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 __unused) 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 while (not_fcnumber(*argptr) && (ch = nextopt("e:lnrs")) != '\0') 210 switch ((char)ch) { 211 case 'e': 212 editor = shoptarg; 213 break; 214 case 'l': 215 lflg = 1; 216 break; 217 case 'n': 218 nflg = 1; 219 break; 220 case 'r': 221 rflg = 1; 222 break; 223 case 's': 224 sflg = 1; 225 break; 226 } 227 228 savehandler = handler; 229 /* 230 * If executing... 231 */ 232 if (lflg == 0 || editor || sflg) { 233 lflg = 0; /* ignore */ 234 editfile = NULL; 235 /* 236 * Catch interrupts to reset active counter and 237 * cleanup temp files. 238 */ 239 if (setjmp(jmploc.loc)) { 240 active = 0; 241 if (editfile) 242 unlink(editfile); 243 handler = savehandler; 244 longjmp(handler->loc, 1); 245 } 246 handler = &jmploc; 247 if (++active > MAXHISTLOOPS) { 248 active = 0; 249 displayhist = 0; 250 error("called recursively too many times"); 251 } 252 /* 253 * Set editor. 254 */ 255 if (sflg == 0) { 256 if (editor == NULL && 257 (editor = bltinlookup("FCEDIT", 1)) == NULL && 258 (editor = bltinlookup("EDITOR", 1)) == NULL) 259 editor = DEFEDITOR; 260 if (editor[0] == '-' && editor[1] == '\0') { 261 sflg = 1; /* no edit */ 262 editor = NULL; 263 } 264 } 265 } 266 267 /* 268 * If executing, parse [old=new] now 269 */ 270 if (lflg == 0 && *argptr != NULL && 271 ((repl = strchr(*argptr, '=')) != NULL)) { 272 pat = *argptr; 273 *repl++ = '\0'; 274 argptr++; 275 } 276 /* 277 * determine [first] and [last] 278 */ 279 if (*argptr == NULL) { 280 firststr = lflg ? "-16" : "-1"; 281 laststr = "-1"; 282 } else if (argptr[1] == NULL) { 283 firststr = argptr[0]; 284 laststr = lflg ? "-1" : argptr[0]; 285 } else if (argptr[2] == NULL) { 286 firststr = argptr[0]; 287 laststr = argptr[1]; 288 } else 289 error("too many arguments"); 290 /* 291 * Turn into event numbers. 292 */ 293 first = str_to_event(firststr, 0); 294 last = str_to_event(laststr, 1); 295 296 if (rflg) { 297 i = last; 298 last = first; 299 first = i; 300 } 301 /* 302 * XXX - this should not depend on the event numbers 303 * always increasing. Add sequence numbers or offset 304 * to the history element in next (diskbased) release. 305 */ 306 direction = first < last ? H_PREV : H_NEXT; 307 308 /* 309 * If editing, grab a temp file. 310 */ 311 if (editor) { 312 int fd; 313 INTOFF; /* easier */ 314 sprintf(editfilestr, "%s/_shXXXXXX", _PATH_TMP); 315 if ((fd = mkstemp(editfilestr)) < 0) 316 error("can't create temporary file %s", editfile); 317 editfile = editfilestr; 318 if ((efp = fdopen(fd, "w")) == NULL) { 319 close(fd); 320 error("Out of space"); 321 } 322 } 323 324 /* 325 * Loop through selected history events. If listing or executing, 326 * do it now. Otherwise, put into temp file and call the editor 327 * after. 328 * 329 * The history interface needs rethinking, as the following 330 * convolutions will demonstrate. 331 */ 332 history(hist, &he, H_FIRST); 333 retval = history(hist, &he, H_NEXT_EVENT, first); 334 for (;retval != -1; retval = history(hist, &he, direction)) { 335 if (lflg) { 336 if (!nflg) 337 out1fmt("%5d ", he.num); 338 out1str(he.str); 339 } else { 340 char *s = pat ? 341 fc_replace(he.str, pat, repl) : (char *)he.str; 342 343 if (sflg) { 344 if (displayhist) { 345 out2str(s); 346 flushout(out2); 347 } 348 evalstring(s, 0); 349 if (displayhist && hist) { 350 /* 351 * XXX what about recursive and 352 * relative histnums. 353 */ 354 oldhistnum = he.num; 355 history(hist, &he, H_ENTER, s); 356 /* 357 * XXX H_ENTER moves the internal 358 * cursor, set it back to the current 359 * entry. 360 */ 361 retval = history(hist, &he, 362 H_NEXT_EVENT, oldhistnum); 363 } 364 } else 365 fputs(s, efp); 366 } 367 /* 368 * At end? (if we were to lose last, we'd sure be 369 * messed up). 370 */ 371 if (he.num == last) 372 break; 373 } 374 if (editor) { 375 char *editcmd; 376 377 fclose(efp); 378 editcmd = stalloc(strlen(editor) + strlen(editfile) + 2); 379 sprintf(editcmd, "%s %s", editor, editfile); 380 evalstring(editcmd, 0); /* XXX - should use no JC command */ 381 INTON; 382 readcmdfile(editfile); /* XXX - should read back - quick tst */ 383 unlink(editfile); 384 } 385 386 if (lflg == 0 && active > 0) 387 --active; 388 if (displayhist) 389 displayhist = 0; 390 handler = savehandler; 391 return 0; 392 } 393 394 static char * 395 fc_replace(const char *s, char *p, char *r) 396 { 397 char *dest; 398 int plen = strlen(p); 399 400 STARTSTACKSTR(dest); 401 while (*s) { 402 if (*s == *p && strncmp(s, p, plen) == 0) { 403 STPUTS(r, dest); 404 s += plen; 405 *p = '\0'; /* so no more matches */ 406 } else 407 STPUTC(*s++, dest); 408 } 409 STPUTC('\0', dest); 410 dest = grabstackstr(dest); 411 412 return (dest); 413 } 414 415 static int 416 not_fcnumber(const char *s) 417 { 418 if (s == NULL) 419 return (0); 420 if (*s == '-') 421 s++; 422 return (!is_number(s)); 423 } 424 425 static int 426 str_to_event(const char *str, int last) 427 { 428 HistEvent he; 429 const char *s = str; 430 int relative = 0; 431 int i, retval; 432 433 retval = history(hist, &he, H_FIRST); 434 switch (*s) { 435 case '-': 436 relative = 1; 437 /*FALLTHROUGH*/ 438 case '+': 439 s++; 440 } 441 if (is_number(s)) { 442 i = atoi(s); 443 if (relative) { 444 while (retval != -1 && i--) { 445 retval = history(hist, &he, H_NEXT); 446 } 447 if (retval == -1) 448 retval = history(hist, &he, H_LAST); 449 } else { 450 retval = history(hist, &he, H_NEXT_EVENT, i); 451 if (retval == -1) { 452 /* 453 * the notion of first and last is 454 * backwards to that of the history package 455 */ 456 retval = history(hist, &he, last ? H_FIRST : H_LAST); 457 } 458 } 459 if (retval == -1) 460 error("history number %s not found (internal error)", 461 str); 462 } else { 463 /* 464 * pattern 465 */ 466 retval = history(hist, &he, H_PREV_STR, str); 467 if (retval == -1) 468 error("history pattern not found: %s", str); 469 } 470 return (he.num); 471 } 472 473 int 474 bindcmd(int argc, char **argv) 475 { 476 477 if (el == NULL) 478 error("line editing is disabled"); 479 return (el_parse(el, argc, (const char **)argv)); 480 } 481 482 #else 483 #include "error.h" 484 485 int 486 histcmd(int argc, char **argv) 487 { 488 489 error("not compiled with history support"); 490 /*NOTREACHED*/ 491 return (0); 492 } 493 494 int 495 bindcmd(int argc, char **argv) 496 { 497 498 error("not compiled with line editing support"); 499 return (0); 500 } 501 #endif 502