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 #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_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 || !is_number(hs)) 170 histsize = 100; 171 else 172 histsize = atoi(hs); 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 __unused) 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 while (not_fcnumber(*argptr) && (ch = nextopt("e:lnrs")) != '\0') 211 switch ((char)ch) { 212 case 'e': 213 editor = shoptarg; 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 } 228 229 savehandler = handler; 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 if (setjmp(jmploc.loc)) { 241 active = 0; 242 if (editfile) 243 unlink(editfile); 244 handler = savehandler; 245 longjmp(handler->loc, 1); 246 } 247 handler = &jmploc; 248 if (++active > MAXHISTLOOPS) { 249 active = 0; 250 displayhist = 0; 251 error("called recursively too many times"); 252 } 253 /* 254 * Set editor. 255 */ 256 if (sflg == 0) { 257 if (editor == NULL && 258 (editor = bltinlookup("FCEDIT", 1)) == NULL && 259 (editor = bltinlookup("EDITOR", 1)) == NULL) 260 editor = DEFEDITOR; 261 if (editor[0] == '-' && editor[1] == '\0') { 262 sflg = 1; /* no edit */ 263 editor = NULL; 264 } 265 } 266 } 267 268 /* 269 * If executing, parse [old=new] now 270 */ 271 if (lflg == 0 && *argptr != NULL && 272 ((repl = strchr(*argptr, '=')) != NULL)) { 273 pat = *argptr; 274 *repl++ = '\0'; 275 argptr++; 276 } 277 /* 278 * determine [first] and [last] 279 */ 280 if (*argptr == NULL) { 281 firststr = lflg ? "-16" : "-1"; 282 laststr = "-1"; 283 } else if (argptr[1] == NULL) { 284 firststr = argptr[0]; 285 laststr = lflg ? "-1" : argptr[0]; 286 } else if (argptr[2] == NULL) { 287 firststr = argptr[0]; 288 laststr = argptr[1]; 289 } else 290 error("too many arguments"); 291 /* 292 * Turn into event numbers. 293 */ 294 first = str_to_event(firststr, 0); 295 last = str_to_event(laststr, 1); 296 297 if (rflg) { 298 i = last; 299 last = first; 300 first = i; 301 } 302 /* 303 * XXX - this should not depend on the event numbers 304 * always increasing. Add sequence numbers or offset 305 * to the history element in next (diskbased) release. 306 */ 307 direction = first < last ? H_PREV : H_NEXT; 308 309 /* 310 * If editing, grab a temp file. 311 */ 312 if (editor) { 313 int fd; 314 INTOFF; /* easier */ 315 sprintf(editfilestr, "%s/_shXXXXXX", _PATH_TMP); 316 if ((fd = mkstemp(editfilestr)) < 0) 317 error("can't create temporary file %s", editfile); 318 editfile = editfilestr; 319 if ((efp = fdopen(fd, "w")) == NULL) { 320 close(fd); 321 error("Out of space"); 322 } 323 } 324 325 /* 326 * Loop through selected history events. If listing or executing, 327 * do it now. Otherwise, put into temp file and call the editor 328 * after. 329 * 330 * The history interface needs rethinking, as the following 331 * convolutions will demonstrate. 332 */ 333 history(hist, &he, H_FIRST); 334 retval = history(hist, &he, H_NEXT_EVENT, first); 335 for (;retval != -1; retval = history(hist, &he, direction)) { 336 if (lflg) { 337 if (!nflg) 338 out1fmt("%5d ", he.num); 339 out1str(he.str); 340 } else { 341 const char *s = pat ? 342 fc_replace(he.str, pat, repl) : he.str; 343 344 if (sflg) { 345 if (displayhist) { 346 out2str(s); 347 flushout(out2); 348 } 349 evalstring(s, 0); 350 if (displayhist && hist) { 351 /* 352 * XXX what about recursive and 353 * relative histnums. 354 */ 355 oldhistnum = he.num; 356 history(hist, &he, H_ENTER, s); 357 /* 358 * XXX H_ENTER moves the internal 359 * cursor, set it back to the current 360 * entry. 361 */ 362 retval = history(hist, &he, 363 H_NEXT_EVENT, oldhistnum); 364 } 365 } else 366 fputs(s, efp); 367 } 368 /* 369 * At end? (if we were to lose last, we'd sure be 370 * messed up). 371 */ 372 if (he.num == last) 373 break; 374 } 375 if (editor) { 376 char *editcmd; 377 378 fclose(efp); 379 editcmd = stalloc(strlen(editor) + strlen(editfile) + 2); 380 sprintf(editcmd, "%s %s", editor, editfile); 381 evalstring(editcmd, 0); /* XXX - should use no JC command */ 382 INTON; 383 readcmdfile(editfile); /* XXX - should read back - quick tst */ 384 unlink(editfile); 385 } 386 387 if (lflg == 0 && active > 0) 388 --active; 389 if (displayhist) 390 displayhist = 0; 391 handler = savehandler; 392 return 0; 393 } 394 395 static char * 396 fc_replace(const char *s, char *p, char *r) 397 { 398 char *dest; 399 int plen = strlen(p); 400 401 STARTSTACKSTR(dest); 402 while (*s) { 403 if (*s == *p && strncmp(s, p, plen) == 0) { 404 STPUTS(r, dest); 405 s += plen; 406 *p = '\0'; /* so no more matches */ 407 } else 408 STPUTC(*s++, dest); 409 } 410 STPUTC('\0', dest); 411 dest = grabstackstr(dest); 412 413 return (dest); 414 } 415 416 static int 417 not_fcnumber(const char *s) 418 { 419 if (s == NULL) 420 return (0); 421 if (*s == '-') 422 s++; 423 return (!is_number(s)); 424 } 425 426 static int 427 str_to_event(const char *str, int last) 428 { 429 HistEvent he; 430 const char *s = str; 431 int relative = 0; 432 int i, retval; 433 434 retval = history(hist, &he, H_FIRST); 435 switch (*s) { 436 case '-': 437 relative = 1; 438 /*FALLTHROUGH*/ 439 case '+': 440 s++; 441 } 442 if (is_number(s)) { 443 i = atoi(s); 444 if (relative) { 445 while (retval != -1 && i--) { 446 retval = history(hist, &he, H_NEXT); 447 } 448 if (retval == -1) 449 retval = history(hist, &he, H_LAST); 450 } else { 451 retval = history(hist, &he, H_NEXT_EVENT, i); 452 if (retval == -1) { 453 /* 454 * the notion of first and last is 455 * backwards to that of the history package 456 */ 457 retval = history(hist, &he, last ? H_FIRST : H_LAST); 458 } 459 } 460 if (retval == -1) 461 error("history number %s not found (internal error)", 462 str); 463 } else { 464 /* 465 * pattern 466 */ 467 retval = history(hist, &he, H_PREV_STR, str); 468 if (retval == -1) 469 error("history pattern not found: %s", str); 470 } 471 return (he.num); 472 } 473 474 int 475 bindcmd(int argc, char **argv) 476 { 477 478 if (el == NULL) 479 error("line editing is disabled"); 480 return (el_parse(el, argc, __DECONST(const char **, argv))); 481 } 482 483 #else 484 #include "error.h" 485 486 int 487 histcmd(int argc, char **argv) 488 { 489 490 error("not compiled with history support"); 491 /*NOTREACHED*/ 492 return (0); 493 } 494 495 int 496 bindcmd(int argc, char **argv) 497 { 498 499 error("not compiled with line editing support"); 500 return (0); 501 } 502 #endif 503