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("$FreeBSD$"); 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" 62223060Sjilles#include "builtins.h" 631556Srgrimes 641556Srgrimes#define MAXHISTLOOPS 4 /* max recursions through fc */ 651556Srgrimes#define DEFEDITOR "ed" /* default editor *should* be $EDITOR */ 661556Srgrimes 671556SrgrimesHistory *hist; /* history cookie */ 681556SrgrimesEditLine *el; /* editline cookie */ 691556Srgrimesint displayhist; 7084261Sobrienstatic FILE *el_in, *el_out, *el_err; 711556Srgrimes 72213811Sobrienstatic char *fc_replace(const char *, char *, char *); 73231790Sjillesstatic int not_fcnumber(const char *); 74231790Sjillesstatic int str_to_event(const char *, int); 751556Srgrimes 761556Srgrimes/* 771556Srgrimes * Set history and editing status. Called whenever the status may 781556Srgrimes * have changed (figures out what to do). 791556Srgrimes */ 8017987Spetervoid 8190111Simphistedit(void) 8217987Speter{ 831556Srgrimes 841556Srgrimes#define editing (Eflag || Vflag) 851556Srgrimes 861556Srgrimes if (iflag) { 871556Srgrimes if (!hist) { 881556Srgrimes /* 891556Srgrimes * turn history on 901556Srgrimes */ 911556Srgrimes INTOFF; 921556Srgrimes hist = history_init(); 931556Srgrimes INTON; 941556Srgrimes 951556Srgrimes if (hist != NULL) 9620425Ssteve sethistsize(histsizeval()); 971556Srgrimes else 98199629Sjilles out2fmt_flush("sh: can't initialize history\n"); 991556Srgrimes } 1001556Srgrimes if (editing && !el && isatty(0)) { /* && isatty(2) ??? */ 1011556Srgrimes /* 1021556Srgrimes * turn editing on 1031556Srgrimes */ 104208755Sjilles char *term; 105208755Sjilles 1061556Srgrimes INTOFF; 1071556Srgrimes if (el_in == NULL) 1081556Srgrimes el_in = fdopen(0, "r"); 10984261Sobrien if (el_err == NULL) 11084261Sobrien el_err = fdopen(1, "w"); 1111556Srgrimes if (el_out == NULL) 1121556Srgrimes el_out = fdopen(2, "w"); 11384261Sobrien if (el_in == NULL || el_err == NULL || el_out == NULL) 1141556Srgrimes goto bad; 115208755Sjilles term = lookupvar("TERM"); 116208755Sjilles if (term) 117208755Sjilles setenv("TERM", term, 1); 118208755Sjilles else 119208755Sjilles unsetenv("TERM"); 12084261Sobrien el = el_init(arg0, el_in, el_out, el_err); 1211556Srgrimes if (el != NULL) { 1221556Srgrimes if (hist) 1231556Srgrimes el_set(el, EL_HIST, history, hist); 1241556Srgrimes el_set(el, EL_PROMPT, getprompt); 125209221Sjilles el_set(el, EL_ADDFN, "sh-complete", 126209221Sjilles "Filename completion", 127209221Sjilles _el_fn_sh_complete); 1281556Srgrimes } else { 1291556Srgrimesbad: 130199629Sjilles out2fmt_flush("sh: can't initialize editing\n"); 1311556Srgrimes } 1321556Srgrimes INTON; 1331556Srgrimes } else if (!editing && el) { 1341556Srgrimes INTOFF; 1351556Srgrimes el_end(el); 1361556Srgrimes el = NULL; 1371556Srgrimes INTON; 1381556Srgrimes } 1391556Srgrimes if (el) { 1401556Srgrimes if (Vflag) 1411556Srgrimes el_set(el, EL_EDITOR, "vi"); 1421556Srgrimes else if (Eflag) 1431556Srgrimes el_set(el, EL_EDITOR, "emacs"); 144209221Sjilles el_set(el, EL_BIND, "^I", "sh-complete", NULL); 145100568Stjr el_source(el, NULL); 1461556Srgrimes } 1471556Srgrimes } else { 1481556Srgrimes INTOFF; 1491556Srgrimes if (el) { /* no editing if not interactive */ 1501556Srgrimes el_end(el); 1511556Srgrimes el = NULL; 1521556Srgrimes } 1531556Srgrimes if (hist) { 1541556Srgrimes history_end(hist); 1551556Srgrimes hist = NULL; 1561556Srgrimes } 1571556Srgrimes INTON; 1581556Srgrimes } 1591556Srgrimes} 1601556Srgrimes 16117987Speter 16217987Spetervoid 16320425Sstevesethistsize(hs) 16420425Ssteve const char *hs; 16517987Speter{ 1661556Srgrimes int histsize; 16784261Sobrien HistEvent he; 1681556Srgrimes 1691556Srgrimes if (hist != NULL) { 17020425Ssteve if (hs == NULL || *hs == '\0' || 17120425Ssteve (histsize = atoi(hs)) < 0) 1721556Srgrimes histsize = 100; 173151471Sstefanf history(hist, &he, H_SETSIZE, histsize); 174210736Sjilles history(hist, &he, H_SETUNIQUE, 1); 1751556Srgrimes } 1761556Srgrimes} 1771556Srgrimes 178208755Sjillesvoid 179208755Sjillessetterm(const char *term) 180208755Sjilles{ 181208755Sjilles if (rootshell && el != NULL && term != NULL) 182208755Sjilles el_set(el, EL_TERMINAL, term); 183208755Sjilles} 184208755Sjilles 18517987Speterint 18690111Simphistcmd(int argc, char **argv) 1871556Srgrimes{ 1881556Srgrimes int ch; 189201053Sjilles const char *editor = NULL; 19084261Sobrien HistEvent he; 1911556Srgrimes int lflg = 0, nflg = 0, rflg = 0, sflg = 0; 19284261Sobrien int i, retval; 193201053Sjilles const char *firststr, *laststr; 1941556Srgrimes int first, last, direction; 195201053Sjilles char *pat = NULL, *repl = NULL; 1961556Srgrimes static int active = 0; 1971556Srgrimes struct jmploc jmploc; 198194765Sjilles struct jmploc *savehandler; 199194765Sjilles char editfilestr[PATH_MAX]; 200194765Sjilles char *volatile editfile; 201201053Sjilles FILE *efp = NULL; 20297730Stjr int oldhistnum; 2031556Srgrimes 2041556Srgrimes if (hist == NULL) 2051556Srgrimes error("history not active"); 2068855Srgrimes 2071556Srgrimes if (argc == 1) 2081556Srgrimes error("missing history argument"); 2091556Srgrimes 2101556Srgrimes optreset = 1; optind = 1; /* initialize getopt */ 211100663Stjr opterr = 0; 2121556Srgrimes while (not_fcnumber(argv[optind]) && 21324348Simp (ch = getopt(argc, argv, ":e:lnrs")) != -1) 2141556Srgrimes switch ((char)ch) { 2151556Srgrimes case 'e': 21697731Stjr editor = optarg; 2171556Srgrimes break; 2181556Srgrimes case 'l': 2191556Srgrimes lflg = 1; 2201556Srgrimes break; 2211556Srgrimes case 'n': 2221556Srgrimes nflg = 1; 2231556Srgrimes break; 2241556Srgrimes case 'r': 2251556Srgrimes rflg = 1; 2261556Srgrimes break; 2271556Srgrimes case 's': 2281556Srgrimes sflg = 1; 2291556Srgrimes break; 2301556Srgrimes case ':': 2311556Srgrimes error("option -%c expects argument", optopt); 2321556Srgrimes case '?': 2331556Srgrimes default: 2341556Srgrimes error("unknown option: -%c", optopt); 2351556Srgrimes } 2361556Srgrimes argc -= optind, argv += optind; 2371556Srgrimes 238216806Sjilles savehandler = handler; 2391556Srgrimes /* 2401556Srgrimes * If executing... 2411556Srgrimes */ 2421556Srgrimes if (lflg == 0 || editor || sflg) { 2431556Srgrimes lflg = 0; /* ignore */ 244194765Sjilles editfile = NULL; 2451556Srgrimes /* 2461556Srgrimes * Catch interrupts to reset active counter and 2471556Srgrimes * cleanup temp files. 2481556Srgrimes */ 2491556Srgrimes if (setjmp(jmploc.loc)) { 2501556Srgrimes active = 0; 251194765Sjilles if (editfile) 2521556Srgrimes unlink(editfile); 2531556Srgrimes handler = savehandler; 2541556Srgrimes longjmp(handler->loc, 1); 2551556Srgrimes } 2561556Srgrimes handler = &jmploc; 2571556Srgrimes if (++active > MAXHISTLOOPS) { 2581556Srgrimes active = 0; 2591556Srgrimes displayhist = 0; 2601556Srgrimes error("called recursively too many times"); 2611556Srgrimes } 2621556Srgrimes /* 2631556Srgrimes * Set editor. 2641556Srgrimes */ 2651556Srgrimes if (sflg == 0) { 2661556Srgrimes if (editor == NULL && 2671556Srgrimes (editor = bltinlookup("FCEDIT", 1)) == NULL && 2681556Srgrimes (editor = bltinlookup("EDITOR", 1)) == NULL) 2691556Srgrimes editor = DEFEDITOR; 2701556Srgrimes if (editor[0] == '-' && editor[1] == '\0') { 2711556Srgrimes sflg = 1; /* no edit */ 2721556Srgrimes editor = NULL; 2731556Srgrimes } 2741556Srgrimes } 2751556Srgrimes } 2761556Srgrimes 2771556Srgrimes /* 2781556Srgrimes * If executing, parse [old=new] now 2791556Srgrimes */ 2808855Srgrimes if (lflg == 0 && argc > 0 && 2811556Srgrimes ((repl = strchr(argv[0], '=')) != NULL)) { 2821556Srgrimes pat = argv[0]; 2831556Srgrimes *repl++ = '\0'; 2841556Srgrimes argc--, argv++; 2851556Srgrimes } 2861556Srgrimes /* 2871556Srgrimes * determine [first] and [last] 2881556Srgrimes */ 2891556Srgrimes switch (argc) { 2901556Srgrimes case 0: 2911556Srgrimes firststr = lflg ? "-16" : "-1"; 2921556Srgrimes laststr = "-1"; 2931556Srgrimes break; 2941556Srgrimes case 1: 2951556Srgrimes firststr = argv[0]; 2961556Srgrimes laststr = lflg ? "-1" : argv[0]; 2971556Srgrimes break; 2981556Srgrimes case 2: 2991556Srgrimes firststr = argv[0]; 3001556Srgrimes laststr = argv[1]; 3011556Srgrimes break; 3021556Srgrimes default: 303214538Sjilles error("too many arguments"); 3041556Srgrimes } 3051556Srgrimes /* 3061556Srgrimes * Turn into event numbers. 3071556Srgrimes */ 3081556Srgrimes first = str_to_event(firststr, 0); 3091556Srgrimes last = str_to_event(laststr, 1); 3101556Srgrimes 3111556Srgrimes if (rflg) { 3121556Srgrimes i = last; 3131556Srgrimes last = first; 3141556Srgrimes first = i; 3151556Srgrimes } 3161556Srgrimes /* 3171556Srgrimes * XXX - this should not depend on the event numbers 3188855Srgrimes * always increasing. Add sequence numbers or offset 3191556Srgrimes * to the history element in next (diskbased) release. 3201556Srgrimes */ 3211556Srgrimes direction = first < last ? H_PREV : H_NEXT; 3221556Srgrimes 3231556Srgrimes /* 3241556Srgrimes * If editing, grab a temp file. 3251556Srgrimes */ 3261556Srgrimes if (editor) { 3271556Srgrimes int fd; 3281556Srgrimes INTOFF; /* easier */ 329194765Sjilles sprintf(editfilestr, "%s/_shXXXXXX", _PATH_TMP); 330194765Sjilles if ((fd = mkstemp(editfilestr)) < 0) 3311556Srgrimes error("can't create temporary file %s", editfile); 332194765Sjilles editfile = editfilestr; 3331556Srgrimes if ((efp = fdopen(fd, "w")) == NULL) { 3341556Srgrimes close(fd); 335214538Sjilles error("Out of space"); 3361556Srgrimes } 3371556Srgrimes } 3381556Srgrimes 3391556Srgrimes /* 3401556Srgrimes * Loop through selected history events. If listing or executing, 3411556Srgrimes * do it now. Otherwise, put into temp file and call the editor 3421556Srgrimes * after. 3431556Srgrimes * 3441556Srgrimes * The history interface needs rethinking, as the following 3451556Srgrimes * convolutions will demonstrate. 3461556Srgrimes */ 34784261Sobrien history(hist, &he, H_FIRST); 34884261Sobrien retval = history(hist, &he, H_NEXT_EVENT, first); 34984261Sobrien for (;retval != -1; retval = history(hist, &he, direction)) { 3501556Srgrimes if (lflg) { 3511556Srgrimes if (!nflg) 35284261Sobrien out1fmt("%5d ", he.num); 35384261Sobrien out1str(he.str); 3541556Srgrimes } else { 3558855Srgrimes char *s = pat ? 35684261Sobrien fc_replace(he.str, pat, repl) : (char *)he.str; 3571556Srgrimes 3581556Srgrimes if (sflg) { 3591556Srgrimes if (displayhist) { 3601556Srgrimes out2str(s); 361199629Sjilles flushout(out2); 3621556Srgrimes } 363193169Sstefanf evalstring(s, 0); 3641556Srgrimes if (displayhist && hist) { 3651556Srgrimes /* 3668855Srgrimes * XXX what about recursive and 3671556Srgrimes * relative histnums. 3681556Srgrimes */ 36997730Stjr oldhistnum = he.num; 37084261Sobrien history(hist, &he, H_ENTER, s); 37197730Stjr /* 37297730Stjr * XXX H_ENTER moves the internal 37397730Stjr * cursor, set it back to the current 37497730Stjr * entry. 37597730Stjr */ 37697730Stjr retval = history(hist, &he, 37797730Stjr H_NEXT_EVENT, oldhistnum); 3781556Srgrimes } 3791556Srgrimes } else 3801556Srgrimes fputs(s, efp); 3811556Srgrimes } 3821556Srgrimes /* 383160964Syar * At end? (if we were to lose last, we'd sure be 3841556Srgrimes * messed up). 3851556Srgrimes */ 38684261Sobrien if (he.num == last) 3871556Srgrimes break; 3881556Srgrimes } 3891556Srgrimes if (editor) { 3901556Srgrimes char *editcmd; 3911556Srgrimes 3921556Srgrimes fclose(efp); 3931556Srgrimes editcmd = stalloc(strlen(editor) + strlen(editfile) + 2); 3941556Srgrimes sprintf(editcmd, "%s %s", editor, editfile); 395193169Sstefanf evalstring(editcmd, 0); /* XXX - should use no JC command */ 3961556Srgrimes INTON; 3971556Srgrimes readcmdfile(editfile); /* XXX - should read back - quick tst */ 3981556Srgrimes unlink(editfile); 3991556Srgrimes } 4008855Srgrimes 4011556Srgrimes if (lflg == 0 && active > 0) 4021556Srgrimes --active; 4031556Srgrimes if (displayhist) 4041556Srgrimes displayhist = 0; 405216806Sjilles handler = savehandler; 40617987Speter return 0; 4071556Srgrimes} 4081556Srgrimes 409213811Sobrienstatic char * 41090111Simpfc_replace(const char *s, char *p, char *r) 4111556Srgrimes{ 4121556Srgrimes char *dest; 4131556Srgrimes int plen = strlen(p); 4141556Srgrimes 4151556Srgrimes STARTSTACKSTR(dest); 4161556Srgrimes while (*s) { 4171556Srgrimes if (*s == *p && strncmp(s, p, plen) == 0) { 418215783Sjilles STPUTS(r, dest); 4191556Srgrimes s += plen; 4201556Srgrimes *p = '\0'; /* so no more matches */ 4211556Srgrimes } else 4221556Srgrimes STPUTC(*s++, dest); 4231556Srgrimes } 424213814Sobrien STPUTC('\0', dest); 4251556Srgrimes dest = grabstackstr(dest); 4261556Srgrimes 4271556Srgrimes return (dest); 4281556Srgrimes} 4291556Srgrimes 430231790Sjillesstatic int 431200956Sjillesnot_fcnumber(const char *s) 4321556Srgrimes{ 43320425Ssteve if (s == NULL) 43425224Ssteve return (0); 43520425Ssteve if (*s == '-') 43620425Ssteve s++; 4371556Srgrimes return (!is_number(s)); 4381556Srgrimes} 4391556Srgrimes 440231790Sjillesstatic int 441200956Sjillesstr_to_event(const char *str, int last) 4421556Srgrimes{ 44384261Sobrien HistEvent he; 444200956Sjilles const char *s = str; 4451556Srgrimes int relative = 0; 44684261Sobrien int i, retval; 4471556Srgrimes 44884261Sobrien retval = history(hist, &he, H_FIRST); 4491556Srgrimes switch (*s) { 4501556Srgrimes case '-': 4511556Srgrimes relative = 1; 4521556Srgrimes /*FALLTHROUGH*/ 4531556Srgrimes case '+': 4541556Srgrimes s++; 4551556Srgrimes } 4561556Srgrimes if (is_number(s)) { 4571556Srgrimes i = atoi(s); 4581556Srgrimes if (relative) { 45984261Sobrien while (retval != -1 && i--) { 46084261Sobrien retval = history(hist, &he, H_NEXT); 4611556Srgrimes } 46284261Sobrien if (retval == -1) 46384261Sobrien retval = history(hist, &he, H_LAST); 4641556Srgrimes } else { 46584261Sobrien retval = history(hist, &he, H_NEXT_EVENT, i); 46684261Sobrien if (retval == -1) { 4671556Srgrimes /* 4681556Srgrimes * the notion of first and last is 4691556Srgrimes * backwards to that of the history package 4701556Srgrimes */ 47184261Sobrien retval = history(hist, &he, last ? H_FIRST : H_LAST); 4721556Srgrimes } 4731556Srgrimes } 47484261Sobrien if (retval == -1) 4751556Srgrimes error("history number %s not found (internal error)", 4761556Srgrimes str); 4771556Srgrimes } else { 4781556Srgrimes /* 4798855Srgrimes * pattern 4801556Srgrimes */ 48184261Sobrien retval = history(hist, &he, H_PREV_STR, str); 48284261Sobrien if (retval == -1) 4831556Srgrimes error("history pattern not found: %s", str); 4841556Srgrimes } 48584261Sobrien return (he.num); 4861556Srgrimes} 487100565Stjr 488100565Stjrint 489100565Stjrbindcmd(int argc, char **argv) 490100565Stjr{ 491100565Stjr 492100565Stjr if (el == NULL) 493100565Stjr error("line editing is disabled"); 494148974Sstefanf return (el_parse(el, argc, (const char **)argv)); 495100565Stjr} 496100565Stjr 49725224Ssteve#else 49825224Ssteve#include "error.h" 49925224Ssteve 50025224Ssteveint 50190111Simphistcmd(int argc, char **argv) 50225224Ssteve{ 50325224Ssteve 50425224Ssteve error("not compiled with history support"); 50525224Ssteve /*NOTREACHED*/ 50625224Ssteve return (0); 50725224Ssteve} 508100565Stjr 509100565Stjrint 510100565Stjrbindcmd(int argc, char **argv) 511100565Stjr{ 512100565Stjr 513100565Stjr error("not compiled with line editing support"); 514100565Stjr return (0); 515100565Stjr} 51625224Ssteve#endif 517