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 } else { 123 bad: 124 out2fmt_flush("sh: can't initialize editing\n"); 125 } 126 INTON; 127 } else if (!editing && el) { 128 INTOFF; 129 el_end(el); 130 el = NULL; 131 INTON; 132 } 133 if (el) { 134 if (Vflag) 135 el_set(el, EL_EDITOR, "vi"); 136 else if (Eflag) 137 el_set(el, EL_EDITOR, "emacs"); 138 el_source(el, NULL); 139 } 140 } else { 141 INTOFF; 142 if (el) { /* no editing if not interactive */ 143 el_end(el); 144 el = NULL; 145 } 146 if (hist) { 147 history_end(hist); 148 hist = NULL; 149 } 150 INTON; 151 } 152 } 153 154 155 void 156 sethistsize(hs) 157 const char *hs; 158 { 159 int histsize; 160 HistEvent he; 161 162 if (hist != NULL) { 163 if (hs == NULL || *hs == '\0' || 164 (histsize = atoi(hs)) < 0) 165 histsize = 100; 166 history(hist, &he, H_SETSIZE, histsize); 167 } 168 } 169 170 void 171 setterm(const char *term) 172 { 173 if (rootshell && el != NULL && term != NULL) 174 el_set(el, EL_TERMINAL, term); 175 } 176 177 int 178 histcmd(int argc, char **argv) 179 { 180 int ch; 181 const char *editor = NULL; 182 HistEvent he; 183 int lflg = 0, nflg = 0, rflg = 0, sflg = 0; 184 int i, retval; 185 const char *firststr, *laststr; 186 int first, last, direction; 187 char *pat = NULL, *repl = NULL; 188 static int active = 0; 189 struct jmploc jmploc; 190 struct jmploc *savehandler; 191 char editfilestr[PATH_MAX]; 192 char *volatile editfile; 193 FILE *efp = NULL; 194 int oldhistnum; 195 196 if (hist == NULL) 197 error("history not active"); 198 199 if (argc == 1) 200 error("missing history argument"); 201 202 optreset = 1; optind = 1; /* initialize getopt */ 203 opterr = 0; 204 while (not_fcnumber(argv[optind]) && 205 (ch = getopt(argc, argv, ":e:lnrs")) != -1) 206 switch ((char)ch) { 207 case 'e': 208 editor = optarg; 209 break; 210 case 'l': 211 lflg = 1; 212 break; 213 case 'n': 214 nflg = 1; 215 break; 216 case 'r': 217 rflg = 1; 218 break; 219 case 's': 220 sflg = 1; 221 break; 222 case ':': 223 error("option -%c expects argument", optopt); 224 case '?': 225 default: 226 error("unknown option: -%c", optopt); 227 } 228 argc -= optind, argv += optind; 229 230 /* 231 * If executing... 232 */ 233 if (lflg == 0 || editor || sflg) { 234 lflg = 0; /* ignore */ 235 editfile = NULL; 236 /* 237 * Catch interrupts to reset active counter and 238 * cleanup temp files. 239 */ 240 savehandler = handler; 241 if (setjmp(jmploc.loc)) { 242 active = 0; 243 if (editfile) 244 unlink(editfile); 245 handler = savehandler; 246 longjmp(handler->loc, 1); 247 } 248 handler = &jmploc; 249 if (++active > MAXHISTLOOPS) { 250 active = 0; 251 displayhist = 0; 252 error("called recursively too many times"); 253 } 254 /* 255 * Set editor. 256 */ 257 if (sflg == 0) { 258 if (editor == NULL && 259 (editor = bltinlookup("FCEDIT", 1)) == NULL && 260 (editor = bltinlookup("EDITOR", 1)) == NULL) 261 editor = DEFEDITOR; 262 if (editor[0] == '-' && editor[1] == '\0') { 263 sflg = 1; /* no edit */ 264 editor = NULL; 265 } 266 } 267 } 268 269 /* 270 * If executing, parse [old=new] now 271 */ 272 if (lflg == 0 && argc > 0 && 273 ((repl = strchr(argv[0], '=')) != NULL)) { 274 pat = argv[0]; 275 *repl++ = '\0'; 276 argc--, argv++; 277 } 278 /* 279 * determine [first] and [last] 280 */ 281 switch (argc) { 282 case 0: 283 firststr = lflg ? "-16" : "-1"; 284 laststr = "-1"; 285 break; 286 case 1: 287 firststr = argv[0]; 288 laststr = lflg ? "-1" : argv[0]; 289 break; 290 case 2: 291 firststr = argv[0]; 292 laststr = argv[1]; 293 break; 294 default: 295 error("too many args"); 296 } 297 /* 298 * Turn into event numbers. 299 */ 300 first = str_to_event(firststr, 0); 301 last = str_to_event(laststr, 1); 302 303 if (rflg) { 304 i = last; 305 last = first; 306 first = i; 307 } 308 /* 309 * XXX - this should not depend on the event numbers 310 * always increasing. Add sequence numbers or offset 311 * to the history element in next (diskbased) release. 312 */ 313 direction = first < last ? H_PREV : H_NEXT; 314 315 /* 316 * If editing, grab a temp file. 317 */ 318 if (editor) { 319 int fd; 320 INTOFF; /* easier */ 321 sprintf(editfilestr, "%s/_shXXXXXX", _PATH_TMP); 322 if ((fd = mkstemp(editfilestr)) < 0) 323 error("can't create temporary file %s", editfile); 324 editfile = editfilestr; 325 if ((efp = fdopen(fd, "w")) == NULL) { 326 close(fd); 327 error("can't allocate stdio buffer for temp"); 328 } 329 } 330 331 /* 332 * Loop through selected history events. If listing or executing, 333 * do it now. Otherwise, put into temp file and call the editor 334 * after. 335 * 336 * The history interface needs rethinking, as the following 337 * convolutions will demonstrate. 338 */ 339 history(hist, &he, H_FIRST); 340 retval = history(hist, &he, H_NEXT_EVENT, first); 341 for (;retval != -1; retval = history(hist, &he, direction)) { 342 if (lflg) { 343 if (!nflg) 344 out1fmt("%5d ", he.num); 345 out1str(he.str); 346 } else { 347 char *s = pat ? 348 fc_replace(he.str, pat, repl) : (char *)he.str; 349 350 if (sflg) { 351 if (displayhist) { 352 out2str(s); 353 flushout(out2); 354 } 355 evalstring(s, 0); 356 if (displayhist && hist) { 357 /* 358 * XXX what about recursive and 359 * relative histnums. 360 */ 361 oldhistnum = he.num; 362 history(hist, &he, H_ENTER, s); 363 /* 364 * XXX H_ENTER moves the internal 365 * cursor, set it back to the current 366 * entry. 367 */ 368 retval = history(hist, &he, 369 H_NEXT_EVENT, oldhistnum); 370 } 371 } else 372 fputs(s, efp); 373 } 374 /* 375 * At end? (if we were to lose last, we'd sure be 376 * messed up). 377 */ 378 if (he.num == last) 379 break; 380 } 381 if (editor) { 382 char *editcmd; 383 384 fclose(efp); 385 editcmd = stalloc(strlen(editor) + strlen(editfile) + 2); 386 sprintf(editcmd, "%s %s", editor, editfile); 387 evalstring(editcmd, 0); /* XXX - should use no JC command */ 388 INTON; 389 readcmdfile(editfile); /* XXX - should read back - quick tst */ 390 unlink(editfile); 391 } 392 393 if (lflg == 0 && active > 0) 394 --active; 395 if (displayhist) 396 displayhist = 0; 397 return 0; 398 } 399 400 STATIC char * 401 fc_replace(const char *s, char *p, char *r) 402 { 403 char *dest; 404 int plen = strlen(p); 405 406 STARTSTACKSTR(dest); 407 while (*s) { 408 if (*s == *p && strncmp(s, p, plen) == 0) { 409 while (*r) 410 STPUTC(*r++, dest); 411 s += plen; 412 *p = '\0'; /* so no more matches */ 413 } else 414 STPUTC(*s++, dest); 415 } 416 STACKSTRNUL(dest); 417 dest = grabstackstr(dest); 418 419 return (dest); 420 } 421 422 int 423 not_fcnumber(const char *s) 424 { 425 if (s == NULL) 426 return (0); 427 if (*s == '-') 428 s++; 429 return (!is_number(s)); 430 } 431 432 int 433 str_to_event(const char *str, int last) 434 { 435 HistEvent he; 436 const char *s = str; 437 int relative = 0; 438 int i, retval; 439 440 retval = history(hist, &he, H_FIRST); 441 switch (*s) { 442 case '-': 443 relative = 1; 444 /*FALLTHROUGH*/ 445 case '+': 446 s++; 447 } 448 if (is_number(s)) { 449 i = atoi(s); 450 if (relative) { 451 while (retval != -1 && i--) { 452 retval = history(hist, &he, H_NEXT); 453 } 454 if (retval == -1) 455 retval = history(hist, &he, H_LAST); 456 } else { 457 retval = history(hist, &he, H_NEXT_EVENT, i); 458 if (retval == -1) { 459 /* 460 * the notion of first and last is 461 * backwards to that of the history package 462 */ 463 retval = history(hist, &he, last ? H_FIRST : H_LAST); 464 } 465 } 466 if (retval == -1) 467 error("history number %s not found (internal error)", 468 str); 469 } else { 470 /* 471 * pattern 472 */ 473 retval = history(hist, &he, H_PREV_STR, str); 474 if (retval == -1) 475 error("history pattern not found: %s", str); 476 } 477 return (he.num); 478 } 479 480 int 481 bindcmd(int argc, char **argv) 482 { 483 484 if (el == NULL) 485 error("line editing is disabled"); 486 return (el_parse(el, argc, (const char **)argv)); 487 } 488 489 #else 490 #include "error.h" 491 492 int 493 histcmd(int argc, char **argv) 494 { 495 496 error("not compiled with history support"); 497 /*NOTREACHED*/ 498 return (0); 499 } 500 501 int 502 bindcmd(int argc, char **argv) 503 { 504 505 error("not compiled with line editing support"); 506 return (0); 507 } 508 #endif 509