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. 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 #endif 60 #include "error.h" 61 #include "eval.h" 62 #include "memalloc.h" 63 #include "builtins.h" 64 65 #ifndef NO_HISTORY 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 static int not_fcnumber(const char *); 77 static int str_to_event(const char *, int); 78 79 /* 80 * Set history and editing status. Called whenever the status may 81 * have changed (figures out what to do). 82 */ 83 void 84 histedit(void) 85 { 86 87 #define editing (Eflag || Vflag) 88 89 if (iflag) { 90 if (!hist) { 91 /* 92 * turn history on 93 */ 94 INTOFF; 95 hist = history_init(); 96 INTON; 97 98 if (hist != NULL) 99 sethistsize(histsizeval()); 100 else 101 out2fmt_flush("sh: can't initialize history\n"); 102 } 103 if (editing && !el && isatty(0)) { /* && isatty(2) ??? */ 104 /* 105 * turn editing on 106 */ 107 char *term; 108 109 INTOFF; 110 if (el_in == NULL) 111 el_in = fdopen(0, "r"); 112 if (el_err == NULL) 113 el_err = fdopen(1, "w"); 114 if (el_out == NULL) 115 el_out = fdopen(2, "w"); 116 if (el_in == NULL || el_err == NULL || el_out == NULL) 117 goto bad; 118 term = lookupvar("TERM"); 119 if (term) 120 setenv("TERM", term, 1); 121 else 122 unsetenv("TERM"); 123 el = el_init(arg0, el_in, el_out, el_err); 124 if (el != NULL) { 125 if (hist) 126 el_set(el, EL_HIST, history, hist); 127 el_set(el, EL_PROMPT, getprompt); 128 el_set(el, EL_ADDFN, "sh-complete", 129 "Filename completion", 130 _el_fn_complete); 131 } else { 132 bad: 133 out2fmt_flush("sh: can't initialize editing\n"); 134 } 135 INTON; 136 } else if (!editing && el) { 137 INTOFF; 138 el_end(el); 139 el = NULL; 140 INTON; 141 } 142 if (el) { 143 if (Vflag) 144 el_set(el, EL_EDITOR, "vi"); 145 else if (Eflag) 146 el_set(el, EL_EDITOR, "emacs"); 147 el_set(el, EL_BIND, "^I", "sh-complete", NULL); 148 el_source(el, NULL); 149 } 150 } else { 151 INTOFF; 152 if (el) { /* no editing if not interactive */ 153 el_end(el); 154 el = NULL; 155 } 156 if (hist) { 157 history_end(hist); 158 hist = NULL; 159 } 160 INTON; 161 } 162 } 163 164 165 void 166 sethistsize(const char *hs) 167 { 168 int histsize; 169 HistEvent he; 170 171 if (hist != NULL) { 172 if (hs == NULL || !is_number(hs)) 173 histsize = 100; 174 else 175 histsize = atoi(hs); 176 history(hist, &he, H_SETSIZE, histsize); 177 history(hist, &he, H_SETUNIQUE, 1); 178 } 179 } 180 181 void 182 setterm(const char *term) 183 { 184 if (rootshell && el != NULL && term != NULL) 185 el_set(el, EL_TERMINAL, term); 186 } 187 188 int 189 histcmd(int argc, char **argv __unused) 190 { 191 int ch; 192 const char *editor = NULL; 193 HistEvent he; 194 int lflg = 0, nflg = 0, rflg = 0, sflg = 0; 195 int i, retval; 196 const char *firststr, *laststr; 197 int first, last, direction; 198 char *pat = NULL, *repl = NULL; 199 static int active = 0; 200 struct jmploc jmploc; 201 struct jmploc *savehandler; 202 char editfilestr[PATH_MAX]; 203 char *volatile editfile; 204 FILE *efp = NULL; 205 int oldhistnum; 206 207 if (hist == NULL) 208 error("history not active"); 209 210 if (argc == 1) 211 error("missing history argument"); 212 213 while (not_fcnumber(*argptr) && (ch = nextopt("e:lnrs")) != '\0') 214 switch ((char)ch) { 215 case 'e': 216 editor = shoptarg; 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 } 231 232 savehandler = handler; 233 /* 234 * If executing... 235 */ 236 if (lflg == 0 || editor || sflg) { 237 lflg = 0; /* ignore */ 238 editfile = NULL; 239 /* 240 * Catch interrupts to reset active counter and 241 * cleanup temp files. 242 */ 243 if (setjmp(jmploc.loc)) { 244 active = 0; 245 if (editfile) 246 unlink(editfile); 247 handler = savehandler; 248 longjmp(handler->loc, 1); 249 } 250 handler = &jmploc; 251 if (++active > MAXHISTLOOPS) { 252 active = 0; 253 displayhist = 0; 254 error("called recursively too many times"); 255 } 256 /* 257 * Set editor. 258 */ 259 if (sflg == 0) { 260 if (editor == NULL && 261 (editor = bltinlookup("FCEDIT", 1)) == NULL && 262 (editor = bltinlookup("EDITOR", 1)) == NULL) 263 editor = DEFEDITOR; 264 if (editor[0] == '-' && editor[1] == '\0') { 265 sflg = 1; /* no edit */ 266 editor = NULL; 267 } 268 } 269 } 270 271 /* 272 * If executing, parse [old=new] now 273 */ 274 if (lflg == 0 && *argptr != NULL && 275 ((repl = strchr(*argptr, '=')) != NULL)) { 276 pat = *argptr; 277 *repl++ = '\0'; 278 argptr++; 279 } 280 /* 281 * determine [first] and [last] 282 */ 283 if (*argptr == NULL) { 284 firststr = lflg ? "-16" : "-1"; 285 laststr = "-1"; 286 } else if (argptr[1] == NULL) { 287 firststr = argptr[0]; 288 laststr = lflg ? "-1" : argptr[0]; 289 } else if (argptr[2] == NULL) { 290 firststr = argptr[0]; 291 laststr = argptr[1]; 292 } else 293 error("too many arguments"); 294 /* 295 * Turn into event numbers. 296 */ 297 first = str_to_event(firststr, 0); 298 last = str_to_event(laststr, 1); 299 300 if (rflg) { 301 i = last; 302 last = first; 303 first = i; 304 } 305 /* 306 * XXX - this should not depend on the event numbers 307 * always increasing. Add sequence numbers or offset 308 * to the history element in next (diskbased) release. 309 */ 310 direction = first < last ? H_PREV : H_NEXT; 311 312 /* 313 * If editing, grab a temp file. 314 */ 315 if (editor) { 316 int fd; 317 INTOFF; /* easier */ 318 sprintf(editfilestr, "%s/_shXXXXXX", _PATH_TMP); 319 if ((fd = mkstemp(editfilestr)) < 0) 320 error("can't create temporary file %s", editfile); 321 editfile = editfilestr; 322 if ((efp = fdopen(fd, "w")) == NULL) { 323 close(fd); 324 error("Out of space"); 325 } 326 } 327 328 /* 329 * Loop through selected history events. If listing or executing, 330 * do it now. Otherwise, put into temp file and call the editor 331 * after. 332 * 333 * The history interface needs rethinking, as the following 334 * convolutions will demonstrate. 335 */ 336 history(hist, &he, H_FIRST); 337 retval = history(hist, &he, H_NEXT_EVENT, first); 338 for (;retval != -1; retval = history(hist, &he, direction)) { 339 if (lflg) { 340 if (!nflg) 341 out1fmt("%5d ", he.num); 342 out1str(he.str); 343 } else { 344 const char *s = pat ? 345 fc_replace(he.str, pat, repl) : he.str; 346 347 if (sflg) { 348 if (displayhist) { 349 out2str(s); 350 flushout(out2); 351 } 352 evalstring(s, 0); 353 if (displayhist && hist) { 354 /* 355 * XXX what about recursive and 356 * relative histnums. 357 */ 358 oldhistnum = he.num; 359 history(hist, &he, H_ENTER, s); 360 /* 361 * XXX H_ENTER moves the internal 362 * cursor, set it back to the current 363 * entry. 364 */ 365 retval = history(hist, &he, 366 H_NEXT_EVENT, oldhistnum); 367 } 368 } else 369 fputs(s, efp); 370 } 371 /* 372 * At end? (if we were to lose last, we'd sure be 373 * messed up). 374 */ 375 if (he.num == last) 376 break; 377 } 378 if (editor) { 379 char *editcmd; 380 381 fclose(efp); 382 editcmd = stalloc(strlen(editor) + strlen(editfile) + 2); 383 sprintf(editcmd, "%s %s", editor, editfile); 384 evalstring(editcmd, 0); /* XXX - should use no JC command */ 385 INTON; 386 readcmdfile(editfile); /* XXX - should read back - quick tst */ 387 unlink(editfile); 388 } 389 390 if (lflg == 0 && active > 0) 391 --active; 392 if (displayhist) 393 displayhist = 0; 394 handler = savehandler; 395 return 0; 396 } 397 398 static char * 399 fc_replace(const char *s, char *p, char *r) 400 { 401 char *dest; 402 int plen = strlen(p); 403 404 STARTSTACKSTR(dest); 405 while (*s) { 406 if (*s == *p && strncmp(s, p, plen) == 0) { 407 STPUTS(r, dest); 408 s += plen; 409 *p = '\0'; /* so no more matches */ 410 } else 411 STPUTC(*s++, dest); 412 } 413 STPUTC('\0', dest); 414 dest = grabstackstr(dest); 415 416 return (dest); 417 } 418 419 static int 420 not_fcnumber(const char *s) 421 { 422 if (s == NULL) 423 return (0); 424 if (*s == '-') 425 s++; 426 return (!is_number(s)); 427 } 428 429 static int 430 str_to_event(const char *str, int last) 431 { 432 HistEvent he; 433 const char *s = str; 434 int relative = 0; 435 int i, retval; 436 437 retval = history(hist, &he, H_FIRST); 438 switch (*s) { 439 case '-': 440 relative = 1; 441 /*FALLTHROUGH*/ 442 case '+': 443 s++; 444 } 445 if (is_number(s)) { 446 i = atoi(s); 447 if (relative) { 448 while (retval != -1 && i--) { 449 retval = history(hist, &he, H_NEXT); 450 } 451 if (retval == -1) 452 retval = history(hist, &he, H_LAST); 453 } else { 454 retval = history(hist, &he, H_NEXT_EVENT, i); 455 if (retval == -1) { 456 /* 457 * the notion of first and last is 458 * backwards to that of the history package 459 */ 460 retval = history(hist, &he, last ? H_FIRST : H_LAST); 461 } 462 } 463 if (retval == -1) 464 error("history number %s not found (internal error)", 465 str); 466 } else { 467 /* 468 * pattern 469 */ 470 retval = history(hist, &he, H_PREV_STR, str); 471 if (retval == -1) 472 error("history pattern not found: %s", str); 473 } 474 return (he.num); 475 } 476 477 int 478 bindcmd(int argc, char **argv) 479 { 480 481 if (el == NULL) 482 error("line editing is disabled"); 483 return (el_parse(el, argc, __DECONST(const char **, argv))); 484 } 485 486 #else 487 488 int 489 histcmd(int argc __unused, char **argv __unused) 490 { 491 492 error("not compiled with history support"); 493 /*NOTREACHED*/ 494 return (0); 495 } 496 497 int 498 bindcmd(int argc __unused, char **argv __unused) 499 { 500 501 error("not compiled with line editing support"); 502 return (0); 503 } 504 #endif 505