histedit.c revision 151471
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: head/bin/sh/histedit.c 151471 2005-10-19 15:37:43Z stefanf $"); 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" 621556Srgrimes 631556Srgrimes#define MAXHISTLOOPS 4 /* max recursions through fc */ 641556Srgrimes#define DEFEDITOR "ed" /* default editor *should* be $EDITOR */ 651556Srgrimes 661556SrgrimesHistory *hist; /* history cookie */ 671556SrgrimesEditLine *el; /* editline cookie */ 681556Srgrimesint displayhist; 6984261Sobrienstatic FILE *el_in, *el_out, *el_err; 701556Srgrimes 7190111SimpSTATIC char *fc_replace(const char *, char *, char *); 721556Srgrimes 731556Srgrimes/* 741556Srgrimes * Set history and editing status. Called whenever the status may 751556Srgrimes * have changed (figures out what to do). 761556Srgrimes */ 7717987Spetervoid 7890111Simphistedit(void) 7917987Speter{ 801556Srgrimes 811556Srgrimes#define editing (Eflag || Vflag) 821556Srgrimes 831556Srgrimes if (iflag) { 841556Srgrimes if (!hist) { 851556Srgrimes /* 861556Srgrimes * turn history on 871556Srgrimes */ 881556Srgrimes INTOFF; 891556Srgrimes hist = history_init(); 901556Srgrimes INTON; 911556Srgrimes 921556Srgrimes if (hist != NULL) 9320425Ssteve sethistsize(histsizeval()); 941556Srgrimes else 951556Srgrimes out2str("sh: can't initialize history\n"); 961556Srgrimes } 971556Srgrimes if (editing && !el && isatty(0)) { /* && isatty(2) ??? */ 981556Srgrimes /* 991556Srgrimes * turn editing on 1001556Srgrimes */ 1011556Srgrimes INTOFF; 1021556Srgrimes if (el_in == NULL) 1031556Srgrimes el_in = fdopen(0, "r"); 10484261Sobrien if (el_err == NULL) 10584261Sobrien el_err = fdopen(1, "w"); 1061556Srgrimes if (el_out == NULL) 1071556Srgrimes el_out = fdopen(2, "w"); 10884261Sobrien if (el_in == NULL || el_err == NULL || el_out == NULL) 1091556Srgrimes goto bad; 11084261Sobrien el = el_init(arg0, el_in, el_out, el_err); 1111556Srgrimes if (el != NULL) { 1121556Srgrimes if (hist) 1131556Srgrimes el_set(el, EL_HIST, history, hist); 1141556Srgrimes el_set(el, EL_PROMPT, getprompt); 1151556Srgrimes } else { 1161556Srgrimesbad: 1171556Srgrimes out2str("sh: can't initialize editing\n"); 1181556Srgrimes } 1191556Srgrimes INTON; 1201556Srgrimes } else if (!editing && el) { 1211556Srgrimes INTOFF; 1221556Srgrimes el_end(el); 1231556Srgrimes el = NULL; 1241556Srgrimes INTON; 1251556Srgrimes } 1261556Srgrimes if (el) { 1271556Srgrimes if (Vflag) 1281556Srgrimes el_set(el, EL_EDITOR, "vi"); 1291556Srgrimes else if (Eflag) 1301556Srgrimes el_set(el, EL_EDITOR, "emacs"); 131100568Stjr el_source(el, NULL); 1321556Srgrimes } 1331556Srgrimes } else { 1341556Srgrimes INTOFF; 1351556Srgrimes if (el) { /* no editing if not interactive */ 1361556Srgrimes el_end(el); 1371556Srgrimes el = NULL; 1381556Srgrimes } 1391556Srgrimes if (hist) { 1401556Srgrimes history_end(hist); 1411556Srgrimes hist = NULL; 1421556Srgrimes } 1431556Srgrimes INTON; 1441556Srgrimes } 1451556Srgrimes} 1461556Srgrimes 14717987Speter 14817987Spetervoid 14920425Sstevesethistsize(hs) 15020425Ssteve const char *hs; 15117987Speter{ 1521556Srgrimes int histsize; 15384261Sobrien HistEvent he; 1541556Srgrimes 1551556Srgrimes if (hist != NULL) { 15620425Ssteve if (hs == NULL || *hs == '\0' || 15720425Ssteve (histsize = atoi(hs)) < 0) 1581556Srgrimes histsize = 100; 159151471Sstefanf history(hist, &he, H_SETSIZE, histsize); 1601556Srgrimes } 1611556Srgrimes} 1621556Srgrimes 16317987Speterint 16490111Simphistcmd(int argc, char **argv) 1651556Srgrimes{ 1661556Srgrimes int ch; 1671556Srgrimes char *editor = NULL; 16884261Sobrien HistEvent he; 1691556Srgrimes int lflg = 0, nflg = 0, rflg = 0, sflg = 0; 17084261Sobrien int i, retval; 1711556Srgrimes char *firststr, *laststr; 1721556Srgrimes int first, last, direction; 173106192Stjr char *pat = NULL, *repl; 1741556Srgrimes static int active = 0; 1751556Srgrimes struct jmploc jmploc; 1761556Srgrimes struct jmploc *volatile savehandler; 17777463Simp char editfile[PATH_MAX]; 1781556Srgrimes FILE *efp; 17997730Stjr int oldhistnum; 18017987Speter#ifdef __GNUC__ 18117987Speter /* Avoid longjmp clobbering */ 18217987Speter (void) &editor; 18317987Speter (void) &lflg; 18417987Speter (void) &nflg; 18517987Speter (void) &rflg; 18617987Speter (void) &sflg; 18717987Speter (void) &firststr; 18817987Speter (void) &laststr; 18917987Speter (void) &pat; 19017987Speter (void) &repl; 19117987Speter (void) &efp; 19217987Speter (void) &argc; 19317987Speter (void) &argv; 19417987Speter#endif 1951556Srgrimes 1961556Srgrimes if (hist == NULL) 1971556Srgrimes error("history not active"); 1988855Srgrimes 1991556Srgrimes if (argc == 1) 2001556Srgrimes error("missing history argument"); 2011556Srgrimes 2021556Srgrimes optreset = 1; optind = 1; /* initialize getopt */ 203100663Stjr opterr = 0; 2041556Srgrimes while (not_fcnumber(argv[optind]) && 20524348Simp (ch = getopt(argc, argv, ":e:lnrs")) != -1) 2061556Srgrimes switch ((char)ch) { 2071556Srgrimes case 'e': 20897731Stjr editor = optarg; 2091556Srgrimes break; 2101556Srgrimes case 'l': 2111556Srgrimes lflg = 1; 2121556Srgrimes break; 2131556Srgrimes case 'n': 2141556Srgrimes nflg = 1; 2151556Srgrimes break; 2161556Srgrimes case 'r': 2171556Srgrimes rflg = 1; 2181556Srgrimes break; 2191556Srgrimes case 's': 2201556Srgrimes sflg = 1; 2211556Srgrimes break; 2221556Srgrimes case ':': 2231556Srgrimes error("option -%c expects argument", optopt); 2241556Srgrimes case '?': 2251556Srgrimes default: 2261556Srgrimes error("unknown option: -%c", optopt); 2271556Srgrimes } 2281556Srgrimes argc -= optind, argv += optind; 2291556Srgrimes 2301556Srgrimes /* 2311556Srgrimes * If executing... 2321556Srgrimes */ 2331556Srgrimes if (lflg == 0 || editor || sflg) { 2341556Srgrimes lflg = 0; /* ignore */ 2351556Srgrimes editfile[0] = '\0'; 2361556Srgrimes /* 2371556Srgrimes * Catch interrupts to reset active counter and 2381556Srgrimes * cleanup temp files. 2391556Srgrimes */ 2401556Srgrimes if (setjmp(jmploc.loc)) { 2411556Srgrimes active = 0; 2421556Srgrimes if (*editfile) 2431556Srgrimes unlink(editfile); 2441556Srgrimes handler = savehandler; 2451556Srgrimes longjmp(handler->loc, 1); 2461556Srgrimes } 2471556Srgrimes savehandler = handler; 2481556Srgrimes handler = &jmploc; 2491556Srgrimes if (++active > MAXHISTLOOPS) { 2501556Srgrimes active = 0; 2511556Srgrimes displayhist = 0; 2521556Srgrimes error("called recursively too many times"); 2531556Srgrimes } 2541556Srgrimes /* 2551556Srgrimes * Set editor. 2561556Srgrimes */ 2571556Srgrimes if (sflg == 0) { 2581556Srgrimes if (editor == NULL && 2591556Srgrimes (editor = bltinlookup("FCEDIT", 1)) == NULL && 2601556Srgrimes (editor = bltinlookup("EDITOR", 1)) == NULL) 2611556Srgrimes editor = DEFEDITOR; 2621556Srgrimes if (editor[0] == '-' && editor[1] == '\0') { 2631556Srgrimes sflg = 1; /* no edit */ 2641556Srgrimes editor = NULL; 2651556Srgrimes } 2661556Srgrimes } 2671556Srgrimes } 2681556Srgrimes 2691556Srgrimes /* 2701556Srgrimes * If executing, parse [old=new] now 2711556Srgrimes */ 2728855Srgrimes if (lflg == 0 && argc > 0 && 2731556Srgrimes ((repl = strchr(argv[0], '=')) != NULL)) { 2741556Srgrimes pat = argv[0]; 2751556Srgrimes *repl++ = '\0'; 2761556Srgrimes argc--, argv++; 2771556Srgrimes } 2781556Srgrimes /* 2791556Srgrimes * determine [first] and [last] 2801556Srgrimes */ 2811556Srgrimes switch (argc) { 2821556Srgrimes case 0: 2831556Srgrimes firststr = lflg ? "-16" : "-1"; 2841556Srgrimes laststr = "-1"; 2851556Srgrimes break; 2861556Srgrimes case 1: 2871556Srgrimes firststr = argv[0]; 2881556Srgrimes laststr = lflg ? "-1" : argv[0]; 2891556Srgrimes break; 2901556Srgrimes case 2: 2911556Srgrimes firststr = argv[0]; 2921556Srgrimes laststr = argv[1]; 2931556Srgrimes break; 2941556Srgrimes default: 2951556Srgrimes error("too many args"); 2961556Srgrimes } 2971556Srgrimes /* 2981556Srgrimes * Turn into event numbers. 2991556Srgrimes */ 3001556Srgrimes first = str_to_event(firststr, 0); 3011556Srgrimes last = str_to_event(laststr, 1); 3021556Srgrimes 3031556Srgrimes if (rflg) { 3041556Srgrimes i = last; 3051556Srgrimes last = first; 3061556Srgrimes first = i; 3071556Srgrimes } 3081556Srgrimes /* 3091556Srgrimes * XXX - this should not depend on the event numbers 3108855Srgrimes * always increasing. Add sequence numbers or offset 3111556Srgrimes * to the history element in next (diskbased) release. 3121556Srgrimes */ 3131556Srgrimes direction = first < last ? H_PREV : H_NEXT; 3141556Srgrimes 3151556Srgrimes /* 3161556Srgrimes * If editing, grab a temp file. 3171556Srgrimes */ 3181556Srgrimes if (editor) { 3191556Srgrimes int fd; 3201556Srgrimes INTOFF; /* easier */ 3211556Srgrimes sprintf(editfile, "%s/_shXXXXXX", _PATH_TMP); 3221556Srgrimes if ((fd = mkstemp(editfile)) < 0) 3231556Srgrimes error("can't create temporary file %s", editfile); 3241556Srgrimes if ((efp = fdopen(fd, "w")) == NULL) { 3251556Srgrimes close(fd); 32618016Speter error("can't allocate stdio buffer for temp"); 3271556Srgrimes } 3281556Srgrimes } 3291556Srgrimes 3301556Srgrimes /* 3311556Srgrimes * Loop through selected history events. If listing or executing, 3321556Srgrimes * do it now. Otherwise, put into temp file and call the editor 3331556Srgrimes * after. 3341556Srgrimes * 3351556Srgrimes * The history interface needs rethinking, as the following 3361556Srgrimes * convolutions will demonstrate. 3371556Srgrimes */ 33884261Sobrien history(hist, &he, H_FIRST); 33984261Sobrien retval = history(hist, &he, H_NEXT_EVENT, first); 34084261Sobrien for (;retval != -1; retval = history(hist, &he, direction)) { 3411556Srgrimes if (lflg) { 3421556Srgrimes if (!nflg) 34384261Sobrien out1fmt("%5d ", he.num); 34484261Sobrien out1str(he.str); 3451556Srgrimes } else { 3468855Srgrimes char *s = pat ? 34784261Sobrien fc_replace(he.str, pat, repl) : (char *)he.str; 3481556Srgrimes 3491556Srgrimes if (sflg) { 3501556Srgrimes if (displayhist) { 3511556Srgrimes out2str(s); 3521556Srgrimes } 3531556Srgrimes evalstring(s); 3541556Srgrimes if (displayhist && hist) { 3551556Srgrimes /* 3568855Srgrimes * XXX what about recursive and 3571556Srgrimes * relative histnums. 3581556Srgrimes */ 35997730Stjr oldhistnum = he.num; 36084261Sobrien history(hist, &he, H_ENTER, s); 36197730Stjr /* 36297730Stjr * XXX H_ENTER moves the internal 36397730Stjr * cursor, set it back to the current 36497730Stjr * entry. 36597730Stjr */ 36697730Stjr retval = history(hist, &he, 36797730Stjr H_NEXT_EVENT, oldhistnum); 3681556Srgrimes } 3691556Srgrimes } else 3701556Srgrimes fputs(s, efp); 3711556Srgrimes } 3721556Srgrimes /* 3731556Srgrimes * At end? (if we were to loose last, we'd sure be 3741556Srgrimes * messed up). 3751556Srgrimes */ 37684261Sobrien if (he.num == last) 3771556Srgrimes break; 3781556Srgrimes } 3791556Srgrimes if (editor) { 3801556Srgrimes char *editcmd; 3811556Srgrimes 3821556Srgrimes fclose(efp); 3831556Srgrimes editcmd = stalloc(strlen(editor) + strlen(editfile) + 2); 3841556Srgrimes sprintf(editcmd, "%s %s", editor, editfile); 3851556Srgrimes evalstring(editcmd); /* XXX - should use no JC command */ 3861556Srgrimes INTON; 3871556Srgrimes readcmdfile(editfile); /* XXX - should read back - quick tst */ 3881556Srgrimes unlink(editfile); 3891556Srgrimes } 3908855Srgrimes 3911556Srgrimes if (lflg == 0 && active > 0) 3921556Srgrimes --active; 3931556Srgrimes if (displayhist) 3941556Srgrimes displayhist = 0; 39517987Speter return 0; 3961556Srgrimes} 3971556Srgrimes 3981556SrgrimesSTATIC char * 39990111Simpfc_replace(const char *s, char *p, char *r) 4001556Srgrimes{ 4011556Srgrimes char *dest; 4021556Srgrimes int plen = strlen(p); 4031556Srgrimes 4041556Srgrimes STARTSTACKSTR(dest); 4051556Srgrimes while (*s) { 4061556Srgrimes if (*s == *p && strncmp(s, p, plen) == 0) { 4071556Srgrimes while (*r) 4081556Srgrimes STPUTC(*r++, dest); 4091556Srgrimes s += plen; 4101556Srgrimes *p = '\0'; /* so no more matches */ 4111556Srgrimes } else 4121556Srgrimes STPUTC(*s++, dest); 4131556Srgrimes } 4141556Srgrimes STACKSTRNUL(dest); 4151556Srgrimes dest = grabstackstr(dest); 4161556Srgrimes 4171556Srgrimes return (dest); 4181556Srgrimes} 4191556Srgrimes 42017987Speterint 42190111Simpnot_fcnumber(char *s) 4221556Srgrimes{ 42320425Ssteve if (s == NULL) 42425224Ssteve return (0); 42520425Ssteve if (*s == '-') 42620425Ssteve s++; 4271556Srgrimes return (!is_number(s)); 4281556Srgrimes} 4291556Srgrimes 43017987Speterint 43190111Simpstr_to_event(char *str, int last) 4321556Srgrimes{ 43384261Sobrien HistEvent he; 4341556Srgrimes char *s = str; 4351556Srgrimes int relative = 0; 43684261Sobrien int i, retval; 4371556Srgrimes 43884261Sobrien retval = history(hist, &he, 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) { 44984261Sobrien while (retval != -1 && i--) { 45084261Sobrien retval = history(hist, &he, H_NEXT); 4511556Srgrimes } 45284261Sobrien if (retval == -1) 45384261Sobrien retval = history(hist, &he, H_LAST); 4541556Srgrimes } else { 45584261Sobrien retval = history(hist, &he, H_NEXT_EVENT, i); 45684261Sobrien if (retval == -1) { 4571556Srgrimes /* 4581556Srgrimes * the notion of first and last is 4591556Srgrimes * backwards to that of the history package 4601556Srgrimes */ 46184261Sobrien retval = history(hist, &he, last ? H_FIRST : H_LAST); 4621556Srgrimes } 4631556Srgrimes } 46484261Sobrien if (retval == -1) 4651556Srgrimes error("history number %s not found (internal error)", 4661556Srgrimes str); 4671556Srgrimes } else { 4681556Srgrimes /* 4698855Srgrimes * pattern 4701556Srgrimes */ 47184261Sobrien retval = history(hist, &he, H_PREV_STR, str); 47284261Sobrien if (retval == -1) 4731556Srgrimes error("history pattern not found: %s", str); 4741556Srgrimes } 47584261Sobrien return (he.num); 4761556Srgrimes} 477100565Stjr 478100565Stjrint 479100565Stjrbindcmd(int argc, char **argv) 480100565Stjr{ 481100565Stjr 482100565Stjr if (el == NULL) 483100565Stjr error("line editing is disabled"); 484148974Sstefanf return (el_parse(el, argc, (const char **)argv)); 485100565Stjr} 486100565Stjr 48725224Ssteve#else 48825224Ssteve#include "error.h" 48925224Ssteve 49025224Ssteveint 49190111Simphistcmd(int argc, char **argv) 49225224Ssteve{ 49325224Ssteve 49425224Ssteve error("not compiled with history support"); 49525224Ssteve /*NOTREACHED*/ 49625224Ssteve return (0); 49725224Ssteve} 498100565Stjr 499100565Stjrint 500100565Stjrbindcmd(int argc, char **argv) 501100565Stjr{ 502100565Stjr 503100565Stjr error("not compiled with line editing support"); 504100565Stjr return (0); 505100565Stjr} 50625224Ssteve#endif 507