bin/sh/exec.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  *      @(#)exec.h      8.3 (Berkeley) 6/8/95
  37  * $FreeBSD: head/bin/sh/exec.h 238468 2012-07-15 10:19:43Z jilles $
  38  */
  39
  40 /* values of cmdtype */
  41 #define CMDUNKNOWN -1           /* no entry in table for command */
  42 #define CMDNORMAL 0             /* command is an executable program */
  43 #define CMDBUILTIN 1            /* command is a shell builtin */
  44 #define CMDFUNCTION 2           /* command is a shell function */
  45
  46 /* values for typecmd_impl's third parameter */
  47 enum {
  48         TYPECMD_SMALLV,         /* command -v */
  49         TYPECMD_BIGV,           /* command -V */
  50         TYPECMD_TYPE            /* type */
  51 };
  52
  53 union node;
  54 struct cmdentry {
  55         int cmdtype;
  56         union param {
  57                 int index;
  58                 struct funcdef *func;
  59         } u;
  60         int special;
  61 };
  62
  63
  64 /* action to find_command() */
  65 #define DO_ERR          0x01    /* prints errors */
  66 #define DO_NOFUNC       0x02    /* don't return shell functions, for command */
  67
  68 extern const char *pathopt;     /* set by padvance */
  69 extern int exerrno;             /* last exec error */
  70
  71 void shellexec(char **, char **, const char *, int) __dead2;
  72 char *padvance(const char **, const char *);
  73 void find_command(const char *, struct cmdentry *, int, const char *);
  74 int find_builtin(const char *, int *);
  75 void hashcd(void);
  76 void changepath(const char *);
  77 void defun(const char *, union node *);
  78 int unsetfunc(const char *);
  79 int isfunc(const char *);
  80 int typecmd_impl(int, char **, int, const char *);
  81 void clearcmdentry(void);