991 lines
20 KiB
C
991 lines
20 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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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)dol.c 8.1 (Berkeley) 5/31/93";
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#else
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static const char rcsid[] =
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"$Id: dol.c,v 1.7 1998/05/06 06:50:39 charnier Exp $";
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#endif
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#endif /* not lint */
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#include <sys/types.h>
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#include <fcntl.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 routines perform variable substitution and quoting via ' and ".
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* To this point these constructs have been preserved in the divided
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* input words. Here we expand variables and turn quoting via ' and " into
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* QUOTE bits on characters (which prevent further interpretation).
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* If the `:q' modifier was applied during history expansion, then
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* some QUOTEing may have occurred already, so we dont "trim()" here.
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*/
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static int Dpeekc, Dpeekrd; /* Peeks for DgetC and Dreadc */
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static Char *Dcp, **Dvp; /* Input vector for Dreadc */
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#define DEOF -1
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#define unDgetC(c) Dpeekc = c
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#define QUOTES (_QF|_QB|_ESC) /* \ ' " ` */
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/*
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* The following variables give the information about the current
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* $ expansion, recording the current word position, the remaining
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* words within this expansion, the count of remaining words, and the
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* information about any : modifier which is being applied.
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*/
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#define MAXWLEN (BUFSIZ - 4)
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#define MAXMOD MAXWLEN /* This cannot overflow */
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static Char *dolp; /* Remaining chars from this word */
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static Char **dolnxt; /* Further words */
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static int dolcnt; /* Count of further words */
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static Char dolmod[MAXMOD]; /* : modifier character */
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static int dolnmod; /* Number of modifiers */
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static int dolmcnt; /* :gx -> 10000, else 1 */
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static int dolwcnt; /* :wx -> 10000, else 1 */
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static void Dfix2 __P((Char **));
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static Char *Dpack __P((Char *, Char *));
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static int Dword __P((void));
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static void dolerror __P((Char *));
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static int DgetC __P((int));
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static void Dgetdol __P((void));
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static void fixDolMod __P((void));
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static void setDolp __P((Char *));
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static void unDredc __P((int));
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static int Dredc __P((void));
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static void Dtestq __P((int));
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/*
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* Fix up the $ expansions and quotations in the
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* argument list to command t.
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*/
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void
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Dfix(t)
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struct command *t;
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{
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Char **pp;
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Char *p;
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if (noexec)
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return;
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/* Note that t_dcom isn't trimmed thus !...:q's aren't lost */
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for (pp = t->t_dcom; (p = *pp++) != NULL;)
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for (; *p; p++) {
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if (cmap(*p, _DOL | QUOTES)) { /* $, \, ', ", ` */
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Dfix2(t->t_dcom); /* found one */
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blkfree(t->t_dcom);
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t->t_dcom = gargv;
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gargv = 0;
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return;
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}
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}
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}
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/*
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* $ substitute one word, for i/o redirection
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*/
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Char *
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Dfix1(cp)
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Char *cp;
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{
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Char *Dv[2];
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if (noexec)
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return (0);
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Dv[0] = cp;
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Dv[1] = NULL;
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Dfix2(Dv);
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if (gargc != 1) {
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setname(vis_str(cp));
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stderror(ERR_NAME | ERR_AMBIG);
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}
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cp = Strsave(gargv[0]);
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blkfree(gargv), gargv = 0;
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return (cp);
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}
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/*
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* Subroutine to do actual fixing after state initialization.
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*/
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static void
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Dfix2(v)
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Char **v;
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{
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ginit(); /* Initialize glob's area pointers */
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Dvp = v;
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Dcp = STRNULL; /* Setup input vector for Dreadc */
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unDgetC(0);
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unDredc(0); /* Clear out any old peeks (at error) */
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dolp = 0;
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dolcnt = 0; /* Clear out residual $ expands (...) */
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while (Dword())
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continue;
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}
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/*
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* Pack up more characters in this word
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*/
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static Char *
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Dpack(wbuf, wp)
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Char *wbuf, *wp;
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{
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int c;
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int i = MAXWLEN - (wp - wbuf);
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for (;;) {
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c = DgetC(DODOL);
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if (c == '\\') {
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c = DgetC(0);
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if (c == DEOF) {
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unDredc(c);
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*wp = 0;
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Gcat(STRNULL, wbuf);
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return (NULL);
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}
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if (c == '\n')
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c = ' ';
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else
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c |= QUOTE;
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}
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if (c == DEOF) {
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unDredc(c);
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*wp = 0;
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Gcat(STRNULL, wbuf);
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return (NULL);
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}
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if (cmap(c, _SP | _NL | _QF | _QB)) { /* sp \t\n'"` */
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unDgetC(c);
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if (cmap(c, QUOTES))
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return (wp);
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*wp++ = 0;
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Gcat(STRNULL, wbuf);
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return (NULL);
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}
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if (--i <= 0)
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stderror(ERR_WTOOLONG);
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*wp++ = c;
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}
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}
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/*
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* Get a word. This routine is analogous to the routine
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* word() in sh.lex.c for the main lexical input. One difference
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* here is that we don't get a newline to terminate our expansion.
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* Rather, DgetC will return a DEOF when we hit the end-of-input.
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*/
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static int
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Dword()
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{
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int c, c1;
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Char wbuf[BUFSIZ];
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Char *wp = wbuf;
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int i = MAXWLEN;
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bool dolflg;
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bool sofar = 0, done = 0;
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while (!done) {
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done = 1;
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c = DgetC(DODOL);
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switch (c) {
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case DEOF:
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if (sofar == 0)
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return (0);
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/* finish this word and catch the code above the next time */
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unDredc(c);
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/* fall into ... */
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case '\n':
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*wp = 0;
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Gcat(STRNULL, wbuf);
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return (1);
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case ' ':
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case '\t':
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done = 0;
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break;
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case '`':
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/* We preserve ` quotations which are done yet later */
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*wp++ = c, --i;
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case '\'':
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case '"':
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/*
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* Note that DgetC never returns a QUOTES character from an
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* expansion, so only true input quotes will get us here or out.
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*/
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c1 = c;
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dolflg = c1 == '"' ? DODOL : 0;
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for (;;) {
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c = DgetC(dolflg);
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if (c == c1)
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break;
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if (c == '\n' || c == DEOF)
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stderror(ERR_UNMATCHED, c1);
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if ((c & (QUOTE | TRIM)) == ('\n' | QUOTE))
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--wp, ++i;
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if (--i <= 0)
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stderror(ERR_WTOOLONG);
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switch (c1) {
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case '"':
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/*
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* Leave any `s alone for later. Other chars are all
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* quoted, thus `...` can tell it was within "...".
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*/
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*wp++ = c == '`' ? '`' : c | QUOTE;
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break;
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case '\'':
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/* Prevent all further interpretation */
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*wp++ = c | QUOTE;
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break;
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case '`':
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/* Leave all text alone for later */
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*wp++ = c;
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break;
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default:
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break;
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}
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}
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if (c1 == '`')
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*wp++ = '`' /* i--; eliminated */;
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sofar = 1;
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if ((wp = Dpack(wbuf, wp)) == NULL)
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return (1);
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else {
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i = MAXWLEN - (wp - wbuf);
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done = 0;
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}
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break;
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case '\\':
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c = DgetC(0); /* No $ subst! */
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if (c == '\n' || c == DEOF) {
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done = 0;
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break;
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}
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c |= QUOTE;
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break;
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default:
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break;
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}
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if (done) {
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unDgetC(c);
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sofar = 1;
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if ((wp = Dpack(wbuf, wp)) == NULL)
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return (1);
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else {
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i = MAXWLEN - (wp - wbuf);
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done = 0;
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}
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}
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}
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/* Really NOTREACHED */
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return (0);
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}
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/*
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* Get a character, performing $ substitution unless flag is 0.
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* Any QUOTES character which is returned from a $ expansion is
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* QUOTEd so that it will not be recognized above.
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*/
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static int
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DgetC(flag)
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int flag;
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{
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int c;
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top:
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if ((c = Dpeekc) != '\0') {
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Dpeekc = 0;
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return (c);
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}
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if (lap) {
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c = *lap++ & (QUOTE | TRIM);
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if (c == 0) {
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lap = 0;
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goto top;
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}
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quotspec:
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if (cmap(c, QUOTES))
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return (c | QUOTE);
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return (c);
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}
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if (dolp) {
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if ((c = *dolp++ & (QUOTE | TRIM)) != '\0')
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goto quotspec;
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if (dolcnt > 0) {
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setDolp(*dolnxt++);
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--dolcnt;
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return (' ');
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}
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dolp = 0;
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}
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if (dolcnt > 0) {
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setDolp(*dolnxt++);
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--dolcnt;
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goto top;
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}
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c = Dredc();
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if (c == '$' && flag) {
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Dgetdol();
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goto top;
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}
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return (c);
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}
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static Char *nulvec[] = {0};
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static struct varent nulargv = {nulvec, STRargv, { NULL, NULL, NULL }, 0};
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static void
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dolerror(s)
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Char *s;
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{
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setname(vis_str(s));
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stderror(ERR_NAME | ERR_RANGE);
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}
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/*
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* Handle the multitudinous $ expansion forms.
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* Ugh.
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*/
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static void
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Dgetdol()
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{
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Char *np;
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struct varent *vp = NULL;
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Char name[4 * MAXVARLEN + 1];
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int c, sc;
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int subscr = 0, lwb = 1, upb = 0;
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bool dimen = 0, bitset = 0;
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char tnp;
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Char wbuf[BUFSIZ];
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static Char *dolbang = NULL;
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dolnmod = dolmcnt = dolwcnt = 0;
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c = sc = DgetC(0);
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if (c == '{')
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c = DgetC(0); /* sc is { to take } later */
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if ((c & TRIM) == '#')
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dimen++, c = DgetC(0); /* $# takes dimension */
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else if (c == '?')
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bitset++, c = DgetC(0); /* $? tests existence */
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switch (c) {
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case '!':
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if (dimen || bitset)
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stderror(ERR_SYNTAX);
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if (backpid != 0) {
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if (dolbang)
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xfree((ptr_t) dolbang);
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setDolp(dolbang = putn(backpid));
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}
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goto eatbrac;
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case '$':
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if (dimen || bitset)
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stderror(ERR_SYNTAX);
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setDolp(doldol);
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goto eatbrac;
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case '<' | QUOTE:
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if (bitset)
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stderror(ERR_NOTALLOWED, "$?<");
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if (dimen)
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stderror(ERR_NOTALLOWED, "$?#");
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for (np = wbuf; read(OLDSTD, &tnp, 1) == 1; np++) {
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*np = (unsigned char) tnp;
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if (np >= &wbuf[BUFSIZ - 1])
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stderror(ERR_LTOOLONG);
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if (tnp == '\n')
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break;
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}
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*np = 0;
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/*
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* KLUDGE: dolmod is set here because it will cause setDolp to call
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* domod and thus to copy wbuf. Otherwise setDolp would use it
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* directly. If we saved it ourselves, no one would know when to free
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* it. The actual function of the 'q' causes filename expansion not to
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* be done on the interpolated value.
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*/
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dolmod[dolnmod++] = 'q';
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dolmcnt = 10000;
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setDolp(wbuf);
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goto eatbrac;
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case DEOF:
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case '\n':
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stderror(ERR_SYNTAX);
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/* NOTREACHED */
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break;
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case '*':
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(void) Strcpy(name, STRargv);
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vp = adrof(STRargv);
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subscr = -1; /* Prevent eating [...] */
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break;
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default:
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np = name;
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if (Isdigit(c)) {
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if (dimen)
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stderror(ERR_NOTALLOWED, "$#<num>");
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subscr = 0;
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do {
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subscr = subscr * 10 + c - '0';
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c = DgetC(0);
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} while (Isdigit(c));
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unDredc(c);
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if (subscr < 0) {
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dolerror(vp->v_name);
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return;
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}
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if (subscr == 0) {
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if (bitset) {
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dolp = ffile ? STR1 : STR0;
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goto eatbrac;
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}
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if (ffile == 0)
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stderror(ERR_DOLZERO);
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fixDolMod();
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setDolp(ffile);
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goto eatbrac;
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}
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if (bitset)
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stderror(ERR_DOLQUEST);
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vp = adrof(STRargv);
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if (vp == 0) {
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vp = &nulargv;
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goto eatmod;
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}
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break;
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}
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if (!alnum(c))
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stderror(ERR_VARALNUM);
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for (;;) {
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*np++ = c;
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c = DgetC(0);
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if (!alnum(c))
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break;
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if (np >= &name[MAXVARLEN])
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stderror(ERR_VARTOOLONG);
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}
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*np++ = 0;
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unDredc(c);
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vp = adrof(name);
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}
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if (bitset) {
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dolp = (vp || getenv(short2str(name))) ? STR1 : STR0;
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goto eatbrac;
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}
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if (vp == 0) {
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np = str2short(getenv(short2str(name)));
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if (np) {
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fixDolMod();
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setDolp(np);
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goto eatbrac;
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}
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udvar(name);
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/* NOTREACHED */
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}
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c = DgetC(0);
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upb = blklen(vp->vec);
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if (dimen == 0 && subscr == 0 && c == '[') {
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np = name;
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for (;;) {
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c = DgetC(DODOL); /* Allow $ expand within [ ] */
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if (c == ']')
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break;
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if (c == '\n' || c == DEOF)
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stderror(ERR_INCBR);
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if (np >= &name[sizeof(name) / sizeof(Char) - 2])
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stderror(ERR_VARTOOLONG);
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*np++ = c;
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|
}
|
|
*np = 0, np = name;
|
|
if (dolp || dolcnt) /* $ exp must end before ] */
|
|
stderror(ERR_EXPORD);
|
|
if (!*np)
|
|
stderror(ERR_SYNTAX);
|
|
if (Isdigit(*np)) {
|
|
int i;
|
|
|
|
for (i = 0; Isdigit(*np); i = i * 10 + *np++ - '0')
|
|
continue;
|
|
if ((i < 0 || i > upb) && !any("-*", *np)) {
|
|
dolerror(vp->v_name);
|
|
return;
|
|
}
|
|
lwb = i;
|
|
if (!*np)
|
|
upb = lwb, np = STRstar;
|
|
}
|
|
if (*np == '*')
|
|
np++;
|
|
else if (*np != '-')
|
|
stderror(ERR_MISSING, '-');
|
|
else {
|
|
int i = upb;
|
|
|
|
np++;
|
|
if (Isdigit(*np)) {
|
|
i = 0;
|
|
while (Isdigit(*np))
|
|
i = i * 10 + *np++ - '0';
|
|
if (i < 0 || i > upb) {
|
|
dolerror(vp->v_name);
|
|
return;
|
|
}
|
|
}
|
|
if (i < lwb)
|
|
upb = lwb - 1;
|
|
else
|
|
upb = i;
|
|
}
|
|
if (lwb == 0) {
|
|
if (upb != 0) {
|
|
dolerror(vp->v_name);
|
|
return;
|
|
}
|
|
upb = -1;
|
|
}
|
|
if (*np)
|
|
stderror(ERR_SYNTAX);
|
|
}
|
|
else {
|
|
if (subscr > 0)
|
|
if (subscr > upb)
|
|
lwb = 1, upb = 0;
|
|
else
|
|
lwb = upb = subscr;
|
|
unDredc(c);
|
|
}
|
|
if (dimen) {
|
|
Char *cp = putn(upb - lwb + 1);
|
|
|
|
addla(cp);
|
|
xfree((ptr_t) cp);
|
|
}
|
|
else {
|
|
eatmod:
|
|
fixDolMod();
|
|
dolnxt = &vp->vec[lwb - 1];
|
|
dolcnt = upb - lwb + 1;
|
|
}
|
|
eatbrac:
|
|
if (sc == '{') {
|
|
c = Dredc();
|
|
if (c != '}')
|
|
stderror(ERR_MISSING, '}');
|
|
}
|
|
}
|
|
|
|
static void
|
|
fixDolMod()
|
|
{
|
|
int c;
|
|
|
|
c = DgetC(0);
|
|
if (c == ':') {
|
|
do {
|
|
c = DgetC(0), dolmcnt = 1, dolwcnt = 1;
|
|
if (c == 'g' || c == 'a') {
|
|
if (c == 'g')
|
|
dolmcnt = 10000;
|
|
else
|
|
dolwcnt = 10000;
|
|
c = DgetC(0);
|
|
}
|
|
if ((c == 'g' && dolmcnt != 10000) ||
|
|
(c == 'a' && dolwcnt != 10000)) {
|
|
if (c == 'g')
|
|
dolmcnt = 10000;
|
|
else
|
|
dolwcnt = 10000;
|
|
c = DgetC(0);
|
|
}
|
|
|
|
if (c == 's') { /* [eichin:19910926.0755EST] */
|
|
int delimcnt = 2;
|
|
int delim = DgetC(0);
|
|
dolmod[dolnmod++] = c;
|
|
dolmod[dolnmod++] = delim;
|
|
|
|
if (!delim || letter(delim)
|
|
|| Isdigit(delim) || any(" \t\n", delim)) {
|
|
seterror(ERR_BADSUBST);
|
|
break;
|
|
}
|
|
while ((c = DgetC(0)) != (-1)) {
|
|
dolmod[dolnmod++] = c;
|
|
if(c == delim) delimcnt--;
|
|
if(!delimcnt) break;
|
|
}
|
|
if(delimcnt) {
|
|
seterror(ERR_BADSUBST);
|
|
break;
|
|
}
|
|
continue;
|
|
}
|
|
if (!any("htrqxes", c))
|
|
stderror(ERR_BADMOD, c);
|
|
dolmod[dolnmod++] = c;
|
|
if (c == 'q')
|
|
dolmcnt = 10000;
|
|
}
|
|
while ((c = DgetC(0)) == ':');
|
|
unDredc(c);
|
|
}
|
|
else
|
|
unDredc(c);
|
|
}
|
|
|
|
static void
|
|
setDolp(cp)
|
|
Char *cp;
|
|
{
|
|
Char *dp;
|
|
int i;
|
|
|
|
if (dolnmod == 0 || dolmcnt == 0) {
|
|
dolp = cp;
|
|
return;
|
|
}
|
|
dp = cp = Strsave(cp);
|
|
for (i = 0; i < dolnmod; i++) {
|
|
/* handle s// [eichin:19910926.0510EST] */
|
|
if(dolmod[i] == 's') {
|
|
int delim;
|
|
Char *lhsub, *rhsub, *np;
|
|
size_t lhlen = 0, rhlen = 0;
|
|
int didmod = 0;
|
|
|
|
delim = dolmod[++i];
|
|
if (!delim || letter(delim)
|
|
|| Isdigit(delim) || any(" \t\n", delim)) {
|
|
seterror(ERR_BADSUBST);
|
|
break;
|
|
}
|
|
lhsub = &dolmod[++i];
|
|
while(dolmod[i] != delim && dolmod[++i]) {
|
|
lhlen++;
|
|
}
|
|
dolmod[i] = 0;
|
|
rhsub = &dolmod[++i];
|
|
while(dolmod[i] != delim && dolmod[++i]) {
|
|
rhlen++;
|
|
}
|
|
dolmod[i] = 0;
|
|
|
|
do {
|
|
dp = Strstr(cp, lhsub);
|
|
if (dp) {
|
|
np = (Char *) xmalloc((size_t)
|
|
((Strlen(cp) + 1 - lhlen + rhlen) *
|
|
sizeof(Char)));
|
|
(void) Strncpy(np, cp, dp - cp);
|
|
(void) Strcpy(np + (dp - cp), rhsub);
|
|
(void) Strcpy(np + (dp - cp) + rhlen, dp + lhlen);
|
|
|
|
xfree((ptr_t) cp);
|
|
dp = cp = np;
|
|
didmod = 1;
|
|
} else {
|
|
/* should this do a seterror? */
|
|
break;
|
|
}
|
|
}
|
|
while (dolwcnt == 10000);
|
|
/*
|
|
* restore dolmod for additional words
|
|
*/
|
|
dolmod[i] = rhsub[-1] = delim;
|
|
if (didmod)
|
|
dolmcnt--;
|
|
else
|
|
break;
|
|
} else {
|
|
int didmod = 0;
|
|
|
|
do {
|
|
if ((dp = domod(cp, dolmod[i]))) {
|
|
didmod = 1;
|
|
if (Strcmp(cp, dp) == 0) {
|
|
xfree((ptr_t) cp);
|
|
cp = dp;
|
|
break;
|
|
}
|
|
else {
|
|
xfree((ptr_t) cp);
|
|
cp = dp;
|
|
}
|
|
}
|
|
else
|
|
break;
|
|
}
|
|
while (dolwcnt == 10000);
|
|
dp = cp;
|
|
if (didmod)
|
|
dolmcnt--;
|
|
else
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (dp) {
|
|
addla(dp);
|
|
xfree((ptr_t) dp);
|
|
}
|
|
else
|
|
addla(cp);
|
|
|
|
dolp = STRNULL;
|
|
if (seterr)
|
|
stderror(ERR_OLD);
|
|
}
|
|
|
|
static void
|
|
unDredc(c)
|
|
int c;
|
|
{
|
|
|
|
Dpeekrd = c;
|
|
}
|
|
|
|
static int
|
|
Dredc()
|
|
{
|
|
int c;
|
|
|
|
if ((c = Dpeekrd) != '\0') {
|
|
Dpeekrd = 0;
|
|
return (c);
|
|
}
|
|
if (Dcp && (c = *Dcp++))
|
|
return (c & (QUOTE | TRIM));
|
|
if (*Dvp == 0) {
|
|
Dcp = 0;
|
|
return (DEOF);
|
|
}
|
|
Dcp = *Dvp++;
|
|
return (' ');
|
|
}
|
|
|
|
static void
|
|
Dtestq(c)
|
|
int c;
|
|
{
|
|
|
|
if (cmap(c, QUOTES))
|
|
gflag = 1;
|
|
}
|
|
|
|
/*
|
|
* Form a shell temporary file (in unit 0) from the words
|
|
* of the shell input up to EOF or a line the same as "term".
|
|
* Unit 0 should have been closed before this call.
|
|
*/
|
|
void
|
|
/*ARGSUSED*/
|
|
heredoc(term)
|
|
Char *term;
|
|
{
|
|
int c;
|
|
Char *Dv[2];
|
|
Char obuf[BUFSIZ], lbuf[BUFSIZ], mbuf[BUFSIZ];
|
|
int ocnt, lcnt, mcnt;
|
|
Char *lbp, *obp, *mbp;
|
|
Char **vp;
|
|
bool quoted;
|
|
char *tmp;
|
|
|
|
if (creat(tmp = short2str(shtemp), 0600) < 0)
|
|
stderror(ERR_SYSTEM, tmp, strerror(errno));
|
|
(void) close(0);
|
|
if (open(tmp, O_RDWR) < 0) {
|
|
int oerrno = errno;
|
|
|
|
(void) unlink(tmp);
|
|
errno = oerrno;
|
|
stderror(ERR_SYSTEM, tmp, strerror(errno));
|
|
}
|
|
(void) unlink(tmp); /* 0 0 inode! */
|
|
Dv[0] = term;
|
|
Dv[1] = NULL;
|
|
gflag = 0;
|
|
trim(Dv);
|
|
rscan(Dv, Dtestq);
|
|
quoted = gflag;
|
|
ocnt = BUFSIZ;
|
|
obp = obuf;
|
|
for (;;) {
|
|
/*
|
|
* Read up a line
|
|
*/
|
|
lbp = lbuf;
|
|
lcnt = BUFSIZ - 4;
|
|
for (;;) {
|
|
c = readc(1); /* 1 -> Want EOF returns */
|
|
if (c < 0 || c == '\n')
|
|
break;
|
|
if ((c &= TRIM) != '\0') {
|
|
*lbp++ = c;
|
|
if (--lcnt < 0) {
|
|
setname("<<");
|
|
stderror(ERR_NAME | ERR_OVERFLOW);
|
|
}
|
|
}
|
|
}
|
|
*lbp = 0;
|
|
|
|
/*
|
|
* Check for EOF or compare to terminator -- before expansion
|
|
*/
|
|
if (c < 0 || eq(lbuf, term)) {
|
|
(void) write(0, short2str(obuf), (size_t) (BUFSIZ - ocnt));
|
|
(void) lseek(0, 0l, L_SET);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* If term was quoted or -n just pass it on
|
|
*/
|
|
if (quoted || noexec) {
|
|
*lbp++ = '\n';
|
|
*lbp = 0;
|
|
for (lbp = lbuf; (c = *lbp++) != '\0';) {
|
|
*obp++ = c;
|
|
if (--ocnt == 0) {
|
|
(void) write(0, short2str(obuf), BUFSIZ);
|
|
obp = obuf;
|
|
ocnt = BUFSIZ;
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Term wasn't quoted so variable and then command expand the input
|
|
* line
|
|
*/
|
|
Dcp = lbuf;
|
|
Dvp = Dv + 1;
|
|
mbp = mbuf;
|
|
mcnt = BUFSIZ - 4;
|
|
for (;;) {
|
|
c = DgetC(DODOL);
|
|
if (c == DEOF)
|
|
break;
|
|
if ((c &= TRIM) == 0)
|
|
continue;
|
|
/* \ quotes \ $ ` here */
|
|
if (c == '\\') {
|
|
c = DgetC(0);
|
|
if (!any("$\\`", c))
|
|
unDgetC(c | QUOTE), c = '\\';
|
|
else
|
|
c |= QUOTE;
|
|
}
|
|
*mbp++ = c;
|
|
if (--mcnt == 0) {
|
|
setname("<<");
|
|
stderror(ERR_NAME | ERR_OVERFLOW);
|
|
}
|
|
}
|
|
*mbp++ = 0;
|
|
|
|
/*
|
|
* If any ` in line do command substitution
|
|
*/
|
|
mbp = mbuf;
|
|
if (any(short2str(mbp), '`')) {
|
|
/*
|
|
* 1 arg to dobackp causes substitution to be literal. Words are
|
|
* broken only at newlines so that all blanks and tabs are
|
|
* preserved. Blank lines (null words) are not discarded.
|
|
*/
|
|
vp = dobackp(mbuf, 1);
|
|
}
|
|
else
|
|
/* Setup trivial vector similar to return of dobackp */
|
|
Dv[0] = mbp, Dv[1] = NULL, vp = Dv;
|
|
|
|
/*
|
|
* Resurrect the words from the command substitution each separated by
|
|
* a newline. Note that the last newline of a command substitution
|
|
* will have been discarded, but we put a newline after the last word
|
|
* because this represents the newline after the last input line!
|
|
*/
|
|
for (; *vp; vp++) {
|
|
for (mbp = *vp; *mbp; mbp++) {
|
|
*obp++ = *mbp & TRIM;
|
|
if (--ocnt == 0) {
|
|
(void) write(0, short2str(obuf), BUFSIZ);
|
|
obp = obuf;
|
|
ocnt = BUFSIZ;
|
|
}
|
|
}
|
|
*obp++ = '\n';
|
|
if (--ocnt == 0) {
|
|
(void) write(0, short2str(obuf), BUFSIZ);
|
|
obp = obuf;
|
|
ocnt = BUFSIZ;
|
|
}
|
|
}
|
|
if (pargv)
|
|
blkfree(pargv), pargv = 0;
|
|
}
|
|
}
|