1.2.2 yamt 38 1.1.2.2 yamt #include <lib/libsa/stand.h> 39 1.1.2.2 yamt 40 1.1.2.2 yamt #include "bootstrap.h" 41 1.1.2.2 yamt 42 1.1.2.2 yamt #ifdef BOOT_FORTH 43 1.1.2.2 yamt #include "ficl.h" 44 1.1.2.2 yamt #define RETURN(x) stackPushINT(bf_vm->pStack,!x); return(x) 45 1.1.2.2 yamt 46 1.1.2.2 yamt extern FICL_VM *bf_vm; 47 1.1.2.2 yamt #else 48 1.1.2.2 yamt #define RETURN(x) return(x) 49 1.1.2.2 yamt #endif 50 1.1.2.2 yamt 51 1.1.2.2 yamt #define MAXARGS 20 /* maximum number of arguments allowed */ 52 1.1.2.2 yamt 53 1.1.2.2 yamt static void prompt(void); 54 1.1.2.2 yamt 55 1.1.2.2 yamt #ifndef BOOT_FORTH 56 1.1.2.2 yamt static int perform(int argc, char *argv[]); 57 1.1.2.2 yamt 58 1.1.2.2 yamt /* 59 1.1.2.2 yamt * Perform the command 60 1.1.2.2 yamt */ 61 1.1.2.2 yamt int 62 1.1.2.2 yamt perform(int argc, char *argv[]) 63 1.1.2.2 yamt { 64 1.1.2.2 yamt int result; 65 1.1.2.2 yamt struct bootblk_command *cmdp; 66 1.1.2.2 yamt bootblk_cmd_t *cmd; 67 1.1.2.2 yamt 68 1.1.2.2 yamt int i; 69 1.1.2.2 yamt 70 1.1.2.2 yamt if (argc < 1) 71 1.1.2.2 yamt return(CMD_OK); 72 1.1.2.2 yamt 73 1.1.2.2 yamt /* set return defaults; a successful command will override these */ 74 1.1.2.2 yamt command_errmsg = command_errbuf; 75 1.1.2.2 yamt strcpy(command_errbuf, "no error message"); 76 1.1.2.2 yamt cmd = NULL; 77 1.1.2.2 yamt result = CMD_ERROR; 78 1.1.2.2 yamt 79 1.1.2.2 yamt /* search the command set for the command */ 80 1.1.2.2 yamt for (i = 0, cmdp = commands; (cmdp->c_name != NULL) && (cmdp->c_desc != NULL ); i++, cmdp = commands + i) { 81 1.1.2.2 yamt if ((cmdp->c_name != NULL) && !strcmp(argv[0], cmdp->c_name)) 82 1.1.2.2 yamt cmd = cmdp->c_fn; 83 1.1.2.2 yamt } 84 1.1.2.2 yamt if (cmd != NULL) { 85 1.1.2.2 yamt result = (cmd)(argc, argv); 86 1.1.2.2 yamt } else { 87 1.1.2.2 yamt command_errmsg = "unknown command"; 88 1.1.2.2 yamt } 89 1.1.2.2 yamt RETURN(result); 90 1.1.2.2 yamt } 91 1.1.2.2 yamt #endif /* ! BOOT_FORTH */ 92 1.1.2.2 yamt 93 1.1.2.2 yamt /* 94 1.1.2.2 yamt * Interactive mode 95 1.1.2.2 yamt */ 96 1.1.2.2 yamt void 97 1.1.2.2 yamt interact(void) 98 1.1.2.2 yamt { 99 1.1.2.2 yamt char input[256]; /* big enough? */ 100 1.1.2.2 yamt #ifndef BOOT_FORTH 101 1.1.2.2 yamt int argc; 102 1.1.2.2 yamt char **argv; 103 1.1.2.2 yamt #endif 104 1.1.2.2 yamt 105 1.1.2.2 yamt #ifdef BOOT_FORTH 106 1.1.2.2 yamt bf_init(); 107 1.1.2.2 yamt #endif 108 1.1.2.2 yamt 109 1.1.2.2 yamt /* 110 1.1.2.2 yamt * Read our default configuration 111 1.1.2.2 yamt */ 112 1.1.2.2 yamt if(include("/boot/loader.rc")!=CMD_OK) 113 1.1.2.2 yamt include("/boot/boot.conf"); 114 1.1.2.2 yamt printf("\n"); 115 1.1.2.4 yamt 116 1.1.2.2 yamt /* 117 1.1.2.4 yamt * XXX: Before interacting, we might want to autoboot. 118 1.1.2.2 yamt */ 119 1.1.2.4 yamt 120 1.1.2.2 yamt 121 1.1.2.2 yamt /* 122 1.1.2.2 yamt * Not autobooting, go manual 123 1.1.2.2 yamt */ 124 1.1.2.2 yamt printf("\nType '?' for a list of commands, 'help' for more detailed help.\n"); 125 1.1.2.2 yamt if (getenv("prompt") == NULL) 126 1.1.2.2 yamt setenv("prompt", "${interpret}", 1); 127 1.1.2.2 yamt if (getenv("interpret") == NULL) 128 1.1.2.2 yamt setenv("interpret", "OK", 1); 129 1.1.2.2 yamt 130 1.1.2.2 yamt 131 1.1.2.2 yamt for (;;) { 132 1.1.2.2 yamt input[0] = '\0'; 133 1.1.2.2 yamt prompt(); 134 1.1.2.2 yamt ngets(input, sizeof(input)); 135 1.1.2.2 yamt #ifdef BOOT_FORTH 136 1.1.2.2 yamt bf_vm->sourceID.i = 0; 137 1.1.2.2 yamt bf_run(input); 138 1.1.2.2 yamt #else 139 1.1.2.2 yamt if (!parse(&argc, &argv, input)) { 140 1.1.2.2 yamt if (perform(argc, argv)) 141 1.1.2.2 yamt printf("%s: %s\n", argv[0], command_errmsg); 142 1.1.2.2 yamt free(argv); 143 1.1.2.2 yamt } else { 144 1.1.2.2 yamt printf("parse error\n"); 145 1.1.2.2 yamt } 146 1.1.2.2 yamt #endif 147 1.1.2.2 yamt } 148 1.1.2.2 yamt } 149 1.1.2.2 yamt 150 1.1.2.2 yamt /* 151 1.1.2.2 yamt * Read commands from a file, then execute them. 152 1.1.2.2 yamt * 153 1.1.2.2 yamt * We store the commands in memory and close the source file so that the media 154 1.1.2.2 yamt * holding it can safely go away while we are executing. 155 1.1.2.2 yamt * 156 1.1.2.2 yamt * Commands may be prefixed with '@' (so they aren't displayed) or '-' (so 157 1.1.2.2 yamt * that the script won't stop if they fail). 158 1.1.2.2 yamt */ 159 1.1.2.2 yamt 160 1.1.2.2 yamt int 161 1.1.2.2 yamt command_include(int argc, char *argv[]) 162 1.1.2.2 yamt { 163 1.1.2.2 yamt int i; 164 1.1.2.2 yamt int res; 165 1.1.2.2 yamt char **argvbuf; 166 1.1.2.2 yamt 167 1.1.2.2 yamt /* 168 1.1.2.2 yamt * Since argv is static, we need to save it here. 169 1.1.2.2 yamt */ 170 1.1.2.2 yamt argvbuf = (char**) calloc((u_int)argc, sizeof(char*)); 171 1.1.2.2 yamt for (i = 0; i < argc; i++) 172 1.1.2.2 yamt argvbuf[i] = strdup(argv[i]); 173 1.1.2.2 yamt 174 1.1.2.2 yamt res=CMD_OK; 175 1.1.2.2 yamt for (i = 1; (i < argc) && (res == CMD_OK); i++) 176 1.1.2.2 yamt res = include(argvbuf[i]); 177 1.1.2.2 yamt 178 1.1.2.2 yamt for (i = 0; i < argc; i++) 179 1.1.2.2 yamt free(argvbuf[i]); 180 1.1.2.2 yamt free(argvbuf); 181 1.1.2.2 yamt 182 1.1.2.2 yamt return(res); 183 1.1.2.2 yamt } 184 1.1.2.2 yamt 185 1.1.2.2 yamt struct includeline 186 1.1.2.2 yamt { 187 1.1.2.2 yamt char *text; 188 1.1.2.2 yamt int flags; 189 1.1.2.2 yamt int line; 190 1.1.2.2 yamt #define SL_QUIET (1<<0) 191 1.1.2.2 yamt #define SL_IGNOREERR (1<<1) 192 1.1.2.2 yamt struct includeline *next; 193 1.1.2.2 yamt }; 194 1.1.2.2 yamt 195 1.1.2.2 yamt int 196 1.1.2.2 yamt include(const char *filename) 197 1.1.2.2 yamt { 198 1.1.2.2 yamt struct includeline *script, *se, *sp; 199 1.1.2.2 yamt char input[256]; /* big enough? */ 200 1.1.2.2 yamt #ifdef BOOT_FORTH 201 1.1.2.2 yamt int res; 202 1.1.2.2 yamt char *cp; 203 1.1.2.2 yamt int prevsrcid, fd, line; 204 1.1.2.2 yamt #else 205 1.1.2.2 yamt int argc,res; 206 1.1.2.2 yamt char **argv, *cp; 207 1.1.2.2 yamt int fd, flags, line; 208 1.1.2.2 yamt #endif 209 1.1.2.2 yamt 210 1.1.2.2 yamt if (((fd = open(filename, O_RDONLY)) == -1)) { 211 1.1.2.2 yamt sprintf(command_errbuf,"can't open '%s': %s\n", filename, strerror(errno)); 212 1.1.2.2 yamt return(CMD_ERROR); 213 1.1.2.2 yamt } 214 1.1.2.2 yamt 215 1.1.2.2 yamt /* 216 1.1.2.2 yamt * Read the script into memory. 217 1.1.2.2 yamt */ 218 1.1.2.2 yamt script = se = NULL; 219 1.1.2.2 yamt line = 0; 220 1.1.2.2 yamt 221 1.1.2.2 yamt while (fgetstr(input, sizeof(input), fd) >= 0) { 222 1.1.2.2 yamt line++; 223 1.1.2.2 yamt #ifdef BOOT_FORTH 224 1.1.2.2 yamt cp = input; 225 1.1.2.2 yamt #else 226 1.1.2.2 yamt flags = 0; 227 1.1.2.2 yamt /* Discard comments */ 228 1.1.2.2 yamt if (strncmp(input+strspn(input, " "), "\\ ", 2) == 0) 229 1.1.2.2 yamt continue; 230 1.1.2.2 yamt cp = input; 231 1.1.2.2 yamt /* Echo? */ 232 1.1.2.2 yamt if (input[0] == '@') { 233 1.1.2.2 yamt cp++; 234 1.1.2.2 yamt flags |= SL_QUIET; 235 1.1.2.2 yamt } 236 1.1.2.2 yamt /* Error OK? */ 237 1.1.2.2 yamt if (input[0] == '-') { 238 1.1.2.2 yamt cp++; 239 1.1.2.2 yamt flags |= SL_IGNOREERR; 240 1.1.2.2 yamt } 241 1.1.2.2 yamt #endif 242 1.1.2.2 yamt /* Allocate script line structure and copy line, flags */ 243 1.1.2.2 yamt sp = alloc(sizeof(struct includeline) + strlen(cp) + 1); 244 1.1.2.2 yamt sp->text = (char *)sp + sizeof(struct includeline); 245 1.1.2.2 yamt strcpy(sp->text, cp); 246 1.1.2.2 yamt #ifndef BOOT_FORTH 247 1.1.2.2 yamt sp->flags = flags; 248 1.1.2.2 yamt #endif 249 1.1.2.2 yamt sp->line = line; 250 1.1.2.2 yamt sp->next = NULL; 251 1.1.2.2 yamt 252 1.1.2.2 yamt if (script == NULL) { 253 1.1.2.2 yamt script = sp; 254 1.1.2.2 yamt } else { 255 1.1.2.2 yamt se->next = sp; 256 1.1.2.2 yamt } 257 1.1.2.2 yamt se = sp; 258 1.1.2.2 yamt } 259 1.1.2.2 yamt close(fd); 260 1.1.2.2 yamt 261 1.1.2.2 yamt /* 262 1.1.2.2 yamt * Execute the script 263 1.1.2.2 yamt */ 264 1.1.2.2 yamt #ifndef BOOT_FORTH 265 1.1.2.2 yamt argv = NULL; 266 1.1.2.2 yamt #else 267 1.1.2.2 yamt prevsrcid = bf_vm->sourceID.i; 268 1.1.2.2 yamt bf_vm->sourceID.i = fd; 269 1.1.2.2 yamt #endif 270 1.1.2.2 yamt res = CMD_OK; 271 1.1.2.2 yamt for (sp = script; sp != NULL; sp = sp->next) { 272 1.1.2.2 yamt 273 1.1.2.2 yamt #ifdef BOOT_FORTH 274 1.1.2.2 yamt res = bf_run(sp->text); 275 1.1.2.2 yamt if (res != VM_OUTOFTEXT) { 276 1.1.2.2 yamt sprintf(command_errbuf, "Error while including %s, in the line:\n%s", filename, sp->text); 277 1.1.2.2 yamt res = CMD_ERROR; 278 1.1.2.2 yamt break; 279 1.1.2.2 yamt } else 280 1.1.2.2 yamt res = CMD_OK; 281 1.1.2.2 yamt #else 282 1.1.2.2 yamt /* print if not being quiet */ 283 1.1.2.2 yamt if (!(sp->flags & SL_QUIET)) { 284 1.1.2.2 yamt prompt(); 285 1.1.2.2 yamt printf("%s\n", sp->text); 286 1.1.2.2 yamt } 287 1.1.2.2 yamt 288 1.1.2.2 yamt /* Parse the command */ 289 1.1.2.2 yamt if (!parse(&argc, &argv, sp->text)) { 290 1.1.2.2 yamt if ((argc > 0) && (perform(argc, argv) != 0)) { 291 1.1.2.2 yamt /* normal command */ 292 1.1.2.2 yamt printf("%s: %s\n", argv[0], command_errmsg); 293 1.1.2.2 yamt if (!(sp->flags & SL_IGNOREERR)) { 294 1.1.2.2 yamt res=CMD_ERROR; 295 1.1.2.2 yamt break; 296 1.1.2.2 yamt } 297 1.1.2.2 yamt } 298 1.1.2.2 yamt free(argv); 299 1.1.2.2 yamt argv = NULL; 300 1.1.2.2 yamt } else { 301 1.1.2.2 yamt printf("%s line %d: parse error\n", filename, sp->line); 302 1.1.2.2 yamt res=CMD_ERROR; 303 1.1.2.2 yamt break; 304 1.1.2.2 yamt } 305 1.1.2.2 yamt #endif 306 1.1.2.2 yamt } 307 1.1.2.2 yamt #ifndef BOOT_FORTH 308 1.1.2.2 yamt if (argv != NULL) 309 1.1.2.2 yamt free(argv); 310 1.1.2.2 yamt #else 311 1.1.2.2 yamt bf_vm->sourceID.i = prevsrcid; 312 1.1.2.2 yamt #endif 313 1.1.2.2 yamt while(script != NULL) { 314 1.1.2.2 yamt se = script; 315 1.1.2.2 yamt script = script->next; 316 1.1.2.2 yamt free(se); 317 1.1.2.2 yamt } 318 1.1.2.2 yamt return(res); 319 1.1.2.2 yamt } 320 1.1.2.2 yamt 321 1.1.2.2 yamt /* 322 1.1.2.2 yamt * Emit the current prompt; use the same syntax as the parser 323 1.1.2.2 yamt * for embedding environment variables. 324 1.1.2.2 yamt */ 325 1.1.2.2 yamt static void 326 1.1.2.2 yamt prompt(void) 327 1.1.2.2 yamt { 328 1.1.2.2 yamt char *pr, *p, *cp, *ev; 329 1.1.2.2 yamt 330 1.1.2.2 yamt if ((cp = getenv("prompt")) == NULL) 331 1.1.2.2 yamt cp = ">"; 332 1.1.2.2 yamt pr = p = strdup(cp); 333 1.1.2.2 yamt 334 1.1.2.2 yamt while (*p != 0) { 335 1.1.2.2 yamt if ((*p == '$') && (*(p+1) == '{')) { 336 1.1.2.2 yamt for (cp = p + 2; (*cp != 0) && (*cp != '}'); cp++) 337 1.1.2.2 yamt ; 338 1.1.2.2 yamt *cp = 0; 339 1.1.2.2 yamt ev = getenv(p + 2); 340 1.1.2.2 yamt 341 1.1.2.2 yamt if (ev != NULL) 342 1.1.2.2 yamt printf("%s", ev); 343 1.1.2.2 yamt p = cp + 1; 344 1.1.2.2 yamt continue; 345 1.1.2.2 yamt } 346 1.1.2.2 yamt putchar(*p++); 347 1.1.2.2 yamt } 348 1.1.2.2 yamt putchar(' '); 349 1.1.2.2 yamt free(pr); 350 1.1.2.2 yamt } 351
Indexes created Sat Oct 11 19:10:01 GMT 2025