histedit.c revision 17987
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 * 3617987Speter * $Id: histedit.c,v 1.4 1995/05/30 00:07:14 rgrimes Exp $ 371556Srgrimes */ 381556Srgrimes 391556Srgrimes#ifndef lint 4017987Speterstatic char 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" 6017987Speter#endif 611556Srgrimes#include "error.h" 6217987Speter#include "eval.h" 631556Srgrimes#include "memalloc.h" 641556Srgrimes 651556Srgrimes#define MAXHISTLOOPS 4 /* max recursions through fc */ 661556Srgrimes#define DEFEDITOR "ed" /* default editor *should* be $EDITOR */ 671556Srgrimes 681556SrgrimesHistory *hist; /* history cookie */ 691556SrgrimesEditLine *el; /* editline cookie */ 701556Srgrimesint displayhist; 711556Srgrimesstatic FILE *el_in, *el_out; 721556Srgrimes 731556SrgrimesSTATIC char *fc_replace __P((const char *, char *, char *)); 741556Srgrimes 751556Srgrimes/* 761556Srgrimes * Set history and editing status. Called whenever the status may 771556Srgrimes * have changed (figures out what to do). 781556Srgrimes */ 7917987Spetervoid 8017987Speterhistedit() 8117987Speter{ 821556Srgrimes 831556Srgrimes#define editing (Eflag || Vflag) 841556Srgrimes 851556Srgrimes if (iflag) { 861556Srgrimes if (!hist) { 871556Srgrimes /* 881556Srgrimes * turn history on 891556Srgrimes */ 901556Srgrimes INTOFF; 911556Srgrimes hist = history_init(); 921556Srgrimes INTON; 931556Srgrimes 941556Srgrimes if (hist != NULL) 951556Srgrimes sethistsize(); 961556Srgrimes else 971556Srgrimes out2str("sh: can't initialize history\n"); 981556Srgrimes } 991556Srgrimes if (editing && !el && isatty(0)) { /* && isatty(2) ??? */ 1001556Srgrimes /* 1011556Srgrimes * turn editing on 1021556Srgrimes */ 1031556Srgrimes INTOFF; 1041556Srgrimes if (el_in == NULL) 1051556Srgrimes el_in = fdopen(0, "r"); 1061556Srgrimes if (el_out == NULL) 1071556Srgrimes el_out = fdopen(2, "w"); 1081556Srgrimes if (el_in == NULL || el_out == NULL) 1091556Srgrimes goto bad; 1101556Srgrimes el = el_init(arg0, el_in, el_out); 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"); 1311556Srgrimes } 1321556Srgrimes } else { 1331556Srgrimes INTOFF; 1341556Srgrimes if (el) { /* no editing if not interactive */ 1351556Srgrimes el_end(el); 1361556Srgrimes el = NULL; 1371556Srgrimes } 1381556Srgrimes if (hist) { 1391556Srgrimes history_end(hist); 1401556Srgrimes hist = NULL; 1411556Srgrimes } 1421556Srgrimes INTON; 1431556Srgrimes } 1441556Srgrimes} 1451556Srgrimes 14617987Speter 14717987Spetervoid 14817987Spetersethistsize() 14917987Speter{ 1501556Srgrimes char *cp; 1511556Srgrimes int histsize; 1521556Srgrimes 1531556Srgrimes if (hist != NULL) { 1541556Srgrimes cp = lookupvar("HISTSIZE"); 1558855Srgrimes if (cp == NULL || *cp == '\0' || 1561556Srgrimes (histsize = atoi(cp)) < 0) 1571556Srgrimes histsize = 100; 1581556Srgrimes history(hist, H_EVENT, histsize); 1591556Srgrimes } 1601556Srgrimes} 1611556Srgrimes 1621556Srgrimes/* 1631556Srgrimes * This command is provided since POSIX decided to standardize 1641556Srgrimes * the Korn shell fc command. Oh well... 1651556Srgrimes */ 16617987Speterint 1671556Srgrimeshistcmd(argc, argv) 16817987Speter int argc; 16917987Speter char **argv; 1701556Srgrimes{ 1711556Srgrimes extern char *optarg; 1721556Srgrimes extern int optind, optopt, optreset; 1731556Srgrimes int ch; 1741556Srgrimes char *editor = NULL; 1751556Srgrimes const HistEvent *he; 1761556Srgrimes int lflg = 0, nflg = 0, rflg = 0, sflg = 0; 1771556Srgrimes int i; 1781556Srgrimes char *firststr, *laststr; 1791556Srgrimes int first, last, direction; 1801556Srgrimes char *pat = NULL, *repl; /* ksh "fc old=new" crap */ 1811556Srgrimes static int active = 0; 1821556Srgrimes struct jmploc jmploc; 1831556Srgrimes struct jmploc *volatile savehandler; 1841556Srgrimes char editfile[MAXPATHLEN + 1]; 1851556Srgrimes FILE *efp; 18617987Speter#ifdef __GNUC__ 18717987Speter /* Avoid longjmp clobbering */ 18817987Speter (void) &editor; 18917987Speter (void) &lflg; 19017987Speter (void) &nflg; 19117987Speter (void) &rflg; 19217987Speter (void) &sflg; 19317987Speter (void) &firststr; 19417987Speter (void) &laststr; 19517987Speter (void) &pat; 19617987Speter (void) &repl; 19717987Speter (void) &efp; 19817987Speter (void) &argc; 19917987Speter (void) &argv; 20017987Speter#endif 2011556Srgrimes 2021556Srgrimes if (hist == NULL) 2031556Srgrimes error("history not active"); 2048855Srgrimes 2051556Srgrimes if (argc == 1) 2061556Srgrimes error("missing history argument"); 2071556Srgrimes 2081556Srgrimes optreset = 1; optind = 1; /* initialize getopt */ 2091556Srgrimes while (not_fcnumber(argv[optind]) && 2101556Srgrimes (ch = getopt(argc, argv, ":e:lnrs")) != EOF) 2111556Srgrimes switch ((char)ch) { 2121556Srgrimes case 'e': 2131556Srgrimes editor = optarg; 2141556Srgrimes break; 2151556Srgrimes case 'l': 2161556Srgrimes lflg = 1; 2171556Srgrimes break; 2181556Srgrimes case 'n': 2191556Srgrimes nflg = 1; 2201556Srgrimes break; 2211556Srgrimes case 'r': 2221556Srgrimes rflg = 1; 2231556Srgrimes break; 2241556Srgrimes case 's': 2251556Srgrimes sflg = 1; 2261556Srgrimes break; 2271556Srgrimes case ':': 2281556Srgrimes error("option -%c expects argument", optopt); 2291556Srgrimes case '?': 2301556Srgrimes default: 2311556Srgrimes error("unknown option: -%c", optopt); 2321556Srgrimes } 2331556Srgrimes argc -= optind, argv += optind; 2341556Srgrimes 2351556Srgrimes /* 2361556Srgrimes * If executing... 2371556Srgrimes */ 2381556Srgrimes if (lflg == 0 || editor || sflg) { 2391556Srgrimes lflg = 0; /* ignore */ 2401556Srgrimes editfile[0] = '\0'; 2411556Srgrimes /* 2421556Srgrimes * Catch interrupts to reset active counter and 2431556Srgrimes * cleanup temp files. 2441556Srgrimes */ 2451556Srgrimes if (setjmp(jmploc.loc)) { 2461556Srgrimes active = 0; 2471556Srgrimes if (*editfile) 2481556Srgrimes unlink(editfile); 2491556Srgrimes handler = savehandler; 2501556Srgrimes longjmp(handler->loc, 1); 2511556Srgrimes } 2521556Srgrimes savehandler = handler; 2531556Srgrimes handler = &jmploc; 2541556Srgrimes if (++active > MAXHISTLOOPS) { 2551556Srgrimes active = 0; 2561556Srgrimes displayhist = 0; 2571556Srgrimes error("called recursively too many times"); 2581556Srgrimes } 2591556Srgrimes /* 2601556Srgrimes * Set editor. 2611556Srgrimes */ 2621556Srgrimes if (sflg == 0) { 2631556Srgrimes if (editor == NULL && 2641556Srgrimes (editor = bltinlookup("FCEDIT", 1)) == NULL && 2651556Srgrimes (editor = bltinlookup("EDITOR", 1)) == NULL) 2661556Srgrimes editor = DEFEDITOR; 2671556Srgrimes if (editor[0] == '-' && editor[1] == '\0') { 2681556Srgrimes sflg = 1; /* no edit */ 2691556Srgrimes editor = NULL; 2701556Srgrimes } 2711556Srgrimes } 2721556Srgrimes } 2731556Srgrimes 2741556Srgrimes /* 2751556Srgrimes * If executing, parse [old=new] now 2761556Srgrimes */ 2778855Srgrimes if (lflg == 0 && argc > 0 && 2781556Srgrimes ((repl = strchr(argv[0], '=')) != NULL)) { 2791556Srgrimes pat = argv[0]; 2801556Srgrimes *repl++ = '\0'; 2811556Srgrimes argc--, argv++; 2821556Srgrimes } 2831556Srgrimes /* 2841556Srgrimes * determine [first] and [last] 2851556Srgrimes */ 2861556Srgrimes switch (argc) { 2871556Srgrimes case 0: 2881556Srgrimes firststr = lflg ? "-16" : "-1"; 2891556Srgrimes laststr = "-1"; 2901556Srgrimes break; 2911556Srgrimes case 1: 2921556Srgrimes firststr = argv[0]; 2931556Srgrimes laststr = lflg ? "-1" : argv[0]; 2941556Srgrimes break; 2951556Srgrimes case 2: 2961556Srgrimes firststr = argv[0]; 2971556Srgrimes laststr = argv[1]; 2981556Srgrimes break; 2991556Srgrimes default: 3001556Srgrimes error("too many args"); 3011556Srgrimes } 3021556Srgrimes /* 3031556Srgrimes * Turn into event numbers. 3041556Srgrimes */ 3051556Srgrimes first = str_to_event(firststr, 0); 3061556Srgrimes last = str_to_event(laststr, 1); 3071556Srgrimes 3081556Srgrimes if (rflg) { 3091556Srgrimes i = last; 3101556Srgrimes last = first; 3111556Srgrimes first = i; 3121556Srgrimes } 3131556Srgrimes /* 3141556Srgrimes * XXX - this should not depend on the event numbers 3158855Srgrimes * always increasing. Add sequence numbers or offset 3161556Srgrimes * to the history element in next (diskbased) release. 3171556Srgrimes */ 3181556Srgrimes direction = first < last ? H_PREV : H_NEXT; 3191556Srgrimes 3201556Srgrimes /* 3211556Srgrimes * If editing, grab a temp file. 3221556Srgrimes */ 3231556Srgrimes if (editor) { 3241556Srgrimes int fd; 3251556Srgrimes INTOFF; /* easier */ 3261556Srgrimes sprintf(editfile, "%s/_shXXXXXX", _PATH_TMP); 3271556Srgrimes if ((fd = mkstemp(editfile)) < 0) 3281556Srgrimes error("can't create temporary file %s", editfile); 3291556Srgrimes if ((efp = fdopen(fd, "w")) == NULL) { 3301556Srgrimes close(fd); 3311556Srgrimes error("can't allocate stdio buffer for temp\n"); 3321556Srgrimes } 3331556Srgrimes } 3341556Srgrimes 3351556Srgrimes /* 3361556Srgrimes * Loop through selected history events. If listing or executing, 3371556Srgrimes * do it now. Otherwise, put into temp file and call the editor 3381556Srgrimes * after. 3391556Srgrimes * 3401556Srgrimes * The history interface needs rethinking, as the following 3411556Srgrimes * convolutions will demonstrate. 3421556Srgrimes */ 3431556Srgrimes history(hist, H_FIRST); 3441556Srgrimes he = history(hist, H_NEXT_EVENT, first); 3451556Srgrimes for (;he != NULL; he = history(hist, direction)) { 3461556Srgrimes if (lflg) { 3471556Srgrimes if (!nflg) 3481556Srgrimes out1fmt("%5d ", he->num); 3491556Srgrimes out1str(he->str); 3501556Srgrimes } else { 3518855Srgrimes char *s = pat ? 3521556Srgrimes fc_replace(he->str, pat, repl) : (char *)he->str; 3531556Srgrimes 3541556Srgrimes if (sflg) { 3551556Srgrimes if (displayhist) { 3561556Srgrimes out2str(s); 3571556Srgrimes } 3581556Srgrimes evalstring(s); 3591556Srgrimes if (displayhist && hist) { 3601556Srgrimes /* 3618855Srgrimes * XXX what about recursive and 3621556Srgrimes * relative histnums. 3631556Srgrimes */ 3641556Srgrimes history(hist, H_ENTER, s); 3651556Srgrimes } 3661556Srgrimes } else 3671556Srgrimes fputs(s, efp); 3681556Srgrimes } 3691556Srgrimes /* 3701556Srgrimes * At end? (if we were to loose last, we'd sure be 3711556Srgrimes * messed up). 3721556Srgrimes */ 3731556Srgrimes if (he->num == last) 3741556Srgrimes break; 3751556Srgrimes } 3761556Srgrimes if (editor) { 3771556Srgrimes char *editcmd; 3781556Srgrimes 3791556Srgrimes fclose(efp); 3801556Srgrimes editcmd = stalloc(strlen(editor) + strlen(editfile) + 2); 3811556Srgrimes sprintf(editcmd, "%s %s", editor, editfile); 3821556Srgrimes evalstring(editcmd); /* XXX - should use no JC command */ 3831556Srgrimes INTON; 3841556Srgrimes readcmdfile(editfile); /* XXX - should read back - quick tst */ 3851556Srgrimes unlink(editfile); 3861556Srgrimes } 3878855Srgrimes 3881556Srgrimes if (lflg == 0 && active > 0) 3891556Srgrimes --active; 3901556Srgrimes if (displayhist) 3911556Srgrimes displayhist = 0; 39217987Speter return 0; 3931556Srgrimes} 3941556Srgrimes 3951556SrgrimesSTATIC char * 3961556Srgrimesfc_replace(s, p, r) 3971556Srgrimes const char *s; 3981556Srgrimes char *p, *r; 3991556Srgrimes{ 4001556Srgrimes char *dest; 4011556Srgrimes int plen = strlen(p); 4021556Srgrimes 4031556Srgrimes STARTSTACKSTR(dest); 4041556Srgrimes while (*s) { 4051556Srgrimes if (*s == *p && strncmp(s, p, plen) == 0) { 4061556Srgrimes while (*r) 4071556Srgrimes STPUTC(*r++, dest); 4081556Srgrimes s += plen; 4091556Srgrimes *p = '\0'; /* so no more matches */ 4101556Srgrimes } else 4111556Srgrimes STPUTC(*s++, dest); 4121556Srgrimes } 4131556Srgrimes STACKSTRNUL(dest); 4141556Srgrimes dest = grabstackstr(dest); 4151556Srgrimes 4161556Srgrimes return (dest); 4171556Srgrimes} 4181556Srgrimes 41917987Speterint 4201556Srgrimesnot_fcnumber(s) 4211556Srgrimes char *s; 4221556Srgrimes{ 4238289Sdg if (s == NULL) { 4248289Sdg /* NULL is not a fc_number */ 4258289Sdg return (1); 4268289Sdg } 4271556Srgrimes if (*s == '-') 4281556Srgrimes s++; 4291556Srgrimes return (!is_number(s)); 4301556Srgrimes} 4311556Srgrimes 43217987Speterint 4331556Srgrimesstr_to_event(str, last) 4341556Srgrimes char *str; 4351556Srgrimes int last; 4361556Srgrimes{ 4371556Srgrimes const HistEvent *he; 4381556Srgrimes char *s = str; 4391556Srgrimes int relative = 0; 44017987Speter int i; 4411556Srgrimes 4421556Srgrimes he = history(hist, H_FIRST); 4431556Srgrimes switch (*s) { 4441556Srgrimes case '-': 4451556Srgrimes relative = 1; 4461556Srgrimes /*FALLTHROUGH*/ 4471556Srgrimes case '+': 4481556Srgrimes s++; 4491556Srgrimes } 4501556Srgrimes if (is_number(s)) { 4511556Srgrimes i = atoi(s); 4521556Srgrimes if (relative) { 4531556Srgrimes while (he != NULL && i--) { 4541556Srgrimes he = history(hist, H_NEXT); 4551556Srgrimes } 4561556Srgrimes if (he == NULL) 4571556Srgrimes he = history(hist, H_LAST); 4581556Srgrimes } else { 4591556Srgrimes he = history(hist, H_NEXT_EVENT, i); 4601556Srgrimes if (he == NULL) { 4611556Srgrimes /* 4621556Srgrimes * the notion of first and last is 4631556Srgrimes * backwards to that of the history package 4641556Srgrimes */ 4651556Srgrimes he = history(hist, last ? H_FIRST : H_LAST); 4661556Srgrimes } 4671556Srgrimes } 4681556Srgrimes if (he == NULL) 4691556Srgrimes error("history number %s not found (internal error)", 4701556Srgrimes str); 4711556Srgrimes } else { 4721556Srgrimes /* 4738855Srgrimes * pattern 4741556Srgrimes */ 4751556Srgrimes he = history(hist, H_PREV_STR, str); 4761556Srgrimes if (he == NULL) 4771556Srgrimes error("history pattern not found: %s", str); 4781556Srgrimes } 4791556Srgrimes return (he->num); 4801556Srgrimes} 481