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freebsd-dev/bin/sh/eval.h

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BSD 4.4 Lite bin Sources
1994-05-26 06:18:55 +00:00
/*-
* 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.
Renumber copyright clause 4 Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
2017-02-28 23:42:47 +00:00
* 3. Neither the name of the University nor the names of its contributors
BSD 4.4 Lite bin Sources
1994-05-26 06:18:55 +00:00
* 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.
*
Merge of 4.4-Lite2 sh source, plus some gcc -Wall cleaning. This is a merge of parallel duplicate work by Steve Price and myself. :-] There are some changes to the build that are my fault... mkinit.c was trying (poorly) to duplicate some of the work that make(1) is designed to do. The Makefile hackery is my fault too, the depend list was incomplete because of some explicit OBJS+= entries, so mkdep wasn't picking up their source file #includes. This closes a pile of /bin/sh PR's, but not all of them.. Submitted by: Steve Price <steve@bonsai.hiwaay.net>, peter
1996-09-01 10:22:36 +00:00
* @(#)eval.h 8.2 (Berkeley) 5/4/95
$Id$ -> $FreeBSD$
1999-08-27 23:15:48 +00:00
* $FreeBSD$
BSD 4.4 Lite bin Sources
1994-05-26 06:18:55 +00:00
*/
extern char *commandname; /* currently executing command */
extern int exitstatus; /* exit status of last command */
sh: Various warning fixes (from WARNS=6 NO_WERROR=1): - const - initializations to silence -Wuninitialized (it was safe anyway) - remove nested extern declarations - rename "index" locals to "idx"
2009-12-27 18:04:05 +00:00
extern int oexitstatus; /* saved exit status */
sh: Make struct arglist an array instead of a linked list. This simplifies the code (e.g. allowing use of qsort(3) instead of a hand-rolled mergesort) and should have better cache properties. The waste of unused args arrays after resizes is approximately the same as the savings from getting rid of the next pointers. At the same time, remove a piece of global state and move some duplicated code into a function.
2015-10-11 21:33:00 +00:00
extern struct arglist *cmdenviron; /* environment for builtin command */
BSD 4.4 Lite bin Sources
1994-05-26 06:18:55 +00:00
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 */
};
sh: Remove mkinit. Replace the RESET blocks with regular functions and a reset() function that calls them all. This code generation tool is unusual and does not appear to provide much benefit. I do not think isolating the knowledge about which modules need to be reset is worth an almost 500-line build tool and wider scope for variables used by the reset functions. Also, relying on reset functions is often wrong: the cleanup should be done in exception handlers so that no stale state remains after 'command eval' and the like.
2013-07-25 15:08:41 +00:00
void reseteval(void);
Avoid leaving unnecessary waiting shells in many forms of sh -c COMMAND. This change only affects strings passed to -c, when the -s option is not used. The approach is to check if there may be additional data in the string after parsing each command. If there is none, use the EV_EXIT flag so that a fork may be omitted in specific cases. If there are empty lines after the command, the check will not see the end and forks will not be omitted. The same thing seems to happen in bash. Example: sh -c 'ps lT' No longer shows a shell process waiting for ps to finish. PR: bin/113860 Reviewed by: stefanf Approved by: ed (mentor)
2009-06-13 21:17:45 +00:00
/* flags in argument to evaltree/evalstring */
#define EV_EXIT 01 /* exit after evaluating tree */
#define EV_TESTED 02 /* exit status is checked; ignore -e flag */
#define EV_BACKCMD 04 /* command executing within back quotes */
sh: Fix more compiler warnings.
2015-03-01 22:32:23 +00:00
void evalstring(const char *, int);
BSD 4.4 Lite bin Sources
1994-05-26 06:18:55 +00:00
union node; /* BLETCH for ansi C */
o __P has been reoved o Old-style K&R declarations have been converted to new C89 style o register has been removed o prototype for main() has been removed (gcc3 makes it an error) o int main(int argc, char *argv[]) is the preferred main definition. o Attempt to not break style(9) conformance for declarations more than they already are. o Change int foo() { ... to int foo(void) { ...
2002-02-02 06:50:57 +00:00
void evaltree(union node *, int);
void evalbackcmd(union node *, struct backcmd *);
BSD 4.4 Lite bin Sources
1994-05-26 06:18:55 +00:00
/* in_function returns nonzero if we are currently evaluating a function */
#define in_function() funcnest
extern int funcnest;
Merge in NetBSD mods and -Wall cleaning. Obtained from: NetBSD, me
1996-12-14 06:20:03 +00:00
extern int evalskip;
sh: Fix execution of multiple statements in a trap when evalskip is set Before this fix, only the first statement of the trap was executed if evalskip was set. This is for example the case when: o "-e" is set for this shell o a trap is set on EXIT o a function returns 1 and causes the script to abort Reviewed by: jilles MFC after: 2 weeks
2012-01-16 11:07:46 +00:00
extern int skipcount;
Merge in NetBSD mods and -Wall cleaning. Obtained from: NetBSD, me
1996-12-14 06:20:03 +00:00
/* reasons for skipping commands (see comment on breakcmd routine) */
#define SKIPBREAK 1
#define SKIPCONT 2
sh: Make return return from the closest function or dot script. Formerly, return always returned from a function if it was called from a function, even if there was a closer dot script. This was for compatibility with the Bourne shell which only allowed returning from functions. Other modern shells and POSIX return from the function or the dot script, whichever is closest. Git 1.8.4's rebase --continue depends on the POSIX behaviour. Reported by: Christoph Mallon, avg
2013-09-04 22:10:16 +00:00
#define SKIPRETURN 3
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