The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame^] | 1 | /* $NetBSD: histedit.c,v 1.34 2003/10/27 06:19:29 lukem Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 1993 |
| 5 | * The Regents of the University of California. All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to Berkeley by |
| 8 | * Kenneth Almquist. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * 3. Neither the name of the University nor the names of its contributors |
| 19 | * may be used to endorse or promote products derived from this software |
| 20 | * without specific prior written permission. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 32 | * SUCH DAMAGE. |
| 33 | */ |
| 34 | |
| 35 | #include <sys/cdefs.h> |
| 36 | #ifndef lint |
| 37 | #if 0 |
| 38 | static char sccsid[] = "@(#)histedit.c 8.2 (Berkeley) 5/4/95"; |
| 39 | #else |
| 40 | __RCSID("$NetBSD: histedit.c,v 1.34 2003/10/27 06:19:29 lukem Exp $"); |
| 41 | #endif |
| 42 | #endif /* not lint */ |
| 43 | |
| 44 | #include <sys/param.h> |
| 45 | #include <paths.h> |
| 46 | #include <stdio.h> |
| 47 | #include <stdlib.h> |
| 48 | #include <unistd.h> |
| 49 | /* |
| 50 | * Editline and history functions (and glue). |
| 51 | */ |
| 52 | #include "shell.h" |
| 53 | #include "parser.h" |
| 54 | #include "var.h" |
| 55 | #include "options.h" |
| 56 | #include "main.h" |
| 57 | #include "output.h" |
| 58 | #include "mystring.h" |
| 59 | #include "myhistedit.h" |
| 60 | #include "error.h" |
| 61 | #ifndef SMALL |
| 62 | #include "eval.h" |
| 63 | #include "memalloc.h" |
| 64 | |
| 65 | #define MAXHISTLOOPS 4 /* max recursions through fc */ |
| 66 | #define DEFEDITOR "ed" /* default editor *should* be $EDITOR */ |
| 67 | |
| 68 | History *hist; /* history cookie */ |
| 69 | EditLine *el; /* editline cookie */ |
| 70 | int displayhist; |
| 71 | static FILE *el_in, *el_out; |
| 72 | |
| 73 | STATIC const char *fc_replace(const char *, char *, char *); |
| 74 | |
| 75 | #ifdef DEBUG |
| 76 | extern FILE *tracefile; |
| 77 | #endif |
| 78 | |
| 79 | /* |
| 80 | * Set history and editing status. Called whenever the status may |
| 81 | * have changed (figures out what to do). |
| 82 | */ |
| 83 | void |
| 84 | histedit(void) |
| 85 | { |
| 86 | FILE *el_err; |
| 87 | |
| 88 | #define editing (Eflag || Vflag) |
| 89 | |
| 90 | if (iflag) { |
| 91 | if (!hist) { |
| 92 | /* |
| 93 | * turn history on |
| 94 | */ |
| 95 | INTOFF; |
| 96 | hist = history_init(); |
| 97 | INTON; |
| 98 | |
| 99 | if (hist != NULL) |
| 100 | sethistsize(histsizeval()); |
| 101 | else |
| 102 | out2str("sh: can't initialize history\n"); |
| 103 | } |
| 104 | if (editing && !el && isatty(0)) { /* && isatty(2) ??? */ |
| 105 | /* |
| 106 | * turn editing on |
| 107 | */ |
| 108 | char *term, *shname; |
| 109 | |
| 110 | INTOFF; |
| 111 | if (el_in == NULL) |
| 112 | el_in = fdopen(0, "r"); |
| 113 | if (el_out == NULL) |
| 114 | el_out = fdopen(2, "w"); |
| 115 | if (el_in == NULL || el_out == NULL) |
| 116 | goto bad; |
| 117 | el_err = el_out; |
| 118 | #if DEBUG |
| 119 | if (tracefile) |
| 120 | el_err = tracefile; |
| 121 | #endif |
| 122 | term = lookupvar("TERM"); |
| 123 | if (term) |
| 124 | setenv("TERM", term, 1); |
| 125 | else |
| 126 | unsetenv("TERM"); |
| 127 | shname = arg0; |
| 128 | if (shname[0] == '-') |
| 129 | shname++; |
| 130 | el = el_init(shname, el_in, el_out, el_err); |
| 131 | if (el != NULL) { |
| 132 | if (hist) |
| 133 | el_set(el, EL_HIST, history, hist); |
| 134 | el_set(el, EL_PROMPT, getprompt); |
| 135 | el_set(el, EL_SIGNAL, 1); |
| 136 | } else { |
| 137 | bad: |
| 138 | out2str("sh: can't initialize editing\n"); |
| 139 | } |
| 140 | INTON; |
| 141 | } else if (!editing && el) { |
| 142 | INTOFF; |
| 143 | el_end(el); |
| 144 | el = NULL; |
| 145 | INTON; |
| 146 | } |
| 147 | if (el) { |
| 148 | if (Vflag) |
| 149 | el_set(el, EL_EDITOR, "vi"); |
| 150 | else if (Eflag) |
| 151 | el_set(el, EL_EDITOR, "emacs"); |
| 152 | el_source(el, NULL); |
| 153 | } |
| 154 | } else { |
| 155 | INTOFF; |
| 156 | if (el) { /* no editing if not interactive */ |
| 157 | el_end(el); |
| 158 | el = NULL; |
| 159 | } |
| 160 | if (hist) { |
| 161 | history_end(hist); |
| 162 | hist = NULL; |
| 163 | } |
| 164 | INTON; |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | |
| 169 | void |
| 170 | sethistsize(const char *hs) |
| 171 | { |
| 172 | int histsize; |
| 173 | HistEvent he; |
| 174 | |
| 175 | if (hist != NULL) { |
| 176 | if (hs == NULL || *hs == '\0' || |
| 177 | (histsize = atoi(hs)) < 0) |
| 178 | histsize = 100; |
| 179 | history(hist, &he, H_SETSIZE, histsize); |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | void |
| 184 | setterm(const char *term) |
| 185 | { |
| 186 | if (el != NULL && term != NULL) |
| 187 | if (el_set(el, EL_TERMINAL, term) != 0) { |
| 188 | outfmt(out2, "sh: Can't set terminal type %s\n", term); |
| 189 | outfmt(out2, "sh: Using dumb terminal settings.\n"); |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | int |
| 194 | inputrc(argc, argv) |
| 195 | int argc; |
| 196 | char **argv; |
| 197 | { |
| 198 | if (argc != 2) { |
| 199 | out2str("usage: inputrc file\n"); |
| 200 | return 1; |
| 201 | } |
| 202 | if (el != NULL) { |
| 203 | if (el_source(el, argv[1])) { |
| 204 | out2str("inputrc: failed\n"); |
| 205 | return 1; |
| 206 | } else |
| 207 | return 0; |
| 208 | } else { |
| 209 | out2str("sh: inputrc ignored, not editing\n"); |
| 210 | return 1; |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | /* |
| 215 | * This command is provided since POSIX decided to standardize |
| 216 | * the Korn shell fc command. Oh well... |
| 217 | */ |
| 218 | int |
| 219 | histcmd(int argc, char **argv) |
| 220 | { |
| 221 | int ch; |
| 222 | const char *editor = NULL; |
| 223 | HistEvent he; |
| 224 | int lflg = 0, nflg = 0, rflg = 0, sflg = 0; |
| 225 | int i, retval; |
| 226 | const char *firststr, *laststr; |
| 227 | int first, last, direction; |
| 228 | char *pat = NULL, *repl; /* ksh "fc old=new" crap */ |
| 229 | static int active = 0; |
| 230 | struct jmploc jmploc; |
| 231 | struct jmploc *volatile savehandler; |
| 232 | char editfile[MAXPATHLEN + 1]; |
| 233 | FILE *efp; |
| 234 | #ifdef __GNUC__ |
| 235 | /* Avoid longjmp clobbering */ |
| 236 | (void) &editor; |
| 237 | (void) &lflg; |
| 238 | (void) &nflg; |
| 239 | (void) &rflg; |
| 240 | (void) &sflg; |
| 241 | (void) &firststr; |
| 242 | (void) &laststr; |
| 243 | (void) &pat; |
| 244 | (void) &repl; |
| 245 | (void) &efp; |
| 246 | (void) &argc; |
| 247 | (void) &argv; |
| 248 | #endif |
| 249 | |
| 250 | if (hist == NULL) |
| 251 | error("history not active"); |
| 252 | |
| 253 | if (argc == 1) |
| 254 | error("missing history argument"); |
| 255 | |
| 256 | optreset = 1; optind = 1; /* initialize getopt */ |
| 257 | while (not_fcnumber(argv[optind]) && |
| 258 | (ch = getopt(argc, argv, ":e:lnrs")) != -1) |
| 259 | switch ((char)ch) { |
| 260 | case 'e': |
| 261 | editor = optionarg; |
| 262 | break; |
| 263 | case 'l': |
| 264 | lflg = 1; |
| 265 | break; |
| 266 | case 'n': |
| 267 | nflg = 1; |
| 268 | break; |
| 269 | case 'r': |
| 270 | rflg = 1; |
| 271 | break; |
| 272 | case 's': |
| 273 | sflg = 1; |
| 274 | break; |
| 275 | case ':': |
| 276 | error("option -%c expects argument", optopt); |
| 277 | /* NOTREACHED */ |
| 278 | case '?': |
| 279 | default: |
| 280 | error("unknown option: -%c", optopt); |
| 281 | /* NOTREACHED */ |
| 282 | } |
| 283 | argc -= optind, argv += optind; |
| 284 | |
| 285 | /* |
| 286 | * If executing... |
| 287 | */ |
| 288 | if (lflg == 0 || editor || sflg) { |
| 289 | lflg = 0; /* ignore */ |
| 290 | editfile[0] = '\0'; |
| 291 | /* |
| 292 | * Catch interrupts to reset active counter and |
| 293 | * cleanup temp files. |
| 294 | */ |
| 295 | if (setjmp(jmploc.loc)) { |
| 296 | active = 0; |
| 297 | if (*editfile) |
| 298 | unlink(editfile); |
| 299 | handler = savehandler; |
| 300 | longjmp(handler->loc, 1); |
| 301 | } |
| 302 | savehandler = handler; |
| 303 | handler = &jmploc; |
| 304 | if (++active > MAXHISTLOOPS) { |
| 305 | active = 0; |
| 306 | displayhist = 0; |
| 307 | error("called recursively too many times"); |
| 308 | } |
| 309 | /* |
| 310 | * Set editor. |
| 311 | */ |
| 312 | if (sflg == 0) { |
| 313 | if (editor == NULL && |
| 314 | (editor = bltinlookup("FCEDIT", 1)) == NULL && |
| 315 | (editor = bltinlookup("EDITOR", 1)) == NULL) |
| 316 | editor = DEFEDITOR; |
| 317 | if (editor[0] == '-' && editor[1] == '\0') { |
| 318 | sflg = 1; /* no edit */ |
| 319 | editor = NULL; |
| 320 | } |
| 321 | } |
| 322 | } |
| 323 | |
| 324 | /* |
| 325 | * If executing, parse [old=new] now |
| 326 | */ |
| 327 | if (lflg == 0 && argc > 0 && |
| 328 | ((repl = strchr(argv[0], '=')) != NULL)) { |
| 329 | pat = argv[0]; |
| 330 | *repl++ = '\0'; |
| 331 | argc--, argv++; |
| 332 | } |
| 333 | /* |
| 334 | * determine [first] and [last] |
| 335 | */ |
| 336 | switch (argc) { |
| 337 | case 0: |
| 338 | firststr = lflg ? "-16" : "-1"; |
| 339 | laststr = "-1"; |
| 340 | break; |
| 341 | case 1: |
| 342 | firststr = argv[0]; |
| 343 | laststr = lflg ? "-1" : argv[0]; |
| 344 | break; |
| 345 | case 2: |
| 346 | firststr = argv[0]; |
| 347 | laststr = argv[1]; |
| 348 | break; |
| 349 | default: |
| 350 | error("too many args"); |
| 351 | /* NOTREACHED */ |
| 352 | } |
| 353 | /* |
| 354 | * Turn into event numbers. |
| 355 | */ |
| 356 | first = str_to_event(firststr, 0); |
| 357 | last = str_to_event(laststr, 1); |
| 358 | |
| 359 | if (rflg) { |
| 360 | i = last; |
| 361 | last = first; |
| 362 | first = i; |
| 363 | } |
| 364 | /* |
| 365 | * XXX - this should not depend on the event numbers |
| 366 | * always increasing. Add sequence numbers or offset |
| 367 | * to the history element in next (diskbased) release. |
| 368 | */ |
| 369 | direction = first < last ? H_PREV : H_NEXT; |
| 370 | |
| 371 | /* |
| 372 | * If editing, grab a temp file. |
| 373 | */ |
| 374 | if (editor) { |
| 375 | int fd; |
| 376 | INTOFF; /* easier */ |
| 377 | snprintf(editfile, sizeof(editfile), "%s_shXXXXXX", _PATH_TMP); |
| 378 | if ((fd = mkstemp(editfile)) < 0) |
| 379 | error("can't create temporary file %s", editfile); |
| 380 | if ((efp = fdopen(fd, "w")) == NULL) { |
| 381 | close(fd); |
| 382 | error("can't allocate stdio buffer for temp"); |
| 383 | } |
| 384 | } |
| 385 | |
| 386 | /* |
| 387 | * Loop through selected history events. If listing or executing, |
| 388 | * do it now. Otherwise, put into temp file and call the editor |
| 389 | * after. |
| 390 | * |
| 391 | * The history interface needs rethinking, as the following |
| 392 | * convolutions will demonstrate. |
| 393 | */ |
| 394 | history(hist, &he, H_FIRST); |
| 395 | retval = history(hist, &he, H_NEXT_EVENT, first); |
| 396 | for (;retval != -1; retval = history(hist, &he, direction)) { |
| 397 | if (lflg) { |
| 398 | if (!nflg) |
| 399 | out1fmt("%5d ", he.num); |
| 400 | out1str(he.str); |
| 401 | } else { |
| 402 | const char *s = pat ? |
| 403 | fc_replace(he.str, pat, repl) : he.str; |
| 404 | |
| 405 | if (sflg) { |
| 406 | if (displayhist) { |
| 407 | out2str(s); |
| 408 | } |
| 409 | |
| 410 | evalstring(strcpy(stalloc(strlen(s) + 1), s), 0); |
| 411 | if (displayhist && hist) { |
| 412 | /* |
| 413 | * XXX what about recursive and |
| 414 | * relative histnums. |
| 415 | */ |
| 416 | history(hist, &he, H_ENTER, s); |
| 417 | } |
| 418 | } else |
| 419 | fputs(s, efp); |
| 420 | } |
| 421 | /* |
| 422 | * At end? (if we were to lose last, we'd sure be |
| 423 | * messed up). |
| 424 | */ |
| 425 | if (he.num == last) |
| 426 | break; |
| 427 | } |
| 428 | if (editor) { |
| 429 | char *editcmd; |
| 430 | |
| 431 | fclose(efp); |
| 432 | editcmd = stalloc(strlen(editor) + strlen(editfile) + 2); |
| 433 | sprintf(editcmd, "%s %s", editor, editfile); |
| 434 | evalstring(editcmd, 0); /* XXX - should use no JC command */ |
| 435 | INTON; |
| 436 | readcmdfile(editfile); /* XXX - should read back - quick tst */ |
| 437 | unlink(editfile); |
| 438 | } |
| 439 | |
| 440 | if (lflg == 0 && active > 0) |
| 441 | --active; |
| 442 | if (displayhist) |
| 443 | displayhist = 0; |
| 444 | return 0; |
| 445 | } |
| 446 | |
| 447 | STATIC const char * |
| 448 | fc_replace(const char *s, char *p, char *r) |
| 449 | { |
| 450 | char *dest; |
| 451 | int plen = strlen(p); |
| 452 | |
| 453 | STARTSTACKSTR(dest); |
| 454 | while (*s) { |
| 455 | if (*s == *p && strncmp(s, p, plen) == 0) { |
| 456 | while (*r) |
| 457 | STPUTC(*r++, dest); |
| 458 | s += plen; |
| 459 | *p = '\0'; /* so no more matches */ |
| 460 | } else |
| 461 | STPUTC(*s++, dest); |
| 462 | } |
| 463 | STACKSTRNUL(dest); |
| 464 | dest = grabstackstr(dest); |
| 465 | |
| 466 | return (dest); |
| 467 | } |
| 468 | |
| 469 | int |
| 470 | not_fcnumber(char *s) |
| 471 | { |
| 472 | if (s == NULL) |
| 473 | return 0; |
| 474 | if (*s == '-') |
| 475 | s++; |
| 476 | return (!is_number(s)); |
| 477 | } |
| 478 | |
| 479 | int |
| 480 | str_to_event(const char *str, int last) |
| 481 | { |
| 482 | HistEvent he; |
| 483 | const char *s = str; |
| 484 | int relative = 0; |
| 485 | int i, retval; |
| 486 | |
| 487 | retval = history(hist, &he, H_FIRST); |
| 488 | switch (*s) { |
| 489 | case '-': |
| 490 | relative = 1; |
| 491 | /*FALLTHROUGH*/ |
| 492 | case '+': |
| 493 | s++; |
| 494 | } |
| 495 | if (is_number(s)) { |
| 496 | i = atoi(s); |
| 497 | if (relative) { |
| 498 | while (retval != -1 && i--) { |
| 499 | retval = history(hist, &he, H_NEXT); |
| 500 | } |
| 501 | if (retval == -1) |
| 502 | retval = history(hist, &he, H_LAST); |
| 503 | } else { |
| 504 | retval = history(hist, &he, H_NEXT_EVENT, i); |
| 505 | if (retval == -1) { |
| 506 | /* |
| 507 | * the notion of first and last is |
| 508 | * backwards to that of the history package |
| 509 | */ |
| 510 | retval = history(hist, &he, |
| 511 | last ? H_FIRST : H_LAST); |
| 512 | } |
| 513 | } |
| 514 | if (retval == -1) |
| 515 | error("history number %s not found (internal error)", |
| 516 | str); |
| 517 | } else { |
| 518 | /* |
| 519 | * pattern |
| 520 | */ |
| 521 | retval = history(hist, &he, H_PREV_STR, str); |
| 522 | if (retval == -1) |
| 523 | error("history pattern not found: %s", str); |
| 524 | } |
| 525 | return (he.num); |
| 526 | } |
| 527 | #else |
| 528 | int |
| 529 | histcmd(int argc, char **argv) |
| 530 | { |
| 531 | error("not compiled with history support"); |
| 532 | /* NOTREACHED */ |
| 533 | } |
| 534 | int |
| 535 | inputrc(int argc, char **argv) |
| 536 | { |
| 537 | error("not compiled with history support"); |
| 538 | /* NOTREACHED */ |
| 539 | } |
| 540 | #endif |