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 static const char rcsid[] = 42 "$FreeBSD$"; 43 #endif /* not lint */ 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 } 136 } else { 137 INTOFF; 138 if (el) { /* no editing if not interactive */ 139 el_end(el); 140 el = NULL; 141 } 142 if (hist) { 143 history_end(hist); 144 hist = NULL; 145 } 146 INTON; 147 } 148 } 149 150 151 void 152 sethistsize(hs) 153 const char *hs; 154 { 155 int histsize; 156 HistEvent he; 157 158 if (hist != NULL) { 159 if (hs == NULL || *hs == '\0' || 160 (histsize = atoi(hs)) < 0) 161 histsize = 100; 162 history(hist, &he, H_EVENT, histsize); 163 } 164 } 165 166 /* 167 * This command is provided since POSIX decided to standardize 168 * the Korn shell fc command. Oh well... 169 */ 170 int 171 histcmd(int argc, char **argv) 172 { 173 int ch; 174 char *editor = NULL; 175 HistEvent he; 176 int lflg = 0, nflg = 0, rflg = 0, sflg = 0; 177 int i, retval; 178 char *firststr, *laststr; 179 int first, last, direction; 180 char *pat = NULL, *repl; /* ksh "fc old=new" crap */ 181 static int active = 0; 182 struct jmploc jmploc; 183 struct jmploc *volatile savehandler; 184 char editfile[PATH_MAX]; 185 FILE *efp; 186 int oldhistnum; 187 #ifdef __GNUC__ 188 /* Avoid longjmp clobbering */ 189 (void) &editor; 190 (void) &lflg; 191 (void) &nflg; 192 (void) &rflg; 193 (void) &sflg; 194 (void) &firststr; 195 (void) &laststr; 196 (void) &pat; 197 (void) &repl; 198 (void) &efp; 199 (void) &argc; 200 (void) &argv; 201 #endif 202 203 if (hist == NULL) 204 error("history not active"); 205 206 if (argc == 1) 207 error("missing history argument"); 208 209 optreset = 1; optind = 1; /* initialize getopt */ 210 while (not_fcnumber(argv[optind]) && 211 (ch = getopt(argc, argv, ":e:lnrs")) != -1) 212 switch ((char)ch) { 213 case 'e': 214 editor = optarg; 215 break; 216 case 'l': 217 lflg = 1; 218 break; 219 case 'n': 220 nflg = 1; 221 break; 222 case 'r': 223 rflg = 1; 224 break; 225 case 's': 226 sflg = 1; 227 break; 228 case ':': 229 error("option -%c expects argument", optopt); 230 case '?': 231 default: 232 error("unknown option: -%c", optopt); 233 } 234 argc -= optind, argv += optind; 235 236 /* 237 * If executing... 238 */ 239 if (lflg == 0 || editor || sflg) { 240 lflg = 0; /* ignore */ 241 editfile[0] = '\0'; 242 /* 243 * Catch interrupts to reset active counter and 244 * cleanup temp files. 245 */ 246 if (setjmp(jmploc.loc)) { 247 active = 0; 248 if (*editfile) 249 unlink(editfile); 250 handler = savehandler; 251 longjmp(handler->loc, 1); 252 } 253 savehandler = handler; 254 handler = &jmploc; 255 if (++active > MAXHISTLOOPS) { 256 active = 0; 257 displayhist = 0; 258 error("called recursively too many times"); 259 } 260 /* 261 * Set editor. 262 */ 263 if (sflg == 0) { 264 if (editor == NULL && 265 (editor = bltinlookup("FCEDIT", 1)) == NULL && 266 (editor = bltinlookup("EDITOR", 1)) == NULL) 267 editor = DEFEDITOR; 268 if (editor[0] == '-' && editor[1] == '\0') { 269 sflg = 1; /* no edit */ 270 editor = NULL; 271 } 272 } 273 } 274 275 /* 276 * If executing, parse [old=new] now 277 */ 278 if (lflg == 0 && argc > 0 && 279 ((repl = strchr(argv[0], '=')) != NULL)) { 280 pat = argv[0]; 281 *repl++ = '\0'; 282 argc--, argv++; 283 } 284 /* 285 * determine [first] and [last] 286 */ 287 switch (argc) { 288 case 0: 289 firststr = lflg ? "-16" : "-1"; 290 laststr = "-1"; 291 break; 292 case 1: 293 firststr = argv[0]; 294 laststr = lflg ? "-1" : argv[0]; 295 break; 296 case 2: 297 firststr = argv[0]; 298 laststr = argv[1]; 299 break; 300 default: 301 error("too many args"); 302 } 303 /* 304 * Turn into event numbers. 305 */ 306 first = str_to_event(firststr, 0); 307 last = str_to_event(laststr, 1); 308 309 if (rflg) { 310 i = last; 311 last = first; 312 first = i; 313 } 314 /* 315 * XXX - this should not depend on the event numbers 316 * always increasing. Add sequence numbers or offset 317 * to the history element in next (diskbased) release. 318 */ 319 direction = first < last ? H_PREV : H_NEXT; 320 321 /* 322 * If editing, grab a temp file. 323 */ 324 if (editor) { 325 int fd; 326 INTOFF; /* easier */ 327 sprintf(editfile, "%s/_shXXXXXX", _PATH_TMP); 328 if ((fd = mkstemp(editfile)) < 0) 329 error("can't create temporary file %s", editfile); 330 if ((efp = fdopen(fd, "w")) == NULL) { 331 close(fd); 332 error("can't allocate stdio buffer for temp"); 333 } 334 } 335 336 /* 337 * Loop through selected history events. If listing or executing, 338 * do it now. Otherwise, put into temp file and call the editor 339 * after. 340 * 341 * The history interface needs rethinking, as the following 342 * convolutions will demonstrate. 343 */ 344 history(hist, &he, H_FIRST); 345 retval = history(hist, &he, H_NEXT_EVENT, first); 346 for (;retval != -1; retval = history(hist, &he, direction)) { 347 if (lflg) { 348 if (!nflg) 349 out1fmt("%5d ", he.num); 350 out1str(he.str); 351 } else { 352 char *s = pat ? 353 fc_replace(he.str, pat, repl) : (char *)he.str; 354 355 if (sflg) { 356 if (displayhist) { 357 out2str(s); 358 } 359 evalstring(s); 360 if (displayhist && hist) { 361 /* 362 * XXX what about recursive and 363 * relative histnums. 364 */ 365 oldhistnum = he.num; 366 history(hist, &he, H_ENTER, s); 367 /* 368 * XXX H_ENTER moves the internal 369 * cursor, set it back to the current 370 * entry. 371 */ 372 retval = history(hist, &he, 373 H_NEXT_EVENT, oldhistnum); 374 } 375 } else 376 fputs(s, efp); 377 } 378 /* 379 * At end? (if we were to loose last, we'd sure be 380 * messed up). 381 */ 382 if (he.num == last) 383 break; 384 } 385 if (editor) { 386 char *editcmd; 387 388 fclose(efp); 389 editcmd = stalloc(strlen(editor) + strlen(editfile) + 2); 390 sprintf(editcmd, "%s %s", editor, editfile); 391 evalstring(editcmd); /* XXX - should use no JC command */ 392 INTON; 393 readcmdfile(editfile); /* XXX - should read back - quick tst */ 394 unlink(editfile); 395 } 396 397 if (lflg == 0 && active > 0) 398 --active; 399 if (displayhist) 400 displayhist = 0; 401 return 0; 402 } 403 404 STATIC char * 405 fc_replace(const char *s, char *p, char *r) 406 { 407 char *dest; 408 int plen = strlen(p); 409 410 STARTSTACKSTR(dest); 411 while (*s) { 412 if (*s == *p && strncmp(s, p, plen) == 0) { 413 while (*r) 414 STPUTC(*r++, dest); 415 s += plen; 416 *p = '\0'; /* so no more matches */ 417 } else 418 STPUTC(*s++, dest); 419 } 420 STACKSTRNUL(dest); 421 dest = grabstackstr(dest); 422 423 return (dest); 424 } 425 426 int 427 not_fcnumber(char *s) 428 { 429 if (s == NULL) 430 return (0); 431 if (*s == '-') 432 s++; 433 return (!is_number(s)); 434 } 435 436 int 437 str_to_event(char *str, int last) 438 { 439 HistEvent he; 440 char *s = str; 441 int relative = 0; 442 int i, retval; 443 444 retval = history(hist, &he, H_FIRST); 445 switch (*s) { 446 case '-': 447 relative = 1; 448 /*FALLTHROUGH*/ 449 case '+': 450 s++; 451 } 452 if (is_number(s)) { 453 i = atoi(s); 454 if (relative) { 455 while (retval != -1 && i--) { 456 retval = history(hist, &he, H_NEXT); 457 } 458 if (retval == -1) 459 retval = history(hist, &he, H_LAST); 460 } else { 461 retval = history(hist, &he, H_NEXT_EVENT, i); 462 if (retval == -1) { 463 /* 464 * the notion of first and last is 465 * backwards to that of the history package 466 */ 467 retval = history(hist, &he, last ? H_FIRST : H_LAST); 468 } 469 } 470 if (retval == -1) 471 error("history number %s not found (internal error)", 472 str); 473 } else { 474 /* 475 * pattern 476 */ 477 retval = history(hist, &he, H_PREV_STR, str); 478 if (retval == -1) 479 error("history pattern not found: %s", str); 480 } 481 return (he.num); 482 } 483 #else 484 #include "error.h" 485 486 int 487 histcmd(int argc, char **argv) 488 { 489 490 error("not compiled with history support"); 491 /*NOTREACHED*/ 492 return (0); 493 } 494 #endif 495