| 1 | /* $NetBSD: histedit.c,v 1.36 2005/05/09 11:35:19 christos Exp $ */
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| 2 |
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| 3 | /*-
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| 4 | * Copyright (c) 1993
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| 5 | * The Regents of the University of California. All rights reserved.
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| 6 | *
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| 7 | * This code is derived from software contributed to Berkeley by
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| 8 | * Kenneth Almquist.
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| 9 | *
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| 10 | * Redistribution and use in source and binary forms, with or without
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| 11 | * modification, are permitted provided that the following conditions
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| 12 | * are met:
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| 13 | * 1. Redistributions of source code must retain the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer.
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright
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| 16 | * notice, this list of conditions and the following disclaimer in the
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| 17 | * documentation and/or other materials provided with the distribution.
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| 18 | * 3. Neither the name of the University nor the names of its contributors
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| 19 | * may be used to endorse or promote products derived from this software
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| 20 | * without specific prior written permission.
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| 21 | *
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| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 32 | * SUCH DAMAGE.
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| 33 | */
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| 34 |
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| 35 | #ifdef HAVE_SYS_CDEFS_H
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| 36 | #include <sys/cdefs.h>
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| 37 | #endif
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| 38 | #ifndef lint
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| 39 | #if 0
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| 40 | static char sccsid[] = "@(#)histedit.c 8.2 (Berkeley) 5/4/95";
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| 41 | #else
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| 42 | __RCSID("$NetBSD: histedit.c,v 1.36 2005/05/09 11:35:19 christos Exp $");
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| 43 | #endif
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| 44 | #endif /* not lint */
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| 45 |
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| 46 | #include <sys/param.h>
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| 47 | #ifndef __sun__
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| 48 | #include <paths.h>
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| 49 | #endif
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| 50 | #include <stdio.h>
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| 51 | #include <stdlib.h>
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| 52 | #include <unistd.h>
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| 53 | /*
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| 54 | * Editline and history functions (and glue).
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| 55 | */
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| 56 | #include "shell.h"
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| 57 | #include "parser.h"
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| 58 | #include "var.h"
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| 59 | #include "options.h"
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| 60 | #include "main.h"
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| 61 | #include "output.h"
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| 62 | #include "mystring.h"
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| 63 | #include "myhistedit.h"
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| 64 | #include "error.h"
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| 65 | #ifndef SMALL
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| 66 | #include "eval.h"
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| 67 | #include "memalloc.h"
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| 68 |
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| 69 | #define MAXHISTLOOPS 4 /* max recursions through fc */
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| 70 | #define DEFEDITOR "ed" /* default editor *should* be $EDITOR */
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| 71 |
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| 72 | History *hist; /* history cookie */
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| 73 | EditLine *el; /* editline cookie */
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| 74 | int displayhist;
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| 75 | static FILE *el_in, *el_out;
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| 76 | unsigned char _el_fn_complete(EditLine *, int);
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| 77 |
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| 78 | STATIC const char *fc_replace(const char *, char *, char *);
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| 79 |
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| 80 | #ifdef DEBUG
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| 81 | extern FILE *tracefile;
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| 82 | #endif
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| 83 |
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| 84 | /*
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| 85 | * Set history and editing status. Called whenever the status may
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| 86 | * have changed (figures out what to do).
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| 87 | */
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| 88 | void
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| 89 | histedit(void)
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| 90 | {
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| 91 | FILE *el_err;
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| 92 |
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| 93 | #define editing (Eflag || Vflag)
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| 94 |
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| 95 | if (iflag) {
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| 96 | if (!hist) {
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| 97 | /*
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| 98 | * turn history on
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| 99 | */
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| 100 | INTOFF;
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| 101 | hist = history_init();
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| 102 | INTON;
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| 103 |
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| 104 | if (hist != NULL)
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| 105 | sethistsize(histsizeval());
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| 106 | else
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| 107 | out2str("sh: can't initialize history\n");
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| 108 | }
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| 109 | if (editing && !el && isatty(0)) { /* && isatty(2) ??? */
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| 110 | /*
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| 111 | * turn editing on
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| 112 | */
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| 113 | char *term, *shname;
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| 114 |
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| 115 | INTOFF;
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| 116 | if (el_in == NULL)
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| 117 | el_in = fdopen(0, "r");
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| 118 | if (el_out == NULL)
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| 119 | el_out = fdopen(2, "w");
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| 120 | if (el_in == NULL || el_out == NULL)
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| 121 | goto bad;
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| 122 | el_err = el_out;
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| 123 | #if DEBUG
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| 124 | if (tracefile)
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| 125 | el_err = tracefile;
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| 126 | #endif
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| 127 | term = lookupvar("TERM");
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| 128 | if (term)
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| 129 | setenv("TERM", term, 1);
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| 130 | else
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| 131 | unsetenv("TERM");
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| 132 | shname = arg0;
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| 133 | if (shname[0] == '-')
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| 134 | shname++;
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| 135 | el = el_init(shname, el_in, el_out, el_err);
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| 136 | if (el != NULL) {
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| 137 | if (hist)
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| 138 | el_set(el, EL_HIST, history, hist);
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| 139 | el_set(el, EL_PROMPT, getprompt);
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| 140 | el_set(el, EL_SIGNAL, 1);
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| 141 | el_set(el, EL_ADDFN, "rl-complete",
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| 142 | "ReadLine compatible completion function",
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| 143 | _el_fn_complete);
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| 144 | } else {
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| 145 | bad:
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| 146 | out2str("sh: can't initialize editing\n");
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| 147 | }
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| 148 | INTON;
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| 149 | } else if (!editing && el) {
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| 150 | INTOFF;
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| 151 | el_end(el);
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| 152 | el = NULL;
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| 153 | INTON;
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| 154 | }
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| 155 | if (el) {
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| 156 | if (Vflag)
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| 157 | el_set(el, EL_EDITOR, "vi");
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| 158 | else if (Eflag)
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| 159 | el_set(el, EL_EDITOR, "emacs");
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| 160 | el_set(el, EL_BIND, "^I",
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| 161 | tabcomplete ? "rl-complete" : "ed-insert", NULL);
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| 162 | el_source(el, NULL);
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| 163 | }
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| 164 | } else {
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| 165 | INTOFF;
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| 166 | if (el) { /* no editing if not interactive */
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| 167 | el_end(el);
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| 168 | el = NULL;
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| 169 | }
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| 170 | if (hist) {
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| 171 | history_end(hist);
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| 172 | hist = NULL;
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| 173 | }
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| 174 | INTON;
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| 175 | }
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| 176 | }
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| 177 |
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| 178 |
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| 179 | void
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| 180 | sethistsize(const char *hs)
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| 181 | {
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| 182 | int histsize;
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| 183 | HistEvent he;
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| 184 |
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| 185 | if (hist != NULL) {
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| 186 | if (hs == NULL || *hs == '\0' ||
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| 187 | (histsize = atoi(hs)) < 0)
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| 188 | histsize = 100;
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| 189 | history(hist, &he, H_SETSIZE, histsize);
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| 190 | }
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| 191 | }
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| 192 |
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| 193 | void
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| 194 | setterm(const char *term)
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| 195 | {
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| 196 | if (el != NULL && term != NULL)
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| 197 | if (el_set(el, EL_TERMINAL, term) != 0) {
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| 198 | outfmt(out2, "sh: Can't set terminal type %s\n", term);
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| 199 | outfmt(out2, "sh: Using dumb terminal settings.\n");
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| 200 | }
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| 201 | }
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| 202 |
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| 203 | int
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| 204 | inputrc(argc, argv)
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| 205 | int argc;
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| 206 | char **argv;
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| 207 | {
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| 208 | if (argc != 2) {
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| 209 | out2str("usage: inputrc file\n");
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| 210 | return 1;
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| 211 | }
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| 212 | if (el != NULL) {
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| 213 | if (el_source(el, argv[1])) {
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| 214 | out2str("inputrc: failed\n");
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| 215 | return 1;
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| 216 | } else
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| 217 | return 0;
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| 218 | } else {
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| 219 | out2str("sh: inputrc ignored, not editing\n");
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| 220 | return 1;
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| 221 | }
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| 222 | }
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| 223 |
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| 224 | /*
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| 225 | * This command is provided since POSIX decided to standardize
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| 226 | * the Korn shell fc command. Oh well...
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| 227 | */
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| 228 | int
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| 229 | histcmd(int argc, char **argv)
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| 230 | {
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| 231 | int ch;
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| 232 | const char *editor = NULL;
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| 233 | HistEvent he;
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| 234 | int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
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| 235 | int i, retval;
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| 236 | const char *firststr, *laststr;
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| 237 | int first, last, direction;
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| 238 | char *pat = NULL, *repl; /* ksh "fc old=new" crap */
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| 239 | static int active = 0;
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| 240 | struct jmploc jmploc;
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| 241 | struct jmploc *volatile savehandler;
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| 242 | char editfile[MAXPATHLEN + 1];
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| 243 | FILE *efp;
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| 244 | #ifdef __GNUC__
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| 245 | /* Avoid longjmp clobbering */
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| 246 | (void) &editor;
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| 247 | (void) &lflg;
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| 248 | (void) &nflg;
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| 249 | (void) &rflg;
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| 250 | (void) &sflg;
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| 251 | (void) &firststr;
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| 252 | (void) &laststr;
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| 253 | (void) &pat;
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| 254 | (void) &repl;
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| 255 | (void) &efp;
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| 256 | (void) &argc;
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| 257 | (void) &argv;
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| 258 | #endif
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| 259 |
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| 260 | if (hist == NULL)
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| 261 | error("history not active");
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| 262 |
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| 263 | if (argc == 1)
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| 264 | error("missing history argument");
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| 265 |
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| 266 | optreset = 1; optind = 1; /* initialize getopt */
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| 267 | while (not_fcnumber(argv[optind]) &&
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| 268 | (ch = getopt(argc, argv, ":e:lnrs")) != -1)
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| 269 | switch ((char)ch) {
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| 270 | case 'e':
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| 271 | editor = optionarg;
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| 272 | break;
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| 273 | case 'l':
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| 274 | lflg = 1;
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| 275 | break;
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| 276 | case 'n':
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| 277 | nflg = 1;
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| 278 | break;
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| 279 | case 'r':
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| 280 | rflg = 1;
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| 281 | break;
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| 282 | case 's':
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| 283 | sflg = 1;
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| 284 | break;
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| 285 | case ':':
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| 286 | error("option -%c expects argument", optopt);
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| 287 | /* NOTREACHED */
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| 288 | case '?':
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| 289 | default:
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| 290 | error("unknown option: -%c", optopt);
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| 291 | /* NOTREACHED */
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| 292 | }
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| 293 | argc -= optind, argv += optind;
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| 294 |
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| 295 | /*
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| 296 | * If executing...
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| 297 | */
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| 298 | if (lflg == 0 || editor || sflg) {
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| 299 | lflg = 0; /* ignore */
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| 300 | editfile[0] = '\0';
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| 301 | /*
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| 302 | * Catch interrupts to reset active counter and
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| 303 | * cleanup temp files.
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| 304 | */
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| 305 | if (setjmp(jmploc.loc)) {
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| 306 | active = 0;
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| 307 | if (*editfile)
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| 308 | unlink(editfile);
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| 309 | handler = savehandler;
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| 310 | longjmp(handler->loc, 1);
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| 311 | }
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| 312 | savehandler = handler;
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| 313 | handler = &jmploc;
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| 314 | if (++active > MAXHISTLOOPS) {
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| 315 | active = 0;
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| 316 | displayhist = 0;
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| 317 | error("called recursively too many times");
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| 318 | }
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| 319 | /*
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| 320 | * Set editor.
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| 321 | */
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| 322 | if (sflg == 0) {
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| 323 | if (editor == NULL &&
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| 324 | (editor = bltinlookup("FCEDIT", 1)) == NULL &&
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| 325 | (editor = bltinlookup("EDITOR", 1)) == NULL)
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| 326 | editor = DEFEDITOR;
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| 327 | if (editor[0] == '-' && editor[1] == '\0') {
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| 328 | sflg = 1; /* no edit */
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| 329 | editor = NULL;
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| 330 | }
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| 331 | }
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| 332 | }
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| 333 |
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| 334 | /*
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| 335 | * If executing, parse [old=new] now
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| 336 | */
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| 337 | if (lflg == 0 && argc > 0 &&
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| 338 | ((repl = strchr(argv[0], '=')) != NULL)) {
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| 339 | pat = argv[0];
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| 340 | *repl++ = '\0';
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| 341 | argc--, argv++;
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| 342 | }
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| 343 | /*
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| 344 | * determine [first] and [last]
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| 345 | */
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| 346 | switch (argc) {
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| 347 | case 0:
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| 348 | firststr = lflg ? "-16" : "-1";
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| 349 | laststr = "-1";
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| 350 | break;
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| 351 | case 1:
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| 352 | firststr = argv[0];
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| 353 | laststr = lflg ? "-1" : argv[0];
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| 354 | break;
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| 355 | case 2:
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| 356 | firststr = argv[0];
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| 357 | laststr = argv[1];
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| 358 | break;
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| 359 | default:
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| 360 | error("too many args");
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| 361 | /* NOTREACHED */
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| 362 | }
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| 363 | /*
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| 364 | * Turn into event numbers.
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| 365 | */
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| 366 | first = str_to_event(firststr, 0);
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| 367 | last = str_to_event(laststr, 1);
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| 368 |
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| 369 | if (rflg) {
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| 370 | i = last;
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| 371 | last = first;
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| 372 | first = i;
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| 373 | }
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| 374 | /*
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| 375 | * XXX - this should not depend on the event numbers
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| 376 | * always increasing. Add sequence numbers or offset
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| 377 | * to the history element in next (diskbased) release.
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| 378 | */
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| 379 | direction = first < last ? H_PREV : H_NEXT;
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| 380 |
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| 381 | /*
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| 382 | * If editing, grab a temp file.
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| 383 | */
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| 384 | if (editor) {
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| 385 | int fd;
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| 386 | INTOFF; /* easier */
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| 387 | snprintf(editfile, sizeof(editfile), "%s_shXXXXXX", _PATH_TMP);
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| 388 | if ((fd = mkstemp(editfile)) < 0)
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| 389 | error("can't create temporary file %s", editfile);
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| 390 | if ((efp = fdopen(fd, "w")) == NULL) {
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| 391 | close(fd);
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| 392 | error("can't allocate stdio buffer for temp");
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| 393 | }
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| 394 | }
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| 395 |
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| 396 | /*
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| 397 | * Loop through selected history events. If listing or executing,
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| 398 | * do it now. Otherwise, put into temp file and call the editor
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| 399 | * after.
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| 400 | *
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| 401 | * The history interface needs rethinking, as the following
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| 402 | * convolutions will demonstrate.
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| 403 | */
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| 404 | history(hist, &he, H_FIRST);
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| 405 | retval = history(hist, &he, H_NEXT_EVENT, first);
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| 406 | for (;retval != -1; retval = history(hist, &he, direction)) {
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| 407 | if (lflg) {
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| 408 | if (!nflg)
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| 409 | out1fmt("%5d ", he.num);
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| 410 | out1str(he.str);
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| 411 | } else {
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| 412 | const char *s = pat ?
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| 413 | fc_replace(he.str, pat, repl) : he.str;
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| 414 |
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| 415 | if (sflg) {
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| 416 | if (displayhist) {
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| 417 | out2str(s);
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| 418 | }
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| 419 |
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| 420 | evalstring(strcpy(stalloc(strlen(s) + 1), s), 0);
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| 421 | if (displayhist && hist) {
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| 422 | /*
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| 423 | * XXX what about recursive and
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| 424 | * relative histnums.
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| 425 | */
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| 426 | history(hist, &he, H_ENTER, s);
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| 427 | }
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| 428 | } else
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| 429 | fputs(s, efp);
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| 430 | }
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| 431 | /*
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| 432 | * At end? (if we were to lose last, we'd sure be
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| 433 | * messed up).
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| 434 | */
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| 435 | if (he.num == last)
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| 436 | break;
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| 437 | }
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| 438 | if (editor) {
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| 439 | char *editcmd;
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| 440 |
|
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| 441 | fclose(efp);
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| 442 | editcmd = stalloc(strlen(editor) + strlen(editfile) + 2);
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|---|
| 443 | sprintf(editcmd, "%s %s", editor, editfile);
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|---|
| 444 | evalstring(editcmd, 0); /* XXX - should use no JC command */
|
|---|
| 445 | INTON;
|
|---|
| 446 | readcmdfile(editfile); /* XXX - should read back - quick tst */
|
|---|
| 447 | unlink(editfile);
|
|---|
| 448 | }
|
|---|
| 449 |
|
|---|
| 450 | if (lflg == 0 && active > 0)
|
|---|
| 451 | --active;
|
|---|
| 452 | if (displayhist)
|
|---|
| 453 | displayhist = 0;
|
|---|
| 454 | return 0;
|
|---|
| 455 | }
|
|---|
| 456 |
|
|---|
| 457 | STATIC const char *
|
|---|
| 458 | fc_replace(const char *s, char *p, char *r)
|
|---|
| 459 | {
|
|---|
| 460 | char *dest;
|
|---|
| 461 | int plen = strlen(p);
|
|---|
| 462 |
|
|---|
| 463 | STARTSTACKSTR(dest);
|
|---|
| 464 | while (*s) {
|
|---|
| 465 | if (*s == *p && strncmp(s, p, plen) == 0) {
|
|---|
| 466 | while (*r)
|
|---|
| 467 | STPUTC(*r++, dest);
|
|---|
| 468 | s += plen;
|
|---|
| 469 | *p = '\0'; /* so no more matches */
|
|---|
| 470 | } else
|
|---|
| 471 | STPUTC(*s++, dest);
|
|---|
| 472 | }
|
|---|
| 473 | STACKSTRNUL(dest);
|
|---|
| 474 | dest = grabstackstr(dest);
|
|---|
| 475 |
|
|---|
| 476 | return (dest);
|
|---|
| 477 | }
|
|---|
| 478 |
|
|---|
| 479 | int
|
|---|
| 480 | not_fcnumber(char *s)
|
|---|
| 481 | {
|
|---|
| 482 | if (s == NULL)
|
|---|
| 483 | return 0;
|
|---|
| 484 | if (*s == '-')
|
|---|
| 485 | s++;
|
|---|
| 486 | return (!is_number(s));
|
|---|
| 487 | }
|
|---|
| 488 |
|
|---|
| 489 | int
|
|---|
| 490 | str_to_event(const char *str, int last)
|
|---|
| 491 | {
|
|---|
| 492 | HistEvent he;
|
|---|
| 493 | const char *s = str;
|
|---|
| 494 | int relative = 0;
|
|---|
| 495 | int i, retval;
|
|---|
| 496 |
|
|---|
| 497 | retval = history(hist, &he, H_FIRST);
|
|---|
| 498 | switch (*s) {
|
|---|
| 499 | case '-':
|
|---|
| 500 | relative = 1;
|
|---|
| 501 | /*FALLTHROUGH*/
|
|---|
| 502 | case '+':
|
|---|
| 503 | s++;
|
|---|
| 504 | }
|
|---|
| 505 | if (is_number(s)) {
|
|---|
| 506 | i = atoi(s);
|
|---|
| 507 | if (relative) {
|
|---|
| 508 | while (retval != -1 && i--) {
|
|---|
| 509 | retval = history(hist, &he, H_NEXT);
|
|---|
| 510 | }
|
|---|
| 511 | if (retval == -1)
|
|---|
| 512 | retval = history(hist, &he, H_LAST);
|
|---|
| 513 | } else {
|
|---|
| 514 | retval = history(hist, &he, H_NEXT_EVENT, i);
|
|---|
| 515 | if (retval == -1) {
|
|---|
| 516 | /*
|
|---|
| 517 | * the notion of first and last is
|
|---|
| 518 | * backwards to that of the history package
|
|---|
| 519 | */
|
|---|
| 520 | retval = history(hist, &he,
|
|---|
| 521 | last ? H_FIRST : H_LAST);
|
|---|
| 522 | }
|
|---|
| 523 | }
|
|---|
| 524 | if (retval == -1)
|
|---|
| 525 | error("history number %s not found (internal error)",
|
|---|
| 526 | str);
|
|---|
| 527 | } else {
|
|---|
| 528 | /*
|
|---|
| 529 | * pattern
|
|---|
| 530 | */
|
|---|
| 531 | retval = history(hist, &he, H_PREV_STR, str);
|
|---|
| 532 | if (retval == -1)
|
|---|
| 533 | error("history pattern not found: %s", str);
|
|---|
| 534 | }
|
|---|
| 535 | return (he.num);
|
|---|
| 536 | }
|
|---|
| 537 | #else
|
|---|
| 538 | int
|
|---|
| 539 | histcmd(int argc, char **argv)
|
|---|
| 540 | {
|
|---|
| 541 | error("not compiled with history support");
|
|---|
| 542 | /* NOTREACHED */
|
|---|
| 543 | }
|
|---|
| 544 | int
|
|---|
| 545 | inputrc(int argc, char **argv)
|
|---|
| 546 | {
|
|---|
| 547 | error("not compiled with history support");
|
|---|
| 548 | /* NOTREACHED */
|
|---|
| 549 | }
|
|---|
| 550 | #endif
|
|---|
