projects / apple / shell_cmds.git / blame
| Commit | Line | Data |
|---|---|---|
| 71aad674 A |
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. | |
| 254f12f7 | 16 | * 3. Neither the name of the University nor the names of its contributors |
| 71aad674 A |
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 | * @(#)eval.h 8.2 (Berkeley) 5/4/95 | |
| 254f12f7 | 33 | * $FreeBSD: head/bin/sh/eval.h 314436 2017-02-28 23:42:47Z imp $ |
| 71aad674 A |
34 | */ |
| 35 | ||
| 36 | extern char *commandname; /* currently executing command */ | |
| 37 | extern int exitstatus; /* exit status of last command */ | |
| 38 | extern int oexitstatus; /* saved exit status */ | |
| deb63bfb | 39 | extern struct arglist *cmdenviron; /* environment for builtin command */ |
| 71aad674 A |
40 | |
| 41 | ||
| 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 */ | |
| 47 | }; | |
| 48 | ||
| 49 | void reseteval(void); | |
| 50 | ||
| 51 | /* flags in argument to evaltree/evalstring */ | |
| 52 | #define EV_EXIT 01 /* exit after evaluating tree */ | |
| 53 | #define EV_TESTED 02 /* exit status is checked; ignore -e flag */ | |
| 54 | #define EV_BACKCMD 04 /* command executing within back quotes */ | |
| 55 | ||
| 56 | void evalstring(const char *, int); | |
| 57 | union node; /* BLETCH for ansi C */ | |
| 58 | void evaltree(union node *, int); | |
| 59 | void evalbackcmd(union node *, struct backcmd *); | |
| 60 | ||
| 61 | /* in_function returns nonzero if we are currently evaluating a function */ | |
| 62 | #define in_function() funcnest | |
| 63 | extern int funcnest; | |
| 64 | extern int evalskip; | |
| 65 | extern int skipcount; | |
| 66 | ||
| 67 | /* reasons for skipping commands (see comment on breakcmd routine) */ | |
| 68 | #define SKIPBREAK 1 | |
| 69 | #define SKIPCONT 2 | |
| 70 | #define SKIPRETURN 3 |