14b88c807SRodney W. Grimes /*- 24b88c807SRodney W. Grimes * Copyright (c) 1991, 1993 34b88c807SRodney W. Grimes * The Regents of the University of California. All rights reserved. 44b88c807SRodney W. Grimes * 54b88c807SRodney W. Grimes * This code is derived from software contributed to Berkeley by 64b88c807SRodney W. Grimes * Kenneth Almquist. 74b88c807SRodney W. Grimes * 84b88c807SRodney W. Grimes * Redistribution and use in source and binary forms, with or without 94b88c807SRodney W. Grimes * modification, are permitted provided that the following conditions 104b88c807SRodney W. Grimes * are met: 114b88c807SRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 124b88c807SRodney W. Grimes * notice, this list of conditions and the following disclaimer. 134b88c807SRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 144b88c807SRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 154b88c807SRodney W. Grimes * documentation and/or other materials provided with the distribution. 16*fbbd9655SWarner Losh * 3. Neither the name of the University nor the names of its contributors 174b88c807SRodney W. Grimes * may be used to endorse or promote products derived from this software 184b88c807SRodney W. Grimes * without specific prior written permission. 194b88c807SRodney W. Grimes * 204b88c807SRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 214b88c807SRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 224b88c807SRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 234b88c807SRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 244b88c807SRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 254b88c807SRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 264b88c807SRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 274b88c807SRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 284b88c807SRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 294b88c807SRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 304b88c807SRodney W. Grimes * SUCH DAMAGE. 314b88c807SRodney W. Grimes */ 324b88c807SRodney W. Grimes 334b88c807SRodney W. Grimes extern char *commandname; /* currently executing command */ 344b88c807SRodney W. Grimes extern int exitstatus; /* exit status of last command */ 35384aedabSJilles Tjoelker extern int oexitstatus; /* saved exit status */ 368ef0ae8aSJilles Tjoelker extern struct arglist *cmdenviron; /* environment for builtin command */ 374b88c807SRodney W. Grimes 384b88c807SRodney W. Grimes 394b88c807SRodney W. Grimes struct backcmd { /* result of evalbackcmd */ 404b88c807SRodney W. Grimes int fd; /* file descriptor to read from */ 414b88c807SRodney W. Grimes char *buf; /* buffer */ 424b88c807SRodney W. Grimes int nleft; /* number of chars in buffer */ 434b88c807SRodney W. Grimes struct job *jp; /* job structure for command */ 444b88c807SRodney W. Grimes }; 454b88c807SRodney W. Grimes 46338b821bSJilles Tjoelker void reseteval(void); 47338b821bSJilles Tjoelker 48960da934SJilles Tjoelker /* flags in argument to evaltree/evalstring */ 49960da934SJilles Tjoelker #define EV_EXIT 01 /* exit after evaluating tree */ 50960da934SJilles Tjoelker #define EV_TESTED 02 /* exit status is checked; ignore -e flag */ 51960da934SJilles Tjoelker #define EV_BACKCMD 04 /* command executing within back quotes */ 52960da934SJilles Tjoelker 5322afca9bSJilles Tjoelker void evalstring(const char *, int); 544b88c807SRodney W. Grimes union node; /* BLETCH for ansi C */ 555134c3f7SWarner Losh void evaltree(union node *, int); 565134c3f7SWarner Losh void evalbackcmd(union node *, struct backcmd *); 574b88c807SRodney W. Grimes 584b88c807SRodney W. Grimes /* in_function returns nonzero if we are currently evaluating a function */ 594b88c807SRodney W. Grimes #define in_function() funcnest 604b88c807SRodney W. Grimes extern int funcnest; 61ab0a2172SSteve Price extern int evalskip; 6201a43bcfSJean-Sébastien Pédron extern int skipcount; 63ab0a2172SSteve Price 64ab0a2172SSteve Price /* reasons for skipping commands (see comment on breakcmd routine) */ 65ab0a2172SSteve Price #define SKIPBREAK 1 66ab0a2172SSteve Price #define SKIPCONT 2 672935c4ccSJilles Tjoelker #define SKIPRETURN 3 68