2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1997-2005
5 * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * @(#)eval.h 8.2 (Berkeley) 5/4/95
37 extern char *commandname; /* currently executing command */
38 extern int exitstatus; /* exit status of last command */
39 extern int back_exitstatus; /* exit status of backquoted command */
42 struct backcmd { /* result of evalbackcmd */
43 int fd; /* file descriptor to read from */
44 char *buf; /* buffer */
45 int nleft; /* number of chars in buffer */
46 struct job *jp; /* job structure for command */
49 /* flags in argument to evaltree */
50 #define EV_EXIT 01 /* exit after evaluating tree */
51 #define EV_TESTED 02 /* exit status is checked; ignore -e flag */
53 int evalstring(char *, int);
54 union node; /* BLETCH for ansi C */
55 void evaltree(union node *, int);
56 void evalbackcmd(union node *, struct backcmd *);
60 /* reasons for skipping commands (see comment on breakcmd routine) */
61 #define SKIPBREAK (1 << 0)
62 #define SKIPCONT (1 << 1)
63 #define SKIPFUNC (1 << 2)