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 #include "builtins.h" 63 64 #define MAXHISTLOOPS 4 /* max recursions through fc */ 65 #define DEFEDITOR "ed" /* default editor *should* be $EDITOR */ 66 67 History *hist; /* history cookie */ 68 EditLine *el; /* editline cookie */ 69 int displayhist; 70 static FILE *el_in, *el_out, *el_err; 71 72 static char *fc_replace(const char *, char *, char *); 73 static int not_fcnumber(const char *); 74 static int str_to_event(const char *, int); 75 76 /* 77 * Set history and editing status. Called whenever the status may 78 * have changed (figures out what to do). 79 */ 80 void 81 histedit(void) 82 { 83 84 #define editing (Eflag || Vflag) 85 86 if (iflag) { 87 if (!hist) { 88 /* 89 * turn history on 90 */ 91 INTOFF; 92 hist = history_init(); 93 INTON; 94 95 if (hist != NULL) 96 sethistsize(histsizeval()); 97 else 98 out2fmt_flush("sh: can't initialize history\n"); 99 } 100 if (editing && !el && isatty(0)) { /* && isatty(2) ??? */ 101 /* 102 * turn editing on 103 */ 104 char *term; 105 106 INTOFF; 107 if (el_in == NULL) 108 el_in = fdopen(0, "r"); 109 if (el_err == NULL) 110 el_err = fdopen(1, "w"); 111 if (el_out == NULL) 112 el_out = fdopen(2, "w"); 113 if (el_in == NULL || el_err == NULL || el_out == NULL) 114 goto bad; 115 term = lookupvar("TERM"); 116 if (term) 117 setenv("TERM", term, 1); 118 else 119 unsetenv("TERM"); 120 el = el_init(arg0, el_in, el_out, el_err); 121 if (el != NULL) { 122 if (hist) 123 el_set(el, EL_HIST, history, hist); 124 el_set(el, EL_PROMPT, getprompt); 125 el_set(el, EL_ADDFN, "sh-complete", 126 "Filename completion", 127 _el_fn_sh_complete); 128 } else { 129 bad: 130 out2fmt_flush("sh: can't initialize editing\n"); 131 } 132 INTON; 133 } else if (!editing && el) { 134 INTOFF; 135 el_end(el); 136 el = NULL; 137 INTON; 138 } 139 if (el) { 140 if (Vflag) 141 el_set(el, EL_EDITOR, "vi"); 142 else if (Eflag) 143 el_set(el, EL_EDITOR, "emacs"); 144 el_set(el, EL_BIND, "^I", "sh-complete", NULL); 145 el_source(el, NULL); 146 } 147 } else { 148 INTOFF; 149 if (el) { /* no editing if not interactive */ 150 el_end(el); 151 el = NULL; 152 } 153 if (hist) { 154 history_end(hist); 155 hist = NULL; 156 } 157 INTON; 158 } 159 } 160 161 162 void 163 sethistsize(hs) 164 const char *hs; 165 { 166 int histsize; 167 HistEvent he; 168 169 if (hist != NULL) { 170 if (hs == NULL || *hs == '\0' || 171 (histsize = atoi(hs)) < 0) 172 histsize = 100; 173 history(hist, &he, H_SETSIZE, histsize); 174 history(hist, &he, H_SETUNIQUE, 1); 175 } 176 } 177 178 void 179 setterm(const char *term) 180 { 181 if (rootshell && el != NULL && term != NULL) 182 el_set(el, EL_TERMINAL, term); 183 } 184 185 int 186 histcmd(int argc, char **argv) 187 { 188 int ch; 189 const char *editor = NULL; 190 HistEvent he; 191 int lflg = 0, nflg = 0, rflg = 0, sflg = 0; 192 int i, retval; 193 const char *firststr, *laststr; 194 int first, last, direction; 195 char *pat = NULL, *repl = NULL; 196 static int active = 0; 197 struct jmploc jmploc; 198 struct jmploc *savehandler; 199 char editfilestr[PATH_MAX]; 200 char *volatile editfile; 201 FILE *efp = NULL; 202 int oldhistnum; 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 savehandler = handler; 239 /* 240 * If executing... 241 */ 242 if (lflg == 0 || editor || sflg) { 243 lflg = 0; /* ignore */ 244 editfile = NULL; 245 /* 246 * Catch interrupts to reset active counter and 247 * cleanup temp files. 248 */ 249 if (setjmp(jmploc.loc)) { 250 active = 0; 251 if (editfile) 252 unlink(editfile); 253 handler = savehandler; 254 longjmp(handler->loc, 1); 255 } 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 arguments"); 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(editfilestr, "%s/_shXXXXXX", _PATH_TMP); 330 if ((fd = mkstemp(editfilestr)) < 0) 331 error("can't create temporary file %s", editfile); 332 editfile = editfilestr; 333 if ((efp = fdopen(fd, "w")) == NULL) { 334 close(fd); 335 error("Out of space"); 336 } 337 } 338 339 /* 340 * Loop through selected history events. If listing or executing, 341 * do it now. Otherwise, put into temp file and call the editor 342 * after. 343 * 344 * The history interface needs rethinking, as the following 345 * convolutions will demonstrate. 346 */ 347 history(hist, &he, H_FIRST); 348 retval = history(hist, &he, H_NEXT_EVENT, first); 349 for (;retval != -1; retval = history(hist, &he, direction)) { 350 if (lflg) { 351 if (!nflg) 352 out1fmt("%5d ", he.num); 353 out1str(he.str); 354 } else { 355 char *s = pat ? 356 fc_replace(he.str, pat, repl) : (char *)he.str; 357 358 if (sflg) { 359 if (displayhist) { 360 out2str(s); 361 flushout(out2); 362 } 363 evalstring(s, 0); 364 if (displayhist && hist) { 365 /* 366 * XXX what about recursive and 367 * relative histnums. 368 */ 369 oldhistnum = he.num; 370 history(hist, &he, H_ENTER, s); 371 /* 372 * XXX H_ENTER moves the internal 373 * cursor, set it back to the current 374 * entry. 375 */ 376 retval = history(hist, &he, 377 H_NEXT_EVENT, oldhistnum); 378 } 379 } else 380 fputs(s, efp); 381 } 382 /* 383 * At end? (if we were to lose last, we'd sure be 384 * messed up). 385 */ 386 if (he.num == last) 387 break; 388 } 389 if (editor) { 390 char *editcmd; 391 392 fclose(efp); 393 editcmd = stalloc(strlen(editor) + strlen(editfile) + 2); 394 sprintf(editcmd, "%s %s", editor, editfile); 395 evalstring(editcmd, 0); /* XXX - should use no JC command */ 396 INTON; 397 readcmdfile(editfile); /* XXX - should read back - quick tst */ 398 unlink(editfile); 399 } 400 401 if (lflg == 0 && active > 0) 402 --active; 403 if (displayhist) 404 displayhist = 0; 405 handler = savehandler; 406 return 0; 407 } 408 409 static char * 410 fc_replace(const char *s, char *p, char *r) 411 { 412 char *dest; 413 int plen = strlen(p); 414 415 STARTSTACKSTR(dest); 416 while (*s) { 417 if (*s == *p && strncmp(s, p, plen) == 0) { 418 STPUTS(r, dest); 419 s += plen; 420 *p = '\0'; /* so no more matches */ 421 } else 422 STPUTC(*s++, dest); 423 } 424 STPUTC('\0', dest); 425 dest = grabstackstr(dest); 426 427 return (dest); 428 } 429 430 static int 431 not_fcnumber(const char *s) 432 { 433 if (s == NULL) 434 return (0); 435 if (*s == '-') 436 s++; 437 return (!is_number(s)); 438 } 439 440 static int 441 str_to_event(const char *str, int last) 442 { 443 HistEvent he; 444 const char *s = str; 445 int relative = 0; 446 int i, retval; 447 448 retval = history(hist, &he, H_FIRST); 449 switch (*s) { 450 case '-': 451 relative = 1; 452 /*FALLTHROUGH*/ 453 case '+': 454 s++; 455 } 456 if (is_number(s)) { 457 i = atoi(s); 458 if (relative) { 459 while (retval != -1 && i--) { 460 retval = history(hist, &he, H_NEXT); 461 } 462 if (retval == -1) 463 retval = history(hist, &he, H_LAST); 464 } else { 465 retval = history(hist, &he, H_NEXT_EVENT, i); 466 if (retval == -1) { 467 /* 468 * the notion of first and last is 469 * backwards to that of the history package 470 */ 471 retval = history(hist, &he, last ? H_FIRST : H_LAST); 472 } 473 } 474 if (retval == -1) 475 error("history number %s not found (internal error)", 476 str); 477 } else { 478 /* 479 * pattern 480 */ 481 retval = history(hist, &he, H_PREV_STR, str); 482 if (retval == -1) 483 error("history pattern not found: %s", str); 484 } 485 return (he.num); 486 } 487 488 int 489 bindcmd(int argc, char **argv) 490 { 491 492 if (el == NULL) 493 error("line editing is disabled"); 494 return (el_parse(el, argc, (const char **)argv)); 495 } 496 497 #else 498 #include "error.h" 499 500 int 501 histcmd(int argc, char **argv) 502 { 503 504 error("not compiled with history support"); 505 /*NOTREACHED*/ 506 return (0); 507 } 508 509 int 510 bindcmd(int argc, char **argv) 511 { 512 513 error("not compiled with line editing support"); 514 return (0); 515 } 516 #endif 517