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  1. /*  $NetBSD: eval.h,v 1.10 2000/01/27 23:39:40 christos Exp $   */
  2.  
  3. /*-
  4.  * Copyright (c) 1991, 1993
  5.  *  The Regents of the University of California.  All rights reserved.
  6.  *
  7.  * This code is derived from software contributed to Berkeley by
  8.  * Kenneth Almquist.
  9.  *
  10.  * Redistribution and use in source and binary forms, with or without
  11.  * modification, are permitted provided that the following conditions
  12.  * are met:
  13.  * 1. Redistributions of source code must retain the above copyright
  14.  *    notice, this list of conditions and the following disclaimer.
  15.  * 2. Redistributions in binary form must reproduce the above copyright
  16.  *    notice, this list of conditions and the following disclaimer in the
  17.  *    documentation and/or other materials provided with the distribution.
  18.  * 3. All advertising materials mentioning features or use of this software
  19.  *    must display the following acknowledgement:
  20.  *  This product includes software developed by the University of
  21.  *  California, Berkeley and its contributors.
  22.  * 4. Neither the name of the University nor the names of its contributors
  23.  *    may be used to endorse or promote products derived from this software
  24.  *    without specific prior written permission.
  25.  *
  26.  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  27.  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28.  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29.  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  30.  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31.  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32.  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33.  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34.  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35.  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36.  * SUCH DAMAGE.
  37.  *
  38.  *  @(#)eval.h  8.2 (Berkeley) 5/4/95
  39.  */
  40.  
  41. extern 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 *, int);
  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 is_special_builtin (const 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
  76.