histedit.c revision 213811
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 213811 2010-10-13 22:18:03Z obrien $"); 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 71213811Sobrienstatic 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); 171210736Sjilles history(hist, &he, H_SETUNIQUE, 1); 1721556Srgrimes } 1731556Srgrimes} 1741556Srgrimes 175208755Sjillesvoid 176208755Sjillessetterm(const char *term) 177208755Sjilles{ 178208755Sjilles if (rootshell && el != NULL && term != NULL) 179208755Sjilles el_set(el, EL_TERMINAL, term); 180208755Sjilles} 181208755Sjilles 18217987Speterint 18390111Simphistcmd(int argc, char **argv) 1841556Srgrimes{ 1851556Srgrimes int ch; 186201053Sjilles const char *editor = NULL; 18784261Sobrien HistEvent he; 1881556Srgrimes int lflg = 0, nflg = 0, rflg = 0, sflg = 0; 18984261Sobrien int i, retval; 190201053Sjilles const char *firststr, *laststr; 1911556Srgrimes int first, last, direction; 192201053Sjilles char *pat = NULL, *repl = NULL; 1931556Srgrimes static int active = 0; 1941556Srgrimes struct jmploc jmploc; 195194765Sjilles struct jmploc *savehandler; 196194765Sjilles char editfilestr[PATH_MAX]; 197194765Sjilles char *volatile editfile; 198201053Sjilles FILE *efp = NULL; 19997730Stjr int oldhistnum; 2001556Srgrimes 2011556Srgrimes if (hist == NULL) 2021556Srgrimes error("history not active"); 2038855Srgrimes 2041556Srgrimes if (argc == 1) 2051556Srgrimes error("missing history argument"); 2061556Srgrimes 2071556Srgrimes optreset = 1; optind = 1; /* initialize getopt */ 208100663Stjr opterr = 0; 2091556Srgrimes while (not_fcnumber(argv[optind]) && 21024348Simp (ch = getopt(argc, argv, ":e:lnrs")) != -1) 2111556Srgrimes switch ((char)ch) { 2121556Srgrimes case 'e': 21397731Stjr 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 */ 240194765Sjilles editfile = NULL; 2411556Srgrimes /* 2421556Srgrimes * Catch interrupts to reset active counter and 2431556Srgrimes * cleanup temp files. 2441556Srgrimes */ 245194765Sjilles savehandler = handler; 2461556Srgrimes if (setjmp(jmploc.loc)) { 2471556Srgrimes active = 0; 248194765Sjilles if (editfile) 2491556Srgrimes unlink(editfile); 2501556Srgrimes handler = savehandler; 2511556Srgrimes longjmp(handler->loc, 1); 2521556Srgrimes } 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 */ 326194765Sjilles sprintf(editfilestr, "%s/_shXXXXXX", _PATH_TMP); 327194765Sjilles if ((fd = mkstemp(editfilestr)) < 0) 3281556Srgrimes error("can't create temporary file %s", editfile); 329194765Sjilles editfile = editfilestr; 3301556Srgrimes if ((efp = fdopen(fd, "w")) == NULL) { 3311556Srgrimes close(fd); 33218016Speter error("can't allocate stdio buffer for temp"); 3331556Srgrimes } 3341556Srgrimes } 3351556Srgrimes 3361556Srgrimes /* 3371556Srgrimes * Loop through selected history events. If listing or executing, 3381556Srgrimes * do it now. Otherwise, put into temp file and call the editor 3391556Srgrimes * after. 3401556Srgrimes * 3411556Srgrimes * The history interface needs rethinking, as the following 3421556Srgrimes * convolutions will demonstrate. 3431556Srgrimes */ 34484261Sobrien history(hist, &he, H_FIRST); 34584261Sobrien retval = history(hist, &he, H_NEXT_EVENT, first); 34684261Sobrien for (;retval != -1; retval = history(hist, &he, direction)) { 3471556Srgrimes if (lflg) { 3481556Srgrimes if (!nflg) 34984261Sobrien out1fmt("%5d ", he.num); 35084261Sobrien out1str(he.str); 3511556Srgrimes } else { 3528855Srgrimes char *s = pat ? 35384261Sobrien fc_replace(he.str, pat, repl) : (char *)he.str; 3541556Srgrimes 3551556Srgrimes if (sflg) { 3561556Srgrimes if (displayhist) { 3571556Srgrimes out2str(s); 358199629Sjilles flushout(out2); 3591556Srgrimes } 360193169Sstefanf evalstring(s, 0); 3611556Srgrimes if (displayhist && hist) { 3621556Srgrimes /* 3638855Srgrimes * XXX what about recursive and 3641556Srgrimes * relative histnums. 3651556Srgrimes */ 36697730Stjr oldhistnum = he.num; 36784261Sobrien history(hist, &he, H_ENTER, s); 36897730Stjr /* 36997730Stjr * XXX H_ENTER moves the internal 37097730Stjr * cursor, set it back to the current 37197730Stjr * entry. 37297730Stjr */ 37397730Stjr retval = history(hist, &he, 37497730Stjr H_NEXT_EVENT, oldhistnum); 3751556Srgrimes } 3761556Srgrimes } else 3771556Srgrimes fputs(s, efp); 3781556Srgrimes } 3791556Srgrimes /* 380160964Syar * At end? (if we were to lose last, we'd sure be 3811556Srgrimes * messed up). 3821556Srgrimes */ 38384261Sobrien if (he.num == last) 3841556Srgrimes break; 3851556Srgrimes } 3861556Srgrimes if (editor) { 3871556Srgrimes char *editcmd; 3881556Srgrimes 3891556Srgrimes fclose(efp); 3901556Srgrimes editcmd = stalloc(strlen(editor) + strlen(editfile) + 2); 3911556Srgrimes sprintf(editcmd, "%s %s", editor, editfile); 392193169Sstefanf evalstring(editcmd, 0); /* XXX - should use no JC command */ 3931556Srgrimes INTON; 3941556Srgrimes readcmdfile(editfile); /* XXX - should read back - quick tst */ 3951556Srgrimes unlink(editfile); 3961556Srgrimes } 3978855Srgrimes 3981556Srgrimes if (lflg == 0 && active > 0) 3991556Srgrimes --active; 4001556Srgrimes if (displayhist) 4011556Srgrimes displayhist = 0; 40217987Speter return 0; 4031556Srgrimes} 4041556Srgrimes 405213811Sobrienstatic char * 40690111Simpfc_replace(const char *s, char *p, char *r) 4071556Srgrimes{ 4081556Srgrimes char *dest; 4091556Srgrimes int plen = strlen(p); 4101556Srgrimes 4111556Srgrimes STARTSTACKSTR(dest); 4121556Srgrimes while (*s) { 4131556Srgrimes if (*s == *p && strncmp(s, p, plen) == 0) { 4141556Srgrimes while (*r) 4151556Srgrimes STPUTC(*r++, dest); 4161556Srgrimes s += plen; 4171556Srgrimes *p = '\0'; /* so no more matches */ 4181556Srgrimes } else 4191556Srgrimes STPUTC(*s++, dest); 4201556Srgrimes } 4211556Srgrimes STACKSTRNUL(dest); 4221556Srgrimes dest = grabstackstr(dest); 4231556Srgrimes 4241556Srgrimes return (dest); 4251556Srgrimes} 4261556Srgrimes 42717987Speterint 428200956Sjillesnot_fcnumber(const char *s) 4291556Srgrimes{ 43020425Ssteve if (s == NULL) 43125224Ssteve return (0); 43220425Ssteve if (*s == '-') 43320425Ssteve s++; 4341556Srgrimes return (!is_number(s)); 4351556Srgrimes} 4361556Srgrimes 43717987Speterint 438200956Sjillesstr_to_event(const char *str, int last) 4391556Srgrimes{ 44084261Sobrien HistEvent he; 441200956Sjilles const char *s = str; 4421556Srgrimes int relative = 0; 44384261Sobrien int i, retval; 4441556Srgrimes 44584261Sobrien retval = history(hist, &he, H_FIRST); 4461556Srgrimes switch (*s) { 4471556Srgrimes case '-': 4481556Srgrimes relative = 1; 4491556Srgrimes /*FALLTHROUGH*/ 4501556Srgrimes case '+': 4511556Srgrimes s++; 4521556Srgrimes } 4531556Srgrimes if (is_number(s)) { 4541556Srgrimes i = atoi(s); 4551556Srgrimes if (relative) { 45684261Sobrien while (retval != -1 && i--) { 45784261Sobrien retval = history(hist, &he, H_NEXT); 4581556Srgrimes } 45984261Sobrien if (retval == -1) 46084261Sobrien retval = history(hist, &he, H_LAST); 4611556Srgrimes } else { 46284261Sobrien retval = history(hist, &he, H_NEXT_EVENT, i); 46384261Sobrien if (retval == -1) { 4641556Srgrimes /* 4651556Srgrimes * the notion of first and last is 4661556Srgrimes * backwards to that of the history package 4671556Srgrimes */ 46884261Sobrien retval = history(hist, &he, last ? H_FIRST : H_LAST); 4691556Srgrimes } 4701556Srgrimes } 47184261Sobrien if (retval == -1) 4721556Srgrimes error("history number %s not found (internal error)", 4731556Srgrimes str); 4741556Srgrimes } else { 4751556Srgrimes /* 4768855Srgrimes * pattern 4771556Srgrimes */ 47884261Sobrien retval = history(hist, &he, H_PREV_STR, str); 47984261Sobrien if (retval == -1) 4801556Srgrimes error("history pattern not found: %s", str); 4811556Srgrimes } 48284261Sobrien return (he.num); 4831556Srgrimes} 484100565Stjr 485100565Stjrint 486100565Stjrbindcmd(int argc, char **argv) 487100565Stjr{ 488100565Stjr 489100565Stjr if (el == NULL) 490100565Stjr error("line editing is disabled"); 491148974Sstefanf return (el_parse(el, argc, (const char **)argv)); 492100565Stjr} 493100565Stjr 49425224Ssteve#else 49525224Ssteve#include "error.h" 49625224Ssteve 49725224Ssteveint 49890111Simphistcmd(int argc, char **argv) 49925224Ssteve{ 50025224Ssteve 50125224Ssteve error("not compiled with history support"); 50225224Ssteve /*NOTREACHED*/ 50325224Ssteve return (0); 50425224Ssteve} 505100565Stjr 506100565Stjrint 507100565Stjrbindcmd(int argc, char **argv) 508100565Stjr{ 509100565Stjr 510100565Stjr error("not compiled with line editing support"); 511100565Stjr return (0); 512100565Stjr} 51325224Ssteve#endif 514