minix/commands/ash/histedit.c
Lionel Sambuc 252a83f614 Fix command line history in ash
Also did some cleanup in ash sources, to make minix modifications
more obvious, as well as some simplifications (by removing code which
is never compiled)

Removed EDITLINE support, use libedit, which does the termcap/terminfo
handling.

Change-Id: I19f7f425ed6a61298844631f9d7f3173cf7f30c0
2013-02-01 11:41:47 +01:00

533 lines
11 KiB
C

/*-
* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Kenneth Almquist.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
#if 0
static char sccsid[] = "@(#)histedit.c 8.2 (Berkeley) 5/4/95";
#endif
#endif /* not lint */
/*
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/bin/sh/histedit.c,v 1.26 2004/04/06 20:06:51 markm Exp $");
*/
#include <limits.h>
#ifndef NO_PATHS_H
#include <paths.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
/*
* Editline and history functions (and glue).
*/
#include "shell.h"
#include "parser.h"
#include "var.h"
#include "options.h"
#include "main.h"
#include "output.h"
#include "mystring.h"
#include "builtins.h"
#if !defined(NO_HISTORY)
#include "myhistedit.h"
#include "complete.h"
#include "error.h"
#include "eval.h"
#include "memalloc.h"
#define MAXHISTLOOPS 4 /* max recursions through fc */
#define DEFEDITOR "ed" /* default editor *should* be $EDITOR */
History *hist; /* history cookie */
EditLine *el; /* editline cookie */
int displayhist;
static FILE *el_in, *el_out, *el_err;
STATIC char *fc_replace(const char *, char *, char *);
STATIC int not_fcnumber(char *);
STATIC int str_to_event(char *, int);
/*
* Set history and editing status. Called whenever the status may
* have changed (figures out what to do).
*/
void
histedit(void)
{
#define editing (Eflag || Vflag)
if (iflag) {
if (!hist) {
/*
* turn history on
*/
INTOFF;
hist = history_init();
INTON;
if (hist != NULL)
sethistsize(histsizeval());
else
out2str("sh: can't initialize history\n");
}
if (editing && !el && isatty(0)) { /* && isatty(2) ??? */
/*
* turn editing on
*/
INTOFF;
if (el_in == NULL)
el_in = fdopen(0, "r");
if (el_err == NULL)
el_err = fdopen(1, "w");
if (el_out == NULL)
el_out = fdopen(2, "w");
if (el_in == NULL || el_err == NULL || el_out == NULL)
goto bad;
el = el_init(arg0, el_in, el_out, el_err);
if (el != NULL) {
if (hist)
el_set(el, EL_HIST, history, hist);
el_set(el, EL_PROMPT, getprompt);
} else {
bad:
out2str("sh: can't initialize editing\n");
}
INTON;
} else if (!editing && el) {
INTOFF;
el_end(el);
el = NULL;
INTON;
}
if (el) {
if (Vflag)
el_set(el, EL_EDITOR, "vi");
else if (Eflag)
el_set(el, EL_EDITOR, "emacs");
el_set(el, EL_ADDFN, "ed-do-complete",
"Complete Argument", complete);
el_set(el, EL_ADDFN, "ed-list-complete",
"List Argument Completions", complete_list);
el_set(el, EL_ADDFN, "ed-maybe-complete",
"Complete Argument Or List Completions",
complete_or_list);
el_set(el, EL_ADDFN, "ed-expand",
"Expand Completions", complete_expand);
el_set(el, EL_BIND, "^I", "ed-maybe-complete", NULL);
el_set(el, EL_BIND, "-a", "=", "ed-list-complete",
NULL);
el_set(el, EL_BIND, "-a", "\\\\", "ed-do-complete",
NULL);
el_set(el, EL_BIND, "-a", "*", "ed-expand",
NULL);
el_source(el, NULL);
}
} else {
INTOFF;
if (el) { /* no editing if not interactive */
el_end(el);
el = NULL;
}
if (hist) {
history_end(hist);
hist = NULL;
}
INTON;
}
}
void
sethistsize(hs)
const char *hs;
{
int histsize;
HistEvent he;
if (hist != NULL) {
if (hs == NULL || *hs == '\0' ||
(histsize = atoi(hs)) < 0)
histsize = 100;
history(hist, &he, H_SETSIZE, histsize);
}
}
int
histcmd(int argc, char **argv)
{
int ch;
char *editor = NULL;
HistEvent he;
int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
int i, retval;
char *firststr, *laststr;
int first, last, direction;
char *pat = NULL, *repl;
static int active = 0;
struct jmploc jmploc;
struct jmploc *volatile savehandler;
char editfile[PATH_MAX];
FILE *efp;
int oldhistnum;
#ifdef __GNUC__
/* Avoid longjmp clobbering */
(void) &editor;
(void) &lflg;
(void) &nflg;
(void) &rflg;
(void) &sflg;
(void) &firststr;
(void) &laststr;
(void) &pat;
(void) &repl;
(void) &efp;
(void) &argc;
(void) &argv;
#endif
if (hist == NULL)
error("history not active");
if (argc == 1)
error("missing history argument");
optreset = 1; optind = 1; /* initialize getopt */
opterr = 0;
while (not_fcnumber(argv[optind]) &&
(ch = getopt(argc, argv, ":e:lnrs")) != -1)
switch ((char)ch) {
case 'e':
editor = optarg;
break;
case 'l':
lflg = 1;
break;
case 'n':
nflg = 1;
break;
case 'r':
rflg = 1;
break;
case 's':
sflg = 1;
break;
case ':':
error("option -%c expects argument", optopt);
case '?':
default:
error("unknown option: -%c", optopt);
}
argc -= optind, argv += optind;
/*
* If executing...
*/
if (lflg == 0 || editor || sflg) {
lflg = 0; /* ignore */
editfile[0] = '\0';
/*
* Catch interrupts to reset active counter and
* cleanup temp files.
*/
if (setjmp(jmploc.loc)) {
active = 0;
if (*editfile)
unlink(editfile);
handler = savehandler;
longjmp(handler->loc, 1);
}
savehandler = handler;
handler = &jmploc;
if (++active > MAXHISTLOOPS) {
active = 0;
displayhist = 0;
error("called recursively too many times");
}
/*
* Set editor.
*/
if (sflg == 0) {
if (editor == NULL &&
(editor = bltinlookup("FCEDIT", 1)) == NULL &&
(editor = bltinlookup("EDITOR", 1)) == NULL)
editor = DEFEDITOR;
if (editor[0] == '-' && editor[1] == '\0') {
sflg = 1; /* no edit */
editor = NULL;
}
}
}
/*
* If executing, parse [old=new] now
*/
if (lflg == 0 && argc > 0 &&
((repl = strchr(argv[0], '=')) != NULL)) {
pat = argv[0];
*repl++ = '\0';
argc--, argv++;
}
/*
* determine [first] and [last]
*/
switch (argc) {
case 0:
firststr = lflg ? "-16" : "-1";
laststr = "-1";
break;
case 1:
firststr = argv[0];
laststr = lflg ? "-1" : argv[0];
break;
case 2:
firststr = argv[0];
laststr = argv[1];
break;
default:
error("too many args");
}
/*
* Turn into event numbers.
*/
first = str_to_event(firststr, 0);
last = str_to_event(laststr, 1);
if (rflg) {
i = last;
last = first;
first = i;
}
/*
* XXX - this should not depend on the event numbers
* always increasing. Add sequence numbers or offset
* to the history element in next (diskbased) release.
*/
direction = first < last ? H_PREV : H_NEXT;
/*
* If editing, grab a temp file.
*/
if (editor) {
int fd;
INTOFF; /* easier */
sprintf(editfile, "%s/_shXXXXXX", _PATH_TMP);
if ((fd = mkstemp(editfile)) < 0)
error("can't create temporary file %s", editfile);
if ((efp = fdopen(fd, "w")) == NULL) {
close(fd);
error("can't allocate stdio buffer for temp");
}
}
/*
* Loop through selected history events. If listing or executing,
* do it now. Otherwise, put into temp file and call the editor
* after.
*
* The history interface needs rethinking, as the following
* convolutions will demonstrate.
*/
history(hist, &he, H_FIRST);
retval = history(hist, &he, H_NEXT_EVENT, first);
for (;retval != -1; retval = history(hist, &he, direction)) {
if (lflg) {
if (!nflg)
out1fmt("%5d ", he.num);
out1str(he.str);
} else {
char *s = pat ?
fc_replace(he.str, pat, repl) : (char *)he.str;
if (sflg) {
if (displayhist) {
out2str(s);
}
evalstring(s);
if (displayhist && hist) {
/*
* XXX what about recursive and
* relative histnums.
*/
oldhistnum = he.num;
history(hist, &he, H_ENTER, s);
/*
* XXX H_ENTER moves the internal
* cursor, set it back to the current
* entry.
*/
retval = history(hist, &he,
H_NEXT_EVENT, oldhistnum);
}
} else
fputs(s, efp);
}
/*
* At end? (if we were to loose last, we'd sure be
* messed up).
*/
if (he.num == last)
break;
}
if (editor) {
char *editcmd;
fclose(efp);
editcmd = stalloc(strlen(editor) + strlen(editfile) + 2);
sprintf(editcmd, "%s %s", editor, editfile);
evalstring(editcmd); /* XXX - should use no JC command */
INTON;
readcmdfile(editfile); /* XXX - should read back - quick tst */
unlink(editfile);
}
if (lflg == 0 && active > 0)
--active;
if (displayhist)
displayhist = 0;
return 0;
}
STATIC char *
fc_replace(const char *s, char *p, char *r)
{
char *dest;
int plen = strlen(p);
STARTSTACKSTR(dest);
while (*s) {
if (*s == *p && strncmp(s, p, plen) == 0) {
while (*r)
STPUTC(*r++, dest);
s += plen;
*p = '\0'; /* so no more matches */
} else
STPUTC(*s++, dest);
}
STACKSTRNUL(dest);
dest = grabstackstr(dest);
return (dest);
}
STATIC int
not_fcnumber(char *s)
{
if (s == NULL)
return (0);
if (*s == '-')
s++;
return (!is_number(s));
}
STATIC int
str_to_event(char *str, int last)
{
HistEvent he;
char *s = str;
int relative = 0;
int i, retval;
retval = history(hist, &he, H_FIRST);
switch (*s) {
case '-':
relative = 1;
/*FALLTHROUGH*/
case '+':
s++;
}
if (is_number(s)) {
i = atoi(s);
if (relative) {
while (retval != -1 && i--) {
retval = history(hist, &he, H_NEXT);
}
if (retval == -1)
retval = history(hist, &he, H_LAST);
} else {
retval = history(hist, &he, H_NEXT_EVENT, i);
if (retval == -1) {
/*
* the notion of first and last is
* backwards to that of the history package
*/
retval = history(hist, &he, last ? H_FIRST : H_LAST);
}
}
if (retval == -1)
error("history number %s not found (internal error)",
str);
} else {
/*
* pattern
*/
retval = history(hist, &he, H_PREV_STR, str);
if (retval == -1)
error("history pattern not found: %s", str);
}
return (he.num);
}
int
bindcmd(int argc, char **argv)
{
if (el == NULL)
error("line editing is disabled");
return (el_parse(el, argc, argv));
}
#else
#include "error.h"
int
histcmd(int argc, char **argv)
{
error("not compiled with history support");
/*NOTREACHED*/
return (0);
}
int
bindcmd(int argc, char **argv)
{
error("not compiled with line editing support");
return (0);
}
#endif /* !NO_HISTORY */
/*
* $PchId: histedit.c,v 1.6 2006/04/10 14:52:58 philip Exp $
*/