histedit.c revision 199629
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 199629 2009-11-21 14:28:32Z jilles $"); 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 95199629Sjilles out2fmt_flush("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: 117199629Sjilles out2fmt_flush("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; 176194765Sjilles struct jmploc *savehandler; 177194765Sjilles char editfilestr[PATH_MAX]; 178194765Sjilles char *volatile editfile; 1791556Srgrimes FILE *efp; 18097730Stjr int oldhistnum; 1811556Srgrimes 1821556Srgrimes if (hist == NULL) 1831556Srgrimes error("history not active"); 1848855Srgrimes 1851556Srgrimes if (argc == 1) 1861556Srgrimes error("missing history argument"); 1871556Srgrimes 1881556Srgrimes optreset = 1; optind = 1; /* initialize getopt */ 189100663Stjr opterr = 0; 1901556Srgrimes while (not_fcnumber(argv[optind]) && 19124348Simp (ch = getopt(argc, argv, ":e:lnrs")) != -1) 1921556Srgrimes switch ((char)ch) { 1931556Srgrimes case 'e': 19497731Stjr editor = optarg; 1951556Srgrimes break; 1961556Srgrimes case 'l': 1971556Srgrimes lflg = 1; 1981556Srgrimes break; 1991556Srgrimes case 'n': 2001556Srgrimes nflg = 1; 2011556Srgrimes break; 2021556Srgrimes case 'r': 2031556Srgrimes rflg = 1; 2041556Srgrimes break; 2051556Srgrimes case 's': 2061556Srgrimes sflg = 1; 2071556Srgrimes break; 2081556Srgrimes case ':': 2091556Srgrimes error("option -%c expects argument", optopt); 2101556Srgrimes case '?': 2111556Srgrimes default: 2121556Srgrimes error("unknown option: -%c", optopt); 2131556Srgrimes } 2141556Srgrimes argc -= optind, argv += optind; 2151556Srgrimes 2161556Srgrimes /* 2171556Srgrimes * If executing... 2181556Srgrimes */ 2191556Srgrimes if (lflg == 0 || editor || sflg) { 2201556Srgrimes lflg = 0; /* ignore */ 221194765Sjilles editfile = NULL; 2221556Srgrimes /* 2231556Srgrimes * Catch interrupts to reset active counter and 2241556Srgrimes * cleanup temp files. 2251556Srgrimes */ 226194765Sjilles savehandler = handler; 2271556Srgrimes if (setjmp(jmploc.loc)) { 2281556Srgrimes active = 0; 229194765Sjilles if (editfile) 2301556Srgrimes unlink(editfile); 2311556Srgrimes handler = savehandler; 2321556Srgrimes longjmp(handler->loc, 1); 2331556Srgrimes } 2341556Srgrimes handler = &jmploc; 2351556Srgrimes if (++active > MAXHISTLOOPS) { 2361556Srgrimes active = 0; 2371556Srgrimes displayhist = 0; 2381556Srgrimes error("called recursively too many times"); 2391556Srgrimes } 2401556Srgrimes /* 2411556Srgrimes * Set editor. 2421556Srgrimes */ 2431556Srgrimes if (sflg == 0) { 2441556Srgrimes if (editor == NULL && 2451556Srgrimes (editor = bltinlookup("FCEDIT", 1)) == NULL && 2461556Srgrimes (editor = bltinlookup("EDITOR", 1)) == NULL) 2471556Srgrimes editor = DEFEDITOR; 2481556Srgrimes if (editor[0] == '-' && editor[1] == '\0') { 2491556Srgrimes sflg = 1; /* no edit */ 2501556Srgrimes editor = NULL; 2511556Srgrimes } 2521556Srgrimes } 2531556Srgrimes } 2541556Srgrimes 2551556Srgrimes /* 2561556Srgrimes * If executing, parse [old=new] now 2571556Srgrimes */ 2588855Srgrimes if (lflg == 0 && argc > 0 && 2591556Srgrimes ((repl = strchr(argv[0], '=')) != NULL)) { 2601556Srgrimes pat = argv[0]; 2611556Srgrimes *repl++ = '\0'; 2621556Srgrimes argc--, argv++; 2631556Srgrimes } 2641556Srgrimes /* 2651556Srgrimes * determine [first] and [last] 2661556Srgrimes */ 2671556Srgrimes switch (argc) { 2681556Srgrimes case 0: 2691556Srgrimes firststr = lflg ? "-16" : "-1"; 2701556Srgrimes laststr = "-1"; 2711556Srgrimes break; 2721556Srgrimes case 1: 2731556Srgrimes firststr = argv[0]; 2741556Srgrimes laststr = lflg ? "-1" : argv[0]; 2751556Srgrimes break; 2761556Srgrimes case 2: 2771556Srgrimes firststr = argv[0]; 2781556Srgrimes laststr = argv[1]; 2791556Srgrimes break; 2801556Srgrimes default: 2811556Srgrimes error("too many args"); 2821556Srgrimes } 2831556Srgrimes /* 2841556Srgrimes * Turn into event numbers. 2851556Srgrimes */ 2861556Srgrimes first = str_to_event(firststr, 0); 2871556Srgrimes last = str_to_event(laststr, 1); 2881556Srgrimes 2891556Srgrimes if (rflg) { 2901556Srgrimes i = last; 2911556Srgrimes last = first; 2921556Srgrimes first = i; 2931556Srgrimes } 2941556Srgrimes /* 2951556Srgrimes * XXX - this should not depend on the event numbers 2968855Srgrimes * always increasing. Add sequence numbers or offset 2971556Srgrimes * to the history element in next (diskbased) release. 2981556Srgrimes */ 2991556Srgrimes direction = first < last ? H_PREV : H_NEXT; 3001556Srgrimes 3011556Srgrimes /* 3021556Srgrimes * If editing, grab a temp file. 3031556Srgrimes */ 3041556Srgrimes if (editor) { 3051556Srgrimes int fd; 3061556Srgrimes INTOFF; /* easier */ 307194765Sjilles sprintf(editfilestr, "%s/_shXXXXXX", _PATH_TMP); 308194765Sjilles if ((fd = mkstemp(editfilestr)) < 0) 3091556Srgrimes error("can't create temporary file %s", editfile); 310194765Sjilles editfile = editfilestr; 3111556Srgrimes if ((efp = fdopen(fd, "w")) == NULL) { 3121556Srgrimes close(fd); 31318016Speter error("can't allocate stdio buffer for temp"); 3141556Srgrimes } 3151556Srgrimes } 3161556Srgrimes 3171556Srgrimes /* 3181556Srgrimes * Loop through selected history events. If listing or executing, 3191556Srgrimes * do it now. Otherwise, put into temp file and call the editor 3201556Srgrimes * after. 3211556Srgrimes * 3221556Srgrimes * The history interface needs rethinking, as the following 3231556Srgrimes * convolutions will demonstrate. 3241556Srgrimes */ 32584261Sobrien history(hist, &he, H_FIRST); 32684261Sobrien retval = history(hist, &he, H_NEXT_EVENT, first); 32784261Sobrien for (;retval != -1; retval = history(hist, &he, direction)) { 3281556Srgrimes if (lflg) { 3291556Srgrimes if (!nflg) 33084261Sobrien out1fmt("%5d ", he.num); 33184261Sobrien out1str(he.str); 3321556Srgrimes } else { 3338855Srgrimes char *s = pat ? 33484261Sobrien fc_replace(he.str, pat, repl) : (char *)he.str; 3351556Srgrimes 3361556Srgrimes if (sflg) { 3371556Srgrimes if (displayhist) { 3381556Srgrimes out2str(s); 339199629Sjilles flushout(out2); 3401556Srgrimes } 341193169Sstefanf evalstring(s, 0); 3421556Srgrimes if (displayhist && hist) { 3431556Srgrimes /* 3448855Srgrimes * XXX what about recursive and 3451556Srgrimes * relative histnums. 3461556Srgrimes */ 34797730Stjr oldhistnum = he.num; 34884261Sobrien history(hist, &he, H_ENTER, s); 34997730Stjr /* 35097730Stjr * XXX H_ENTER moves the internal 35197730Stjr * cursor, set it back to the current 35297730Stjr * entry. 35397730Stjr */ 35497730Stjr retval = history(hist, &he, 35597730Stjr H_NEXT_EVENT, oldhistnum); 3561556Srgrimes } 3571556Srgrimes } else 3581556Srgrimes fputs(s, efp); 3591556Srgrimes } 3601556Srgrimes /* 361160964Syar * At end? (if we were to lose last, we'd sure be 3621556Srgrimes * messed up). 3631556Srgrimes */ 36484261Sobrien if (he.num == last) 3651556Srgrimes break; 3661556Srgrimes } 3671556Srgrimes if (editor) { 3681556Srgrimes char *editcmd; 3691556Srgrimes 3701556Srgrimes fclose(efp); 3711556Srgrimes editcmd = stalloc(strlen(editor) + strlen(editfile) + 2); 3721556Srgrimes sprintf(editcmd, "%s %s", editor, editfile); 373193169Sstefanf evalstring(editcmd, 0); /* XXX - should use no JC command */ 3741556Srgrimes INTON; 3751556Srgrimes readcmdfile(editfile); /* XXX - should read back - quick tst */ 3761556Srgrimes unlink(editfile); 3771556Srgrimes } 3788855Srgrimes 3791556Srgrimes if (lflg == 0 && active > 0) 3801556Srgrimes --active; 3811556Srgrimes if (displayhist) 3821556Srgrimes displayhist = 0; 38317987Speter return 0; 3841556Srgrimes} 3851556Srgrimes 3861556SrgrimesSTATIC char * 38790111Simpfc_replace(const char *s, char *p, char *r) 3881556Srgrimes{ 3891556Srgrimes char *dest; 3901556Srgrimes int plen = strlen(p); 3911556Srgrimes 3921556Srgrimes STARTSTACKSTR(dest); 3931556Srgrimes while (*s) { 3941556Srgrimes if (*s == *p && strncmp(s, p, plen) == 0) { 3951556Srgrimes while (*r) 3961556Srgrimes STPUTC(*r++, dest); 3971556Srgrimes s += plen; 3981556Srgrimes *p = '\0'; /* so no more matches */ 3991556Srgrimes } else 4001556Srgrimes STPUTC(*s++, dest); 4011556Srgrimes } 4021556Srgrimes STACKSTRNUL(dest); 4031556Srgrimes dest = grabstackstr(dest); 4041556Srgrimes 4051556Srgrimes return (dest); 4061556Srgrimes} 4071556Srgrimes 40817987Speterint 40990111Simpnot_fcnumber(char *s) 4101556Srgrimes{ 41120425Ssteve if (s == NULL) 41225224Ssteve return (0); 41320425Ssteve if (*s == '-') 41420425Ssteve s++; 4151556Srgrimes return (!is_number(s)); 4161556Srgrimes} 4171556Srgrimes 41817987Speterint 41990111Simpstr_to_event(char *str, int last) 4201556Srgrimes{ 42184261Sobrien HistEvent he; 4221556Srgrimes char *s = str; 4231556Srgrimes int relative = 0; 42484261Sobrien int i, retval; 4251556Srgrimes 42684261Sobrien retval = history(hist, &he, H_FIRST); 4271556Srgrimes switch (*s) { 4281556Srgrimes case '-': 4291556Srgrimes relative = 1; 4301556Srgrimes /*FALLTHROUGH*/ 4311556Srgrimes case '+': 4321556Srgrimes s++; 4331556Srgrimes } 4341556Srgrimes if (is_number(s)) { 4351556Srgrimes i = atoi(s); 4361556Srgrimes if (relative) { 43784261Sobrien while (retval != -1 && i--) { 43884261Sobrien retval = history(hist, &he, H_NEXT); 4391556Srgrimes } 44084261Sobrien if (retval == -1) 44184261Sobrien retval = history(hist, &he, H_LAST); 4421556Srgrimes } else { 44384261Sobrien retval = history(hist, &he, H_NEXT_EVENT, i); 44484261Sobrien if (retval == -1) { 4451556Srgrimes /* 4461556Srgrimes * the notion of first and last is 4471556Srgrimes * backwards to that of the history package 4481556Srgrimes */ 44984261Sobrien retval = history(hist, &he, last ? H_FIRST : H_LAST); 4501556Srgrimes } 4511556Srgrimes } 45284261Sobrien if (retval == -1) 4531556Srgrimes error("history number %s not found (internal error)", 4541556Srgrimes str); 4551556Srgrimes } else { 4561556Srgrimes /* 4578855Srgrimes * pattern 4581556Srgrimes */ 45984261Sobrien retval = history(hist, &he, H_PREV_STR, str); 46084261Sobrien if (retval == -1) 4611556Srgrimes error("history pattern not found: %s", str); 4621556Srgrimes } 46384261Sobrien return (he.num); 4641556Srgrimes} 465100565Stjr 466100565Stjrint 467100565Stjrbindcmd(int argc, char **argv) 468100565Stjr{ 469100565Stjr 470100565Stjr if (el == NULL) 471100565Stjr error("line editing is disabled"); 472148974Sstefanf return (el_parse(el, argc, (const char **)argv)); 473100565Stjr} 474100565Stjr 47525224Ssteve#else 47625224Ssteve#include "error.h" 47725224Ssteve 47825224Ssteveint 47990111Simphistcmd(int argc, char **argv) 48025224Ssteve{ 48125224Ssteve 48225224Ssteve error("not compiled with history support"); 48325224Ssteve /*NOTREACHED*/ 48425224Ssteve return (0); 48525224Ssteve} 486100565Stjr 487100565Stjrint 488100565Stjrbindcmd(int argc, char **argv) 489100565Stjr{ 490100565Stjr 491100565Stjr error("not compiled with line editing support"); 492100565Stjr return (0); 493100565Stjr} 49425224Ssteve#endif 495