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. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  *      @(#)exec.h      8.3 (Berkeley) 6/8/95
  33  * $FreeBSD$
  34  */
  35
  36 /* values of cmdtype */
  37 #define CMDUNKNOWN -1           /* no entry in table for command */
  38 #define CMDNORMAL 0             /* command is an executable program */
  39 #define CMDBUILTIN 1            /* command is a shell builtin */
  40 #define CMDFUNCTION 2           /* command is a shell function */
  41
  42 /* values for typecmd_impl's third parameter */
  43 enum {
  44         TYPECMD_SMALLV,         /* command -v */
  45         TYPECMD_BIGV,           /* command -V */
  46         TYPECMD_TYPE            /* type */
  47 };
  48
  49 union node;
  50 struct cmdentry {
  51         int cmdtype;
  52         union param {
  53                 int index;
  54                 struct funcdef *func;
  55         } u;
  56         int special;
  57 };
  58
  59
  60 /* action to find_command() */
  61 #define DO_ERR          0x01    /* prints errors */
  62 #define DO_NOFUNC       0x02    /* don't return shell functions, for command */
  63
  64 extern const char *pathopt;     /* set by padvance */
  65 extern int exerrno;             /* last exec error */
  66
  67 void shellexec(char **, char **, const char *, int) __dead2;
  68 char *padvance(const char **, const char *);
  69 void find_command(const char *, struct cmdentry *, int, const char *);
  70 int find_builtin(const char *, int *);
  71 void hashcd(void);
  72 void changepath(const char *);
  73 void defun(const char *, union node *);
  74 int unsetfunc(const char *);
  75 int isfunc(const char *);
  76 int typecmd_impl(int, char **, int, const char *);
  77 void clearcmdentry(void);