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Diffstat (limited to 'bin/sh/eval.h')
| -rw-r--r-- | bin/sh/eval.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/bin/sh/eval.h b/bin/sh/eval.h new file mode 100644 index 0000000..b18dd42 --- /dev/null +++ b/bin/sh/eval.h @@ -0,0 +1,87 @@ +/* $NetBSD: eval.h,v 1.22 2018/12/03 06:43:19 kre Exp $ */ + +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Kenneth Almquist. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)eval.h 8.2 (Berkeley) 5/4/95 + */ + +extern const char *commandname; /* currently executing command */ +extern int exitstatus; /* exit status of last command */ +extern int back_exitstatus; /* exit status of backquoted command */ +extern struct strlist *cmdenviron; /* environment for builtin command */ + + +struct backcmd { /* result of evalbackcmd */ + int fd; /* file descriptor to read from */ + char *buf; /* buffer */ + int nleft; /* number of chars in buffer */ + struct job *jp; /* job structure for command */ +}; + +void evalstring(char *, int); +union node; /* BLETCH for ansi C */ +void evaltree(union node *, int); +void evalbackcmd(union node *, struct backcmd *); + +const char *syspath(void); + +/* in_function returns nonzero if we are currently evaluating a function */ +int in_function(void); /* return non-zero, if evaluating a function */ + +/* reasons for skipping commands (see comment on breakcmd routine) */ +enum skipstate { + SKIPNONE = 0, /* not skipping */ + SKIPBREAK, /* break */ + SKIPCONT, /* continue */ + SKIPFUNC, /* return in a function */ + SKIPFILE /* return in a dot command */ +}; + +struct skipsave { + enum skipstate state; /* skipping or not */ + int count; /* when break or continue, how many */ +}; + +enum skipstate current_skipstate(void); +void save_skipstate(struct skipsave *); +void restore_skipstate(const struct skipsave *); +void stop_skipping(void); /* reset internal skipping state to SKIPNONE */ + +/* + * Only for use by reset() in init.c! + */ +void reset_eval(void); + +/* flags in argument to evaltree */ +#define EV_EXIT 0x01 /* exit after evaluating tree */ +#define EV_TESTED 0x02 /* exit status is checked; ignore -e flag */ +#define EV_BACKCMD 0x04 /* command executing within back quotes */ |