bin/sh/eval.h

   1 /*-
   2  * Copyright (c) 1991, 1993
   3  *      The Regents of the University of California.  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      8.2 (Berkeley) 5/4/95
  37  * $FreeBSD: src/bin/sh/eval.h,v 1.7.2.2 2002/08/27 01:36:28 tjr Exp $
  38  * $DragonFly: src/bin/sh/eval.h,v 1.3 2004/03/19 18:39:41 cpressey Exp $
  39  */
  40
  41 extern const char *commandname; /* currently executing command */
  42 extern int exitstatus;          /* exit status of last command */
  43 extern struct strlist *cmdenviron;  /* environment for builtin command */
  44
  45
  46 struct backcmd {                /* result of evalbackcmd */
  47         int fd;                 /* file descriptor to read from */
  48         char *buf;              /* buffer */
  49         int nleft;              /* number of chars in buffer */
  50         struct job *jp;         /* job structure for command */
  51 };
  52
  53 int evalcmd(int, char **);
  54 void evalstring(char *);
  55 union node;     /* BLETCH for ansi C */
  56 void evaltree(union node *, int);
  57 void evalbackcmd(union node *, struct backcmd *);
  58 int bltincmd(int, char **);
  59 int breakcmd(int, char **);
  60 int returncmd(int, char **);
  61 int falsecmd(int, char **);
  62 int truecmd(int, char **);
  63 int execcmd(int, char **);
  64 int commandcmd(int, char **);
  65
  66 /* in_function returns nonzero if we are currently evaluating a function */
  67 #define in_function()   funcnest
  68 extern int funcnest;
  69 extern int evalskip;
  70
  71 /* reasons for skipping commands (see comment on breakcmd routine) */
  72 #define SKIPBREAK       1
  73 #define SKIPCONT        2
  74 #define SKIPFUNC        3
  75 #define SKIPFILE        4