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(const char *hs) 164 { 165 int histsize; 166 HistEvent he; 167 168 if (hist != NULL) { 169 if (hs == NULL || *hs == '\0' || 170 (histsize = atoi(hs)) < 0) 171 histsize = 100; 172 history(hist, &he, H_SETSIZE, histsize); 173 history(hist, &he, H_SETUNIQUE, 1); 174 } 175 } 176 177 void 178 setterm(const char *term) 179 { 180 if (rootshell && el != NULL && term != NULL) 181 el_set(el, EL_TERMINAL, term); 182 } 183 184 int 185 histcmd(int argc, char **argv) 186 { 187 int ch; 188 const char *editor = NULL; 189 HistEvent he; 190 int lflg = 0, nflg = 0, rflg = 0, sflg = 0; 191 int i, retval; 192 const char *firststr, *laststr; 193 int first, last, direction; 194 char *pat = NULL, *repl = NULL; 195 static int active = 0; 196 struct jmploc jmploc; 197 struct jmploc *savehandler; 198 char editfilestr[PATH_MAX]; 199 char *volatile editfile; 200 FILE *efp = NULL; 201 int oldhistnum; 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 opterr = 0; 211 while (not_fcnumber(argv[optind]) && 212 (ch = getopt(argc, argv, ":e:lnrs")) != -1) 213 switch ((char)ch) { 214 case 'e': 215 editor = optarg; 216 break; 217 case 'l': 218 lflg = 1; 219 break; 220 case 'n': 221 nflg = 1; 222 break; 223 case 'r': 224 rflg = 1; 225 break; 226 case 's': 227 sflg = 1; 228 break; 229 case ':': 230 error("option -%c expects argument", optopt); 231 case '?': 232 default: 233 error("unknown option: -%c", optopt); 234 } 235 argc -= optind, argv += optind; 236 237 savehandler = handler; 238 /* 239 * If executing... 240 */ 241 if (lflg == 0 || editor || sflg) { 242 lflg = 0; /* ignore */ 243 editfile = NULL; 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 handler = &jmploc; 256 if (++active > MAXHISTLOOPS) { 257 active = 0; 258 displayhist = 0; 259 error("called recursively too many times"); 260 } 261 /* 262 * Set editor. 263 */ 264 if (sflg == 0) { 265 if (editor == NULL && 266 (editor = bltinlookup("FCEDIT", 1)) == NULL && 267 (editor = bltinlookup("EDITOR", 1)) == NULL) 268 editor = DEFEDITOR; 269 if (editor[0] == '-' && editor[1] == '\0') { 270 sflg = 1; /* no edit */ 271 editor = NULL; 272 } 273 } 274 } 275 276 /* 277 * If executing, parse [old=new] now 278 */ 279 if (lflg == 0 && argc > 0 && 280 ((repl = strchr(argv[0], '=')) != NULL)) { 281 pat = argv[0]; 282 *repl++ = '\0'; 283 argc--, argv++; 284 } 285 /* 286 * determine [first] and [last] 287 */ 288 switch (argc) { 289 case 0: 290 firststr = lflg ? "-16" : "-1"; 291 laststr = "-1"; 292 break; 293 case 1: 294 firststr = argv[0]; 295 laststr = lflg ? "-1" : argv[0]; 296 break; 297 case 2: 298 firststr = argv[0]; 299 laststr = argv[1]; 300 break; 301 default: 302 error("too many arguments"); 303 } 304 /* 305 * Turn into event numbers. 306 */ 307 first = str_to_event(firststr, 0); 308 last = str_to_event(laststr, 1); 309 310 if (rflg) { 311 i = last; 312 last = first; 313 first = i; 314 } 315 /* 316 * XXX - this should not depend on the event numbers 317 * always increasing. Add sequence numbers or offset 318 * to the history element in next (diskbased) release. 319 */ 320 direction = first < last ? H_PREV : H_NEXT; 321 322 /* 323 * If editing, grab a temp file. 324 */ 325 if (editor) { 326 int fd; 327 INTOFF; /* easier */ 328 sprintf(editfilestr, "%s/_shXXXXXX", _PATH_TMP); 329 if ((fd = mkstemp(editfilestr)) < 0) 330 error("can't create temporary file %s", editfile); 331 editfile = editfilestr; 332 if ((efp = fdopen(fd, "w")) == NULL) { 333 close(fd); 334 error("Out of space"); 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 flushout(out2); 361 } 362 evalstring(s, 0); 363 if (displayhist && hist) { 364 /* 365 * XXX what about recursive and 366 * relative histnums. 367 */ 368 oldhistnum = he.num; 369 history(hist, &he, H_ENTER, s); 370 /* 371 * XXX H_ENTER moves the internal 372 * cursor, set it back to the current 373 * entry. 374 */ 375 retval = history(hist, &he, 376 H_NEXT_EVENT, oldhistnum); 377 } 378 } else 379 fputs(s, efp); 380 } 381 /* 382 * At end? (if we were to lose last, we'd sure be 383 * messed up). 384 */ 385 if (he.num == last) 386 break; 387 } 388 if (editor) { 389 char *editcmd; 390 391 fclose(efp); 392 editcmd = stalloc(strlen(editor) + strlen(editfile) + 2); 393 sprintf(editcmd, "%s %s", editor, editfile); 394 evalstring(editcmd, 0); /* XXX - should use no JC command */ 395 INTON; 396 readcmdfile(editfile); /* XXX - should read back - quick tst */ 397 unlink(editfile); 398 } 399 400 if (lflg == 0 && active > 0) 401 --active; 402 if (displayhist) 403 displayhist = 0; 404 handler = savehandler; 405 return 0; 406 } 407 408 static char * 409 fc_replace(const char *s, char *p, char *r) 410 { 411 char *dest; 412 int plen = strlen(p); 413 414 STARTSTACKSTR(dest); 415 while (*s) { 416 if (*s == *p && strncmp(s, p, plen) == 0) { 417 STPUTS(r, dest); 418 s += plen; 419 *p = '\0'; /* so no more matches */ 420 } else 421 STPUTC(*s++, dest); 422 } 423 STPUTC('\0', dest); 424 dest = grabstackstr(dest); 425 426 return (dest); 427 } 428 429 static int 430 not_fcnumber(const char *s) 431 { 432 if (s == NULL) 433 return (0); 434 if (*s == '-') 435 s++; 436 return (!is_number(s)); 437 } 438 439 static int 440 str_to_event(const char *str, int last) 441 { 442 HistEvent he; 443 const char *s = str; 444 int relative = 0; 445 int i, retval; 446 447 retval = history(hist, &he, H_FIRST); 448 switch (*s) { 449 case '-': 450 relative = 1; 451 /*FALLTHROUGH*/ 452 case '+': 453 s++; 454 } 455 if (is_number(s)) { 456 i = atoi(s); 457 if (relative) { 458 while (retval != -1 && i--) { 459 retval = history(hist, &he, H_NEXT); 460 } 461 if (retval == -1) 462 retval = history(hist, &he, H_LAST); 463 } else { 464 retval = history(hist, &he, H_NEXT_EVENT, i); 465 if (retval == -1) { 466 /* 467 * the notion of first and last is 468 * backwards to that of the history package 469 */ 470 retval = history(hist, &he, last ? H_FIRST : H_LAST); 471 } 472 } 473 if (retval == -1) 474 error("history number %s not found (internal error)", 475 str); 476 } else { 477 /* 478 * pattern 479 */ 480 retval = history(hist, &he, H_PREV_STR, str); 481 if (retval == -1) 482 error("history pattern not found: %s", str); 483 } 484 return (he.num); 485 } 486 487 int 488 bindcmd(int argc, char **argv) 489 { 490 491 if (el == NULL) 492 error("line editing is disabled"); 493 return (el_parse(el, argc, (const char **)argv)); 494 } 495 496 #else 497 #include "error.h" 498 499 int 500 histcmd(int argc, char **argv) 501 { 502 503 error("not compiled with history support"); 504 /*NOTREACHED*/ 505 return (0); 506 } 507 508 int 509 bindcmd(int argc, char **argv) 510 { 511 512 error("not compiled with line editing support"); 513 return (0); 514 } 515 #endif 516