11556Srgrimes/*- 21556Srgrimes * Copyright (c) 1993 31556Srgrimes * The Regents of the University of California. All rights reserved. 41556Srgrimes * 51556Srgrimes * This code is derived from software contributed to Berkeley by 61556Srgrimes * Kenneth Almquist. 71556Srgrimes * 81556Srgrimes * Redistribution and use in source and binary forms, with or without 91556Srgrimes * modification, are permitted provided that the following conditions 101556Srgrimes * are met: 111556Srgrimes * 1. Redistributions of source code must retain the above copyright 121556Srgrimes * notice, this list of conditions and the following disclaimer. 131556Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141556Srgrimes * notice, this list of conditions and the following disclaimer in the 151556Srgrimes * documentation and/or other materials provided with the distribution. 161556Srgrimes * 4. Neither the name of the University nor the names of its contributors 171556Srgrimes * may be used to endorse or promote products derived from this software 181556Srgrimes * without specific prior written permission. 191556Srgrimes * 201556Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 211556Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 221556Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 231556Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 241556Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 251556Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 261556Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 271556Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 281556Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 291556Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 301556Srgrimes * SUCH DAMAGE. 311556Srgrimes */ 321556Srgrimes 331556Srgrimes#ifndef lint 3436150Scharnier#if 0 3536150Scharnierstatic char sccsid[] = "@(#)histedit.c 8.2 (Berkeley) 5/4/95"; 3636150Scharnier#endif 371556Srgrimes#endif /* not lint */ 3899110Sobrien#include <sys/cdefs.h> 3999110Sobrien__FBSDID("$FreeBSD$"); 401556Srgrimes 4117987Speter#include <sys/param.h> 4277463Simp#include <limits.h> 4317987Speter#include <paths.h> 4417987Speter#include <stdio.h> 4517987Speter#include <stdlib.h> 4617987Speter#include <unistd.h> 471556Srgrimes/* 481556Srgrimes * Editline and history functions (and glue). 491556Srgrimes */ 501556Srgrimes#include "shell.h" 511556Srgrimes#include "parser.h" 521556Srgrimes#include "var.h" 531556Srgrimes#include "options.h" 5417987Speter#include "main.h" 5517987Speter#include "output.h" 561556Srgrimes#include "mystring.h" 5717987Speter#ifndef NO_HISTORY 5817987Speter#include "myhistedit.h" 591556Srgrimes#include "error.h" 6017987Speter#include "eval.h" 611556Srgrimes#include "memalloc.h" 62223060Sjilles#include "builtins.h" 631556Srgrimes 641556Srgrimes#define MAXHISTLOOPS 4 /* max recursions through fc */ 651556Srgrimes#define DEFEDITOR "ed" /* default editor *should* be $EDITOR */ 661556Srgrimes 671556SrgrimesHistory *hist; /* history cookie */ 681556SrgrimesEditLine *el; /* editline cookie */ 691556Srgrimesint displayhist; 7084261Sobrienstatic FILE *el_in, *el_out, *el_err; 711556Srgrimes 72213811Sobrienstatic char *fc_replace(const char *, char *, char *); 73229220Sjillesstatic int not_fcnumber(const char *); 74229220Sjillesstatic int str_to_event(const char *, int); 751556Srgrimes 761556Srgrimes/* 771556Srgrimes * Set history and editing status. Called whenever the status may 781556Srgrimes * have changed (figures out what to do). 791556Srgrimes */ 8017987Spetervoid 8190111Simphistedit(void) 8217987Speter{ 831556Srgrimes 841556Srgrimes#define editing (Eflag || Vflag) 851556Srgrimes 861556Srgrimes if (iflag) { 871556Srgrimes if (!hist) { 881556Srgrimes /* 891556Srgrimes * turn history on 901556Srgrimes */ 911556Srgrimes INTOFF; 921556Srgrimes hist = history_init(); 931556Srgrimes INTON; 941556Srgrimes 951556Srgrimes if (hist != NULL) 9620425Ssteve sethistsize(histsizeval()); 971556Srgrimes else 98199629Sjilles out2fmt_flush("sh: can't initialize history\n"); 991556Srgrimes } 1001556Srgrimes if (editing && !el && isatty(0)) { /* && isatty(2) ??? */ 1011556Srgrimes /* 1021556Srgrimes * turn editing on 1031556Srgrimes */ 104208755Sjilles char *term; 105208755Sjilles 1061556Srgrimes INTOFF; 1071556Srgrimes if (el_in == NULL) 1081556Srgrimes el_in = fdopen(0, "r"); 10984261Sobrien if (el_err == NULL) 11084261Sobrien el_err = fdopen(1, "w"); 1111556Srgrimes if (el_out == NULL) 1121556Srgrimes el_out = fdopen(2, "w"); 11384261Sobrien if (el_in == NULL || el_err == NULL || el_out == NULL) 1141556Srgrimes goto bad; 115208755Sjilles term = lookupvar("TERM"); 116208755Sjilles if (term) 117208755Sjilles setenv("TERM", term, 1); 118208755Sjilles else 119208755Sjilles unsetenv("TERM"); 12084261Sobrien el = el_init(arg0, el_in, el_out, el_err); 1211556Srgrimes if (el != NULL) { 1221556Srgrimes if (hist) 1231556Srgrimes el_set(el, EL_HIST, history, hist); 1241556Srgrimes el_set(el, EL_PROMPT, getprompt); 125209221Sjilles el_set(el, EL_ADDFN, "sh-complete", 126209221Sjilles "Filename completion", 127209221Sjilles _el_fn_sh_complete); 1281556Srgrimes } else { 1291556Srgrimesbad: 130199629Sjilles out2fmt_flush("sh: can't initialize editing\n"); 1311556Srgrimes } 1321556Srgrimes INTON; 1331556Srgrimes } else if (!editing && el) { 1341556Srgrimes INTOFF; 1351556Srgrimes el_end(el); 1361556Srgrimes el = NULL; 1371556Srgrimes INTON; 1381556Srgrimes } 1391556Srgrimes if (el) { 1401556Srgrimes if (Vflag) 1411556Srgrimes el_set(el, EL_EDITOR, "vi"); 1421556Srgrimes else if (Eflag) 1431556Srgrimes el_set(el, EL_EDITOR, "emacs"); 144209221Sjilles el_set(el, EL_BIND, "^I", "sh-complete", NULL); 145100568Stjr el_source(el, NULL); 1461556Srgrimes } 1471556Srgrimes } else { 1481556Srgrimes INTOFF; 1491556Srgrimes if (el) { /* no editing if not interactive */ 1501556Srgrimes el_end(el); 1511556Srgrimes el = NULL; 1521556Srgrimes } 1531556Srgrimes if (hist) { 1541556Srgrimes history_end(hist); 1551556Srgrimes hist = NULL; 1561556Srgrimes } 1571556Srgrimes INTON; 1581556Srgrimes } 1591556Srgrimes} 1601556Srgrimes 16117987Speter 16217987Spetervoid 163230530Scharniersethistsize(const char *hs) 16417987Speter{ 1651556Srgrimes int histsize; 16684261Sobrien HistEvent he; 1671556Srgrimes 1681556Srgrimes if (hist != NULL) { 16920425Ssteve if (hs == NULL || *hs == '\0' || 17020425Ssteve (histsize = atoi(hs)) < 0) 1711556Srgrimes histsize = 100; 172151471Sstefanf history(hist, &he, H_SETSIZE, histsize); 173210736Sjilles history(hist, &he, H_SETUNIQUE, 1); 1741556Srgrimes } 1751556Srgrimes} 1761556Srgrimes 177208755Sjillesvoid 178208755Sjillessetterm(const char *term) 179208755Sjilles{ 180208755Sjilles if (rootshell && el != NULL && term != NULL) 181208755Sjilles el_set(el, EL_TERMINAL, term); 182208755Sjilles} 183208755Sjilles 18417987Speterint 185240541Sjilleshistcmd(int argc, char **argv __unused) 1861556Srgrimes{ 1871556Srgrimes int ch; 188201053Sjilles const char *editor = NULL; 18984261Sobrien HistEvent he; 1901556Srgrimes int lflg = 0, nflg = 0, rflg = 0, sflg = 0; 19184261Sobrien int i, retval; 192201053Sjilles const char *firststr, *laststr; 1931556Srgrimes int first, last, direction; 194201053Sjilles char *pat = NULL, *repl = NULL; 1951556Srgrimes static int active = 0; 1961556Srgrimes struct jmploc jmploc; 197194765Sjilles struct jmploc *savehandler; 198194765Sjilles char editfilestr[PATH_MAX]; 199194765Sjilles char *volatile editfile; 200201053Sjilles FILE *efp = NULL; 20197730Stjr int oldhistnum; 2021556Srgrimes 2031556Srgrimes if (hist == NULL) 2041556Srgrimes error("history not active"); 2058855Srgrimes 2061556Srgrimes if (argc == 1) 2071556Srgrimes error("missing history argument"); 2081556Srgrimes 209240541Sjilles while (not_fcnumber(*argptr) && (ch = nextopt("e:lnrs")) != '\0') 2101556Srgrimes switch ((char)ch) { 2111556Srgrimes case 'e': 212240541Sjilles editor = shoptarg; 2131556Srgrimes break; 2141556Srgrimes case 'l': 2151556Srgrimes lflg = 1; 2161556Srgrimes break; 2171556Srgrimes case 'n': 2181556Srgrimes nflg = 1; 2191556Srgrimes break; 2201556Srgrimes case 'r': 2211556Srgrimes rflg = 1; 2221556Srgrimes break; 2231556Srgrimes case 's': 2241556Srgrimes sflg = 1; 2251556Srgrimes break; 2261556Srgrimes } 2271556Srgrimes 228216806Sjilles savehandler = handler; 2291556Srgrimes /* 2301556Srgrimes * If executing... 2311556Srgrimes */ 2321556Srgrimes if (lflg == 0 || editor || sflg) { 2331556Srgrimes lflg = 0; /* ignore */ 234194765Sjilles editfile = NULL; 2351556Srgrimes /* 2361556Srgrimes * Catch interrupts to reset active counter and 2371556Srgrimes * cleanup temp files. 2381556Srgrimes */ 2391556Srgrimes if (setjmp(jmploc.loc)) { 2401556Srgrimes active = 0; 241194765Sjilles if (editfile) 2421556Srgrimes unlink(editfile); 2431556Srgrimes handler = savehandler; 2441556Srgrimes longjmp(handler->loc, 1); 2451556Srgrimes } 2461556Srgrimes handler = &jmploc; 2471556Srgrimes if (++active > MAXHISTLOOPS) { 2481556Srgrimes active = 0; 2491556Srgrimes displayhist = 0; 2501556Srgrimes error("called recursively too many times"); 2511556Srgrimes } 2521556Srgrimes /* 2531556Srgrimes * Set editor. 2541556Srgrimes */ 2551556Srgrimes if (sflg == 0) { 2561556Srgrimes if (editor == NULL && 2571556Srgrimes (editor = bltinlookup("FCEDIT", 1)) == NULL && 2581556Srgrimes (editor = bltinlookup("EDITOR", 1)) == NULL) 2591556Srgrimes editor = DEFEDITOR; 2601556Srgrimes if (editor[0] == '-' && editor[1] == '\0') { 2611556Srgrimes sflg = 1; /* no edit */ 2621556Srgrimes editor = NULL; 2631556Srgrimes } 2641556Srgrimes } 2651556Srgrimes } 2661556Srgrimes 2671556Srgrimes /* 2681556Srgrimes * If executing, parse [old=new] now 2691556Srgrimes */ 270240541Sjilles if (lflg == 0 && *argptr != NULL && 271240541Sjilles ((repl = strchr(*argptr, '=')) != NULL)) { 272240541Sjilles pat = *argptr; 2731556Srgrimes *repl++ = '\0'; 274240541Sjilles argptr++; 2751556Srgrimes } 2761556Srgrimes /* 2771556Srgrimes * determine [first] and [last] 2781556Srgrimes */ 279240541Sjilles if (*argptr == NULL) { 2801556Srgrimes firststr = lflg ? "-16" : "-1"; 2811556Srgrimes laststr = "-1"; 282240541Sjilles } else if (argptr[1] == NULL) { 283240541Sjilles firststr = argptr[0]; 284240541Sjilles laststr = lflg ? "-1" : argptr[0]; 285240541Sjilles } else if (argptr[2] == NULL) { 286240541Sjilles firststr = argptr[0]; 287240541Sjilles laststr = argptr[1]; 288240541Sjilles } else 289214538Sjilles error("too many arguments"); 2901556Srgrimes /* 2911556Srgrimes * Turn into event numbers. 2921556Srgrimes */ 2931556Srgrimes first = str_to_event(firststr, 0); 2941556Srgrimes last = str_to_event(laststr, 1); 2951556Srgrimes 2961556Srgrimes if (rflg) { 2971556Srgrimes i = last; 2981556Srgrimes last = first; 2991556Srgrimes first = i; 3001556Srgrimes } 3011556Srgrimes /* 3021556Srgrimes * XXX - this should not depend on the event numbers 3038855Srgrimes * always increasing. Add sequence numbers or offset 3041556Srgrimes * to the history element in next (diskbased) release. 3051556Srgrimes */ 3061556Srgrimes direction = first < last ? H_PREV : H_NEXT; 3071556Srgrimes 3081556Srgrimes /* 3091556Srgrimes * If editing, grab a temp file. 3101556Srgrimes */ 3111556Srgrimes if (editor) { 3121556Srgrimes int fd; 3131556Srgrimes INTOFF; /* easier */ 314194765Sjilles sprintf(editfilestr, "%s/_shXXXXXX", _PATH_TMP); 315194765Sjilles if ((fd = mkstemp(editfilestr)) < 0) 3161556Srgrimes error("can't create temporary file %s", editfile); 317194765Sjilles editfile = editfilestr; 3181556Srgrimes if ((efp = fdopen(fd, "w")) == NULL) { 3191556Srgrimes close(fd); 320214538Sjilles error("Out of space"); 3211556Srgrimes } 3221556Srgrimes } 3231556Srgrimes 3241556Srgrimes /* 3251556Srgrimes * Loop through selected history events. If listing or executing, 3261556Srgrimes * do it now. Otherwise, put into temp file and call the editor 3271556Srgrimes * after. 3281556Srgrimes * 3291556Srgrimes * The history interface needs rethinking, as the following 3301556Srgrimes * convolutions will demonstrate. 3311556Srgrimes */ 33284261Sobrien history(hist, &he, H_FIRST); 33384261Sobrien retval = history(hist, &he, H_NEXT_EVENT, first); 33484261Sobrien for (;retval != -1; retval = history(hist, &he, direction)) { 3351556Srgrimes if (lflg) { 3361556Srgrimes if (!nflg) 33784261Sobrien out1fmt("%5d ", he.num); 33884261Sobrien out1str(he.str); 3391556Srgrimes } else { 3408855Srgrimes char *s = pat ? 34184261Sobrien fc_replace(he.str, pat, repl) : (char *)he.str; 3421556Srgrimes 3431556Srgrimes if (sflg) { 3441556Srgrimes if (displayhist) { 3451556Srgrimes out2str(s); 346199629Sjilles flushout(out2); 3471556Srgrimes } 348193169Sstefanf evalstring(s, 0); 3491556Srgrimes if (displayhist && hist) { 3501556Srgrimes /* 3518855Srgrimes * XXX what about recursive and 3521556Srgrimes * relative histnums. 3531556Srgrimes */ 35497730Stjr oldhistnum = he.num; 35584261Sobrien history(hist, &he, H_ENTER, s); 35697730Stjr /* 35797730Stjr * XXX H_ENTER moves the internal 35897730Stjr * cursor, set it back to the current 35997730Stjr * entry. 36097730Stjr */ 36197730Stjr retval = history(hist, &he, 36297730Stjr H_NEXT_EVENT, oldhistnum); 3631556Srgrimes } 3641556Srgrimes } else 3651556Srgrimes fputs(s, efp); 3661556Srgrimes } 3671556Srgrimes /* 368160964Syar * At end? (if we were to lose last, we'd sure be 3691556Srgrimes * messed up). 3701556Srgrimes */ 37184261Sobrien if (he.num == last) 3721556Srgrimes break; 3731556Srgrimes } 3741556Srgrimes if (editor) { 3751556Srgrimes char *editcmd; 3761556Srgrimes 3771556Srgrimes fclose(efp); 3781556Srgrimes editcmd = stalloc(strlen(editor) + strlen(editfile) + 2); 3791556Srgrimes sprintf(editcmd, "%s %s", editor, editfile); 380193169Sstefanf evalstring(editcmd, 0); /* XXX - should use no JC command */ 3811556Srgrimes INTON; 3821556Srgrimes readcmdfile(editfile); /* XXX - should read back - quick tst */ 3831556Srgrimes unlink(editfile); 3841556Srgrimes } 3858855Srgrimes 3861556Srgrimes if (lflg == 0 && active > 0) 3871556Srgrimes --active; 3881556Srgrimes if (displayhist) 3891556Srgrimes displayhist = 0; 390216806Sjilles handler = savehandler; 39117987Speter return 0; 3921556Srgrimes} 3931556Srgrimes 394213811Sobrienstatic char * 39590111Simpfc_replace(const char *s, char *p, char *r) 3961556Srgrimes{ 3971556Srgrimes char *dest; 3981556Srgrimes int plen = strlen(p); 3991556Srgrimes 4001556Srgrimes STARTSTACKSTR(dest); 4011556Srgrimes while (*s) { 4021556Srgrimes if (*s == *p && strncmp(s, p, plen) == 0) { 403215783Sjilles STPUTS(r, dest); 4041556Srgrimes s += plen; 4051556Srgrimes *p = '\0'; /* so no more matches */ 4061556Srgrimes } else 4071556Srgrimes STPUTC(*s++, dest); 4081556Srgrimes } 409213814Sobrien STPUTC('\0', dest); 4101556Srgrimes dest = grabstackstr(dest); 4111556Srgrimes 4121556Srgrimes return (dest); 4131556Srgrimes} 4141556Srgrimes 415229220Sjillesstatic int 416200956Sjillesnot_fcnumber(const char *s) 4171556Srgrimes{ 41820425Ssteve if (s == NULL) 41925224Ssteve return (0); 42020425Ssteve if (*s == '-') 42120425Ssteve s++; 4221556Srgrimes return (!is_number(s)); 4231556Srgrimes} 4241556Srgrimes 425229220Sjillesstatic int 426200956Sjillesstr_to_event(const char *str, int last) 4271556Srgrimes{ 42884261Sobrien HistEvent he; 429200956Sjilles const char *s = str; 4301556Srgrimes int relative = 0; 43184261Sobrien int i, retval; 4321556Srgrimes 43384261Sobrien retval = history(hist, &he, H_FIRST); 4341556Srgrimes switch (*s) { 4351556Srgrimes case '-': 4361556Srgrimes relative = 1; 4371556Srgrimes /*FALLTHROUGH*/ 4381556Srgrimes case '+': 4391556Srgrimes s++; 4401556Srgrimes } 4411556Srgrimes if (is_number(s)) { 4421556Srgrimes i = atoi(s); 4431556Srgrimes if (relative) { 44484261Sobrien while (retval != -1 && i--) { 44584261Sobrien retval = history(hist, &he, H_NEXT); 4461556Srgrimes } 44784261Sobrien if (retval == -1) 44884261Sobrien retval = history(hist, &he, H_LAST); 4491556Srgrimes } else { 45084261Sobrien retval = history(hist, &he, H_NEXT_EVENT, i); 45184261Sobrien if (retval == -1) { 4521556Srgrimes /* 4531556Srgrimes * the notion of first and last is 4541556Srgrimes * backwards to that of the history package 4551556Srgrimes */ 45684261Sobrien retval = history(hist, &he, last ? H_FIRST : H_LAST); 4571556Srgrimes } 4581556Srgrimes } 45984261Sobrien if (retval == -1) 4601556Srgrimes error("history number %s not found (internal error)", 4611556Srgrimes str); 4621556Srgrimes } else { 4631556Srgrimes /* 4648855Srgrimes * pattern 4651556Srgrimes */ 46684261Sobrien retval = history(hist, &he, H_PREV_STR, str); 46784261Sobrien if (retval == -1) 4681556Srgrimes error("history pattern not found: %s", str); 4691556Srgrimes } 47084261Sobrien return (he.num); 4711556Srgrimes} 472100565Stjr 473100565Stjrint 474100565Stjrbindcmd(int argc, char **argv) 475100565Stjr{ 476100565Stjr 477100565Stjr if (el == NULL) 478100565Stjr error("line editing is disabled"); 479148974Sstefanf return (el_parse(el, argc, (const char **)argv)); 480100565Stjr} 481100565Stjr 48225224Ssteve#else 48325224Ssteve#include "error.h" 48425224Ssteve 48525224Ssteveint 48690111Simphistcmd(int argc, char **argv) 48725224Ssteve{ 48825224Ssteve 48925224Ssteve error("not compiled with history support"); 49025224Ssteve /*NOTREACHED*/ 49125224Ssteve return (0); 49225224Ssteve} 493100565Stjr 494100565Stjrint 495100565Stjrbindcmd(int argc, char **argv) 496100565Stjr{ 497100565Stjr 498100565Stjr error("not compiled with line editing support"); 499100565Stjr return (0); 500100565Stjr} 50125224Ssteve#endif 502