histedit.c revision 209221
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 209221 2010-06-15 21:58:40Z 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 */ 101208755Sjilles char *term; 102208755Sjilles 1031556Srgrimes INTOFF; 1041556Srgrimes if (el_in == NULL) 1051556Srgrimes el_in = fdopen(0, "r"); 10684261Sobrien if (el_err == NULL) 10784261Sobrien el_err = fdopen(1, "w"); 1081556Srgrimes if (el_out == NULL) 1091556Srgrimes el_out = fdopen(2, "w"); 11084261Sobrien if (el_in == NULL || el_err == NULL || el_out == NULL) 1111556Srgrimes goto bad; 112208755Sjilles term = lookupvar("TERM"); 113208755Sjilles if (term) 114208755Sjilles setenv("TERM", term, 1); 115208755Sjilles else 116208755Sjilles unsetenv("TERM"); 11784261Sobrien el = el_init(arg0, el_in, el_out, el_err); 1181556Srgrimes if (el != NULL) { 1191556Srgrimes if (hist) 1201556Srgrimes el_set(el, EL_HIST, history, hist); 1211556Srgrimes el_set(el, EL_PROMPT, getprompt); 122209221Sjilles el_set(el, EL_ADDFN, "sh-complete", 123209221Sjilles "Filename completion", 124209221Sjilles _el_fn_sh_complete); 1251556Srgrimes } else { 1261556Srgrimesbad: 127199629Sjilles out2fmt_flush("sh: can't initialize editing\n"); 1281556Srgrimes } 1291556Srgrimes INTON; 1301556Srgrimes } else if (!editing && el) { 1311556Srgrimes INTOFF; 1321556Srgrimes el_end(el); 1331556Srgrimes el = NULL; 1341556Srgrimes INTON; 1351556Srgrimes } 1361556Srgrimes if (el) { 1371556Srgrimes if (Vflag) 1381556Srgrimes el_set(el, EL_EDITOR, "vi"); 1391556Srgrimes else if (Eflag) 1401556Srgrimes el_set(el, EL_EDITOR, "emacs"); 141209221Sjilles el_set(el, EL_BIND, "^I", "sh-complete", NULL); 142100568Stjr el_source(el, NULL); 1431556Srgrimes } 1441556Srgrimes } else { 1451556Srgrimes INTOFF; 1461556Srgrimes if (el) { /* no editing if not interactive */ 1471556Srgrimes el_end(el); 1481556Srgrimes el = NULL; 1491556Srgrimes } 1501556Srgrimes if (hist) { 1511556Srgrimes history_end(hist); 1521556Srgrimes hist = NULL; 1531556Srgrimes } 1541556Srgrimes INTON; 1551556Srgrimes } 1561556Srgrimes} 1571556Srgrimes 15817987Speter 15917987Spetervoid 16020425Sstevesethistsize(hs) 16120425Ssteve const char *hs; 16217987Speter{ 1631556Srgrimes int histsize; 16484261Sobrien HistEvent he; 1651556Srgrimes 1661556Srgrimes if (hist != NULL) { 16720425Ssteve if (hs == NULL || *hs == '\0' || 16820425Ssteve (histsize = atoi(hs)) < 0) 1691556Srgrimes histsize = 100; 170151471Sstefanf history(hist, &he, H_SETSIZE, histsize); 1711556Srgrimes } 1721556Srgrimes} 1731556Srgrimes 174208755Sjillesvoid 175208755Sjillessetterm(const char *term) 176208755Sjilles{ 177208755Sjilles if (rootshell && el != NULL && term != NULL) 178208755Sjilles el_set(el, EL_TERMINAL, term); 179208755Sjilles} 180208755Sjilles 18117987Speterint 18290111Simphistcmd(int argc, char **argv) 1831556Srgrimes{ 1841556Srgrimes int ch; 185201053Sjilles const char *editor = NULL; 18684261Sobrien HistEvent he; 1871556Srgrimes int lflg = 0, nflg = 0, rflg = 0, sflg = 0; 18884261Sobrien int i, retval; 189201053Sjilles const char *firststr, *laststr; 1901556Srgrimes int first, last, direction; 191201053Sjilles char *pat = NULL, *repl = NULL; 1921556Srgrimes static int active = 0; 1931556Srgrimes struct jmploc jmploc; 194194765Sjilles struct jmploc *savehandler; 195194765Sjilles char editfilestr[PATH_MAX]; 196194765Sjilles char *volatile editfile; 197201053Sjilles FILE *efp = NULL; 19897730Stjr int oldhistnum; 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 */ 207100663Stjr opterr = 0; 2081556Srgrimes while (not_fcnumber(argv[optind]) && 20924348Simp (ch = getopt(argc, argv, ":e:lnrs")) != -1) 2101556Srgrimes switch ((char)ch) { 2111556Srgrimes case 'e': 21297731Stjr editor = optarg; 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 case ':': 2271556Srgrimes error("option -%c expects argument", optopt); 2281556Srgrimes case '?': 2291556Srgrimes default: 2301556Srgrimes error("unknown option: -%c", optopt); 2311556Srgrimes } 2321556Srgrimes argc -= optind, argv += optind; 2331556Srgrimes 2341556Srgrimes /* 2351556Srgrimes * If executing... 2361556Srgrimes */ 2371556Srgrimes if (lflg == 0 || editor || sflg) { 2381556Srgrimes lflg = 0; /* ignore */ 239194765Sjilles editfile = NULL; 2401556Srgrimes /* 2411556Srgrimes * Catch interrupts to reset active counter and 2421556Srgrimes * cleanup temp files. 2431556Srgrimes */ 244194765Sjilles savehandler = handler; 2451556Srgrimes if (setjmp(jmploc.loc)) { 2461556Srgrimes active = 0; 247194765Sjilles if (editfile) 2481556Srgrimes unlink(editfile); 2491556Srgrimes handler = savehandler; 2501556Srgrimes longjmp(handler->loc, 1); 2511556Srgrimes } 2521556Srgrimes handler = &jmploc; 2531556Srgrimes if (++active > MAXHISTLOOPS) { 2541556Srgrimes active = 0; 2551556Srgrimes displayhist = 0; 2561556Srgrimes error("called recursively too many times"); 2571556Srgrimes } 2581556Srgrimes /* 2591556Srgrimes * Set editor. 2601556Srgrimes */ 2611556Srgrimes if (sflg == 0) { 2621556Srgrimes if (editor == NULL && 2631556Srgrimes (editor = bltinlookup("FCEDIT", 1)) == NULL && 2641556Srgrimes (editor = bltinlookup("EDITOR", 1)) == NULL) 2651556Srgrimes editor = DEFEDITOR; 2661556Srgrimes if (editor[0] == '-' && editor[1] == '\0') { 2671556Srgrimes sflg = 1; /* no edit */ 2681556Srgrimes editor = NULL; 2691556Srgrimes } 2701556Srgrimes } 2711556Srgrimes } 2721556Srgrimes 2731556Srgrimes /* 2741556Srgrimes * If executing, parse [old=new] now 2751556Srgrimes */ 2768855Srgrimes if (lflg == 0 && argc > 0 && 2771556Srgrimes ((repl = strchr(argv[0], '=')) != NULL)) { 2781556Srgrimes pat = argv[0]; 2791556Srgrimes *repl++ = '\0'; 2801556Srgrimes argc--, argv++; 2811556Srgrimes } 2821556Srgrimes /* 2831556Srgrimes * determine [first] and [last] 2841556Srgrimes */ 2851556Srgrimes switch (argc) { 2861556Srgrimes case 0: 2871556Srgrimes firststr = lflg ? "-16" : "-1"; 2881556Srgrimes laststr = "-1"; 2891556Srgrimes break; 2901556Srgrimes case 1: 2911556Srgrimes firststr = argv[0]; 2921556Srgrimes laststr = lflg ? "-1" : argv[0]; 2931556Srgrimes break; 2941556Srgrimes case 2: 2951556Srgrimes firststr = argv[0]; 2961556Srgrimes laststr = argv[1]; 2971556Srgrimes break; 2981556Srgrimes default: 2991556Srgrimes error("too many args"); 3001556Srgrimes } 3011556Srgrimes /* 3021556Srgrimes * Turn into event numbers. 3031556Srgrimes */ 3041556Srgrimes first = str_to_event(firststr, 0); 3051556Srgrimes last = str_to_event(laststr, 1); 3061556Srgrimes 3071556Srgrimes if (rflg) { 3081556Srgrimes i = last; 3091556Srgrimes last = first; 3101556Srgrimes first = i; 3111556Srgrimes } 3121556Srgrimes /* 3131556Srgrimes * XXX - this should not depend on the event numbers 3148855Srgrimes * always increasing. Add sequence numbers or offset 3151556Srgrimes * to the history element in next (diskbased) release. 3161556Srgrimes */ 3171556Srgrimes direction = first < last ? H_PREV : H_NEXT; 3181556Srgrimes 3191556Srgrimes /* 3201556Srgrimes * If editing, grab a temp file. 3211556Srgrimes */ 3221556Srgrimes if (editor) { 3231556Srgrimes int fd; 3241556Srgrimes INTOFF; /* easier */ 325194765Sjilles sprintf(editfilestr, "%s/_shXXXXXX", _PATH_TMP); 326194765Sjilles if ((fd = mkstemp(editfilestr)) < 0) 3271556Srgrimes error("can't create temporary file %s", editfile); 328194765Sjilles editfile = editfilestr; 3291556Srgrimes if ((efp = fdopen(fd, "w")) == NULL) { 3301556Srgrimes close(fd); 33118016Speter error("can't allocate stdio buffer for temp"); 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 */ 34384261Sobrien history(hist, &he, H_FIRST); 34484261Sobrien retval = history(hist, &he, H_NEXT_EVENT, first); 34584261Sobrien for (;retval != -1; retval = history(hist, &he, direction)) { 3461556Srgrimes if (lflg) { 3471556Srgrimes if (!nflg) 34884261Sobrien out1fmt("%5d ", he.num); 34984261Sobrien out1str(he.str); 3501556Srgrimes } else { 3518855Srgrimes char *s = pat ? 35284261Sobrien fc_replace(he.str, pat, repl) : (char *)he.str; 3531556Srgrimes 3541556Srgrimes if (sflg) { 3551556Srgrimes if (displayhist) { 3561556Srgrimes out2str(s); 357199629Sjilles flushout(out2); 3581556Srgrimes } 359193169Sstefanf evalstring(s, 0); 3601556Srgrimes if (displayhist && hist) { 3611556Srgrimes /* 3628855Srgrimes * XXX what about recursive and 3631556Srgrimes * relative histnums. 3641556Srgrimes */ 36597730Stjr oldhistnum = he.num; 36684261Sobrien history(hist, &he, H_ENTER, s); 36797730Stjr /* 36897730Stjr * XXX H_ENTER moves the internal 36997730Stjr * cursor, set it back to the current 37097730Stjr * entry. 37197730Stjr */ 37297730Stjr retval = history(hist, &he, 37397730Stjr H_NEXT_EVENT, oldhistnum); 3741556Srgrimes } 3751556Srgrimes } else 3761556Srgrimes fputs(s, efp); 3771556Srgrimes } 3781556Srgrimes /* 379160964Syar * At end? (if we were to lose last, we'd sure be 3801556Srgrimes * messed up). 3811556Srgrimes */ 38284261Sobrien if (he.num == last) 3831556Srgrimes break; 3841556Srgrimes } 3851556Srgrimes if (editor) { 3861556Srgrimes char *editcmd; 3871556Srgrimes 3881556Srgrimes fclose(efp); 3891556Srgrimes editcmd = stalloc(strlen(editor) + strlen(editfile) + 2); 3901556Srgrimes sprintf(editcmd, "%s %s", editor, editfile); 391193169Sstefanf evalstring(editcmd, 0); /* XXX - should use no JC command */ 3921556Srgrimes INTON; 3931556Srgrimes readcmdfile(editfile); /* XXX - should read back - quick tst */ 3941556Srgrimes unlink(editfile); 3951556Srgrimes } 3968855Srgrimes 3971556Srgrimes if (lflg == 0 && active > 0) 3981556Srgrimes --active; 3991556Srgrimes if (displayhist) 4001556Srgrimes displayhist = 0; 40117987Speter return 0; 4021556Srgrimes} 4031556Srgrimes 4041556SrgrimesSTATIC char * 40590111Simpfc_replace(const char *s, char *p, char *r) 4061556Srgrimes{ 4071556Srgrimes char *dest; 4081556Srgrimes int plen = strlen(p); 4091556Srgrimes 4101556Srgrimes STARTSTACKSTR(dest); 4111556Srgrimes while (*s) { 4121556Srgrimes if (*s == *p && strncmp(s, p, plen) == 0) { 4131556Srgrimes while (*r) 4141556Srgrimes STPUTC(*r++, dest); 4151556Srgrimes s += plen; 4161556Srgrimes *p = '\0'; /* so no more matches */ 4171556Srgrimes } else 4181556Srgrimes STPUTC(*s++, dest); 4191556Srgrimes } 4201556Srgrimes STACKSTRNUL(dest); 4211556Srgrimes dest = grabstackstr(dest); 4221556Srgrimes 4231556Srgrimes return (dest); 4241556Srgrimes} 4251556Srgrimes 42617987Speterint 427200956Sjillesnot_fcnumber(const char *s) 4281556Srgrimes{ 42920425Ssteve if (s == NULL) 43025224Ssteve return (0); 43120425Ssteve if (*s == '-') 43220425Ssteve s++; 4331556Srgrimes return (!is_number(s)); 4341556Srgrimes} 4351556Srgrimes 43617987Speterint 437200956Sjillesstr_to_event(const char *str, int last) 4381556Srgrimes{ 43984261Sobrien HistEvent he; 440200956Sjilles const char *s = str; 4411556Srgrimes int relative = 0; 44284261Sobrien int i, retval; 4431556Srgrimes 44484261Sobrien retval = history(hist, &he, H_FIRST); 4451556Srgrimes switch (*s) { 4461556Srgrimes case '-': 4471556Srgrimes relative = 1; 4481556Srgrimes /*FALLTHROUGH*/ 4491556Srgrimes case '+': 4501556Srgrimes s++; 4511556Srgrimes } 4521556Srgrimes if (is_number(s)) { 4531556Srgrimes i = atoi(s); 4541556Srgrimes if (relative) { 45584261Sobrien while (retval != -1 && i--) { 45684261Sobrien retval = history(hist, &he, H_NEXT); 4571556Srgrimes } 45884261Sobrien if (retval == -1) 45984261Sobrien retval = history(hist, &he, H_LAST); 4601556Srgrimes } else { 46184261Sobrien retval = history(hist, &he, H_NEXT_EVENT, i); 46284261Sobrien if (retval == -1) { 4631556Srgrimes /* 4641556Srgrimes * the notion of first and last is 4651556Srgrimes * backwards to that of the history package 4661556Srgrimes */ 46784261Sobrien retval = history(hist, &he, last ? H_FIRST : H_LAST); 4681556Srgrimes } 4691556Srgrimes } 47084261Sobrien if (retval == -1) 4711556Srgrimes error("history number %s not found (internal error)", 4721556Srgrimes str); 4731556Srgrimes } else { 4741556Srgrimes /* 4758855Srgrimes * pattern 4761556Srgrimes */ 47784261Sobrien retval = history(hist, &he, H_PREV_STR, str); 47884261Sobrien if (retval == -1) 4791556Srgrimes error("history pattern not found: %s", str); 4801556Srgrimes } 48184261Sobrien return (he.num); 4821556Srgrimes} 483100565Stjr 484100565Stjrint 485100565Stjrbindcmd(int argc, char **argv) 486100565Stjr{ 487100565Stjr 488100565Stjr if (el == NULL) 489100565Stjr error("line editing is disabled"); 490148974Sstefanf return (el_parse(el, argc, (const char **)argv)); 491100565Stjr} 492100565Stjr 49325224Ssteve#else 49425224Ssteve#include "error.h" 49525224Ssteve 49625224Ssteveint 49790111Simphistcmd(int argc, char **argv) 49825224Ssteve{ 49925224Ssteve 50025224Ssteve error("not compiled with history support"); 50125224Ssteve /*NOTREACHED*/ 50225224Ssteve return (0); 50325224Ssteve} 504100565Stjr 505100565Stjrint 506100565Stjrbindcmd(int argc, char **argv) 507100565Stjr{ 508100565Stjr 509100565Stjr error("not compiled with line editing support"); 510100565Stjr return (0); 511100565Stjr} 51225224Ssteve#endif 513