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