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 out2fmt_flush("sh: can't initialize history\n"); 96 } 97 if (editing && !el && isatty(0)) { /* && isatty(2) ??? */ 98 /* 99 * turn editing on 100 */ 101 char *term; 102 103 INTOFF; 104 if (el_in == NULL) 105 el_in = fdopen(0, "r"); 106 if (el_err == NULL) 107 el_err = fdopen(1, "w"); 108 if (el_out == NULL) 109 el_out = fdopen(2, "w"); 110 if (el_in == NULL || el_err == NULL || el_out == NULL) 111 goto bad; 112 term = lookupvar("TERM"); 113 if (term) 114 setenv("TERM", term, 1); 115 else 116 unsetenv("TERM"); 117 el = el_init(arg0, el_in, el_out, el_err); 118 if (el != NULL) { 119 if (hist) 120 el_set(el, EL_HIST, history, hist); 121 el_set(el, EL_PROMPT, getprompt); 122 el_set(el, EL_ADDFN, "sh-complete", 123 "Filename completion", 124 _el_fn_sh_complete); 125 } else { 126 bad: 127 out2fmt_flush("sh: can't initialize editing\n"); 128 } 129 INTON; 130 } else if (!editing && el) { 131 INTOFF; 132 el_end(el); 133 el = NULL; 134 INTON; 135 } 136 if (el) { 137 if (Vflag) 138 el_set(el, EL_EDITOR, "vi"); 139 else if (Eflag) 140 el_set(el, EL_EDITOR, "emacs"); 141 el_set(el, EL_BIND, "^I", "sh-complete", NULL); 142 el_source(el, NULL); 143 } 144 } else { 145 INTOFF; 146 if (el) { /* no editing if not interactive */ 147 el_end(el); 148 el = NULL; 149 } 150 if (hist) { 151 history_end(hist); 152 hist = NULL; 153 } 154 INTON; 155 } 156 } 157 158 159 void 160 sethistsize(hs) 161 const char *hs; 162 { 163 int histsize; 164 HistEvent he; 165 166 if (hist != NULL) { 167 if (hs == NULL || *hs == '\0' || 168 (histsize = atoi(hs)) < 0) 169 histsize = 100; 170 history(hist, &he, H_SETSIZE, histsize); 171 history(hist, &he, H_SETUNIQUE, 1); 172 } 173 } 174 175 void 176 setterm(const char *term) 177 { 178 if (rootshell && el != NULL && term != NULL) 179 el_set(el, EL_TERMINAL, term); 180 } 181 182 int 183 histcmd(int argc, char **argv) 184 { 185 int ch; 186 const char *editor = NULL; 187 HistEvent he; 188 int lflg = 0, nflg = 0, rflg = 0, sflg = 0; 189 int i, retval; 190 const char *firststr, *laststr; 191 int first, last, direction; 192 char *pat = NULL, *repl = NULL; 193 static int active = 0; 194 struct jmploc jmploc; 195 struct jmploc *savehandler; 196 char editfilestr[PATH_MAX]; 197 char *volatile editfile; 198 FILE *efp = NULL; 199 int oldhistnum; 200 201 if (hist == NULL) 202 error("history not active"); 203 204 if (argc == 1) 205 error("missing history argument"); 206 207 optreset = 1; optind = 1; /* initialize getopt */ 208 opterr = 0; 209 while (not_fcnumber(argv[optind]) && 210 (ch = getopt(argc, argv, ":e:lnrs")) != -1) 211 switch ((char)ch) { 212 case 'e': 213 editor = optarg; 214 break; 215 case 'l': 216 lflg = 1; 217 break; 218 case 'n': 219 nflg = 1; 220 break; 221 case 'r': 222 rflg = 1; 223 break; 224 case 's': 225 sflg = 1; 226 break; 227 case ':': 228 error("option -%c expects argument", optopt); 229 case '?': 230 default: 231 error("unknown option: -%c", optopt); 232 } 233 argc -= optind, argv += optind; 234 235 /* 236 * If executing... 237 */ 238 if (lflg == 0 || editor || sflg) { 239 lflg = 0; /* ignore */ 240 editfile = NULL; 241 /* 242 * Catch interrupts to reset active counter and 243 * cleanup temp files. 244 */ 245 savehandler = handler; 246 if (setjmp(jmploc.loc)) { 247 active = 0; 248 if (editfile) 249 unlink(editfile); 250 handler = savehandler; 251 longjmp(handler->loc, 1); 252 } 253 handler = &jmploc; 254 if (++active > MAXHISTLOOPS) { 255 active = 0; 256 displayhist = 0; 257 error("called recursively too many times"); 258 } 259 /* 260 * Set editor. 261 */ 262 if (sflg == 0) { 263 if (editor == NULL && 264 (editor = bltinlookup("FCEDIT", 1)) == NULL && 265 (editor = bltinlookup("EDITOR", 1)) == NULL) 266 editor = DEFEDITOR; 267 if (editor[0] == '-' && editor[1] == '\0') { 268 sflg = 1; /* no edit */ 269 editor = NULL; 270 } 271 } 272 } 273 274 /* 275 * If executing, parse [old=new] now 276 */ 277 if (lflg == 0 && argc > 0 && 278 ((repl = strchr(argv[0], '=')) != NULL)) { 279 pat = argv[0]; 280 *repl++ = '\0'; 281 argc--, argv++; 282 } 283 /* 284 * determine [first] and [last] 285 */ 286 switch (argc) { 287 case 0: 288 firststr = lflg ? "-16" : "-1"; 289 laststr = "-1"; 290 break; 291 case 1: 292 firststr = argv[0]; 293 laststr = lflg ? "-1" : argv[0]; 294 break; 295 case 2: 296 firststr = argv[0]; 297 laststr = argv[1]; 298 break; 299 default: 300 error("too many args"); 301 } 302 /* 303 * Turn into event numbers. 304 */ 305 first = str_to_event(firststr, 0); 306 last = str_to_event(laststr, 1); 307 308 if (rflg) { 309 i = last; 310 last = first; 311 first = i; 312 } 313 /* 314 * XXX - this should not depend on the event numbers 315 * always increasing. Add sequence numbers or offset 316 * to the history element in next (diskbased) release. 317 */ 318 direction = first < last ? H_PREV : H_NEXT; 319 320 /* 321 * If editing, grab a temp file. 322 */ 323 if (editor) { 324 int fd; 325 INTOFF; /* easier */ 326 sprintf(editfilestr, "%s/_shXXXXXX", _PATH_TMP); 327 if ((fd = mkstemp(editfilestr)) < 0) 328 error("can't create temporary file %s", editfile); 329 editfile = editfilestr; 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 flushout(out2); 359 } 360 evalstring(s, 0); 361 if (displayhist && hist) { 362 /* 363 * XXX what about recursive and 364 * relative histnums. 365 */ 366 oldhistnum = he.num; 367 history(hist, &he, H_ENTER, s); 368 /* 369 * XXX H_ENTER moves the internal 370 * cursor, set it back to the current 371 * entry. 372 */ 373 retval = history(hist, &he, 374 H_NEXT_EVENT, oldhistnum); 375 } 376 } else 377 fputs(s, efp); 378 } 379 /* 380 * At end? (if we were to lose last, we'd sure be 381 * messed up). 382 */ 383 if (he.num == last) 384 break; 385 } 386 if (editor) { 387 char *editcmd; 388 389 fclose(efp); 390 editcmd = stalloc(strlen(editor) + strlen(editfile) + 2); 391 sprintf(editcmd, "%s %s", editor, editfile); 392 evalstring(editcmd, 0); /* XXX - should use no JC command */ 393 INTON; 394 readcmdfile(editfile); /* XXX - should read back - quick tst */ 395 unlink(editfile); 396 } 397 398 if (lflg == 0 && active > 0) 399 --active; 400 if (displayhist) 401 displayhist = 0; 402 return 0; 403 } 404 405 STATIC char * 406 fc_replace(const char *s, char *p, char *r) 407 { 408 char *dest; 409 int plen = strlen(p); 410 411 STARTSTACKSTR(dest); 412 while (*s) { 413 if (*s == *p && strncmp(s, p, plen) == 0) { 414 while (*r) 415 STPUTC(*r++, dest); 416 s += plen; 417 *p = '\0'; /* so no more matches */ 418 } else 419 STPUTC(*s++, dest); 420 } 421 STACKSTRNUL(dest); 422 dest = grabstackstr(dest); 423 424 return (dest); 425 } 426 427 int 428 not_fcnumber(const char *s) 429 { 430 if (s == NULL) 431 return (0); 432 if (*s == '-') 433 s++; 434 return (!is_number(s)); 435 } 436 437 int 438 str_to_event(const char *str, int last) 439 { 440 HistEvent he; 441 const char *s = str; 442 int relative = 0; 443 int i, retval; 444 445 retval = history(hist, &he, H_FIRST); 446 switch (*s) { 447 case '-': 448 relative = 1; 449 /*FALLTHROUGH*/ 450 case '+': 451 s++; 452 } 453 if (is_number(s)) { 454 i = atoi(s); 455 if (relative) { 456 while (retval != -1 && i--) { 457 retval = history(hist, &he, H_NEXT); 458 } 459 if (retval == -1) 460 retval = history(hist, &he, H_LAST); 461 } else { 462 retval = history(hist, &he, H_NEXT_EVENT, i); 463 if (retval == -1) { 464 /* 465 * the notion of first and last is 466 * backwards to that of the history package 467 */ 468 retval = history(hist, &he, last ? H_FIRST : H_LAST); 469 } 470 } 471 if (retval == -1) 472 error("history number %s not found (internal error)", 473 str); 474 } else { 475 /* 476 * pattern 477 */ 478 retval = history(hist, &he, H_PREV_STR, str); 479 if (retval == -1) 480 error("history pattern not found: %s", str); 481 } 482 return (he.num); 483 } 484 485 int 486 bindcmd(int argc, char **argv) 487 { 488 489 if (el == NULL) 490 error("line editing is disabled"); 491 return (el_parse(el, argc, (const char **)argv)); 492 } 493 494 #else 495 #include "error.h" 496 497 int 498 histcmd(int argc, char **argv) 499 { 500 501 error("not compiled with history support"); 502 /*NOTREACHED*/ 503 return (0); 504 } 505 506 int 507 bindcmd(int argc, char **argv) 508 { 509 510 error("not compiled with line editing support"); 511 return (0); 512 } 513 #endif 514