0,0 → 1,513 |
/* $NetBSD: histedit.c,v 1.24 2000/11/06 04:21:14 mycroft Exp $ */ |
|
/*- |
* 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. |
* 3. All advertising materials mentioning features or use of this software |
* must display the following acknowledgement: |
* This product includes software developed by the University of |
* California, Berkeley and its contributors. |
* 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. |
*/ |
|
#include <sys/cdefs.h> |
#ifndef lint |
#if 0 |
static char sccsid[] = "@(#)histedit.c 8.2 (Berkeley) 5/4/95"; |
#else |
__RCSID("$NetBSD: histedit.c,v 1.24 2000/11/06 04:21:14 mycroft Exp $"); |
#endif |
#endif /* not lint */ |
|
#include <sys/param.h> |
#include <paths.h> |
#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 "error.h" |
#ifndef SMALL |
#include "myhistedit.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; |
|
STATIC const char *fc_replace (const char *, char *, char *); |
|
/* |
* Set history and editing status. Called whenever the status may |
* have changed (figures out what to do). |
*/ |
void |
histedit() |
{ |
|
#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_out == NULL) |
el_out = fdopen(2, "w"); |
if (el_in == NULL || el_out == NULL) |
goto bad; |
el = el_init(arg0, el_in, el_out, el_out); |
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_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); |
} |
} |
|
void |
setterm(term) |
const char *term; |
{ |
if (el != NULL && term != NULL) |
if (el_set(el, EL_TERMINAL, term) != 0) { |
outfmt(out2, "sh: Can't set terminal type %s\n", term); |
outfmt(out2, "sh: Using dumb terminal settings.\n"); |
} |
} |
|
/* |
* This command is provided since POSIX decided to standardize |
* the Korn shell fc command. Oh well... |
*/ |
int |
histcmd(argc, argv) |
int argc; |
char **argv; |
{ |
int ch; |
const char *editor = NULL; |
HistEvent he; |
int lflg = 0, nflg = 0, rflg = 0, sflg = 0; |
int i, retval; |
const char *firststr, *laststr; |
int first, last, direction; |
char *pat = NULL, *repl; /* ksh "fc old=new" crap */ |
static int active = 0; |
struct jmploc jmploc; |
struct jmploc *volatile savehandler; |
char editfile[MAXPATHLEN + 1]; |
FILE *efp; |
#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"); |
|
#ifdef __GLIBC__ |
optind = 1; |
#else |
optreset = 1; optind = 1; /* initialize getopt */ |
#endif |
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); |
/* NOTREACHED */ |
case '?': |
default: |
error("unknown option: -%c", optopt); |
/* NOTREACHED */ |
} |
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"); |
/* NOTREACHED */ |
} |
/* |
* 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 { |
const char *s = pat ? |
fc_replace(he.str, pat, repl) : he.str; |
char *sp; |
|
if (sflg) { |
if (displayhist) { |
out2str(s); |
} |
|
evalstring(strcpy(stalloc(strlen(s) + 1), s), 0); |
free(sp); |
if (displayhist && hist) { |
/* |
* XXX what about recursive and |
* relative histnums. |
*/ |
history(hist, &he, H_ENTER, s); |
} |
} else |
fputs(s, efp); |
} |
/* |
* At end? (if we were to lose 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, 0); /* 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 const char * |
fc_replace(s, p, r) |
const char *s; |
char *p, *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); |
} |
|
int |
not_fcnumber(s) |
char *s; |
{ |
if (s == NULL) |
return 0; |
if (*s == '-') |
s++; |
return (!is_number(s)); |
} |
|
int |
str_to_event(str, last) |
const char *str; |
int last; |
{ |
HistEvent he; |
const 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); |
} |
#else |
int |
histcmd(argc, argv) |
int argc; |
char **argv; |
{ |
error("not compiled with history support"); |
/* NOTREACHED */ |
} |
#endif |