histedit.c revision 25224
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 * 3. All advertising materials mentioning features or use of this software 171556Srgrimes * must display the following acknowledgement: 181556Srgrimes * This product includes software developed by the University of 191556Srgrimes * California, Berkeley and its contributors. 201556Srgrimes * 4. Neither the name of the University nor the names of its contributors 211556Srgrimes * may be used to endorse or promote products derived from this software 221556Srgrimes * without specific prior written permission. 231556Srgrimes * 241556Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 251556Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 261556Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 271556Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 281556Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 291556Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 301556Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 311556Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 321556Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 331556Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 341556Srgrimes * SUCH DAMAGE. 353044Sdg * 3625224Ssteve * $Id: histedit.c,v 1.10 1997/03/28 15:24:38 imp Exp $ 371556Srgrimes */ 381556Srgrimes 391556Srgrimes#ifndef lint 4020425Sstevestatic char const sccsid[] = "@(#)histedit.c 8.2 (Berkeley) 5/4/95"; 411556Srgrimes#endif /* not lint */ 421556Srgrimes 4317987Speter#include <sys/param.h> 4417987Speter#include <paths.h> 4517987Speter#include <stdio.h> 4617987Speter#include <stdlib.h> 4717987Speter#include <unistd.h> 481556Srgrimes/* 491556Srgrimes * Editline and history functions (and glue). 501556Srgrimes */ 511556Srgrimes#include "shell.h" 521556Srgrimes#include "parser.h" 531556Srgrimes#include "var.h" 541556Srgrimes#include "options.h" 5517987Speter#include "main.h" 5617987Speter#include "output.h" 571556Srgrimes#include "mystring.h" 5817987Speter#ifndef NO_HISTORY 5917987Speter#include "myhistedit.h" 601556Srgrimes#include "error.h" 6117987Speter#include "eval.h" 621556Srgrimes#include "memalloc.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; 701556Srgrimesstatic FILE *el_in, *el_out; 711556Srgrimes 721556SrgrimesSTATIC char *fc_replace __P((const char *, char *, char *)); 731556Srgrimes 741556Srgrimes/* 751556Srgrimes * Set history and editing status. Called whenever the status may 761556Srgrimes * have changed (figures out what to do). 771556Srgrimes */ 7817987Spetervoid 7920425Sstevehistedit() 8017987Speter{ 811556Srgrimes 821556Srgrimes#define editing (Eflag || Vflag) 831556Srgrimes 841556Srgrimes if (iflag) { 851556Srgrimes if (!hist) { 861556Srgrimes /* 871556Srgrimes * turn history on 881556Srgrimes */ 891556Srgrimes INTOFF; 901556Srgrimes hist = history_init(); 911556Srgrimes INTON; 921556Srgrimes 931556Srgrimes if (hist != NULL) 9420425Ssteve sethistsize(histsizeval()); 951556Srgrimes else 961556Srgrimes out2str("sh: can't initialize history\n"); 971556Srgrimes } 981556Srgrimes if (editing && !el && isatty(0)) { /* && isatty(2) ??? */ 991556Srgrimes /* 1001556Srgrimes * turn editing on 1011556Srgrimes */ 1021556Srgrimes INTOFF; 1031556Srgrimes if (el_in == NULL) 1041556Srgrimes el_in = fdopen(0, "r"); 1051556Srgrimes if (el_out == NULL) 1061556Srgrimes el_out = fdopen(2, "w"); 1071556Srgrimes if (el_in == NULL || el_out == NULL) 1081556Srgrimes goto bad; 1091556Srgrimes el = el_init(arg0, el_in, el_out); 1101556Srgrimes if (el != NULL) { 1111556Srgrimes if (hist) 1121556Srgrimes el_set(el, EL_HIST, history, hist); 1131556Srgrimes el_set(el, EL_PROMPT, getprompt); 1141556Srgrimes } else { 1151556Srgrimesbad: 1161556Srgrimes out2str("sh: can't initialize editing\n"); 1171556Srgrimes } 1181556Srgrimes INTON; 1191556Srgrimes } else if (!editing && el) { 1201556Srgrimes INTOFF; 1211556Srgrimes el_end(el); 1221556Srgrimes el = NULL; 1231556Srgrimes INTON; 1241556Srgrimes } 1251556Srgrimes if (el) { 1261556Srgrimes if (Vflag) 1271556Srgrimes el_set(el, EL_EDITOR, "vi"); 1281556Srgrimes else if (Eflag) 1291556Srgrimes el_set(el, EL_EDITOR, "emacs"); 1301556Srgrimes } 1311556Srgrimes } else { 1321556Srgrimes INTOFF; 1331556Srgrimes if (el) { /* no editing if not interactive */ 1341556Srgrimes el_end(el); 1351556Srgrimes el = NULL; 1361556Srgrimes } 1371556Srgrimes if (hist) { 1381556Srgrimes history_end(hist); 1391556Srgrimes hist = NULL; 1401556Srgrimes } 1411556Srgrimes INTON; 1421556Srgrimes } 1431556Srgrimes} 1441556Srgrimes 14517987Speter 14617987Spetervoid 14720425Sstevesethistsize(hs) 14820425Ssteve const char *hs; 14917987Speter{ 1501556Srgrimes int histsize; 1511556Srgrimes 1521556Srgrimes if (hist != NULL) { 15320425Ssteve if (hs == NULL || *hs == '\0' || 15420425Ssteve (histsize = atoi(hs)) < 0) 1551556Srgrimes histsize = 100; 1561556Srgrimes history(hist, H_EVENT, histsize); 1571556Srgrimes } 1581556Srgrimes} 1591556Srgrimes 1601556Srgrimes/* 1611556Srgrimes * This command is provided since POSIX decided to standardize 1621556Srgrimes * the Korn shell fc command. Oh well... 1631556Srgrimes */ 16417987Speterint 1651556Srgrimeshistcmd(argc, argv) 16617987Speter int argc; 16717987Speter char **argv; 1681556Srgrimes{ 1691556Srgrimes extern char *optarg; 1701556Srgrimes extern int optind, optopt, optreset; 1711556Srgrimes int ch; 1721556Srgrimes char *editor = NULL; 1731556Srgrimes const HistEvent *he; 1741556Srgrimes int lflg = 0, nflg = 0, rflg = 0, sflg = 0; 1751556Srgrimes int i; 1761556Srgrimes char *firststr, *laststr; 1771556Srgrimes int first, last, direction; 1781556Srgrimes char *pat = NULL, *repl; /* ksh "fc old=new" crap */ 1791556Srgrimes static int active = 0; 1801556Srgrimes struct jmploc jmploc; 1811556Srgrimes struct jmploc *volatile savehandler; 1821556Srgrimes char editfile[MAXPATHLEN + 1]; 1831556Srgrimes FILE *efp; 18417987Speter#ifdef __GNUC__ 18517987Speter /* Avoid longjmp clobbering */ 18617987Speter (void) &editor; 18717987Speter (void) &lflg; 18817987Speter (void) &nflg; 18917987Speter (void) &rflg; 19017987Speter (void) &sflg; 19117987Speter (void) &firststr; 19217987Speter (void) &laststr; 19317987Speter (void) &pat; 19417987Speter (void) &repl; 19517987Speter (void) &efp; 19617987Speter (void) &argc; 19717987Speter (void) &argv; 19817987Speter#endif 1991556Srgrimes 2001556Srgrimes if (hist == NULL) 2011556Srgrimes error("history not active"); 2028855Srgrimes 2031556Srgrimes if (argc == 1) 2041556Srgrimes error("missing history argument"); 2051556Srgrimes 2061556Srgrimes optreset = 1; optind = 1; /* initialize getopt */ 2071556Srgrimes while (not_fcnumber(argv[optind]) && 20824348Simp (ch = getopt(argc, argv, ":e:lnrs")) != -1) 2091556Srgrimes switch ((char)ch) { 2101556Srgrimes case 'e': 2111556Srgrimes editor = optarg; 2121556Srgrimes break; 2131556Srgrimes case 'l': 2141556Srgrimes lflg = 1; 2151556Srgrimes break; 2161556Srgrimes case 'n': 2171556Srgrimes nflg = 1; 2181556Srgrimes break; 2191556Srgrimes case 'r': 2201556Srgrimes rflg = 1; 2211556Srgrimes break; 2221556Srgrimes case 's': 2231556Srgrimes sflg = 1; 2241556Srgrimes break; 2251556Srgrimes case ':': 2261556Srgrimes error("option -%c expects argument", optopt); 2271556Srgrimes case '?': 2281556Srgrimes default: 2291556Srgrimes error("unknown option: -%c", optopt); 2301556Srgrimes } 2311556Srgrimes argc -= optind, argv += optind; 2321556Srgrimes 2331556Srgrimes /* 2341556Srgrimes * If executing... 2351556Srgrimes */ 2361556Srgrimes if (lflg == 0 || editor || sflg) { 2371556Srgrimes lflg = 0; /* ignore */ 2381556Srgrimes editfile[0] = '\0'; 2391556Srgrimes /* 2401556Srgrimes * Catch interrupts to reset active counter and 2411556Srgrimes * cleanup temp files. 2421556Srgrimes */ 2431556Srgrimes if (setjmp(jmploc.loc)) { 2441556Srgrimes active = 0; 2451556Srgrimes if (*editfile) 2461556Srgrimes unlink(editfile); 2471556Srgrimes handler = savehandler; 2481556Srgrimes longjmp(handler->loc, 1); 2491556Srgrimes } 2501556Srgrimes savehandler = handler; 2511556Srgrimes handler = &jmploc; 2521556Srgrimes if (++active > MAXHISTLOOPS) { 2531556Srgrimes active = 0; 2541556Srgrimes displayhist = 0; 2551556Srgrimes error("called recursively too many times"); 2561556Srgrimes } 2571556Srgrimes /* 2581556Srgrimes * Set editor. 2591556Srgrimes */ 2601556Srgrimes if (sflg == 0) { 2611556Srgrimes if (editor == NULL && 2621556Srgrimes (editor = bltinlookup("FCEDIT", 1)) == NULL && 2631556Srgrimes (editor = bltinlookup("EDITOR", 1)) == NULL) 2641556Srgrimes editor = DEFEDITOR; 2651556Srgrimes if (editor[0] == '-' && editor[1] == '\0') { 2661556Srgrimes sflg = 1; /* no edit */ 2671556Srgrimes editor = NULL; 2681556Srgrimes } 2691556Srgrimes } 2701556Srgrimes } 2711556Srgrimes 2721556Srgrimes /* 2731556Srgrimes * If executing, parse [old=new] now 2741556Srgrimes */ 2758855Srgrimes if (lflg == 0 && argc > 0 && 2761556Srgrimes ((repl = strchr(argv[0], '=')) != NULL)) { 2771556Srgrimes pat = argv[0]; 2781556Srgrimes *repl++ = '\0'; 2791556Srgrimes argc--, argv++; 2801556Srgrimes } 2811556Srgrimes /* 2821556Srgrimes * determine [first] and [last] 2831556Srgrimes */ 2841556Srgrimes switch (argc) { 2851556Srgrimes case 0: 2861556Srgrimes firststr = lflg ? "-16" : "-1"; 2871556Srgrimes laststr = "-1"; 2881556Srgrimes break; 2891556Srgrimes case 1: 2901556Srgrimes firststr = argv[0]; 2911556Srgrimes laststr = lflg ? "-1" : argv[0]; 2921556Srgrimes break; 2931556Srgrimes case 2: 2941556Srgrimes firststr = argv[0]; 2951556Srgrimes laststr = argv[1]; 2961556Srgrimes break; 2971556Srgrimes default: 2981556Srgrimes error("too many args"); 2991556Srgrimes } 3001556Srgrimes /* 3011556Srgrimes * Turn into event numbers. 3021556Srgrimes */ 3031556Srgrimes first = str_to_event(firststr, 0); 3041556Srgrimes last = str_to_event(laststr, 1); 3051556Srgrimes 3061556Srgrimes if (rflg) { 3071556Srgrimes i = last; 3081556Srgrimes last = first; 3091556Srgrimes first = i; 3101556Srgrimes } 3111556Srgrimes /* 3121556Srgrimes * XXX - this should not depend on the event numbers 3138855Srgrimes * always increasing. Add sequence numbers or offset 3141556Srgrimes * to the history element in next (diskbased) release. 3151556Srgrimes */ 3161556Srgrimes direction = first < last ? H_PREV : H_NEXT; 3171556Srgrimes 3181556Srgrimes /* 3191556Srgrimes * If editing, grab a temp file. 3201556Srgrimes */ 3211556Srgrimes if (editor) { 3221556Srgrimes int fd; 3231556Srgrimes INTOFF; /* easier */ 3241556Srgrimes sprintf(editfile, "%s/_shXXXXXX", _PATH_TMP); 3251556Srgrimes if ((fd = mkstemp(editfile)) < 0) 3261556Srgrimes error("can't create temporary file %s", editfile); 3271556Srgrimes if ((efp = fdopen(fd, "w")) == NULL) { 3281556Srgrimes close(fd); 32918016Speter error("can't allocate stdio buffer for temp"); 3301556Srgrimes } 3311556Srgrimes } 3321556Srgrimes 3331556Srgrimes /* 3341556Srgrimes * Loop through selected history events. If listing or executing, 3351556Srgrimes * do it now. Otherwise, put into temp file and call the editor 3361556Srgrimes * after. 3371556Srgrimes * 3381556Srgrimes * The history interface needs rethinking, as the following 3391556Srgrimes * convolutions will demonstrate. 3401556Srgrimes */ 3411556Srgrimes history(hist, H_FIRST); 3421556Srgrimes he = history(hist, H_NEXT_EVENT, first); 3431556Srgrimes for (;he != NULL; he = history(hist, direction)) { 3441556Srgrimes if (lflg) { 3451556Srgrimes if (!nflg) 3461556Srgrimes out1fmt("%5d ", he->num); 3471556Srgrimes out1str(he->str); 3481556Srgrimes } else { 3498855Srgrimes char *s = pat ? 3501556Srgrimes fc_replace(he->str, pat, repl) : (char *)he->str; 3511556Srgrimes 3521556Srgrimes if (sflg) { 3531556Srgrimes if (displayhist) { 3541556Srgrimes out2str(s); 3551556Srgrimes } 3561556Srgrimes evalstring(s); 3571556Srgrimes if (displayhist && hist) { 3581556Srgrimes /* 3598855Srgrimes * XXX what about recursive and 3601556Srgrimes * relative histnums. 3611556Srgrimes */ 3621556Srgrimes history(hist, H_ENTER, s); 3631556Srgrimes } 3641556Srgrimes } else 3651556Srgrimes fputs(s, efp); 3661556Srgrimes } 3671556Srgrimes /* 3681556Srgrimes * At end? (if we were to loose last, we'd sure be 3691556Srgrimes * messed up). 3701556Srgrimes */ 3711556Srgrimes 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); 3801556Srgrimes evalstring(editcmd); /* 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; 39017987Speter return 0; 3911556Srgrimes} 3921556Srgrimes 3931556SrgrimesSTATIC char * 3941556Srgrimesfc_replace(s, p, r) 3951556Srgrimes const char *s; 3961556Srgrimes char *p, *r; 3971556Srgrimes{ 3981556Srgrimes char *dest; 3991556Srgrimes int plen = strlen(p); 4001556Srgrimes 4011556Srgrimes STARTSTACKSTR(dest); 4021556Srgrimes while (*s) { 4031556Srgrimes if (*s == *p && strncmp(s, p, plen) == 0) { 4041556Srgrimes while (*r) 4051556Srgrimes STPUTC(*r++, dest); 4061556Srgrimes s += plen; 4071556Srgrimes *p = '\0'; /* so no more matches */ 4081556Srgrimes } else 4091556Srgrimes STPUTC(*s++, dest); 4101556Srgrimes } 4111556Srgrimes STACKSTRNUL(dest); 4121556Srgrimes dest = grabstackstr(dest); 4131556Srgrimes 4141556Srgrimes return (dest); 4151556Srgrimes} 4161556Srgrimes 41717987Speterint 4181556Srgrimesnot_fcnumber(s) 41920425Ssteve char *s; 4201556Srgrimes{ 42120425Ssteve if (s == NULL) 42225224Ssteve return (0); 42320425Ssteve if (*s == '-') 42420425Ssteve s++; 4251556Srgrimes return (!is_number(s)); 4261556Srgrimes} 4271556Srgrimes 42817987Speterint 4291556Srgrimesstr_to_event(str, last) 4301556Srgrimes char *str; 4311556Srgrimes int last; 4321556Srgrimes{ 4331556Srgrimes const HistEvent *he; 4341556Srgrimes char *s = str; 4351556Srgrimes int relative = 0; 43617987Speter int i; 4371556Srgrimes 4381556Srgrimes he = history(hist, H_FIRST); 4391556Srgrimes switch (*s) { 4401556Srgrimes case '-': 4411556Srgrimes relative = 1; 4421556Srgrimes /*FALLTHROUGH*/ 4431556Srgrimes case '+': 4441556Srgrimes s++; 4451556Srgrimes } 4461556Srgrimes if (is_number(s)) { 4471556Srgrimes i = atoi(s); 4481556Srgrimes if (relative) { 4491556Srgrimes while (he != NULL && i--) { 4501556Srgrimes he = history(hist, H_NEXT); 4511556Srgrimes } 4521556Srgrimes if (he == NULL) 4531556Srgrimes he = history(hist, H_LAST); 4541556Srgrimes } else { 4551556Srgrimes he = history(hist, H_NEXT_EVENT, i); 4561556Srgrimes if (he == NULL) { 4571556Srgrimes /* 4581556Srgrimes * the notion of first and last is 4591556Srgrimes * backwards to that of the history package 4601556Srgrimes */ 4611556Srgrimes he = history(hist, last ? H_FIRST : H_LAST); 4621556Srgrimes } 4631556Srgrimes } 4641556Srgrimes if (he == NULL) 4651556Srgrimes error("history number %s not found (internal error)", 4661556Srgrimes str); 4671556Srgrimes } else { 4681556Srgrimes /* 4698855Srgrimes * pattern 4701556Srgrimes */ 4711556Srgrimes he = history(hist, H_PREV_STR, str); 4721556Srgrimes if (he == NULL) 4731556Srgrimes error("history pattern not found: %s", str); 4741556Srgrimes } 4751556Srgrimes return (he->num); 4761556Srgrimes} 47725224Ssteve#else 47825224Ssteve#include "error.h" 47925224Ssteve 48025224Ssteveint 48125224Sstevehistcmd(argc, argv) 48225224Ssteve int argc; 48325224Ssteve char **argv; 48425224Ssteve{ 48525224Ssteve 48625224Ssteve error("not compiled with history support"); 48725224Ssteve /*NOTREACHED*/ 48825224Ssteve return (0); 48925224Ssteve} 49025224Ssteve#endif 491