| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * Invoke a Lisp script |
| 4 | * |
| 5 | * (c) 2020 Mark Wooding |
| 6 | */ |
| 7 | |
| 8 | /*----- Licensing notice --------------------------------------------------* |
| 9 | * |
| 10 | * This file is part of Runlisp, a tool for invoking Common Lisp scripts. |
| 11 | * |
| 12 | * Runlisp is free software: you can redistribute it and/or modify it |
| 13 | * under the terms of the GNU General Public License as published by the |
| 14 | * Free Software Foundation; either version 3 of the License, or (at your |
| 15 | * option) any later version. |
| 16 | * |
| 17 | * Runlisp is distributed in the hope that it will be useful, but WITHOUT |
| 18 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 20 | * for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with Runlisp. If not, see <https://www.gnu.org/licenses/>. |
| 24 | */ |
| 25 | |
| 26 | /*----- Header files ------------------------------------------------------*/ |
| 27 | |
| 28 | #include "config.h" |
| 29 | |
| 30 | #include <assert.h> |
| 31 | #include <ctype.h> |
| 32 | #include <errno.h> |
| 33 | #include <stdarg.h> |
| 34 | #include <stdio.h> |
| 35 | #include <stdlib.h> |
| 36 | #include <string.h> |
| 37 | |
| 38 | #include <unistd.h> |
| 39 | #include <sys/stat.h> |
| 40 | |
| 41 | #include <pwd.h> |
| 42 | |
| 43 | /*----- Common Lisp runes -------------------------------------------------*/ |
| 44 | |
| 45 | /* A common preamble rune to do the necessary things. |
| 46 | * |
| 47 | * We need to ensure that `asdf' (and therefore `uiop') is loaded. And we |
| 48 | * should arrange for `:runlisp-script' to find its way into the `*features*' |
| 49 | * list so that scripts can notice that they're being invoked from the |
| 50 | * command line rather than loaded into a resident session, and actually do |
| 51 | * something useful. |
| 52 | */ |
| 53 | #define COMMON_PRELUDE_RUNE \ |
| 54 | "(progn " \ |
| 55 | "(setf *load-verbose* nil *compile-verbose* nil) " \ |
| 56 | "(require \"asdf\") " \ |
| 57 | "(funcall (intern \"REGISTER-IMMUTABLE-SYSTEM\" " \ |
| 58 | "(find-package \"ASDF\")) " \ |
| 59 | "\"asdf\") " \ |
| 60 | "(set-dispatch-macro-character " \ |
| 61 | "#\\# #\\! " \ |
| 62 | "(lambda (#1=#:stream #2=#:char #3=#:arg) " \ |
| 63 | "(declare (ignore #2# #3#)) " \ |
| 64 | "(values (read-line #1#)))) " \ |
| 65 | "(pushnew :runlisp-script *features*))" |
| 66 | |
| 67 | /* Get `uiop' to re-check the command-line arguments following an image |
| 68 | * restore. |
| 69 | */ |
| 70 | #define IMAGE_RESTORE_RUNE \ |
| 71 | "(uiop:call-image-restore-hook)" |
| 72 | |
| 73 | /* Some Lisps leave crud in the `COMMON-LISP-USER' package. Clear it out. */ |
| 74 | #define CLEAR_CL_USER_RUNE \ |
| 75 | "(let ((#4=#:pkg (find-package \"COMMON-LISP-USER\"))) " \ |
| 76 | "(with-package-iterator (#5=#:next #4# :internal) " \ |
| 77 | "(loop (multiple-value-bind (#6=#:anyp #7=#:sym #8=#:how) " \ |
| 78 | "(#5#) " \ |
| 79 | "(declare (ignore #8#)) " \ |
| 80 | "(unless #6# (return)) " \ |
| 81 | "(unintern #7# #4#)))))" |
| 82 | |
| 83 | /*----- Handy macros ------------------------------------------------------*/ |
| 84 | |
| 85 | #define N(v) (sizeof(v)/sizeof((v)[0])) |
| 86 | |
| 87 | #if defined(__GNUC__) |
| 88 | # define GCC_VERSION_P(maj, min) \ |
| 89 | (__GNUC__ > (maj) || (__GNUC__ == (maj) && __GNUC_MINOR__ >= (min))) |
| 90 | #else |
| 91 | # define GCC_VERSION_P(maj, min) 0 |
| 92 | #endif |
| 93 | |
| 94 | #ifdef __clang__ |
| 95 | # define CLANG_VERSION_P(maj, min) \ |
| 96 | (__clang_major__ > (maj) || (__clang_major__ == (maj) && \ |
| 97 | __clang_minor__ >= (min))) |
| 98 | #else |
| 99 | # define CLANG_VERSION_P(maj, min) 0 |
| 100 | #endif |
| 101 | |
| 102 | #if GCC_VERSION_P(2, 5) || CLANG_VERSION_P(3, 3) |
| 103 | # define NORETURN __attribute__((__noreturn__)) |
| 104 | # define PRINTF_LIKE(fix, aix) __attribute__((__format__(printf, fix, aix))) |
| 105 | #endif |
| 106 | |
| 107 | #if GCC_VERSION_P(4, 0) || CLANG_VERSION_P(3, 3) |
| 108 | # define EXECL_LIKE(ntrail) __attribute__((__sentinel__(ntrail))) |
| 109 | #endif |
| 110 | |
| 111 | #define CTYPE_HACK(func, ch) (func((unsigned char)(ch))) |
| 112 | #define ISSPACE(ch) CTYPE_HACK(isspace, ch) |
| 113 | |
| 114 | #define MEMCMP(x, op, y, n) (memcmp((x), (y), (n)) op 0) |
| 115 | #define STRCMP(x, op, y) (strcmp((x), (y)) op 0) |
| 116 | #define STRNCMP(x, op, y, n) (strncmp((x), (y), (n)) op 0) |
| 117 | |
| 118 | #define END ((const char *)0) |
| 119 | |
| 120 | /*----- The Lisp implementation table -------------------------------------*/ |
| 121 | |
| 122 | /* The systems, in decreasing order of (not quite my personal) preference. |
| 123 | * This list is used to initialize various tables and constants. |
| 124 | */ |
| 125 | #define LISP_SYSTEMS(_) \ |
| 126 | _(sbcl) \ |
| 127 | _(ccl) \ |
| 128 | _(clisp) \ |
| 129 | _(ecl) \ |
| 130 | _(cmucl) \ |
| 131 | _(abcl) |
| 132 | |
| 133 | enum { |
| 134 | #define DEFSYS(sys) sys##_INDEX, |
| 135 | LISP_SYSTEMS(DEFSYS) |
| 136 | #undef DEFSYS |
| 137 | NSYS |
| 138 | }; |
| 139 | |
| 140 | enum { |
| 141 | #define DEFFLAG(sys) sys##_FLAG = 1 << sys##_INDEX, |
| 142 | LISP_SYSTEMS(DEFFLAG) |
| 143 | #undef DEFFLAG |
| 144 | ALL_SYSTEMS = 0 |
| 145 | #define SETFLAG(sys) | sys##_FLAG |
| 146 | LISP_SYSTEMS(SETFLAG) |
| 147 | #undef SETFLAG |
| 148 | }; |
| 149 | |
| 150 | struct argstate; |
| 151 | struct argv; |
| 152 | |
| 153 | #define DECLENTRY(sys) \ |
| 154 | static void run_##sys(struct argstate *, const char *); |
| 155 | LISP_SYSTEMS(DECLENTRY) |
| 156 | #undef DECLENTRY |
| 157 | |
| 158 | static const struct systab { |
| 159 | const char *name; |
| 160 | unsigned f; |
| 161 | void (*run)(struct argstate *, const char *); |
| 162 | } systab[] = { |
| 163 | #define SYSENTRY(sys) { #sys, sys##_FLAG, run_##sys }, |
| 164 | LISP_SYSTEMS(SYSENTRY) |
| 165 | #undef SYSENTRY |
| 166 | }; |
| 167 | |
| 168 | /*----- Diagnostic utilities ----------------------------------------------*/ |
| 169 | |
| 170 | static const char *progname = "runlisp"; |
| 171 | |
| 172 | static void set_progname(const char *prog) |
| 173 | { |
| 174 | const char *p; |
| 175 | |
| 176 | p = strrchr(prog, '/'); |
| 177 | progname = p ? p + 1 : progname; |
| 178 | } |
| 179 | |
| 180 | static void vmoan(const char *msg, va_list ap) |
| 181 | { |
| 182 | fprintf(stderr, "%s: ", progname); |
| 183 | vfprintf(stderr, msg, ap); |
| 184 | fputc('\n', stderr); |
| 185 | } |
| 186 | |
| 187 | static PRINTF_LIKE(1, 2) void moan(const char *msg, ...) |
| 188 | { va_list ap; va_start(ap, msg); vmoan(msg, ap); va_end(ap); } |
| 189 | |
| 190 | static NORETURN PRINTF_LIKE(1, 2) void lose(const char *msg, ...) |
| 191 | { va_list ap; va_start(ap, msg); vmoan(msg, ap); va_end(ap); exit(127); } |
| 192 | |
| 193 | /*----- Memory allocation -------------------------------------------------*/ |
| 194 | |
| 195 | static void *xmalloc(size_t n) |
| 196 | { |
| 197 | void *p; |
| 198 | |
| 199 | if (!n) return (0); |
| 200 | p = malloc(n); if (!p) lose("failed to allocate memory"); |
| 201 | return (p); |
| 202 | } |
| 203 | |
| 204 | static void *xrealloc(void *p, size_t n) |
| 205 | { |
| 206 | if (!n) { free(p); return (0); } |
| 207 | else if (!p) return (xmalloc(n)); |
| 208 | p = realloc(p, n); if (!p) lose("failed to allocate memory"); |
| 209 | return (p); |
| 210 | } |
| 211 | |
| 212 | static char *xstrdup(const char *p) |
| 213 | { |
| 214 | size_t n = strlen(p) + 1; |
| 215 | char *q = xmalloc(n); |
| 216 | |
| 217 | memcpy(q, p, n); |
| 218 | return (q); |
| 219 | } |
| 220 | |
| 221 | /*----- Dynamic strings ---------------------------------------------------*/ |
| 222 | |
| 223 | struct dstr { |
| 224 | char *p; |
| 225 | size_t len, sz; |
| 226 | }; |
| 227 | #define DSTR_INIT { 0, 0, 0 } |
| 228 | |
| 229 | /* |
| 230 | static void dstr_init(struct dstr *d) { d->p = 0; d->len = d->sz = 0; } |
| 231 | */ |
| 232 | |
| 233 | static void dstr_reset(struct dstr *d) { d->len = 0; } |
| 234 | |
| 235 | static void dstr_ensure(struct dstr *d, size_t n) |
| 236 | { |
| 237 | size_t need = d->len + n, newsz; |
| 238 | |
| 239 | if (need <= d->sz) return; |
| 240 | newsz = d->sz ? 2*d->sz : 16; |
| 241 | while (newsz < need) newsz *= 2; |
| 242 | d->p = xrealloc(d->p, newsz); d->sz = newsz; |
| 243 | } |
| 244 | |
| 245 | static void dstr_release(struct dstr *d) { free(d->p); } |
| 246 | |
| 247 | static void dstr_putm(struct dstr *d, const void *p, size_t n) |
| 248 | { dstr_ensure(d, n); memcpy(d->p + d->len, p, n); d->len += n; } |
| 249 | |
| 250 | static void dstr_puts(struct dstr *d, const char *p) |
| 251 | { |
| 252 | size_t n = strlen(p); |
| 253 | |
| 254 | dstr_ensure(d, n + 1); |
| 255 | memcpy(d->p + d->len, p, n + 1); |
| 256 | d->len += n; |
| 257 | } |
| 258 | |
| 259 | static void dstr_putc(struct dstr *d, int ch) |
| 260 | { dstr_ensure(d, 1); d->p[d->len++] = ch; } |
| 261 | |
| 262 | static void dstr_putz(struct dstr *d) |
| 263 | { dstr_ensure(d, 1); d->p[d->len] = 0; } |
| 264 | |
| 265 | static int dstr_readline(struct dstr *d, FILE *fp) |
| 266 | { |
| 267 | size_t n; |
| 268 | int any = 0; |
| 269 | |
| 270 | for (;;) { |
| 271 | dstr_ensure(d, 2); |
| 272 | if (!fgets(d->p + d->len, d->sz - d->len, fp)) break; |
| 273 | n = strlen(d->p + d->len); assert(n > 0); any = 1; |
| 274 | d->len += n; |
| 275 | if (d->p[d->len - 1] == '\n') { d->p[--d->len] = 0; break; } |
| 276 | } |
| 277 | |
| 278 | if (!any) return (-1); |
| 279 | else return (0); |
| 280 | } |
| 281 | /*----- Dynamic vectors of strings ----------------------------------------*/ |
| 282 | |
| 283 | struct argv { |
| 284 | const char **v; |
| 285 | size_t o, n, sz; |
| 286 | }; |
| 287 | #define ARGV_INIT { 0, 0, 0, 0 } |
| 288 | |
| 289 | /* |
| 290 | static void argv_init(struct argv *av) |
| 291 | { av->v = 0; av->o = av->n = av->sz = 0; } |
| 292 | */ |
| 293 | |
| 294 | /* |
| 295 | static void argv_reset(struct argv *av) { av->o = av->n = 0; } |
| 296 | */ |
| 297 | |
| 298 | static void argv_ensure(struct argv *av, size_t n) |
| 299 | { |
| 300 | size_t need = av->n + av->o + n, newsz; |
| 301 | |
| 302 | if (need <= av->sz) return; |
| 303 | newsz = av->sz ? 2*av->sz : 8; |
| 304 | while (newsz < need) newsz *= 2; |
| 305 | av->v = xrealloc(av->v, newsz*sizeof(const char *)); av->sz = newsz; |
| 306 | } |
| 307 | |
| 308 | static void argv_ensure_offset(struct argv *av, size_t n) |
| 309 | { |
| 310 | size_t newoff; |
| 311 | |
| 312 | /* Stupid version. We won't, in practice, be prepending lots of stuff, so |
| 313 | * avoid the extra bookkeeping involved in trying to make a double-ended |
| 314 | * extendable array asymptotically efficient. |
| 315 | */ |
| 316 | if (av->o >= n) return; |
| 317 | newoff = 16; |
| 318 | while (newoff < n) newoff *= 2; |
| 319 | argv_ensure(av, newoff - av->o); |
| 320 | memmove(av->v + newoff, av->v + av->o, av->n*sizeof(const char *)); |
| 321 | av->o = newoff; |
| 322 | } |
| 323 | |
| 324 | static void argv_release(struct argv *av) { free(av->v); } |
| 325 | |
| 326 | static void argv_append(struct argv *av, const char *p) |
| 327 | { argv_ensure(av, 1); av->v[av->n++ + av->o] = p; } |
| 328 | |
| 329 | static void argv_appendz(struct argv *av) |
| 330 | { argv_ensure(av, 1); av->v[av->n + av->o] = 0; } |
| 331 | |
| 332 | static void argv_appendn(struct argv *av, const char *const *v, size_t n) |
| 333 | { |
| 334 | argv_ensure(av, n); |
| 335 | memcpy(av->v + av->n + av->o, v, n*sizeof(const char *)); |
| 336 | av->n += n; |
| 337 | } |
| 338 | |
| 339 | /* |
| 340 | static void argv_appendav(struct argv *av, const struct argv *bv) |
| 341 | { argv_appendn(av, bv->v + bv->o, bv->n); } |
| 342 | */ |
| 343 | |
| 344 | /* |
| 345 | static void argv_appendv(struct argv *av, va_list ap) |
| 346 | { |
| 347 | const char *p; |
| 348 | |
| 349 | for (;;) |
| 350 | { p = va_arg(ap, const char *); if (!p) break; argv_append(av, p); } |
| 351 | } |
| 352 | */ |
| 353 | |
| 354 | /* |
| 355 | static EXECL_LIKE(0) void argv_appendl(struct argv *av, ...) |
| 356 | { va_list ap; va_start(ap, av); argv_appendv(av, ap); va_end(ap); } |
| 357 | */ |
| 358 | |
| 359 | static void argv_prepend(struct argv *av, const char *p) |
| 360 | { argv_ensure_offset(av, 1); av->v[--av->o] = p; av->n++; } |
| 361 | |
| 362 | /* |
| 363 | static void argv_prependn(struct argv *av, const char *const *v, size_t n) |
| 364 | { |
| 365 | argv_ensure_offset(av, 1); |
| 366 | av->o -= n; av->n += n; |
| 367 | memcpy(av->v + av->o, v, n*sizeof(const char *)); |
| 368 | } |
| 369 | */ |
| 370 | |
| 371 | /* |
| 372 | static void argv_prependav(struct argv *av, const struct argv *bv) |
| 373 | { argv_prependn(av, bv->v + bv->o, bv->n); } |
| 374 | */ |
| 375 | |
| 376 | static void argv_prependv(struct argv *av, va_list ap) |
| 377 | { |
| 378 | const char *p, **v; |
| 379 | size_t n = 0; |
| 380 | |
| 381 | for (;;) { |
| 382 | p = va_arg(ap, const char *); if (!p) break; |
| 383 | argv_prepend(av, p); n++; |
| 384 | } |
| 385 | v = av->v + av->o; |
| 386 | while (n >= 2) { |
| 387 | p = v[0]; v[0] = v[n - 1]; v[n - 1] = p; |
| 388 | v++; n -= 2; |
| 389 | } |
| 390 | } |
| 391 | |
| 392 | static EXECL_LIKE(0) void argv_prependl(struct argv *av, ...) |
| 393 | { va_list ap; va_start(ap, av); argv_prependv(av, ap); va_end(ap); } |
| 394 | |
| 395 | /*----- Lisp system table (redux) -----------------------------------------*/ |
| 396 | |
| 397 | static const struct systab *find_system(const char *name) |
| 398 | { |
| 399 | const struct systab *sys; |
| 400 | size_t i; |
| 401 | |
| 402 | for (i = 0; i < NSYS; i++) { |
| 403 | sys = &systab[i]; |
| 404 | if (STRCMP(name, ==, sys->name)) return (sys); |
| 405 | } |
| 406 | lose("unknown Lisp system `%s'", name); |
| 407 | } |
| 408 | |
| 409 | static void lisp_quote_string(struct dstr *d, const char *p) |
| 410 | { |
| 411 | size_t n; |
| 412 | |
| 413 | for (;;) { |
| 414 | n = strcspn(p, "\"\\"); |
| 415 | if (n) { dstr_putm(d, p, n); p += n; } |
| 416 | if (!*p) break; |
| 417 | dstr_putc(d, '\\'); dstr_putc(d, *p++); |
| 418 | } |
| 419 | dstr_putz(d); |
| 420 | } |
| 421 | |
| 422 | static const char *expand_rune(struct dstr *d, const char *rune, ...) |
| 423 | { |
| 424 | const struct argv *av; |
| 425 | va_list ap; |
| 426 | size_t i, n; |
| 427 | |
| 428 | va_start(ap, rune); |
| 429 | for (;;) { |
| 430 | n = strcspn(rune, "%"); |
| 431 | if (n) { dstr_putm(d, rune, n); rune += n; } |
| 432 | if (!*rune) break; |
| 433 | switch (*++rune) { |
| 434 | case '%': dstr_putc(d, '%'); break; |
| 435 | case 'e': lisp_quote_string(d, va_arg(ap, const char *)); break; |
| 436 | case 'E': |
| 437 | av = va_arg(ap, const struct argv *); |
| 438 | for (i = 0; i < av->n; i++) { |
| 439 | if (i) dstr_putc(d, ' '); |
| 440 | dstr_putc(d, '"'); |
| 441 | lisp_quote_string(d, av->v[i]); |
| 442 | dstr_putc(d, '"'); |
| 443 | } |
| 444 | break; |
| 445 | default: lose("*** BUG unknown expansion `%%%c'", *rune); |
| 446 | } |
| 447 | rune++; |
| 448 | } |
| 449 | dstr_putz(d); |
| 450 | return (d->p); |
| 451 | } |
| 452 | |
| 453 | /*----- Argument processing -----------------------------------------------*/ |
| 454 | |
| 455 | struct syslist { |
| 456 | const struct systab *sys[NSYS]; |
| 457 | size_t n; |
| 458 | unsigned f; |
| 459 | }; |
| 460 | #define SYSLIST_INIT { { 0 }, 0, 0 } |
| 461 | |
| 462 | struct argstate { |
| 463 | unsigned f; |
| 464 | #define F_BOGUS 1u |
| 465 | #define F_NOEMBED 2u |
| 466 | #define F_NOACT 4u |
| 467 | #define F_NODUMP 8u |
| 468 | #define F_AUX 16u |
| 469 | int verbose; |
| 470 | char *imagedir; |
| 471 | struct syslist allow, pref; |
| 472 | struct argv av; |
| 473 | }; |
| 474 | #define ARGSTATE_INIT { 0, 1, 0, SYSLIST_INIT, SYSLIST_INIT, ARGV_INIT } |
| 475 | |
| 476 | /*----- Running programs --------------------------------------------------*/ |
| 477 | |
| 478 | #define FEF_EXEC 1u |
| 479 | static int file_exists_p(const struct argstate *arg, const char *path, |
| 480 | unsigned f) |
| 481 | { |
| 482 | struct stat st; |
| 483 | |
| 484 | if (stat(path, &st)) { |
| 485 | if (arg && arg->verbose > 2) moan("file `%s' not found", path); |
| 486 | return (0); |
| 487 | } else if (!(S_ISREG(st.st_mode))) { |
| 488 | if (arg && arg->verbose > 2) moan("`%s' is not a regular file", path); |
| 489 | return (0); |
| 490 | } else if ((f&FEF_EXEC) && access(path, X_OK)) { |
| 491 | if (arg && arg->verbose > 2) moan("file `%s' is not executable", path); |
| 492 | return (0); |
| 493 | } else { |
| 494 | if (arg && arg->verbose > 2) moan("found file `%s'", path); |
| 495 | return (1); |
| 496 | } |
| 497 | } |
| 498 | |
| 499 | static int found_in_path_p(const struct argstate *arg, const char *prog) |
| 500 | { |
| 501 | struct dstr p = DSTR_INIT, d = DSTR_INIT; |
| 502 | const char *path; |
| 503 | char *q; |
| 504 | size_t n, avail, proglen; |
| 505 | int i; |
| 506 | |
| 507 | if (strchr(prog, '/')) return (file_exists_p(arg, prog, 0)); |
| 508 | path = getenv("PATH"); |
| 509 | if (path) |
| 510 | dstr_puts(&p, path); |
| 511 | else { |
| 512 | dstr_puts(&p, ".:"); |
| 513 | i = 0; |
| 514 | again: |
| 515 | avail = p.sz - p.len; |
| 516 | n = confstr(_CS_PATH, p.p + p.len, avail); |
| 517 | if (avail > n) { i++; assert(i < 2); dstr_ensure(&p, n); goto again; } |
| 518 | } |
| 519 | |
| 520 | q = p.p; proglen = strlen(prog); |
| 521 | for (;;) { |
| 522 | n = strcspn(q, ":"); |
| 523 | dstr_reset(&d); |
| 524 | if (q[n]) dstr_putm(&d, q, n); |
| 525 | else dstr_putc(&d, '.'); |
| 526 | dstr_putc(&d, '/'); |
| 527 | dstr_putm(&d, prog, proglen); |
| 528 | dstr_putz(&d); |
| 529 | if (file_exists_p(arg, d.p, FEF_EXEC)) { |
| 530 | if (arg->verbose == 2) moan("found program `%s'", d.p); |
| 531 | return (1); |
| 532 | } |
| 533 | q += n; if (!*q) break; else q++; |
| 534 | } |
| 535 | return (0); |
| 536 | } |
| 537 | |
| 538 | static void try_exec(const struct argstate *arg, struct argv *av) |
| 539 | { |
| 540 | struct dstr d = DSTR_INIT; |
| 541 | size_t i; |
| 542 | |
| 543 | assert(av->n); argv_appendz(av); |
| 544 | if (arg->verbose > 1) { |
| 545 | for (i = 0; i < av->n; i++) { |
| 546 | if (i) { dstr_putc(&d, ','); dstr_putc(&d, ' '); } |
| 547 | dstr_putc(&d, '"'); |
| 548 | lisp_quote_string(&d, av->v[av->o + i]); |
| 549 | dstr_putc(&d, '"'); |
| 550 | } |
| 551 | dstr_putz(&d); |
| 552 | moan("trying %s...", d.p); |
| 553 | } |
| 554 | if (arg->f&F_NOACT) |
| 555 | { if (found_in_path_p(arg, av->v[av->o])) exit(0); } |
| 556 | else { |
| 557 | execvp(av->v[av->o], (/*unconst*/ char **)av->v + av->o); |
| 558 | if (errno != ENOENT) |
| 559 | lose("failed to exec `%s': %s", av->v[av->o], strerror(errno)); |
| 560 | } |
| 561 | if (arg->verbose > 1) moan("`%s' not found", av->v[av->o]); |
| 562 | dstr_release(&d); |
| 563 | } |
| 564 | |
| 565 | static const char *getenv_or_default(const char *var, const char *dflt) |
| 566 | { const char *p = getenv(var); return (p ? p : dflt); } |
| 567 | |
| 568 | /*----- Invoking Lisp systems ---------------------------------------------*/ |
| 569 | |
| 570 | /* Steel Bank Common Lisp. */ |
| 571 | |
| 572 | static void run_sbcl(struct argstate *arg, const char *script) |
| 573 | { |
| 574 | struct dstr d = DSTR_INIT; |
| 575 | |
| 576 | argv_prependl(&arg->av, "--script", script, END); |
| 577 | |
| 578 | dstr_puts(&d, arg->imagedir); |
| 579 | dstr_putc(&d, '/'); |
| 580 | dstr_puts(&d, "sbcl+asdf.core"); |
| 581 | if (!(arg->f&F_NODUMP) && file_exists_p(arg, d.p, 0)) |
| 582 | argv_prependl(&arg->av, |
| 583 | "--core", d.p, |
| 584 | "--eval", IMAGE_RESTORE_RUNE, |
| 585 | END); |
| 586 | else |
| 587 | argv_prependl(&arg->av, "--eval", COMMON_PRELUDE_RUNE, END); |
| 588 | |
| 589 | argv_prependl(&arg->av, getenv_or_default("SBCL", "sbcl"), |
| 590 | "--noinform", |
| 591 | END); |
| 592 | try_exec(arg, &arg->av); |
| 593 | dstr_release(&d); |
| 594 | } |
| 595 | |
| 596 | /* Clozure Common Lisp. */ |
| 597 | |
| 598 | #define CCL_QUIT_RUNE \ |
| 599 | "(ccl:quit)" |
| 600 | |
| 601 | static void run_ccl(struct argstate *arg, const char *script) |
| 602 | { |
| 603 | struct dstr d = DSTR_INIT; |
| 604 | |
| 605 | argv_prependl(&arg->av, "-b", "-n", "-Q", |
| 606 | "-l", script, |
| 607 | "-e", CCL_QUIT_RUNE, |
| 608 | "--", |
| 609 | END); |
| 610 | |
| 611 | dstr_puts(&d, arg->imagedir); |
| 612 | dstr_putc(&d, '/'); |
| 613 | dstr_puts(&d, "ccl+asdf.image"); |
| 614 | if (!(arg->f&F_NODUMP) && file_exists_p(arg, d.p, 0)) |
| 615 | argv_prependl(&arg->av, "-I", d.p, "-e", IMAGE_RESTORE_RUNE, END); |
| 616 | else |
| 617 | argv_prependl(&arg->av, "-e", COMMON_PRELUDE_RUNE, END); |
| 618 | |
| 619 | argv_prepend(&arg->av, getenv_or_default("CCL", "ccl")); |
| 620 | try_exec(arg, &arg->av); |
| 621 | dstr_release(&d); |
| 622 | } |
| 623 | |
| 624 | /* GNU CLisp. |
| 625 | * |
| 626 | * CLisp causes much sadness. Superficially, it's the most sensible of all |
| 627 | * of the systems supported here: you just run `clisp SCRIPT -- ARGS ...' and |
| 628 | * it works. |
| 629 | * |
| 630 | * The problems come when you want to do some preparatory work (e.g., load |
| 631 | * `asdf') and then run the script. There's a `-x' option to evaluate some |
| 632 | * Lisp code, but it has three major deficiencies. |
| 633 | * |
| 634 | * * It insists on printing the values of the forms it evaluates. It |
| 635 | * prints a blank line even if the form goes out of its way to produce no |
| 636 | * values at all. So the whole thing has to be a single top-level form |
| 637 | * which quits the Lisp rather than returning. |
| 638 | * |
| 639 | * * For some idiotic reason, you can have /either/ `-x' forms /or/ a |
| 640 | * script, but not both. So we have to include the `load' here |
| 641 | * explicitly. I suppose that was inevitable because we have to inhibit |
| 642 | * printing of the result forms, but it's still a separate source of |
| 643 | * annoyance. |
| 644 | * |
| 645 | * * The icing on the cake: the `-x' forms are collectively concatenated -- |
| 646 | * without spaces! -- and used to build a string stream, which is then |
| 647 | * assigned over the top of `*standard-input*', making the original stdin |
| 648 | * somewhat fiddly to track down. |
| 649 | * |
| 650 | * There's an `-i' option which will load a file without any of this |
| 651 | * stupidity, but nothing analogous for immediate expressions. |
| 652 | */ |
| 653 | |
| 654 | #define CLISP_COMMON_STARTUP_RUNES \ |
| 655 | "(setf *standard-input* (ext:make-stream :input)) " \ |
| 656 | "(load \"%e\" :verbose nil :print nil) " \ |
| 657 | "(ext:quit)" |
| 658 | |
| 659 | #define CLISP_STARTUP_RUNE \ |
| 660 | "(progn " \ |
| 661 | COMMON_PRELUDE_RUNE " " \ |
| 662 | CLISP_COMMON_STARTUP_RUNES ")" |
| 663 | |
| 664 | #define CLISP_STARTUP_IMAGE_RUNE \ |
| 665 | "(progn " \ |
| 666 | IMAGE_RESTORE_RUNE " " \ |
| 667 | CLISP_COMMON_STARTUP_RUNES ")" |
| 668 | |
| 669 | static void run_clisp(struct argstate *arg, const char *script) |
| 670 | { |
| 671 | struct dstr d = DSTR_INIT, dd = DSTR_INIT; |
| 672 | |
| 673 | dstr_puts(&d, arg->imagedir); |
| 674 | dstr_putc(&d, '/'); |
| 675 | dstr_puts(&d, "clisp+asdf.mem"); |
| 676 | if (!(arg->f&F_NODUMP) && file_exists_p(arg, d.p, 0)) |
| 677 | argv_prependl(&arg->av, "-M", d.p, "-q", |
| 678 | "-x", expand_rune(&dd, CLISP_STARTUP_IMAGE_RUNE, script), |
| 679 | "--", |
| 680 | END); |
| 681 | else |
| 682 | argv_prependl(&arg->av, "-norc", "-q", |
| 683 | "-x", expand_rune(&dd, CLISP_STARTUP_RUNE, script), |
| 684 | "--", |
| 685 | END); |
| 686 | |
| 687 | argv_prepend(&arg->av, getenv_or_default("CLISP", "clisp")); |
| 688 | try_exec(arg, &arg->av); |
| 689 | dstr_release(&d); |
| 690 | dstr_release(&dd); |
| 691 | |
| 692 | #undef f |
| 693 | } |
| 694 | |
| 695 | /* Embeddable Common Lisp. * |
| 696 | * |
| 697 | * ECL is changing its command-line option syntax in version 16. I have no |
| 698 | * idea why they think the result can ever be worth the pain of a transition. |
| 699 | */ |
| 700 | |
| 701 | #if ECL_OPTIONS_GNU |
| 702 | # define ECLOPT "--" |
| 703 | #else |
| 704 | # define ECLOPT "-" |
| 705 | #endif |
| 706 | |
| 707 | #define ECL_STARTUP_RUNE \ |
| 708 | "(progn " \ |
| 709 | COMMON_PRELUDE_RUNE " " \ |
| 710 | CLEAR_CL_USER_RUNE ")" |
| 711 | |
| 712 | static void run_ecl(struct argstate *arg, const char *script) |
| 713 | { |
| 714 | struct dstr d = DSTR_INIT; |
| 715 | |
| 716 | dstr_puts(&d, arg->imagedir); |
| 717 | dstr_putc(&d, '/'); |
| 718 | dstr_puts(&d, "ecl+asdf"); |
| 719 | if (!(arg->f&F_NODUMP) && file_exists_p(arg, d.p, FEF_EXEC)) { |
| 720 | argv_prependl(&arg->av, "-s", script, "--", END); |
| 721 | argv_prependl(&arg->av, d.p, END); |
| 722 | } else { |
| 723 | argv_prependl(&arg->av, ECLOPT "shell", script, "--", END); |
| 724 | argv_prependl(&arg->av, getenv_or_default("ECL", "ecl"), ECLOPT "norc", |
| 725 | ECLOPT "eval", ECL_STARTUP_RUNE, |
| 726 | END); |
| 727 | } |
| 728 | try_exec(arg, &arg->av); |
| 729 | } |
| 730 | |
| 731 | /* Carnegie--Mellon University Common Lisp. */ |
| 732 | |
| 733 | #define CMUCL_STARTUP_RUNE \ |
| 734 | "(progn " \ |
| 735 | "(setf ext:*require-verbose* nil) " \ |
| 736 | COMMON_PRELUDE_RUNE ")" |
| 737 | #define CMUCL_QUIT_RUNE \ |
| 738 | "(ext:quit)" |
| 739 | |
| 740 | static void run_cmucl(struct argstate *arg, const char *script) |
| 741 | { |
| 742 | struct dstr d = DSTR_INIT; |
| 743 | |
| 744 | argv_prependl(&arg->av, |
| 745 | "-load", script, |
| 746 | "-eval", CMUCL_QUIT_RUNE, |
| 747 | "--", |
| 748 | END); |
| 749 | |
| 750 | dstr_puts(&d, arg->imagedir); |
| 751 | dstr_putc(&d, '/'); |
| 752 | dstr_puts(&d, "cmucl+asdf.core"); |
| 753 | if (!(arg->f&F_NODUMP) && file_exists_p(arg, d.p, 0)) |
| 754 | argv_prependl(&arg->av, "-core", d.p, "-eval", IMAGE_RESTORE_RUNE, END); |
| 755 | else |
| 756 | argv_prependl(&arg->av, "-batch", "-noinit", "-nositeinit", "-quiet", |
| 757 | "-eval", CMUCL_STARTUP_RUNE, |
| 758 | END); |
| 759 | |
| 760 | argv_prepend(&arg->av, getenv_or_default("CMUCL", "cmucl")); |
| 761 | try_exec(arg, &arg->av); |
| 762 | dstr_release(&d); |
| 763 | } |
| 764 | |
| 765 | /* Armed Bear Common Lisp. * |
| 766 | * |
| 767 | * CLisp made a worthy effort, but ABCL still manages to take the price. |
| 768 | * |
| 769 | * * ABCL manages to avoid touching the `stderr' stream at all, ever. Its |
| 770 | * startup machinery finds `stdout' (as `java.lang.System.out'), wraps it |
| 771 | * up in a Lisp stream, and uses the result as `*standard-output*' and |
| 772 | * `*error-output*' (and a goodly number of other things too). So we |
| 773 | * must manufacture a working `stderr' the hard way. |
| 774 | * |
| 775 | * * There doesn't appear to be any easy way to prevent toplevel errors |
| 776 | * from invoking the interactive debugger. For extra fun, the debugger |
| 777 | * reads from `stdin' by default, so an input file which somehow manages |
| 778 | * to break the script can then take over its brain by providing Lisp |
| 779 | * forms for the debugger to evaluate. |
| 780 | */ |
| 781 | |
| 782 | #define ABCL_STARTUP_RUNE \ |
| 783 | "(let ((#9=#:script \"%e\")) " \ |
| 784 | COMMON_PRELUDE_RUNE " " \ |
| 785 | CLEAR_CL_USER_RUNE " " \ |
| 786 | \ |
| 787 | /* Replace the broken `*error-output*' stream with a working \ |
| 788 | * copy of `stderr'. \ |
| 789 | */ \ |
| 790 | "(setf *error-output* " \ |
| 791 | "(java:jnew \"org.armedbear.lisp.Stream\" " \ |
| 792 | "'sys::system-stream " \ |
| 793 | "(java:jfield \"java.lang.System\" \"err\") " \ |
| 794 | "'character " \ |
| 795 | "java:+true+)) " \ |
| 796 | \ |
| 797 | /* Trap errors signalled by the script and arrange for them \ |
| 798 | * to actually kill the process rather than ending up in the \ |
| 799 | * interactive debugger. \ |
| 800 | */ \ |
| 801 | "(handler-case (load #9# :verbose nil :print nil) " \ |
| 802 | "(error (error) " \ |
| 803 | "(format *error-output* \"~A (unhandled error): ~A~%%\" " \ |
| 804 | "#9# error) " \ |
| 805 | "(ext:quit :status 255))))" |
| 806 | |
| 807 | static void run_abcl(struct argstate *arg, const char *script) |
| 808 | { |
| 809 | struct dstr d = DSTR_INIT; |
| 810 | |
| 811 | argv_prependl(&arg->av, getenv_or_default("ABCL", "abcl"), |
| 812 | "--batch", "--noinform", "--noinit", "--nosystem", |
| 813 | "--eval", expand_rune(&d, ABCL_STARTUP_RUNE, script), |
| 814 | "--", |
| 815 | END); |
| 816 | try_exec(arg, &arg->av); |
| 817 | dstr_release(&d); |
| 818 | } |
| 819 | |
| 820 | /*----- Main code ---------------------------------------------------------*/ |
| 821 | |
| 822 | static void version(FILE *fp) |
| 823 | { fprintf(fp, "%s, version %s\n", progname, PACKAGE_VERSION); } |
| 824 | |
| 825 | static void usage(FILE *fp) |
| 826 | { |
| 827 | fprintf(fp, "usage: %s [-CDEnqv] [-I IMAGEDIR] " |
| 828 | "[-L SYS,SYS,...] [-P SYS,SYS,...]\n" |
| 829 | "\t[--] SCRIPT [ARGUMENTS ...] |\n" |
| 830 | "\t[-e EXPR] [-p EXPR] [-l FILE] [--] [ARGUMENTS ...]\n", |
| 831 | progname); |
| 832 | } |
| 833 | |
| 834 | static void help(FILE *fp) |
| 835 | { |
| 836 | version(fp); fputc('\n', fp); usage(fp); |
| 837 | fputs("\n\ |
| 838 | Options:\n\ |
| 839 | --help Show this help text and exit successfully.\n\ |
| 840 | --version Show the version number and exit successfully.\n\ |
| 841 | -C Clear the list of preferred Lisp systems.\n\ |
| 842 | -D Run system Lisp images, rather than custom images.\n\ |
| 843 | -E Don't read embedded options from the script.\n\ |
| 844 | -I IMAGEDIR Look for custom images in IMAGEDIR rather than\n\ |
| 845 | `" IMAGEDIR "'.\n\ |
| 846 | -L SYS,SYS,... Only use the listed Lisp systems.the script.\n\ |
| 847 | -P SYS,SYS,... Prefer the listed Lisp systems.\n\ |
| 848 | -e EXPR Evaluate EXPR (can be repeated).\n\ |
| 849 | -l FILE Load FILE (can be repeated).\n\ |
| 850 | -n Don't actually run the script (useful with `-v')\n\ |
| 851 | -p EXPR Print (`prin1') EXPR (can be repeated).\n\ |
| 852 | -q Don't print warning messages.\n\ |
| 853 | -v Print informational messages (repeat for even more).\n", |
| 854 | fp); |
| 855 | } |
| 856 | |
| 857 | /* Parse a comma-separated list of system names SPEC, and add the named |
| 858 | * systems to LIST. |
| 859 | */ |
| 860 | static void parse_syslist(const char *spec, const struct argstate *arg, |
| 861 | struct syslist *list, const char *what) |
| 862 | { |
| 863 | char *copy = xstrdup(spec), *p = copy, *q; |
| 864 | const struct systab *sys; |
| 865 | size_t n; |
| 866 | |
| 867 | for (;;) { |
| 868 | n = strcspn(p, ","); |
| 869 | if (p[n]) q = p + n + 1; |
| 870 | else q = 0; |
| 871 | p[n] = 0; sys = find_system(p); |
| 872 | if (list->f&sys->f) { |
| 873 | if (arg->verbose > 0) |
| 874 | moan("ignoring duplicate system `%s' in %s list", p, what); |
| 875 | } else { |
| 876 | list->sys[list->n++] = sys; |
| 877 | list->f |= sys->f; |
| 878 | } |
| 879 | if (!q) break; |
| 880 | p = q; |
| 881 | } |
| 882 | free(copy); |
| 883 | } |
| 884 | |
| 885 | static void push_eval_op(struct argstate *arg, char op, const char *val) |
| 886 | { |
| 887 | char *p; |
| 888 | size_t n; |
| 889 | |
| 890 | if (arg->f&F_AUX) { |
| 891 | moan("must use `-e', `-p', or `-l' on command line"); |
| 892 | arg->f |= F_BOGUS; |
| 893 | return; |
| 894 | } |
| 895 | |
| 896 | n = strlen(val) + 1; |
| 897 | p = xmalloc(n + 1); |
| 898 | p[0] = op; memcpy(p + 1, val, n); |
| 899 | argv_append(&arg->av, p); |
| 900 | } |
| 901 | |
| 902 | /* Parse a vector ARGS of command-line arguments. Update ARG with the |
| 903 | * results. NARG is the number of arguments, and *I_INOUT is the current |
| 904 | * index into the vector, to be updated on exit to identify the first |
| 905 | * non-option argument (or the end of the vector). |
| 906 | */ |
| 907 | static void parse_arguments(struct argstate *arg, const char *const *args, |
| 908 | size_t nargs, size_t *i_inout) |
| 909 | { |
| 910 | const char *o, *a; |
| 911 | char opt; |
| 912 | |
| 913 | for (;;) { |
| 914 | if (*i_inout >= nargs) break; |
| 915 | o = args[*i_inout]; |
| 916 | if (STRCMP(o, ==, "--help")) { help(stdout); exit(0); } |
| 917 | else if (STRCMP(o, ==, "--version")) { version(stdout); exit(0); } |
| 918 | if (!*o || *o != '-' || !o[1]) break; |
| 919 | (*i_inout)++; |
| 920 | if (STRCMP(o, ==, "--")) break; |
| 921 | o++; |
| 922 | while (o && *o) { |
| 923 | opt = *o++; |
| 924 | switch (opt) { |
| 925 | |
| 926 | #define GETARG do { \ |
| 927 | if (*o) \ |
| 928 | { a = o; o = 0; } \ |
| 929 | else { \ |
| 930 | if (*i_inout >= nargs) goto noarg; \ |
| 931 | a = args[(*i_inout)++]; \ |
| 932 | } \ |
| 933 | } while (0) |
| 934 | |
| 935 | case 'C': arg->pref.n = 0; arg->pref.f = 0; break; |
| 936 | case 'D': arg->f |= F_NODUMP; break; |
| 937 | case 'E': arg->f |= F_NOEMBED; break; |
| 938 | case 'e': GETARG; push_eval_op(arg, '!', a); break; |
| 939 | case 'p': GETARG; push_eval_op(arg, '?', a); break; |
| 940 | case 'l': GETARG; push_eval_op(arg, '<', a); break; |
| 941 | case 'n': arg->f |= F_NOACT; break; |
| 942 | case 'q': if (arg->verbose) arg->verbose--; break; |
| 943 | case 'v': arg->verbose++; break; |
| 944 | |
| 945 | case 'I': |
| 946 | free(arg->imagedir); |
| 947 | GETARG; arg->imagedir = xstrdup(a); |
| 948 | break; |
| 949 | |
| 950 | case 'L': |
| 951 | GETARG; |
| 952 | parse_syslist(a, arg, &arg->allow, "allowed"); |
| 953 | break; |
| 954 | |
| 955 | case 'P': |
| 956 | GETARG; |
| 957 | parse_syslist(a, arg, &arg->pref, "preferred"); |
| 958 | break; |
| 959 | |
| 960 | default: |
| 961 | moan("unknown option `%c'", opt); |
| 962 | arg->f |= F_BOGUS; |
| 963 | break; |
| 964 | |
| 965 | #undef GETARG |
| 966 | |
| 967 | } |
| 968 | } |
| 969 | } |
| 970 | goto end; |
| 971 | |
| 972 | noarg: |
| 973 | moan("missing argument for `-%c'", opt); |
| 974 | arg->f |= F_BOGUS; |
| 975 | end: |
| 976 | return; |
| 977 | } |
| 978 | |
| 979 | /* Parse a string P into words (destructively), and process them as |
| 980 | * command-line options, updating ARG. Non-option arguments are not |
| 981 | * permitted. If `SOSF_EMACS' is set in FLAGS, then ignore `-*- ... -*-' |
| 982 | * editor turds. If `SOSF_ENDOK' is set, then accept `--' and ignore |
| 983 | * whatever comes after; otherwise, reject all positional arguments. |
| 984 | */ |
| 985 | #define SOSF_EMACS 1u |
| 986 | #define SOSF_ENDOK 2u |
| 987 | static void scan_options_from_string(char *p, struct argstate *arg, |
| 988 | unsigned flags, |
| 989 | const char *what, const char *file) |
| 990 | { |
| 991 | struct argv av = ARGV_INIT; |
| 992 | char *q; |
| 993 | size_t i; |
| 994 | int st = 0; |
| 995 | unsigned f = 0; |
| 996 | #define f_escape 1u |
| 997 | |
| 998 | for (;;) { |
| 999 | while (ISSPACE(*p)) p++; |
| 1000 | if (!*p) break; |
| 1001 | if ((flags&SOSF_EMACS) && p[0] == '-' && p[1] == '*' && p[2] == '-') { |
| 1002 | p = strstr(p + 3, "-*-"); |
| 1003 | if (!p) lose("unfinished local-variables list in %s `%s'", what, file); |
| 1004 | p += 3; continue; |
| 1005 | } |
| 1006 | if ((flags&SOSF_ENDOK) && |
| 1007 | p[0] == '-' && p[1] == '-' && (!p[2] || ISSPACE(p[2]))) |
| 1008 | break; |
| 1009 | argv_append(&av, p); q = p; |
| 1010 | for (;;) { |
| 1011 | if (!*p) break; |
| 1012 | else if (f&f_escape) { *q++ = *p; f &= ~f_escape; } |
| 1013 | else if (st && *p == st) st = 0; |
| 1014 | else if (st != '\'' && *p == '\\') f |= f_escape; |
| 1015 | else if (!st && (*p == '"' || *p == '\'')) st = *p; |
| 1016 | else if (!st && ISSPACE(*p)) break; |
| 1017 | else *q++ = *p; |
| 1018 | p++; |
| 1019 | } |
| 1020 | if (*p) p++; |
| 1021 | *q = 0; |
| 1022 | if (f&f_escape) lose("unfinished escape in %s `%s'", what, file); |
| 1023 | if (st) lose("unfinished `%c' string in %s `%s'", st, what, file); |
| 1024 | } |
| 1025 | |
| 1026 | i = 0; parse_arguments(arg, av.v, av.n, &i); |
| 1027 | if (i < av.n) |
| 1028 | lose("positional argument `%s' in %s `%s'", av.v[i], what, file); |
| 1029 | argv_release(&av); |
| 1030 | |
| 1031 | #undef f_escape |
| 1032 | } |
| 1033 | |
| 1034 | /* Read SCRIPT, and check for a `@RUNLISP:' marker in the second line. If |
| 1035 | * there is one, parse options from it, and update ARG. |
| 1036 | */ |
| 1037 | static void check_for_embedded_args(const char *script, struct argstate *arg) |
| 1038 | { |
| 1039 | struct dstr d = DSTR_INIT; |
| 1040 | char *p; |
| 1041 | FILE *fp = 0; |
| 1042 | |
| 1043 | fp = fopen(script, "r"); |
| 1044 | if (!fp) lose("can't read script `%s': %s", script, strerror(errno)); |
| 1045 | |
| 1046 | if (dstr_readline(&d, fp)) goto end; |
| 1047 | dstr_reset(&d); if (dstr_readline(&d, fp)) goto end; |
| 1048 | |
| 1049 | p = strstr(d.p, "@RUNLISP:"); |
| 1050 | if (p) |
| 1051 | scan_options_from_string(p + 9, arg, SOSF_EMACS | SOSF_ENDOK, |
| 1052 | "embedded options in script", script); |
| 1053 | |
| 1054 | end: |
| 1055 | if (fp) { |
| 1056 | if (ferror(fp)) |
| 1057 | lose("error reading script `%s': %s", script, strerror(errno)); |
| 1058 | fclose(fp); |
| 1059 | } |
| 1060 | dstr_release(&d); |
| 1061 | } |
| 1062 | |
| 1063 | /* Read the file PATH (if it exists) and update ARG with the arguments parsed |
| 1064 | * from it. Ignore blank lines and (Unix- or Lisp-style) comments. |
| 1065 | */ |
| 1066 | static void read_config_file(const char *path, struct argstate *arg) |
| 1067 | { |
| 1068 | FILE *fp = 0; |
| 1069 | struct dstr d = DSTR_INIT; |
| 1070 | char *p; |
| 1071 | |
| 1072 | fp = fopen(path, "r"); |
| 1073 | if (!fp) { |
| 1074 | if (errno == ENOENT) { |
| 1075 | if (arg->verbose > 2) |
| 1076 | moan("ignoring nonexistent configuration file `%s'", path); |
| 1077 | goto end; |
| 1078 | } |
| 1079 | lose("failed to open configuration file `%s': %s", |
| 1080 | path, strerror(errno)); |
| 1081 | } |
| 1082 | if (arg->verbose > 1) |
| 1083 | moan("reading configuration file `%s'", path); |
| 1084 | for (;;) { |
| 1085 | dstr_reset(&d); |
| 1086 | if (dstr_readline(&d, fp)) break; |
| 1087 | p = d.p; |
| 1088 | while (ISSPACE(*p)) p++; |
| 1089 | if (!*p || *p == ';' || *p == '#') continue; |
| 1090 | scan_options_from_string(p, arg, 0, "configuration file `%s'", path); |
| 1091 | } |
| 1092 | if (arg->f&F_BOGUS) |
| 1093 | lose("invalid options in configuration file `%s'", path); |
| 1094 | |
| 1095 | end: |
| 1096 | if (fp) { |
| 1097 | if (ferror(fp)) |
| 1098 | lose("error reading configuration file `%s': %s", |
| 1099 | path, strerror(errno)); |
| 1100 | fclose(fp); |
| 1101 | } |
| 1102 | dstr_release(&d); |
| 1103 | } |
| 1104 | |
| 1105 | int main(int argc, char *argv[]) |
| 1106 | { |
| 1107 | struct dstr d = DSTR_INIT; |
| 1108 | const char *script, *p; |
| 1109 | const char *home; |
| 1110 | struct passwd *pw; |
| 1111 | char *t; |
| 1112 | size_t i, n; |
| 1113 | struct argstate arg = ARGSTATE_INIT; |
| 1114 | |
| 1115 | /* Scan the command line. This gets low priority, since it's probably |
| 1116 | * from the script shebang. |
| 1117 | */ |
| 1118 | set_progname(argv[0]); i = 1; |
| 1119 | parse_arguments(&arg, (const char *const *)argv, argc, &i); |
| 1120 | arg.f |= F_AUX; |
| 1121 | if ((i >= argc && !arg.av.n) || (arg.f&F_BOGUS)) |
| 1122 | { usage(stderr); exit(255); } |
| 1123 | |
| 1124 | /* Prepare the argument vector. Keep track of the number of arguments |
| 1125 | * here: we'll need to refer to this later. |
| 1126 | */ |
| 1127 | if (!arg.av.n) { |
| 1128 | script = argv[i++]; |
| 1129 | if (!(arg.f&F_NOEMBED)) check_for_embedded_args(script, &arg); |
| 1130 | if (arg.f&F_BOGUS) |
| 1131 | lose("invalid options in `%s' embedded option list", script); |
| 1132 | } else { |
| 1133 | script = getenv("RUNLISP_EVAL"); |
| 1134 | if (!script) script = DATADIR "/eval.lisp"; |
| 1135 | argv_append(&arg.av, "--"); |
| 1136 | } |
| 1137 | argv_appendn(&arg.av, (const char *const *)argv + i, argc - i); |
| 1138 | n = arg.av.n; |
| 1139 | |
| 1140 | /* Find the user's home directory. (Believe them if they set something |
| 1141 | * strange.) |
| 1142 | */ |
| 1143 | home = getenv("HOME"); |
| 1144 | if (!home) { |
| 1145 | pw = getpwuid(getuid()); |
| 1146 | if (!pw) lose("can't find user in password database"); |
| 1147 | home = pw->pw_dir; |
| 1148 | } |
| 1149 | |
| 1150 | /* Check user configuration file `~/.runlisprc'. */ |
| 1151 | dstr_reset(&d); |
| 1152 | dstr_puts(&d, home); dstr_putc(&d, '/'); dstr_puts(&d, ".runlisprc"); |
| 1153 | read_config_file(d.p, &arg); |
| 1154 | |
| 1155 | /* Check user configuration file `~/.config/runlisprc'. */ |
| 1156 | dstr_reset(&d); |
| 1157 | p = getenv("XDG_CONFIG_HOME"); |
| 1158 | if (p) |
| 1159 | dstr_puts(&d, p); |
| 1160 | else |
| 1161 | { dstr_puts(&d, home); dstr_putc(&d, '/'); dstr_puts(&d, ".config"); } |
| 1162 | dstr_putc(&d, '/'); dstr_puts(&d, "runlisprc"); |
| 1163 | read_config_file(d.p, &arg); |
| 1164 | |
| 1165 | /* Finally, check the environment variables. */ |
| 1166 | p = getenv("RUNLISP_OPTIONS"); |
| 1167 | if (p) { |
| 1168 | t = xstrdup(p); |
| 1169 | scan_options_from_string(t, &arg, 0, |
| 1170 | "environment variable", "RUNLISP_OPTIONS"); |
| 1171 | free(t); |
| 1172 | } |
| 1173 | if (arg.f&F_BOGUS) |
| 1174 | lose("invalid options in environment variable `RUNLISP_OPTIONS'"); |
| 1175 | if (!arg.imagedir) { |
| 1176 | arg.imagedir = getenv("RUNLISP_IMAGEDIR"); |
| 1177 | if (!arg.imagedir) arg.imagedir = IMAGEDIR; |
| 1178 | } |
| 1179 | |
| 1180 | /* If no systems are listed as acceptable, try them all. */ |
| 1181 | if (!arg.allow.n) { |
| 1182 | if (arg.verbose > 1) |
| 1183 | moan("no explicitly allowed implementations: allowing all"); |
| 1184 | for (i = 0; i < NSYS; i++) arg.allow.sys[i] = &systab[i]; |
| 1185 | arg.allow.n = NSYS; arg.allow.f = (1u << NSYS) - 1; |
| 1186 | } |
| 1187 | |
| 1188 | /* Print what we're going to do. */ |
| 1189 | if (arg.verbose > 2) { |
| 1190 | dstr_reset(&d); p = ""; |
| 1191 | for (i = 0; i < arg.allow.n; i++) |
| 1192 | { dstr_puts(&d, p); p = ", "; dstr_puts(&d, arg.allow.sys[i]->name); } |
| 1193 | moan("permitted Lisps: %s", d.p); |
| 1194 | |
| 1195 | dstr_reset(&d); p = ""; |
| 1196 | for (i = 0; i < arg.pref.n; i++) |
| 1197 | { dstr_puts(&d, p); p = ", "; dstr_puts(&d, arg.pref.sys[i]->name); } |
| 1198 | moan("preferred Lisps: %s", d.p); |
| 1199 | |
| 1200 | dstr_reset(&d); p = ""; |
| 1201 | for (i = 0; i < arg.pref.n; i++) |
| 1202 | if (arg.pref.sys[i]->f&arg.allow.f) |
| 1203 | { dstr_puts(&d, p); p = ", "; dstr_puts(&d, arg.pref.sys[i]->name); } |
| 1204 | for (i = 0; i < arg.allow.n; i++) |
| 1205 | if (!(arg.allow.sys[i]->f&arg.pref.f)) |
| 1206 | { dstr_puts(&d, p); p = ", "; dstr_puts(&d, arg.allow.sys[i]->name); } |
| 1207 | moan("overall preference order: %s", d.p); |
| 1208 | } |
| 1209 | |
| 1210 | /* Inform `uiop' of the script name. |
| 1211 | * |
| 1212 | * As an aside, this is a terrible interface. It's too easy to forget to |
| 1213 | * set it. (To illustrate this, `cl-launch -x' indeed forgets to set it.) |
| 1214 | * If you're lucky, the script just thinks that its argument is `nil', in |
| 1215 | * which case maybe it can use `*load-pathname*' as a fallback. If you're |
| 1216 | * unlucky, your script was invoked (possibly indirectly) by another |
| 1217 | * script, and now you've accidentally inherited the calling script's name. |
| 1218 | * |
| 1219 | * It would have been far better simply to repeat the script name as the |
| 1220 | * first user argument, if nothing else had come readily to mind. |
| 1221 | */ |
| 1222 | if (setenv("__CL_ARGV0", script, 1)) |
| 1223 | lose("failed to set script-name environment variable"); |
| 1224 | |
| 1225 | /* Work through the list of preferred Lisp systems, trying the ones which |
| 1226 | * are allowed. |
| 1227 | */ |
| 1228 | for (i = 0; i < arg.pref.n; i++) |
| 1229 | if (arg.pref.sys[i]->f&arg.allow.f) { |
| 1230 | arg.av.o += arg.av.n - n; arg.av.n = n; |
| 1231 | arg.pref.sys[i]->run(&arg, script); |
| 1232 | } |
| 1233 | |
| 1234 | /* That didn't work. Try the remaining allowed systems, in the given |
| 1235 | * order. |
| 1236 | */ |
| 1237 | for (i = 0; i < arg.allow.n; i++) |
| 1238 | if (!(arg.allow.sys[i]->f&arg.pref.f)) { |
| 1239 | arg.av.o += arg.av.n - n; arg.av.n = n; |
| 1240 | arg.allow.sys[i]->run(&arg, script); |
| 1241 | } |
| 1242 | |
| 1243 | /* No joy. Give up. */ |
| 1244 | argv_release(&arg.av); |
| 1245 | lose("no supported Lisp systems found"); |
| 1246 | } |
| 1247 | |
| 1248 | /*----- That's all, folks -------------------------------------------------*/ |