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