i86/elks/elkscmd/ash/eval.h

   1 /*-
   2  * Copyright (c) 1991 The Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Kenneth Almquist.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  *      @(#)eval.h      5.2 (Berkeley) 4/12/91
  37  */
  38
  39 extern char *commandname;       /* currently executing command */
  40 extern int exitstatus;          /* exit status of last command */
  41 extern struct strlist *cmdenviron;  /* environment for builtin command */
  42
  43
  44 struct backcmd {                /* result of evalbackcmd */
  45         int fd;                 /* file descriptor to read from */
  46         char *buf;              /* buffer */
  47         int nleft;              /* number of chars in buffer */
  48         struct job *jp;         /* job structure for command */
  49 };
  50
  51
  52 #ifdef __STDC__
  53 void evalstring(char *);
  54 union node;     /* BLETCH for ansi C */
  55 void evaltree(union node *, int);
  56 void evalbackcmd(union node *, struct backcmd *);
  57 #else
  58 void evalstring();
  59 void evaltree();
  60 void evalbackcmd();
  61 #endif
  62
  63 /* in_function returns nonzero if we are currently evaluating a function */
  64 #define in_function()   funcnest
  65 extern int funcnest;