4783843fdc
the non-vfork case. Having said that, it would be nice if pipelines of simple commands were vforked too. Right now they are not. Explain that setpgid() might fail because we are doing it both in the parent and the child case, because we don't know which one will come first. Suspending a pipeline prints %1 Suspended n times where n is the number of processes, but that was there before. It is easy to fix, but I'll leave the code alone for now.
75 lines
3.1 KiB
C
75 lines
3.1 KiB
C
/* $NetBSD: eval.h,v 1.12 2002/09/28 01:25:01 christos Exp $ */
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/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Kenneth Almquist.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)eval.h 8.2 (Berkeley) 5/4/95
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*/
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extern char *commandname; /* currently executing command */
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extern int exitstatus; /* exit status of last command */
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extern struct strlist *cmdenviron; /* environment for builtin command */
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struct backcmd { /* result of evalbackcmd */
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int fd; /* file descriptor to read from */
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char *buf; /* buffer */
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int nleft; /* number of chars in buffer */
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struct job *jp; /* job structure for command */
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};
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int evalcmd __P((int, char **));
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void evalstring __P((char *, int));
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union node; /* BLETCH for ansi C */
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void evaltree __P((union node *, int));
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void evalbackcmd __P((union node *, struct backcmd *));
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int bltincmd __P((int, char **));
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int breakcmd __P((int, char **));
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int returncmd __P((int, char **));
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int falsecmd __P((int, char **));
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int truecmd __P((int, char **));
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int execcmd __P((int, char **));
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/* in_function returns nonzero if we are currently evaluating a function */
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#define in_function() funcnest
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extern int funcnest;
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extern int evalskip;
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/* reasons for skipping commands (see comment on breakcmd routine) */
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#define SKIPBREAK 1
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#define SKIPCONT 2
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#define SKIPFUNC 3
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#define SKIPFILE 4
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