1642 lines
30 KiB
C
1642 lines
30 KiB
C
/*-
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* Copyright (c) 1980, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: lex.c,v 1.2 1994/09/24 02:54:09 davidg Exp $
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*/
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#ifndef lint
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static char sccsid[] = "@(#)lex.c 8.1 (Berkeley) 5/31/93";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <termios.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#if __STDC__
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# include <stdarg.h>
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#else
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# include <varargs.h>
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#endif
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#include "csh.h"
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#include "extern.h"
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/*
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* These lexical routines read input and form lists of words.
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* There is some involved processing here, because of the complications
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* of input buffering, and especially because of history substitution.
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*/
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static Char *word __P((void));
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static int getC1 __P((int));
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static void getdol __P((void));
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static void getexcl __P((int));
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static struct Hist
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*findev __P((Char *, bool));
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static void setexclp __P((Char *));
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static int bgetc __P((void));
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static void bfree __P((void));
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static struct wordent
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*gethent __P((int));
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static int matchs __P((Char *, Char *));
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static int getsel __P((int *, int *, int));
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static struct wordent
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*getsub __P((struct wordent *));
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static Char *subword __P((Char *, int, bool *));
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static struct wordent
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*dosub __P((int, struct wordent *, bool));
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/*
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* Peekc is a peek character for getC, peekread for readc.
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* There is a subtlety here in many places... history routines
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* will read ahead and then insert stuff into the input stream.
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* If they push back a character then they must push it behind
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* the text substituted by the history substitution. On the other
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* hand in several places we need 2 peek characters. To make this
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* all work, the history routines read with getC, and make use both
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* of ungetC and unreadc. The key observation is that the state
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* of getC at the call of a history reference is such that calls
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* to getC from the history routines will always yield calls of
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* readc, unless this peeking is involved. That is to say that during
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* getexcl the variables lap, exclp, and exclnxt are all zero.
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*
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* Getdol invokes history substitution, hence the extra peek, peekd,
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* which it can ungetD to be before history substitutions.
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*/
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static Char peekc = 0, peekd = 0;
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static Char peekread = 0;
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/* (Tail of) current word from ! subst */
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static Char *exclp = NULL;
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/* The rest of the ! subst words */
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static struct wordent *exclnxt = NULL;
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/* Count of remaining words in ! subst */
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static int exclc = 0;
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/* "Globp" for alias resubstitution */
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Char *alvecp = NULL;
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int aret = F_SEEK;
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/*
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* Labuf implements a general buffer for lookahead during lexical operations.
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* Text which is to be placed in the input stream can be stuck here.
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* We stick parsed ahead $ constructs during initial input,
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* process id's from `$$', and modified variable values (from qualifiers
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* during expansion in sh.dol.c) here.
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*/
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static Char labuf[BUFSIZ];
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/*
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* Lex returns to its caller not only a wordlist (as a "var" parameter)
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* but also whether a history substitution occurred. This is used in
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* the main (process) routine to determine whether to echo, and also
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* when called by the alias routine to determine whether to keep the
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* argument list.
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*/
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static bool hadhist = 0;
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/*
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* Avoid alias expansion recursion via \!#
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*/
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int hleft;
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static Char getCtmp;
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#define getC(f) ((getCtmp = peekc) ? (peekc = 0, getCtmp) : getC1(f))
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#define ungetC(c) peekc = c
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#define ungetD(c) peekd = c
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int
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lex(hp)
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register struct wordent *hp;
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{
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register struct wordent *wdp;
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int c;
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btell(&lineloc);
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hp->next = hp->prev = hp;
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hp->word = STRNULL;
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hadhist = 0;
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do
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c = readc(0);
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while (c == ' ' || c == '\t');
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if (c == HISTSUB && intty)
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/* ^lef^rit from tty is short !:s^lef^rit */
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getexcl(c);
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else
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unreadc(c);
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wdp = hp;
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/*
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* The following loop is written so that the links needed by freelex will
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* be ready and rarin to go even if it is interrupted.
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*/
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do {
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register struct wordent *new;
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new = (struct wordent *) xmalloc((size_t) sizeof(*wdp));
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new->word = 0;
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new->prev = wdp;
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new->next = hp;
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wdp->next = new;
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wdp = new;
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wdp->word = word();
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} while (wdp->word[0] != '\n');
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hp->prev = wdp;
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return (hadhist);
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}
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void
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prlex(fp, sp0)
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FILE *fp;
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struct wordent *sp0;
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{
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register struct wordent *sp = sp0->next;
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for (;;) {
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(void) fprintf(fp, "%s", vis_str(sp->word));
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sp = sp->next;
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if (sp == sp0)
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break;
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if (sp->word[0] != '\n')
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(void) fputc(' ', fp);
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}
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}
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void
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copylex(hp, fp)
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register struct wordent *hp;
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register struct wordent *fp;
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{
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register struct wordent *wdp;
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wdp = hp;
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fp = fp->next;
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do {
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register struct wordent *new;
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new = (struct wordent *) xmalloc((size_t) sizeof(*wdp));
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new->prev = wdp;
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new->next = hp;
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wdp->next = new;
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wdp = new;
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wdp->word = Strsave(fp->word);
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fp = fp->next;
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} while (wdp->word[0] != '\n');
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hp->prev = wdp;
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}
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void
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freelex(vp)
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register struct wordent *vp;
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{
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register struct wordent *fp;
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while (vp->next != vp) {
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fp = vp->next;
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vp->next = fp->next;
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xfree((ptr_t) fp->word);
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xfree((ptr_t) fp);
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}
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vp->prev = vp;
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}
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static Char *
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word()
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{
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register Char c, c1;
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register Char *wp;
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Char wbuf[BUFSIZ];
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register bool dolflg;
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register int i;
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wp = wbuf;
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i = BUFSIZ - 4;
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loop:
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while ((c = getC(DOALL)) == ' ' || c == '\t')
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continue;
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if (cmap(c, _META | _ESC))
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switch (c) {
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case '&':
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case '|':
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case '<':
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case '>':
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*wp++ = c;
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c1 = getC(DOALL);
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if (c1 == c)
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*wp++ = c1;
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else
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ungetC(c1);
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goto ret;
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case '#':
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if (intty)
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break;
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c = 0;
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do {
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c1 = c;
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c = getC(0);
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} while (c != '\n');
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if (c1 == '\\')
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goto loop;
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/* fall into ... */
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case ';':
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case '(':
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case ')':
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case '\n':
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*wp++ = c;
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goto ret;
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case '\\':
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c = getC(0);
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if (c == '\n') {
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if (onelflg == 1)
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onelflg = 2;
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goto loop;
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}
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if (c != HIST)
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*wp++ = '\\', --i;
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c |= QUOTE;
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}
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c1 = 0;
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dolflg = DOALL;
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for (;;) {
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if (c1) {
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if (c == c1) {
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c1 = 0;
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dolflg = DOALL;
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}
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else if (c == '\\') {
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c = getC(0);
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if (c == HIST)
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c |= QUOTE;
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else {
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if (c == '\n')
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/*
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* if (c1 == '`') c = ' '; else
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*/
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c |= QUOTE;
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ungetC(c);
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c = '\\';
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}
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}
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else if (c == '\n') {
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seterror(ERR_UNMATCHED, c1);
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ungetC(c);
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break;
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}
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}
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else if (cmap(c, _META | _QF | _QB | _ESC)) {
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if (c == '\\') {
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c = getC(0);
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if (c == '\n') {
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if (onelflg == 1)
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onelflg = 2;
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break;
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}
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if (c != HIST)
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*wp++ = '\\', --i;
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c |= QUOTE;
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}
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else if (cmap(c, _QF | _QB)) { /* '"` */
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c1 = c;
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dolflg = c == '"' ? DOALL : DOEXCL;
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}
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else if (c != '#' || !intty) {
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ungetC(c);
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break;
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}
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}
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if (--i > 0) {
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*wp++ = c;
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c = getC(dolflg);
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}
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else {
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seterror(ERR_WTOOLONG);
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wp = &wbuf[1];
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break;
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}
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}
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ret:
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*wp = 0;
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return (Strsave(wbuf));
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}
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static int
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getC1(flag)
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register int flag;
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{
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register Char c;
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while (1) {
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if ((c = peekc) != '\0') {
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peekc = 0;
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return (c);
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}
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if (lap) {
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if ((c = *lap++) == 0)
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lap = 0;
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else {
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if (cmap(c, _META | _QF | _QB))
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c |= QUOTE;
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return (c);
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}
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}
|
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if ((c = peekd) != '\0') {
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peekd = 0;
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return (c);
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}
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if (exclp) {
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if ((c = *exclp++) != '\0')
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return (c);
|
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if (exclnxt && --exclc >= 0) {
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exclnxt = exclnxt->next;
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setexclp(exclnxt->word);
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return (' ');
|
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}
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exclp = 0;
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exclnxt = 0;
|
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}
|
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if (exclnxt) {
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exclnxt = exclnxt->next;
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if (--exclc < 0)
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exclnxt = 0;
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else
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setexclp(exclnxt->word);
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continue;
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}
|
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c = readc(0);
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if (c == '$' && (flag & DODOL)) {
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getdol();
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continue;
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}
|
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if (c == HIST && (flag & DOEXCL)) {
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getexcl(0);
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continue;
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}
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break;
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}
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return (c);
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}
|
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static void
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getdol()
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{
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register Char *np, *ep;
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Char name[4 * MAXVARLEN + 1];
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register int c;
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int sc;
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bool special = 0, toolong;
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|
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np = name, *np++ = '$';
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c = sc = getC(DOEXCL);
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if (any("\t \n", c)) {
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ungetD(c);
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|
ungetC('$' | QUOTE);
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return;
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}
|
|
if (c == '{')
|
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*np++ = c, c = getC(DOEXCL);
|
|
if (c == '#' || c == '?')
|
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special++, *np++ = c, c = getC(DOEXCL);
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*np++ = c;
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switch (c) {
|
|
|
|
case '<':
|
|
case '$':
|
|
case '!':
|
|
if (special)
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|
seterror(ERR_SPDOLLT);
|
|
*np = 0;
|
|
addla(name);
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return;
|
|
|
|
case '\n':
|
|
ungetD(c);
|
|
np--;
|
|
seterror(ERR_NEWLINE);
|
|
*np = 0;
|
|
addla(name);
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|
return;
|
|
|
|
case '*':
|
|
if (special)
|
|
seterror(ERR_SPSTAR);
|
|
*np = 0;
|
|
addla(name);
|
|
return;
|
|
|
|
default:
|
|
toolong = 0;
|
|
if (Isdigit(c)) {
|
|
#ifdef notdef
|
|
/* let $?0 pass for now */
|
|
if (special) {
|
|
seterror(ERR_DIGIT);
|
|
*np = 0;
|
|
addla(name);
|
|
return;
|
|
}
|
|
#endif
|
|
/* we know that np < &name[4] */
|
|
ep = &np[MAXVARLEN];
|
|
while ((c = getC(DOEXCL)) != '\0'){
|
|
if (!Isdigit(c))
|
|
break;
|
|
if (np < ep)
|
|
*np++ = c;
|
|
else
|
|
toolong = 1;
|
|
}
|
|
}
|
|
else if (letter(c)) {
|
|
/* we know that np < &name[4] */
|
|
ep = &np[MAXVARLEN];
|
|
toolong = 0;
|
|
while ((c = getC(DOEXCL)) != '\0') {
|
|
/* Bugfix for ${v123x} from Chris Torek, DAS DEC-90. */
|
|
if (!letter(c) && !Isdigit(c))
|
|
break;
|
|
if (np < ep)
|
|
*np++ = c;
|
|
else
|
|
toolong = 1;
|
|
}
|
|
}
|
|
else {
|
|
*np = 0;
|
|
seterror(ERR_VARILL);
|
|
addla(name);
|
|
return;
|
|
}
|
|
if (toolong) {
|
|
seterror(ERR_VARTOOLONG);
|
|
*np = 0;
|
|
addla(name);
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
if (c == '[') {
|
|
*np++ = c;
|
|
/*
|
|
* Name up to here is a max of MAXVARLEN + 8.
|
|
*/
|
|
ep = &np[2 * MAXVARLEN + 8];
|
|
do {
|
|
/*
|
|
* Michael Greim: Allow $ expansion to take place in selector
|
|
* expressions. (limits the number of characters returned)
|
|
*/
|
|
c = getC(DOEXCL | DODOL);
|
|
if (c == '\n') {
|
|
ungetD(c);
|
|
np--;
|
|
seterror(ERR_NLINDEX);
|
|
*np = 0;
|
|
addla(name);
|
|
return;
|
|
}
|
|
if (np < ep)
|
|
*np++ = c;
|
|
} while (c != ']');
|
|
*np = '\0';
|
|
if (np >= ep) {
|
|
seterror(ERR_SELOVFL);
|
|
addla(name);
|
|
return;
|
|
}
|
|
c = getC(DOEXCL);
|
|
}
|
|
/*
|
|
* Name up to here is a max of 2 * MAXVARLEN + 8.
|
|
*/
|
|
if (c == ':') {
|
|
/*
|
|
* if the :g modifier is followed by a newline, then error right away!
|
|
* -strike
|
|
*/
|
|
|
|
int gmodflag = 0, amodflag = 0;
|
|
|
|
do {
|
|
*np++ = c, c = getC(DOEXCL);
|
|
if (c == 'g' || c == 'a') {
|
|
if (c == 'g')
|
|
gmodflag++;
|
|
else
|
|
amodflag++;
|
|
*np++ = c; c = getC(DOEXCL);
|
|
}
|
|
if ((c == 'g' && !gmodflag) || (c == 'a' && !amodflag)) {
|
|
if (c == 'g')
|
|
gmodflag++;
|
|
else
|
|
amodflag++;
|
|
*np++ = c; c = getC(DOEXCL);
|
|
}
|
|
*np++ = c;
|
|
/* scan s// [eichin:19910926.0512EST] */
|
|
if (c == 's') {
|
|
int delimcnt = 2;
|
|
int delim = getC(0);
|
|
*np++ = delim;
|
|
|
|
if (!delim || letter(delim)
|
|
|| Isdigit(delim) || any(" \t\n", delim)) {
|
|
seterror(ERR_BADSUBST);
|
|
break;
|
|
}
|
|
while ((c = getC(0)) != (-1)) {
|
|
*np++ = c;
|
|
if(c == delim) delimcnt--;
|
|
if(!delimcnt) break;
|
|
}
|
|
if(delimcnt) {
|
|
seterror(ERR_BADSUBST);
|
|
break;
|
|
}
|
|
c = 's';
|
|
}
|
|
if (!any("htrqxes", c)) {
|
|
if ((amodflag || gmodflag) && c == '\n')
|
|
stderror(ERR_VARSYN); /* strike */
|
|
seterror(ERR_VARMOD, c);
|
|
*np = 0;
|
|
addla(name);
|
|
return;
|
|
}
|
|
}
|
|
while ((c = getC(DOEXCL)) == ':');
|
|
ungetD(c);
|
|
}
|
|
else
|
|
ungetD(c);
|
|
if (sc == '{') {
|
|
c = getC(DOEXCL);
|
|
if (c != '}') {
|
|
ungetD(c);
|
|
seterror(ERR_MISSING, '}');
|
|
*np = 0;
|
|
addla(name);
|
|
return;
|
|
}
|
|
*np++ = c;
|
|
}
|
|
*np = 0;
|
|
addla(name);
|
|
return;
|
|
}
|
|
|
|
void
|
|
addla(cp)
|
|
Char *cp;
|
|
{
|
|
Char buf[BUFSIZ];
|
|
|
|
if (Strlen(cp) + (lap ? Strlen(lap) : 0) >=
|
|
(sizeof(labuf) - 4) / sizeof(Char)) {
|
|
seterror(ERR_EXPOVFL);
|
|
return;
|
|
}
|
|
if (lap)
|
|
(void) Strcpy(buf, lap);
|
|
(void) Strcpy(labuf, cp);
|
|
if (lap)
|
|
(void) Strcat(labuf, buf);
|
|
lap = labuf;
|
|
}
|
|
|
|
static Char lhsb[32];
|
|
static Char slhs[32];
|
|
static Char rhsb[64];
|
|
static int quesarg;
|
|
|
|
static void
|
|
getexcl(sc)
|
|
int sc;
|
|
{
|
|
register struct wordent *hp, *ip;
|
|
int left, right, dol;
|
|
register int c;
|
|
|
|
if (sc == 0) {
|
|
sc = getC(0);
|
|
if (sc != '{') {
|
|
ungetC(sc);
|
|
sc = 0;
|
|
}
|
|
}
|
|
quesarg = -1;
|
|
lastev = eventno;
|
|
hp = gethent(sc);
|
|
if (hp == 0)
|
|
return;
|
|
hadhist = 1;
|
|
dol = 0;
|
|
if (hp == alhistp)
|
|
for (ip = hp->next->next; ip != alhistt; ip = ip->next)
|
|
dol++;
|
|
else
|
|
for (ip = hp->next->next; ip != hp->prev; ip = ip->next)
|
|
dol++;
|
|
left = 0, right = dol;
|
|
if (sc == HISTSUB) {
|
|
ungetC('s'), unreadc(HISTSUB), c = ':';
|
|
goto subst;
|
|
}
|
|
c = getC(0);
|
|
if (!any(":^$*-%", c))
|
|
goto subst;
|
|
left = right = -1;
|
|
if (c == ':') {
|
|
c = getC(0);
|
|
unreadc(c);
|
|
if (letter(c) || c == '&') {
|
|
c = ':';
|
|
left = 0, right = dol;
|
|
goto subst;
|
|
}
|
|
}
|
|
else
|
|
ungetC(c);
|
|
if (!getsel(&left, &right, dol))
|
|
return;
|
|
c = getC(0);
|
|
if (c == '*')
|
|
ungetC(c), c = '-';
|
|
if (c == '-') {
|
|
if (!getsel(&left, &right, dol))
|
|
return;
|
|
c = getC(0);
|
|
}
|
|
subst:
|
|
exclc = right - left + 1;
|
|
while (--left >= 0)
|
|
hp = hp->next;
|
|
if (sc == HISTSUB || c == ':') {
|
|
do {
|
|
hp = getsub(hp);
|
|
c = getC(0);
|
|
} while (c == ':');
|
|
}
|
|
unreadc(c);
|
|
if (sc == '{') {
|
|
c = getC(0);
|
|
if (c != '}')
|
|
seterror(ERR_BADBANG);
|
|
}
|
|
exclnxt = hp;
|
|
}
|
|
|
|
static struct wordent *
|
|
getsub(en)
|
|
struct wordent *en;
|
|
{
|
|
register Char *cp;
|
|
int delim;
|
|
register int c;
|
|
int sc;
|
|
bool global;
|
|
Char orhsb[sizeof(rhsb) / sizeof(Char)];
|
|
|
|
do {
|
|
exclnxt = 0;
|
|
global = 0;
|
|
sc = c = getC(0);
|
|
if (c == 'g' || c == 'a') {
|
|
global |= (c == 'g') ? 1 : 2;
|
|
sc = c = getC(0);
|
|
}
|
|
if (((c =='g') && !(global & 1)) || ((c == 'a') && !(global & 2))) {
|
|
global |= (c == 'g') ? 1 : 2;
|
|
sc = c = getC(0);
|
|
}
|
|
|
|
switch (c) {
|
|
case 'p':
|
|
justpr++;
|
|
return (en);
|
|
|
|
case 'x':
|
|
case 'q':
|
|
global |= 1;
|
|
|
|
/* fall into ... */
|
|
|
|
case 'h':
|
|
case 'r':
|
|
case 't':
|
|
case 'e':
|
|
break;
|
|
|
|
case '&':
|
|
if (slhs[0] == 0) {
|
|
seterror(ERR_NOSUBST);
|
|
return (en);
|
|
}
|
|
(void) Strcpy(lhsb, slhs);
|
|
break;
|
|
|
|
#ifdef notdef
|
|
case '~':
|
|
if (lhsb[0] == 0)
|
|
goto badlhs;
|
|
break;
|
|
#endif
|
|
|
|
case 's':
|
|
delim = getC(0);
|
|
if (letter(delim) || Isdigit(delim) || any(" \t\n", delim)) {
|
|
unreadc(delim);
|
|
lhsb[0] = 0;
|
|
seterror(ERR_BADSUBST);
|
|
return (en);
|
|
}
|
|
cp = lhsb;
|
|
for (;;) {
|
|
c = getC(0);
|
|
if (c == '\n') {
|
|
unreadc(c);
|
|
break;
|
|
}
|
|
if (c == delim)
|
|
break;
|
|
if (cp > &lhsb[sizeof(lhsb) / sizeof(Char) - 2]) {
|
|
lhsb[0] = 0;
|
|
seterror(ERR_BADSUBST);
|
|
return (en);
|
|
}
|
|
if (c == '\\') {
|
|
c = getC(0);
|
|
if (c != delim && c != '\\')
|
|
*cp++ = '\\';
|
|
}
|
|
*cp++ = c;
|
|
}
|
|
if (cp != lhsb)
|
|
*cp++ = 0;
|
|
else if (lhsb[0] == 0) {
|
|
seterror(ERR_LHS);
|
|
return (en);
|
|
}
|
|
cp = rhsb;
|
|
(void) Strcpy(orhsb, cp);
|
|
for (;;) {
|
|
c = getC(0);
|
|
if (c == '\n') {
|
|
unreadc(c);
|
|
break;
|
|
}
|
|
if (c == delim)
|
|
break;
|
|
#ifdef notdef
|
|
if (c == '~') {
|
|
if (&cp[Strlen(orhsb)] > &rhsb[sizeof(rhsb) /
|
|
sizeof(Char) - 2])
|
|
goto toorhs;
|
|
(void) Strcpy(cp, orhsb);
|
|
cp = Strend(cp);
|
|
continue;
|
|
}
|
|
#endif
|
|
if (cp > &rhsb[sizeof(rhsb) / sizeof(Char) - 2]) {
|
|
seterror(ERR_RHSLONG);
|
|
return (en);
|
|
}
|
|
if (c == '\\') {
|
|
c = getC(0);
|
|
if (c != delim /* && c != '~' */ )
|
|
*cp++ = '\\';
|
|
}
|
|
*cp++ = c;
|
|
}
|
|
*cp++ = 0;
|
|
break;
|
|
|
|
default:
|
|
if (c == '\n')
|
|
unreadc(c);
|
|
seterror(ERR_BADBANGMOD, c);
|
|
return (en);
|
|
}
|
|
(void) Strcpy(slhs, lhsb);
|
|
if (exclc)
|
|
en = dosub(sc, en, global);
|
|
}
|
|
while ((c = getC(0)) == ':');
|
|
unreadc(c);
|
|
return (en);
|
|
}
|
|
|
|
static struct wordent *
|
|
dosub(sc, en, global)
|
|
int sc;
|
|
struct wordent *en;
|
|
bool global;
|
|
{
|
|
struct wordent lexi;
|
|
bool didsub = 0, didone = 0;
|
|
struct wordent *hp = &lexi;
|
|
register struct wordent *wdp;
|
|
register int i = exclc;
|
|
|
|
wdp = hp;
|
|
while (--i >= 0) {
|
|
register struct wordent *new =
|
|
(struct wordent *) xcalloc(1, sizeof *wdp);
|
|
|
|
new->word = 0;
|
|
new->prev = wdp;
|
|
new->next = hp;
|
|
wdp->next = new;
|
|
wdp = new;
|
|
en = en->next;
|
|
if (en->word) {
|
|
Char *tword, *otword;
|
|
|
|
if ((global & 1) || didsub == 0) {
|
|
tword = subword(en->word, sc, &didone);
|
|
if (didone)
|
|
didsub = 1;
|
|
if (global & 2) {
|
|
while (didone && tword != STRNULL) {
|
|
otword = tword;
|
|
tword = subword(otword, sc, &didone);
|
|
if (Strcmp(tword, otword) == 0) {
|
|
xfree((ptr_t) otword);
|
|
break;
|
|
}
|
|
else
|
|
xfree((ptr_t) otword);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
tword = Strsave(en->word);
|
|
wdp->word = tword;
|
|
}
|
|
}
|
|
if (didsub == 0)
|
|
seterror(ERR_MODFAIL);
|
|
hp->prev = wdp;
|
|
return (&enthist(-1000, &lexi, 0)->Hlex);
|
|
}
|
|
|
|
static Char *
|
|
subword(cp, type, adid)
|
|
Char *cp;
|
|
int type;
|
|
bool *adid;
|
|
{
|
|
Char wbuf[BUFSIZ];
|
|
register Char *wp, *mp, *np;
|
|
register int i;
|
|
|
|
*adid = 0;
|
|
switch (type) {
|
|
|
|
case 'r':
|
|
case 'e':
|
|
case 'h':
|
|
case 't':
|
|
case 'q':
|
|
case 'x':
|
|
wp = domod(cp, type);
|
|
if (wp == 0)
|
|
return (Strsave(cp));
|
|
*adid = 1;
|
|
return (wp);
|
|
|
|
default:
|
|
wp = wbuf;
|
|
i = BUFSIZ - 4;
|
|
for (mp = cp; *mp; mp++)
|
|
if (matchs(mp, lhsb)) {
|
|
for (np = cp; np < mp;)
|
|
*wp++ = *np++, --i;
|
|
for (np = rhsb; *np; np++)
|
|
switch (*np) {
|
|
|
|
case '\\':
|
|
if (np[1] == '&')
|
|
np++;
|
|
/* fall into ... */
|
|
|
|
default:
|
|
if (--i < 0) {
|
|
seterror(ERR_SUBOVFL);
|
|
return (STRNULL);
|
|
}
|
|
*wp++ = *np;
|
|
continue;
|
|
|
|
case '&':
|
|
i -= Strlen(lhsb);
|
|
if (i < 0) {
|
|
seterror(ERR_SUBOVFL);
|
|
return (STRNULL);
|
|
}
|
|
*wp = 0;
|
|
(void) Strcat(wp, lhsb);
|
|
wp = Strend(wp);
|
|
continue;
|
|
}
|
|
mp += Strlen(lhsb);
|
|
i -= Strlen(mp);
|
|
if (i < 0) {
|
|
seterror(ERR_SUBOVFL);
|
|
return (STRNULL);
|
|
}
|
|
*wp = 0;
|
|
(void) Strcat(wp, mp);
|
|
*adid = 1;
|
|
return (Strsave(wbuf));
|
|
}
|
|
return (Strsave(cp));
|
|
}
|
|
}
|
|
|
|
Char *
|
|
domod(cp, type)
|
|
Char *cp;
|
|
int type;
|
|
{
|
|
register Char *wp, *xp;
|
|
register int c;
|
|
|
|
switch (type) {
|
|
|
|
case 'x':
|
|
case 'q':
|
|
wp = Strsave(cp);
|
|
for (xp = wp; (c = *xp) != '\0'; xp++)
|
|
if ((c != ' ' && c != '\t') || type == 'q')
|
|
*xp |= QUOTE;
|
|
return (wp);
|
|
|
|
case 'h':
|
|
case 't':
|
|
if (!any(short2str(cp), '/'))
|
|
return (type == 't' ? Strsave(cp) : 0);
|
|
wp = Strend(cp);
|
|
while (*--wp != '/')
|
|
continue;
|
|
if (type == 'h')
|
|
xp = Strsave(cp), xp[wp - cp] = 0;
|
|
else
|
|
xp = Strsave(wp + 1);
|
|
return (xp);
|
|
|
|
case 'e':
|
|
case 'r':
|
|
wp = Strend(cp);
|
|
for (wp--; wp >= cp && *wp != '/'; wp--)
|
|
if (*wp == '.') {
|
|
if (type == 'e')
|
|
xp = Strsave(wp + 1);
|
|
else
|
|
xp = Strsave(cp), xp[wp - cp] = 0;
|
|
return (xp);
|
|
}
|
|
return (Strsave(type == 'e' ? STRNULL : cp));
|
|
default:
|
|
break;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
matchs(str, pat)
|
|
register Char *str, *pat;
|
|
{
|
|
while (*str && *pat && *str == *pat)
|
|
str++, pat++;
|
|
return (*pat == 0);
|
|
}
|
|
|
|
static int
|
|
getsel(al, ar, dol)
|
|
register int *al, *ar;
|
|
int dol;
|
|
{
|
|
register int c = getC(0);
|
|
register int i;
|
|
bool first = *al < 0;
|
|
|
|
switch (c) {
|
|
|
|
case '%':
|
|
if (quesarg == -1) {
|
|
seterror(ERR_BADBANGARG);
|
|
return (0);
|
|
}
|
|
if (*al < 0)
|
|
*al = quesarg;
|
|
*ar = quesarg;
|
|
break;
|
|
|
|
case '-':
|
|
if (*al < 0) {
|
|
*al = 0;
|
|
*ar = dol - 1;
|
|
unreadc(c);
|
|
}
|
|
return (1);
|
|
|
|
case '^':
|
|
if (*al < 0)
|
|
*al = 1;
|
|
*ar = 1;
|
|
break;
|
|
|
|
case '$':
|
|
if (*al < 0)
|
|
*al = dol;
|
|
*ar = dol;
|
|
break;
|
|
|
|
case '*':
|
|
if (*al < 0)
|
|
*al = 1;
|
|
*ar = dol;
|
|
if (*ar < *al) {
|
|
*ar = 0;
|
|
*al = 1;
|
|
return (1);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
if (Isdigit(c)) {
|
|
i = 0;
|
|
while (Isdigit(c)) {
|
|
i = i * 10 + c - '0';
|
|
c = getC(0);
|
|
}
|
|
if (i < 0)
|
|
i = dol + 1;
|
|
if (*al < 0)
|
|
*al = i;
|
|
*ar = i;
|
|
}
|
|
else if (*al < 0)
|
|
*al = 0, *ar = dol;
|
|
else
|
|
*ar = dol - 1;
|
|
unreadc(c);
|
|
break;
|
|
}
|
|
if (first) {
|
|
c = getC(0);
|
|
unreadc(c);
|
|
if (any("-$*", c))
|
|
return (1);
|
|
}
|
|
if (*al > *ar || *ar > dol) {
|
|
seterror(ERR_BADBANGARG);
|
|
return (0);
|
|
}
|
|
return (1);
|
|
|
|
}
|
|
|
|
static struct wordent *
|
|
gethent(sc)
|
|
int sc;
|
|
{
|
|
register struct Hist *hp;
|
|
register Char *np;
|
|
register int c;
|
|
int event;
|
|
bool back = 0;
|
|
|
|
c = sc == HISTSUB ? HIST : getC(0);
|
|
if (c == HIST) {
|
|
if (alhistp)
|
|
return (alhistp);
|
|
event = eventno;
|
|
}
|
|
else
|
|
switch (c) {
|
|
|
|
case ':':
|
|
case '^':
|
|
case '$':
|
|
case '*':
|
|
case '%':
|
|
ungetC(c);
|
|
if (lastev == eventno && alhistp)
|
|
return (alhistp);
|
|
event = lastev;
|
|
break;
|
|
|
|
case '#': /* !# is command being typed in (mrh) */
|
|
if (--hleft == 0) {
|
|
seterror(ERR_HISTLOOP);
|
|
return (0);
|
|
}
|
|
else
|
|
return (¶ml);
|
|
/* NOTREACHED */
|
|
|
|
case '-':
|
|
back = 1;
|
|
c = getC(0);
|
|
/* FALLSTHROUGH */
|
|
|
|
default:
|
|
if (any("(=~", c)) {
|
|
unreadc(c);
|
|
ungetC(HIST);
|
|
return (0);
|
|
}
|
|
np = lhsb;
|
|
event = 0;
|
|
while (!cmap(c, _ESC | _META | _QF | _QB) && !any("${}:", c)) {
|
|
if (event != -1 && Isdigit(c))
|
|
event = event * 10 + c - '0';
|
|
else
|
|
event = -1;
|
|
if (np < &lhsb[sizeof(lhsb) / sizeof(Char) - 2])
|
|
*np++ = c;
|
|
c = getC(0);
|
|
}
|
|
unreadc(c);
|
|
if (np == lhsb) {
|
|
ungetC(HIST);
|
|
return (0);
|
|
}
|
|
*np++ = 0;
|
|
if (event != -1) {
|
|
/*
|
|
* History had only digits
|
|
*/
|
|
if (back)
|
|
event = eventno + (alhistp == 0) - (event ? event : 0);
|
|
break;
|
|
}
|
|
hp = findev(lhsb, 0);
|
|
if (hp)
|
|
lastev = hp->Hnum;
|
|
return (&hp->Hlex);
|
|
|
|
case '?':
|
|
np = lhsb;
|
|
for (;;) {
|
|
c = getC(0);
|
|
if (c == '\n') {
|
|
unreadc(c);
|
|
break;
|
|
}
|
|
if (c == '?')
|
|
break;
|
|
if (np < &lhsb[sizeof(lhsb) / sizeof(Char) - 2])
|
|
*np++ = c;
|
|
}
|
|
if (np == lhsb) {
|
|
if (lhsb[0] == 0) {
|
|
seterror(ERR_NOSEARCH);
|
|
return (0);
|
|
}
|
|
}
|
|
else
|
|
*np++ = 0;
|
|
hp = findev(lhsb, 1);
|
|
if (hp)
|
|
lastev = hp->Hnum;
|
|
return (&hp->Hlex);
|
|
}
|
|
|
|
for (hp = Histlist.Hnext; hp; hp = hp->Hnext)
|
|
if (hp->Hnum == event) {
|
|
hp->Href = eventno;
|
|
lastev = hp->Hnum;
|
|
return (&hp->Hlex);
|
|
}
|
|
np = putn(event);
|
|
seterror(ERR_NOEVENT, vis_str(np));
|
|
return (0);
|
|
}
|
|
|
|
static struct Hist *
|
|
findev(cp, anyarg)
|
|
Char *cp;
|
|
bool anyarg;
|
|
{
|
|
register struct Hist *hp;
|
|
|
|
for (hp = Histlist.Hnext; hp; hp = hp->Hnext) {
|
|
Char *dp;
|
|
register Char *p, *q;
|
|
register struct wordent *lp = hp->Hlex.next;
|
|
int argno = 0;
|
|
|
|
/*
|
|
* The entries added by alias substitution don't have a newline but do
|
|
* have a negative event number. Savehist() trims off these entries,
|
|
* but it happens before alias expansion, too early to delete those
|
|
* from the previous command.
|
|
*/
|
|
if (hp->Hnum < 0)
|
|
continue;
|
|
if (lp->word[0] == '\n')
|
|
continue;
|
|
if (!anyarg) {
|
|
p = cp;
|
|
q = lp->word;
|
|
do
|
|
if (!*p)
|
|
return (hp);
|
|
while (*p++ == *q++);
|
|
continue;
|
|
}
|
|
do {
|
|
for (dp = lp->word; *dp; dp++) {
|
|
p = cp;
|
|
q = dp;
|
|
do
|
|
if (!*p) {
|
|
quesarg = argno;
|
|
return (hp);
|
|
}
|
|
while (*p++ == *q++);
|
|
}
|
|
lp = lp->next;
|
|
argno++;
|
|
} while (lp->word[0] != '\n');
|
|
}
|
|
seterror(ERR_NOEVENT, vis_str(cp));
|
|
return (0);
|
|
}
|
|
|
|
|
|
static void
|
|
setexclp(cp)
|
|
register Char *cp;
|
|
{
|
|
if (cp && cp[0] == '\n')
|
|
return;
|
|
exclp = cp;
|
|
}
|
|
|
|
void
|
|
unreadc(c)
|
|
int c;
|
|
{
|
|
peekread = c;
|
|
}
|
|
|
|
int
|
|
readc(wanteof)
|
|
bool wanteof;
|
|
{
|
|
register int c;
|
|
static sincereal;
|
|
|
|
aret = F_SEEK;
|
|
if ((c = peekread) != '\0') {
|
|
peekread = 0;
|
|
return (c);
|
|
}
|
|
top:
|
|
aret = F_SEEK;
|
|
if (alvecp) {
|
|
aret = A_SEEK;
|
|
if ((c = *alvecp++) != '\0')
|
|
return (c);
|
|
if (alvec && *alvec) {
|
|
alvecp = *alvec++;
|
|
return (' ');
|
|
}
|
|
else {
|
|
aret = F_SEEK;
|
|
alvecp = NULL;
|
|
return('\n');
|
|
}
|
|
}
|
|
if (alvec) {
|
|
if ((alvecp = *alvec) != '\0') {
|
|
alvec++;
|
|
goto top;
|
|
}
|
|
/* Infinite source! */
|
|
return ('\n');
|
|
}
|
|
if (evalp) {
|
|
aret = E_SEEK;
|
|
if ((c = *evalp++) != '\0')
|
|
return (c);
|
|
if (evalvec && *evalvec) {
|
|
evalp = *evalvec++;
|
|
return (' ');
|
|
}
|
|
aret = F_SEEK;
|
|
evalp = 0;
|
|
}
|
|
if (evalvec) {
|
|
if (evalvec == (Char **) 1) {
|
|
doneinp = 1;
|
|
reset();
|
|
}
|
|
if ((evalp = *evalvec) != '\0') {
|
|
evalvec++;
|
|
goto top;
|
|
}
|
|
evalvec = (Char **) 1;
|
|
return ('\n');
|
|
}
|
|
do {
|
|
if (arginp == (Char *) 1 || onelflg == 1) {
|
|
if (wanteof)
|
|
return (-1);
|
|
exitstat();
|
|
}
|
|
if (arginp) {
|
|
if ((c = *arginp++) == 0) {
|
|
arginp = (Char *) 1;
|
|
return ('\n');
|
|
}
|
|
return (c);
|
|
}
|
|
reread:
|
|
c = bgetc();
|
|
if (c < 0) {
|
|
struct termios tty;
|
|
if (wanteof)
|
|
return (-1);
|
|
/* was isatty but raw with ignoreeof yields problems */
|
|
if (tcgetattr(SHIN, &tty) == 0 && (tty.c_lflag & ICANON))
|
|
{
|
|
/* was 'short' for FILEC */
|
|
int ctpgrp;
|
|
|
|
if (++sincereal > 25)
|
|
goto oops;
|
|
if (tpgrp != -1 &&
|
|
(ctpgrp = tcgetpgrp(FSHTTY)) != -1 &&
|
|
tpgrp != ctpgrp) {
|
|
(void) tcsetpgrp(FSHTTY, tpgrp);
|
|
(void) killpg((pid_t) ctpgrp, SIGHUP);
|
|
(void) fprintf(csherr, "Reset tty pgrp from %d to %d\n",
|
|
ctpgrp, tpgrp);
|
|
goto reread;
|
|
}
|
|
if (adrof(STRignoreeof)) {
|
|
if (loginsh)
|
|
(void) fprintf(csherr,"\nUse \"logout\" to logout.\n");
|
|
else
|
|
(void) fprintf(csherr,"\nUse \"exit\" to leave csh.\n");
|
|
reset();
|
|
}
|
|
if (chkstop == 0)
|
|
panystop(1);
|
|
}
|
|
oops:
|
|
doneinp = 1;
|
|
reset();
|
|
}
|
|
sincereal = 0;
|
|
if (c == '\n' && onelflg)
|
|
onelflg--;
|
|
} while (c == 0);
|
|
return (c);
|
|
}
|
|
|
|
static int
|
|
bgetc()
|
|
{
|
|
register int buf, off, c;
|
|
|
|
#ifdef FILEC
|
|
register int numleft = 0, roomleft;
|
|
Char ttyline[BUFSIZ];
|
|
#endif
|
|
char tbuf[BUFSIZ + 1];
|
|
|
|
if (cantell) {
|
|
if (fseekp < fbobp || fseekp > feobp) {
|
|
fbobp = feobp = fseekp;
|
|
(void) lseek(SHIN, fseekp, L_SET);
|
|
}
|
|
if (fseekp == feobp) {
|
|
int i;
|
|
|
|
fbobp = feobp;
|
|
do
|
|
c = read(SHIN, tbuf, BUFSIZ);
|
|
while (c < 0 && errno == EINTR);
|
|
if (c <= 0)
|
|
return (-1);
|
|
for (i = 0; i < c; i++)
|
|
fbuf[0][i] = (unsigned char) tbuf[i];
|
|
feobp += c;
|
|
}
|
|
c = fbuf[0][fseekp - fbobp];
|
|
fseekp++;
|
|
return (c);
|
|
}
|
|
|
|
again:
|
|
buf = (int) fseekp / BUFSIZ;
|
|
if (buf >= fblocks) {
|
|
register Char **nfbuf =
|
|
(Char **) xcalloc((size_t) (fblocks + 2),
|
|
sizeof(Char **));
|
|
|
|
if (fbuf) {
|
|
(void) blkcpy(nfbuf, fbuf);
|
|
xfree((ptr_t) fbuf);
|
|
}
|
|
fbuf = nfbuf;
|
|
fbuf[fblocks] = (Char *) xcalloc(BUFSIZ, sizeof(Char));
|
|
fblocks++;
|
|
if (!intty)
|
|
goto again;
|
|
}
|
|
if (fseekp >= feobp) {
|
|
buf = (int) feobp / BUFSIZ;
|
|
off = (int) feobp % BUFSIZ;
|
|
roomleft = BUFSIZ - off;
|
|
|
|
#ifdef FILEC
|
|
roomleft = BUFSIZ - off;
|
|
for (;;) {
|
|
if (filec && intty) {
|
|
c = numleft ? numleft : tenex(ttyline, BUFSIZ);
|
|
if (c > roomleft) {
|
|
/* start with fresh buffer */
|
|
feobp = fseekp = fblocks * BUFSIZ;
|
|
numleft = c;
|
|
goto again;
|
|
}
|
|
if (c > 0)
|
|
bcopy(ttyline, fbuf[buf] + off, c * sizeof(Char));
|
|
numleft = 0;
|
|
}
|
|
else {
|
|
#endif
|
|
c = read(SHIN, tbuf, roomleft);
|
|
if (c > 0) {
|
|
int i;
|
|
Char *ptr = fbuf[buf] + off;
|
|
|
|
for (i = 0; i < c; i++)
|
|
ptr[i] = (unsigned char) tbuf[i];
|
|
}
|
|
#ifdef FILEC
|
|
}
|
|
#endif
|
|
if (c >= 0)
|
|
break;
|
|
if (errno == EWOULDBLOCK) {
|
|
int off = 0;
|
|
|
|
(void) ioctl(SHIN, FIONBIO, (ioctl_t) & off);
|
|
}
|
|
else if (errno != EINTR)
|
|
break;
|
|
}
|
|
if (c <= 0)
|
|
return (-1);
|
|
feobp += c;
|
|
#ifndef FILEC
|
|
goto again;
|
|
#else
|
|
if (filec && !intty)
|
|
goto again;
|
|
#endif
|
|
}
|
|
c = fbuf[buf][(int) fseekp % BUFSIZ];
|
|
fseekp++;
|
|
return (c);
|
|
}
|
|
|
|
static void
|
|
bfree()
|
|
{
|
|
register int sb, i;
|
|
|
|
if (cantell)
|
|
return;
|
|
if (whyles)
|
|
return;
|
|
sb = (int) (fseekp - 1) / BUFSIZ;
|
|
if (sb > 0) {
|
|
for (i = 0; i < sb; i++)
|
|
xfree((ptr_t) fbuf[i]);
|
|
(void) blkcpy(fbuf, &fbuf[sb]);
|
|
fseekp -= BUFSIZ * sb;
|
|
feobp -= BUFSIZ * sb;
|
|
fblocks -= sb;
|
|
}
|
|
}
|
|
|
|
void
|
|
bseek(l)
|
|
struct Ain *l;
|
|
{
|
|
switch (aret = l->type) {
|
|
case E_SEEK:
|
|
evalvec = l->a_seek;
|
|
evalp = l->c_seek;
|
|
return;
|
|
case A_SEEK:
|
|
alvec = l->a_seek;
|
|
alvecp = l->c_seek;
|
|
return;
|
|
case F_SEEK:
|
|
fseekp = l->f_seek;
|
|
return;
|
|
default:
|
|
(void) fprintf(csherr, "Bad seek type %d\n", aret);
|
|
abort();
|
|
}
|
|
}
|
|
|
|
void
|
|
btell(l)
|
|
struct Ain *l;
|
|
{
|
|
switch (l->type = aret) {
|
|
case E_SEEK:
|
|
l->a_seek = evalvec;
|
|
l->c_seek = evalp;
|
|
return;
|
|
case A_SEEK:
|
|
l->a_seek = alvec;
|
|
l->c_seek = alvecp;
|
|
return;
|
|
case F_SEEK:
|
|
l->f_seek = fseekp;
|
|
l->a_seek = NULL;
|
|
return;
|
|
default:
|
|
(void) fprintf(csherr, "Bad seek type %d\n", aret);
|
|
abort();
|
|
}
|
|
}
|
|
|
|
void
|
|
btoeof()
|
|
{
|
|
(void) lseek(SHIN, (off_t) 0, L_XTND);
|
|
aret = F_SEEK;
|
|
fseekp = feobp;
|
|
alvec = NULL;
|
|
alvecp = NULL;
|
|
evalvec = NULL;
|
|
evalp = NULL;
|
|
wfree();
|
|
bfree();
|
|
}
|
|
|
|
void
|
|
settell()
|
|
{
|
|
cantell = 0;
|
|
if (arginp || onelflg || intty)
|
|
return;
|
|
if (lseek(SHIN, (off_t) 0, L_INCR) < 0 || errno == ESPIPE)
|
|
return;
|
|
fbuf = (Char **) xcalloc(2, sizeof(Char **));
|
|
fblocks = 1;
|
|
fbuf[0] = (Char *) xcalloc(BUFSIZ, sizeof(Char));
|
|
fseekp = fbobp = feobp = lseek(SHIN, (off_t) 0, L_INCR);
|
|
cantell = 1;
|
|
}
|